WorldWideScience

Sample records for chamber intraocular lens

  1. Out-of-the-bag intraocular lens dislocation: outcomes of posterior chamber intraocular lens exchange, risk factors, and prevention

    Institute of Scientific and Technical Information of China (English)

    ZHENG Dan-ying; CHEN Li-na; SUN Yi; SHAO Ying-feng; LIANG Jing-li; LIU Yi-zhi

    2010-01-01

    Background Dislocation of posterior chamber intraocular lens is one of the most common complications of intraocular lens implantation. Lens exchange is an effective solution to this unsatisfactory status. This study was conducted to analyze the possible predisposing factors for out-of-the-bag posterior chamber intraocular lens dislocation and to study the outcomes of lens exchange surgery.Methods Thirty-six consecutive patients (36 eyes) with out-of-the-bag intraocular lens dislocation who underwent posterior chamber intraocular lens exchange in Zhongshan Ophthalmic Center of Sun Yat-sen University (Guangdong,China) from January 2003 to October 2009 were included. A 6-month follow-up was completed. The causes for out-of-the-bag intraocular lens dislocation and visual outcomes of posterior chamber intraocular lens exchange were analyzed. The out-of-the-bag intraocular lens dislocation was diagnosed on the basis of the findings from slit-lamp microscope and B-ultrasound. The dislocated intraocular lens was explanted. Reimplantation of a new posterior chamber intraocular lens was performed in each case using standardized surgical procedures.Results In this study, a total of thirty-six consecutive patients (36 eyes) with out-of-the-bag intraocular lens dislocation underwent posterior chamber intraocular lens exchange surgery. Causes for out-of-the-bag intraocular lens dislocation included posterior capsule rupture during the initial cataract extraction procedure (23 eyes, 63.8%), trauma (5 eyes,13.9%), neodymium-doped yttrium aluminium garnet (Nd:YAG) laser-induced dislocation (2 eyes, 5.6%), the status after vitrectomy (2 eyes, 5.6%) and unidentifiable etiology (4 eyes, 11.1%). Symptoms of these patients mainly included decrease in visual acuity (17 cases, 47.2%), blurred vision (16 cases, 44.4%), glare (1 case, 2.8%), diplopia (1 case,2.8%), and halo (1 case, 2.8%). Intraocular lens dislocation into the posterior vitreous cavity (29 eyes, 80.5%), anterior chamber (1

  2. Posterior chamber phakic intraocular lens implantation for high myopia

    Institute of Scientific and Technical Information of China (English)

    沈晔; 杜持新; 顾扬顺; 王竞

    2003-01-01

    Objective To evaluate the efficacy, safety and stability of posterior chamber phakic intraocular lens (PIOLs) implantation for the correction of high myopia.Methods Thirty-nine eyes of twenty patients with high myopia (between-11.75 and-25.75 diopters) had a posterior chamber PIOL (Staar ICL) implanted. During 6-48 months' follow-up, visual acuity, refraction, intraocular pressure (IOP), corneal reaction and space between crystal lens and intraocular lens (IOLs) were tested.Results Successful implantation was achieved in all patients. Visual acuity without correction greater than 0.5 was found in 34 eyes at 1 day and 3 months postoperatively. Thirty-five eyes maintained a low negative power of refraction (-1.42±1.32 doipters), which did not prevent the patients from most of their daily activities. During 3-48 months' follow-up, refraction was stable and no cornea edema and glaucoma was found. Two eyes of one patient had corticosteroid glaucoma and another eye showed cataractogenesis under anterior capsular membrane.Conclusion Posterior chamber PIOL implantation is predictable, safe, and effective in the correction of high myopia, and its indications should be carefully selected.

  3. Bilateral spontaneous dislocation of posterior chamber intraocular lens in a patient with gyrate atrophy

    Directory of Open Access Journals (Sweden)

    Michael Kinori

    2012-01-01

    Full Text Available We report a patient with gyrate atrophy, a rare metabolic disease, who had bilateral late spontaneous posterior dislocation of in-the-bag posterior chamber intraocular lens (PCIOL. He underwent pars plana vitrectomy, PCIOL retrieval and anterior chamber intraocular lens implantation in both eyes. This report may imply that patients with gyrate atrophy are at risk for spontaneous dislocation of intraocular lenses.

  4. Spontaneous Scleral Perforation of an Anterior Chamber Intraocular Lens

    Science.gov (United States)

    Spierer, Oriel; O'Brien, Terrence P.

    2016-01-01

    A routine eye examination of a 69-year-old man revealed a scleral perforation of one of the haptics of the anterior chamber intraocular lens (AC IOL) which had been implanted many years ago. The patient was asymptomatic with good visual acuity. His history was negative for any trauma, eye rubbing, topical corticosteroid use, or autoimmune disease. The horizontal and vertical white-to-white diameters of the cornea in the right eye were 11.5 and 10.5 mm, respectively. Anterior segment optical coherence tomography showed the anterior chamber length to be 12.28 mm horizontally and 10.63 mm vertically. The patient underwent an IOL exchange, and the length of the explanted AC IOL was measured to be 12 mm. We speculate that the AC IOL, which was vertically aligned, was oversized. This case demonstrates the need for proper sizing and positioning of an AC IOL. In complex cases where AC IOL may be used, measuring the horizontal and vertical lengths of the anterior chamber by anterior segment optical coherence tomography prior to surgery may be useful.

  5. Spontaneous Scleral Perforation of an Anterior Chamber Intraocular Lens

    Directory of Open Access Journals (Sweden)

    Oriel Spierer

    2016-05-01

    Full Text Available A routine eye examination of a 69-year-old man revealed a scleral perforation of one of the haptics of the anterior chamber intraocular lens (AC IOL which had been implanted many years ago. The patient was asymptomatic with good visual acuity. His history was negative for any trauma, eye rubbing, topical corticosteroid use, or autoimmune disease. The horizontal and vertical white-to-white diameters of the cornea in the right eye were 11.5 and 10.5 mm, respectively. Anterior segment optical coherence tomography showed the anterior chamber length to be 12.28 mm horizontally and 10.63 mm vertically. The patient underwent an IOL exchange, and the length of the explanted AC IOL was measured to be 12 mm. We speculate that the AC IOL, which was vertically aligned, was oversized. This case demonstrates the need for proper sizing and positioning of an AC IOL. In complex cases where AC IOL may be used, measuring the horizontal and vertical lengths of the anterior chamber by anterior segment optical coherence tomography prior to surgery may be useful.

  6. Spontaneous Scleral Perforation of an Anterior Chamber Intraocular Lens

    Science.gov (United States)

    Spierer, Oriel; O'Brien, Terrence P.

    2016-01-01

    A routine eye examination of a 69-year-old man revealed a scleral perforation of one of the haptics of the anterior chamber intraocular lens (AC IOL) which had been implanted many years ago. The patient was asymptomatic with good visual acuity. His history was negative for any trauma, eye rubbing, topical corticosteroid use, or autoimmune disease. The horizontal and vertical white-to-white diameters of the cornea in the right eye were 11.5 and 10.5 mm, respectively. Anterior segment optical coherence tomography showed the anterior chamber length to be 12.28 mm horizontally and 10.63 mm vertically. The patient underwent an IOL exchange, and the length of the explanted AC IOL was measured to be 12 mm. We speculate that the AC IOL, which was vertically aligned, was oversized. This case demonstrates the need for proper sizing and positioning of an AC IOL. In complex cases where AC IOL may be used, measuring the horizontal and vertical lengths of the anterior chamber by anterior segment optical coherence tomography prior to surgery may be useful. PMID:27462251

  7. Spontaneous Scleral Perforation of an Anterior Chamber Intraocular Lens.

    Science.gov (United States)

    Spierer, Oriel; O'Brien, Terrence P

    2016-01-01

    A routine eye examination of a 69-year-old man revealed a scleral perforation of one of the haptics of the anterior chamber intraocular lens (AC IOL) which had been implanted many years ago. The patient was asymptomatic with good visual acuity. His history was negative for any trauma, eye rubbing, topical corticosteroid use, or autoimmune disease. The horizontal and vertical white-to-white diameters of the cornea in the right eye were 11.5 and 10.5 mm, respectively. Anterior segment optical coherence tomography showed the anterior chamber length to be 12.28 mm horizontally and 10.63 mm vertically. The patient underwent an IOL exchange, and the length of the explanted AC IOL was measured to be 12 mm. We speculate that the AC IOL, which was vertically aligned, was oversized. This case demonstrates the need for proper sizing and positioning of an AC IOL. In complex cases where AC IOL may be used, measuring the horizontal and vertical lengths of the anterior chamber by anterior segment optical coherence tomography prior to surgery may be useful.

  8. The Effect of Phacoemulsification with Posterior Chamber Intraocular Lens Implantation on Intraocular Pressure and Anterior Chamber Depth

    Directory of Open Access Journals (Sweden)

    Mohammad Javad Mohamadi

    2013-12-01

    Full Text Available Purpose: To evaluate intraocular pressure (IOP and anterior chamber depth (ACD change after phacoemulsification with posterior chamber intraocular lens implantation Methods: In this quasi-experimental study, 84 patients with senile cataract were included. All patients had normal IOP. Patients with traumatic and complicated cataract, any history of uveitis, glaucoma, or other ocular disease or surgery were excluded. Patients underwent phacoemulsification and intraocular lens implantation by the same surgeon. IOP, ACD, and lens thickness were measured and recorded before surgery. IOP was measured at 4, 8 and 12 postoperative weeks and ACD was measured 12 weeks after surgery. Results: The mean preoperative ACD significantly increased from 2.93 mm to 3.54 mm postoperatively (p<0.0001. Mean preoperative IOP was 16.06 mmHg which decreased to 12.01 IOP mmHg, 12.57 mmHg and 12.90 mmHg at 4 weeks, 8 weeks and 12 weeks postoperatively, respectively (all p-values<0.0001. There was a correlation between lens thickness and changes of and ACD after the surgery. There was also a positive correlation between preoperative IOP and IOP reduction after the surgery. Conclusion: Phacoemulsification decreases IOP specially in eyes with higher preoperative IOP and thicker lenses.

  9. New Management of Malignant Glaucoma by Phacoemulsification with Posterior Chamber Foldable Intraocular Lens Implantation

    Institute of Scientific and Technical Information of China (English)

    GeJian; GuoY

    1999-01-01

    Objective:To investigate the feasibility of phacoemulsification with posterior chamber foldable intraocular lens implantation in the management of malignant glaucoma. Patients and Methods:Fourteen patients with malignant glaucoma diagnosed in the Department of Glaucoma were enrolled in the study.12 patients developed malignant glaucoma after filtration surgery.1 developed after peripheral iridectomy.1 patient developed malignant glaucoma without any clear cause.Cataract phacoemulsification was performed.Posterior chamber intraocular foldable lens was implanted in 10 cases of patients.Results:All 14 patients were cured wiht normal intraocular pressure,normal anterior chamber depth and increased visual acuity.Conclusion:Phacoemulsification with posterior chamber foldable intraocular lens implantation is a good alternative in treating malignant glaucoma.

  10. Delayed Hyphema after Posterior Chamber Intraocular Lens Implantation

    Institute of Scientific and Technical Information of China (English)

    1994-01-01

    A56-year-old man with senile cataract in the left eye underwent extracapsularcataract extraction(ECCE)and posteriorchamber intraocular lens(IOL)implanta-tion on December 19,1988.A 13D J-loopplannar lens was inserted in the ciliary sul-cus.The operation was successful with mildpostoperative response.His corrected visionwas 20/20. He had a follow-up examination onMarch 20,1989.No complication was notedand his vision retained 20/20.In theevening of the same day,the patient sud-denly felt discomfortable and...

  11. Anterior chamber fixation of a posterior chamber intraocular lens: A novel technique

    Directory of Open Access Journals (Sweden)

    A Sahap Kükner

    2014-01-01

    Full Text Available We aimed to evaluate the implantation of a posterior chamber intraocular lens (IOL in the anterior chamber (AC with the haptics passing through two iridectomies to the posterior chamber. A total of 33 eyes of 33 patients with inadequate posterior capsular support due to either previous aphakia or posterior capsular rupture during cataract extraction were included in the study. A double iridectomy was performed on all patients using a vitrectomy probe on the midperiphery of the iris. IOLs were implanted in the AC, and the haptics were passed through the iridectomies to the posterior chamber. The mean follow-up time was 25.3 months. AC hemorrhage occurred in five patients during the iridectomy procedure. Corneal edema was detected in eight of 14 patients with primary IOL insertions. Haptic dislocation was detected in only one patient. This technique may be a good alternative to scleral-fixated IOL implantation in eyes with aphakia.

  12. Fifty-year follow-up and Strampelli anterior chamber intraocular lens.

    Science.gov (United States)

    Oakley, Carmen L; Nigro, Matthew A; Vote, Brendan J

    2015-01-01

    The Strampelli anterior chamber intraocular lens was created in 1953, and was primarily used to treat myopia and aphakia. Due to the positioning of the lens, it was associated with a number of complications, and was later modified to decrease the rate of significant complications, including endothelial cell loss. This paper describes a 62-year-old man, who has had a Strampelli intraocular lens (IOL) in situ for 52 years, with relatively few complications. The case provides a framework for reflection on the significant advances in the development of IOLs since the Strampelli era. The Strampelli anterior chamber intraocular lens was created in 1953, and was primarily used to treat myopia and aphakia. Due to the positioning of the lens, it was associated with a number of complications, and was later modified to decrease the rate of significant complications, including endothelial cell loss. This paper describes a 62-year-old man, who has had a Strampelli intraocular lens (IOL) in situ for 52 years, with relatively few complications. The case provides a framework for reflection on the significant advances in the development of IOLs since the Strampelli era.

  13. Pars plana cicatrization of sewn-in posterior chamber intraocular lens haptics.

    Science.gov (United States)

    McDermott, M L; Puklin, J E

    1997-03-01

    The authors describe the unexpected finding of cicatrization of posterior chamber lens haptics to the pars plana. This was found during removal of a secondary, transscleral sewn-in pseudophakos during a retinal reattachment procedure. Ophthalmic history and intraoperative photography revealed pars plana cicatrization of haptics. Despite removal of trans-scleral prolene fixation sutures and application of gentle traction, the posterior chamber lens haptics remained firmly adherent to pars plana retina. The haptics were amputated to prevent significant chorioretinal damage. The conventional belief that all sewn-in posterior chamber intraocular lenses cause little or no scarring response around the haptics may be unfounded.

  14. Intraocular lens dislocation and tube shunt in the posterior chamber: a case report

    OpenAIRE

    Moreno-Montañés, Javier; Velázquez-Villoria, Alvaro; Sabater, Alfonso L.; Salinas-Alamán, Angel

    2015-01-01

    Background To describe management of a case of intraocular lens (IOL) and capsular bag (CB) dislocation in an eye with an Ahmed glaucoma valve in the posterior chamber. Case presentation A 75-year-old pseudophakic man with open-angle glaucoma and diabetic retinopathy developed neovascular glaucoma. After two intravitreous injections of bevacizumab and panretinal photocoagulation were administered, the new vessels regressed. However, goniosynechiae were observed over 360° of the angle. An Ahme...

  15. New Management of Angle-closure Glaucoma by Phacoemulsification with Foldable Posterior Chamber Intraocular Lens Implantation

    Institute of Scientific and Technical Information of China (English)

    Jian Ge; Yan Guo; Yizhi Liu; Mingkai Lin; Yehong Zhuo; Bing Chen; Xiuqi Chen

    2000-01-01

    Objective: To investigate the management of angle-closure glaucoma by phacoemulsification with foldable posterior chamber intraocular lens (PC-IOL) implantation. Design: Retrospective, noncontrolled interventional case series.Participants: In 36 eyes with angle-closure glaucoma (ACG), there were 18 eyes with primary acute angle-closure glaucoma (PACG), 14 eyes with primary chronic angle-closure glaucoma (PCCG), 3 eyes with secondary acute angle-closure glaucoma (SACG) and 1 eye with secondary chronic angle-closure glaucoma (SCCG).Intervention: Phacoemulsification with posterior chamber intraocular lens implantation.Main Outcome Measures: Postoperative visual acuity, IOP, axial anterior chamber depth.Results: After a mean postoperative follow-up time of 8.81 ± 7.45 months, intraocular pressure was reduced from a preoperative mean of 23.81 ± 17.84 mmHg to a postoperative mean of 12.54 ± 4. 73 mmHg ( P = 0. 001 ). Mean anterior chamber depth was 1.75 ± 0.48 mm preoperatively and 2.29 ± 0.38 mm postoperatively ( P = 0. 000).Best spectacle-corrected visual acuity in 36 eyes ranged from 0. 01 to 0. 7 (20/200 to 20/30) postoperatively, which was better than preoperative VA ranging from hand movement to 0.4 (20/50) ( P= 0. 000).Conclusion: Phacoemulsification with posterior chamber foldable intraocular lens implantation can be a good alternative in treating angle-closure glaucoma. Eye Science 2000; 16:22 ~ 28.

  16. New Management of Angle-closure Glaucoma by Phacoemulsification with Folable Posterior Chamber Intraocular Lens Implantation

    Institute of Scientific and Technical Information of China (English)

    JianGE; YanGuo; 等

    2002-01-01

    Objective:To investigate the management of angle-closure glaucoma by phacoemulsification with foldable posterior chamber intraocular lens (PC-IOIL)implantation.Design:Retrospective,noncontrolled interventional case series.Participants:In 36 eyes with angle -closure glaucoma(ACG).there were 18eyes with primary acute angle-closure glaucoma(PACG),14 eyes with primary chonic angle -closure glaucoma(PCCG),3 eyes with secondary acute angle-closure glaucoma (SACG) and 1 eye with secondary chronic angle -closure glaucoma(SCCG).Intervention:Phacoemulsification with posterior chamber intraocular lens implantation.Main Outcome Measures:Postoperative visual acuity,IOP,axial anterior chamber depth.Results:After a mean postoperative follow -time of 8.81±7.45 months,intraocular pressure was reduced from a preoperative mean of 23.81±17.84 mmHg to a postoperative mean of 12.54±4.73mmHg(P=0.001).Mean anterior chamber depth was 1.75±0.48 mm preoiperatively and 2.29±0.38mm postoperatively(P-0.000).Best spectacle-corrected visual acuity in 36 eyes ranged from 0.01 to 0.7(20/200 to 20/30)postoperatively,which was better than preoperative VA ranging from hand movement to 0.4(20/50)(P=0.000).Conclusion:Phacoemulsification with posterior chamber foldable intraocular lens implantation can be a good alternative in treating angle-closure glaucoma.Eye Science2000;16:22-28.

  17. The Clinical Analysis of Secondary Glaucoma Following Posterior Chamber Intraocular Lens Implantation

    Institute of Scientific and Technical Information of China (English)

    1994-01-01

    We present 14 patients with secondary gluacoma following the implantation of a posterior chamber intraocular lens (lOLs). All patients were u-nilateral gluacoma , which developed within 1 month following the IOL implantation in 10 cases, and from 1 to 3 years in 4 cases. The angle of anterior chamber was open in 8 patients, and close in 6 ones. Seven patients required treatment of antiglaucomatous medicine; 4 patients underwent laser indecto-my and 3 patients required antiglaucoma surgery. The results s...

  18. Spontaneous fracture of an implanted posterior chamber polyimide intraocular lens haptic: A case report

    Directory of Open Access Journals (Sweden)

    Haemin Kang

    2014-01-01

    Full Text Available A 57-year-old male patient visited our clinic for decreased visual acuity in the right eye for 10 days. He denied any trauma history, but recalled that the symptom developed after straining. He had undergone uncomplicated phacoemulsification and posterior chamber intraocular lens (IOL implantation in the bag of the right eye 11 years ago. The IOL was a three-piece silicone polyimide-haptics design. On slit-lamp examination, the IOL optic and proximal part of nasal fractured haptic were found in the anterior chamber. The distal part of fractured haptic was observed in the capsular bag. He underwent IOL exchange. The fracture site of the haptic was near the optic-haptic junction. This is the unique case report of a spontaneous fracture of an implanted posterior chamber polyimide IOL haptic, which implies the possibility of IOL haptic fracture in various haptic materials.

  19. Uveitis-glaucoma-hyphema syndrome caused by posterior chamber intraocular lens--a rare complication in pediatric cataract surgery.

    Science.gov (United States)

    Lin, Chun-Ju; Tan, Chau-Yi; Lin, Szu-Yuan; Jou, Jieh-Ren

    2008-01-01

    We report a case of postoperative uveitis-glaucome-hyphema (UGH) syndrome following pediatric cataract surgery due to posterior chamber intraocular lens (PC-IOL). Slit-lamp examination revealed the optic of PC-IOL migrated into anterior chamber. The PC-IOL explantation was performed and ocular inflammation subsided. PMID:19230361

  20. Iris-claw intraocular lens implantation: Anterior chamber versus retropupillary implantation

    Science.gov (United States)

    Helvacı, Sezer; Demirdüzen, Selahaddin; Öksüz, Hüseyin

    2016-01-01

    Purpose: To compare the outcomes of anterior chamber and retropupillary implantation of iris-claw Artisan intraocular lenses (IOL). Design: Prospective, randomized, single-blinded study. Patients and Methods: Forty eyes of forty aphakic patients were enrolled. Patients were randomized into two groups. Each group includes twenty patients. Group 1 received anterior chamber Artisan IOL implantation. Group 2 received retropupillary Artisan IOL implantation. Preoperative and postoperative corrected distance visual acuity (CDVA), intraocular pressure (IOP), and all complications were noted and compared at 6 months follow-up. Results: Each two groups obtained a significant improvement in CDVA (P < 0.05). Four patients in Group 1 and five patients in Group 2 had significant but nonpermanent increase at IOP values. There were one and two pupillary irregularity in Group 1 and Group 2, respectively. In one patient, a shallow and inferior located retinal detachment were encountered in anterior chamber group. Conclusions: The results were not significantly different between the two fixation techniques for iris-claw lens. The surgery procedure is dependent to surgeon experience and eye's conditions. PMID:26953023

  1. [Iris suture fixation of posterior-chamber elastic intraocular lens in ligament apparatus laxity].

    Science.gov (United States)

    Pashtaev, N P; Bat'kov, E N; Zotov, V V

    2010-01-01

    An original MIOL-23 multifocal elastic intraocular lens (IOL) was used to operate 5 eyes with acquired lens dislocation and traumatic cataract. By making self-sealing tunnel incision, ILO was implanted into the capsular sac and sutured to the iris. MIOL-23 implantation caused an increase in mean visual acuity. The IOL took up a correct position. Elastic IOL implantation with iris suture fixation is an efficient and safe mode of additional ILO support. PMID:20645577

  2. Corneal Endothelial Cell Changes Due to Combined Phacoemulsification-Posterior Chamber Intraocular Lens Implantation and Transpupillary Silicone Oil Removal

    OpenAIRE

    Mehmet Hanifi Alp; Haluk Esgin

    2014-01-01

    Objectives: The aim of this study was to evaluate the effects of combined phacoemulsification-posterior chamber intraocular lens (PCIOL) implantation and removal of transpupillary silicone oil on the corneal endothelial cell layer. Materials and Methods: In this study, we included seven eyes of 7 patients who had intravitreal hemorrhage resulting from retinal detachment or tractional retinal detachment due to proliferative diabetic retinopathy and who underwent pars plana vitrectomy ...

  3. Successful toric intraocular lens implantation in a patient with induced cataract and astigmatism after posterior chamber toric phakic intraocular lens implantation: a case report

    Directory of Open Access Journals (Sweden)

    Kamiya Kazutaka

    2012-04-01

    Full Text Available Abstract Introduction We report the case of a patient in whom simultaneous toric phakic intraocular lens removal and phacoemulsification with toric intraocular lens implantation were beneficial for reducing pre-existing astigmatism and acquiring good visual outcomes in eyes with implantable collamer lens-induced cataract and astigmatism. Case presentation A 53-year-old woman had undergone toric implantable collamer lens implantation three years earlier. After informed consent was obtained, we performed simultaneous toric implantable collamer lens removal and phacoemulsification with toric intraocular lens implantation. Preoperatively, the manifest refraction was 0, -0.5 × 15, with an uncorrected visual acuity of 0.7 and a best spectacle-corrected visual acuity of 0.8. Postoperatively, the manifest refraction was improved to 0, -0.5 × 180, with an uncorrected visual acuity of 1.2 and a best spectacle-corrected visual acuity of 1.5. No vision-threatening complications were observed. Conclusion Toric intraocular lens implantation may be a good surgical option for the correction of spherical and cylindrical errors in eyes with implantable collamer lens-induced cataract and astigmatism.

  4. Evaluation of pars plana sclera fixation of posterior chamber intraocular lens

    Directory of Open Access Journals (Sweden)

    Fangju Han

    2014-01-01

    Full Text Available Purpose: The purpose of this study was to evaluate the clinical efficacy and safety of modified posterior chamber intraocular lens (PCIOL implantation with transscleral fixation. Design and Setting: This is a study, which is conducted at Department of Ophthalmology, Jinan Eye Hospital, Jinan Second People′s Hospital. Materials and Methods: A total of 82 patients who were scheduled for sutured PCIOL were divided randomly into modified and conventional groups. The former underwent PCIOL through pars plana fixation with knot buried and without scleral flap and the latter underwent transscleral fixation of PCIOL in the ciliary sulcus. The main outcome measures included operative time, postoperative visual acuity, and postoperative complications. Results: The mean operative time of the modified group was 39.95 ± 5.87 min, which was significantly less than that of the conventional group (45.77 ± 5.21 min; P < 0.05. No difference was found in postoperative visual acuity between the two groups. There were no significant postoperative complications, including knot exposure, endophthalmitis, and retinal detachment in either group. The optical clamping of PCIOL was prone to occur in the conventional group. Conclusion: Modified sutured PCIOL implantation is a safe, effective, and feasible technique for the correction of aphakia in eyes without adequate posterior capsular support.

  5. Iris-fixated anterior chamber phakic intraocular lens for myopia moves posteriorly with mydriasis.

    NARCIS (Netherlands)

    Cruysberg, L.P.J.; Doors, M.; Berendschot, T.T.; Brabander, J. De; Webers, C.A.; Nuijts, R.M.

    2009-01-01

    PURPOSE: To elucidate the physiological characteristics of eyes implanted with iris-fixated anterior chamber phakic intraocular lenses (pIOLs), which are increasingly being used for the correction of higher myopic and hyperopic refractive errors. METHODS: In a case series of 20 patients (39 eyes), t

  6. Primary Posterior Chamber Intraocular Lens Implantation in Traumatic Cataract With Posterior Capsule Breaks

    Institute of Scientific and Technical Information of China (English)

    YupingZou; WenhuiYang

    1995-01-01

    Background:In patients with incomplete posterior capsule support,posterior chamber intraocular lenses(PC-IOLs)were implanted with both haptics transs-cleral fixation.This causes more damage to the eye and may result in more com-plications,In patients with small posterior breaks,non-fixation or single haptic fixation may be adequate.Methods:Thiry-two consecutive patients of traumatic cataract with posterior capsule breaks caused by penetrating eye trauma were retospected.Posterior chamber intraocular lenses were implanted in all these patients with three tech-niques,ie,without fixation,with single haptic fixation and with both haptics fixation .The selection of the technique was based on the position and size of the posterior capsule.The follow-up period was 21days to 28months(mean,15.2months).Results:Intra-operative problems included ciliary body bleeding(Two patents,6.25%)and enlargement of posterior capsule breaks(2patients,6.25).Postoperative visual acuity was0.5or better(Corrected)in28case(87.5%)and 0.1-0.4in four patients(12.5%),Postoperative complications included hyphema(6eyes,18.8%),transient intraocular pressure elevation(6eyes,18.8%),transient hypotention(7eyes,21.8%).Postoperative IOL position were good except one case of IOL tilt.No pupillary capture or endophthalmitis was found.Conclusions:Not all PC-IOLs have to be fixed by two haptics.In patients with small posterior capsule breaks,PC-IOLmay not be fixed or fixed by only one haptics.Eye Science1995;11:140-142.

  7. Intraocular lens fabrication

    Energy Technology Data Exchange (ETDEWEB)

    Salazar, M.A.; Foreman, L.R.

    1997-07-08

    This invention describes a method for fabricating an intraocular lens made from clear Teflon{trademark}, Mylar{trademark}, or other thermoplastic material having a thickness of about 0.025 millimeters. These plastic materials are thermoformable and biocompatable with the human eye. The two shaped lenses are bonded together with a variety of procedures which may include thermosetting and solvent based adhesives, laser and impulse welding, and ultrasonic bonding. The fill tube, which is used to inject a refractive filling material is formed with the lens so as not to damage the lens shape. A hypodermic tube may be included inside the fill tube. 13 figs.

  8. Intraocular lens fabrication

    Energy Technology Data Exchange (ETDEWEB)

    Salazar, Mike A. (Albuquerque, NM); Foreman, Larry R. (Los Alamos, NM)

    1997-01-01

    This invention describes a method for fabricating an intraocular lens made rom clear Teflon.TM., Mylar.TM., or other thermoplastic material having a thickness of about 0.025 millimeters. These plastic materials are thermoformable and biocompatable with the human eye. The two shaped lenses are bonded together with a variety of procedures which may include thermosetting and solvent based adhesives, laser and impulse welding, and ultrasonic bonding. The fill tube, which is used to inject a refractive filling material is formed with the lens so as not to damage the lens shape. A hypodermic tube may be included inside the fill tube.

  9. Trans-scleral Fixation of Posterior Chamber Intraocular Lens Combined with Vitreoretinal Surgery

    Directory of Open Access Journals (Sweden)

    Amir Khosro Ghaseminejad

    2008-12-01

    Full Text Available

    PURPOSE: To report the outcomes of trans-scleral fixation of posterior chamber intraocular lens (PCIOL combined with complete vitrectomy and prophylactic band placement. METHODS: Hospital records of 18 patients who underwent the procedure were reviewed. Indications for vitreoretinal surgery included previous penetrating ocular trauma, complicated cataract surgery and vitreous incarceration, and chronic cystoid macular edema. All patients had iris and angle damage with inadequate lens capsular support. Age, sex, surgical technique, follow up duration and pre- and postoperative best corrected visual acuity (BCVA were evaluated. RESULTS: Overall 18 eyes of 18 patients (14 men and 4 women with mean age of 34.8±23 (range 5-76 years were operated. Mean follow up duration was 36±32.4 (range 6-96 months. Of the 18 operated eyes 7 were aphakic, 6 had complete IOL dislocation into the vitreous cavity, 4 had subluxated cataractous lens and one had a subluxated IOL. The number of eyes with BCVA ? 20/40 increased from 3 (16.7% preoperatively to 9 (50% postoperatively (P < 0.01. Postoperative complications were encountered in 9 eyes and included uveitis, vitreous hemorrhage, repeat IOL dislocation and retinal detachment. CONCLUSION: In the absence of adequate capsular support, trans-scleral fixation of a PCIOL combined with

  10. claw intraocular lens

    OpenAIRE

    Gonnermann, Johannes

    2015-01-01

    There is a wide range of alternative fixation techniques of intraocular lenses in the absence of adequate capsular support, such as angle- or iris-supported anterior chamber lenses and intra- / transsclerally-fixated (suture, fibrin glue, etc.) and iris-supported posterior chamber lenses. All procedures have different advantages and disadvantages depending on the anatomical situation and integrity of the capsular bag complex and the neighboring structures such as the iris, sclera and corneal ...

  11. Ab-interno scleral suture loop fixation with cow-hitch knot in posterior chamber intraocular lens decentration

    Directory of Open Access Journals (Sweden)

    Ertugrul Can

    2016-01-01

    Full Text Available Aim of Study: To describe a simplified ab-interno cow-hitch suture fixation technique for repositioning decentered posterior chamber intraocular lens (PC IOL. Materials and Methods: Two cases are presented with the surgical correction of decentered and subluxated IOL. Ab-interno scleral suture fixation technique with hitch-cow knot in the eye was performed with a ciliary sulcus guide instrument and 1 year follow-up was completed. Results: Both of the patients had well centered lenses postoperatively. Corrected distant and near visual acuities of the patients were improved. There was no significant postoperative complication. In the follow-up period of 1 year, no evidence of suture erosion was found. Conclusions: Ab-interno scleral suture loop fixation with hitch-cow knot in the eye was effective in repositioning decentered or subluxated PC IOLs with excellent postoperative centered lenses and visual outcomes.

  12. Ab-interno scleral suture loop fixation with cow-hitch knot in posterior chamber intraocular lens decentration

    Science.gov (United States)

    Can, Ertuğrul; Koçak, Nurullah; Yücel, Özlem Eşki; Gül, Adem; Öztürk, Hilal Eser; Sayın, Osman

    2016-01-01

    Aim of Study: To describe a simplified ab-interno cow-hitch suture fixation technique for repositioning decentered posterior chamber intraocular lens (PC IOL). Materials and Methods: Two cases are presented with the surgical correction of decentered and subluxated IOL. Ab-interno scleral suture fixation technique with hitch-cow knot in the eye was performed with a ciliary sulcus guide instrument and 1 year follow-up was completed. Results: Both of the patients had well centered lenses postoperatively. Corrected distant and near visual acuities of the patients were improved. There was no significant postoperative complication. In the follow-up period of 1 year, no evidence of suture erosion was found. Conclusions: Ab-interno scleral suture loop fixation with hitch-cow knot in the eye was effective in repositioning decentered or subluxated PC IOLs with excellent postoperative centered lenses and visual outcomes. PMID:27050346

  13. Posterior chamber collagen copolymer phakic intraocular lens with a central hole for moderate-to-high myopia

    Science.gov (United States)

    Cao, Xinfang; Wu, Weiliang; Wang, Yang; Xie, Chen; Tong, Jianping; Shen, Ye

    2016-01-01

    Abstract The purpose of this article is to evaluate the clinical outcomes of a posterior chamber phakic intraocular lens (pIOL) (Visian Implantable Collamer Lens V4c) for the correction of moderate to high myopia in Chinese eyes. The article is designed as a retrospective case series. This study included the first consecutive eyes that had implantation of a new pIOL design with a central hole, at our department by the same surgeon. The safety, efficacy, predictability, stability, and adverse events of the surgery were evaluated over 6 months. The study enrolled 63 eyes (32 patients). The mean spherical equivalent decreased from −12.81 ± 3.11 diopters (D) preoperatively to −0.05 ± 0.27 D 6 months postoperatively; 96.8% of eyes were within ±0.50 D of the target and 100% of eyes were within ±1.00 D. All eyes had a decimal uncorrected distance visual acuity of 0.5 (20/40) or better at every follow-up visit. The safety and efficacy indices were 1.42 ± 0.34 and 1.11 ± 0.19, respectively. Postoperatively, the intraocular pressure (IOP) remained stable over time. No significant rises in IOP (including pupillary block) and no secondary cataract were found. After 6 months, the mean vault was 505.2 ± 258.9 μm (range 120–990 μm), and the mean endothelial cell loss was 2.0%. Implantation of the pIOL was safe, effective, predictable, and stable in the correction of moderate-to-high myopia in Han Chinese patients, even without peripheral iridectomy. PMID:27603356

  14. Phakic Intraocular lens- a review

    OpenAIRE

    Cruz, Francisco Miguel

    2015-01-01

    Introduction: Intraocular refractive procedures with the implantation of a Phakic Intraocular lens have become a safe efficient and predictable alternative for treating high ametropias when the use of corneal photoablative procedures is not possible. The implantation of Phakic intraocular lens preservs the accomodative function,is a reversable refractive procedure, with minimal induction of higher order aberrations compaed with corneal photoablative procedures. Methods: An analytical review o...

  15. Effect of anterior chamber depth on the choice of intraocular lens calculation formula in patients with normal axial length

    Directory of Open Access Journals (Sweden)

    Mohammad Miraftab

    2014-01-01

    Full Text Available Purpose: To compare the accuracy of  Sanders-Retzlaff-Kraff II (SRK II and 3 rd and 4 th generation intraocular lens (IOL formulas and to compare the effect of different anterior chamber depths among the IOL formulas in cataract patients with normal axial length (AL; 22.0-24.5 millimeters, mm. Materials and Methods: A retrospective chart review was performed of patients with normal AL who underwent cataract surgery. The SRK II and 3 rd generation IOL formulas (Hoffer Q, SRK T, Holladay 1 were compared to the 4 th generation Haigis formula. For analysis, preoperative anterior chamber depth (ACD was divided into three subgroups: ≤3, 3-3.5, and ≥ 3.5 mm. The mean error (ME and mean absolute error (MAE of each formula was compared for each subgroup against the total. The difference between the ME and MAE of the formulas were compared for each ACD subgroup. P 0.05, all comparisons. Conclusion: The SRK II formula can predict refraction in patients with normal AL and ACD less than 3 mm with less error and is preferred over other formulas. The Haigis formula is the preferred choice in patients with a normal AL and ACD longer than 3.5 mm. The prediction accuracy of Hoffer Q, SRK T, and Holladay 1 is comparable in normal AL.

  16. Phakic anterior chamber intraocular lens (Verisyse™) implantation in children for treatment of severe ansiometropia myopia and amblyopia: Six-month pilot clincial trial and review of literature

    OpenAIRE

    Pirouzian, Amir; Ip, Kenneth C; O’Halloran, Henry S

    2009-01-01

    Purpose: The current study aims to evaluate both safety and efficacy of Verisyse™ (AMO, Irvine, CA) phakic anterior chamber intraocular lens (IOL) in the reduction of clinically significant (>−8 D) myopic anisometropia in children who are noncompliant to traditional medical treatment including spectacle correction or contact lenses. Design: Retrospective interventional case series. Methods: Six anisometropic myopic pediatric patients in one practice were identified through chart-review. None ...

  17. Audit of exracapsular cataract extraction with posterior chamber intraocular lens implantation in a tertiary eye care center in Ethiopia.

    Science.gov (United States)

    Tilahun, Yonas; Sisay, Alemayehu

    2006-01-01

    A retrospective audit of records of 370 eyes of 315 patients for whom extracapsular cataract extraction with posterior chamber intraocular lens implantation (ECCE-PC IOL) was performed between 1998 and 1999 was made to determine postoperative visual outcome and complications. One hundred and ninety three patients were males and one hundred and seventy seven were females making a male to female ratio of 1:0.9. At two months postoperatively 82 (30.4%) of eyes had uncorrected visual acuity of 6/18 or better; while 176 (53.7%) of eyes attained an uncorrected visual acuity between 6/18 and 6/60, and 31 (11.5%) had visual acuity between 3/60 and 6/60. 340 of 358 (94.9%) had a preoperative visual acuity of < 3/60. As a result of the surgery, the percentage of blind eyes dropped from 94.9% to 4.4%. The commonest intra operative and early postoperative complications encountered were posterior capsular tear with vitreous loss (5.7%) and striate keratopathy (11.1%) respectively. Posterior capsular opacity was documented in 17 (4.6%) eyes as a late postoperative complication. Routine biometry, to calculate Intra ocular Lens (IOL) power was not done and this was the major limitation of the study. In conclusion, the study increases awareness of cataract surgery outcomes and provides a feedback to achieve better results both in terms of quality and quantity in cataract surgery. Further study with biometric measurement is recommended. PMID:17447364

  18. Corneal Endothelial Cell Changes Due to Combined Phacoemulsification-Posterior Chamber Intraocular Lens Implantation and Transpupillary Silicone Oil Removal

    Directory of Open Access Journals (Sweden)

    Mehmet Hanifi Alp

    2014-12-01

    Full Text Available Objectives: The aim of this study was to evaluate the effects of combined phacoemulsification-posterior chamber intraocular lens (PCIOL implantation and removal of transpupillary silicone oil on the corneal endothelial cell layer. Materials and Methods: In this study, we included seven eyes of 7 patients who had intravitreal hemorrhage resulting from retinal detachment or tractional retinal detachment due to proliferative diabetic retinopathy and who underwent pars plana vitrectomy and silicone oil injection. Complicated cataract developed, and phacoemulsification-PC-IOL implantation combined with transpupillary silicon oil removal were performed. Preoperative and postoperative corneal endothelial cell count values were taken by Topcon SP-2000P automatic non-contact specular microscopy and were assessed by IMAGEnet 2000 Endothelial Cell Analysis. The results were compared with the findings in the literature. Results: The mean endothelial cell density (ECD was 2461 cell/mm2 preoperatively. The silicone oil removal was performed after an average of 10±3.5 months (range 5-14 months, and then endothelial cells were counted after a mean of 17±21.2 months (range 1-49 months of the combined surgery. The mean ECD was determined as 1906 cell/mm2 postoperatively. While mean endothelial cell loss was found to be 32% in two patients with diabetes mellitus, five non-diabetic patients had 19% cell loss. Corneal decompensation was not observed in any patient during the follow-up period. Conclusion: After combined phacoemulsification-PC-IOL implantation and transpupillary silicone oil removal, significant reduction in endothelial cells was observed. We detected that this reduction was greater in diabetics. (Turk J Ophthalmol 2014; 44: 424-7

  19. 21 CFR 886.3600 - Intraocular lens.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Intraocular lens. 886.3600 Section 886.3600 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES OPHTHALMIC DEVICES Prosthetic Devices § 886.3600 Intraocular lens. (a) Identification. An intraocular lens is a device made of materials...

  20. Study on Titanium Nitride Film Modified for Intraocular Lens

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    Objective:To study the characteristics of the intraocular lens using ion beam sputtering depositing titanium nitride thin film on the intraocular lens(IOLs).Methods:To deposite titanium nitride thin film on the top of intraocular lens by ion beam sputtering depositing.We analyzed the surface morphology of intraocular lens through SEM and AFM.We detected intraocular lens resolution through the measurement of intraocular lens.Biocompatibility of intraocular lens is preliminary evaluated in this test.Results:T...

  1. Opaque intraocular lens implantation

    OpenAIRE

    Yusuf IH; Patel CK

    2013-01-01

    Imran H Yusuf, CK Patel The Oxford Eye Hospital, West Wing, John Radcliffe Hospital, Headley Way, Headington, Oxford, United KingdomWe read with great interest the recent article by Lee et al,1 who described their clinical experience with three patients who underwent primary implantation of Morcher (Stuttgart, Germany) occlusive intraocular lenses (IOLs) across a variety of neuro-ophthalmic indications. We hope to offer some further insight into these clinical observations in the context of o...

  2. Phakic anterior chamber intraocular lens (Verisyse™ implantation in children for treatment of severe ansiometropia myopia and amblyopia: Six-month pilot clincial trial and review of literature

    Directory of Open Access Journals (Sweden)

    Amir Pirouzian

    2009-06-01

    Full Text Available Amir Pirouzian1,3, Kenneth C Ip2, Henry S O’Halloran31The Permanente Medical Group, Santa Clara, CA, USA; 2The Permanente Medical Group, San Francisco, CA, USA; 3Rady’s Children’s Hospital of San Diego, San Diego, CA, USAPurpose: The current study aims to evaluate both safety and efficacy of Verisyse™ (AMO, Irvine, CA phakic anterior chamber intraocular lens (IOL in the reduction of clinically significant (>-8 D myopic anisometropia in children who are noncompliant to traditional medical treatment including spectacle correction or contact lenses.Design: Retrospective interventional case series.Methods: Six anisometropic myopic pediatric patients in one practice were identified through chart-review. None of the patients were compliant with specatacle correction or contact lens wear and as a result had dense amblyopia of less than 20/400 by Snellen or Allen visual acuity (mean <20/400. All patients underwent Verisyse™ phakic IOL implantation in the more myopic eye by one surgeon (AP. Pre- and post-operative visual acuity, anterior/posterior segment examination, stereoacuity, axial biometry measurements, cycloplegic refraction, and endothelial cell counts were performed in all patients whenever feasible.Results: The age of patients ranged from 5–11 years. The mean post-operative follow-up time was six months from the time of IOL insertion. Improvement in visual acuity >6 lines was achieved in four patients (mean visual acuity of 20/70 at six months. Improvement in stereoacuity was noted in all six patients (from total mean zero seconds-arc to six-months post-operative mean of 500 seconds-arc by randot stereoacuity testing. Improvement of >2 lines of visual acuity lines was achieved in the other two patients. No patient lost any lines of visual acuity. Enhanced physical activity, coordination, and improved social interaction were noted in patients and were reported by the parents. No intra/post-operative complications were noted

  3. Phakic anterior chamber intraocular lens (Verisyse™) implantation in children for treatment of severe ansiometropia myopia and amblyopia: Six-month pilot clincial trial and review of literature

    Science.gov (United States)

    Pirouzian, Amir; Ip, Kenneth C; O’Halloran, Henry S

    2009-01-01

    Purpose: The current study aims to evaluate both safety and efficacy of Verisyse™ (AMO, Irvine, CA) phakic anterior chamber intraocular lens (IOL) in the reduction of clinically significant (>−8 D) myopic anisometropia in children who are noncompliant to traditional medical treatment including spectacle correction or contact lenses. Design: Retrospective interventional case series. Methods: Six anisometropic myopic pediatric patients in one practice were identified through chart-review. None of the patients were compliant with specatacle correction or contact lens wear and as a result had dense amblyopia of less than 20/400 by Snellen or Allen visual acuity (mean 6 lines was achieved in four patients (mean visual acuity of 20/70 at six months). Improvement in stereoacuity was noted in all six patients (from total mean zero seconds-arc to six-months post-operative mean of 500 seconds-arc by randot stereoacuity testing). Improvement of >2 lines of visual acuity lines was achieved in the other two patients. No patient lost any lines of visual acuity. Enhanced physical activity, coordination, and improved social interaction were noted in patients and were reported by the parents. No intra/post-operative complications were noted. Discussion: Irreversible or intractable amblyopia secondary to severe anisometropic myopia is a serious medical concern in the pediatric population. Failure of compliance with contact lens therapy consistently leads to visual loss. Anterior chamber phakic IOLs may provide a safe alternative in treatment of noncompliant anisometropic myopic patients who do not accept spectacle wear or contact lens therapy. Conclusion: To reduce or eliminate highly significant anisometropic myopia in children who are noncompliant with traditional medical treatment, phakic anterior chamber IOL implantation may be considered as an alternative modality of treatment. PMID:19668592

  4. Tinting of intraocular lens implants

    Energy Technology Data Exchange (ETDEWEB)

    Zigman, S.

    1982-06-01

    Intraocular lens (IOL) implants of polymethyl methacrylate (PMMA) lack an important yellow pigment useful as a filter in the visual process and in the protection of the retina from short-wavelength radiant energy. The ability to produce a yellow pigment in the PMMA used in IOL implants by exposure to near-ultraviolet (UV) light was tested. It was found that the highly cross-linked material in Copeland lens blanks was tinted slightly because of this exposure. The absorptive properties of lens blanks treated with near-UV light in this way approached that of the absorptive properties of human lenses. This finding shows that it is possible to alter IOL implants simply so as to induce a pale-yellow pigment in them to improve the visual process and to protect the retinas of IOL users.

  5. IMPLANTATION OF POSTERIOR-CHAMBER PHAKIC INTRAOCULAR LENS pIOL-3 IN HIGH MYOPIA (preliminary report

    Directory of Open Access Journals (Sweden)

    G. V. Sorokoletov

    2015-01-01

    Full Text Available Aim. To assess preliminary clinical functional outcomes of phakic intraocular lens pIOL-3 implantation in high myopia.Patients and methods. pIOL-3 was implanted in 6 patients (10 eyes aged 27‑63 with high myopia and no concomitant pathologies. Follow-up period varied from 1 to 12 months. IOL is made of hydrophilic material Contamac CI26 with water content of 26% and refraction index of 1.46. pIOL design (holes in the haptic portions provides its matching to ciliary sulcus size (0.5 mmless than linear size of the sulcus. Preoperative and postoperative examination included visual acuity measurement, biomicroscopy, ophthalmoscopy, visual field test, tonometry, endothelial microscopy, and ultrasound biomicroscopy. Simplicity of surgical technique, adaptability of haptics, and postoperative course were evaluated.Results. Early postoperative period was uncomplicated. Uncorrected (UCVA and best-corrected visual acuity (BCVA improved in the first hours after the surgery. No visual acuity worsening (as compared with preoperative BCVA was observed. Surgical procedure did not affected IOP even despite the absence of basal iridotomy. Maximum endothelial cell loss was less than 5%. No IOL forward «vaulting» was observed.Conclusions. pIOL implantation in high myopia patients is safe and provides maximum visual acuity in the first postoperative hours. Owing to its design this IOL can be implanted into ciliary sulcus (which size is0.5 mmless than IOL diameter without forward «vaulting». 

  6. Simulation of airbag impact on eyes with different axial lengths after transsclerally fixated posterior chamber intraocular lens by using finite element analysis

    Directory of Open Access Journals (Sweden)

    Huang J

    2015-02-01

    Full Text Available Jane Huang,1 Eiichi Uchio,1 Satoru Goto2 1Department of Ophthalmology, Fukuoka University School of Medicine, Fukuoka, 2Nihon ESI KK Technical Division, Tokyo, Japan Purpose: To determine the biomechanical response of an impacting airbag on eyes with different axial lengths with transsclerally fixated posterior chamber intraocular lens (PC IOL.Materials and methods: Simulations in a model human eye were performed with a computer using a finite element analysis program created by Nihon, ESI Group. The airbag was set to be deployed at five different velocities and to impact on eyes with three different axial lengths. These eyes were set to have transsclerally fixated PC IOL by a 10-0 polypropylene possessing a tensile force limit of 0.16 N according to the United States Pharmacopeia XXII.Results: The corneoscleral opening was observed at a speed of 40 m/second or more in all model eyes. Eyes with the longest axial length of 25.85 mm had the greatest extent of deformity at any given impact velocity. The impact force exceeded the tensile force of 10-0 polypropylene at an impact velocity of 60 m/second in all eyes, causing breakage of the suture. Conclusion: Eyes with transsclerally fixated PC IOL could rupture from airbag impact at high velocities. Eyes with long axial lengths experienced a greater deformity upon airbag impact due to a thinner eye wall. Further basic research on the biomechanical response for assessing eye injuries could help in developing a better airbag and in the further understanding of ocular traumas. Keywords: airbag, ocular trauma, computer simulation, transsclerally fixated posterior chamber intraocular lens, finite element analysis

  7. Intraocular lens with accommodation capacity

    OpenAIRE

    Dorronsoro, Carlos; Alejandre, Nicolás; Bekesi, Nandor; Marcos, Susana

    2014-01-01

    Intraocular lens with accommodation capacity comprising a first optical member (1) having a dynamic optical power, to which a second optical member (2) with a fixed optical power is affixed, in such a manner that at least a central part of each of one of one of the curved surfaces (2a, 2b) of the second optical member (2) and of at least one of the surfaces (1a, 1b) of the first optical member (1) are in contact with each other, the second optical member (2) and the first optical member (1) p...

  8. Posterior chamber collagen copolymer phakic intraocular lens with a central hole for moderate-to-high myopia: First experience in China.

    Science.gov (United States)

    Cao, Xinfang; Wu, Weiliang; Wang, Yang; Xie, Chen; Tong, Jianping; Shen, Ye

    2016-09-01

    The purpose of this article is to evaluate the clinical outcomes of a posterior chamber phakic intraocular lens (pIOL) (Visian Implantable Collamer Lens V4c) for the correction of moderate to high myopia in Chinese eyes.The article is designed as a retrospective case series.This study included the first consecutive eyes that had implantation of a new pIOL design with a central hole, at our department by the same surgeon. The safety, efficacy, predictability, stability, and adverse events of the surgery were evaluated over 6 months.The study enrolled 63 eyes (32 patients). The mean spherical equivalent decreased from -12.81 ± 3.11 diopters (D) preoperatively to -0.05 ± 0.27 D 6 months postoperatively; 96.8% of eyes were within ±0.50 D of the target and 100% of eyes were within ±1.00 D. All eyes had a decimal uncorrected distance visual acuity of 0.5 (20/40) or better at every follow-up visit. The safety and efficacy indices were 1.42 ± 0.34 and 1.11 ± 0.19, respectively. Postoperatively, the intraocular pressure (IOP) remained stable over time. No significant rises in IOP (including pupillary block) and no secondary cataract were found. After 6 months, the mean vault was 505.2 ± 258.9 μm (range 120-990 μm), and the mean endothelial cell loss was 2.0%.Implantation of the pIOL was safe, effective, predictable, and stable in the correction of moderate-to-high myopia in Han Chinese patients, even without peripheral iridectomy. PMID:27603356

  9. Posterior chamber collagen copolymer phakic intraocular lens with a central hole for moderate-to-high myopia: First experience in China.

    Science.gov (United States)

    Cao, Xinfang; Wu, Weiliang; Wang, Yang; Xie, Chen; Tong, Jianping; Shen, Ye

    2016-09-01

    The purpose of this article is to evaluate the clinical outcomes of a posterior chamber phakic intraocular lens (pIOL) (Visian Implantable Collamer Lens V4c) for the correction of moderate to high myopia in Chinese eyes.The article is designed as a retrospective case series.This study included the first consecutive eyes that had implantation of a new pIOL design with a central hole, at our department by the same surgeon. The safety, efficacy, predictability, stability, and adverse events of the surgery were evaluated over 6 months.The study enrolled 63 eyes (32 patients). The mean spherical equivalent decreased from -12.81 ± 3.11 diopters (D) preoperatively to -0.05 ± 0.27 D 6 months postoperatively; 96.8% of eyes were within ±0.50 D of the target and 100% of eyes were within ±1.00 D. All eyes had a decimal uncorrected distance visual acuity of 0.5 (20/40) or better at every follow-up visit. The safety and efficacy indices were 1.42 ± 0.34 and 1.11 ± 0.19, respectively. Postoperatively, the intraocular pressure (IOP) remained stable over time. No significant rises in IOP (including pupillary block) and no secondary cataract were found. After 6 months, the mean vault was 505.2 ± 258.9 μm (range 120-990 μm), and the mean endothelial cell loss was 2.0%.Implantation of the pIOL was safe, effective, predictable, and stable in the correction of moderate-to-high myopia in Han Chinese patients, even without peripheral iridectomy.

  10. Phakic anterior chamber intraocular lens (Verisyse™) implantation in children for treatment of severe ansiometropia myopia and amblyopia: Six-month pilot clincial trial and review of literature

    OpenAIRE

    Pirouzian, Amir

    2009-01-01

    Amir Pirouzian1,3, Kenneth C Ip2, Henry S O’Halloran31The Permanente Medical Group, Santa Clara, CA, USA; 2The Permanente Medical Group, San Francisco, CA, USA; 3Rady’s Children’s Hospital of San Diego, San Diego, CA, USAPurpose: The current study aims to evaluate both safety and efficacy of Verisyse™ (AMO, Irvine, CA) phakic anterior chamber intraocular lens (IOL) in the reduction of clinically significant (>-8 D) myopic anisometropia in childre...

  11. SURGICAL OUTCOME OF TRIPLE PROCEDURE AS PENETRATING KERATOPLASTY WITH EXTRACAPSULAR CATARACT EXTRACTION WITH POSTERIOR CHAMBER INTRAOCULAR LENS IMPLANTATION IN PATIENTS WITH BOTH CENTRAL CORNEAL OPACITY AND ADVANCED CATARACT AT RURAL SET UP

    OpenAIRE

    Shubhangi Nigwekar, Kishor Badhe, Neeta Misra, Surekha Bangal

    2015-01-01

    Purpose: To study the surgical outcome of triple procedure as penetrating keratoplasty (PKP) with conventional extra capsular cataract extraction (ECCE) with posterior chamber intraocular lens (PCIOL) implantation in patients with both central corneal opacity and advanced cataract at rural set up. Introduction: When corneal opacity and cataract present together then well-established and effective triple procedure is indicated. Prognosis for a clear graft is good in triple, as graft endothe...

  12. Phakic Pattern Pseudoexfoliation Material Accumulation on Intraocular Lens Surface

    Directory of Open Access Journals (Sweden)

    Emre Güler

    2014-03-01

    Full Text Available Pseudophakic pseudoexfoliation is the accumulation of pseudoexfoliation material on the intraocular lens. Most of the cases have showed scattered flecks of pseudoexfoliation material on the surface of the intraocular lens. However, the phakic pattern consisting of classic three-zone on the intraocular lens is rarely observed. In this case report, we describe a phakic pattern pseudoexfoliation material on the intraocular lens surface 8 years after cataract extraction. (Turk J Ophthalmol 2014; 44: 156-7

  13. Phakic Pattern Pseudoexfoliation Material Accumulation on Intraocular Lens Surface

    OpenAIRE

    Emre Güler; Aylin Tenlik; Tuba Kara Akyüz

    2014-01-01

    Pseudophakic pseudoexfoliation is the accumulation of pseudoexfoliation material on the intraocular lens. Most of the cases have showed scattered flecks of pseudoexfoliation material on the surface of the intraocular lens. However, the phakic pattern consisting of classic three-zone on the intraocular lens is rarely observed. In this case report, we describe a phakic pattern pseudoexfoliation material on the intraocular lens surface 8 years after cataract extraction. (Turk J Ophthalm...

  14. Misdiagnosis induced intraocular lens dislocation in anterior megalophthalmos

    Institute of Scientific and Technical Information of China (English)

    WANG Qi-wei; XU Wen; ZHU Ya-nan; LI Jin-yu; ZHANG Li; YAO Ke

    2012-01-01

    Anterior megalophthalmos (AM) is an uncommon developmental anomaly of the anterior segment of the eye with a constellation of findings that includes enlarged cornea,deep anterior chamber,posterior positioning of the iris and lens,iris stroma atrophy,hypoplasia of iris dilator,pupil displacement,large capsular bag,lens subluxation,prematurely cataract and the tendency to retinal detachment.AM,especially when symptoms are mild,is not an easy disease to diagnose.We present 3 AM cases that were misdiagnosed as congenital cataract with weak zonule and megalocornea.Intraocular lenses (IOLs) dislocated after standard cataract surgeries and subsequent surgery (replacing the dislocated IOLs with iris-claw intraocular lenses) achieved satisfactory outcome.Although rare,AM should be included in the differential diagnosis of enlarged cornea and we recommend implanting Artisan lens in AM patients.

  15. 21 CFR 886.4300 - Intraocular lens guide.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Intraocular lens guide. 886.4300 Section 886.4300 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES OPHTHALMIC DEVICES Surgical Devices § 886.4300 Intraocular lens guide. (a) Identification. An intraocular lens guide is a device...

  16. Environmental standards for intraocular lens implantation.

    Science.gov (United States)

    Crawford, B A; Kaufman, D V

    1984-02-01

    Successful implantation of prosthetic devices depends upon their freedom from postoperative inflammation and infection. Techniques and lessons learned in orthopaedic and other implant surgery should be applied to intraocular lens implantation. The avoidance of contamination by particles and micro-organisms is one essential principle of the surgical procedure. Practical steps are described to reduce both types of contamination. These measures taken together are recommended for adoption as a standard of environmental safety for lens implantation.

  17. Bilateral Pseudoexfoliation Deposits on Intraocular Lens Implants

    OpenAIRE

    Elena Bonafonte Marquez; Sergio Bonafonte Royo

    2015-01-01

    We present a rare case of bilateral pseudoexfoliative deposits on both intraocular lens (IOL) implants in an 83-year-old woman with no other associated pathology, 5 years after cataract surgery. Pseudoexfoliation syndrome is the most common cause of secondary open-angle glaucoma worldwide and these deposits are usually found on the natural lens. The fact that pseudoexfoliative deposits have been found on IOL implants implies the need for a thorough examination in pseudophakic patients, for i...

  18. Introduction to the development of intraocular lens

    Science.gov (United States)

    Li, Yifan; Peng, Runling; Hu, Shuilan; Wei, Maowei; Chen, Jiabi

    2013-08-01

    In order to cure the cataract disease or injuries in eyes, intraocular lens(IOL) has been studied all the time to replace the crystalline lens in human eyes. Researches on IOL are started early from 19th century, and it develops greatly in the hundreds years after. This article introduces several main kinds of IOLs that appear in the development history of IOL, and raises the double-liquid zoom IOL based on electrowetting, which will be the trend of IOL study.

  19. Avaliação da contaminação da câmara anterior na cirurgia de facoemulsificação com implante de lente intra-ocular Anterior chamber contamination in phacoemulsification surgery with intraocular lens implant

    Directory of Open Access Journals (Sweden)

    Cesar Nobuo Shiratori

    2002-06-01

    Full Text Available Objetivo: Avaliar a existência de contaminação da câmara anterior durante a facectomia por facoemulsificação com implante de lente intra-ocular. Método: Foi realizado estudo prospectivo, avaliando-se 30 pacientes submetidos a facectomia por facoemulsificação com implante de lente intra-ocular, colhendo-se duas amostras de humor aquoso, uma obtida no início e outra no final da cirurgia. As amostras foram semeadas em meio de cultura para germes aeróbios, anaeróbios e fungos. Resultado: Todas as amostras avaliadas resultaram negativas. Conclusão: A contaminação da câmara anterior na cirurgia de facoemulsificação com implante de lente intra-ocular, usando os cuidados necessários, é infreqüente.Purpose: To evaluate the frequency of anterior chamber contamination during phacoemulsification surgery with intraocular lens implant. Method: A prospective study was done with 30 patients submitted to phacoemulsification surgery with intraocular lens implant. Two samples of the aqueous humor were removed from the anterior chamber, one at the beginning and another one at the end of the surgery and were inoculated in culture plates for anaerobic and aerobic bacteria and fungi. Results: Intraocular aspirates yielded negative cultures. Conclusion: The absence of microorganisms in the samples evaluated allowed us to conclude that contamination during the phacoemulsification surgery with lens implant is unusual.

  20. Posterior chamber phakic intraocular lens dislocation after ocular trauma%后房型有晶状体眼人工晶状体外伤性脱位

    Institute of Scientific and Technical Information of China (English)

    赫天耕; 孙智勇; 颜华

    2014-01-01

    Objective To study the clinical features and treatment principles of posterior chamber phakic intraocular lens (PC-PIOL) dislocation after ocular trauma.Methods Eighty eyes of 42 cases had undergone PC-PIOL implantation for the correction of high myopia,in which two cases were found PC-PIOL dislocation after ocular trauma.One case who received implantable collamer lens (ICL) implantation 8 months ago was diagnosed ICL subluxation into the anterior chamber after ocular blunt trauma.Another case who received posterior chamber phakic refractive lens (PC-PRL) implantation 3 months ago was found dislocation into anterior chamber after trauma.The operations for PC-PIOL reposition were performed 1 and 3 days respectively after the trauma.The endothelial cell density (ECD) count was documented and compared.The two cases were followed-up for 6 months.Results The clinical features of PC-PIOL dislocation after ocular trauma included mild discomfort,visual acuity decrease,aqueous flare,pupil deformation and pupillary capture of IOL.The uncorrected visual acuity (UCVA) of ICL subluxation eye decreased to 0.2 after trauma,and it was recovered to 0.3 after repositionsurgery.The UCVA for PC-PRL dislocation eye decreased to 0.3 after trauma,and regained to 1.0 after reposition surgery.Neither of the two cases had best corrected visual acuity (BCVA) loss.There was no complications such as traumatic cataract occurred.The ECD count of the two cases dropped to 1941/ram2 and 1889/mm2 respectively.It continuously dropped to 1883/mm2 and 1746/mm2 at one week after the reposition surgery,but it went upward to 1911/mm2 and 1845/mm2 at 6 months postoperatively.Conclusion PC-PIOL for high myopia could be subluxated or dislocated into anterior chamber after ocular trauma,led to aqueous flare,pupil deformation and ECD loss.The immediate PC-PIOL reposition was safe and effective,and long term ECD follow-up was suggested.%目的 研究后房型有晶状体眼人工晶状体(PC-PIOL)植入术后

  1. Intraocular lens exchange-removing the optic intact

    Science.gov (United States)

    Lee, Matthew Hao; Webster, Diane Lesley

    2016-01-01

    Current practice for intraocular lens (IOL) exchange is to cut the optic of the posterior chamber intraocular lens (PCIOL) prior to removing it. Great care must be taken during this maneuver to avoid a posterior capsular tear. Removing the haptics from the fibrosed capsule can also be hazardous, as it may result in zonular stress and dehiscence. A technique is described for performing foldable (one-piece acrylic) IOL removal without cutting the optic. Careful visco-dissection of the haptics with a low viscosity ophthalmic viscosurgical device (OVD) in the fibrosed peripheral capsular tunnel avoids zonular or capsular stress. Internal wound enlargement permits foldable IOL removal in one piece, whilst preserving a self-sealing sutureless corneal wound. This technique may enhance the safety and efficacy of foldable IOL exchange. PMID:27366699

  2. Intraocular lens exchange-removing the optic intact.

    Science.gov (United States)

    Lee, Matthew Hao; Webster, Diane Lesley

    2016-01-01

    Current practice for intraocular lens (IOL) exchange is to cut the optic of the posterior chamber intraocular lens (PCIOL) prior to removing it. Great care must be taken during this maneuver to avoid a posterior capsular tear. Removing the haptics from the fibrosed capsule can also be hazardous, as it may result in zonular stress and dehiscence. A technique is described for performing foldable (one-piece acrylic) IOL removal without cutting the optic. Careful visco-dissection of the haptics with a low viscosity ophthalmic viscosurgical device (OVD) in the fibrosed peripheral capsular tunnel avoids zonular or capsular stress. Internal wound enlargement permits foldable IOL removal in one piece, whilst preserving a self-sealing sutureless corneal wound. This technique may enhance the safety and efficacy of foldable IOL exchange.

  3. Contaminação bacteriana da câmara anterior pós-facoemulsificação com implante de lente intra-ocular de polimetilmetacrilato ou silicone Bacterial anterior chamber contamination after phacoemulsification and polymethylmethacrylate or silicone intraocular lens implantation

    Directory of Open Access Journals (Sweden)

    Ricardo Antonio Pereira

    2004-12-01

    Full Text Available OBJETIVO: Avaliar a contaminação bacteriana da câmara anterior, após facoemulsificação não complicada, com tamanhos diferentes de incisões e lentes intra-oculares. MÉTODOS: Foi realizado estudo prospectivo randomizado, de 80 olhos de 80 pacientes, submetidos à facoemulsificação sob anestesia tópica, distribuídos aleatoriamente em dois grupos iguais. No grupo A foram alocados os pacientes submetidos à cirurgia com incisão de 3,0 mm, lente intra-ocular dobrável de silicone implantadas com injetor. No grupo B os pacientes foram submetidos à cirurgia com incisão de 5,8 mm e implante de lente intra-ocular de polimetilmetacrilato de peça única, com pinça. Ao final de cada cirurgia, uma amostra do líquido da câmara anterior foi colhida e semeada em meios de cultura para bactérias. RESULTADOS: A cultura do líquido da câmara anterior foi positiva em 2,5% dos casos do grupo A e em 5,0% do grupo B. Não houve diferença estatisticamente significante entre os dois grupos (chi2 = 0, 380, p> 0,05. CONCLUSÃO: O implante de lente intra-ocular através de incisão menor, não resultou em menor contaminação da câmara anterior na cirurgia de facoemulsificação.PURPOSE: To evaluate bacterial anterior chamber contamination following uncomplicated phacoemulsification with differents sizes of incisions. METHODS: Prospective randomized study, 80 eyes, 80 patients divided into two groups, were submitted to phacoemulsification with topical anaesthesia. In group A, with 40 patients, surgery was perfomed with 3.0 mm incision and silicone intraocular lens implant with injector. In group B the surgery was done with 5.8 mm incision and polymethylmethacrylate intraocular lens implant with forceps. Anterior chamber aspirate was taken for culture upon completion of surgery in each case. RESULTS: Anterior chamber cultures were positive in 2.5% of the cases in group A, and 5.0% in group B (chi-square test = 0.380, p>0.05, frequencies of

  4. Intraocular lens fixation with dacron.

    Science.gov (United States)

    Peyman, G A; Koziol, J E

    1978-10-01

    To overcome the problem of postoperative lens dislocation, we evaluated a new means of lens fixation. Our experimental studies in rabbits and primates demonstrated that Dacron polyethylene terephtalate induced a cellular reaction from either the anterior or posterior iris surface when placed in contact with the iris, thereby establishing a bond between the Dacron fibers and the iris. Dacron mesh can be attached to the distal portion of either the anterior or posterior loops of a Binkhorst iris clip (4-loop) lens. In the rabbit eye, lens fixation occurred within five days; in the primate eye, 30 days. When combined with silk, Dacron produced tissue ingrowth in the primate eye within 14 days. No unwanted reaction occurred in any animal with the Dacron and silk combination. Being biodegradable, the silk induced faster cellular ingrowth than the Dacron. However, Dacron, which is not biodegradable, provided a permanent means of fixation. PMID:155053

  5. Bilateral Pseudoexfoliation Deposits on Intraocular Lens Implants

    Directory of Open Access Journals (Sweden)

    Elena Bonafonte Marquez

    2015-01-01

    Full Text Available We present a rare case of bilateral pseudoexfoliative deposits on both intraocular lens (IOL implants in an 83-year-old woman with no other associated pathology, 5 years after cataract surgery. Pseudoexfoliation syndrome is the most common cause of secondary open-angle glaucoma worldwide and these deposits are usually found on the natural lens. The fact that pseudoexfoliative deposits have been found on IOL implants implies the need for a thorough examination in pseudophakic patients, for it could be the only sign of secondary glaucoma.

  6. Late opacification of a hydrophilic acrylic intraocular lens

    Directory of Open Access Journals (Sweden)

    Al-Bdour Muawyah

    2008-01-01

    Full Text Available Cataract extraction and intraocular lens implantation is considered to be a safe procedure in most cases. However, the new advances in the surgical technique namely phacoemulsification and hence the increased use of foldable intraocular lenses have given rise to new complications including late opacification of intraocular lenses. In this case we report late opacification of a foldable hydrophilic acrylic intraocular lens and the surgical technique for its exchange.

  7. Clinical research of phakic posterior chamber intraocular lens implantation for high myopia%有晶状体眼后房型人工晶状体植入术治疗高度近视的临床研究

    Institute of Scientific and Technical Information of China (English)

    卢苇; 邵彦; 贡雅洁

    2010-01-01

    Objective To investigate the clinical efficacy and safety of phakic posterior chamber intraocular lens (ICL) implantation for high myopia. Methods Twenty-four eyes of 12 patients with high myopia were treated with ICL implantation. The best corrected visual acuity, intraocular pressure and lens changes shape between post-operative and pre-operative were compared. Results Successful implantations were done in all patients. All eyes had a significant increase in uncorrected visual acuity. Exactly improved visual function in patients with high myopia status. The intraocular pressure was ( 14.26 ± 2.13) mm Hg(1 mm Hg = 0.133 kPa) of pre-operative , and was ( 14.79 ± 2.77) mm Hg at 1 year after post-operative, the intraocular pressure was stability after the operation. UBM showed that there was a certain gap between ICL and the lens. During the follow-up period,no complications such as cataract,chronic uveal infusion were found. Conclusion Phakic posterior chamber ICL implantation is effective,safe and reliable method for the correction of high myopia.%目的 探讨有晶状体眼后房型人工晶状体(ICL)植入术治疗高度近视的临床效果.方法 对12例24眼接受ICL植入术的患者资料进行总结和分析,比较其手术前后最佳矫正视力、眼压及透明晶状体性状的改变.结果 12例24眼术后最佳矫正视力均达到或超过术前最佳矫正视力,改善了高度近视患者的视功能状况,术前眼压(14.26±2.13)mm Hg(1 mmHg=0.133 kPa),术后1年眼压(14.79±2.77)mm Hg(P>0.05),术后眼压稳定,术后ICL与透明晶状体存在裂隙,随访期间未见并发性白内障、慢性色素膜炎等并发症.结论 ICL植入术治疗高度近视手术效果确切,预测性好,安全性高.

  8. The Experimental Study on Implantation of Intraocular Lens in Different Animals

    Institute of Scientific and Technical Information of China (English)

    WANGGui-qin; PENGXiu-jun; GUHan-qing

    2004-01-01

    To prevent the complications in cataract surgeries, the eyes of rabbits and monkeys were implanted with intraocular lens for 360 days. Methods: The eyes of the rabbits were performed with phacoemulsification and soft intraocular lens implantation. The eyes of the monkeys were performed with extracapsular cataract extraction and hard intraocular lens implantation. Results: The postoperative reactions included corneal edema, anterior chamber exudation, posterior capsule opacification and so on. The complications in the eyes of the rabbits were more than that in the eyes of the monkeys. Conclusion: The different postoperative reactions happened in different animals. In clinical the choice of the operative method and intraocular lens depended on the case in order to acquire the best sight.

  9. Intraocular Lens Calcification; a Clinicopathologic Report

    Directory of Open Access Journals (Sweden)

    Mozhgan Rezaei-Kanavi

    2009-04-01

    Full Text Available

    PURPOSE: To describe the clinical and pathological features of a case of hydrogel intraocular lens (IOL calcification. CASE REPORT: A 48-year-old man underwent explantation of a single-piece hydrophilic acrylic intraocular lens in his left eye because of decreased visual acuity and milky white opalescence of the IOL. The opacified lens was exchanged uneventfully with a hydrophobic acrylic IOL. Gross examination of the explanted IOL disclosed opacification of the optic and haptics. Full-thickness sections of the lens optic were stained with hematoxylin and eosin (H&E, von Kossa and Gram Tworts'. Microscopic examination of the sections revealed fine and diffuse basophilic granular deposits of variable size within the lens optic parallel to the lens curvature but separated from the surface by a moderately clear zone. The deposits were of high calcium content as evident by dark brown staining with von Kossa. Gram Tworts' staining disclosed no microorganisms. CONCLUSION: This report further contributes to the existing literature on hydrogel IOL calcification.

  10. Ultrasound Biomicroscopy of Iris-claw Phakic Intraocular Lens Implantation

    Institute of Scientific and Technical Information of China (English)

    Ayong Yu; Zhende Lin; Xiaoyu Cai; Xiuqi Chen; Shuke Luo; Yonghua Li

    2006-01-01

    Purpose: To study in situ the intraocular position of iris-claw phakic intraocular lens (ICPIOL) in myopic eyes using ultrasound biomicroscopy (UBM).Methods: UBM echograms of the anterior segment were taken preoperatively and 62to 115 days postoperatively in 6 eyes implanted with the Verisys ICPIOL (AMO). The echograms were assessed for the effect of the ICPIOL on iris tissue.Results: The preoperative distance between the corneal endothelium and the lens ranged from 2.96 to 3.09 mm, and the postoperative distance between the ICPIOL and the corneal endothelium, from 1.86 to 2.03 mm. The distance between the lens and the posterior surface of the ICPIOL ranged from 0.61 to 0.76 mm. The distance between the superior, inferior optic edge and the iris ranged from 0.49 to 1.00 mm,0.21 to 0.51 mm respectively. The shortest distance between the ICPIOL haptics and the angle of anterior chamber ranged from 1.25 to 1.65 mm. The indentation of iris tissue by the ICPIOL haptics without pigmentary dispersion and distortion of posterior curvature of iris was observed.Conclusion: Adequate space is maintained between the Verisyse myopic ICPIOL and the corneal endothelium, angle, and crystalline lens. Haptic indentation of the iris without pigment erosion and distortion of iris curvature is noted. The ICPIOL implanted in phakic eyes is a safe alternative for treatment of high myopia.

  11. 类风湿关节炎患者人工晶状体植入后前房反应%Anterior chamber inflammation after intraocular lens implantation in patients with rheumatoid arthritis

    Institute of Scientific and Technical Information of China (English)

    马伟华; 赵俊丽

    2013-01-01

    目的 观察类风湿关节炎患者白内障囊外摘出人工晶状体植入术(ECCE+ IOL)与超声乳化吸出人工晶状体植入术(Phaco+ IOL),比较其术后前房反应程度;探讨类风湿因子滴度与术后前房反应的关系.方法 类风湿关节炎患者11例(11眼)行ECCE+ IOL术;10例(12眼)行Phaco+ IOL术.术后复诊随访.结果 除1例(1眼)视神经萎缩,1例(1眼)老年黄斑变性外,其它均获得了0.6或以上的矫正视力,3个月后前房炎症消失,无手术并发症;行Phaco+ IOL术后前房反应较ECCE +IOL术后前房反应轻,术后3d两组间的差异具有统计学意义(mann-whitney u test分析P=0.0258).术后3d、1个月不同前房反应组的类风湿因子之间差异无统计学意义(mann-whitney utest分析,P>0.05).结论 类风湿性关节炎患者Phaco+ IOL术后前房反应较ECCE +IOL术后前房反应轻;术后前房反应的程度与术前类风湿因子滴度无关.%Objective To compare the postoperative anterior chamber inflammation between extracapsular cataract extraction with intraocular lens implantation (ECCE + IOL) and phacoemulsification with intraocular lens implantation (Phaco + IOL) on patients with rheumatoid arthritis,and to investigate the relation of rheumatoid factor and inflammation in anterior chamber.Methods The medical records of 23 eyes of 21patients with rheumatoid arthritis were reviewed,who underwent cataract extraction with intraocular lens implantation.ECCE + IOL was performed in 11 cases (11 eyes),and Phaco + IOL was performed in 10 cases (12 eyes).Patients had been followed up for 3 months.Results All the eyes,except for one case of optic atrophy and one case of age-related macular degeneration,acquired visual acuity of 0.6 or better.Inflammation in anterior chamber disappeared 3 months after surgery,and left no operative complication in any of the eyes.The inflammation in anterior chamber on patients who performed Phaco + IOL was lighter than patients who performed

  12. Coculture with intraocular lens material-activated macrophages induces an inflammatory phenotype in lens epithelial cells.

    Science.gov (United States)

    Pintwala, Robert; Postnikoff, Cameron; Molladavoodi, Sara; Gorbet, Maud

    2015-03-01

    Cataracts are the leading cause of blindness worldwide, requiring surgical implantation of an intraocular lens. Despite evidence of leukocyte ingress into the postoperative lens, few studies have investigated the leukocyte response to intraocular lens materials. A novel coculture model was developed to examine macrophage activation by hydrophilic acrylic (poly(2-hydroxyethyl methacrylate)) and hydrophobic acrylic (polymethylmethacrylate) commercial intraocular lens. The human monocytic cell line THP-1 was differentiated into macrophages and cocultured with human lens epithelial cell line (HLE-B3) with or without an intraocular lens for one, two, four, or six days. Using flow cytometry and confocal microscopy, expression of the macrophage activation marker CD54 (intercellular adhesion molecule-1) and production of reactive oxygen species via the fluorogenic probe 2',7'-dichlorodihydrofluorescein diacetate were examined in macrophages. α-Smooth muscle actin, a transdifferentiation marker, was characterized in lens epithelial cells. The poly(2-hydroxyethyl methacrylate) intraocular lens prevented adhesion but induced significant macrophage activation (p intraocular lens), while the polymethylmethacrylate intraocular lens enabled adhesion and multinucleated fusion, but induced no significant activation. Coculture with either intraocular lens increased reactive oxygen species production in macrophages after one day (p intraocular lens, with hydrophilic surfaces inducing higher activation than hydrophobic surfaces. These findings provide a new method of inquiry into uveal biocompatibility, specifically through the quantification of cell-surface markers of leukocyte activation.

  13. 有晶状体眼后房型人工晶状体植入术后前房及前房角的超声活体显微镜观察%Observation on changes of anterior chamber and chamber angle structures after posterior chamber phakic intraocular lens implantation by ultrasound biomicroscopy

    Institute of Scientific and Technical Information of China (English)

    汪晓宇; 沈晔; 杜持新; 李毓敏; 董映

    2009-01-01

    Objective To study the changes of anterior chamber and chamber angle structures after implantable contact lens (ICL) implantation in high myopia by using ultrasound biomicroscopy (UBM).Methods A prospective series case study was conducted on 15 high myopia patients (30 eyes) treated with ICL implant.These patients were followed for one year postoperatively.Intraocular pressure (IOP) was measured by Goldmann applanation tonometer after surgery.All eyes were examined by UBM one year after the surgery.Central anterior chamber depth (ACD), trabecular-iris angle (TIA), the distance between the posterior surface of ICL and the lens and the distance between peripheral surface of ICL and the lens were measured.Nonparametric test was used to compare TIA.One-way ANOVA was used to assess the distance between peripheral surface of ICL and the lens.Repeated Measure ANOVA and Bonferroni test was performed to compare the IOP level before and after surgery.Paired t-test was used to compare ACD.Results Intraocular pressure changed from (13.75±2.27) mm Hg(1 mm Hg=0.133 kPa) preoperatively to (14.27±1.70), (14.70±2.07), (14.07±2.24), (14.00±2.69) and (13.97±2.95) mm Hg at 1 week, 1,3, 6 and 12 months after the surgery, respectively.There was a statistically significant increase of the IOP one month after the surgery, which was normalized completely at 3 months after surgery.The distances between central posterior surface of the cornea to the ICL and the lens were (2.24±0.21 ) and (2.97±0.11) mm, respectively.There was significant difference between these two data (t=20.63, P30°,ICL周边部与晶状体之间的距离在钟表位12:00、3:00、6:00、9:00位差异无统计学意义.ICL后表面与晶状体之间的距离为(0.63±0.16)mm,ICL与晶状体无接触.结论 ICL植入术后ICL位于晶状体前,致使术后中央ACD变浅、部分手术眼前房角宽度变窄.ICL与晶状体无接触,与虹膜后表面接触.

  14. Ectopic intraocular lens: An unusual complication of cataract surgery

    Directory of Open Access Journals (Sweden)

    Mehul A Shah

    2014-01-01

    Full Text Available We wish to report an unusual complication of intraocular lens (IOL insertion following uneventful phacoemulsification. After successful phacoemulsification surgery, a hydrophobic acrylic IOL was loaded in the injector for insertion into the capsular bag. During insertion, the IOL inadvertently extended into the corneal stromal lamella. The complication was recognized at a late stage, and the foldable acrylic lens was retrieved and reinserted correctly in the bag. The anterior chamber was made viscoelastically taut and was maintained in this state for 10 min, followed by a routine viscoelastic wash and air bubble injection. Cornea was slightly edematous with stromal haze, and the corneal thickness was 908 μm. At the 1-month follow-up visit, the patient′s vision was 20/40, the stromal haze had subsided, the corneal thickness was 572 μm, and the patient was comfortable. Though it was unknown complication, following proper management patient recovered satisfactorily.

  15. 小切口三片式折叠人工晶状体睫状沟悬吊术疗效观察%Small-incision transscleral sulcus fixation of posterior chamber intraocular three pieces of types lens implantation

    Institute of Scientific and Technical Information of China (English)

    白华; 黄耀辉; 何涛

    2011-01-01

    Objective To study and assessment the effectiveness and feasibility of small-incision transscleral sulcus fixation with posterior chamber intraocular three pieces of types lens.Methods Forty-three patients ( 43 eyes ) with zonule abnormity or posterior capsule rupture were performed intraocular lens implantation through corneal incision, and pre-fixed with polypropylene suture followed by three pieces of type lens foldable intraocular fixed in sulcus by injector.Results The uncorrected visual acuity of all operated eyes were improved.After 1 week, there were 12 eyes in 1.0, 16 eyes in 0.6 ~ 0.8,15 eyes in 0.4 ~ 0.6, and there were 16 eyes in 1.0, 18 eyes in 0.6 ~ 0.8, 9 eyes in 0.4 ~ 0.6 after 3 months.The mean astigmatism was 1.15D ± 0.75D ( 1 week ) and 0.75D ± 0.35D ( 3 months ) respectively, with the eye pressure was ( 16 ± 3 )mmHg( 1 week ) and ( 18 ± 8 )mmHg( 3 months ), and no statistical significant compared with pre-operation( P > 0.05 ).Besides, there were no significant severely complications intra-and post-operation.Conclusion It demonstrated that the smallincision transscleral sulcus fixation with posterior chamber intraocular three pieces of types lens had less complications, small astigmatism, which proved the potential to be widely applied.%目的 探讨小切口植入三片式折叠人工晶状体,并悬吊于睫状沟的有效性和实用性.方法 选择因晶状体后囊破裂或悬韧带断裂不能正常植入后房型人工晶状体的患者43例(43只眼),利用推注器系统,通过透明角膜小切口,把襻预扎了聚丙烯缝线的三片式折叠人工晶状体植入后房,由缝线固定于睫状沟.结果 所有患者术后裸眼视力均提高,术后1周12只眼1.0,16只眼0.6~0.8,15只眼0.4~0.6;术后3个月16只眼1.0,18只眼0.6~0.8,9只眼0.4~0.6.术后1周及3个月平均散光分别为1.15D+0.75D和0.75D±0.35D,眼压分别为(16±3)mmHg和(18±8)mmHg,与术前比较均无统计学意义(P>0.05),术中

  16. 有晶状体眼后房型人工晶状体植入术治疗高度近视临床观察%Clinical Observation of Posterior Chamber Phakic Intraocular Lens Implantation for High Myopia

    Institute of Scientific and Technical Information of China (English)

    岳军; 李红; 王平; 覃光海; 赵婷; 丁熊; 郑姣; 龚晋; 简岩

    2012-01-01

    目的:评价有晶状体眼后房型人工晶状体(ICL)植入术治疗高度近视的有效性和安全性.方法:对7例(14只眼)高度近视患者行有晶状体眼ICL植入术.术后随访3-9个月,观察手术前后裸眼视力、最佳矫正视力、屈光度、眼压、内皮细胞计数等.结果:所有患者成功植入ICL,14只眼手术前后平均屈光度分别为(-14.52±-6.43)D,(-0.01±0.28)D;裸眼视力分别为0.08±0.06,0.6±0.3;最佳矫正视力分别为0.5±0.2,0.7±0.2;术后裸眼视力和最佳矫正视力均明显好于术前(P<0.05).术前平均眼压为(16.21±2.84)mmHg,术后平均眼压为(17.03±1.95)mmHg;内皮细胞计数术前为(3 028±289)个/mm2,术后为(2 912±2 51)个/mm2;前房深度术前平均为(3.69±0.31)mm,术后为(3.57±0.29)mm,差异均无统计学意义(P>0.05).结论:ICL矫正高度近视近期临床效果有效、可靠,临床观察未发现手术并发症,远期效果需进一步观察.%Objective: To evaluate the efficacy and safety of the surgical correction of high myopia using an implantation of posterior chamber intraocular lens. Methods: Posterior chamber phakic intraocular lens (ICL) implantation was performed in 14 eyes of 7 patients with high myopia. After follow-up for 3 to 9 months, the clinical ocular examinations were performed including uncorrect-ed visual acuity (UCVA), best corrected visual acuity (BCVA) retraction, intraocular pressure (IOP), slit-lamp findings, cornea topography and cornea endothelial cell density before and after surgery. Results: Posterior chamber phakic intraocular lens were implanted successfully in all the operative eyes. The mean preoperative diopter was —14. 52 ± 6. 43 D, and postoperative diopter was —0. 01±0. 28 D. The UCVA and BCVA were 0. 08 ± 0. 06 and 0. 5 ± 0. 2 respectively before operation versus 0. 6 ±0. 3 and 0. 7 ± 0. 2 respectively after operation. It is obvious that postoperative UCVA and BCVA were better than the preoperative ones

  17. Patient acceptability of the Tecnis® multifocal intraocular lens

    Directory of Open Access Journals (Sweden)

    Sood P

    2011-03-01

    Full Text Available Priyanka Sood1, Maria A Woodward21Emory Eye Center, Atlanta, GA, USA; 2Kellogg Eye Center, Ann Arbor, MI, USAAbstract: Cataract surgery has evolved. The goal of the surgeon includes both restoration of vision and refinement of vision. Patients' desire for spectacle independence has driven the market for presbyopia-correcting cataract surgery and development of novel intraocular lens (IOL designs. The Tecnis® Multifocal Intraocular Lens incorporates an aspheric, modified anterior prolate IOL with a diffractive multifocal lens design. The design aims to minimize spherical aberration and improve range of focus. The purpose of this review is to assess patient acceptability of the Tecnis® multifocal intraocular lens.Keywords: Tecnis®, intraocular lens, multifocal, presbyopia 

  18. Intraocular lens employed for cataract surgery

    International Nuclear Information System (INIS)

    The aim of this paper is to illustrate the techniques of cataract surgery with implantation of intraocular lenses and some physical properties of the used materials. The new technology, coupled with extensive experience and the studied cases, permits to increase the standardization and accuracy of the engravings, by reducing the use and handling of surgical instruments inside the eye. At present it is possible to replace the cataract with crystalline lenses based on biopolymers such as PMMA, silicone, acrylic hydrophilic and hydrophobic acrylic. These materials are increasingly able to replace the natural lens and to ensure the fully functional of the eye. The role of femtosecond lasers in cataract surgery, to assist or replace several aspects of the manual cataract surgery, are discussed.

  19. Intraocular lens employed for cataract surgery

    Science.gov (United States)

    Roszkowska, A. M.; Torrisi, L.

    2014-04-01

    The aim of this paper is to illustrate the techniques of cataract surgery with implantation of intraocular lenses and some physical properties of the used materials. The new technology, coupled with extensive experience and the studied cases, permits to increase the standardization and accuracy of the engravings, by reducing the use and handling of surgical instruments inside the eye. At present it is possible to replace the cataract with crystalline lenses based on biopolymers such as PMMA, silicone, acrylic hydrophilic and hydrophobic acrylic. These materials are increasingly able to replace the natural lens and to ensure the fully functional of the eye. The role of femtosecond lasers in cataract surgery, to assist or replace several aspects of the manual cataract surgery, are discussed.

  20. CORRECTION OF HIGH MYOPIA WITH THE WORST MYOPIA CLAW INTRAOCULAR-LENS

    NARCIS (Netherlands)

    LANDESZ, M; WORST, JGF; SIERTSEMA, JV; VANRIJ, G

    1995-01-01

    BACKGROUND: Phakic anterior chamber lenses is one of the modalities used to correct high myopia, We report the initial results of our prospective study on the Worst myopia claw intraocular lens (IOL) that is fixated to the anterior iris, METHODS: We studied 35 eyes in 18 patients with a preoperative

  1. Case of late-onset corneal decompensation after iris-fixated phakic intraocular lens implantation.

    NARCIS (Netherlands)

    Eijden, R. van; Vries, N.E. de; Cruysberg, L.P.J.; Webers, C.A.; Berenschot, T.; Nuijts, R.M.

    2009-01-01

    A 48-year-old myopic patient with bilateral anterior chamber depth of 3.1 mm and endothelial cell density (ECD) of 2525 cells/mm(2) and 2638 cells/mm(2) preoperatively had bilateral implantation of an Artisan iris-fixated phakic intraocular lens (pIOL). Five years postoperatively, unilateral corneal

  2. Intraocular lens implantation for the treatment of astigmatism%人工晶状体植入术矫正散光

    Institute of Scientific and Technical Information of China (English)

    施俊廷; 徐雯

    2013-01-01

    Refractive intraocular lens surgery can be used for the treatment of moderate and high regular astigmatism.Refractive intraocular lens surgery includes aphakic intraocular lens surgery and phakic intraocular lens surgery.In phakic intraocular lens surgery two types of intraocular lenses are used:iris-claw intraocular lens and posterior chamber intraocular lens.The purpose of this article is to review current knowledge of surgical treatments of astigmatism with a particular focus on toric implantable collamer lenses.%人工晶状体(IOL)植入术能矫正中、高度规则散光.矫正散光的IOL植入术可分为无晶状体眼及有晶状体眼的环曲面IOL植入两类,其中有晶状体眼的环曲面IOL又可分为虹膜夹持型及后房型.本文旨在介绍IOL矫正散光的手术治疗方法,并着重介绍有晶状体眼植入后房型IOL矫正屈光不正合并散光的治疗技术.

  3. Phakic posterior chamber intraocular lens implantation in high myopia with astigmatism%后房型有晶状体眼人工晶状体植入术治疗高度近视及散光

    Institute of Scientific and Technical Information of China (English)

    刘莉; 陈自新; 陈茂盛; 马金花; 陈荥培

    2011-01-01

    目的 探讨后房型有晶状体眼人工晶状体植入术治疗高度近视及散光的安全性和疗效性.方法 后房型有晶状体眼人工晶状体植人术治疗高度近视及散光22例39只眼.术前屈光度(等效球镜)为-7.0~-24.0D,平均(-14.50D±3.50)0;散光-0.50~-4.50D,平均(-2.25±1.32)D.术后检查视力、眼压、裂隙灯显微镜,前房角,前房深度,人工晶状体拱高,角膜内皮细胞计数.随访3-18个月.结果 术后3个月,38只眼视力达到或超过术前矫正视力.等效球境-0.50~-2.25D,平均(-0.75±0.38)D,散光度0.25~2.75D,平均(1.03±0.23)D,术后7只眼早期(2h后观察)眼压升高,经降眼压处理,24h内恢复正常.无一例出现青光眼、白内障、人工晶状体偏移及网脱等并发症.结论 后房型有晶状体眼人工晶状体植入术治疗高度近视及散光保留了生理性调节、并发症少、安全有效,是临床矫正高度近视散光比较理想的一种方法.%Objective To valuate the efficacy, safety stability and predictability of implanting a posterior chamber phakic intraocular lens to correct high myopia with astigmatism. Methods Thirty-nine eyes of 22 patients with high myopia were treated with ICL implantation. The range of preop-erative myopia diopters was -7.0 D to -24.0 D, mean -14.50 D±3.50 D, astigmatism ranges -0.50 D to -4.50 D, mean 2.25±1.32 D. All of 39 eyes were implanted ICL successful and had been followed up for 3 to 18 months. The follow up examination included visual acuity, refraction tonometer, slit lamp examination, chamber depth, chamber angle and space between crystal lens and IOL. Results One week after operation, the uncorrected visual acuity of 38 eyes were same or better than the pre-operative best corrected visual acuity (BCVA). The refractive diopters were from -0.50 to -2.25 D,mean -0.75±0.38 D. Astigmatism was 0.25 to 2.75 D, mean 1.03±0.23 D. Complications were seen in 7 eyes of 6 patients who had increased intraocular

  4. Pigment dispersion syndrome associated with intraocular lens implantation: a new surgical technique

    Directory of Open Access Journals (Sweden)

    M Isabel Canut Jordana

    2010-11-01

    Full Text Available M Isabel Canut Jordana1, Daniel Pérez Formigó1, Rodrigo Abreu González2, Jeroni Nadal Reus11Barraquer Ophthalmology Centre, Barcelona, Spain; 2University Hospital of La Candelaria, Tenerife, SpainAims: We report the case of a myopic patient who, after intraocular lens transplant in the posterior chamber, suffered elevated intraocular pressure due to pigment dispersion, with recurrent episodes of blurred vision. The patient was treated with a new surgical technique that can avoid potential iridolenticular contact.Methods: Complete ophthalmologic examination and optical coherence tomography (OCT of the anterior segment were performed.Results: Contact between the pigmentary epithelium and the iris with an intraocular lens was revealed by utrasound biomicroscopy and OCT. In this case, Nd:YAG laser iridotomy and laser iridoplasty were not effective for iridolenticular separation and control of the pigment dispersion. We propose a new technique: stitches on the surface of the iris to obtain good iridolenticular separation and good intraocular pressure control.Conclusion: Stitches on the iris surface should be considered as optional therapy in pigmentary glaucoma secondary to intraocular lens implantation. This surgical technique can avoid potential iridolenticular contacts more definitively.Keywords: pigmentary glaucoma, intraocular lens, optical coherence tomography, laser

  5. Application of Foldable Intraocular Lens in Multiple Types of Cataract

    Institute of Scientific and Technical Information of China (English)

    Songtao Yuan; Qinghuai Liu; Qing Jiang; Nanrong Yuan

    2002-01-01

    Objective: To evaluate the clinical results of implantation of foldable intraocular lens inmultiple types of cataract.Methods: This retrospective study comprised 162 eyes of 148 patients undergoingphacoemulsification and implantation of foldable intraocular lens, some of whom under-went combined pars plana vitrectomy or trabeculectomy or silicone oil removal. Theperiod of follow-up was from 3 months to 17 months.Results: There is slight reaction postoperatively in all cases. The postoperative uncorrectedvisual acuites was from 0. 05 to 1.2, patient with 0.6 or above acuity were 70.98%. Aneodymium: YAG capsulotomy was required in 5 eyes. Posterior capsule ruptured in 1eyes, and a PMMA intraocular lens was implanted in ciliary sulcus. In one eye, a lenswas removed because of recurrence of retina detachment.Conclusions: The application of foldable intraocular lens in multiple types of cataract issafe, and there is a slight postoperative reaction. less complications , and fast visualacuity recovery.

  6. Modified Scleral Flap Incision to Reduce Corneal Astigmatisn after Intraocular Lens Implantation

    Institute of Scientific and Technical Information of China (English)

    YizhiLiu; ShaozhenLi

    1995-01-01

    Purpose:To investigate a simple method during extracapsular cataract extraction with posteior chamber intraocular lens implantation in order to reduce surgically induced corneal astig-matism.Methods:A modified scleral flap incision was used in the extracapsular cataract extraction with intraocular lens implantation and the postoperative changes in conreal astigmatism was observed.Results:The peak value of postoperative corneal astigmatism was3.60D,and the corneal astigmatism regression was 2.11D,surgically induced astigmatism was less significant in modified scleral flap incision group than that in convention-al limbal incison group(P<0.05).Conclusions:The modified scleral flap inciston is an ideal incision for cataract ex-traction with intraocular lens implantation when phacoemulsifier is not avaliable.Eye Science1995;11:136-139.

  7. Softec HD hydrophilic acrylic intraocular lens: biocompatibility and precision

    OpenAIRE

    Ladan Espandar; Shameema Sikder; Majid Moshirfar

    2011-01-01

    Ladan Espandar1, Shameema Sikder2, Majid Moshirfar31Department of Ophthalmology, Tulane University, New Orleans, LA, USA; 2Wilmer Eye Institute, Johns Hopkins University, Baltimore, MD, USA; 3John A Moran Eye Center, University of Utah, Salt Lake City, UT, USAAbstract: Intraocular lens development is driven by higher patient expectations for ideal visual outcomes. The recently US Food and Drug Administration-approved Softec HD™ lens is an aspheric, hydrophilic acrylic intraocular le...

  8. Patient acceptability of the Tecnis® multifocal intraocular lens

    OpenAIRE

    Woodward, Maria; Sood,Priyanka

    2011-01-01

    Priyanka Sood1, Maria A Woodward21Emory Eye Center, Atlanta, GA, USA; 2Kellogg Eye Center, Ann Arbor, MI, USAAbstract: Cataract surgery has evolved. The goal of the surgeon includes both restoration of vision and refinement of vision. Patients' desire for spectacle independence has driven the market for presbyopia-correcting cataract surgery and development of novel intraocular lens (IOL) designs. The Tecnis® Multifocal Intraocular Lens incorporates an aspheric, modified anter...

  9. Long-Term Comparison of Posterior Chamber Phakic Intraocular Lens With and Without a Central Hole (Hole ICL and Conventional ICL) Implantation for Moderate to High Myopia and Myopic Astigmatism

    Science.gov (United States)

    Shimizu, Kimiya; Kamiya, Kazutaka; Igarashi, Akihito; Kobashi, Hidenaga

    2016-01-01

    Abstract The study shows a promising next-generation surgical option for the correction of moderate to high ametropia. Hole implantable collamer lens (ICL), STAAR Surgical, is a posterior chamber phakic intraocular lens with a central artificial hole. As yet, however, no long-term comparison of the clinical results of the implantation of ICLs with and without such a hole has hitherto been conducted. A prospective, randomized, controlled trial was carried out in order to compare the long-term clinical outcomes of the implantation, in such eyes, of ICLs with and without a central artificial hole. Examinations were conducted of the 64 eyes of 32 consecutive patients with spherical equivalents of −7.53 ± 2.39 diopters (D) (mean ± standard deviation) in whom implantation of a Hole ICL was performed in 1 eye, and that of a conventional ICL was carried out in the other, by randomized assignment. Before 1, 3, and 6 months, and 1, 3, and 5 years after surgery, the safety, efficacy, predictability, stability, intraocular pressure, endothelial cell density, and adverse events of the 2 surgical techniques were assessed and compared over time. The measurements of LogMAR uncorrected and corrected distance visual acuity 5 years postoperatively were −0.17 ± 0.14 and −0.24 ± 0.08 in the Hole ICL group, and −0.16 ± 0.10 and −0.25 ± 0.08 in the conventional ICL group. In these 2 groups, 96% and 100% of eyes, respectively, were within 1.0 D of the targeted correction 5 years postoperatively. Manifest refraction changed by −0.17 ± 0.41 D and −0.10 ± 0.26 D occurred in from 1 month to 5 years in the Hole and conventional ICL groups, respectively. Only 1 eye (3.1%), which was in the conventional ICL group, developed an asymptomatic anterior subcapsular cataract. Both Hole and conventional ICLs corrected of ametropia successfully throughout the 5-year observation period. It appears likely that the presence of the central hole does not

  10. Bionic intraocular lens with variable focus and integrated structure

    Science.gov (United States)

    Liang, Dan; Wang, Xuan-Yin; Du, Jia-Wei; Xiang, Ke

    2015-10-01

    This paper proposes a bionic accommodating intraocular lens (IOL) for ophthalmic surgery. The designed lens has a solid-liquid mixed integrated structure, which mainly consists of a support ring, elastic membrane, rigid lens, and optical liquid. The lens focus can be adjusted through the deformation of the lens front surface when compressed. The integrated structure of the IOL is presented, as well as a detailed description of the lens materials and fabrication process. Images under different radial pressures are captured, and the lens deformation process, accommodating range, density, and optical property are analyzed. The designed lens achieves a 14.6 D accommodating range under a radial pressure of 51.4 mN and a 0.24 mm alteration of the lens outer radius. The deformation property of the lens matches well with the characteristic of the eye and shows the potential to help patients fully recover their vision accommodation ability after the cataract surgery.

  11. 有晶体眼后房型人工晶体植入治疗高度近视及散光%Clinical research of the implantation of phakic posterior chamber intraocular lens (ICL) for high myopia with astigmatism

    Institute of Scientific and Technical Information of China (English)

    廖荣丰; 汪永; 周艳峰; 刘伦; 刘兴华; 封利霞

    2009-01-01

    目的 观察和探讨后房型有晶体眼人工晶体植入术治疗高度近视及散光的效果及安全性.方法 后房型有晶体眼人工晶体植入术治疗高度近视及散光28例56眼.术前屈光度(等效球镜)为-7.0~-22.50D,平均(-12.42±3.50)D.散光0.37~6.5D,平均(1.92±1.32)D.所有患者随访3~24个月.术后检查视力、眼压,裂隙灯检查眼前部情况.结果 术后3个月,所有病例术后达到或超过术前最佳矫正视力.等值球镜,0.25~1.50D,平均(0.534±0.408)D.散光度0.25~1.50D,平均(0.564±0.289)D.术后并发症:4例7眼术后早期眼压升高,经降眼甩治疗,3~4天后眼压正常.结论 后房型有晶体眼人工晶体植入术治疗高度近视及散光效果确切,预测性好,手术安全.高度近视,尤其是超高度近视以及角膜薄不适合准分子激光矫正的患者是理想的治疗对象.%Objective To observe and investigate the efficacy and safety of the implantation of phakic posterior chamber intraocular lens (ICL) for high myopia with or without astigmatism. Methods 56 eyes of 28 patients with high myopia were treated with ICL implanta-tion. The range of preoperative myopia diopters was-7.0 to-22. 5D, mean-12.42±3.50 D. Astigmatism ranges 0.37 to 6.5D, mean 1.92±1.32D. All of 56 eyes were implanted ICL successfully and have been followed up for 3 to 24 months. The follow up examination included visual acu-ity, refraction, tonometer, slit lamp examination ,and space between crystal lens and IOL. Results Three months after operation, the uncor-rected visual acuity of every eye was same or better than the pre-operative best corrected visual acuity (BCVA). The refractive diopters were from 0.25 to 1.50D, mean 0.534±0.408D. Astigmatism were 0.25 to 1.50D, mean 0.564±0.289D.complications were secondary glaucoma. 7 eyes of 4 patients had increased intraocular pressure shortly after surgery. After treatment, the intraocular pressure became normal in 3 to 4 days. Con

  12. Comparison of shape recovery ratios in various intraocular lens haptics.

    Science.gov (United States)

    Kimura, W; Kimura, T; Sawada, T; Kikuchi, T; Toda, H; Yamada, Y; Nagai, H

    1992-11-01

    Since understanding the mechanical properties of intraocular lens (IOL) haptic materials can minimize decentration after surgery, we have examined shape recovery ratios of various intraocular lens haptics (polypropylene [PP], polyvinylidene fluoride [PVDF], extruded poly(methyl methacrylate) [PMMA]) currently on the market under conditions that approximate clinical use. The results using various Ascon lens-holding forceps and compression tests, during which the lenses were held in a cylindrical holder for seven days, one month, and three months, indicated that PVDF haptics had better shape recovery capability than PP and extruded three-piece PMMA haptics.

  13. Changes of Anterior Chamber Angle and Intraocular Pressure after Implantation of Intraocular Lens through Small Incision in a Non-phacoemulsification Way%小切口非超声乳化人工晶状体植入术后房角及眼压变化的相关性研究

    Institute of Scientific and Technical Information of China (English)

    刘玉青; 冀向宁; 李坤; 戴冬姝

    2012-01-01

    Objective To explore the correlation between the anterior chamber angle and intraocular pressure after the implantation of intraocular lens ( iol) through small incision in a non - phacoemulsification way. Methods Totally 110 senile cataract patients admitted to our hospital in 2010 underwent implantation of iol with superficial anaesthesia through small incision. Among whom we chose 101 senile cataract patients ( 104 eyes ) as the research subjects whose operation process was smooth and the posterior capsulars remained complete and iol successfully being implanted into capsular bag. Relevant parameters of anterior chamber including anterior open distance at 500μm ( AOD500 ), trabeculum - tunica coerulea included angle ( TIA ), anterior chamber depth ( ACD ) were measured by ultrasonic biomicroscope ( UBM ) preoperatively. Intraocular pressures were measured by Goldmann ophthalmotonometer. All these parameters were re - measured by the same technician 2 weeks, 1 month, and 3 months postoperatively. Morphouses of the anterior chambers were recorded preoperatively and re - recorded 1 month postopera-tively through microgonioscope. Results Compared with the normal eyes, the intraocular pressure showed significant difference in these diseased eyes before surgery ( P < 0. 05 ). ACD, AOD 500, TIA, and intraocular pressure before surgery were also significantly different from thoese 2 weeks, 1 month, and 3 months after surgery ( P < 0. 05 ). In addition, AOD 500 and TIA had a negative correlation with intraocular pressure. Conclusion Small incision of non - phacoemulsification and intraocular lens ( iol) implantation might result in an enlargement of ACD and width of anterior chamber and a significant decrease of intraocular pressure. AOD500 and TIA are important factors that influence the intraocular pressure in the elderly.%目的 研究小切口非超声乳化人工晶状体植入术后前房角宽度及眼压变化的相关性.方法 选取2010年在我院就

  14. New trends in intraocular lens imaging

    Science.gov (United States)

    Millán, María S.; Alba-Bueno, Francisco; Vega, Fidel

    2011-08-01

    As a result of modern technological advances, cataract surgery can be seen as not only a rehabilitative operation, but a customized procedure to compensate for important sources of image degradation in the visual system of a patient, such as defocus and some aberrations. With the development of new materials, instruments and surgical techniques in ophthalmology, great progress has been achieved in the imaging capability of a pseudophakic eye implanted with an intraocular lens (IOL). From the very beginning, optical design has played an essential role in this progress. New IOL designs need, on the one hand, theoretical eye models able to predict optical imaging performance and on the other hand, testing methods, verification through in vitro and in vivo measurements, and clinical validation. The implant of an IOL requires a precise biometry of the eye, a prior calculation from physiological data, and an accurate position inside the eye. Otherwise, the effects of IOL calculation errors or misplacements degrade the image very quickly. The incorporation of wavefront aberrometry into clinical ophthalmology practice has motivated new designs of IOLs to compensate for high order aberrations in some extent. Thus, for instance, IOLs with an aspheric design have the potential to improve optical performance and contrast sensitivity by reducing the positive spherical aberration of human cornea. Monofocal IOLs cause a complete loss of accommodation that requires further correction for either distance or near vision. Multifocal IOLs address this limitation using the principle of simultaneous vision. Some multifocal IOLs include a diffractive zone that covers the aperture in part or totally. Reduced image contrast and undesired visual phenomena, such as halos and glare, have been associated to the performance of multifocal IOLs. Based on a different principle, accommodating IOLs rely on the effort of the ciliary body to increase the effective power of the optical system of the

  15. Anterior Chamber Iris Claw Lens for the Treatment of Aphakia in a Patient with Megalocornea

    Science.gov (United States)

    Saffra, Norman; Rakhamimov, Aleksandr; Masini, Robert; Rosenthal, Kenneth J.

    2015-01-01

    Megalocornea in isolation is a rare congenital enlargement of the cornea greater than 13 mm in diameter. Patients with megalocornea are prone to cataract formation, crystalline lens subluxation, zonular deficiencies and dislocation of the posterior chamber intraocular lens (PCIOL) within the capsular bag. A 55-year-old male with megalocornea in isolation developed subluxation of the capsular bag and PCIOL. The PCIOL and capsular bag were explanted, and the patient was subsequently implanted with an anterior chamber iris claw lens. An anterior chamber iris claw lens is an effective option for the correction of aphakia in patients with megalocornea. PMID:26120314

  16. SURGICAL OUTCOME OF TRIPLE PROCEDURE AS PENETRATING KERATOPLASTY WITH EXTRACAPSULAR CATARACT EXTRACTION WITH POSTERIOR CHAMBER INTRAOCULAR LENS IMPLANTATION IN PATIENTS WITH BOTH CENTRAL CORNEAL OPACITY AND ADVANCED CATARACT AT RURAL SET UP

    Directory of Open Access Journals (Sweden)

    Shubhangi Nigwekar, Kishor Badhe, Neeta Misra, Surekha Bangal

    2015-10-01

    Full Text Available Purpose: To study the surgical outcome of triple procedure as penetrating keratoplasty (PKP with conventional extra capsular cataract extraction (ECCE with posterior chamber intraocular lens (PCIOL implantation in patients with both central corneal opacity and advanced cataract at rural set up. Introduction: When corneal opacity and cataract present together then well-established and effective triple procedure is indicated. Prognosis for a clear graft is good in triple, as graft endothelium does not touch the hard nucleus which may occur in two steps or sequential surgery. It provides faster visual rehabilitation. Being single step procedure it reduces patient’s hospital stay, postoperative care and follows up visits. Methodology: In this hospital based observational , three years longitudinal study, we studied the surgical outcome of relatively rare one step triple procedure as PKP with conventional ECCE with PCIOL implantation in sulcus or in bag, in patients with both central corneal opacity and advanced cataract at rural set up. The outcome measures included graft clarity on slit lamp, postoperative unaided visual acuity with Snellen’s chart and the occurrence of postoperative complications after taking IEC permission and informed written consent in local language from study patients. Results: Out of 13 study patients mean age was 61.15yrs (Range50-80yrs. Follow up range was 9-34 months. At final follow up 9 patients (69.23% had clear grafts and 61.52% patients gained visual acuity >6/24. Graft failure was the most common post operative complication in 30.76% followed by Posterior capsular opacification (PCO in 15.38% patients which was treated well with YAG laser capsulotomy. Conclusion: Triple procedure gives good results in respect to graft clarity, unaided vision, and faster rehabilitation.

  17. Experimental study for dynamic immunity after the implantion of posterior chamber intraocular lens in rabbit eyes%兔眼后房型人工晶体植入术后动态免疫的实验研究

    Institute of Scientific and Technical Information of China (English)

    杜耀武; 单季先; 刘英杰; 柴立辉

    2003-01-01

    目的:研究兔眼后房型人工晶体植入(Posterior chamber intraocular lens,PC-IOL)术后体液免疫反应(HI)的变化,探讨人工晶体与体液免疫反应变化及术后炎症反应的关系.方法:家兔48只,随机分为A、B 2组,每组24只.A组行右眼透明晶体超声乳化吸除及人工晶体植入,B组行右眼透明晶体超声乳化吸除.分别在术前及术后第7d、14d、21d、28d、35d采血测定IgG、IgM、CH50、C3、Circalating immune complex(CIC),并观察临床指征--睫状充血、房水浑浊程度的变化.结果:A、B 2组术后IgG、IgM、CIC均升高,2组间无显著性差异(P>0.05).CH50、C3均降低,2组间也无显著性差异(P>0.05).A组术后眼内反应明显较B组重,差异非常显著(P<0.01).结论:人工晶体(PMMA)具有较好的稳定性,眼内植入安全.术后早期眼内炎症主要是由人工晶体异物性刺激及手术机械性损伤引起,HI的变化可能与迟发性葡萄膜炎有关.

  18. 有晶状体眼后房型人工晶状体植入术治疗高度近视术后UBM观察%Ultrasound biomicroscopy examination of posterior chamber phakic intraocular lens for high myopia

    Institute of Scientific and Technical Information of China (English)

    马波; 陈莉; 王从毅; 杨新光

    2011-01-01

    Objective To observe the position of posterior chamber phakic intraocular lens and its relationship to the iris and the crystalline in vivo through UBM. Methods There were 33 eyes with high myopia who accepted surgery treatment All surgeries were performed using topical anesthesia and clear corneal incision. The posterior chamber phakic intraocular lens manufactured with STAAR collamer was implanted between transparent lens and iris. During the course of the surgery, iridectomy was done at one clock. Each eye was examined carefully before and after surgery. The position of ICL was observed at 1, 3 and 6 months. Result All eyes of preoperative uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA)were 0.04± 0.06, 0.5± 0.3 respectively and postoperative were 0.5± 0.2, 0.8± 0.2 respectively. At sixth month of postoperative the anterior chamber depth was 2802± 297 m and ICL central vault was 329 m. UBM verified the contact between ICL and iris. Both haptics were supported by zonula in 22 eyes; one haptic was supported by zonula and other haptic by ciliary body in 7 eyes; Both haptics were supported by ciliary body in 4eyes. The extreme tip of two haptic was at sulcus in 20 eyes. In 6 eyes, rotation of the lens was observed. Conelusions Thephakic IOLs are a safety and effective treatment for the correction of high myopia. It is important that looking for a new and accurate method to measure sulcus diameter in order to reduce complication resulted by inaccurate ICL vault.%目的 通过UBM在活体状态下观察有晶状体眼后房型人工晶状体(posterior chamber phakic intraocularlens,PCPIOL)植入术后PCPIOL与虹膜、睫状体和晶状体的位置的关系及变化.方法 取高度近视患者33只眼接受有晶状体眼后房型人工晶状体植入及术后检查,手术在表面麻醉下进行,作透明角膜隧道式切口,可植入式接触镜(implantablecontactlens,ICL)置于透明晶状体与虹膜之间,术中1点位作虹膜周

  19. Microscopic and spectroscopic investigation of an explanted opacified intraocular lens

    Energy Technology Data Exchange (ETDEWEB)

    Simon, V., E-mail: viosimon@phys.ubbcluj.ro [Babeş-Bolyai University, Faculty of Physics and Interdisciplinary Research Institute on Bio-Nano-Sciences, 400084 Cluj-Napoca (Romania); Radu, T.; Vulpoi, A. [Babeş-Bolyai University, Faculty of Physics and Interdisciplinary Research Institute on Bio-Nano-Sciences, 400084 Cluj-Napoca (Romania); Rosca, C. [Optilens Clinic of Ophthalmology, 400604 Cluj-Napoca (Romania); Eniu, D. [Iuliu Haţieganu University of Medicine and Pharmacy, Department of Molecular Sciences, 400349 Cluj-Napoca (Romania)

    2015-01-15

    Highlights: • Changes on intraocular lens (IOL) surface after implantation. • Partial opacification of IOL central area. • Elemental composition on IOL surface prior to and after implantation. • First XPS depth profiling examination of the opacifying deposits. • Cell-mediated hydroxyapatite structuring. - Abstract: The investigated polymethylmethacrylate intraocular lens explanted an year after implantation presented a fine granularity consisting of ring-like grains of about 15 μm in diameter. In order to evidence the changes occurred on intraocular lens relative to morphology, elemental composition and atomic environments, microscopic and spectroscopic analyses were carried out using scanning electron microscopy (SEM), Fourier transform infrared (FTIR), energy-dispersive X-ray (EDS), and X-ray photoelectron (XPS) spectroscopies. The results revealed that the grains contain hydroxyapatite mineral phase. A protein layer covers the lens both in opacified and transparent zones. The amide II band is like in basal epithelial cells. The shape and size of the grains, and the XPS depth profiling results indicate the possibility of a cell-mediated process involving lens epithelial cells which fagocitated apoptotic epithelial cells, and in which the debris derived from cell necrosis were calcified. To the best of our knowledge, this is the first investigation on explanted intraocular lenses using XPS depth profiling in order to examine the inside of the opacifying deposits.

  20. Surgical management of spontaneous in-the-bag intraocular lens and capsular tension ring complex dislocation

    Directory of Open Access Journals (Sweden)

    Uzeyir Gunenc

    2014-01-01

    Full Text Available We describe a technique to manage late spontaneous intraocular lens (IOL and capsular tension ring (CTR dislocation within the intact capsular bag. The subluxated IOL and CTR complex can be positioned in a closed chamber and fixed to the pars plana at both 3 and 9 o′clock quadrants with the presented ab externo direct scleral suturation technique which provides an easy, safe and effective surgical option for such cases.

  1. 后房型有晶状体眼人工晶状体植入术治疗高度近视%Posterior chamber phakic intraocular lens implants for high myopia

    Institute of Scientific and Technical Information of China (English)

    罗岩; 胡六梅; 徐婧; 李莹

    2012-01-01

    目的 评价后房型有晶状体眼人工晶状体(ICL)植入术治疗高度近视术后1年的有效性和安全性.方法 回顾性病例研究.高度近视患者149例(290眼)接受ICL植入手术.其中男107眼,女183眼,平均年龄(29.0±6.5)岁.术前平均等效球镜度(-13.2±5.6)D.随诊时检查视力、眼压、屈光度和其他副作用.结果 所有眼睛的术后裸眼视力都有提高,接近术前最佳矫正视力.最后一次随访时199眼(68.6%)术后裸眼视力高于术前最佳矫正视力1行以上,无最佳矫正视力下降的病例.术后3 h内32眼眼压超过35 mmHg,其中13眼为瞳孔阻滞,19眼考虑为黏弹剂残留.术后随诊时发现3眼眼压在21~25 mmHg之间.2眼术后3个月以后发生黄斑区出血,3个月后出血吸收.3眼(2例)因为术后光晕干扰视物不适而取出ICL.12眼因为术后拱高欠佳而进行了人工晶状体置换术.结论 随诊1年显示ICL植入治疗高度近视是一种安全、有效而并发症少的治疗方法.%Objective To evaluate the efficacy,safety,and biocompatibility of a posterior chamber phakic intraocular lens (PCPIOL) to correct high myopia within 1 year.Methods In a retrospective case series study,an implantable intraocular lens was implanted in 290 eyes of 149 patients with a mean age of 29.0±6.5 years (range 20 to 49 years).There were 107 eyes from males and 183 eyes from females.Mean preoperative myopia was-13.2±5.6 D (range-6.0 to-32.0 D).The follow-up included tests for visual acuity,intraocular pressure,manifest refraction,and adverse reactions.Results Postoperatively,all eyes had a significant increase in uncorrected visual acuity (UCVA).Best corrected visual acuity (BCVA) had improved by 1 or more lines in 199 eyes (68.6%)at 1 year.No eye lost BCVA.Thirty-two eyes developed intraocular pressure (IOP) more than 35 mmHg within 3 hours after the implatation.Pupillary blockage caused an increase in IOP in 13 eyes and insufficient removal of viscoelastic

  2. 有晶状体眼后房型人工晶状体植入术治疗高度近视效果观察%Phakic posterior chamber intraocular lens for high myopia

    Institute of Scientific and Technical Information of China (English)

    陈莉; 马波; 王从毅

    2010-01-01

    Objective To evaluate the efficacy and safety of the surgical correction of high myopia using a phakic posterior chamber intraocular lens (PCPIOL).Methods Thirty-four eyes of 18 patients with high myopia who accepted surgery treatment.Each eye was examined before and after surgery.The examination included visual acuity,refraction,tonometry,kerameter,pachometer,anterior chamber depth,horizontal corneal diameter (white to white),and posterior segment evaluation after indirect ophthalmolscope examination.All surgeries were performed using topical anesthesia and clear corneal incision.The posterior chamber phakic intraocular lens manufactured with STAAR collamer was implanted between transparent lens and iris.Results All eyes of preoperative uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA) were 0.08±0.06,0.5±0.3 respectively and postoperative were 0.5±0.2,0.7±0.2 respectively.The mean preoperative SE was -19.9±5.4D and postoperative SE was -1.5±1.5D.The mean preoperative ECD was 3249.6±337.1/mm~2 and postoperative ECD was 3103.4±305.5/mm~2 and the percentage of loss was 4.5%.The mean preoperative IOP was 15.5±2.7 mmHg and postoperative IOP at first day was 19.4±7.3 mmHg.UBM showed that preoperative ACD was 3.20±0.30 mm and postoperative ACD reduced 2.99±0.19 mm.Conclusions The phakic IOLs were an effective treatment for the correction of high myopia and have significant advantages such as reversibility,immediate correction,stability,and relative simplicity.However,long-term studies are necessary to assess the potential risks.%目的 评价有晶状体眼后房型人工晶状体植入术治疗高度近视的安全性和有效性.方法 高度近视患者18例(34只眼)接受有晶状体眼后房型人工晶状体植入,每只眼术前及术后进行眼部检查,包括:裸眼视力、矫正视力、睫状肌麻痹验光、角膜曲率、裂隙灯检查、眼压测量、角膜地形图、角膜厚度、角膜内皮细胞计数、UBM

  3. 超声生物显微镜观察弹性开放襻前房型人工晶状体对眼前段结构的影响%The influence of flexible open-loop anterior chamber intraocular lens on the structure of ocular anterior segment

    Institute of Scientific and Technical Information of China (English)

    陈伟蓉; 刘奕志; 陈秀琦; 程冰; 刘玉华

    2001-01-01

    Objective To evaluate the therapeutic effects and safety offlexible open-loop anterior chamber intraocular lens (FOAC-IOL). Methods By ultrasound biomicroscopy, the positions of the haptics of FOAC-IOL in 20 patients (20 eyes) and the relationships of the haptics with iris and anterior chamber angle structures were observed postoperatively to evaluate the impact of these lenses on the structures of ocular anterior segment. Follow-up duration was from 6 to 20 months. Results Among 40 IOL′s haptics, twenty-six haptics were fixed at the recess of the chamber angle ;and other fourteen haptics penetrated the iris and invaded into the ciliary stroma, which caused recurrent uveitis. There was 1 eye with eccentric lens. There were 8 eyes with anterior synechiae of iris, which were related to the haptics of intraocular lens. Conclusions Ultrasound biomicroscopy works well in dynamic observation of the influence of intraocular lens on ocular anterior segment. The haptics of flexible open-loop anterior chamber intraocular lens should be modified.%目的 评价弹性开放襻一体型前房型人工晶状体(anterchamberintraocularlens,AC-IOL)植入术的疗效及其安全性。方法 应用超声生物显微镜观察20例(20只眼)弹性开放襻一体型AC-IOL植入术后患者IOL襻的位置,以及其与虹膜及房角结构的关系,从而评价IOL对眼前段结构的影响。随访时间6~20个月。结果 40个IOL襻中,26个襻固定于房角隐窝;14个襻(8只眼)穿过虹膜侵入至睫状体实质内,并伴有反复发作的葡萄膜炎。术后8只眼虹膜前粘连与IOL襻有关。结论超声生物显微镜检查是动态了解IOL对眼前段结构影响的有效方法。AC-IOL襻的设计有待进一步改进。

  4. [Intraocular Pressure Sensor Based on a Contact Lens].

    Science.gov (United States)

    Guo, Xuhong; Pet, Weihua; Yao, Zhaolin; Chen, Yuanfang; Hu, Xiaohui; Chen, Hongda; Zhu, Jingyuan; Wu, Huijuan

    2016-02-01

    Intraocular pressure detection has a great significance for understanding the status of eye health, prevention and treatment of diseases such as glaucoma. Traditional intraocular pressure detection needs to be held in the hospital. It is not only time-consuming to doctors and patients, but also difficult to achieve 24 hour-continuous detection. Microminiaturization of the intraocular pressure sensor and wearing it as a contact lens, which is convenient, comfortable and noninvasive, can solve this problem because the soft contact lens with an embedded micro fabricated strain gauge allows the measurement of changes in corneal curvature to correlate to variations of intraocular pressure. We fabricated a strain gauge using micro-electron mechanical systems, and integrated with the contact lens made of polydimethylsiloxane (PDMS) using injection molding. The experimental results showed that the sensitivity was 100. 7 µV/µm. When attached to the corneal surface, the average sensitivity of sensor response of intraocular pressure can be 125.8 µV/mm Hg under the ideal condition. PMID:27382734

  5. [Intraocular Pressure Sensor Based on a Contact Lens].

    Science.gov (United States)

    Guo, Xuhong; Pet, Weihua; Yao, Zhaolin; Chen, Yuanfang; Hu, Xiaohui; Chen, Hongda; Zhu, Jingyuan; Wu, Huijuan

    2016-02-01

    Intraocular pressure detection has a great significance for understanding the status of eye health, prevention and treatment of diseases such as glaucoma. Traditional intraocular pressure detection needs to be held in the hospital. It is not only time-consuming to doctors and patients, but also difficult to achieve 24 hour-continuous detection. Microminiaturization of the intraocular pressure sensor and wearing it as a contact lens, which is convenient, comfortable and noninvasive, can solve this problem because the soft contact lens with an embedded micro fabricated strain gauge allows the measurement of changes in corneal curvature to correlate to variations of intraocular pressure. We fabricated a strain gauge using micro-electron mechanical systems, and integrated with the contact lens made of polydimethylsiloxane (PDMS) using injection molding. The experimental results showed that the sensitivity was 100. 7 µV/µm. When attached to the corneal surface, the average sensitivity of sensor response of intraocular pressure can be 125.8 µV/mm Hg under the ideal condition.

  6. Combined aniridic intraocular lens implantation and vitreoretinal surgery

    Science.gov (United States)

    Mehta, Hijab; Jayadev, Chaitra; Natarajan, S

    2007-01-01

    A 45-year-old man presented with post-traumatic aniridia. We describe the combined surgery done to treat both aniridia and epiretinal membrane simultaneously. A combined aniridia intraocular lens and vitreoretinal surgery was done. The case report highlights the advantage of combined surgery in terms of cost factor and surgical time. PMID:17699956

  7. Combined aniridic intraocular lens implantation and vitreoretinal surgery

    OpenAIRE

    Mehta Hitendra; Mehta Hijab; Jayadev Chaitra; Natarajan S

    2007-01-01

    A 45-year-old man presented with post-traumatic aniridia. We describe the combined surgery done to treat both aniridia and epiretinal membrane simultaneously. A combined aniridia intraocular lens and vitreoretinal surgery was done. The case report highlights the advantage of combined surgery in terms of cost factor and surgical time.

  8. Development of a ciliary muscle-driven accommodating intraocular lens

    NARCIS (Netherlands)

    Hermans, Erik A.; Terwee, Thom T.; Koopmans, Steven A.; Dubbelman, Michiel; van der Heijde, Rob G. L.; Heethaar, Rob M.

    2008-01-01

    PURPOSE: To develop a ciliary muscle-driven accommodating intraocular lens (IOL) that has a large and predictable range of variable power as a step toward spectacle independence. SETTING: Department of Physics and Medical Technology, VU University Medical Center, Amsterdam, The Netherlands. METHODS:

  9. Combined aniridic intraocular lens implantation and vitreoretinal surgery

    Directory of Open Access Journals (Sweden)

    Mehta Hitendra

    2007-01-01

    Full Text Available A 45-year-old man presented with post-traumatic aniridia. We describe the combined surgery done to treat both aniridia and epiretinal membrane simultaneously. A combined aniridia intraocular lens and vitreoretinal surgery was done. The case report highlights the advantage of combined surgery in terms of cost factor and surgical time.

  10. Liquid-crystal intraocular adaptive lens with wireless control

    NARCIS (Netherlands)

    Simonov, A.N.; Vdovine, G.V.; Loktev, M.

    2007-01-01

    We present a prototype of an adaptive intraocular lens based on a modal liquid-crystal spatial phase modulator with wireless control. The modal corrector consists of a nematic liquid-crystal layer sandwiched between two glass substrates with transparent low- and high-ohmic electrodes, respectively.

  11. Clinical effects of phakic posterior chamber intraocular lens implantation for very high myopia%有晶状体眼后房型人工晶状体植入术治疗超高度近视的临床研究

    Institute of Scientific and Technical Information of China (English)

    产竹林; 邹召中; 崔俐; 余红莲

    2014-01-01

    观察分析有晶状体眼后房型人工晶状体植入术( ICL)治疗超高度近视的临床疗效。方法选择分析我院2011年6月至2013年6月行有晶状体眼后房型人工晶状体植入术治疗超高度近视患者14例(25只眼)。术前常规检查视力、最佳矫正视力,进行各项检查后,行单眼或者双眼有晶状体眼后房型人工晶状体植入术,术后观察视力、眼压及内皮细胞计数变化情况。结果术后视力0.3~1.0。术后2例(3只眼)出现早期眼压升高,经降眼压治疗,3~4 d后眼压正常。结论有晶状体眼后房型人工晶状体植入术治疗超高度近视及散光疗效确切,患者满意度好,预测性好,手术安全。%Objective To analyse the clinical efficacy of phakic posterior chamber intraocular lens implantation (ICL) for treatment of very high myopia .Methods Totally 14 patients ( 25 eyes) with phakic posterior chamber intraoc-ular lens implantation were analysed from June 2011 to June 2013.Routine visual acuity ,best-corrected visual acuity and various important examinations were performed preoperatively for phakic posterior chamber intraocular lens implantation . Results Postoperative visual acuity was 0.3 to 1.0.Complications were secondary glaucoma .3 eyes of 2 patients had in-creased intraocular pressure shortly after surgery .After treatment, the intraocular pressure became normal in 3 to 4 days. Conclusion The phakic posterior chamber IOL was efficacious , predictable and safe .

  12. Comparison of a new-generation sectorial addition multifocal intraocular lens and a diffractive apodized multifocal intraocular lens.

    NARCIS (Netherlands)

    Linden, J.W.M. van der; Velthoven, M. van; Meulen, I. van der; Nieuwendaal, C.; Mourits, M.; Lapid-Gortzak, R.

    2012-01-01

    PURPOSE: To compare visual, refractive, and satisfactory outcomes between a new-generation sectorial addition multifocal intraocular lens (IOL) (Lentis Mplus LS-312; study group) and a diffractive apodized multifocal IOL (Restor SN6AD1; control group). SETTING: Private practice, Driebergen, and Depa

  13. Retropupillary iris claw intraocular lens implantation in aphakia for dislocated intraocular lens

    Science.gov (United States)

    Faria, Mun Yueh; Ferreira, Nuno Pinto; Pinto, Joana Medeiros; Sousa, David Cordeiro; Leal, Ines; Neto, Eliana; Marques-Neves, Carlos

    2016-01-01

    Background Nowadays, dislocated intraocular lenses (IOLs) and inadequate capsular support are becoming a challenge for every ophthalmic surgeon. Explantation of dislocated IOL and iris claw IOL (ICIOL) are the techniques that have been used in our ophthalmic department. The aim of this study is to report our technique for retropupillar ICIOL. Methods This study is a retrospective case series. A total of 105 eyes with dislocated IOL from the patients at the Department of Ophthalmology in Santa Maria Hospital, a tertiary reference hospital in Lisbon, Portugal, from January 2012 until January 2016, had been analyzed. Of these 105 eyes, 66 eyes had dislocated one-piece IOL and 39 eyes had dislocated three-piece IOL. The latter underwent iris suture of the same IOL and were excluded from this study. The remaining 66 eyes with dislocated one-piece IOL underwent pars plana vitrectomy, that is, explantation of dislocated IOL through corneal incision and an implantation of retropupillary ICIOL. Operative data and postoperative outcomes included best corrected visual acuity, IOL position, intraocular pressure, pigment dispersion, clinical signs of endothelial cell loss, and anterior chamber depth. Results The mean follow-up was 23 months (range: 6–48 months). The mean preoperative best corrected visual acuity was 1.260±0.771 logMAR, and postoperative best corrected visual acuity was 0.352±0.400 logMAR units. Mean vision gain was 0.909 logMar units. The patients had the following complications: 1) retinal detachment was found in one patient, 2) corneal edema was found in three patients, 3) high intraocular pressure was observed in twelve patients, 4) subluxation of the IOL was observed in one patient, and 5) macular edema was found in three eyes. Conclusion The results demonstrate that retropupillary ICIOL is an easy and effective method for the correction of aphakia in patients not receiving capsule support. The safety of this procedure must be interpreted in the context

  14. Retropupillary iris claw intraocular lens implantation in aphakia for dislocated intraocular lens

    Directory of Open Access Journals (Sweden)

    Faria MY

    2016-08-01

    Full Text Available Mun Yueh Faria,1–3 Nuno Pinto Ferreira,1–3 Joana Medeiros Pinto,1–3 David Cordeiro Sousa,1–3 Ines Leal,1–3 Eliana Neto,1–3 Carlos Marques-Neves1–3 1Centro de Estudos da Visão, Universidade de Lisboa, 2Department of Ophthalmology, Hospital de Santa Maria, 3Faculty of Medicine, University of Lisbon, Lisbon, Portugal Background: Nowadays, dislocated intraocular lenses (IOLs and inadequate capsular support are becoming a challenge for every ophthalmic surgeon. Explantation of dislocated IOL and iris claw IOL (ICIOL are the techniques that have been used in our ophthalmic department. The aim of this study is to report our technique for retropupillar ICIOL.Methods: This study is a retrospective case series. A total of 105 eyes with dislocated IOL from the patients at the Department of Ophthalmology in Santa Maria Hospital, a tertiary reference hospital in Lisbon, Portugal, from January 2012 until January 2016, had been analyzed. Of these 105 eyes, 66 eyes had dislocated one-piece IOL and 39 eyes had dislocated three-piece IOL. The latter underwent iris suture of the same IOL and were excluded from this study. The remaining 66 eyes with dislocated one-piece IOL underwent pars plana vitrectomy, that is, explantation of dislocated IOL through corneal incision and an implantation of retropupillary ICIOL. Operative data and postoperative outcomes included best corrected visual acuity, IOL position, intraocular pressure, pigment dispersion, clinical signs of endothelial cell loss, and anterior chamber depth.Results: The mean follow-up was 23 months (range: 6–48 months. The mean preoperative best corrected visual acuity was 1.260±0.771 logMAR, and postoperative best corrected visual acuity was 0.352±0.400 logMAR units. Mean vision gain was 0.909 logMar units. The patients had the following complications: 1 retinal detachment was found in one patient, 2 corneal edema was found in three patients, 3 high intraocular pressure was observed in

  15. Controversies in intraocular lens implantation in pediatric uveitis.

    Science.gov (United States)

    Phatak, Sumita; Lowder, Careen; Pavesio, Carlos

    2016-12-01

    Cataract is one of the most common and visually debilitating complications of pediatric uveitis. It develops as a consequence of chronic inflammation and steroid use and is seen most often in juvenile idiopathic arthritis (JIA)-associated uveitis. Cataract extraction with intraocular lens (IOL) insertion has been carried out with a measure of success in non-uveitic pediatric eyes, but in cases of uveitis, multiple factors affect the final outcome. Chronic inflammation and its sequelae such as band keratopathy, posterior synechiae, and cyclitic membranes make surgical intervention more challenging and outcome less certain. Postoperative complications like increased inflammation, glaucoma, posterior capsular opacification, retrolental membranes, and hypotony may compromise the visual outcome. Early refractive correction is imperative in pediatric eyes to prevent amblyopia. The use of contact lenses and intraocular lenses in pediatric uveitic eyes were fraught with complications in the past. Surgical interventions such as vitreo-lensectomy followed by contact lens fitting and small incision cataract surgery followed by different types of intraocular lenses have been utilized, and many reports have been published, albeit in small patient groups. This review analyzes and discusses the existing literature on intraocular lens implantation in cases of pediatric uveitic cataract surgery. PMID:27009616

  16. Controversies in intraocular lens implantation in pediatric uveitis.

    Science.gov (United States)

    Phatak, Sumita; Lowder, Careen; Pavesio, Carlos

    2016-12-01

    Cataract is one of the most common and visually debilitating complications of pediatric uveitis. It develops as a consequence of chronic inflammation and steroid use and is seen most often in juvenile idiopathic arthritis (JIA)-associated uveitis. Cataract extraction with intraocular lens (IOL) insertion has been carried out with a measure of success in non-uveitic pediatric eyes, but in cases of uveitis, multiple factors affect the final outcome. Chronic inflammation and its sequelae such as band keratopathy, posterior synechiae, and cyclitic membranes make surgical intervention more challenging and outcome less certain. Postoperative complications like increased inflammation, glaucoma, posterior capsular opacification, retrolental membranes, and hypotony may compromise the visual outcome. Early refractive correction is imperative in pediatric eyes to prevent amblyopia. The use of contact lenses and intraocular lenses in pediatric uveitic eyes were fraught with complications in the past. Surgical interventions such as vitreo-lensectomy followed by contact lens fitting and small incision cataract surgery followed by different types of intraocular lenses have been utilized, and many reports have been published, albeit in small patient groups. This review analyzes and discusses the existing literature on intraocular lens implantation in cases of pediatric uveitic cataract surgery.

  17. Carbachol as miotic agent in intra-ocular lens implant surgery

    Directory of Open Access Journals (Sweden)

    Agarwal Jitendra

    1988-01-01

    Full Text Available The intra cameral use of 0.025% carbachol as a miotic agent in anterior chamber intraocular lens im-plant surgery us reported in 15 cases. Carbachol produced prompt and effective moisis and was found to be harmless and non-irritating to the anterior chamber structures. A rebound dialatation of the pipit was noticed in the post operative period in 3 of our first 5 cases where only carbachol was used. For prolonged miosis instillation of a more powerful miotic like pilocarpine is recommended at the completion of surgery:

  18. [Results of intraocular lens implantation in cataract complicated by medium and high myopia].

    Science.gov (United States)

    Plotnikova, Iu A; Chuprov, A D; Volkov, D V

    2001-01-01

    Results of surgical treatment of cataract complicated by medium and high myopia are analyzed. The main group consisted of 90 patients (96 eyes) subjected to extracapsular cataract extraction with implantation of posterior-chamber intraocular lenses and the reference group of 128 patients in whom cataract was extracted without implantation of artificial lens. The study included creation of a mathematical model of myopic eye with estimation of pressure fluctuations in various zones of the eye, developing during transposition of the vitreous during patient's movements (head movements, jumps, falling) and the damping effect of the lens in the ocular system. It was proven by mathematical calculations that transpositions of jelly fractions of the vitreous decreased by 70% in an eye with the lens in comparison with their transposition in aphakia. Clinical studies demonstrated the efficiency of intraocular correction of aphakia in high myopia: implantation of an intraocular lens decreases the risk of detachment of the retina during the postoperative period and helps attain the desired refraction. PMID:11765458

  19. Intraocular lens power estimation by accurate ray tracing for eyes underwent previous refractive surgeries

    Science.gov (United States)

    Yang, Que; Wang, Shanshan; Wang, Kai; Zhang, Chunyu; Zhang, Lu; Meng, Qingyu; Zhu, Qiudong

    2015-08-01

    For normal eyes without history of any ocular surgery, traditional equations for calculating intraocular lens (IOL) power, such as SRK-T, Holladay, Higis, SRK-II, et al., all were relativley accurate. However, for eyes underwent refractive surgeries, such as LASIK, or eyes diagnosed as keratoconus, these equations may cause significant postoperative refractive error, which may cause poor satisfaction after cataract surgery. Although some methods have been carried out to solve this problem, such as Hagis-L equation[1], or using preoperative data (data before LASIK) to estimate K value[2], no precise equations were available for these eyes. Here, we introduced a novel intraocular lens power estimation method by accurate ray tracing with optical design software ZEMAX. Instead of using traditional regression formula, we adopted the exact measured corneal elevation distribution, central corneal thickness, anterior chamber depth, axial length, and estimated effective lens plane as the input parameters. The calculation of intraocular lens power for a patient with keratoconus and another LASIK postoperative patient met very well with their visual capacity after cataract surgery.

  20. Microscopic and spectroscopic investigation of an explanted opacified intraocular lens

    Science.gov (United States)

    Simon, V.; Radu, T.; Vulpoi, A.; Rosca, C.; Eniu, D.

    2015-01-01

    The investigated polymethylmethacrylate intraocular lens explanted an year after implantation presented a fine granularity consisting of ring-like grains of about 15 μm in diameter. In order to evidence the changes occurred on intraocular lens relative to morphology, elemental composition and atomic environments, microscopic and spectroscopic analyses were carried out using scanning electron microscopy (SEM), Fourier transform infrared (FTIR), energy-dispersive X-ray (EDS), and X-ray photoelectron (XPS) spectroscopies. The results revealed that the grains contain hydroxyapatite mineral phase. A protein layer covers the lens both in opacified and transparent zones. The amide II band is like in basal epithelial cells. The shape and size of the grains, and the XPS depth profiling results indicate the possibility of a cell-mediated process involving lens epithelial cells which fagocitated apoptotic epithelial cells, and in which the debris derived from cell necrosis were calcified. To the best of our knowledge, this is the first investigation on explanted intraocular lenses using XPS depth profiling in order to examine the inside of the opacifying deposits.

  1. Complications and treatment in early time of posterior chamber phakic intraocular contact lens implantation%有晶体眼后房型人工晶体植入术早期并发症观察及其处理

    Institute of Scientific and Technical Information of China (English)

    吴燕; 罗涛; 蒋炜; 邱敏

    2014-01-01

    目的:观察有晶体眼后房型人工晶体( ICL)植入治疗高度近视早期的并发症及处理情况,并探讨其原因。方法观察在我院行ICL/TICL植入术的患者46例(92眼),在虹膜周切手术和ICL植入手术中及术后半年出现的并发症,记录并发症处理方法以及处理后的情况。结果无1例瞳孔阻滞性青光眼发生,术前虹膜周切后有8眼眼压升高,ICL植入术后有7眼眼压升高,均未超过28 mmHg,未做特殊处理;术前 YAG 激光虹膜周切组虹膜出血及色素播散的发生率明显高于手术虹膜周切组(P<0.05),术中晶体损伤2眼,1眼行透明晶体摘除及人工晶体植入;术后TICL旋转2眼,术后视觉干扰主要表现阴影及眩光各1例,术后视觉心理改变1例。结论 ICL植入治疗高度近视早期并发症少,基本可预防和控制,术后患者满意度极高,该手术方式值得大力推广。%Objective To investigate the complications and outcomes of the treatments in the early time of posterior chamber phakic in-traocular contact lens ( ICL) implantation for the treatment of high myopia, and to analyze the causes. Methods Forty-six patients ( 92 eyes) who underwent ICL/TICL implantations were enrolled in this study. The intraoperative and the postoperative complications in 6 months were observed,at the same time also the treatments and the outcomes were observed. Results None of the patients had a pupillary block. Only 8 eyes in all the patients had an elevated IOP after peripheral iridectomy ( PI) ,and 7 eyes after the ICL implantation,the highest IOP in which was 28 mmHg. No medication was given for treatment. In the YAG PI group,the incidence rate of iris bleeding and pigment dispersion were all higher than that in the YAG PI group (P<0. 05);2 crystalline lens of different patient were damaged intraoperation. Rotation of TICL was observed in 2 eyes. Only 2 individuals of all the patients in this study had complained visual disturbances,which was

  2. 有晶状体眼后房型人工晶状体总长度选择的回顾性分析%Selection of the posterior chamber phakic intraocular lens length

    Institute of Scientific and Technical Information of China (English)

    曹信芳; 汪阳; 沈晔; 童剑萍; 夏建华; 周天安; 叶蓓

    2013-01-01

    .虹膜-ICL接触距离为(0.85 ±0.46) mm.ICL中央拱高(ICL中央部与自身晶状体之间的距离)平均为(0.47±0.25)mm,与角膜水平直径的相关系数r=0.11,与睫状沟间距的相关系数r=0.16,与前房深度的相关系数r=0.04,与ICL长度的相关系数r=0.19,均无统计学意义(P>0.05).ICL周边拱高(ICL周边部与自身晶状体之间的距离)为0~1.23 mm,平均为(0.25±0.20) mm.结论 根据角膜水平直径选择的ICL,其长度适宜,术后并发症少,ICL拱高理想,为ICL植入术良好的安全性、有效性和可预测性提供了有力保障.%Objective To evaluate the efficacy,safety and clinical value of calculating the posterior chamber phakic intraocular lens (ICL) length according to the corneal horizontal diameter.Methods This was a retrospective study.A Staar Visian implantable contact lens (ICL) was implanted in 32 patients (64 eyes) with high myopia in the Department of Ophthalmology,the First Affiliated Hospital,College of Medicine,Zhejiang University between November 15,2005 and January 15,2011.The lens length was calculated according to the corneal horizontal diameter measured by Orbscan Ⅱ.Patients were followed up postoperatively at 1 day,1 week,1,3,6 and 12 months and every 6 months thereafter.The evaluations included visual acuity,manifest refraction,applanation tonometry,endothelial cell count,slit-lamp microscopy to detect cataract,and UBM to assess the degree of ICL tilt and distances between the corneal endothelium,the ICL,and the crystalline lens.All of the preoperative and 12-month follow-up observations were analyzed using SPSS 16.0 software.Results No anterior subcapsular cataracts were found in any of the eyes after surgery.Pigmentary dispersion was observed on the anterior and posterior surface of the ICL,but the difference was not statistically significant (x2 =2.24,P =0.13).The intraocular pressure changed from (15.67 ± 3.23) mm Hg(1 mm Hg =0.133 kPa) to (15.78 ± 3.23)mm Hg,but the difference was not significant (t =0

  3. Intraocular electro-optic lens with ciliary muscle controlled accommodation.

    Science.gov (United States)

    Doornaert, Dries; Glorieux, Christ; De Gersem, Herbert; Puers, Robert; Spileers, Werner; Blanckaert, Johan

    2013-01-01

    In this paper a concept is proposed of an intraocular lens implant with electro-optic accommodation of a variable-focus hybrid liquid-crystal-based lens. The dioptric strength of the lens is electronically controlled by a signal that is derived from the change of inductance of a sensing coil due to a marker implanted in the nearby contracting or decontracting ciliary muscle. Analytical, numerical and experimental results are reported on the dependency of the frequency of a Colpitts oscillator circuit on the location of a nearby conductive marker. A concept is also reported on the use as an electro-optic lens of a device based on a liquid crystal in planar alignment, which is held between a flat and a curved window coated with optically transparent and electrically conductive layers. PMID:24110406

  4. Black intraocular lens: another cosmetic approach to leukocoria

    OpenAIRE

    Pedrosa, C; Pina, S.; Azevedo, A.; Pêgo, P; Feijóo, B; Prieto, I

    2012-01-01

    Purpose – To present a case report of a black intraocular lens implantation for cosmetic improvement of a blind eye with leukocoria. Setting – Ophthalmology Department - Professor Dr. Fernando Fonseca Hospital, EPE - Amadora, Lisboa, Portugal Methods – We report a 32-year-old woman who was evaluated because of the undesired cosmetic appearance of her amblyopic left eye with exotropia and leukocoria due to traumatic cataract and total retinal detachment during childhood. The Examination ...

  5. Technology needs for the development of the accommodative intraocular lens

    Science.gov (United States)

    Nishi, Okihiro

    2010-02-01

    Refilling the lens capsule while preserving capsular integrity offers the potential to restore ocular accommodation. There are two persisting problems in capsular bag refilling for possible clinical application: Leakage of the injectable material through the capsular opening and capsular opacification. Numerous attempts for solving these cardinal problems have not been proven to be clinically applicable. Recently, we developed a novel capsular bag refilling procedure using a novel accommodative intraocular lens that serves as an optic as well as a plug for sealing the capsular opening. The procedure and the results of monkey experiments will be presented.

  6. Comparação entre os resultados pós-operatórios de pacientes submetidos ao procedimento tríplice e transplante de córnea combinado a fixação secundária de lente intra-ocular Comparison between the postoperative results of triple procedure and combined penetrating keratoplasty/ transsclerally sutured posterior chamber lens implantation

    Directory of Open Access Journals (Sweden)

    Daniela Maggioni Pereira Leão

    2006-08-01

    Full Text Available OBJETIVO: Comparar os resultados pós-operatórios de 2 grupos de pacientes submetidos a transplante de córnea com técnicas e tempo cirúrgico diferentes, em relação à abordagem do cristalino e/ou lente intra-ocular. MÉTODOS: Neste estudo retrospectivo foram analisados 37 olhos de pacientes divididos em 2 grupos: extração de catarata, implante de lentes intra-oculares (LIO e transplante de córnea no mesmo tempo cirúrgico - grupo 1 (G1 e extração de catarata sem implante de lentes intra-oculares no primeiro tempo cirúrgico e fixação secundária de lentes intra-oculares associada a transplante de córnea no segundo tempo cirúrgico - grupo 2 (G2. As variáveis estudadas foram: acuidade visual, pressão intra-ocular (PIO, astigmatismo refracional, astigmatismo ceratométrico e complicações pós-operatórias. RESULTADOS: Foi observado melhora da acuidade visual nos 2 grupos (G1 pPURPOSE: To compare the outcomes of two surgical techniques of penetrating keratoplasty with different surgical time, regarding the crystalline and the intraocular lens. METHODS: This retrospective study included 37 patients' eyes divided into 2 groups: extracapsular cataract extraction, posterior chamber intraocular lens implantation and penetrating keratoplasty (Group 1, G1 and transscleral fixation of posterior chamber lens and penetrating keratoplasty (Group 2, G2. The following parameters were recorded: visual acuity, intraocular pressure, refractive astigmatism, complication and keratometric astigmatism. RESULTS: Visual acuity improved in the two groups (G1 p<0.001 and G2 p=0.008. In G2 a significant change for the worse of intraocular pressure outcome was observed when compared with the other group (p=0.014. Regarding refractive and keratometric astigmatism no significant differences between the groups were found. The follow-up was 11 months. CONCLUSION: The most important negative prognostic factor affecting visual acuity was the postkeratoplasty

  7. Surgical management of intraocular lens dislocations

    Directory of Open Access Journals (Sweden)

    Adem Gul

    2015-10-01

    Full Text Available ABSTRACTPurpose:To report and compare the surgical, visual, and anatomical outcomes following treatment of dislocated intraocular lenses (IOLs.Methods:The medical records of 28 eyes of 28 patients were evaluated. Age, gender, pre-and postoperative best-corrected visual acuity (BCVA, surgical methods, and complications were recorded.Results:Pre-and postoperative BCVA ranged from counting fingers to 20/32 and from counting fingers to 20/25, respectively. Late-onset dislocations were the most frequently observed complication. The most frequent surgical method was IOL repositioning in 15 of 28 patients, followed by IOL exchange in 11 patients, and IOL removal in 2 patients. Only 1 patient required surgical re-intervention with IOL capture.Conclusions:Visual acuity improved following the use of either IOL repositioning or IOL exchange. No superiority of one method over the other was observed. In the present retrospective case series, management of dislocated IOLs with repositioning or exchange of the primary implant conferred comparable surgical and visual outcomes.

  8. Posterior Iris Fixated Intraocular Lens for Pediatric Traumatic Cataract

    Science.gov (United States)

    Kavitha, V.; Balasubramanian, Preethi; Heralgi, Mallikarjun M.

    2016-01-01

    Purpose: To evaluate the postoperative visual outcomes and complications of posterior iris fixated intraocular lens (IFIOL) implantation for pediatric traumatic cataract. Methods: A retrospective clinical audit was performed of all the pediatric traumatic cataract patients who underwent lens removal and iris fixated lens implantation due to inadequate capsular support with or without corneal tear repair between January 2009 and December 2013. Data were collected and analyzed on the preoperative and postoperative visual outcomes and complications. Results: Twenty-five children (25 eyes; 21 males and 4 females) were enrolled with the mean age of 11 ± 4.0 years. There were 72% of eyes that underwent primary cataract removal with IFIOL implantation. Twenty-eight percent of eyes underwent corneal tear repair prior to intraocular lens (IOL) implantation. Preoperative best corrected visual acuity (BCVA) was hand motion in 32% eyes, counting fingers in 24%, and perception of light in 44%. Postoperative BCVA of 0-0.2 logarithm of minimum angle of resolution was reported in the 64% of eyes. One eye developed secondary glaucoma, one eye underwent re-enclavation, and none developed retinal complications. Conclusion: Posterior IFIOL implantation resulted in an improved visual outcome, low incidence of postoperative complications, and is a good alternative to other IOL, in the cases of pediatric traumatic cataract without adequate capsular support. PMID:27162456

  9. Iris Claw versus Scleral Fixation Intraocular Lens Implantation during Pars Plana Vitrectomy

    Directory of Open Access Journals (Sweden)

    Fereydoun Farrahi

    2012-01-01

    Full Text Available Purpose: To compare the outcomes of iris claw anterior chamber intraocular lens (ICACIOL with that of scleral fixation posterior chamber intraocular lens (SF-PCIOL implantation during pars plana vitrectomy (PPV as initial surgery to correct aphakia. Methods: Twelve patients with complicated cataract surgery or trauma who had suffered nucleus, whole crystalline lens or intraocular lens (IOL drop into the vitreous cavity, and undergone PPV with IC-ACIOL implantation over a period of one year were evaluated for the purpose of this study. Uncorrected visual acuity (UCVA, best corrected visual acuity (BCVA, central corneal thickness (CCT, spherical equivalent (SE refractive error, astigmatism and complications were recorded. The results were compared to outcomes of another group of 13 patients who had previously undergone PPV with SF-PCIOL implantation. Results: Mean improvement of UCVA was greater in IC-ACIOL eyes as compared to the SF-PCIOL group (-1.17±0.28 versus -0.89±0.21 logMAR, P=0.01, corresponding values for postoperative BCVA were 0.24±0.17 and 0.44±0.22 logMAR (P=0.041, respectively. Average postoperative SE was comparable in the IC-ACIOL and SFPCIOL groups at 0.6±1.03 and 0.56±1.23 diopters, respectively (P=0.290. However, 10 (83.3% IC-ACIOL eyes versus 6 (46.1% SF-PCIOL eyes had SE within 1 diopter of emmetropia (P=0.048. Mean postoperative increase in CCT was comaparble between the study groups (P=0.126. Conclusion: In the absence of sufficient capsular support, the use of an IC-ACIOL for correction of aphakia during PPV can be a good alternative and seems to entail better visual outcomes as compared to SF-PCIOL.

  10. Optical bench performance of a novel trifocal intraocular lens compared with a multifocal intraocular lens

    Science.gov (United States)

    Lee, Shinwook; Choi, Myoung; Xu, Zaiwei; Zhao, Zeyu; Alexander, Elsinore; Liu, Yueai

    2016-01-01

    Purpose The purpose of this study is to compare the optical characteristics of the novel PanOptix presbyopia-correcting trifocal intraocular lens (IOL) and the multifocal ReSTOR +3.0 D IOL, through in vitro bench investigations. Methods The optical characteristics of AcrySof® IQ PanOptix™ (PanOptix) and AcrySof® IQ ReSTOR +3.0 D (ReSTOR +3.0 D) IOLs were evaluated by through-focus Badal images, simulated headlight images, and modulation transfer function (MTF) measurements which determine resolution, photic phenomena, and image quality. Through-focus Badal images of an Early Treatment of Diabetic Retinopathy Study chart were recorded at both photopic and mesopic pupil sizes. Simulated headlight images were taken on an MTF bench with a 50-μm pinhole target and a 5.0 mm pupil at the distance focus of the IOL. MTF curves were measured with a 3.0 mm pupil, and spatial frequencies equivalent to 20/40 and 20/20 visual acuities were recorded to illustrate the through-focus MTF curves. Far-, intermediate-, and near-focus MTF values were obtained. Results Bench Badal image testing and MTF measurements showed that PanOptix has a near focus at a distance of 42 cm and an additional intermediate focus at a distance of about 60 cm. The near focus for ReSTOR +3.0 D is at 45 cm. PanOptix and ReSTOR +3.0 D have comparable photopic distances and near MTF values. Additionally, PanOptix provided a substantial continuous range of vision from distance to intermediate and to near compared with ReSTOR +3.0 D. The halo propensity for PanOptix was slightly higher than that for ReSTOR +3.0 D. Conclusion Laboratory-based in vitro simulations showed that PanOptix trifocal IOL has comparable resolution and image quality performance in distance and near foci compared with ReSTOR +3.0 D IOL. PanOptix showed better resolution and image quality performance at the intermediate focus than ReSTOR +3.0 D IOL. PMID:27330273

  11. 有晶状体眼虹膜夹型和后房型人工晶状体植入矫正高度近视术后的视觉质量对比%Evaluation of visual quality after phakic posterior chamber intraocular lens and iris-claw phakic intraocular lens Implantation for high myopia

    Institute of Scientific and Technical Information of China (English)

    郭红亮; 郑广瑛; 王松田; 王洁; 王瑞娜; 赵建国; 赵丽君

    2011-01-01

    背景 矫正近视的手术可分为激光矫治术和人工晶状体(IOL)植入术.高度近视患者角膜比正常人薄,不适合激光矫治手术,宜考虑IOL植入术.目的 对比观察两种有晶状体眼IOL植入术治疗高度近视的视觉质量.方法选取在郑州大学第一附属医院和解放军第91中心医院行前房虹膜夹型人工晶状体(Verisyse PIOL)植入术的高度近视患者19例34眼随机分为两种手术组,其中10例17眼为PIOL组,行后房型人工晶状体(ICL)植入术者9例17眼为ICL组.两种手术均由同一高年资医师完成.随访期为6个月,观察患者术后的裸眼视力、最佳矫正视力、对比敏感度(CS)和波前像差,对2组的检测指标进行比较.结果术后6个月2组间患者裸眼视力和最佳矫正视力的差异均无统计学意义(t=0.489,P>0.05;t=0.853,P>0.05);2组患者间无眩光时在3、6、12、18 c/d空间频率下CS的差异均无统计学意义(t=0.906,P>0.05;t=0.103,P>0.05;t=0.694,P>0.05;t=1.583,P>0.05);3、6、12、18 c/d空间频率下2组间患者的眩光敏感度比较差异均无统计学意义(t=0.323,P>0.05;t=0.041,P>0.05;t=0.024,P>0.05;t=0.363,P>0.05).PIOL组三阶彗差(RMS3)、四阶球差(RMS4)、总高阶像差(RMSh)均高于ICL组.其中RMS3、RMSh明显高于ICL组,差异均有统计学意义(t=11.400,P0.05).结论虹膜夹型IOL与ICL植入矫正高度近视均能达到预期的效果,术后视力相当,但虹膜夹型IOL的视觉质量稍逊于ICL,远期效果还需进一步随访观察.%Background High myopia can be corrected using laser therapy and intraocular lens(IOL)implantation.IOL implantation is more suitable than laser therapy for high myopia if the patients suffer from thinner cornea.Objective This clinical trail was to assess and compare the visual quality following phakic iris-claw intraocular lens (IOL) and implantable contact lens(ICL) implantation for high myopia.MethodsIris-claw phakic intraocular lens was implanted in 17 eyes of

  12. 后房型有晶状体眼人工晶状体植入对眼轴测量的影响%Effects of posterior chamber phakic intraocular lens on axial length measurements

    Institute of Scientific and Technical Information of China (English)

    俞阿勇; 郑林燕; 王勤美; 朱双倩; 薛安全; 苏炎峰; 潘蕊

    2015-01-01

    目的 探讨后房型有晶状体眼人工晶状体(PIOL)植入对眼轴测量的影响,以及日后若行白内障摘除及人工晶状体植入术时计算人工晶状体度数采用校正系数的必要性.方法 收录行PIOL植入术的高度近视眼患者,其中有晶状体眼屈光镜(PRL)组22例(39只眼),等效球镜度数(-19.00±4.03)D,植入后房悬浮型PIOL;可植入式接触镜(ICL)组24例(40只眼),等效球镜度数(-13.10±2.53)D,植入睫状沟支撑型PIOL.采用相干光生物测量仪(IOLMaster)测量手术前后的眼轴长度并进行比较.PIOL植入术前后的参数,如等效球镜、最佳矫正视力、眼轴等的比较采用配对t检验.手术前后眼轴测量值之间的数量关系分析采用直线回归方法.结果 手术前后眼轴PRL组分别为(30.87±2.18)、(30.94±2.16) mm(t=-2.64,P=0.012),ICL组分别为(28.35±1.20)、(28.45±1.22) mm(t=-3.97,P<0.001).直线回归分析示PRL组:术前眼轴=1.01×术后眼轴-0.24(R2 =0.99,P<0.001),术后眼轴-术前眼轴=0.24-0.005 5×术后眼轴,手术前后眼轴差异平均为0.075 mm;ICL组:术前眼轴=0.96×术后眼轴+1.17(R2 =0.99,P<0.001),术后眼轴-术前眼轴=0.015 4 ×术后眼轴-0.376 3,手术前后眼轴差异平均为0.054 mm.结论 根据SRK公式,小于0.1 mm的眼轴误差导致的人工晶状体度数误差不超过0.25 D,相当于在框架眼镜平面不超过0.20 D.因此后房型PIOL矫治高度近视术后,若日后行白内障摘除及人工晶状体植入术时,眼内的PIOL对眼轴测量影响不大,且PRL误差随着眼轴的延长而缩小,计算人工晶状体度数采用校正系数的必要性不大.%Objective To study the effects of posterior chamber phakic intraocular lens (IOL) on axial length (AL) measurements and whether a correction factor for later IOL power calculation before cataract surgery is necessary.Methods Twenty-two high myopic patients (39 eyes) with mean spherical equivalent-19.00 ± 4.03 D received phakic

  13. Closure of a persistent cyclodialysis cleft using the haptics of a normal-sized intraocular lens.

    Science.gov (United States)

    Shentu, Xingchao; Zhu, Yanan; Tang, Yelei

    2011-11-01

    A 50-year-old man suffering from hypotony in the right eye caused by a traumatic cyclodialysis and complicated by a choroidal detachment and cataract was treated in our clinic. After an unsuccessful direct cyclopexy, phacoemulsification was performed and a normal-sized single-piece polymethyl methacrylate posterior chamber intraocular lens (PMMA PCIOL) was inserted into the ciliary sulcus, with the haptic rotated toward the cyclodialysis cleft. Postoperatively, the corrected visual acuity improved to 20/20, and the intraocular pressure returned to normal. Ultrasound biomicroscopy showed the closure of the cleft. Phacoemulsification with a normal-sized PMMA PCIOL inserted into the ciliary sulcus is a safe, effective and technically simple surgical treatment for small cyclodialysis induced hypotony complicated by cataract. Internal compression of the cleft by the haptic of a normal sized IOL along with postoperative inflammation led to scarring and closure of the cleft.

  14. Implantation of iris-claw Artisan intraocular lens for aphakia in Fuchs′ heterochromic iridocyclitis

    Directory of Open Access Journals (Sweden)

    Ahmad Kheirkhah

    2014-01-01

    Full Text Available Implantation of iris-claw Artisan intraocular lens (IOL is a surgical option for correction of aphakia; however, these IOLs have not been used in eyes with uveitis including Fuchs′ heterochromic iridocyclitis (FHI due to possible risk of severe postoperative intraocular inflammation. In the case reported here, we secondarily implanted an Artisan IOL in a 28-year-old man with FHI who had aphakia with no capsular support due to a previous complicated cataract surgery. Enclavation was easily performed and no intraoperative complication was noted. Postoperative course was uneventful with no significant anterior chamber inflammation during 12 months of follow-up. Although there were few deposits on the IOL surface, the patient achieved a best-corrected visual acuity of 20/20 without developing glaucoma or other complications. Therefore, Artisan IOL may be considered for correction of aphakia in patients with FHI. However, studies on large number of patients are required to evaluate safety of the procedure.

  15. Enhanced near stereopsis after phacoemulsification and implantation of posterior chamber intraocular lens by prescribing addition properly%人工晶状体眼近视力矫正对近立体视的影响

    Institute of Scientific and Technical Information of China (English)

    俞阿勇; 王勤美; 诸葛晶; 金婉卿; 姜珺; 赵云娥

    2008-01-01

    目的 探讨超声乳化白内障吸除及人工晶状体植入术后近立体视改善的方法和手段,为临床改善人工晶状体眼者生活质量提供依据.方法 前瞻性系列病例研究.随机收录年龄相关性白内障患者46例(92只眼),平均年龄(61.3±5.5)岁.其中单眼人工晶状体眼24例(A组),双眼人工晶状体眼22例(B组).测量调节幅度、相对调节、近附加、近立体视.对被收录者人工晶状体眼的一般资料及近附加等计量资料进行t检验,对受检者近立体视分布数据采用X2检验,以P<0.05有统计学意义.结果 A、B组人工晶状体眼移近法单眼调节幅度分别为(2.05±1.12)和(2.35±1.30)D;双眼近附加分别为(2.08±0.37)和(2.13±0.46)D,单眼近附加分别为(2.20±0.42)和(2.01±0.39)D,各组内双眼近附加与单眼近附加差异均有统计学意义(t=2.33,2.20;P<0.05),左右眼单眼近附加差异均有统计学意义(t=3.70,5.02;P<0.01).A、B组配戴单眼近附加时的近立体视优于双眼近附加,差异均有统计学意义(X2=6.46,7.02;P<0.05).结论 单眼近附加作为人工晶状体眼的近附加可以有效改善近屯体视.(中华眼科杂志,2008,44:711-714)%Objective To improve near stereopsis in pseudophakic eyes after phacocmulsification and implantation of posterior chamber intraocular lens (IOL). Methods This prospective case-series study comprised 92 eyes of 46 patients aged 50 to 70 years [mean age (61.33±5.54 ) years ] who hod phacocmulsification and implantation of posterior chamber IOL, including 24 unilateral pseudophakias (Group A ) and 22 bilateral pseudophakias (Group B ). The accommodative amplitude, relative accommodation, reading addition, near stereoacuity, etc. Were measured. All data were analyzed with the SPSS11.0 for Windows. Results (1) The mean value of monocular accommodative amplitude in the group A and group B was (2.05±1.12) and (2.35±1.30) D, respectively. (2) In the group A and group B,the binocular odd

  16. Clinical research on the implantation of posterior chamber phakic intraocular lens for correction of high myopia%有晶状体眼后房型人工晶状体植入术矫正高度近视

    Institute of Scientific and Technical Information of China (English)

    贾丽; 张超; 唐红; 张愉; 王婧; 秦萍

    2012-01-01

    目的:探讨有晶状体眼后房型人工晶状体(phakic intraocular lens,PIOL)植入术矫正高度近视的有效性和安全性.方法:本研究中高度近视患者17例33眼,术前屈光度-8.00~-24.00 (平均-15.46±6.26)D,眼轴长度25.33~33.77(平均30.22±2.55)mm.33眼植入后房型人工晶状体也称植入性接触镜(implantable contact lens,ICL& toric implantable collamer lens,TICL).其中,22眼植入ICL,11眼植入TICL.术后观察视力、屈光度、眼压、人工晶状体位置等.结果:所有病例均成功植入后房型人工晶状体.术后1wk,所有手术眼达到或超过术前最佳矫正视力,屈光度和眼压稳定.结论:有晶状体眼后房型人工晶状体植入术治疗高度近视安全有效,适用屈光度范围广,术后屈光度稳定,视觉质量提高.

  17. The relationship between cytokine level and nitric oxide content in aqueous humor after intraocular lens implantation

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    AIM: To investigate the relationship between cytokine level and nitric oxide (NO) content in aqueous humor after intraocular lens implantation. METHODS: All New Zealand rabbits were divided randomly into three groups: (1) control group, (2) extracapsular cataract extraction group (ECCE), (3) extracapsular cataract extraction and posterior chamber intraocular lens implantation group (ECCE+IOL). The inflammation of all experimental rabbit eyes, including cornea edema and anterior chamber exudation were observed via zoom-photo slitlamp microscope 1,3,7,14,30 d postoperation. Meanwhile, aqueous humor was drawn for white blood cell (WBC) counting and classifying, and for NO-2/NO-3 and cytokine assay, including interleukin-2(IL-2), tumour necrosis factor-α(TNF-α). Statistics were taken by SPSS softwear. RESULTS: (1) Total WBC in aqueous humor were higher and anterior chamber exudation were more severe in ECCE+IOL group than that in ECCE group and control group. (2) The level of IL-2 and TNF-α and the content of NO-2/NO-3 in aqueous humor of ECCE+IOL group were higher than that in ECCE group and control group 1-14 d postoperation respectively, and it increased to peak value at 3-7 d postoperation and decreased gradually after two weeks postoperation. (3) The change regularity of IL-2, TNF-α and NO-2/NO-3 in each group were basically similar, i.e. when the level of cytokine (IL-2 and TNF-α) was normal, the content of NO-2/NO-3 was normal too, when the level of cytokine (IL-2 and TNF-α) increased, the content of NO-2/NO-3 increased too. CONCLUSION: The intraocular inflammation after ECCE+IOL was more severe than that after simple ECCE. NO, IL-2 and TNF-α play an important role in intraocular inflammation after intraocular lens implantation. The changes of IL-2 and TNF-α level was closely related with NO content in aqueous humor.

  18. 晶状体眼后房型人工晶状体/散光性后房型人工晶状体术矫正高度近视的临床观察%Clinical observation of implantation of posterior chamber intraocular lens/astigmatism posterior chamber intraocular lens for patients with high myopia

    Institute of Scientific and Technical Information of China (English)

    杨吟; 刘治容; 陈斌; 陈波; 杨萍; 吴峥峥

    2014-01-01

    目的 研究晶状体眼后房型人工晶状体(implantable contact lens,ICL)/散光性后房型人工晶状体(TICL)植入术矫正高度近视的有效性及安全性.方法 收集在我院行IC[/TICL植入术的患者77例(153只眼),在术后第1天、1周、1月、3月和6月时行视力、裂隙灯显微镜、眼底镜和眼压检查,术后1个月加做客观检影验光.对比术前最佳矫正视力及术后裸眼视力的差异.结果 153只眼均成功植入了ICL/TICL,术后144只眼(94.12%)未发现明显的并发症.术后1周时,153眼的裸眼视力为0.83±0.15,术前矫正视力与术后裸眼视力比较差异无统计学意义(P>0.05).结论 ICL/TICL植入手术治疗高度/超高度近视,是目前对于该类患者有效且安全的治疗方案.

  19. Repositioning a decentered intraocular lens with 4 haptics.

    Science.gov (United States)

    Liu, Jiewei; Liu, Wenjie; Jia, Yading; Al-Mohtaseb, Zaina N; Wang, Li

    2016-03-01

    We describe a technique to reposition a decentered 4-haptic intraocular lens (IOL). Using an ophthalmic viscosurgical device, the haptic with the worst distortion is dissected from the capsular bag and pulled outside the bag. The opposite haptic (180 degrees away) is also dissected and placed in front of the anterior capsule. The remaining 2 haptics are left in the capsular bag. With this repositioning, the 2 haptics in the bag limit the IOL movement, the 2 haptics outside the bag are no longer distorted, and the IOL is centered. We present 2 cases in which this technique was used to reposition decentered 4-haptic IOLs.

  20. Akreos Adapt AO Intraocular Lens Opacification: A Case Report

    Directory of Open Access Journals (Sweden)

    Matteo Forlini

    2013-09-01

    Full Text Available A 79-year-old hyperglycemic patient was referred to the ‘Santa Maria delle Croci' Hospital, Ravenna, Italy. He presented with visual impairment in the right eye. Four years ago, he had had an uneventful cataract surgery in the right eye. We observed an opacification of the intraocular lens (IOL causing significant visual disturbance. The IOL was exchanged. Unfortunately, pathologic analysis was not performed. Patient-related factors such as hyperglycemia and hypertension might have been responsible for the opacification. To our knowledge, there is only one previous report of opacification of the Akreos Adapt AO IOL.

  1. Sutureless, Glueless, Scleral Fixation of Single-Piece and Toric Intraocular Lens: A Novel Technique.

    Science.gov (United States)

    Kelkar, Aditya; Shah, Rachana; Kelkar, Jai; Kelkar, Shreekant; Arora, Ekta

    2015-01-01

    Sutureless, glueless, scleral fixation of an intraocular lens is a known technique of fixing a lens in the scleral pockets. However, this technique is applied to single-piece and toric lenses instead of 3-piece lenses, allowing the advantage of the use of premium lenses in patients with poor capsular support. Favourable results without complications of pigment dispersion, iris transillumination defects, dysphotopsia, elevated intraocular pressure, intraocular hemorrhage and cystoid macular edema with a well-centered, stable intraocular lens have been observed in the 3-month postoperative period in both cases.

  2. Lente intra-ocular multifocal difrativa apodizada: resultados Diffractive apodized multifocal intraocular lens: results

    Directory of Open Access Journals (Sweden)

    Virgilio Centurion

    2007-12-01

    Full Text Available OBJETIVO: Mostrar os resultados visuais e refracionais com lente intra-ocular multifocal difrativa apodizada. MÉTODOS: Estudo de 100 olhos de 50 pacientes com catarata, submetidos à facoemulsificação com implante bilateral de lente intra-ocular (LIO multifocal difrativa apodizada. Foi avaliada a acuidade visual binocular sem e com correção para longe e perto, a previsibilidade refracional e a freqüência de uso de óculos. RESULTADOS: A acuidade visual sem correção para longe foi de e " 20/30 em 97,56% dos olhos operados e e" J2 em 100%, sendo que 82% dos pacientes nunca usam óculos e 16% usam de forma esporádica. CONCLUSÃO: A LIO multifocal difrativa apodizada mostrou ser uma opção previsível, reproduzível e segura na correção dos vícios de refração para longe e perto durante a cirurgia da catarata, permitindo elevado índice de independência ao uso de óculos.OBJECTIVE: To show visual and refraction results using multifocal diffractive apodized intraocular lens. METHODS: The study of 100 eyes of 50 patients with cataract, submitted to phacoemulsification with bilateral implant of multifocal diffractive apodized intraocular lens (IOL. Binocular visual acuity was evaluated with and without correction for near and distance, and refraction previsibility and frequency of wearing glasses. RESULTS: Visual acuity without correction for distance was e" 20/30 in 97.56% of eyes operated on and e" J2 in 100%, of these 82% of patients never wear glasses and 16% wear glasses sporadically. CONCLUSION: Multifocal diffractive apodized IOL proved to be a foreseeable option, reproducible and safe in the correction of refraction errors for distance and near during cataract surgery, enabling a high rate of independence from the use of glasses.

  3. Extracapsular cataract extraction : the fate of retained lens material and intraocular lenses

    NARCIS (Netherlands)

    J.P. Kappelhof (Johan)

    1987-01-01

    textabstractThe aim of this study was to examine the fate of the lens material that remains in the eye after an extracapsular cataract extraction both with and without insertion of an intraocular lens. Apart from this, the development of precipitates on the intraocular lenses was morphologically inv

  4. Comparison of two optical biometers in intraocular lens power calculation

    Directory of Open Access Journals (Sweden)

    Sheng Hui

    2014-01-01

    Full Text Available Aims: To compare the consistency and accuracy in ocular biometric measurements and intraocular lens (IOL power calculations using the new optical low-coherence reflectometry and partial coherence interferometry. Subjects and Methods: The clinical data of 122 eyes of 72 cataract patients were analyzed retrospectively. All patients were measured with a new optical low-coherence reflectometry system, using the LENSTAR LS 900 (Haag Streit AG/ALLEGRO BioGraph biometer (Wavelight., AG, and partial coherence interferometry (IOLMaster V.5.4 [Carl Zeiss., Meditec, AG] before phacoemulsification and IOL implantation. Repeated measurements, as recommended by the manufacturers, were performed by the same examiner with both devices. Using the parameters of axial length (AL, corneal refractive power (K1 and K2, and anterior chamber depth (ACD, power calculations for AcrySof SA60AT IOL were compared between the two devices using five formulas. The target was emmetropia. Statistical analysis was performed using Statistical Package for the Social Sciences software (SPSS 13.0 with t-test as well as linear regression. A P value < 0.05 was considered to be statistically significant. Results: The mean age of 72 cataract patients was 64.6 years ± 13.4 [standard deviation]. Of the biometry parameters, K1, K2 and [K1 + K2]/2 values were significantly different between the two devices (mean difference, K1: −0.05 ± 0.21 D; K2: −0.12 ± 0.20 D; [K1 + K2]/2: −0.08 ± 0.14 D. P <0.05. There was no statistically significant difference in AL and ACD between the two devices. The correlations of AL, K1, K2, and ACD between the two devices were high. The mean differences in IOL power calculations using the five formulas were not statistically significant between the two devices. Conclusions: New optical low-coherence reflectometry provides measurements that correlate well to those of partial coherence interferometry, thus it is a precise device that can be used for the

  5. Paediatric intraocular lens implants: accuracy of lens power calculations.

    Science.gov (United States)

    O'Gallagher, M K; Lagan, M A; Mulholland, C P; Parker, M; McGinnity, G; McLoone, E M

    2016-09-01

    PurposeThis study aims to evaluate the accuracy of lens prediction formulae on a paediatric population.MethodsA retrospective case-note review was undertaken of patients under 8 years old who underwent cataract surgery with primary lens implantation in a regional referral centre for paediatric ophthalmology, excluding those whose procedure was secondary to trauma. Biometric and refractive data were analysed for 43 eyes, including prediction errors (PE). Statistical measures used included mean absolute error (MAE), median absolute error (MedAE), Student's t-test and Lin's correlation coefficient.ResultsThe mean PE using the SRK-II formula was +0.96 D (range -2.47D to +2.41 D, SD 1.33 D, MAE 1.38 D, MedAE 1.55, n=15). The mean PE was smaller using SRK/T (-0.18 D, range -3.25 D to +3.95 D, SD 1.70 D, MAE 1.30 D, MedAE 1.24, n=27). We performed an analysis of the biometry data using four different formula (Hoffer Q, Holladay 1, SRK-II and SRK/T). Hoffer Q showed a smaller MedAE than other formulae but also a myopic bias.ConclusionOur clinical data suggest SRK/T was more accurate in predicting post-operative refraction in this cohort of paediatric patients undergoing cataract surgery. Hoffer Q may have improved accuracy further.

  6. A retrospective analysis of the first Indian experience on Artisan phakic intraocular lens

    Directory of Open Access Journals (Sweden)

    Senthil Sirisha

    2006-01-01

    Full Text Available Purpose: To evaluate the efficacy, safety, predictability and stability of implanting a polymethylmethacrylate phakic intraocular lens (PIOL in high myopia. Materials and Methods: A retrospective analysis of the data of patients who underwent Artisan phakic IOL implantation between 2002 and 2003 with a follow-up of at least 24 months. Results: An Artisan myopia lens was implanted in 60 eyes of 36 patients with preoperative myopia ranging from -5.0 to -24.0 D. Mean patient age was 22.6 years. Mean spherical equivalent of manifest refraction stabilized by the first postoperative week. At three months follow-up, 54 eyes (90% had a postoperative refraction within ± 1D emmetropia and 45 eyes (75% had uncorrected visual acuity of 20/40 or better. Seven eyes (11.6% had loss of one Snellen line and none had loss of two Snellen lines or more at three months. The mean endothelial cell loss was 3.8% at three months, 5.2% at six months, 5.25% at 12 months and 6.38% at two years, which was not significant. Postoperative complications included anterior chamber reaction in two eyes (3.3%, rise in intraocular pressure in six eyes (10% and dislocation of PIOL in two eyes (3.3%. Conclusion: Implantation of Artisan myopia lens to correct high myopia resulted in a stable and fairly predictable refractive outcome with few complications. Significant endothelial damage was not detected in two years of follow-up.

  7. Clinical Study of Crystal Posterior Chamber Intraocular Lens in Treatment of High Myopia%有晶体眼后房型人工晶体植入术治疗高度近视的临床研究

    Institute of Scientific and Technical Information of China (English)

    杨金永

    2015-01-01

    目的:观察有晶体眼后房型人工晶体植入治疗高度近视的临床应用价值。方法回顾性总结我院45例行有晶状体眼后房型人工晶体植入术高度近视患者,比较术前术后视力、眼压及并发症等指标。结果术后患者视力优于术前,P<0.05,差异具有统计学意义;患者眼压、角膜内皮细胞无改变,P>0.05,差异不具有统计学意义;术后未发现严重并发症。结论有晶体眼后房型人工晶体植入术疗效理想。%Objective To investigate the clinical effect of implantable collamer lens (ICL) in the treatment of high myopia.Methods Selected 45patients with high myopia were given ICL, compared visual acuity, intraocular pressure, complications and other indexes of pre-operation and post-operation.ResultsAfter surgery, patients are signiifcantly better than preoperative,P0.05, had no difference statistically signiifcance, no serious postoperative complications.Conclusion The ICL has a very signiifcant effect.

  8. Diffractive multifocal intraocular lens interferes with intraoperative view

    Directory of Open Access Journals (Sweden)

    Mami Yoshino

    2010-05-01

    Full Text Available Mami Yoshino1, Makoto Inoue1,2, Nae Kitamura1, Hiroko Bissen-Miyajima11Department of Ophthalmology, Tokyo Dental College Suidobashi Hospital, Tokyo, Japan; 2Kyorin Eye Center, Kyorin University School of Medicine, Tokyo, JapanAbstract: We report an unusual finding during vitreous surgery in an eye implanted with a diffractive multifocal intraocular lens (IOL. A 70-year-old woman reported gradual visual deterioration to 20/40 in the left eye two and a half years after uneventful cataract surgery with implantation of a diffractive multifocal IOL. Funduscopic examination showed an epiretinal membrane (ERM in the left eye. Increased macular traction was believed to cause the visual deterioration. Vitreous surgery with removal of the ERM was performed and triamcinolone acetonide (TA was injected intravitreally to visualize the residual vitreous cortex. Although the ERM was peeled successfully, the ability to focus on the vitreoretinal interface through the IOL required great effort with decreased contrast sensitivity and ghost images of the intravitreal TA crystals. The vision improved to 20/25 4 months postoperatively. Macular surgery can be performed in an eye with a diffractive multifocal IOL; however, decreased contrast sensitivity and ghost images may interfere with the intraoperative view through the diffractive IOL in complicated cases.Keywords: diffractive multifocal intraocular lens, intraoperative view

  9. Calcium-phosphate deposits on a hydrophilic acrylic intraocular lens after silicon oil tamponade

    Directory of Open Access Journals (Sweden)

    Rashid Alsaeidi

    2008-01-01

    Full Text Available We report a 52-year-old man who underwent uncomplicated cataract operation and posterior chamber lens implantation (hydrophilic acrylic lens in his left eye 5 years prior to presentation. Two years after surgery he developed pseudophakic retinal detachment which was successfully treated with pars plana vitrectomy and silicon oil tamponade. The silicon oil was removed one year after surgery. A year later he complained of increasing blurred vision in the left eye. Clinical examination revealed vesicular alterations located superficially on the intraocular lens (IOL, which could not be removed by perflourocarbon-perflourohexloctane lavage. As the patient complained about increasing visual impairment, the IOL was removed. The IOL was investigated by electronmicroscopy and biochemical analysis. During electron microscopy and following biochemical analysis the observed alterations were identified as calcium-phosphate particles located on the superficial aspect of the IOL. The occurrence of calcium-phosphate deposits on a posterior chamber IOL after silicon oil tamponade is a rare complication and has not been described so far. As these deposits interfere with visual acuity, removal of the lens has to be considered.

  10. Soft wearable contact lens sensor for continuous intraocular pressure monitoring.

    Science.gov (United States)

    Chen, Guo-Zhen; Chan, Ion-Seng; Leung, Leo K K; Lam, David C C

    2014-09-01

    Intraocular pressure (IOP) is a primary indicator of glaucoma, but measurements from a single visit to the clinic miss the peak IOP that may occur at night during sleep. A soft chipless contact lens sensor that allows the IOP to be monitored throughout the day and at night is developed in this study. A resonance circuit composed of a thin film capacitor coupled with a sensing coil that can sense corneal curvature deformation is designed, fabricated and embedded into a soft contact lens. The resonance frequency of the sensor is designed to vary with the lens curvature as it changes with the IOP. The frequency responses and the ability of the sensor to track IOP cycles were tested using a silicone rubber model eye. The results showed that the sensor has excellent linearity with a frequency response of ∼8 kHz/mmHg, and the sensor can accurately track fluctuating IOP. These results showed that the chipless contact lens sensor can potentially be used to monitor IOP to improve diagnosis accuracy and treatment of glaucoma.

  11. Retropupillary iris-claw intraocular lens in ectopia lentis in Marfan syndrome

    Science.gov (United States)

    Faria, Mun Yueh; Ferreira, Nuno; Neto, Eliana

    2016-01-01

    Objective To report visual outcomes, complication rate, and safety of retropupillary iris-claw intraocular lens (ICIOL) in ectopia lentis in Marfan syndrome (MFS). Design Retrospective study. Methods Six eyes of three MFS patients with ectopia lentis underwent surgery for subluxation lens and retropupillary ICIOL implantation from October 2014 to October 2015 at the Department of Ophthalmology, Santa Maria Hospital in Lisbon, Portugal. Demographics, preoperative and postoperative best-corrected visual acuity (BCVA), and intraocular pressure were evaluated. Endothelium cell count was assessed using specular microscopy; anterior chamber depth was measured using Pentacam postoperatively; and intraocular lens position was viewed by ultrasound biomicroscopy. All patients were female; mean age was 20±14.264 years (range: 7–38 years). Results The average follow-up period was 6.66 months (range: 4–16 months). Preoperative BCVA was 0.568±0.149 logMAR units, and postoperative BCVA was 0.066±0.121 logMAR units. The mean BCVA gain was −0.502±0.221 on the logMAR scale. Postoperative average astigmatism and intraocular pressure were 1.292±0.697 mmHg (range: 0.5–2.25 mmHg) and 16 mmHg (range: 12–18 mmHg), respectively. The average endothelial cell density decreased from 3,121±178 cells/mm2 before surgery to 2,835±533 cells/mm2 after surgery (measured at last follow-up visit) and in the last follow-up, representing an average endothelial cell loss of 9.16%. Mean anterior chamber depth was 4.01 mm (±0.77 mm), as measured by Pentacam. No complications were found intra- or postoperatively in any of the six studied eyes. Conclusion Retropupillary ICIOL implantation is a safe and effective procedure in the treatment of aphakia in MFS eyes, without capsular support after surgery for ectopia lens. The six eyes that underwent lensectomy and retropupillary ICIOL implantation have had excellent visual outcomes with no complications so far. PMID:27382335

  12. A knotless, one-haptic fixation of posterior chamber intraocular lenses: one-year results

    Institute of Scientific and Technical Information of China (English)

    Pipat; Kongsap

    2015-01-01

    AIM: To assess the results of a modified technique for scleral fixation of a posterior chamber intraocular lens(IOL) in eyes which had deficient of posterior capsular support.METHODS: This retrospective study was comprised of ten patients with deficient posterior capsular support who underwent one-haptic fixation of posterior chamber IOLs, between February 2010 and October 2011. IOL as implanted with one haptic supported on the capsular remnant and the other haptic drawn into the sulcus by anchoring suture without a knot. All patients were evaluated for pre- and postoperative visual acuity, lens centration, intra-and postoperative complications.RESULTS: A knotless, one-haptic fixation of posterior chamber IOLs has successfully been performed on ten eyes. All cases had inadequate capsular support(i.e. a capsular tear ranged from 5 to 7 clock hours). The average age was 74.25 ±8.87y(SD). The average postoperative uncorrected visual acuity was 0.51 log MAR.Complications included hyphema in one eye, a mild inflammatory reaction in the anterior chamber in two eyes, and a transient rise in IOP in one eye. Neither IOL tilt nor dislocation was observed and there were no later complications.CONCLUSION: In the presence of insufficient capsular support, a knotless, one-haptic fixation of posterior chamber IOLs is a safe and viable option which reduces the operation time, and minimizes postoperative suture-related complications.

  13. Comparison of visual outcomes after implantation of diffractive trifocal toric intraocular lens and a diffractive apodized bifocal toric intraocular lens

    Science.gov (United States)

    Gundersen, Kjell Gunnar; Potvin, Rick

    2016-01-01

    Purpose The aim of this study was to compare a new diffractive trifocal toric lens with an apodized diffractive bifocal toric lens in terms of refractive and visual acuity (VA) outcomes, including low-contrast VA (LCVA), as well as the patient’s visual function 3 months after implantation. Patients and methods This is a randomized prospective study involving bilateral implantation of a trifocal toric or a bifocal toric lens. At 3 months postoperatively, the subject’s vision was tested both uncorrected and with his/her best distance correction at: distance (4 m), intermediate (63 cm), and near (40 cm). Binocular defocus curves were measured with no correction and with the subject’s best distance correction in place. Quality of vision was measured using the National Eye Institute Visual Function Questionnaire. Results A total of 22 patients were enrolled (eleven in each group). There was no statistically significant difference in the absolute change in measured rotation between 1 month and 3 months postoperatively between the two intraocular lens (IOL) groups (P=0.98). At 3 months, the postoperative refraction and distance VA by eye were similar between groups. There was no statistically significant difference in the measured LCVA between groups (P=0.39). The defocus curve showed that at 67 cm, the trifocal toric lens had statistically significantly better VA when compared to the bifocal toric lens. There were no statistically significant differences by group for any of the National Eye Institute Visual Function Questionnaire scores (P>0.26 in all cases). Conclusion The trifocal toric IOL improved the intermediate vision without negatively impacting visual function and distance, near, or low-contrast VA when compared to a bifocal toric IOL. The toric component of the trifocal lens effectively reduced astigmatism and provided good rotational stability. PMID:27051269

  14. A capacitor-based sensor and a contact lens sensing system for intraocular pressure monitoring

    Science.gov (United States)

    Chiou, Jin-Chern; Huang, Yu-Chieh; Yeh, Guan-Ting

    2016-01-01

    This study proposes a capacitor-based sensor on a soft contact lens for the measurement of intraocular pressure (IOP). The sensor was designed and fabricated via microelectromechanical system fabrication technologies. The soft contact lens is designed to be worn on a cornea such that the curvature of the contact lens corresponds substantially to that of the cornea. In addition, the contact lens was fabricated via a cast-molding method using poly-2-hydroxyethyl methacrylate to achieve a lens with high oxygen permeability, which can be worn comfortably for a long time. An IOP sensor prototype was implemented, which exhibited 1.2239 pF mmHg-1 (13,171 ppm mmHg-1) sensitivity during measurements of an artificial anterior chamber at pressures between 18 and 30 mmHg. The results indicate that the developed capacitor-based IOP sensor exhibited high stability and reproducibility in a series of measurements performed under various pressures. The capacitance of the proposed IOP sensor can successfully be converted into a digital value via a capacitor-to-digital converter and be transmitted via a commercial wireless telemetry system in this study.

  15. Microscopic analysis of an opacified OFT CRYL® hydrophilic acrylic intraocular lens.

    Science.gov (United States)

    Ventura, Bruna Vieira; MacLean, Kyle Douglas; Lira, Wagner; Oliveira, Daniele Mendes de; Ventura, Camila Vieira; Werner, Liliana

    2016-01-01

    A 51-year-old patient underwent posterior vitrectomy with perfluoropropane gas injection, phacoemulsification, and implantation of an Oft Cryl® hydrophilic acrylic intraocular lens (IOL) because of traumatic retinal detachment and cataract in the right eye. On the first postoperative day, gas was filling the anterior chamber because of patient's non-compliance in terms of head positioning, and was reabsorbed within one week. Eight months later, the patient returned complaining of a significant decrease in vision. IOL opacification was noticed by slit-lamp examination. The lens was explanted to undergo gross and light microscopic analysis. The lens was also stained with the alizarin red method for calcium identification. Light microscopic analysis confirmed the presence of granular deposits, densely distributed in an overall circular pattern in the central part of the lens optic. The granules stained positive for calcium. This is the first case of the opacification of this type of hydrophilic lens. Surgeons should be aware of this potential postoperative complication, and the use of hydrophilic IOLs should be avoided in procedures involving intracameral gas because of the risk of IOL opacification.

  16. Design of a Test Bench for Intraocular Lens Optical Characterization

    Energy Technology Data Exchange (ETDEWEB)

    Alba-Bueno, Francisco; Vega, Fidel; Millan, Maria S, E-mail: francisco.alba-bueno@upc.edu, E-mail: fvega@oo.upc.edu, E-mail: millan@oo.upc.edu [Departamento de Optica y Optometria, Universidad Politecnica de Cataluna, C/ Violinista Vellsola 37, 08222 Terrassa (Spain)

    2011-01-01

    The crystalline lens is the responsible for focusing at different distances (accommodation) in the human eye. This organ grows throughout life increasing in size and rigidity. Moreover, due this growth it loses transparency through life, and becomes gradually opacified causing what is known as cataracts. Cataract is the most common cause of visual loss in the world. At present, this visual loss is recoverable by surgery in which the opacified lens is destroyed (phacoemulsification) and replaced by the implantation of an intraocular lens (IOL). If the IOL implanted is mono-focal the patient loses its natural capacity of accommodation, and as a consequence they would depend on an external optic correction to focus at different distances. In order to avoid this dependency, multifocal IOLs designs have been developed. The multi-focality can be achieved by using either, a refractive surface with different radii of curvature (refractive IOLs) or incorporating a diffractive surface (diffractive IOLs). To analyze the optical quality of IOLs it is necessary to test them in an optical bench that agrees with the ISO119679-2 1999 standard (Ophthalmic implants. Intraocular lenses. Part 2. Optical Properties and Test Methods). In addition to analyze the IOLs according to the ISO standard, we have designed an optical bench that allows us to simulate the conditions of a real human eye. To do that, we will use artificial corneas with different amounts of optical aberrations and several illumination sources with different spectral distributions. Moreover, the design of the test bench includes the possibility of testing the IOLs under off-axis conditions as well as in the presence of decentration and/or tilt. Finally, the optical imaging quality of the IOLs is assessed by using common metrics like the Modulation Transfer Function (MTF), the Point Spread Function (PSF) and/or the Strehl ratio (SR), or via registration of the IOL's wavefront with a Hartmann-Shack sensor and its

  17. Design of a Test Bench for Intraocular Lens Optical Characterization

    Science.gov (United States)

    Alba-Bueno, Francisco; Vega, Fidel; Millán, María S.

    2011-01-01

    The crystalline lens is the responsible for focusing at different distances (accommodation) in the human eye. This organ grows throughout life increasing in size and rigidity. Moreover, due this growth it loses transparency through life, and becomes gradually opacified causing what is known as cataracts. Cataract is the most common cause of visual loss in the world. At present, this visual loss is recoverable by surgery in which the opacified lens is destroyed (phacoemulsification) and replaced by the implantation of an intraocular lens (IOL). If the IOL implanted is mono-focal the patient loses its natural capacity of accommodation, and as a consequence they would depend on an external optic correction to focus at different distances. In order to avoid this dependency, multifocal IOLs designs have been developed. The multi-focality can be achieved by using either, a refractive surface with different radii of curvature (refractive IOLs) or incorporating a diffractive surface (diffractive IOLs). To analyze the optical quality of IOLs it is necessary to test them in an optical bench that agrees with the ISO119679-2 1999 standard (Ophthalmic implants. Intraocular lenses. Part 2. Optical Properties and Test Methods). In addition to analyze the IOLs according to the ISO standard, we have designed an optical bench that allows us to simulate the conditions of a real human eye. To do that, we will use artificial corneas with different amounts of optical aberrations and several illumination sources with different spectral distributions. Moreover, the design of the test bench includes the possibility of testing the IOLs under off-axis conditions as well as in the presence of decentration and/or tilt. Finally, the optical imaging quality of the IOLs is assessed by using common metrics like the Modulation Transfer Function (MTF), the Point Spread Function (PSF) and/or the Strehl ratio (SR), or via registration of the IOL's wavefront with a Hartmann-Shack sensor and its

  18. Clinical study of customized aspherical intraocular lens implants

    Institute of Scientific and Technical Information of China (English)

    Lie-Xi; Jia; Zhao-Hui; Li

    2014-01-01

    AIM:To compare if there is an improvement in visual functions with age-related cataracts between patients receiving a aspherical intraocular lens(IOL) based on corneal wavefront aberration and patients randomly assigned lenses.METHODS:A total of 124 eyes of 124 patients with age-related cataracts were placed in experimental group and a group receiving randomly assigned(RA) lenses.The experimental group was undergone Pentacam corneal spherical aberration measurement before surgery; the targeted range for residual total spherical aberration after surgery was set to 0-0.3 μm. Patients with a corneal spherical aberration <0.3 μm were implanted with a zero-spherical aberration advanced optics(AO) aspherical IOL and patients with an aberration ≥0.3 μm received a Tecnis Z9003 aspherical lens in experimental group. RA patients were randomly implanted with an AO lens or a Tecnis Z9003 lens. Three months after surgery total spherical aberration, photopic/mesopic contrast sensitivities, photopic/mesopic with glare contrast sensitivities, and logMAR vision were measured.RESULTS:Statistical analysis on logMAR vision showed no significant difference between two groups(P =0.413). The post-surgical total spherical aberration was 0.126 ±0.097 μm and 0.152 ±0.151 μm in the experimental and RA groups, respectively(P =0.12). The mesopic contrast sensitivities at spatial frequencies of 6,12 and 18 c/d in the experimental group were significantly higher than of the RA group(P =0.00; P =0.04;P =0.02). The mesopic with glare contrast sensitivity in the experimental group at a spatial frequency of 18 c/d was also significantly higher vs the RA group(P =0.01).CONCLUSION:Pre-surgical corneal spherical aberration measurement in cataract patients followed bycustomized selection of aspherical IOL implants improved mesopic contrast sensitivities at high spatial frequencies, and thus is a superior strategy compared to the random selection of aspherical intraocular lens implants.

  19. Optical quality of toric intraocular lens implantation in cataract surgery

    Institute of Scientific and Technical Information of China (English)

    Xian-Wen; Xiao; Jing; Hao; Hong; Zhang; Fang; Tian

    2015-01-01

    AIM: To analyze the optical quality after implantation of toric intraocular lens with optical quality analysis system.METHODS: Fifty-two eyes of forty-four patients with regular corneal astigmatism of at least 1.00 D underwent implantation of Acry Sof toric intraocular lens, including T3 group 19 eyes, T4 group 18 eyes, T5 group 10 eyes,T6 group 5 eyes. Main outcomes evaluated at 3mo of follow-up, included uncorrected distance visual acuity(UDVA), corrected distance visual acuity(CDVA), residual refractive cylinder and intraocular lens(IOL) axis rotation.Objective optical quality were measured using optical quality analysis system(OQAS Ⅱ, Visiometrics, Spain),included the cutoff frequency of modulation transfer function(MTFcutoff), objective scattering index(OSI),Strehl ratio, optical quality analysis system value(OV)100%, OV 20% and OV 9% [the optical quality analysis system(OQAS) values at contrasts of 100%, 20%, and 9%].RESULTS: At 3mo postoperative, the mean UDVA and CDVA was 0.18 ±0.11 and 0.07 ±0.08 log MAR; the mean residual refractive cylinder was 0.50 ±0.29 D; the mean toric IOL axis rotation was 3.62 ±1.76 degrees, the mean MTFcutoff, OSI, Strehl ratio, OV 100%, OV 20% and OV9% were 22.862 ±5.584, 1.80 ±0.84, 0.155 ±0.038, 0.76 ±0.18,0.77±0.19 and 0.78±0.21. The values of UDVA, CDVA, IOL axis rotation, MTFcutoff, OSI, Strehl ratio, OV100%,OV20% and OV9% depending on the power of the cylinder of the implantation were not significantly different(P >0.05), except the residual refractive cylinder(P <0.05).CONCLUSION: The optical quality analysis system was useful for characterizing the optical quality of Acry Sof toric IOL implantation. Implantation of an Acry Sof toric IOL is an effective and safe method to correct corneal astigmatism during cataract surgery.

  20. The Relation of the Location of Haptics of Posterior Chamber Intraocular Lenses and Peripheral Anterior Synechia

    Institute of Scientific and Technical Information of China (English)

    RuiduanLiao; ShaozhenLi

    1995-01-01

    Purpose:To investigate the occurrence,outcome and influencial factors of the pe-ripheral anterior synechia(PAS)following implantation of posterior chamber in-traocular lenses for finding a way to reduce thePAS.Subjects;40 eyes of 38senile cataract patients with normal chamber angle and in-traocular pressue(IOP)preoperatively were examined.Methods:Extracapsular cataract extraction was performed under microscope with insertion of a posterior chamber lens implant vaulted anteriorly by 10°.Go-nioscopy and slit-lamp examination and photography of the operated eyes were performed 3to 6months postoperatively.Results:PAS were found in 20(50%)of the 40eyes.Among the 20eyes with PAS the locations of 23haptics in17eyes corresponded with those of the PAS.PAS were seen more frequently with vertically sulcus-fixated haptics than with the horizontally capsular-fixated haptics.showing a significant difference(P<0.05).88%of the eyes withPAS had pupillary edformation,but their visual acuities and IOP were not affected.Conclusions:PAS is more likely to occur with vertically sulcus-fixated IOL.Rotat-ing the capsular-fixated haptics to the horizontal position may reduce the inci-dence of PAS.Gonioscopy should be a routine follow-up examination.

  1. Multifocal Toric Intraocular Lens for Traumatic Cataract in a Child

    Directory of Open Access Journals (Sweden)

    Yanfeng Zeng

    2016-10-01

    Full Text Available A child suffering from traumatic cataract and corneal astigmatism of 2.14 D had a phacoemulsification operation and implantation of a ReSTOR Toric intraocular lens (IOL to correct the astigmatism. The primary outcome measurements were the uncorrected distance visual acuity (UDVA, uncorrected near vision at 40 cm, intraocular pressure, spherical equivalent refraction, residual astigmatism, corneal astigmatism, presence of unusual optical phenomena, and use of spectacles. At 7 months postoperatively, UDVA was maintained between 16/20 and 24/20, near vision was between J1 and J3, residual spherical refraction was 0–0.37 D, and residual refractive cylinder was between 0 and 0.67 D. A multifocal toric IOL can provide the possibility of satisfactory vision for both distant and near conditions without the use of spectacles to meet children’s needs when studying and doing sports. Additionally, binocular vision can be reconstructed. This intervention, therefore, seems to be a satisfactory alternative.

  2. Toric intraocular lens orientation and residual refractive astigmatism: an analysis

    Directory of Open Access Journals (Sweden)

    Potvin R

    2016-09-01

    Full Text Available Rick Potvin,1 Brent A Kramer,2 David R Hardten,3 John P Berdahl4 1Science in Vision, Akron, NY, 2University of Iowa Carver College of Medicine, Iowa City, IA, 3Minnesota Eye Consultants, Minnetonka, MN, 4Vance Thompson Vision, Sioux Falls, SD, USA Purpose: To analyze intraocular lens (IOL orientation data from an online toric back-calculator (astigmatismfix.com for determining if differences were apparent by lens type.Methods: A retrospective review of astigmatismfix.com toric back-calculations that included IOL identification and intended orientation axis.Results: Of 12,812 total validated calculation records, 8,229 included intended orientation and lens identification data. Of the latter, 5,674 calculations (69% involved lenses oriented 5° or more from their intended position. Using estimated toric lens usage data, the percentage of lenses with orientation ≥5° from intended was 0.89% overall, but the percentage varied significantly between specific toric lens brands (P<0.05. The percentage of back-calculations related to lenses that were not oriented as intended was also statistically significantly different by lens brand (P<0.05. When IOLs were misoriented, they were significantly more likely to be misoriented in a counterclockwise direction (P<0.05. This was found to be due to a bias toward counterclockwise orientation observed with one specific brand, a bias that was not observed with the other three brands analyzed here.Conclusion: The percentage of eyes with lens orientation ≥5° from intended in the Toric Results Analyzer data set was <1% of toric IOLs in general, with the relative percentage of Tecnis® Toric IOLs significantly higher than AcrySof® Toric IOLs. Both of these had higher rates than the Staar® Toric and Trulign® Toric lenses, with the availability of higher Tecnis and AcrySof cylinder powers a likely contributing factor. The AcrySof Toric IOL appears to be less likely than the Tecnis Toric IOL to cause residual

  3. 晶状体半脱位白内障术中两类折叠型 lOL做悬吊术的疗效比较%Observation of two types of foldable scleral - fixated posterior chamber intraocular lens to treat cataract dislocation

    Institute of Scientific and Technical Information of China (English)

    邓芳祝; 邝国平

    2014-01-01

    AlM:To observe the clinical efficacy of two types of scleral-fixated posterior chamber intraocular lens ( lOL ) combined intra-capsule lens extraction to treat cataract dislocation. METHODS: After intra - capsule lens extraction of dislocated cataract, two types of lOL were used as scleral-fixated posterior chamber lOL . First group was with four seal loops, the second group was with two open loops. All 21 patients (23 eyes) took the examination of the best corrected visual acuity, intraocular pressure, fundus, and lOL decentration using camera system attached to slit - lamp ophthalmoscope and lOL tilted using ultrasound biomicroscopy (UBM) at 6mo after surgery.RESULTS: After 6mo, all patients had improved eye sight. There was significant difference in the mean lOL decentration between the two groups ( 0. 57mm vs 0. 79mm, P CONCLUSlON: lOL with four loops are more appropriate as scleral-fixated posterior chamber lOL with less tiltness and dicentration.%目的:探讨囊内摘除联合两类人工晶状体( intraocular lens,IOL)做悬吊术治疗晶状体半脱位白内障的临床疗效。  方法:晶状体半脱位患者21例23眼,行晶状体囊内摘除前部玻璃体切割联合IOL悬吊术,依植入IOL类别分为四个闭合襻IOL组和两个C襻IOL组,术后观察视力、眼压、综合验光、眼底,6mo时裂隙灯眼前节摄像系统拍照确定 IOL 偏心值,超声生物显微镜( ultrasound biomicroscopy,UBM)检查确定IOL的倾斜度检查。  结果:所有患眼术后视力均有不同程度的提高。四襻组IOL平均偏心为0.57mm,两襻组平均偏心0.79mm;四襻组IOL平均倾斜度为6°,两襻组平均倾斜度11°,两组间差异均有统计学意义(P  结论:晶状体半脱位术中四个闭合襻IOL做悬吊术后居中性更好,IOL倾斜度更小。

  4. Experimental study on cyclosporine A drug delivery system in prevention of posterior capsule opacification after intraocular lens implantation in rabbits

    Institute of Scientific and Technical Information of China (English)

    Pei Cheng; Sun Naixue

    2008-01-01

    Objective To study the effect of cyclosporine A drug delivery system (CsA-DDS) on the prevention of posterior capsule opacification (PCO) after experimental intraocular lens implantation in rabbit eyes. Methods Twenty healthy New Zealand white rabbits, whose left eyes and right eyes were used respectively as experiment eyes and controls, were subjected to extracapsular lens extraction and artificial lens implantation. During the operation, CsA-DDS with poly (lactideco-glycolide) as carriers or empty DDS was implanted in the capsular bag for the experimental eyes and controls respectively. After the operation, anterior chamber reaction, intraocular pressure (IOP) and CsA concentration were monitored and twelve weeks after the operation, the eyes were extracted for histopathological and morphological examinations. Results There were no differences between the two groups in conjunctival congestion,IOP change and anterior chamber reaction. PCO was less severe in the experimental eyes than in the controls. Light microscopy revealed that posterior capsular membrane in the experimental eyes was slick, with no obvious proliferation,whereas in the controls, there were lens epithelial cell proliferation and cortex regeneration of different degrees.Morphological examination with electron microscope showed that in the experimental eyes, lens epithelial cells did not function actively and apoptosis occurred, whereas in the controls, epithelial cells presented active function. No marked ultrastructural changes were found in either group. Conclusion Cs-DDS can inhibit PCO after intraocular lens implantation in rabbit eyes and does not have toxic effects on the surrounding ocular tissues. Therefore, it has a good potential for clinical use in prevention of PCO.

  5. Pupillary block glaucoma following implantation of a posterior chamber pseudophakos in the anterior chamber.

    Directory of Open Access Journals (Sweden)

    Mandal Anil

    2002-01-01

    Full Text Available Pupillary block glaucoma is a common complication of cataract surgery, especially following anterior chamber intraocular lens implantation. We report a case of pupillary block glaucoma with a posterior chamber IOL that was implanted in the anterior chamber following a complicated extracapsular cataract extraction. The case was successfully managed by explantation of the posterior chamber lens, anterior vitrectomy, peripheral iridectomy and secondary anterior chamber intraocular lens implantation. The intraocular pressure was controlled with a single topical antiglaucoma medication.

  6. Spectral analysis and comparison of mineral deposits forming in opacified intraocular lens and senile cataractous lens

    Science.gov (United States)

    Lin, Shan-Yang; Chen, Ko-Hwa; Lin, Chih-Cheng; Cheng, Wen-Ting; Li, Mei-Jane

    2010-10-01

    This preliminary report was attempted to compare the chemical components of mineral deposits on the surfaces of an opacified intraocular lens (IOL) and a calcified senile cataractous lens (SCL) by vibrational spectral diagnosis. An opacified intraocular lens (IOL) was obtained from a 65-year-old male patient who had a significant decrease in visual acuity 2-years after an ocular IOL implantation. Another SCL with grayish white calcified plaque on the subcapsular cortex was isolated from a 79-year-old male patient with complicated cataract after cataract surgery. Optical light microscope was used to observe both samples and gross pictures were taken. Fourier transform infrared (FT-IR) and Raman microspectroscopic techniques were employed to analyze the calcified deposits. The curve-fitting algorithm using the Gaussian function was also used to quantitatively estimate the chemical components in each deposit. The preliminary results of spectral diagnosis indicate that the opacified IOL mainly consisted of the poorly crystalline, immature non-stoichiometric hydroxyapatite (HA) with higher content of type B carbonated apatites. However, the calcified plaque deposited on the SCL was comprised of a mature crystalline stoichiometric HA having higher contents of type A and type B carbonate apatites. More case studies should be examined in future.

  7. Energy Efficiency of a New Trifocal Intraocular Lens

    Science.gov (United States)

    Vega, F.; Alba-Bueno, F.; Millán, M. S.

    2014-01-01

    The light distribution among the far, intermediate and near foci of a new trifocal intraocular lens (IOL) is experimentally determined, as a function of the pupil size, from image analysis. The concept of focus energy efficiency is introduced because, in addition to the theoretical diffraction efficiency of the focus, it accounts for other factors that are naturally presented in the human eye such as the level of spherical aberration (SA) upon the IOL, light scattering at the diffractive steps or the depth of focus. The trifocal IOL is tested in-vitro in two eye models: the aberration-free ISO model, and a so called modified-ISO one that uses an artificial cornea with positive spherical SA in instead. The SA upon the IOL is measured with a Hartmann-Shack sensor and compared to the values of theoretical eye models. The results show, for large pupils, a notorious reduction of the energy efficiency of the far and near foci of the trifocal IOL due to two facts: the level of SA upon the IOL is larger than the value the lens is able to compensate for and there is significant light scattering at the diffractive steps. On the other hand, the energy efficiency of the intermediate focus for small pupils is enhanced by the contribution of the extended depth of focus of the near and far foci. Thus, while IOLs manufacturers tend to provide just the theoretical diffraction efficiency of the foci to show which would be the performance of the lens in terms of light distribution among the foci, our results put into evidence that this is better described by using the energy efficiency of the foci.

  8. The effects on intraocular pressure, chamber angle and number of corneal endothelial cells after the implantation of iris clip lens in children%儿童虹膜夹持型人工晶状体植入术后眼压、房角和角膜内皮的影响

    Institute of Scientific and Technical Information of China (English)

    朱邵品; 邵新香; 范可顺

    2013-01-01

    Objective To discuss the efficacy and safety of clinical application of children's iris clip lens by analyzing the changes of postoperative intraocular pressure, chamber angle and number of corneal endothelial cells. Methods 21 cases (30 eyes) , whose posterior chamber were unable to be implanted with artificial lens because of absence of posterior capsule, were managed by implanting iris clip lens . The changes of postoperative visual acuity, ocular pressure, number of comeal endothelial cells, and chamber angle were studied. Results All patients were followed up, ranging from 3-12 moths (medium: 6months). Improvement of postoperative visual (0. 1~1.0) and normal ocular pressure(11~20 mm Hg)were achieved for all patients. Secondary glaucoma was not observed. The number of corneal endothelial cells and chamber angle by UBM were unchanged postoperatively. Conclusion Implantation of iris clip lens, which is easily manipulated , with short surgical duration and less complications , was proved to be efficient and safe , when difficulty is met with routine implantation of artificial lens in posterior chamber. The most advantage of this procedure is no decrease of corneal endothelial cells postoperatively and no influence on chamber angle and vitreous body intraoperatively.%目的 总结分析儿童虹膜夹持型人工晶状体植入术后眼压、房角和角膜内皮的变化,探讨临床应用的有效性和安全性.方法 21例(30只眼)患者中,钝挫伤晶状体脱位2例,马-凡综合征晶状体脱位8例,外伤性白内障术后无晶状体眼4例,先天性白内障术后无晶状体眼7例.均无后囊支撑,无法行后房人工晶状体植入而应用虹膜夹持型人工晶状体植入术.术后观察视力、眼压、角膜内皮计数、房角改变等.结果 随访3~12月(平均6个月),术后视力0.1~1.0,均较术前明显提高;眼压正常11 ~20 mm Hg,无继发性青光眼;角膜内皮细胞计数无明显变化;超声生物显微镜

  9. Capsular Outcomes After Pediatric Cataract Surgery Without Intraocular Lens Implantation

    Science.gov (United States)

    Tan, Xuhua; Lin, Haotian; Lin, Zhuoling; Chen, Jingjing; Tang, Xiangchen; Luo, Lixia; Chen, Weirong; Liu, Yizhi

    2016-01-01

    Abstract The objective of this study was to investigate capsular outcomes 12 months after pediatric cataract surgery without intraocular lens implantation via qualitative classification and quantitative measurement. This study is a cross-sectional study that was approved by the institutional review board of Zhongshan Ophthalmic Center of Sun Yat-sen University in Guangzhou, China. Digital coaxial retro-illumination photographs of 329 aphakic pediatric eyes were obtained 12 months after pediatric cataract surgery without intraocular lens implantation. Capsule digital coaxial retro-illumination photographs were divided as follows: anterior capsule opening area (ACOA), posterior capsule opening area (PCOA), and posterior capsule opening opacity (PCOO). Capsular outcomes were qualitatively classified into 3 types based on the PCOO: Type I—capsule with mild opacification but no invasion into the capsule opening; Type II—capsule with moderate opacification accompanied by contraction of the ACOA and invasion to the occluding part of the PCOA; and Type III—capsule with severe opacification accompanied by total occlusion of the PCOA. Software was developed to quantitatively measure the ACOA, PCOA, and PCOO using standardized DCRPs. The relationships between the accurate intraoperative anterior and posterior capsulorhexis sizes and the qualitative capsular types were statistically analyzed. The DCRPs of 315 aphakic eyes (95.8%) of 191 children were included. Capsular outcomes were classified into 3 types: Type I—120 eyes (38.1%); Type II—157 eyes (49.8%); Type III—38 eyes (12.1%). The scores of the capsular outcomes were negatively correlated with intraoperative anterior capsulorhexis size (R = −0.572, P < 0.001), but no significant correlation with intraoperative posterior capsulorhexis size (R = −0.16, P = 0.122) was observed. The ACOA significantly decreased from Type I to Type II to Type III, the PCOA increased in size from Type I to Type

  10. Clinical observation on the manual small incision cataract surgery combined with rigid posterior chamber intraocular lens implantation performed by medical team in Africa%援非洲医疗队手法小切口白内障手术效果观察

    Institute of Scientific and Technical Information of China (English)

    郎莉莉; 陈建梅; 崔红平

    2016-01-01

    Objective To investigate the clinical effects of manual small incision cataract surgery combined with rigid posterior chamber intraocular lens implantation in 376 Moroccan cataract cases performed by medical team in Africa.Methods From March 2013 to February 2015 in Morocco,432 eyes of 376 Moroccan patients had undertaken manual small incision cataract surgery combined with rigid posterior chamber lens implantation.The postoperative visual acuity,intraoperative and postoperative complications were analyzed.Results The visual acuities at ≤0.04 were obtained in 9 eyes (2.08%),0.05 ~ 0.25 in 65 eyes(15.05%),0.3 ~0.5 in 236 eyes(54.63%),and≥0.6 in 122 eyes(28.24%) at 1 week postoperatively.The intraoperative complications were stated as follows.The posterior capsular rupture and vitreous prolapse occurred in 28 eyes (6.48%) with nucleus fallen into vitreous cavity in 1 eye,among which 22 eyes were applied posterior chamber lens implantation at stage Ⅰ,the intraocular lens had not been implanted in 6 eyes.Nine eyes (2.08%) complicated with iris prolapse and 12 eyes (2.78%) with progressive miosis.Two eyes(0.46%) complicated with iridodialysis which was sutured intraoperatively.The postoperative complications included the following items.At 1 week postoperatively,corneal edema occurred in 78 eyes(18.06%).The anterior chamber inflammatory responses occurred in 52 eyes(12.04%).The irregular pupil was noticed in 35 eyes (8.10%).The vitreous hemorrhage occurred in 1 eyes(0.23%)which was related to diabetic retinopathy.Other complications were not observed,such as endophthalmitis,secondary glaucoma,intraocular lens dislocation or bullous keratopathy.Conclusion Manual small incision cataract surgery combined with rigid posterior chamber lens implantation is an optimal cataract surgical method in some poverty-striken districts of Africa with the advantages of safety,effectiveness,satisfied results and low cost.And Chinese medical team also

  11. A case of Alagille syndrome complicated by intraocular lens subluxation and rhegmatogenous retinal detachment

    Directory of Open Access Journals (Sweden)

    Fukumoto M

    2013-07-01

    Full Text Available Masanori Fukumoto, Tsunehiko Ikeda, Tetsuya Sugiyama, Mari Ueki, Takaki Sato, Eisuke Ishizaki Department of Ophthalmology, Osaka Medical College, Takatsuki City, Japan Abstract: This case report describes a case of Alagille syndrome with developing intraocular lens subluxation and rhegmatogenous retinal detachment 4 years after cataract surgery. A 15-year-old female patient with Alagille syndrome-associated cataracts in both eyes underwent phacoemulsification aspiration and intraocular lens implantation. Four years postoperative, intraocular lens subluxation developed in her left eye. For treatment, extraction of the dislocated intraocular lens, anterior vitrectomy, and intraocular lens fixation was performed. Three weeks later, the patient developed rhegmatogenous retinal detachment, which was well-treated by pars plana vitrectomy. Cataract surgery needs to be performed carefully in patients with Alagille syndrome due to the weakness of the zonule of Zinn. Careful postoperative observation is necessary for patients with Alagille syndrome who have undergone intraocular surgery in order to facilitate early detection of a possible rhegmatogenous retinal detachment. Keywords: Alagille syndrome, cataract, retina, surgery

  12. Results of Posterior Chamber Lens Implantation for Correction of Myopia

    Directory of Open Access Journals (Sweden)

    Pınar Sorgun Evcili

    2012-10-01

    Full Text Available Pur po se: To evaluate the results of posterior chamber phakic intraocular lens implantation in myopic patients. Ma te ri al and Met hod: Posterior chamber phakic intraocular lens (STAAR ICL implantation was performed in 58 eyes of 33 patients with mean spherical equivalent of -13.12±5.31 diopters (D (-2.5 - -24.75 D between August 2007 and October 2010 at Dr. Lütfi Kırdar Kartal Training and Research Hospital, Second Eye Clinic. The mean age of the patients was 32.84 ± 9.95 years (18-55 years - 24 (72.7% were male and 9 (27.3% were female. The study was designed as prospective case series. The patients were evaluated regarding visual acuity, refraction, endothelial cell count, and complications in postoperative period. Re sults: The mean follow-up time was 21.5±4.9 (12-24 months months. The mean spherical equivalent was -1.29±1.53 D (-5.6 D - +2.60 D at the last postoperative follow-up visit. Visual acuity was better or equal to preoperative best-corrected value in 42 (72.4% of eyes at the last follow-up visit postoperatively. Mean spherical equivalent was regressed to -1.13±1.59D at 1-month and -1.39±1.53D at 24-month postoperative follow-up visit. Pupillary-block glaucoma in 1 eye (1.7%, anterior subcapsular opacification not affecting the vision in 4 eyes, and retinal detachment in 1 eye were detected at follow-up visits. Dis cus si on: ICL implantation was observed to be an effective and safe method for correction of myopia in two-year follow-up. As possible retinal complications may develop, the patients must be followed carefully during the preoperative and postoperative period. (Turk J Ophthalmol 2012; 42: 349-54

  13. Reverse Optic Capture to Stabilize a Toric Intraocular Lens

    Directory of Open Access Journals (Sweden)

    Howard V. Gimbel

    2013-09-01

    Full Text Available Purpose: To describe a technique for stabilizing a rotationally unstable toric intraocular lens (IOL. Method: Case report and literature review. Results: Surgical technique and long-term follow-up for a patient who underwent repositioning and stabilization of a mobile 1-piece acrylic toric IOL using reverse optic capture (ROC are described. This patient presented with early, more than 70° off-axis rotation. The IOL was repositioned but was very mobile within the bag and tended to rotate off-axis; hence, it was stabilized in the desired position by capturing the optic through the anterior continuous curvilinear capsulorhexis, leaving the haptics in the bag. The immediate and 2-year postoperative follow-up revealed a stable and on-axis IOL with no visual, refractive or ocular complications. Conclusions: ROC is a useful and safe technique to address the problem of toric IOLs that tend to rotate at the time of surgery or are not stable postoperatively.

  14. Sutureless intrascleral intraocular lens fixation with lamellar dissection of scleral tunnel

    Directory of Open Access Journals (Sweden)

    Kawaji T

    2016-01-01

    Full Text Available Takahiro Kawaji,1,2 Tomoki Sato,2 Hidenobu Tanihara11Department of Ophthalmology, Faculty of Life Sciences, Kumamoto University, Chuo-ku, 2Sato Eye & Internal Medicine Clinic, Kumamoto, JapanPurpose: To report the results of sutureless scleral fixation of a posterior chamber intraocular lens (IOL by using our developed simple technique.Methods: We retrospectively reviewed the medical records of 48 eyes of 47 patients who underwent sutureless intrascleral IOL fixation by using our modified technique. A 25-gauge microvitreoretinal knife was used to perform sclerotomies and create limbus-parallel scleral tunnels with lamellar dissection in which the haptics were fixed.Results: The IOLs were fixed and centered well. The mean follow-up period was 26.7 months. Postoperative complications included smooth vitreous hemorrhage in four eyes (8.3%, cystoid macular edema in two eyes (4.2%, and iris capture of the IOL in two eyes (4.2%. No other complications, such as breakage of the IOL, spontaneous IOL dislocation, or retinal detachment, were detected during the follow-up period.Conclusion: The lamellar dissection of the limbus-parallel scleral tunnel can simplify the forceps-assisted introduction of the haptics into the scleral tunnel, and this technique seemed to be safe.Keywords: intraocular lenses, ophthalmologic surgical procedures, intrascleral fixation, sutureless fixation

  15. Bilateral transient pupil closure after iris supported intraocular lens implantation in a case with Marfan syndrome

    Directory of Open Access Journals (Sweden)

    Necip Kara

    2012-01-01

    Full Text Available A 16-year-old woman presented with Marfan syndrome and bilateral ectopia lentis. The surgical treatment including removal of the crystalline lens and implantation of an iris-supported intraocular lens in both eyes at a week interval. Postoperatively, the biomicroscopic examination showed total pupil closure bilaterally. After the topical tropicamide treatment, the pupil returned to normal shape.

  16. A rapid method for measuring intraocular lens power in vitro with a focimeter.

    Science.gov (United States)

    García-Domene, Mari Carmen; Díez-Ajenjo, María Amparo; Peris-Martínez, Cristina; Navea, Amparo; Artigas, José María

    2015-11-01

    In this paper we describe a new method for measuring the intraocular lens (IOL) power using a focimeter, a negative ophthalmic lens and a saline solution (0.9% NaCl). To test this we measured the power of 58 different IOLs and we compared them with the power stated by the manufacturer. Despite the limitations, the results show a good correlation.

  17. 外伤性晶状体全脱位人工晶状体缝线固定术%Suture fixation of intraocular lens for traumatic complete luxation of lens

    Institute of Scientific and Technical Information of China (English)

    陈海英; 李健; 黄正如

    2015-01-01

    目的 评价玻璃体切除联合人工晶状体巩膜缝线固定植入术对外伤性晶状体全脱位的疗效.方法 回顾性分析外伤性晶状体全脱位56例(56跟)经玻璃体晶状体切除联合人工晶状体缝线固定植入术后的眼压、视力、并发症等情况.结果 术后6个月术眼眼压低于术前,视力显著提高(P=0.00),无严重并发症.结论 玻璃体晶状体切除联合注射式人工晶状体巩膜缝线植入术能有效治疗外伤性晶状体脱位.%Objective To evaluate the efficacy of vitrectomy and lensectomy followed with primary implantation of scleral-fixated posterior chamber intraocular lens for the treatment of traumatic complete luxation of lens.Methods The intraocular pressure,visual acuity,and complications of 56 eyes of 56 cases with traumatic lens dislocation who underwent vitrectomy,lensectomy,and primary implantation of scleral-fixated posterior chamber intraocular lens were analysed retrospectively.Results The condition of intraocular pressure after the surgery was better than that before the surgery and the visual acuity improved significantly compared with that of pre-operation (P =0.00).There was no serious complication 6 months after the operation.Conclusion Vitrectomy and lensectomy followed with primary implantation of scleralfixated posterior chamber intraocular lens for the treatment of traumatic lens dislocation is effective.

  18. Comparison of Trans-scleral Fixation of PMMA and Foldable Intraocular Lens in Children

    Institute of Scientific and Technical Information of China (English)

    Yuping Zou; Zhende Lin; Bo Feng; Shaozhen Li

    2001-01-01

    Purpose: To observe the difference of the effects of PMMA and foldable intraocular lenses (IOLs) trans-sclerally fixed in pediatric eyes. Methods: Thirty-two children (43 eyes) who had undergone trans-scleral fixation of IOL were retrospected, of whom 5 children were implanted PMMA IOL in both eyes, 6children were implanted PMMA IOL in one eye and foldable IOL in the other eye, 12children were implanted foldable IOL in one eye and 9 chilrden were implanted PMMA IOL in one eye. Mean age was 5.3 years ( range 2.5 ~ 12 years ). Twelve children had traumatic cataract and the others congenital cataract before lens extraction. Results: Foldable group (18 eyes ): Mean follow-up was 12.1 months. Visual acuity (VA): compared with the best corrected VA before IOL fixation, postoperative best corrected VA improved in 16 eyes, remained unchanged in 2 eyes. In 14 eyes, one or two stitches were needed to seal the incision. Complications: Severe anterior chamber reaction was seen in 3 eyes. Intraocular bleeding was found in 3 eyes. IOL decentration was detected in 1 eye. Iris capture of IOL was seen in one eye. PMMA group (25 eyes ):Mean follow-up was 20.3 months. Visual acuity (VA): compared with the best corrected VA before IOL fixation, postoperative best corrected VA improved in 19 eyes,remained unchanged in 5 eyes and got worse in one eye. In 24 eyes, one to three stitches were needed to seal the incision. Complications: Severe anterior chamber reaction was seen in 5 eyes. Intraocular bleeding was found in 4 eyes. IOL decentration was seen in one eye. Iris capture of IOL was seen in 3 eyes. Intraocular pressure elevated in one eye. Conclusion: Our study shows that trans-scleral fixation of IOL is a safe procedure in pediatric eyes. Foldable IOL showed similar effect compared with PMMA IOL in pediatric trans-scleral fixation. Eye Science 2001; 17:61 ~ 64.

  19. Contrast sensitivity after refractive lens exchange with a multifocal diffractive aspheric intraocular lens

    Directory of Open Access Journals (Sweden)

    Teresa Ferrer-Blasco

    2013-04-01

    Full Text Available PURPOSE: To evaluate distance and near contrast sensitivity (CS under photopic and mesopic conditions before and after refractive lens exchange (RLE and implantation of the aspheric AcrySof®ReSTOR® (SN6AD3 model intraocular lens (IOL. METHODS:Seventy-four eyes of 37 patients after RLE underwent bilateral implantation with the aspheric AcrySof ReSTOR IOL. The patient sample was divided into myopic and hyperopic groups. Monocular uncorrected visual acuity at distance and near (UCVA and UCNVA, respectively and monocular best corrected visual acuity at distance and near (BCVA and BCNVA, respectively were measured before and 6 months postoperatively. Monocular CS function was measured at three different luminance levels (85, 5 and 2.5 cd/m² before and after RLE. Post-implantation results at 6 months were compared with those found before surgery. RESULTS: Our results revealed that patients in both groups obtained good UCVA and BCVA after RLE at distance and near vision in relation to pre-surgery values. No statistically significant differences were found between the values of CS pre and post-RLE at distance and near, at any lighting condition and spatial frequency (p>0.002. CONCLUSIONS: Refractive lens exchange with aspheric AcrySof ReSTOR IOL in myopic and hyperopic population provided good visual function and yield good distance and near CS under photopic and mesopic conditions.

  20. Aspherical Lens Design Using Genetic Algorithm for Reducing Aberrations in Multifocal Artificial Intraocular Lens

    Directory of Open Access Journals (Sweden)

    Chih-Ta Yen

    2015-09-01

    Full Text Available A complex intraocular lens (IOL design involving numerous uncertain variables is proposed. We integrated a genetic algorithm (GA with the commercial optical design software of (CODE V to design a multifocal IOL for the human eye. We mainly used an aspherical lens in the initial state to the crystalline type; therefore, we used the internal human eye model in the software. The proposed optimized algorithm employs a GA method for optimally simulating the focusing function of the human eye; in this method, the thickness and curvature of the anterior lens and the posterior part of the IOL were varied. A comparison of the proposed GA-designed IOLs and those designed using a CODE V built-in optimal algorithm for 550 degrees myopia and 175 degrees astigmatism conditions of the human eye for pupil size 6 mm showed that the proposed IOL design improved the spot size of root mean square (RMS, tangential coma (TCO and modulation transfer function (MTF at a spatial frequency of 30 with a pupil size of 6 mm by approximately 17%, 43% and 35%, respectively. However, the worst performance of spherical aberration (SA was lower than 46%, because the optical design involves a tradeoff between all aberrations. Compared with the traditional CODE V built-in optimal scheme, the proposed IOL design can efficiently improve the critical parameters, namely TCO, RMS, and MTF.

  1. [The effect of crystalline lens extraction on intraocular pressure in patients with primary open-angle glaucoma].

    Science.gov (United States)

    Macarie, S; Macarie, Daniela

    2013-01-01

    This issue presents the results of a study on patients with cataract and primary open angle glaucoma who suffered lens extraction for cataract. We analise the effects of the lens extraction on the level of intraocular pressure at this patients.

  2. Intraocular lens power calculation in eyes with short axial length

    Directory of Open Access Journals (Sweden)

    Marilita M Moschos

    2014-01-01

    Full Text Available Aim: To evaluate and compare the predictive capacity of four intraocular lens (IOL power calculation formulas (SRK/T, Hoffer Q, Holladay 1, and Haigis in eyes shorter than 22.0 mm. Setting and Design: Observational study. Materials and Methods: Participants in our study were 69 consecutive patients with a preoperative axial length (AL of less than 22.0 mm in one or both eyes. All patients underwent phacoemulsification with IOL implantation and postoperative target of refraction was analyzed. Specifically, the differences in the mean absolute estimation error (AE for the four formulas were analyzed. Furthermore, the percentage of eyes with AE within ±0.5 and ±1.0 D for each formula was estimated, as well as the correlation coefficient (r between the AL and estimation error (E for each formula. The Mann-Whitney U test was used to compare differences in the AEs of the formulas. A statistically significant difference was defined as P < 0.05. Results: The Haigis formula had statistically significant smaller mean AE in comparison to Holladay 1, Hoffer Q, and SRK/T. The Haigis formula predicted more eyes with E within ±0.5 and ±1.0 D of predicted spherical equivalent compared to other formulas. Correlation between AL and AE revealed a negative r value and P < 0.05 for all formulas. Conclusions: Haigis formula provides more accurate results concerning the postoperative target of refraction in eyes with AL less than 22.0 mm. Hoffer Q could be also used as an alternative.

  3. Early clinical outcome with a new monofocal microincision intraocular lens.

    Science.gov (United States)

    Toygar, Baha; Yabas Kiziloglu, Ozge; Toygar, Okan; Hacimustafaoglu, Ali Murat

    2016-10-01

    The purpose of this study was to evaluate the early visual and refractive outcomes of a new aspheric monofocal microincision intraocular lens (IOL). This retrospective case series included eyes of patients who underwent implantation of a microincision IOL following 1.8 mm manual coaxial microincision cataract surgery and who attended regular postoperative follow-up visits on the first week and first, third, and sixth months. The postoperative uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), refraction and predictability, intraoperative and postoperative complications, posterior capsule opacification (PCO), IOL centration, and surgically induced astigmatism (SIA) were evaluated. Sixty-three eyes of 38 patients ranging in age from 51 to 86 were included in the study. The mean preoperative BCVA was 0.52 ± 0.42 logMAR. At the postoperative sixth month, the mean postoperative UCVA and BCVA were 0.12 ± 0.11 and 0.01 ± 0.03 logMAR, respectively. The mean postoperative spherical equivalent refraction (SER) was -0.30 ± 0.49 D. The SER was within ± 1.00 D of the attempted correction in 95.2 % of the eyes. The mean SIA measured with vector analysis was 0.45 ± 0.28 D. Mild PCO was observed in 9 eyes (14.7 %) with none requiring Nd:Yag laser capsulotomy. On centration analysis, the IOL was found to be 0.26 mm on average to the supero-nasal position. The aspheric microincision IOL was safely implanted and provided satisfactory visual and refractive outcomes in the early postoperative period.

  4. Retreatments after multifocal intraocular lens implantation: an analysis

    Science.gov (United States)

    Gundersen, Kjell Gunnar; Makari, Sarah; Ostenstad, Steffen; Potvin, Rick

    2016-01-01

    Purpose To determine the incidence and etiology of required retreatment after multifocal intraocular lens (IOL) implantation and to evaluate the methods and clinical outcomes of retreatment. Patients and methods A retrospective chart review of 416 eyes of 209 patients from one site that underwent uncomplicated cataract surgery with multifocal IOL implantation. Biometry, the IOL, and refractive data were recorded after the original implantation, with the same data recorded after retreatment. Comments related to vision were obtained both before and after retreatment for retreated patients. Results The multifocal retreatment rate was 10.8% (45/416 eyes). The eyes that required retreatment had significantly higher residual refractive astigmatism compared with those who did not require retreatment (1.21±0.51 D vs 0.51±0.39 D, P<0.01). The retreatment rate for the two most commonly implanted primary IOLs, blended bifocal (10.5%, 16/152) and bilateral trifocal (6.9%, 14/202) IOLs, was not statistically significantly different (P=0.12). In those requiring retreatment, refractive-related complaints were most common. Retreatment with refractive corneal surgery, in 11% of the eyes, and piggyback IOLs, in 89% of the eyes, was similarly successful, improving patient complaints 78% of the time. Conclusion Complaints related to ametropia were the main reasons for retreatment. Residual astigmatism appears to be an important determinant of retreatment rate after multifocal IOL implantation. Retreatment can improve symptoms for a high percentage of patients; a piggyback IOL is a viable retreatment option. PMID:27041983

  5. Intraocular lens exchange for high myopia in pseudophakic children.

    Science.gov (United States)

    Kraus, C L; Trivedi, R H; Wilson, M E

    2016-09-01

    PurposeThe purpose of this study was to examine the preoperative factors and postoperative outcomes following intraocular lens (IOL) exchange for high myopia in pseudophakic children.MethodsThe medical records of all patients undergoing IOL exchange for high myopia were retrospectively reviewed.ResultsA total of 15 eyes were identified that had undergone an IOL exchange for myopic shift. Average age of cataract extraction (CE) was 5.4 months. In all, 10/15 had a unilateral cataract. IOL exchange usually occurred at an average of 6 years following cataract surgery. The average spherical equivalent (SE) of the refractive error at that time was -9.6 D. Following IOL exchange, SE was -1.3 D. A two-line reduction in best-corrected visual acuity was observed in 1/13 of our patients for whom pre- and post-exchange data were available. The average axial length (AL) of the eye undergoing the IOL exchange was 24.0 mm, average AL in the non-operative eye was 22.1 mm. On average, the operative eyes grew 4.4 mm and the non-operative eyes 3.02 mm. No adverse events were seen in the operative eyes.ConclusionYounger age at the time of CE creates a greater likelihood of AL elongation and predisposes a child to myopic shift. IOL exchange should be considered an option to reduce anisometropia and associated aniseikonia to improve visual outcomes. Successful visual rehabilitation and predictable post-exchange refractions were seen with our patients.

  6. Intracapsular dexamethasone implant in patients undergoing phacoemulsification and intraocular lens implantation

    Directory of Open Access Journals (Sweden)

    Lucas Monferrari Monteiro Vianna

    2013-08-01

    Full Text Available PURPOSE: To relate the outcomes of 7 eyes of 7 patients in which a dexamethasone 0.7 mg implant (Ozurdex® was placed inside the capsule bag after phacoemulsification and intraocular lens (IOL implantation and compare with the fellow eyes, that were operated by the same technique and received dexamethasone eyedrops in the post-operatory. METHODS: Report review of 7 eyes of 7 patients who received dexamethasone 0.7 mg implant after phacoemulsification and IOL, comparing them to the fellow eyes. All the patients underwent bilateral cataract surgery, with one month interval, by the same technique and by experienced surgeons, without complications. Post operatory medication consisted of moxifloxacin eye drops for all the 14 eyes and topic dexamethasone for the 7 eyes that did not received the implant. RESULTS: Nuclear cataract classification (according to LOCS III was 3.28 ± 0.69 in the implant eye group and 3.14 ± 0.83 in the fellow eye group. Postoperative best spectacle correct visual acuity (BSCVA was 0.85 ± 0.12 and 0.87 ± 0.13, respectively in the implant and fellow eye groups. The intraocular pressure remained stable and similar to the pre-operative measurements. Anterior chamber reaction and cornea edema were similar in both groups in the follow-up. Two of the four no sutured pellet migrated to the anterior chamber during the first post-operative week and had to be repositioned. Another no sutured pellet dislocated and remained partially inside the capsule bag. The 3 patients with IOL haptic-sutured pellet had no complications. CONCLUSIONS: In the present study, dexamethasone 0.7mg implant were effective in controlling the inflammation after phacoemulsification and IOL implantation, with no significant side effects.

  7. Membrane Formation on the Surface of implanted Posterior Chamber Intraocular Lenses

    Institute of Scientific and Technical Information of China (English)

    FangyaoYang; GuijunWu

    1995-01-01

    Purpose:To study the prevention and treatment of the membrane formation on the lens surface after extracapsular cataract extraction(ECCE)with posterior chamber intraocular lens(PCIOL)implantation.Methods:We reviewed the records of 312 cataractous patients that had undergone ECCEwith PCIOLimplantation between1989and1993,Postoperatively all pa-tients were examined under slit-lamp microscopy.The membrane formation on the surface of PCIOLin pupilar area was divided into four grades.Two mem-branes of surgical removal were observed under a transmission electrom mi-croscopy.One PCIOLof surgical removal was observed under a scanning electron microscopy.Results;Of312 patients,21 had the membrane formation on the surface of the PCIOL postoperatively.The incidence of the membrane formation was6.7%.Comparisone with cases of senile cataract showed the incidence to be significantly the highest among;1.patients who had traumatic cataract(P<0.05);2.pa-tients with complicated cataract(P<0.05).Interoperatively residual lens corten and rupture of posterior capsule,interval time betwwen the first and second eye operations less than 1month are the main factors of menbrane formation.The ultrastructure in membrane and cytology on the lens surface showed that the membrane on the surface of PCIOLs is usually composed of acellular protein film and cellular elements,including macrophages.fibroblast-like cells,epithelioid cells,giant cells,fibroblasts and collagen fibrils,etc.Conclusions:The cellular response on the surface of an implanted PCIOLis a chonic foreign-body inflammatory reaction and the membrane of the surfaceof implanted PCIOL is a reactive membrane of the foreign-body.Eye Science1995;11:131-135.

  8. Symbolic algebra approach to the calculation of intraocular lens power following cataract surgery

    Science.gov (United States)

    Hjelmstad, David P.; Sayegh, Samir I.

    2013-03-01

    We present a symbolic approach based on matrix methods that allows for the analysis and computation of intraocular lens power following cataract surgery. We extend the basic matrix approach corresponding to paraxial optics to include astigmatism and other aberrations. The symbolic approach allows for a refined analysis of the potential sources of errors ("refractive surprises"). We demonstrate the computation of lens powers including toric lenses that correct for both defocus (myopia, hyperopia) and astigmatism. A specific implementation in Mathematica allows an elegant and powerful method for the design and analysis of these intraocular lenses.

  9. Sensitivity of the corneal-plane refractive compensation to change in power and axial position of an intraocular lens

    Directory of Open Access Journals (Sweden)

    W. F. Harris

    2009-12-01

    Full Text Available If an intraocular lens is displaced or if its power is changed what are the consequences for the refractive compensation of the eye?  Gaussian optics is used to obtain explicit formulae for the sensitivityof the corneal-plane refractive compensation (also called the refraction, refractive state, etc to change in power and axial displacement of a thin intraocular lens implanted in a simple eye.  In particular, for a pseudophakic Gullstrand simplified eye with intraocular lens placed 5 mm behind the cornea the sensitivity to errors in the power of the intraocular lens is about  71 . 0 − 71 for an intraocular lens of power   for an intraocular lens of power 20 D, that is, the refractive compensation decreases by about 0.71 dioptres per dioptre increase in the power of the intraocular lens.  More generally the sensitivity is approximately  ( m   0037 . 0 63 . 0 F − − 0.63 ( 003 . 0 63 . 0 − − (0.0037mF where FI is the power of the intraocular lens.  Also for Gullstrand’s simplified eye the sensitivity of refractive compensation to axial displacement of the intraocular lens is approximately linear in FI about  (64D FI, in fact.  That is, for each dioptre of the power of the intraocular lens the refractive compensation increases by about 0.064 dioptres per millimetre of axial displacement towards the retina. 

  10. Cataract phacoemulsification with intraocular lens implantation after keratoprosthetics by Burn Vascular Leukoma (A case report

    Directory of Open Access Journals (Sweden)

    E.V. Kovshun,

    2014-01-01

    Full Text Available ABSTRACT Purpose. To evaluate the phacoemulsification (Phaco with intraocular lens (IOL implantation outcome after keratoprosthetics in patient with burn vascular leukoma. Material and methods. A patient, 39 years old, with a thinned burn vascular leukoma as a result of burns, limbal stem cell deficiency of both eyes, local simblefaron in the left eye (OS, secondary glaucoma (OS, after a simblefaron dissection and a glaucoma operation (OS, it was performed keratoprosthetics with a undismountable model of keratoprosthesis with an improvement in visual acuity (VA from 1/∞ рr. сerta up to 0.5 u/c. But there was a decrease in the VA to 0.01 u/c in 13 months. The aglia with vascularization and total overgrowth on the conjunctiva were observed on admission. Haptic keratoprostheses elements were not visible. Optical cylinder was clear. Anterior chamber depth was less than the average. A pronounced opacity of cortical layers of crystalline lens were defined. Fundus details were not visualized. A disturbance of topographic anatomical correlations in all structures of the anterior segment of the eye (ASE was revealed by the ultrasound bio-microscopy: corneal thickness — 1.47mm, anterior chamber depth in the central parts — 1.09mm, а lot of irido-corneal adhesions in the anterior chamber angle (ACA with anterior chamber closing by basal area of the iris, medium hypertrophy of the iris (0.43mm. The maximum size of the ciliary body was 0.74mm. Ciliary zonule fibers were heterogeneous: in three segments they were thickened, hypertrophied and with adhesions between them, in one segment lysed or fused with the iris. Posterior chamber dimensions were acutely asymmetrical. Anterior posterior size of lens w as 5.23mm. Despite the significant impairments of spatial relations in ASE structures in the patient the microinvasive Phaco with soft IOL implantation were carried out with the preventive purpose of possible complications during the highly traumatic

  11. Comparison of a hydrophilic and a hydrophobic apodized diffractive multifocal intraocular lens.

    NARCIS (Netherlands)

    Linden, J.W.M. van der; Meulen, I.J. van der; Mourits, M.P.; Lapid-Gortzak, R.

    2013-01-01

    To compare outcomes between a new design apodized diffractive hydrophilic multifocal intraocular lens (IOL) (Seelens MF; study group), and a well-known apodized diffractive hydrophobic multifocal IOL (SN6AD1; control group). A comparative case series comparing refractive and visual outcomes at dista

  12. 有晶状体眼后房型人工晶状体植入和准分子激光原位角膜磨削术矫正超高度近视的临床评价%Evaluations of Extreme Myopia Correction with Phakic Posterior Chamber Intraocular Lens and Laser in Situ Keratomileusis

    Institute of Scientific and Technical Information of China (English)

    沈晔; 李毓敏; 王竞

    2004-01-01

    目的:比较和评价有晶状体眼后房型人工晶状体(Phakic Posterior Chamber Intraocular Lens,PPCIOL)植入和准分子激光原位角膜磨削术(Laserin situ Keratomileusis,Lasik)矫正高度近视的有效性、安全性和稳定性.方法:高度近视患者43例,随机分为PPCIOL组和Lasik组,分别行可植入接触镜(Implantable Contact Lens,ICL)植入术和Laisk,随访并比较两组有效性和安全性指数,两年屈光度回退≤2 D的生存率,低对比度视力和眩光视力的改变.结果:PPCIOL组术前平均等效球面屈光度(-16.77±3.37)D(-11.75~-25.75 D);Lasik组术前平均等效球镜度(-13.8±2.71)D(-9.37~-23.75 D).术后1个月两组有效性无统计学差异,PPCIOL组安全性指数高于Lasik组(P<0.001),2 a时屈光度回退率分别为0、32.56%(P<0.001),术后3个月低对比视力和眩光视力PPCIOL组较术前提高比Lasik组明显(P<0.001).PPCIOL组有1例2眼术后6个月时有晶状体前囊混浊,两组未见其他并发症.结论:有晶状体眼后房型人工晶状体植入矫正超高度近视有效,安全性和稳定性较Lasik更好,并能获得良好的视觉质量.

  13. Quantitative observation on changes of anterior segment by ultrasound biomicroscopy after posterior chamber phakic intraocular lens implantation%UBM量化观察有晶状体眼后房型人工晶状体植入术前后眼前节形态的变化

    Institute of Scientific and Technical Information of China (English)

    王瑞娜; 郑广瑛; 王松田; 王洁; 赵建国; 郭红亮; 赵丽君

    2011-01-01

    ObjectiveThe objective is to study the safety and effectiveness of implantation of posterior chamber phakic intraocular contact lens (ICL) by observing the changes in anterior segment using ultrasound biomicroscopy (UBM). Methods It was a perspective study. The study sampled 30 high myopia patients (30 eyes) who were treated with posterior chamber phakic ICL implant. Central anterior chamber depth (ACD), trabecular-iris angle (TIA), angle opening distance (AOD500), trabecular-ciliary processes distance (TCPD) and iris-ciliary processes distance (ICPD) were measured using UBM preoperatively,3 months and 1 year postoperatively. The distance from ICL to the central surface of lens and peripheral lens and intra-ocular pressure were measured postoperatively and examined using slit-lamp biomicroscope. Oneway ANOVA was used to analyze the distance between peripheral surface of ICL and the lens. One-way repeated measures ANOVA and Bonferroni were conducted. Results Preoperatively, 3 months and 1 year postoperatively, ACD were(3. 16 ± 0. 08 ) mm, ( 2. 76 ± 0. 13 ) mm, (2. 74 ± 0. 14) mm; AOD500 were (0.45 + 0.04) mm, (0.41 ± 0.04) mm, (0.41 ±0.03) mm; TIA were (35.00 ±3. 24)°, (32.47 ±3.56) °, (32. 40 ± 3. 23 ) °, respectively. There were significant difference in TIA, ACD and AOD ( P <0. 05) between preoperative and postoperative data. There was no significant difference between the two postoperative periods tested. TCPD and ICPD showed no significant difference between various time points ( F =0. 49, F =0. 57 ; P > 0. 05 ). Conclusions The decrease in ACD depth and correction in TIA and AOD were the noticeable changes observed in morphological structure of the ocular anterior segment after the ICL treatment. The incidence of complication did not increase as the result of the minor changes in morph structure during the course of the study. However, the long-term effects would require further long-term observation.%目的 应用超声生物显微镜(UBM)对

  14. Sutureless intrascleral intraocular lens fixation with lamellar dissection of scleral tunnel

    Science.gov (United States)

    Kawaji, Takahiro; Sato, Tomoki; Tanihara, Hidenobu

    2016-01-01

    Purpose To report the results of sutureless scleral fixation of a posterior chamber intraocular lens (IOL) by using our developed simple technique. Methods We retrospectively reviewed the medical records of 48 eyes of 47 patients who underwent sutureless intrascleral IOL fixation by using our modified technique. A 25-gauge microvitreoretinal knife was used to perform sclerotomies and create limbus-parallel scleral tunnels with lamellar dissection in which the haptics were fixed. Results The IOLs were fixed and centered well. The mean follow-up period was 26.7 months. Postoperative complications included smooth vitreous hemorrhage in four eyes (8.3%), cystoid macular edema in two eyes (4.2%), and iris capture of the IOL in two eyes (4.2%). No other complications, such as breakage of the IOL, spontaneous IOL dislocation, or retinal detachment, were detected during the follow-up period. Conclusion The lamellar dissection of the limbus-parallel scleral tunnel can simplify the forceps-assisted introduction of the haptics into the scleral tunnel, and this technique seemed to be safe. PMID:26869757

  15. Tram-Track Suture Technique for Pupillary Capture of a Scleral Fixated Intraocular Lens

    Science.gov (United States)

    Kim, Sung In; Kim, Kiseok

    2016-01-01

    Purpose To report a new technique using tram-track suture for pupillary capture of a scleral fixated posterior chamber intraocular lens (PC-IOL) to reposition the tilted IOL. Methods In this prospective interventional case series, we describe a tram-track suture for pupillary capture of a scleral fixated PC-IOL. A long straight needle with double-armed 10-0 polypropylene is passed behind the iris and just above the optic portion (tilted forward) of the IOL. The other straight needle with double-armed 10-0 polypropylene is passed just below the optic portion (tilted backward) of the IOL. After the IOL is repositioned properly, the polypropylene sutures are gently pulled and tied. Results Four eyes of 4 patients underwent tram-track suture for pupillary capture of a scleral fixated PC-IOL. No intra- or postoperative complications were noted, and no pupillary captures were detected during the follow-up period. Conclusions The tram-track suture technique provides good centration and stability of a PC-IOL. This technique is an easy and effective way to reposition pupillary capture of an IOL. Further, it is also minimally invasive as it maintains a closed system. PMID:27462257

  16. 有晶状体眼后房型人工晶状体植入矫正高度近视及散光疗效观察%Preliminary observation of the effect of Posterior chamber phakic intraocular lens for high myopia with or without astigmatism

    Institute of Scientific and Technical Information of China (English)

    唐晓蕾; 王晓莉; 赵媛; 曾涛; 夏敏; 邱丹

    2015-01-01

    目的 探讨有晶状体眼后房型人工晶状体植入矫正高度近视及散光的临床应用价值.方法 纳入2010年3月至2013年1月间14例(25只眼)高度近视及散光患者,其中男6例,女8例,年龄18~42岁,平均26.7岁.所有患者接受有晶状体眼后房型人工晶状体植人治疗,术后随访3个月,检查裸眼视力、最佳矫正视力、屈光度、散光度,并在裂隙灯下检查拱高和轴向移位等.结果 所有患者术后裸眼视力较术前提高,术后3个月均达到或超过术前最佳矫正视力.术前等效球镜为-7.00~-22.0D,平均-(12.52±2.50)D,术后等效球镜为-0.25~-0.75 D,平均-(0.54±0.11)D,术后屈光度较术前明显降低,差异有统计学意义(P<0.05).散光由术前-(1.83±1.12)D下降至术后-(0.55±0.21)D,差异有统计学意义(P<0.05).手术前后眼压、角膜内皮细胞密度差异无统计学意义(P>0.05).术后无拱高偏大者,1只眼拱高偏低.术后93.75% (15/16)的TICL患者轴向偏转<10°.结论 有晶状体眼后房型人工晶状体植入术矫正高度近视及散光可以获得良好的裸眼视力,为高度近视患者提供一种新的选择,但其长期稳定性及远期并发症需要进一步观察.%Objective To investigate the efficacy and safety of the implantation of posterior chamber phakic intraocular lens (ICL) for high myopia with or without astigmatism.Methods From March 2010 to January 2013,14 high myopia patients (25 eyes) with or without astigmatism including 6 males and 8 females were admitted to our department.The average age of these patients was 26.7 years old,ranging from 18 to 42.All of them were treated by implantation of posterior chamber phakic ICL.Vision and diopter,as well as the results of slit lamp examination were used to evaluate the efficacy during the follow up.Results All patients were implanted ICL successfully and adhered to follow-up.The uncorrected visual acuity of every eye after surgery had improved,same or

  17. 人工晶体睫状沟缝合固定术临床观察%Clinical observation of intraocular lens ciliary sulcus suture fixation

    Institute of Scientific and Technical Information of China (English)

    沙英虹; 史要武

    2015-01-01

    Objective To investigate clinical application of intraocular lens ciliary sulcus suture fixation.Methods Posterior chamber intraocular lens ciliary sulcus suture fixation was applied for 15 patients with traumatic lens subluxation, posterior capsule injury, posterior capsule injury after senile cataract ultrasonic emulsification, and non-lens after vitrectomy. Their clinical effects were observed.Results Follow-up for 6 months showed postoperative visual acuity in 15 cases were all better than best corrected visual acuity before operation.Conclusion Implement of intraocular lens ciliary sulcus suture fixation is a safe and effective method for non-lens capsule, lens posterior capsular rupture, or wide acantholysis of lens suspensory ligament.%目的 探讨人工晶状体睫状沟缝合固定术的临床应用.方法 对15例外伤性晶体半脱位,后囊破损,老年性白内障超声乳化后囊破损,玻璃体切割术后无晶体眼患者施行后房型人工晶体(IOL)缝线固定术,观察临床效果.结果 随诊6个月,15例患者术后视力均高于术前最佳矫正视力.结论 对无晶体囊膜及晶体后囊膜破裂或晶体悬韧带大范围松解施行人工晶状体睫状沟固定术是一种安全有效的方法.

  18. 有晶状体眼后房型人工晶状体植入术矫正高度近视%Posterior Chamber Phakic Intraocular Lens Implantaion for Correction of High Myopia

    Institute of Scientific and Technical Information of China (English)

    孙荣; 周霞; 吕海燕; 邓莹莹

    2014-01-01

    目的:观察有晶状体眼后房型人工晶状体(implantable contact lens,ICL)植入术矫正高度近视的有效性、安全性及稳定性.方法:自201 1年1月至2013年3月在本院行有晶状体眼后房型人工晶状体植入术的高度近视患者36例(71眼).随访术前及术后1d、1周及1、3、6个月.随访内容包括裸眼视力、最佳矫正视力、屈光度数、裂隙灯显微镜检查、眼压、Obscan-Ⅱ角膜地形图、超声生物显微镜(UBM)、角膜内皮细胞计数等,观察屈光状态及术后并发症.结果:36例(71眼)术前裸眼视力和最佳矫正视力分别为0.08 ±0.02、0.62±0.29;术后裸眼视力和最佳矫正视力分别为0.69±0.30、0.72±0.28;术后裸眼视力较术前裸眼视力明显提高(P<0.01),达到术前最佳矫正视力.术前等效球镜屈光度为(-13.56 ±4.25)D,术后最后一次随访等效球镜屈光度为(-0.85 ±0.36)D,与预期屈光度数差别±1.00D以内者65只眼(91.5%).术后各随访时间点平均眼压及角膜内皮细胞计数与术前相比较差异无统计学意义(P>0.05).通过UBM观察术前前房深度(3280±206)μm,术后最后一次随访前房深度减少到(2863±217) μm,两者相比较差异有统计学意义(P<0.05).通过UBM观察术后各随访时间点ICL拱高均在理想范围内,ICL在眼内位置稳定.4例(6眼)术后1周内发生高眼压,经治疗后眼压恢复正常.1例(2眼)术后发生局限性晶状体前囊下混浊,随访期间病变无进展,术后视力无下降,无需手术治疗.结论:有晶状体眼后房型人工晶状体植入术矫正高度近视具有有效性、安全性及稳定性.术前精确的数据测量是决定术后效果及有效避免术后并发症的关键所在.

  19. Development of a universal toric intraocular lens calculator

    Science.gov (United States)

    Hjelmstad, David; Sayegh, Samir I.

    2014-02-01

    We present a method for calculating the ideal toric lens to implant in astigmatic patients following cataract surgery. We show that the online calculators provided by major toric IOL manufacturers are insufficient for both theoretical and practical reasons. We reveal important theoretical shortcomings in their approach, illustrated by a number of cases which demonstrate how the approach can lead to errors in lens selection. Our approach combines the spherical and cylindrical power calculations into one, and allows for lens data from any manufacturer to be used, eliminating the reliance on multiple programs.

  20. Optimizing distance image quality of an aspheric multifocal intraocular lens using a comprehensive statistical design approach.

    Science.gov (United States)

    Hong, Xin; Zhang, Xiaoxiao

    2008-12-01

    The AcrySof ReSTOR intraocular lens (IOL) is a multifocal lens with state-of-the-art apodized diffractive technology, and is indicated for visual correction of aphakia secondary to removal of cataractous lenses in adult patients with/without presbyopia, who desire near, intermediate, and distance vision with increased spectacle independence. The multifocal design results in some optical contrast reduction, which may be improved by reducing spherical aberration. A novel patent-pending approach was undertaken to investigate the optical performance of aspheric lens designs. Simulated eyes using human normal distributions were corrected with different lens designs in a Monte Carlo simulation that allowed for variability in multiple surgical parameters (e.g. positioning error, biometric variation). Monte Carlo optimized results indicated that a lens spherical aberration of -0.10 microm provided optimal distance image quality.

  1. Scleral suspension pars-plana lensectomy for ectopia lentis followed by suture fixation of intraocular lens

    Directory of Open Access Journals (Sweden)

    Mitra Sandip

    2001-01-01

    Full Text Available Purpose: To describe a simple technique of scleral suspension-pars plana lensectomy (SS-PPL in acquired and congenital ectopia lentis and scleral fixation of intraocular lens (IOL. Materials and Methods: Twenty eyes of 16 patients (12 unilateral and 4 bilateral cases of "essential familial lens subluxation" aged 10-40 years (mean 25 years underwent SS-PPL with implantation of scleral fixated IOL. Indications for surgery were best-corrected visual acuity <6/18, bisection of pupil by the lens, and lens-induced glaucoma. Prerequisites for SS-PPL were, visibility of part of the lens in the pupillary area and soft lens. Results: Postoperative visual acuity ranged from 6/6 - 6/36. Lens tilt in 3 cases(15% and small decentration in 2 cases(10% were seen; however these did not seriously compromise the visual result. Scant vitreous bleeding on the first postoperative day was seen in 3 cases (15%. Conclusion: The advantages of the scleral suspension of subluxated lens prior to lensectomy include stabilization; it allows proper viewing of the lens, avoids injury to the iris and cliary body during lensectomy and reduces the possibility of dislocation of the lens.

  2. Intraocular Lens Opacification following Intracameral Injection of Recombinant Tissue Plasminogen Activator to Treat Inflammatory Membranes after Cataract Surgery

    Directory of Open Access Journals (Sweden)

    Simon S. M. Fung

    2015-01-01

    Full Text Available Purpose. To report 7 cases of intraocular lens (IOL opacification following treatment of postoperative anterior chamber fibrin with recombinant tissue plasminogen activator (rtPA after cataract surgery. Methods. Retrospective case series of 7 eyes in 7 patients who developed IOL opacification after receiving rtPA for anterior chamber inflammatory membrane formation resulting from phacoemulsification cataract surgery. Three explanted IOLs were investigated with light microscopy, histochemical analysis, scanning electron microscopy, and X-ray spectrometry. Results. All patients underwent uncomplicated cataract surgery and posterior chamber hydrophilic IOL implantation. Anterior chamber inflammatory membranes developed between 1 and 4 weeks of surgery and were treated with intracameral rtPA. IOL opacification was noted between 4 weeks and 6 years after rtPA treatment with reduced visual acuity, and IOL exchange was carried out in 3 patients. Light microscopy evaluation revealed diffuse fine granular deposits on the anterior surface/subsurface of IOL optic that stained positive for calcium salts. Scanning electron microscopy (SEM and energy-dispersive X-ray spectrometry (EDS confirmed the presence of calcium and phosphate on the IOL. Conclusions. Intracameral rtPA, though rapidly effective in the treatment of anterior chamber inflammatory membranes following cataract surgery, may be associated with IOL opacification.

  3. 后房型有晶状体眼人工晶状体矫治高度近视眼的3年随访报告%Three-year follow-up of posterior chamber phakic intraocular lens implantation for high myopia

    Institute of Scientific and Technical Information of China (English)

    俞阿勇; 王勤美; 朱双倩; 郑林燕; 薛安全; 苏炎峰

    2010-01-01

    Objective To investigate long-term efficacy and safety ofa posterior chamber phakic intraocular lens (PCPIOL) implantation for high myopia. Methods A consecutive group of 66 eyes in 41 patients with -15.12± 3.93 diopters (D) of myopia was implanted with the ICL PCPIOL (STAAR), and was examined preoperatively and 1, 2, 3 years postoperatively. Uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), manifest refraction, intraocular pressure, and complications were evaluated. Results The implantation was successful in all of 66 eyes. Compared with preoperative data, UCVA, BCVA, and spherical equivalent (SE) were improved significantly. At 3-year postoperatively, UCVA in 86% eyes was 0.5 or better, in 43% was 0.8 or better; No loss of BCVA was found, 11% gained 1 line, and 68% gained 2 lines or more; SE in 96%, 57% eyes was within ± 1.00 D, ± 0.50D of attempted, respectively. At 1-, 2-, 3-year follow-up, the corneal endothelial loss was 9.26%, 12.84%, 18.54%, respectively. No severe complications occurred expect 1macular hemorrhage due to CNV. Conclusions At 3-year follow-up, the implantation of the PCPIOL proved to be safe and effective for the correction of myopia in phakic eyes.%目的 观察后房型有晶状体眼人工晶状体(PCPIOL)矫治高度近视眼的长期安全性和有效性.方法 高度近视眼患者41例(66只眼),等效球镜度数(SE)(-15.12±3.93)D,植入PCPIOL.术后随访3年,观察手术前后的视力、屈光状态、眼压、角膜、前房、瞳孔、PCPIOL和晶状体、眼底情况,并进行比较.结果 与术前比较,术后3、6个月、1、2、3年的裸眼视力(UCVA)、最佳矫正视力(BCVA)和SE显著改善.术后3年时,UCVA≥0.5有86%,≥0.8有43%;BCVA未见下降,11%比术前提高1行,68%比术前提高≥2行;96%眼的实际屈光度数稳定在预期的±1.00D,57%稳定在预期的±0.50D.术后1、2、3年的角膜内皮细胞累积丢失率分别为9.26%、12.84%、18.54%.除了1只眼黄斑出血

  4. The Changes of Quality of Life in the Patients after Phacoemulsification with Intraocular Lens Implantation

    Institute of Scientific and Technical Information of China (English)

    Jiewei Liu; Jingjing Xu; Mingguang He

    2004-01-01

    Purpose: To investigate the improvement and maintenance of the quality of life in the patients after phacoemulsification with intraocular lens implantation.Methods :The study population consisted of 116 patients receiving phacoemulsification with intraocular lens implantation. They were interviewed using the quality of life questionnaire, and the clinical outcomes were evaluated before surgery and at 1 week, 1month, 3 months, 6 months after surgery respectively.Results:Patients reported similar scores of quality of life and all the four subscales among 1-week, 1-month , 3-month and 6-month follow-up visit after surgery, all of which were higher than the scores before surgery.Conclusion: Patients receiving phacoemulsification reported rapid improvement in quality of life after surgery, and the quality of life scores were not changed significantly from 1week to 6 months after surgery.

  5. 23-gauge Transconjunctival Sutureless Vitrectomy in Eyes with Posteriorly Dislocated Intraocular Lens after Cataract Surgery

    Directory of Open Access Journals (Sweden)

    Fatih Horozo¤lu

    2011-08-01

    Full Text Available Purpose: To evaluate the outcomes of 23-gauge (23-G transconjunctival sutureless vitrectomy (TSV in eyes with posteriorly dislocated intraocular lens (IOL after cataract surgery. Material and Method: In this retrospective study, we evaluated 6 eyes of 6 consecutive cases with posteriorly dislocated intraocular lens after cataract surgery between April 2007 and November 2010. Visual acuity, intraocular pressure, detailed fundus examination and details of surgery were recorded. Results: The mean age of the patients was 64.7 years and the mean follow-up was 5.5 months (3-12 months. All eyes received 23-G TSV. Dislocated IOL was removed from the vitreous and implanted into ciliary sulcus in 2 eyes (33.3% with polymethylmetacrilate IOL and in 4 eyes (66.7% with 3-piece hydrophilic acrylic IOL. In 5 of the 6 eyes (83.7%, visual acuity improved postoperatively. In one eye (16.7%, elevation of intraocular pressure was observed postoperatively and controlled by topical treatment. Discussion: 23-G TSV surgery may be used in eyes with posteriorly IOLs after cataract surgery. Studies with a larger number of patients would better demonstrate the efficacy of this method. (Turk J Ophthalmol 2011; 41: 213-6

  6. Opacificação tardia de lente intra-ocular de polimetilmetacrilato (PMMA: relato de caso Late opacification of a polymethylmethacrylate (PMMA intraocular lens: case report

    Directory of Open Access Journals (Sweden)

    Otacílio de Oliveira Maia Júnior

    2005-10-01

    Full Text Available O implante das lentes intra-oculares foi grande avanço na reabilitação visual de pacientes submetidos à cirurgia de extração da catarata. Contudo, os materiais utilizados na fabricação destas lentes, apesar de terem boa biocompatibilidade, são passíveis de alterações posteriores ao implante. No presente estudo, os autores relatam um caso raro de opacificação tardia de lente de polimetilmetacrilato, material inerte e bem tolerado intra-ocularmente, discutindo aspectos importantes no manejo desta complicação, bem como indicação de explante e substituição da lente.The use of intraocular lenses was a great advance in visual recovery after cataract surgery. Although usually with good biocompatibility, some alterations in the intraocular lens material may occur after implantation. Polymethylmethacrylate was the first intraocular lens material to be used on a large scale and assumed to be inert and well-tolerated. We present a rare case of late opacification of a polymethylmethacrylate lens, discussing important aspects of its management such as the indication for intraocular lens exchange.

  7. Hydrogels for an accommodating intraocular lens. An explorative study

    NARCIS (Netherlands)

    de Groot, JH; Spaans, CJ; van Calck, RV; van Beijma, FJ; Norrby, S; Pennings, AJ

    2003-01-01

    In this study it was investigated whether hydrogels could be used for an accommodating lens. The requirements of such a hydrogels are a low modulus, high refractive index, transparency, and strength. Since conventional hydrogels do not possess this combination of properties, a novel preparation meth

  8. Evaluation of intraocular lens implant location in the eyeball basing on the Purkinje images

    Science.gov (United States)

    Jóźwik, A.; Siedlecki, D.; Zajac, M.

    2012-01-01

    Intraocular lens (IOL) is an artificial implant substituting natural crystalline lens which is non-transparent due to cataract. Incorrect location of the IOL in the eyeball (e.g. its shift or tilt) causes significant deterioration of patient's vision. The analysis of Purkinje images (i.e. reflections from successive refracting surfaces in the eye) enables to determine the real IOL location and thus helps in evaluating the retinal image quality. The experimental setup for Purkinje images recording consists of illuminator, composed of a number of infrared LEDs, telecentric lens and detector (CCD camera). Analysis of mutual position of particular reflections enables to evaluate the lens location in respect to the corneal axis. The actual measurements are realized on artificial eye model, what allows to estimate the precision of the algorithm applied in the calculations. In the future the experimental set-up will be adapted to measure the eyes of real patients.

  9. Intraocular lens power calculation by measuring axial length with partial optical coherence and ultrasonic biometry

    OpenAIRE

    Beatriz Machado Fontes; Bruno Machado Fontes; Elaine Castro

    2011-01-01

    PURPOSE: To compare the achieved refractive outcomes of patients undergoing cataract surgery with intraocular lens (IOL) power calculation performed by conventional immersion ultrasound (US) or partial coherence interferometry (PCI). METHODS: Prospective, comparative case series. Patients undergoing cataract surgery were randomly divided in two groups with regard to the IOL power calculation method. Group 1 had calculations performed by PCI (IOL Master; Carl Zeiss Meditec), while US was used ...

  10. Biocompatibility of intraocular lens materials%人工晶体材料的生物相容性特征★

    Institute of Scientific and Technical Information of China (English)

    王洋; 韩宏光

    2013-01-01

      BACKGROUND: The visual recovery and complications of the cataract patients are various after different intraocular lens materials implantation, so the selection of appropriate intraocular lens materials is the key of the research. OBJECTIVE: To investigate the properties and biocompatibility of intraocular lens materials. METHODS: The materials were classified according to the hardness and location of the intraocular lens after implantation in order to analyze the pros and cons of the intraocular lens thus guiding the patients to select the appropriate intraocular lens for implantation. The properties and biocompatibility of the commonly used intraocular lens materials were evaluated. RESUTLS AND CONCLUSION: Polymethylmethacrylate intraocular lens is the first choice of rigid material, but it cannot tolerate autoclaving. Acrylic intraocular lens is the soft and foldable intraocular lens that has the similar optical and biological properties with polymethylmethacrylate intraocular lens, and it can improve the visual acuity after implantation with less complications. Posterior capsular opacification is the most important indicator for biocompatibility evaluation which is related with the material and design of intraocular lens. The stability of intraocular lens in the capsular bag is also the indicator to evaluate the biocompatibility. The material properties, biocompatibility, and visual function should be taking into consideration in the design and selection of intraocular lens materials. Guarantee the efficacy after intraocular lens implantation and reduce the incidence of complications, so that to get vision rehabilitation for the cataract patients.%  背景:白内障患者植入不同材料人工晶体治疗后的视力恢复情况和并发症有所不同,选择适宜的人工晶体材料是研究的关键。目的:探讨人工晶体材料的特征和生物相容性。方法:按人工晶体的硬度和植入后不同位置将材料进行分类

  11. Intra-ocular lens implantation after vitreous loss.

    Directory of Open Access Journals (Sweden)

    Shah N

    1991-10-01

    Full Text Available Vitreous loss is a dreaded complication of cataract surgery, especially so with IOL implant which then may have to be abandoned. Thirty three cases of IOL implants, either anterior chamber or posterior chamber, after vitreous loss done in the past 3 years were studied. Of these, 18 (55% had a final visual acuity of 6/18 or better and none was worse than 6/60. The postoperative complications and findings and a review of literature are discussed.

  12. Ophthalmic viscosurgical device backflow into cartridge during intraocular lens insertion using injectors

    Directory of Open Access Journals (Sweden)

    Matsuura K

    2014-01-01

    Full Text Available Kazuki Matsuura,1 Yoshitsugu Inoue2 1Nojima Hospital, 2Tottori University, Kurayoshi City, Tottori, Japan Background: The purpose of this study was to assess the risk of intraocular contamination caused by intraocular lens (IOL insertion with injectors by observing the dynamics of an ophthalmic viscosurgical device (OVD. Methods: Each type of injector was equipped with a colored OVD and IOL, and a 2 mm length from the tip of the cartridge was replaced with a colored OVD. The various combinations of IOLs and injectors used were: a three-piece shaped IOL, VA60BBR + TypeE1 (HOYA incision size 2.5 mm; group A, n=5; a single-piece IOL, 251+ iSert micro, preloaded (HOYA, incision size 2.2 mm; group G, n=5; and a single-piece IOL, SN6CWS preloaded (Alcon, incision size 2.7 mm; group C, n=5. Results: In group A, the intraocular OVD instantly flowed backward into the injector, whereas the colored OVD was pushed backward deep inside the cartridge without flowing into the eye. In group B, the backflow of the intraocular OVD into the injector was limited, resulting in the influx of a large amount of the colored OVD into the eye along with the IOL. In group C, as in group A, a large amount of the intraocular OVD flowed backward into the injector. Consequently, a small amount of the colored OVD flowed into the eye. Conclusion: The tip of the injector and OVD could be contaminated because the surgical field cannot be completely sterile, even after preoperative disinfection. Our experiments revealed that OVD backflow into the injector cavity occurs during IOL insertion, and this phenomenon may have minimized intraocular contamination. However, small-diameter cartridges along with plate-type haptics allow insufficient OVD backflow, resulting in intraocular influx of the contaminated OVD. Surgeons have to be notified that intraoperative bacterial contamination can occur even after IOL insertion using injectors. Keywords: intraocular lens insertion

  13. Classification of intraocular lens and its intraocular biocompatibility%人工晶体分类及其在眼内的生物相容性

    Institute of Scientific and Technical Information of China (English)

    胡莉群

    2009-01-01

    目的:通过手术摘除自身浑浊晶体,植入人工晶体是治疗白内障的惟一有效措施.文章总结人工晶体材料的研究进展,为今后的临床应用和研究提供参考.方法:应用计算机检索1997/2009 Medline数据库、中国期刊网和万方数据库、SpringerLink数据库和ScienceDirect数据库.结果:共有25篇文章符合纳入标准.文章主要从人工晶体的发展现状、分类、生物相容性、人工晶体的并发症和发展趋势进行阐述.人工晶体按照硬度,可以分为硬质人工晶体和软性人工晶体.丙烯酸人工晶体比硅凝胶人工晶体的生物相容性更好.人工晶状体脱位是白内障摘除联合人工晶状体植入术后较常见的并发症之一.注入式人工晶体材料是今后研究的方向.结论:人工晶体植入眼内作为一种异物,机体对此产生反应是机体正常的防御现象.人工晶体材料和设计应充分的考虑人工晶体的生物相容性、术后视功能、调节功能、光保护等方面性能.保证术后的疗效和减少并发症的发生,使白内障患者获得更高质量的视力康复.%OBJECTIVE: The sole effective measure for cataract is replaced the epinephelos lens with intraocular lens. So, in this paper, we summarize the research process of intraocular lens, which can provide a reference for further study. METHODS: Medline, China Journal Net, Wanfang Data, SpringerLink, and ScienceDirect database were computer retrieved from 1997 to 2009. RESULTS: A total of 25 papers were included. All the papers were explained intraocular lens from the aspect of current situation, complication following implantation, and develop tendency. According to hardness, intraocular lens can be divided into hard intraocular lens and soft intraocular lens. Acrylic intraocular lenses showed better biocompatibility than the silicone intraocular lenses. In addition, the common complication following implantation was dislocation of lens. Therefore

  14. Visual performance after the implantation of a new trifocal intraocular lens

    Directory of Open Access Journals (Sweden)

    Vryghem JC

    2013-10-01

    Full Text Available Jérôme C Vryghem,1,2 Steven Heireman1,21Brussels Eye Doctors, Brussels, Belgium; 2Clinique Saint-Jean, Brussels, BelgiumPurpose: To evaluate the subjective and objective visual results after the implantation of a new trifocal diffractive intraocular lens.Methods: A new trifocal diffractive intraocular lens was designed combining two superimposed diffractive profiles: one with +1.75 diopters (D addition for intermediate vision and the other with +3.50 D addition for near vision. Fifty eyes of 25 patients that were operated on by one surgeon are included in this study. The uncorrected and best distance-corrected monocular and binocular, near, intermediate, and distance visual acuities, contrast sensitivity, and defocus curves were measured 6 months postoperatively. In addition to the standard clinical follow-up, a questionnaire evaluating individual satisfaction and quality of life was submitted to the patients.Results: The mean age of patients at the time of surgery was 70 ± 10 years. The mean uncorrected and corrected monocular distance visual acuity (VA were LogMAR 0.06 ± 0.10 and LogMAR 0.00 ± 0.08, respectively. The outcomes for the binocular uncorrected distance visual acuity were almost the same (LogMAR −0.04 ± 0.09. LogMAR −010 ± 0.15 and 0.02 ± 0.06 were measured for the binocular uncorrected intermediate and near VA, respectively. The distance-corrected visual acuity was maintained in mesopic conditions. The contrast sensitivity was similar to that obtained after implantation of a bifocal intraocular lens and did not decrease in mesopic conditions. The binocular defocus curve confirms good VA even in the intermediate distance range, with a moderate decrease of less than LogMAR 0.2 at −1.5 D, with respect to the best distance VA at 0 D defocus. Patient satisfaction was high. No discrepancy between the objective and subjective outcomes was evidenced.Conclusion: The introduction of a third focus in diffractive multifocal

  15. A previsibilidade biométrica nas lentes intra-oculares multifocais Biometric predictability in multifocal intraocular lens

    Directory of Open Access Journals (Sweden)

    Augusto Cézar Lacava

    2007-08-01

    Full Text Available OBJETIVO: Apresentar a previsibilidade biométrica, avaliando a refração pós-operatória e acuidade visual (AV, em olhos submetidos a implante de lente intra-ocular multifocal. MÉTODOS: Estudo retrospectivo em 88 olhos de 50 pacientes, submetidos à facoemulsificação com implante de lentes multifocais, de três marcas comerciais ReSTOR, ReZoom e Tecnis. No exame biométrico foram utilizados a biometria óptica ou biometria por interferometria de baixa coerência, associada ao uso de tomógrafo de segmento anterior e à fórmula biométrica Holladay II. Com a refração pós-operatória, acuidade visual e a dioptria da LIO implantada, segundo a fórmula Holladay II, calculamos o valor da lente intra-ocular (LIO a ser implantada caso utilizássemos as fórmulas SRKT e Haigis. Os resultados foram avaliados por métodos estatísticos. RESULTADOS: Todos os olhos obtiveram AV igual ou maior a 20/40 e J3 sem correção. As fórmulas Holladay II, SRKT e Haigis apresentaram performance semelhante em todos os grupos de olhos. CONCLUSÃO: A utilização de novas tecnologias, como a biometria óptica e fórmulas de última geração, favorecem a obtenção do resultado refracional almejado com grande previsibilidade.PURPOSE: To present biometric predictability, evaluating postoperative refraction and visual acuity in eyes submitted to multifocal intraocular lens implantation. METHODS: Retrospective study in 88 eyes of 50 patients, submitted to phacoemulsification with multifocal lens implant of three commercial brands: ReSTOR, ReZoom and Tecnis. For biometric examination were used: optic biometry associated to the use of tomography of anterior segment and Holladay II biometric formula. With postoperative refraction, visual acuity and implanted IOL, according to Holladay II formula, we calculated the value of IOL to be implanted in case we used SRKT and Haigis formulas. The results were evaluated according to statistical methods. RESULTS: All eyes

  16. Iris reconstruction combined with iris-claw intraocular lens implantation for the management of iris-lens injured patients

    Science.gov (United States)

    Hu, Shufang; Wang, Mingling; Xiao, Tianlin; Zhao, Zhenquan

    2016-01-01

    Aim: To study the efficiency and safety of iris reconstruction combined with iris-claw intraocular lens (IOL) implantation in the patients with iris-lens injuries. Settings and Design: Retrospective, noncomparable consecutive case series study. Materials and Methods: Eleven patients (11 eyes) following iris-lens injuries underwent iris reconstructions combined with iris-claw IOL implantations. Clinical data, such as cause and time of injury, visual acuity (VA), iris and lens injuries, surgical intervention, follow-up period, corneal endothelial cell count, and optical coherence tomography, were collected. Results: Uncorrected VA (UCVA) in all injured eyes before combined surgery was equal to or <20/1000. Within a 1.1–4.2-year follow-up period, a significant increase, equal to or better than 20/66, in UCVA was observed in six (55%) cases, and in best-corrected VA (BCVA) was observed in nine (82%) cases. Postoperative BCVA was 20/40 or better in seven cases (64%). After combined surgery, the iris returned to its natural round shape or smaller pupil, and the iris-claw IOLs in the 11 eyes were well-positioned on the anterior surface of reconstructed iris. No complications occurred in those patients. Conclusions: Iris reconstruction combined with iris-claw IOL implantation is a safe and efficient procedure for an eye with iris-lens injury in the absence of capsular support. PMID:27146932

  17. Safety and efficacy of phacoemulsification and intraocular lens implantation through a small pupil using minimal iris manipulation

    Science.gov (United States)

    Papaconstantinou, Dimitris; Kalantzis, George; Brouzas, Dimitris; Kontaxakis, Anastasios; Koutsandrea, Chryssanthi; Diagourtas, Andreas; Georgalas, Ilias

    2016-01-01

    Purpose The aim of this study was to compare the results of phacoemulsification through a small pupil using minimal iris manipulation versus phacoemulsification through a well-dilated pupil. Methods This prospective randomized control (comparative) study comprised 78 patients (group I) with a maximally dilated pupil size of ≤4.00 mm and 45 patients (group II) with dilated pupil size of ≥7.00 mm. In group I patients, only viscodilation and minimal push-and-pull iris stretching with two collar-button iris-retractor hooks were utilized without iris manipulation. Phacoemulsification was performed by two senior surgeons and the technique used consisted of either stop and chop or quick chop, infusion/aspiration of lens cortex, capsular bag refill with ocular viscoelastic devices, and implantation of an acrylic foldable intraocular lens. Patients were examined on the first day and 1 month postoperatively. Results Forty-six eyes of group I patients had pseudoexfoliation syndrome, eleven eyes had previous glaucoma surgery, 14 eyes had angle-closure or open-angle glaucoma, and seven eyes had posterior synechiae with iritis. In group I patients, the mean pupil size measured under an operating microscope was 3.2 mm preoperatively, 4.3 mm after viscoelastic and mechanical pupil dilation, and 4.1 mm at the end of a surgical procedure. Rupture of the zonular fibers occurred in six patients of group I and the intraocular lens was implanted in the sulcus. Small iris-sphincter rupture and small hemorrhages occurred in four eyes during pupillary manipulation, but they were not evident at the end of the surgery. In group II patients, no intraoperative complications occurred. Signs of significant corneal edema and iritis were observed more frequently in group I eyes (26 eyes and 20 eyes, respectively) on the first postoperative day in comparison with group II eyes (ten eyes and six eyes, respectively). Intraocular pressure was <20 mmHg in all eyes of both groups. One month

  18. Safety and efficacy of phacoemulsification and intraocular lens implantation through a small pupil using minimal iris manipulation

    Directory of Open Access Journals (Sweden)

    Papaconstantinou D

    2016-05-01

    Full Text Available Dimitris Papaconstantinou, George Kalantzis, Dimitris Brouzas, Anastasios Kontaxakis, Chryssanthi Koutsandrea, Andreas Diagourtas, Ilias Georgalas Department of Ophthalmology, National and Kapodistrian University of Athens, Athens, Greece Purpose: The aim of this study was to compare the results of phacoemulsification through a small pupil using minimal iris manipulation versus phacoemulsification through a well-dilated pupil.Methods: This prospective randomized control (comparative study comprised 78 patients (group I with a maximally dilated pupil size of ≤4.00 mm and 45 patients (group II with dilated pupil size of ≥7.00 mm. In group I patients, only viscodilation and minimal push-and-pull iris stretching with two collar-button iris-retractor hooks were utilized without iris manipulation. Phacoemulsification was performed by two senior surgeons and the technique used consisted of either stop and chop or quick chop, infusion/aspiration of lens cortex, capsular bag refill with ocular viscoelastic devices, and implantation of an acrylic foldable intraocular lens. Patients were examined on the first day and 1 month postoperatively.Results: Forty-six eyes of group I patients had pseudoexfoliation syndrome, eleven eyes had previous glaucoma surgery, 14 eyes had angle-closure or open-angle glaucoma, and seven eyes had posterior synechiae with iritis. In group I patients, the mean pupil size measured under an operating microscope was 3.2 mm preoperatively, 4.3 mm after viscoelastic and mechanical pupil dilation, and 4.1 mm at the end of a surgical procedure. Rupture of the zonular fibers occurred in six patients of group I and the intraocular lens was implanted in the sulcus. Small iris-sphincter rupture and small hemorrhages occurred in four eyes during pupillary manipulation, but they were not evident at the end of the surgery. In group II patients, no intraoperative complications occurred. Signs of significant corneal edema and iritis

  19. Surface PEGylation of intraocular lens for PCO prevention: An in vivo evaluation.

    Science.gov (United States)

    Xu, Xu; Tang, Jun-Mei; Han, Yue-Mei; Wang, Wei; Chen, Hao; Lin, Quan-Kui

    2016-07-01

    Posterior capsular opacification (PCO) is a common complication in cataract surgery. The development of PCO is attributed to the combination of adhesion, migration, proliferation, and transdifferentiation of the residual lens epithelial cells (LEC) onto the interface of intraocular lens (IOL) material and lens posterior, in which the initial adhesion is the beginning step and plays important roles. In the present study, hydrophilic polyethylene glycol (PEG) was immobilized onto IOL surface via plasma-aided chemical grafting procedure. The attenuated total reflection - Fourier transform infrared (ATR-FTIR) and contact angle (CA) - measurements indicate the successful surface PEGylation, as well as the excellent hydrophilicity of the surfaces. Compared with pristine IOL, the PEGylation does not influent its optical property, whereas the initial adhesion of LEC is greatly inhibited. In vivo ocular implantation results show that the PEGylated IOL presents good in vivo biocompatibility, and can effectively prevent the PCO development.

  20. Clinical Observation of 126 Cases of Sutureless Phacoemulsification with PMMA Intraocular Lens Implantation

    Institute of Scientific and Technical Information of China (English)

    Yanshuang Yan; Zhengxing Mao

    2000-01-01

    Objective: To observe the safety and effect of sutureless phacoemulsification with PMMA intraocular lens (IOL) implantation.Methods: One-hundred and twenty-six cases (126 eyes) of sutureless phacoemulsification with PMMA intraocular lens (IOL) implantation were retrospected and evaluated. The surgeries were performed through a limbal tunnel incision. PMMA IOLs with 5.5mm or 6.0mm in diameter were implanted.Results: The follow-up was 3~20 months. Visual acuity of 0. 5 or better was obtained in 120 cases (95.2%), and that of 1.0 or better was obtained in 89 cases (70. 6% ).Intra-operative complications included posterior capsule rupture in 9 cases (7. 1% ) and iris injury in 7 cases(5.6% ). Postoperative complications included early corneal edema in 96 cases(76.2% ), transient intraocular pressure elevation in 5 cases(4. 3%),remnant of cortex in 1 case and leakage of incision in 1 case. M1 were properly managed with good results.Conclusion: Sutureless phacoemulsification with PMMA IOL implantation is safe even in grass-root hospitals where cataracts are harder.

  1. Experimental study on cyclosporine A drug delivery system in prevention of posterior capsule opacification after intraocular lens implantation in rabbits

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Objective To study the effect of cyclosporine A drug delivery system (CsA-DDS) on the prevention of posterior capsule opacification (PCO) after experimental intraocular lens implantation in rabbit eyes. Methods Twenty healthy New Zealand white rabbits, whose left eyes and right eyes were used respectively as experiment eyes and controls, were subjected to extracapsular lens extraction and artificial lens implantation. During the operation, CsA-DDS with poly (lactideco-glycolide) as carriers or empty DDS was...

  2. Distribution of salicylate in lens and intraocular fluids and its effect on cataract formation.

    Science.gov (United States)

    Cotlier, E; Sharma, Y R; Niven, T; Brescia, M

    1983-06-14

    Retrospective studies on cataract development in patients with rheumatoid arthritis or osteoarthritis revealed a retardant effect of aspirin on diabetic and non-diabetic cataracts. The effect of aspirin is dose-dependent. The correlation coefficient between years delay for various cataracts subcategories versus aspirin taken (in tablets per day X years of intake) was 0.69. The ocular pharmacokinetics of 14C acetylsalicylic acid or salicylate were determined after intravenous or intraperitoneal administration to rabbits. 14C acetylsalicylic acid penetrates rapidly into rabbit lens and aqueous humor after intravenous administration. After intraperitoneal administration, salicylate levels in rabbit plasma, similar to those of humans receiving four to six aspirin tablets (325 mg each), result in accumulation of salicylate by lens (mean +/- SD) of 405 +/- 72 mumoles/g and 620 +/- 30 mumoles/g at two and four hours, respectively. At those dosages, salicylate is cleared in 24 hours from rabbit plasma and intraocular fluids, but retained by lens. Penetration of salicylate into rabbit lens and rat lens is dose-dependent. The retardant aspirin effect in diabetic cataracts is linked to inhibition of tissue aldose reductase and lens protein glycosylation. Deceleration of galactose cataract formation in rats occurs after daily salicylate intraperitoneal injections of 100 mg/kg a day. PMID:6859071

  3. 高度近视有晶状体眼后房型人工矫正晶状体植入术后视觉质量的临床评价%Clinical evaluation of visual quality following implantation of posterior chamber phakic intraocular corrective lens for high myopia

    Institute of Scientific and Technical Information of China (English)

    王松田; 郑广瑛; 李志刚; 王洁; 赵丽君; 王瑞娜

    2011-01-01

    Background Implantation of phakic posterior chamber intraocular corrective lens(ICL)is a new choice for correction of high myopia.Different from laser assisted in situ keratomileusis,implantation of phakic posterior chamber ICL will allow the good imaging quality because it remaines the matched relationship between cornea and lens.But its visual quality after operation is concerned by patient and ophthalmologists.ObjectiveThis study was to observe the effectiveness of implantation of posterior chamber phakic ICL on visual quality in patients with high myopia.Methods Eighty-four high myopia eyes of 42 patients accepted implantation of posterior chamber phakic ICL and follow-up of 6-month duration.The visual acuity,refractive status,wavefront,contrast sensitivity and accommodation were examined and compared before and after surgery.This clinical study complied with Declaration of Helsinki.The written informed consent was obtained from each patient before operation.Results A prospective observational trial design was used.The uncorrected visual acuity and best corrected visual acuity after operation were better than preoperative ones in all of the patients.The eye numbers of > 0.3 were increased after operation in comparison with before operation with a stable result among 1 day,1 month and 6 months after surgery (x2 =10.70,P>0.05).Spherical equivalent refraction was(-15.38 ± 1.03)D before surgery and(+0.55 ±0.06)at 1 day,(-1.22±0.09)D at 1 month and(-0.68 ± 0.06)D after 6 months,showing a significant difference among them(F=16 559.90,P<0.05).Total aberrations and higher-order aberrations were 11.00±0.25 and 0.43 ±0.05 before surgery,the wavefront aberrations were 2.21 ± 0.56 and 0.47±0.04 at 6 months after surgery with significant difference(t =1.65,P =0.10).Each spatial frequency contrast sensitivity and glare sensitivity on photopic and seotopie conditions in postoperation were higher compared with the preoperative(P<0.05).The accommodation in 1

  4. Customized toric intraocular lens implantation for correction of extreme corneal astigmatism due to corneal scarring

    Directory of Open Access Journals (Sweden)

    R Bassily

    2010-03-01

    Full Text Available R Bassily, J LuckOphthalmology Department, Royal United Hospital, Combe Park, Bath, UKAbstract: A 76-year-old woman presented with decreased visual function due to cataract formation. Twenty-five years prior she developed right sided corneal ulceration that left her with 10.8 diopters (D of irregular astigmatism at 71.8° (steep axis. Her uncorrected visual acuity was 6/24 and could only ever wear a balanced lens due to the high cylindrical error. Cataract surgery was planned with a custom designed toric intraocular lens (IOL with +16.0 D sphere inserted via a wound at the steep axis of corneal astigmatism. Postoperative refraction was -0.75/+1.50 × 177° with a visual acuity of 6/9 that has remained unchanged at six-week follow-up with no IOL rotation. This case demonstrates the value of high power toric IOLs for the correction of pathological corneal astigmatism.Keywords: intraocular lens, corneal ulceration, visual acuity, scarring

  5. Toric markers-assisted implantation of the scleral-fixated intraocular lens

    Science.gov (United States)

    Song, Hu-Ping; Tian, Bing-Yu; Peng, Jing

    2016-01-01

    AIM To evaluate the efficacy of toric intraocular lens markers-assisted implantation of the scleral-fixated intraocular lens (SFIOL). METHODS From October 2010 to December 2013, all patients who had undergone secondary SFIOL implantation were assigned to group 1 and 2, in group 1 SFIOL was performed with the assist of radial keratotomy (RK)-marker, and in group 2 SFIOL was performed with the assisted of toric intraocular lens markers (T-and axis markers). Patients' demographic data and information on baseline preoperative visual acuity, indication for surgery and latest postoperative visual acuity were collected and analyzed. The haptic and optic positions were determined by ultrasound biomicroscopy. The optic tilt angle and decentration distance were measured. RESULTS The study evaluated 43 eyes of 43 patients ranging in age from 3 to 66y. Group 1 comprised 24 eyes (24 patients) and group 2, 19 eyes (19 patients). Uncorrected reoperative acuity was improved on all the eyes postoperatively. The improved postoperative acuity was significantly more in group 2 than that in group 1 (1.11±0.38 vs 0.82±0.45 logMAR; F=4.85, P=0.03). Ultrasonic biomicrograph examination showed that the rate of haptic asymmetry was significantly higher in group 1 (42%, 10/24) than that in group 2 (11%; 2/19) (Chi square=3.68, P=0.04). The mean tilted degree in group 1 was significantly higher than that in group 2 (P=0.04). Mean decentration distance in group 1 was greater than that in group 2 (P=0.03). CONCLUSION During SFIOL the toric markers help the surgeon identify the placement of fixation more precisely than that with the use of RK marker. PMID:27672593

  6. Intra-operative assessment of toric intra-ocular lens implantation

    Directory of Open Access Journals (Sweden)

    Tsinopoulos Ioannis

    2011-01-01

    Full Text Available We report a new procedure for intra-operative toric intra-ocular lens (IOL axis assessment in order to achieve optimal implantation. IOL implantation procedure was directly recorded. An assessor estimated the angle formed by the marked 0-180 axis and the toric IOL axis after implantation with the use of the appropriate software. If IOL implantation was assessed to be inaccurate, the surgeon was advised to correct IOL positioning by rotating the IOL clockwise. The assessment procedure was repeated until accurate IOL positioning was achieved.

  7. A slide rule for calculating the power of an intraocular lens.

    Science.gov (United States)

    Wang, G J; Pomerantzeff, O; Miao, T Y

    1983-01-01

    We have designed a slide rule to calculate the emmetropizing and iseikonizing power of an intraocular lens (IOL). Like the dial biometer currently used for these calculations, the slide rule is inexpensive, easy to use, simple, and a compact pocket size. It can, however, also be used to calculate postoperative refractive error, corneal power when various keratometers are used, and conversion of refractive correction at the spectacle frame to that at the cornea, or vice versa. All the calculated data are within the accuracy suitable for clinical work. PMID:6630016

  8. Innovative confocal laser method for exact dioptric power measurement of intraocular lens implants Invited Paper

    Institute of Scientific and Technical Information of China (English)

    Ilko K. Ilev; Robert W. Faaland; Do-Hyun Kim; Robert H. James; Don Calogero

    2008-01-01

    We present a novel confocal laser method (CLM) for precise testing of the dioptric power of both positive and negative intraocular lens (IOL) implants. The CLM principle is based on a simple fiber-optic confocal laser design including a single-mode fiber coupler that serves simultaneously as a point light source used for formation of a collimated Gaussian laser beam, and as a highly sensitive confocal point receiver. The CLM approach provides an accurate, repeatable, objective, and fast method for IOL dioptric power measurement over the range from 0 D to greater than =t=30 D under both dry and in-situ simulated conditions.

  9. The Comprehensive Control of Astigmatism during and Following Intraocular Lens Implantation.

    Institute of Scientific and Technical Information of China (English)

    1994-01-01

    The operating corneoloscope and Terry operative keratometer were used respectively in 29 and 34 eyes during the intraocular lens implantation to measure the corneal astigmatism qualitatively or quantitatively,so that the tension of incision closure could be adjusted. The surgically induced astigmatism in qualitative group two weeks after the operation was 3. 5 ± 1. 70 D and that in quantitative group was 2. 56±1. 60 D. There were 55.17% and 38. 24% of the eyes with over 2. 00 D corneal astigmatism in qu...

  10. An investigation on dysphotopsia of a sigma-edged intraocular lens

    Institute of Scientific and Technical Information of China (English)

    Zhishan Gao; Meimei Kong; Xinhua Li; Lei Chen; Rihong Zhu

    2006-01-01

    @@ A sigma-edged design of intraocular lens (IOL) is proposed to minimize the reflected glare images associated with the edge. The optimal sigma inverse edge is investigated when pupil diameter is 5.0 mm by the established Escudero-Sanz's wide angle model. The non-sequential ray tracing program of Zemax-EE (Zemax Development Corp., San Diego, USA) is used to investigate the sigma edge of reducing the potential for edge glare phenomena. The results show that sigma-edged design can significantly reduce the reflected glare intensity on retina if the angle of its inverse edge is taken from 20 to 70 degrees.

  11. Fungal endophthalmitis caused by Paecilomyces variotii, in an immunocompetent patient, following intraocular lens implantation

    Directory of Open Access Journals (Sweden)

    Anita K

    2010-01-01

    Full Text Available We report the case of a 70-year-old man who was admitted for anterior endophthalmitis following an intraocular lens implantation. He had developed a fluffy growth resembling a fungal mass on the iris of the right eye. The mass was removed and sent for fungal studies to our department. Direct microscopy revealed hyphae. Further studies helped identify the fungus to belong to genus Paecilomyces. This is a rare case of fungal endophthalmitis caused by Paecilomyces variotii in an immunocompetent person.

  12. Toxic Anterior Segment Syndrome after Foldable Artiflex Iris-Fixated Phakic Intraocular Lens Implantation

    Directory of Open Access Journals (Sweden)

    Lucien A. M. van Philips

    2011-01-01

    Full Text Available Toxic anterior segment syndrome (TASS developed in four cases after uneventful implantation of a foldable iris-fixated phakic intraocular lens (pIOL. Two cases occurred sequentially in one patient. The TASS subsided without complications in all cases after intensive topical steroid treatment. A multitude of possible causes is considered for the occurrence of these TASS cases. From the sterilization and cleaning of surgical instruments to the possibility of endotoxines in ophthalmic viscosurgical devices (OVD. These rare cases should alert the surgeon to the possibility of TASS after pIOL implantation.

  13. 有晶状体眼后房型人工晶状体植入矫正高度近视的中远期疗效评价%Mid-long term follow-up results in correction of extreme mvopia by posterior chamber phakic intraocular lens

    Institute of Scientific and Technical Information of China (English)

    周天安; 沈晔; 汪阳; 夏建华

    2012-01-01

    Objective To evaluate the mid-long term stability and safety of posterior chamber phakic intraocular lens (ICL) implantation for the correction of extreme myopia. Methods This retrospective study included 993 eyes of 498 patients received ICL implantation from June 1996 to December 2008.Multivariate analysis and variance analysis were used to evaluate the stability of the results and to identify risk factors of the complications. Results Successful implantation was achieved in all patients.Spherical equivalent(SE) was (16.23 ±4.12,mean ±SD) D before the operation and ( -0.92 ± 1.22) D at the last examination. Intraocular pressure was (13.58 ± 2.93) mm Hg( 1 mm Hg =0.133 kPa)preoperatively which was ( 13.90 ± 3.01 ) mm Hg at the last examination. There was no statistical significance in follow-up( t =0.44 ~1.30,P > 0.05 ).Endothelial cell density was (2858.21 ± 395.13 )/mm2 before the operation and (2567.19 ± 423.45 ) /mm2 at last examination.Pupillary block glaucoma occurred in 2 eyes (0.2% ) at two hours and 1 eye (0.1% ) at one month after the operation.Three eyes developed anterior cataracts between 6 months to 1 year after ICL implantation and another 2 eyes subcapsular opacification at semi-peripheral regions occurred 4 years after the operation,and was not related with age,SE and vaults (F=2.42,1.98,0.81,P>0.05). Macular puckers were found in 5 eyes (0.5%) 1 year postoperatively,including 2 eyes developed choroidal neovascularization and received PDT,best corrected visual acuity lost more than 2 lines.Retinal detachment occurred in 2 eyes at 1.5 years after the operation.Acute iritis happened in 1 eye (0.1% ) and chronic iritis in 1 eye (0.1% ) which combined with slight pupil distortion and elevation of intraocular pressure.Iris stroma atrophy and pupil distortion were found in 2 eyes (0.2% ).Conclusion Correction of high myopia by ICL implantation is a safe procedure and the results are stable.%目的 总结有晶状体眼后房

  14. Eye models for the prediction of contrast vision in patients with new intraocular lens designs

    Science.gov (United States)

    Piers, Patricia A.; Sverker Norrby, N. E.; Mester, Ulrich

    2004-04-01

    Theoretical calculations of the polychromatic modulation transfer function (MTF) and wave-front aberration were performed with physiological eye models. These eye models have an amount of spherical aberration that is representative of a normal population of pseudophakic eyes implanted with two different types of intraocular lens (IOL) made from high-refractive-index silicone. These theoretical calculations were compared with the measured contrast sensitivity function (CSF) under mesopic lighting conditions and with wave-front aberration (obtained with a Hartmann-Shack wave-front sensor) collected from 37 patients bilaterally implanted with the same types of lens. The relationships between the ocular wave-front aberration and the MTF predicted by the eye models and the CSF and the ocular wave-front aberration measured in eyes implanted with IOLs were investigated. The predicted improvements in MTF and wave-front aberration correlated well with the improvements measured in practice. Physiological eye models are therefore useful tools for IOL design.

  15. Pars plana vitrectomy with posterior iris claw implantation for posteriorly dislocated nucleus and intraocular lens

    Directory of Open Access Journals (Sweden)

    Kishor B Patil

    2011-01-01

    Full Text Available We evaluated the safety and efficacy of pars plana vitrectomy (PPV with primary posterior iris claw intraocular lens (IOL implantation in cases of posterior dislocation of nucleus and IOL without capsular support. This was a retrospective interventional case series. Fifteen eyes underwent PPV with primary posterior iris claw IOL implantation performed by a single vitreoretinal surgeon. The main outcome measures were changes in best corrected visual acuity and anterior and posterior segment complications. A total of 15 eyes were included in this study. Eight had nucleus drop, three had IOL drop during cataract surgery and four had traumatic posterior dislocation of lens. The final postoperative best corrected visual acuity was 20/60 or better in 11 patients. This procedure is a viable option in achieving good functional visual acuity in eyes without capsular support.

  16. Cell adhesion of F{sup +} ion implantation of intraocular lens

    Energy Technology Data Exchange (ETDEWEB)

    Li, D.J. E-mail: dejunli@hotmail.com; Cui, F.Z.; Gu, H.Q

    1999-04-01

    The cell adhesion of ion implanted polymethylmethacrylate (PMMA) intraocular lens was studied using cultured cells in vitro. F{sup +} ion implantation was performed at the energies of 40, 60, 80, 100 keV with the fluences ranging from 5x10{sup 13} to 1x10{sup 15} ions/cm{sup 2} at room temperature. The cell adhesion tests gave interesting results that the number of the neutral granulocytes and the macrophages adhering on surface were reduced significantly after ion implantation. The optimal fluence was about 4x10{sup 14} ions/cm{sup 2}. The hydrophobicity imparted to the lens surface was also enhanced. The results of X-ray photoelectron spectroscopy analysis indicated that ion implantation resulted in the cleavage of some pendant groups, the oxidation of the surface, and the formation of some new chemical bonds, which was probably the main reason for the cell adhesion change.

  17. The balanced two-string technique for sulcus intraocular lens implantation in the absence of capsular support.

    Science.gov (United States)

    Ibrahim, Hesham A; Sabry, Heba Nabil

    2015-01-01

    Purpose. To describe and explore an alternative approach for sulcus intraocular lens (IOL) implantation in the absence of capsular support. Methods. The commonly available one-piece poly(methyl methacrylate) (PMMA) lens is stabilized in the sulcus by two intraocular horizontal strings of 10/0 polypropylene suture passed through the lens dialing holes in opposite directions to achieve a mechanical balance. The horizontal strings of 10/0 polypropylene work as a rail track for the IOL optics, allowing some side to side lens adjustment even following wound closure. The stability of the IOL was tested in vitro. Six aphakic patients underwent in-sulcus IOL secondary implantation using the balanced two-string technique. Patients were followed up for a minimum of six months. Best spectacle corrected vision was assessed. Lens centration and lens tilt were measured by anterior segment optical coherence tomography (AS-OCT). Results. All patients had successful lens insertion. Best spectacle corrected visual acuity (BSCVA) improved in all patients. Lens decentration ranged between 0.21 mm and 0.9 mm (average 0.53 mm). Lens tilt ranged between 1.2° and 2.8° (average 2.17°). Conclusion. The mechanically balanced two-string technique is an alternative option for sulcus IOL implantation in absence of capsular support, allowing lens centration adjustment with no additional risks.

  18. The Balanced Two-String Technique for Sulcus Intraocular Lens Implantation in the Absence of Capsular Support

    Directory of Open Access Journals (Sweden)

    Hesham A. Ibrahim

    2015-01-01

    Full Text Available Purpose. To describe and explore an alternative approach for sulcus intraocular lens (IOL implantation in the absence of capsular support. Methods. The commonly available one-piece poly(methyl methacrylate (PMMA lens is stabilized in the sulcus by two intraocular horizontal strings of 10/0 polypropylene suture passed through the lens dialing holes in opposite directions to achieve a mechanical balance. The horizontal strings of 10/0 polypropylene work as a rail track for the IOL optics, allowing some side to side lens adjustment even following wound closure. The stability of the IOL was tested in vitro. Six aphakic patients underwent in-sulcus IOL secondary implantation using the balanced two-string technique. Patients were followed up for a minimum of six months. Best spectacle corrected vision was assessed. Lens centration and lens tilt were measured by anterior segment optical coherence tomography (AS-OCT. Results. All patients had successful lens insertion. Best spectacle corrected visual acuity (BSCVA improved in all patients. Lens decentration ranged between 0.21 mm and 0.9 mm (average 0.53 mm. Lens tilt ranged between 1.2° and 2.8° (average 2.17°. Conclusion. The mechanically balanced two-string technique is an alternative option for sulcus IOL implantation in absence of capsular support, allowing lens centration adjustment with no additional risks.

  19. Retropupillary Fixation of Iris-Claw Intraocular Lens for Aphakic Eyes in Children.

    Directory of Open Access Journals (Sweden)

    Martina Brandner

    Full Text Available To report outcome, complications and safety of retropupillary fixated iris-claw intraocular lenses in a pediatric population.Retrospective study.Ten consecutive pediatric patients (15 eyes underwent placement of retropupillary fixated iris-claw intraocular lenses between October 2007 and July 2013 at the Department of Ophthalmology, Medical University Graz and General Hospital Klagenfurt, Austria. Postoperative visual acuity and complications were analyzed.Median final best-corrected visual acuity improved by 0.12 logMAR from preoperative baseline. Mean postoperative spherical equivalent was -0.05 ± 1.76 D. No serious complications were observed intra- or postoperatively during the entire follow-up period of up to 40 months. One patient experienced a haptic disenclavation with IOL subluxation immediately after a car accident.Our study demonstrates that iris-claw intraocular lens implantation behind the iris is safe in children with lack of capsular support and yields excellent visual outcome with low complication rate.

  20. Error induced by the estimation of the corneal power and the effective lens position with a rotationally asymmetric refractive multifocal intraocular lens

    OpenAIRE

    David P. Piñero; Camps, Vicente J.; Ramón, María L.; Mateo, Verónica; Rafael J Pérez-Cambrodí

    2015-01-01

    AIM: To evaluate the prediction error in intraocular lens (IOL) power calculation for a rotationally asymmetric refractive multifocal IOL and the impact on this error of the optimization of the keratometric estimation of the corneal power and the prediction of the effective lens position (ELP). METHODS: Retrospective study including a total of 25 eyes of 13 patients (age, 50 to 83y) with previous cataract surgery with implantation of the Lentis Mplus LS-312 IOL (Oculentis GmbH, Germany). In a...

  1. Toward a Wirelessly Powered On-Lens Intraocular Pressure Monitoring System.

    Science.gov (United States)

    Chiou, Jin-Chern; Hsu, Shun-Hsi; Liao, Yu-Te; Huang, Yu-Chieh; Yeh, Guan-Ting; Kuei, Cheng-Kai; Dai, Kai-Shiun

    2016-09-01

    This paper presents a wireless on-lens intraocular pressure monitoring system, comprising a capacitance-to-digital converter and a wirelessly powered radio-frequency identification (RFID)-compatible communication system, for sensor control and data communication. The capacitive sensor was embedded on a soft contact lens of 200 μm thickness using commercially available biocompatible lens material, to improve compliance and reduce user discomfort. The sensor chip was shown to achieve effective number of bits greater than 10 over a capacitance range up to 50 pF while consuming only 64-μW power. The on-lens capacitive sensor could detect dielectric variation caused by changes in water content from a distance of 2 cm by using incident power from an RFID reader at 20 dBm. The maximum detectable distance was 11 cm with 30-dBm incident RF power. The rise in eye tissue temperature under 30-dBm RF exposure over an interval of 1 s was simulated and found to be less than 0.01°C.

  2. Toward a Wirelessly Powered On-Lens Intraocular Pressure Monitoring System.

    Science.gov (United States)

    Chiou, Jin-Chern; Hsu, Shun-Hsi; Liao, Yu-Te; Huang, Yu-Chieh; Yeh, Guan-Ting; Kuei, Cheng-Kai; Dai, Kai-Shiun

    2016-09-01

    This paper presents a wireless on-lens intraocular pressure monitoring system, comprising a capacitance-to-digital converter and a wirelessly powered radio-frequency identification (RFID)-compatible communication system, for sensor control and data communication. The capacitive sensor was embedded on a soft contact lens of 200 μm thickness using commercially available biocompatible lens material, to improve compliance and reduce user discomfort. The sensor chip was shown to achieve effective number of bits greater than 10 over a capacitance range up to 50 pF while consuming only 64-μW power. The on-lens capacitive sensor could detect dielectric variation caused by changes in water content from a distance of 2 cm by using incident power from an RFID reader at 20 dBm. The maximum detectable distance was 11 cm with 30-dBm incident RF power. The rise in eye tissue temperature under 30-dBm RF exposure over an interval of 1 s was simulated and found to be less than 0.01°C. PMID:27479980

  3. Intraocular pressure and ocular pulse amplitude using dynamic contour tonometry and contact lens tonometry

    Directory of Open Access Journals (Sweden)

    Grus Franz-H

    2004-03-01

    Full Text Available Abstract Background The new Ocular Dynamic Contour Tonometer (DCT, investigational device supplied by SMT (Swiss Microtechnology AG, Switzerland allows simultaneous recording of intraocular pressure (IOP and ocular pulse amplitude (OPA. It was the aim of this study to compare the IOP results of this new device with Goldmann tonometry. Furthermore, IOP and OPA measured with the new slitlamp-mounted DCT were compared to the IOP and OPA measured with the hand-held SmartLens®, a gonioscopic contact lens tonometer (ODC Ophthalmic Development Company AG, Switzerland. Methods Nineteen healthy subjects were included in this study. IOP was determined by three consecutive measurements with each of the DCT, SmartLens®, and Goldmann tonometer. Furthermore, OPA was measured three times consecutively by DCT and SmartLens®. Results No difference (P = 0.09 was found between the IOP values by means of DCT (mean: 16.6 mm Hg, median: 15.33 mm Hg, SD: +/- 4.04 mm Hg and Goldmann tonometry (mean: 16.17 mm Hg, median: 15.33 mm Hg, SD: +/- 4.03 mm Hg. The IOP values of SmartLens® (mean: 20.25 mm Hg, median: 19.00 mm Hg, SD: +/- 4.96 mm Hg were significantly higher (P = 0.0008 both from Goldmann tonometry and DCT. The OPA values of the DCT (mean: 3.08 mm Hg, SD: +/- 0.92 mm Hg were significantly lower (P = 0.0003 than those obtained by SmartLens® (mean: 3.92 mm Hg, SD: +/- 0.83 mm Hg. Conclusions DCT was equivalent to Goldmann applanation tonometry in measurement of IOP in a small group of normal subjects. In contrast, SmartLens® (contact lens tonometry gave IOP readings that were significantly higher compared with Goldmann applanation tonometer readings. Both devices, DCT and SmartLens® provide the measurement of OPA which could be helpful e.g. for the management of glaucoma.

  4. Gauge Transconjunctival Sutureless Vitrectomy in Eyes with Posteriorly Dislocated Intraocular Lens

    Directory of Open Access Journals (Sweden)

    Hüseyin Dündar

    2013-04-01

    Full Text Available Pur po se: To evaluate the efficacy and safety of 23-gauge (23G pars plana vitrectomy (PPV in dislocated intraocular lens (IOL cases: In early- and late-term follow-up. Ma te ri al and Met hod: In this retrospective study, the medical records of 17 patients who underwent 23 G PPV treatment for dislocated IOL between January 2009 and June 2011 were analyzed. Detailed ophthalmologic examination was performed in all patients; intraoperative and postoperative complications were recorded. Re sults: In this study, mean follow-up time was 9.0 (4-22 months and mean age was 60.8 (8-82 years. Mean time after cataract surgery was variable (mean of 28.3 (0-80 months. Four patients had trauma history, five patients had pseudoexfoliation syndrome, and two patients had pathologic myopia. Dislocated IOL was placed into the sulcus in nine patients (52.9%. In two cases (11.7%, the IOLs were removed, and the patients were left aphakic. In two cases out of other 6 (11.7%, the dislocated IOL was changed with scleral fixation lens, whereas in the other four cases (23.5%, IOL was changed with iris claw lens. One patient (5.8% remained at the same level of vision, while twelve (70.5% cases increased two or more lines in BCVA. The vision was decreased in two cases. Intraocular pressure elevation controlled by medication was observed in one case. For two days, hypotony was observed in one patient. Dis cus si on: 23 G PPV technique is an effective and safe method for removing and repositioning of dislocated IOL in the vitreous. (Turk J Ophthalmol 2013; 43: 99-102

  5. Intraocular Lens Multifocality Combined with the Compensation for Corneal Spherical Aberration:A New Concept ofPresbyopia-CorrectingIntraocular Lens

    Directory of Open Access Journals (Sweden)

    Reiner Friedrich

    2012-10-01

    Full Text Available The outcomes of a prospective consecutive study aimed at evaluating the visual and refractive benefit after cataract surgery with the implantation of the aspheric diffractive multifocal intraocular lens (IOL Tecnis ZMB00 (Abbott Medical Optics are reported. A total of 31 eyes of 19 patients (age range, 40 to 81 years underwent phacoemulsification surgery with implantation of this aspheric multifocal IOL. At 6 months after surgery, postoperative spherical equivalent was within ±1.00 D in 96.8% of eyes, with 94.7% of patients presenting a postoperative binocular far LogMAR uncorrected visual acuity (UCVA of 0.1 or better. Far best-corrected distance VA improved significantly (p < 0.01, with postoperative values of 0.1 or better in 96.8% of eyes. Postoperative near UCVA was 0.10 (equivalent to J1 or better in 93.55% of eyes. Furthermore, the IOL power was found to be very poorly correlated with the postoperative far LogMAR (r = 0.13 and near UCVA (r = 0.13. In conclusion, the aspheric diffractive multifocal IOL Tecnis ZMB00 provides a restoration of the far and near visual function after phacoemulsification surgery for cataract removal or presbyopia correction, which is predictable and independent from the optical power of the implanted IOL.

  6. New approach: removal of silicone oil and trocar assisted sutureless scleral fixated intraocular lens implantation at the same session

    Institute of Scientific and Technical Information of China (English)

    Yuksel; Totan; Remzi; Karadag

    2014-01-01

    Dear Sir,Iam Dr.Remzi Karadag,from the Department of Ophthalmology,Istanbul Medeniyet University School of Medicine,Istanbul,Turkey.I write to present two case reports of removal of silicone oil and trocar assisted sutureless scleral fixated intraocular lens implantation at the same session.

  7. In-the-bag decentration of a hydrophilic radially asymmetric multifocal intraocular lens secondary to capsule contraction.

    NARCIS (Netherlands)

    Linden, J.W.M. van der; Meulen, I.J. van der; Mourits, M.P.; Lapid-Gortzak, R.

    2013-01-01

    We report a case of in-the-bag decentration and tilt of a hydrophilic rotationally asymmetric multifocal intraocular lens (IOL) of the M Plus type secondary to capsule contraction. After uneventful surgery and follow-up for 3 months, progressive decentering and tilting of the IOL secondary to capsul

  8. Visual Outcomes and Patient Satisfaction after Refractive Lens Exchange with a Single-Piece Diffractive Multifocal Intraocular Lens

    Directory of Open Access Journals (Sweden)

    John S. M. Chang

    2014-01-01

    Full Text Available Purpose. To report visual outcomes and patient satisfaction after unilateral or bilateral refractive lens exchange (RLE with a single-piece bifocal diffractive multifocal intraocular lens (MIOL. Methods. All patients underwent RLE with the ZMB00 MIOL (Abbott Medical Optics. Patient charts were reviewed to evaluate the distance, intermediate, and near visual acuity (VA, contrast sensitivity, extent of visual symptoms (0–5, satisfaction (1–5, and rate of spectacle independence between unilateral and bilateral RLE group. Results. Forty-seven eyes of 28 patients were included. No intraoperative complications developed. Mean monocular uncorrected VA at distance, intermediate (67 cm, and near (30 cm were 0.01±0.12 (standard deviation, 0.27±0.18, and 0.15±0.11, respectively. No eyes lost >1 line of corrected distance VA. Monocular contrast sensitivity remained at normal level. Median scores of halos, night glare, and starbursts for 27 patients were 2.0, 3.0, and 0.0, respectively. Median score of satisfaction was 4.0. There were no differences in visual symptom scores or satisfaction between unilateral and bilateral group (P>0.05. Eighty percent of 25 patients reported total spectacle freedom, with similar rate between bilateral (82% and unilateral group (75% (P=1.000. Conclusions. RLE with the bifocal diffractive MIOL was safe in presbyopic patients and resulted in a high rate of spectacle independence.

  9. Biological safety of hydrophobic acrylic foldable intraocular lens%疏水性丙烯酸酯折叠式人工晶体的生物安全性

    Institute of Scientific and Technical Information of China (English)

    段晓杰; 姜宝光; 王召旭

    2015-01-01

    背景:在临床试验前,需对疏水性丙烯酸酯人工晶体以新西兰白兔作为植入对象进行生物学评价。目的:观察新型疏水性丙烯酸酯折叠式人工晶体的生物安全性。方法:取新西兰家兔12只,右侧眼做实验眼,植入沈阳百奥医疗器械有限公司研制疏水性丙烯酸酯折叠式人工晶体,左侧眼做对照眼,植入美国爱尔康公司的Acrysof IQ SN60WF人工晶体。结果与结论:与对照眼相比,兔实验眼植入后各时间点角膜、前房、植入物位置、眼后节变化差异无显著性意义;且角膜和晶体囊袋无炎症反应,组织增生差异无显著性意义;人工晶体表面无巨噬细胞等炎症细胞,晶体表面、襻根部可见纤维组织。说明此款新材料与临床中已经广泛应用的产品无显著差别,即具有生物安全性。%BACKGROUND:Hydrophobic acrylic foldable intraocular lens should be evaluated biologicaly with New Zealand rabbits as implant objects prior to clinical trial. OBJECTIVE:To observe the biological safety of hydrophobic acrylic foldable intraocular lens. METHODS: Twelve New Zealand rabbits were enroled. The right eyes were implanted with self-developed hydrophobic acrylic foldable intraocular lens (Shenyang Baiao Medical Device Co., Ltd., China) as experimental group, and the left eyes were implanted with Acrysof IQ SN60WF (Alcon, USA) as control group. RESULTS AND CONCLUSION: After implantation, there were no significant differences in the cornea, anterior chamber, implant position, posterior segment of eyebal between two groups. Tissue proliferation had no obviously difference between the two groups, and there were cornea and lens pouch inflammations. No macrophages and other inflammatory cels were visualized on the surface of intraocular lens, and fibrous tissues were found on the intraocular lens surface and in the haptics root. These findings suggest that the self-developed hydrophobic acrylic

  10. Iatrogenic Lens Injuries

    Directory of Open Access Journals (Sweden)

    Ümit Kamış

    2012-12-01

    Full Text Available During intraocular surgery, undesired damages of various etiology may occur in adjacent tissues. One of these tissues is the crystalline lens, which may be traumatized both in anterior segment and posterior segment surgeries, and when damaged, it usually causes marked decrease in visual acuity. The leading causes of iatrogenic lens injuries are intravitreal injection, laser iridotomy, phakic intraocular lens implantation, anterior chamber paracentesis, and vitreoretinal surgery. When crystalline lens damage occurs, its negative effect on visual function may be eliminated by performing cataract surgery intraoperatively or in elective conditions. (Turk J Ophthalmol 2012; 42: Supplement 27-30

  11. Error induced by the estimation of the corneal power and the effective lens position with a rotationally asymmetric refractive multifocal intraocular lens

    Institute of Scientific and Technical Information of China (English)

    David; P.Piero; Vicente; J.Camps; María; L.Ramón; Verónica; Mateo; Rafael; J.Pérez-Cambrodí

    2015-01-01

    AIM : To evaluate the prediction error in intraocular lens(IOL) power calculation for a rotationally asymmetric refractive multifocal IOL and the impact on this error of the optimization of the keratometric estimation of the corneal power and the prediction of the effective lens position(ELP).METHODS: Retrospective study including a total of 25 eyes of 13 patients(age, 50 to 83y) with previous cataract surgery with implantation of the Lentis Mplus LS-312 IOL(Oculentis Gmb H, Germany). In all cases, an adjusted IOL power(P IOLadj) was calculated based on Gaussian optics using a variable keratometric index value(n kadj) for the estimation of the corneal power(P kadj) and on a new value for ELP(ELP adj) obtained by multiple regression analysis.This P IOLadj was compared with the IOL power implanted(P IOLReal) and the value proposed by three conventional formulas(Haigis, Hoffer Q and Holladay Ⅰ).RESULTS: P IOLReal was not significantly different than P IOLadj and Holladay IOL power(P >0.05). In the Bland and Altman analysis, P IOLadj showed lower mean difference(-0.07 D) and limits of agreement(of 1.47 and-1.61 D)when compared to P IOLReal than the IOL power value obtained with the Holladay formula. Furthermore, ELP adj was significantly lower than ELP calculated with other conventional formulas(P <0.01) and was found to be dependent on axial length, anterior chamber depth and P kadj. CONCLUSION: Refractive outcomes after cataract surgery with implantation of the multifocal IOL Lentis Mplus LS-312 can be optimized by minimizing thekeratometric error and by estimating ELP using a mathematical expression dependent on anatomical factors.

  12. 新型多焦点人工晶状体临床应用的研究进展%Clinical application of new types of multifocal intraocular lens

    Institute of Scientific and Technical Information of China (English)

    张景尚; 万修华

    2015-01-01

    近年来新型多焦点人工晶状体(IOL)如非球面多焦点IOL、Toric多焦点IOL和非球面Toric多焦点IOL等的不断问世及临床应用,更好地改善了白内障患者术后的生活视力、工作视力以及生存质量.对于新型多焦点IOL的适应证应严格掌握,以使患者术后获得最佳效果.%In recent years new types of multifocal intraocular lens have been developed,such as aspheric multifocal intraocular lens,Toric multifocal intraocular lens and aspheric Toric multifocal intraocular lens and so on.The vision in life and work and the quality of life in patients with cataract were significantly improved after phacoemulsification with the new types of multifocal intraocular lens.At the same time there should be a strict indications for the new types of multifocal intraocular lens,so as to make the cataract patients implanted multifocal intraocular lens getting the best visual quality.

  13. A safe method of ciliary sulcus fixation of foldable intraocular lens using a ciliary sulcus guide.

    Science.gov (United States)

    Can, Ertuğrul; Gül, Adem; Birinci, Hakkı

    2016-08-01

    To describe a novel technique for implantation of intraocular lens in the absence of capsular support using a ciliary sulcus guide. Based on the anatomic knowledge of the ciliary sulcus and the sclera, a new instrument was developed to pierce the needle safely through the ciliary sulcus and sclera. While the foldable lens is stored inside the cartridge, the leading haptic is sutured with a cow-hitch knot. The needle is then inserted into the ciliary sulcus guide. The tip of the guide is inserted from the corneal incision and proceeded under the iris to touch and fit the ciliary sulcus. The needle is pushed from back side. The needle comes out at precise point at the sclera. Implantation of the lens was performed through a 2.8 mm clear cornea incision using the injector. The trailing haptic is tied after implantation, and then the same procedure is performed at the opposite side. We performed this technique to 15 aphakic eyes without sufficient capsular support. There was no bleeding or other intraoperative complication. All the points coming out the sclera were between 2 and 2.5 mm from the limbus. The ab interno technique for scleral fixation of IOL is quicker, easier and less traumatic then ab externo techniques. A new ciliary sulcus guide which is usable with both straight and curved needles eliminates the blind maneuvers of ab interno technique and makes this technique more safe and precise.

  14. Effect of pupillary dilation on Haigis formula-calculated intraocular lens power measurement by using optical biometry

    Science.gov (United States)

    Khambhiphant, Bharkbhum; Sasiwilasagorn, Suganlaya; Chatbunchachai, Nattida; Pongpirul, Krit

    2016-01-01

    Purpose The purpose of this study was to evaluate the effect of pupillary dilation on the Haigis formula-calculated intraocular lens (IOL) power and ocular biometry measurements by using IOLMaster®. Methods A prospective study was performed for biometry measurements of 373 eyes of 192 healthy subjects using the IOLMaster at the outpatient department of King Chulalongkorn Memorial Hospital from February 2013 to July 2013. The axial length (AL), anterior chamber depth (ACD), keratometry (K), and IOL power were measured before and after 1% tropicamide eye drop instillation. The Haigis formula was used in the IOL power calculation with the predicted target to emmetropia. Each parameter was compared by a paired t-test prior to and after pupillary dilation. Bland–Altman plots were also used to determine the agreement between each parameter. Results The mean age of the subjects was 53.74±14.41 years (range 18–93 years). No differences in AL (P=0.03), steepest K (P=0.42), and flattest K (P=0.41) were obtained from the IOLMaster after pupillary dilation. However, ACD and IOL power were significantly different postdilation (Pformulas that use parameters other than AL and K.

  15. Effect of pupillary dilation on Haigis formula-calculated intraocular lens power measurement by using optical biometry

    Directory of Open Access Journals (Sweden)

    Khambhiphant B

    2016-07-01

    Full Text Available Bharkbhum Khambhiphant,1 Suganlaya Sasiwilasagorn,2 Nattida Chatbunchachai,3 Krit Pongpirul2,4 1Department of Ophthalmology, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, 2Department of Ophthalmology, Faculty of Medicine, Chulalongkorn University, Bangkok, 3Department of Ophthalmology, Samut Prakan Hospital, Samut Prakan, Thailand; 4Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA Purpose: The purpose of this study was to evaluate the effect of pupillary dilation on the Haigis formula-calculated intraocular lens (IOL power and ocular biometry measurements by using IOLMaster®. Methods: A prospective study was performed for biometry measurements of 373 eyes of 192 healthy subjects using the IOLMaster at the outpatient department of King Chulalongkorn Memorial Hospital from February 2013 to July 2013. The axial length (AL, anterior chamber depth (ACD, keratometry (K, and IOL power were measured before and after 1% tropicamide eye drop instillation. The Haigis formula was used in the IOL power calculation with the predicted target to emmetropia. Each parameter was compared by a paired t-test prior to and after pupillary dilation. Bland–Altman plots were also used to determine the agreement between each parameter. Results: The mean age of the subjects was 53.74±14.41 years (range 18–93 years. No differences in AL (P=0.03, steepest K (P=0.42, and flattest K (P=0.41 were obtained from the IOLMaster after pupillary dilation. However, ACD and IOL power were significantly different postdilation (P<0.01 and P<0.01, respectively. In ACD and IOL power measurements, the concordance rates were 93.03% and 97.05% within 95% limits of agreement (-0.48 to 0.26 mm and -1.09 to 0.88 D, respectively in the Bland–Altman plots. Conclusion: Biometry measurements in the cycloplegic stage should be considered in the IOL formulas that use parameters other than AL and K. Keywords: Haigis

  16. Application of vitreous infusion in Phase Ⅱ suspended intraocular lens implantation%玻璃体灌注在Ⅱ期悬吊式人工晶体植入术中的应用

    Institute of Scientific and Technical Information of China (English)

    谭洪

    2013-01-01

    目的探讨玻璃体灌注在Ⅱ期悬吊式人工晶体植入术中的应用价值.方法对15例(15眼)因各种原因行了玻璃体切除术后无晶体眼,在玻璃体灌注下行Ⅱ期悬吊式人工晶体植入术.术后随访6~24个月,平均(10.3±3.6)个月.结果15例(15眼)均顺利植入悬吊式人工晶体,术中前房及眼压稳定,未发生严重并发症,术后人工晶体正位,无远期严重并发症.结论在玻璃体灌注下,行Ⅱ期悬吊式人工晶体植入术有效、安全,术中眼压及前房稳定,是矫正玻璃体切除术后无晶体眼屈光不正较好的方法.%Objective To discussion the application value on vitreous infusion in phase Ⅱ suspensory intraocular lens implantation. Methods 15 cases ( 15 eyes) for various reasons the aphakic eyes after vitrectomy,in the vitreous infusion phase Ⅱ suspensory intraocular lens implantation.Postoperative follow-up ranged from 6 to 24 months, mean ( 10.3 ±3.6) months. Results: 15 cases (15 eyes ) were successfully implanted suspensory intraocular lens.Intraoperative anterior chamber and intraocular pressure stable, no severe complications, postoperative intraocular lens position, with no long-term complications.Conclusions In the vitreous infusion, phase Ⅱsuspensory intraocular lens implantation is effective, safe, intraoperative intraocular pressure and anterior chamber stability, correct aphakic eyes after vitrectomy ametropia better method.

  17. Simultaneous bilensectomy and endothelial keratoplasty for angle-supported phakic intraocular lens-induced corneal decompensation

    Directory of Open Access Journals (Sweden)

    Vikas Mittal

    2011-01-01

    Full Text Available A 40-year-old lady presented with severe endothelial cell loss in both eyes 14 years after angle-supported phakic intraocular lens (AS PIOL implantation. The left eye had severe corneal edema with bullous keratopathy. The right eye had markedly reduced endothelial cell count (655 cells/mm 2 although the cornea was clear. She underwent simultaneous bilensectomy (AS PIOL explantation and phacoemulsification and Descemet′s stripping and endothelial keratoplasty (DSEK in the left eye. Explanted AS PIOL was identified as ZSAL-4 (Morcher, Stuttgart, Germany model. Corneal edema cleared completely in 2 months with a best corrected visual acuity (-2.25 D sph of 20/60. No intervention was done in the right eye. The present case illustrates that AS PIOL-induced endothelial decompensation can be effectively managed by simultaneous bilensectomy and endothelial keratoplasty.

  18. Haptic Breakage after Transscleral Fixation of a Single-Piece Acrylic Intraocular Lens

    Directory of Open Access Journals (Sweden)

    Hiroki Tanaka

    2014-07-01

    Full Text Available Purpose: To report the case of a patient with a damaged haptic of an acrylic intraocular lens (IOL after transscleral IOL fixation. Methods: This is a retrospective and descriptive case report. Results: A 40-year-old man presented with sudden visual loss in the left eye. He had undergone phacoemulsification/aspiration and IOL implantation 3 years previously and IOL repositioning with transscleral fixation 2 years before the initial visit. His visual acuity was 0.3 in the left eye due to corneal edema caused by a foreign body, i.e., the severed haptic tip of the single-piece acrylic IOL, which was surgically removed. The IOL itself was tilted and therefore explanted. The surface of the tip of the haptic suggested that the monofilament suture thread had exerted continuous force across the haptic. Conclusions: The haptics of acrylic IOLs can be damaged after transscleral fixation.

  19. Morphological Findings of Intraocular Lens with Haptics Detached from Optics Following Cataract Surgery.

    Science.gov (United States)

    Suzuki, Yukihiko; Suzuki, Kaori; Metok, Tomomi; Nakazawai, Mitsuru

    2010-03-09

    A 55-year-old woman was treated using phacoemulsification, aspiration, and intraocular lens (IOL) implantation. Three months after surgery, the optical zone of the anterior capsule was completely closed due to strong capsular contractions. As the two haptics were found to be completely detached from the optics, the IOL was subsequently extracted and morphologically examined. Although the optics and haptics of the IOL when viewed with a stereomicroscope appeared to have no marked damage on their surfaces, an ultra-structural examination showed that a portion of the acrylic optics on the detached surface was defective. We considered that the IOL haptics might have become detached from the optics due to continuous force from postoperative capsular contractions.

  20. Intraocular lens design for treating high myopia based on individual eye model

    Science.gov (United States)

    Wang, Yang; Wang, Zhaoqi; Wang, Yan; Zuo, Tong

    2007-02-01

    In this research, we firstly design the phakic intraocular lens (PIOL) based on individual eye model with optical design software ZEMAX. The individual PIOL is designed to correct the defocus and astigmatism, and then we compare the PIOL power calculated from the individual eye model with that from the experiential formula. Close values of PIOL power are obtained between the individual eye model and the formula, but the suggested method has more accuracy with more functions. The impact of PIOL decentration on human eye is evaluated, including rotation decentration, flat axis decentration, steep axis decentration and axial movement of PIOL, which is impossible with traditional method. To control the PIOL decentration errors, we give the limit values of PIOL decentration for the specific eye in this study.

  1. Corneal injection track: an unusual complication of intraocular lens implantation and review

    Institute of Scientific and Technical Information of China (English)

    Julie; Y.C.Lok; Alvin; L.Young

    2015-01-01

    Phacoemulsification is the main gold standard for cataract operation in the developed world together with foldable intraocular lens(IOL) implantation by injection,allowing for stable wound construction and less postoperative astigmatism. It is a safe procedure with high success rate with the advancement in machines,improvement of IOL injection systems and further maturation of surgeons’ techniques. Despite the large number of operations performed every day, foldable IOL injection leading to an intra-stromal corneal track is a very rare complication. We report a case of this unusual finding in a 70-year-old gentleman who has undergone cataract operation in November 2011 in our hospital and will review on the complications related to foldable IOL injection.

  2. Inadvertent implantation of a reversed-optic Tecnis ZM900 multifocal intraocular lens: case report

    Directory of Open Access Journals (Sweden)

    Wilson Takashi Hida

    2012-12-01

    Full Text Available A 51-year-old woman with age-related cataract had an uneventful phacoemulsification and a Tecnis ZM900 multifocal intraocular lens (IOL implantation in both eyes. During IOL implantation in the left eye, the optic was unintentionally reversed in the bag and left that way. The refraction surprise was not significant and six months postoperatively the corrected distance visual acuity in both eyes was 20/20 and neither complained of visual discomfort. In conclusion, we found that a reversed-optic Tecnis multifocal IOL in the present case resulted in good final visual acuity without significant differences in aberrations compared to the other eye, and a conservative management can be taken as a safe option.

  3. Transconjunctival sutureless intrascleral intraocular lens fixation using intrascleral tunnels guided with catheter and 30-gauge needles.

    Science.gov (United States)

    Takayama, Kohei; Akimoto, Masayuki; Taguchi, Hogara; Nakagawa, Satoko; Hiroi, Kano

    2015-11-01

    We invented a new method for fixing an intraocular lens (IOL) in the scleral tunnel without using a wide conjunctival incision. Modified bent catheter needles were used to penetrate the IOL haptics through the sclerotomy sites. The IOL haptics were inserted into 30-guage (G) scleral tunnels guided by double 30-G needles piercing the sclera. All procedures were performed through the conjunctiva without wide incision. The procedure does not require special forceps, trocars or fibrin glue, only catheter and 30-G needles. The aid of an assistant was not required to support the IOL haptic. The procedures were easily learnt based on our previous method. As with other transconjunctival sutureless surgeries, patients feel less discomfort and the conjunctiva can be conserved for future glaucoma surgery. Complications included two cases of vitreous haemorrhage (16.7%), and one case each of postoperative hypotony, and iris capture (8.3%). Astigmatism induced by intraocular aberration was the same as we reported previously. Our method for fixing the IOL into the scleral tunnel is innovative, less expensive, less invasive and quick. This modified method is a good alternative for fixing IOL haptics into the sclera.

  4. Study on intra-ocular lens aberration measurement in-air

    Science.gov (United States)

    Wang, Yuanyuan; Chen, Jiaojie; Fen, Haihua; Hu, Chuan; Li, Yiyi

    2010-10-01

    In clinical ophthalmology, the wavefront aberration of human eyes is expressed by Zernike polynomial after cataract surgery and intraocular lens implantation, the human eyes aberration will change. The problem of objective evaluation of wavefront aberration introduced by the Intra-ocular (IOL) in-vivo remains unsolved. This paper introduced the measurement principal of IOL wavefront aberration with expression by Zernike polynominal in air. A Hartmann-Shack wavefront sensor system was constructed to measure the wavefront of IOL and to get the corresponding grid patterns. After a series of computer image processing steps, 7th order with 35 items Zernike coefficients was obtained. The IOL of 20.0D power was measured 5 times by this system to get the spherical aberration about 6.73+/-0.02μm, demonstrating the good repeatability of the system. Ten IOLs with the same 20.0D power but difference in surface curvature were chosen for measurement. The spherical aberration observed were in the range of 2.74μm-11.26μm. These results are valuable for the optical design of IOLs and the aberration analysis of human eyes post-operation.

  5. Hydrophilic Acrylic Intraocular Lens Opacification after Descemet Stripping Automated Endothelial Keratoplasty

    Science.gov (United States)

    Norouzpour, Amir; Zarei-Ghanavati, Siamak

    2016-01-01

    Purpose: To report hydrophilic acylic intraocular lens (IOL) opacification after Descemet Stripping Automated Endothelial Keratoplasty (DSAEK) in an eye with multiple prior intraocular surgeries and iatrogenic aniridia. Case Report: A 34-year-old woman with history of penetrating keratoplasty (PKP) for advanced keratoconus and subsequent Urrets-Zavalia Syndrome (UZS) underwent phacoemulsification and hydrophilic acrylic IOL implantation for her cataract. In order to control post-PKP glaucoma, multiple glaucoma surgeries including two glaucoma drainage implants were performed. As the original corneal graft failed, the patient subsequently underwent re-PKP. Four years later, she underwent DSAEK for treatment of the second graft failure. Ten months after DSAEK, a double semi-circular pattern of IOL opacification was observed on the anterior surface of the IOL. The patient did not report any complaints and we decided not to exchange the IOL. Conclusion: In an eye with UZS and iatrogenic aniridia, IOL opacification may result from direct contact between the IOL surface and exogenous air. Aniridia can be a risk factor for development of IOL opacification after DSAEK. Further studies are required to confirm this hypothesis. PMID:27413506

  6. OUTCOME OF PHACOEMULSIFICATION WITH INTRAOCULAR LENS IMPLANTATION IN PATIENTS WITH HIGH MYOPIA

    Directory of Open Access Journals (Sweden)

    Sunil

    2015-11-01

    Full Text Available : OBJECTIVE: To evaluate the visual and refractive outcomes of phacoemulsification with intraocular lens (IOL implantation in highly myopic eyes and to assess the intraoperative and postoperative complications. SETTINGS: Tertiary care Centre Ranchi, India. METHODS: Consecutive patients with high myopia were retrospectively studied for outcomes and complications after phacoemulsification and IOL implantation. RESULTS: The study included 125 eyes of 89 patients (53 females and 36 males with a mean age of 56.01±9.51 years and mean follow-up of 19.45±4.07 months. The mean axial length was 29.58±2.57mm and power of the IOL ranged from −4.00 D to + 17.00 D. The mean preoperative logMAR Best corrected visual acuity (BCVA was 0.82±0.26 which improved to 0.38±0.29 at one month and to 0.43±0.33 at last follow-up, the improvement in vision was statistically significant (P<0.0001, paired t test. Postoperatively, 80 eyes (64% had a BCVA between 0.00 logMAR (20/20 and 0.30 logMAR (20/40. Pre-existing myopic chorioretinal degeneration (13.6% was most common factor causing decreased visual acuity. The mean spherical equivalent at one month postoperative was -0.06±1.28 D. The complications included posterior capsule rupture (5.6%, zonular dehiscence (1.6%, retinal detachment (1.6%, cystoid macular edema (8.8% and posterior capsule opacifications (10.4%. CONCLUSIONS: Phacoemulsification with intraocular lens implantation is a safe and effective procedure to improve patients visual acuity in those with high myopia.

  7. Intraocular pressure measurement over soft contact lens by rebound tonometer: a comparative study

    Institute of Scientific and Technical Information of China (English)

    Senay; Asik; Nacaroglu; Emine; Seker; Un; Mehmet; Giray; Ersoz; Yelda; Tasci

    2015-01-01

    AIM: To evaluate the intraocular pressure(IOP)measurements by Icare rebound tonometer over a contact lens in comparison with Goldmann applanation tonometry(GAT). METHODS: Fifty patients using contact lens were included in this study. One of the eyes of the patients was selected randomly and their IOP were measured by rebound tonometer with and without contact lens(RTCL,RT respectively) and by GAT, as well as their central corneal thickness(CCT) by optical pachymeter. The results of both methods were compared by correlation analysis, general linear method repeated measure and Bland-Altman analysis.RESULTS: Mean IOP values measured by RTCL, RT and GAT were 15.68 ±3.7, 14.50 ±3.4 and 14.16 ±2.8(P <0.001), respectively. Mean IOP by RTCL was significantly higher than the measurements implemented by RT and GAT(P <0.001), while there was no difference between the measurements by GAT and RT(P =0.629). There was a good level of positive correlation between GAT and RTCL as well as RT(r =0.786 P <0.001, r =0.833 P <0.001, respectively). We have observed that CCT increase did not show any correlation with the differences of the measurements between RTCL and RT(P =0.329), RTCL and GAT(P =0.07) as well as RT and GAT(P =0.189) in linear regression model.CONCLUSION: The average of the measurements over contact lens by rebound tonometer was found to be higher than what was measured by GAT. Although this difference is statistically significant, it may be clinically negligible in the normal population.

  8. Facoemulsificação, vitrectomia via pars plana e implante de lente intra-ocular em olhos com retinopatia diabética proliferativa Phacoemulsification, pars plana vitrectomy and intraocular lens implant in eyes with proliferative diabetic retinopathy

    Directory of Open Access Journals (Sweden)

    Armando Belfort Mattos

    2004-06-01

    realizar a vitrectomia via pars plana, ao invés de se realizar uma segunda cirurgia, que seria somente para a remoção da catarata após a vitrectomia pars plana, é técnica segura e capaz de promover a melhora da acuidade visual além de ser menos agressiva para o paciente. O potencial para melhora da acuidade visual final é limitado pela gravidade da retinopatia diabética.PURPOSE: To evaluate the outcomes and the best technique for a combined phacoemulsification (PHACO, pars plana vitrectomy (PPV and posterior chamber intraocular lens insertion (PCIOL in one single procedure for patients with proliferative diabetic retinopathy. METHODS: We reviewed charts of 47 (53 eyes patients with proliferative diabetic retinopathy who underwent combined phacoemulsification with posterior chamber intraocular lens implant and pars plana vitrectomy performed between January 1991 and September 1998 at the Bascom Palmer Eye Institute, eye hospital affiliated with the University of Miami. The study was done in conjunction with the Federal University of São Paulo. A total of 43 eyes from 40 patients were elected to participate in the study. RESULTS: The follow-up range was three to 60 months (mean 20 months. The age ranged from 37 to 77 years with a mean of 59. Preoperative visual acuity improved two lines or more in 26 (60.4% eyes, remained the same in 9 (20.9% and got worse in 8 (18.6%. In 10 (23.2% eyes visual acuity improved to 20/40. The study showed to be statistically significant for the improvement of the final visual acuity. Recurrent vitreous hemorrhage was the most frequent postoperative complication found in 12 (27.9% eyes and it was followed by transient anterior chamber reaction in 9 (20.9% eyes. Intraoperative and postoperative complications related to phacoemulsification were rare. IOL capture was found in 2 (4.6% eyes and intraocular lens subluxation in 1 (2.3% eye. CONCLUSION: Combined phacoemulsification with posterior chamber intraocular lens implant and pars plana

  9. Treatment of dystrophic calcification on a silicone intraocular lens with pars plana vitrectomy

    Directory of Open Access Journals (Sweden)

    Mehta N

    2014-07-01

    Full Text Available Nitish Mehta,1 Roger A Goldberg,2 Chirag P Shah21University of Massachusetts Medical School, Worcester, MA, USA; 2Department of Retina, Ophthalmic Consultants of Boston, Boston, Massachusetts, USAPurpose: Dense, vision-obscuring calcification on the posterior aspect of silicone intraocular lenses (IOLs is often not amenable to neodymium:yttrium-aluminum-garnet capsulotomy, and, in prior reports, has required IOL exchange. We report the successful removal of dense calcium deposition on the posterior surface of a three-piece silicone lens using pars plana vitrectomy (PPV.Materials and methods: A 23-gauge PPV was performed using the Stellaris® vitrectomy system. A light pipe was used to retroilluminate the IOL, and a dense fibrous tissue setting with a low cut-rate and high aspiration rate was able to clear the visual axis of the dystrophic calcification without damaging the IOL optic.Results: Visual acuity improved from 20/100 to 20/25.Conclusion: Small-gauge PPV may be utilized to remove dense dystrophic calcium deposits on the lens surface in lieu of IOL exchange. Keywords: cataract surgery, technique, Nd:YAG capsulotomy, IOL exchange

  10. Preoperative automatic visual behavioural analysis as a tool for intraocular lens choice in cataract surgery

    Directory of Open Access Journals (Sweden)

    Heloisa Neumann Nogueira

    2015-04-01

    Full Text Available Purpose: Cataract is the main cause of blindness, affecting 18 million people worldwide, with the highest incidence in the population above 50 years of age. Low visual acuity caused by cataract may have a negative impact on patient quality of life. The current treatment is surgery in order to replace the natural lens with an artificial intraocular lens (IOL, which can be mono- or multifocal. However, due to potential side effects, IOLs must be carefully chosen to ensure higher patient satisfaction. Thus, studies on the visual behavior of these patients may be an important tool to determine the best type of IOL implantation. This study proposed an anamnestic add-on for optimizing the choice of IOL. Methods: We used a camera that automatically takes pictures, documenting the patient’s visual routine in order to obtain additional information about the frequency of distant, intermediate, and near sights. Results: The results indicated an estimated frequency percentage, suggesting that visual analysis of routine photographic records of a patient with cataract may be useful for understanding behavioural gaze and for choosing visual management strategy after cataract surgery, simultaneously stimulating interest for customized IOL manufacturing according to individual needs.

  11. Early clinical experience with a new preloaded one-piece intraocular lens in paediatric cataract surgery.

    Science.gov (United States)

    Gosling, D B; Chan, T K J

    2016-09-01

    PurposeTo report the clinical experience of using the Tecnis PCB00 (Abbott Medical Optics, Santa Ana, CA, USA) preloaded one-piece intraocular lens (IOL) in the setting of a tertiary referral centre for paediatric cataract.MethodsA retrospective case note review of all paediatric cataract surgeries using the Tecnis PCB00 IOL, at a single UK paediatric ophthalmology department.ResultsNine eyes in seven patients received the IOL between December 2014 and January 2016. All patients underwent lens aspiration and insertion of the IOL 'in the bag.' The indications for surgery included developmental cataract (8/9) and traumatic cataract (1/9). Mean age at the time of surgery was 7 years (range 2-14). The median improvement in logMAR best-corrected visual acuity was 0.475 (range 0.250-1.500). The mean follow-up duration was 5 months (range 1-13). No operative or post-operative complications occurred as a result of using the device.ConclusionThe Tecnis PCB00 preloaded IOL appears to be a safe and effective device in treating paediatric cataract.

  12. Intraocular lens alignment from an en face optical coherence tomography image Purkinje-like method

    Science.gov (United States)

    Sun, Mengchan; de Castro, Alberto; Ortiz, Sergio; Perez-Merino, Pablo; Birkenfeld, Judith; Marcos, Susana

    2014-06-01

    Measurement of intraocular lens (IOL) alignment implanted in patients in cataract surgery is important to understand their optical performance. We present a method to estimate tilt and decentration of IOLs based on optical coherence tomography (OCT) images. En face OCT images show Purkinje-like images that correspond to the specular reflections from the corneal and IOL surfaces. Unlike in standard Purkinje-imaging, the tomographic nature of OCT allows unequivocal association of the reflection with the corresponding surface. The locations of the Purkinje-like images are linear combinations of IOL tilt, IOL decentration, and eye rotation. The weighting coefficients depend on the individual anterior segment geometry, obtained from the same OCT datasets. The methodology was demonstrated on an artificial model eye with set amounts of lens tilt and decentration and five pseudophakic eyes. Measured tilt and decentration in the artificial eye differed by 3.7% and 0.9%, respectively, from nominal values. In patients, average IOL tilt and decentration from Purkinje were 3.30±4.68 deg and 0.16±0.16 mm, respectively, and differed on average by 0.5 deg and 0.09 mm, respectively, from direct measurements on distortion-corrected OCT images. Purkinje-based methodology from anterior segment en face OCT imaging provided, therefore, reliable measurements of IOL tilt and decentration.

  13. Visual and Refractive Outcomes of a Toric Presbyopia-Correcting Intraocular Lens

    Science.gov (United States)

    Epitropoulos, Alice T.

    2016-01-01

    Purpose. To evaluate outcomes in astigmatic patients implanted with the Trulign (Bausch + Lomb) toric presbyopia-correcting intraocular lens (IOL) during cataract surgery in a clinical practice setting. Methods. Retrospective study in 40 eyes (31 patients) that underwent cataract extraction and IOL implantation in a procedure using intraoperative wavefront aberrometry guidance (ORA system). Endpoints included uncorrected visual acuity (VA), reduction in refractive cylinder, accuracy to target, axis orientation, and safety. Results. At postoperative month 1, refractive cylinder was ≤0.50 D in 97.5% of eyes (≤1.00 D in 100%), uncorrected distance VA was 20/25 or better in 95%, uncorrected intermediate VA was 20/25 or better in 95%, and uncorrected near VA was 20/40 (J3 equivalent) or better in 92.5%. Manifest refraction spherical equivalent was within 1.00 D of target in 95% of eyes and within 0.50 D in 82.5%. Lens rotation was <5° and best-corrected VA was 20/25 or better in all eyes. Conclusion. The IOL effectively reduced refractive cylinder and provided excellent uncorrected distance and intermediate vision and functional near vision. Refractive predictability and rotational stability were exceptional. Implantation of this toric presbyopia-correcting IOL using ORA intraoperative aberrometry provides excellent refractive and visual outcomes in a standard of care setting. PMID:26885382

  14. Associated depression in pseudophakic patients with intraocular lens with and without chromophore

    Directory of Open Access Journals (Sweden)

    Mendoza-Mendieta ME

    2016-03-01

    Full Text Available María Elena Mendoza-Mendieta, Ana Aurora Lorenzo-Mejía Association to Prevent Blindness in Mexico (APEC, Hospital “Dr Luis Sánchez Bulnes”, Mexico City, Mexico Background: With aging, the crystalline lens turns yellowish, which increases the absorption of wavelengths in the blue electromagnetic spectrum, reducing their photoreception in the retina. Since these wavelengths are the main stimulus in the regulation of the circadian rhythm, progressive reduction in their transmission is associated with chronic sleep disturbances and depression in elderly patients. Cataract extraction improves circadian photoreception at any age. However, lenses that block blue waves have 27% to 38% less melatonin suppression than lenses that block only ultraviolet (UV rays. Purpose: To assess the depression symptoms in subjects who have had bilateral phacoemulsification and intraocular lens (IOL implants, one group with yellow chromophore IOLs and the other group with transparent IOLs were compared. Setting: Association to Prevent Blindness in Mexico (APEC, Hospital “Dr Luis Sánchez Bulnes”. Design: This was an observational, cross-sectional, and single-center study. Materials and methods: Twenty-six subjects between 60 and 80 years of age, with a history of bilateral phacoemulsification and placement of the same type of IOL in both eyes from 4 to 12 months prior to the study, who attended the follow-up visits and agreed to participate in this study, and provided signed informed consent were included in the study. They were asked to answer the short version of the 15-item Geriatric Depression Scale. Results: The average age of the study participants was 72.5±5.94 years. The group without chromophore included 46.1% (n=12 of the patients and the group with chromophore included 53.9% (n=14 of the patients (P=0.088. Conclusion: In the group of patients with IOLs that block the passage of blue light, the depression rate was 21.4%, a rate similar to that

  15. Effect of altered eating habits and periods during Ramadan fasting on intraocular pressure, tear secretion, corneal and anterior chamber parameters

    NARCIS (Netherlands)

    Kerimoglu, H.; Ozturk, B.; Gunduz, K.; Bozkurt, B.; Kamis, U.; Okka, M.

    2010-01-01

    Purpose To determine whether altered eating habits and periods, especially the pre-dawn meal, during Ramadan fasting have any significant effect on intraocular pressure (IOP), tear secretion, corneal and anterior chamber parameters. Methods IOP, basal tear secretion (BTS), reflex tear secretion (RTS

  16. Small-aperture corneal inlay in presbyopic patients with prior phakic intraocular lens implantation surgery: 3-month results

    Directory of Open Access Journals (Sweden)

    Huseynova T

    2013-08-01

    Full Text Available Tukezban Huseynova,1 Tomomi Kanamori,1 George O Waring IV,2 Minoru Tomita1,3,4 1Shinagawa LASIK Center, Tokyo, Japan; 2Medical University of South Carolina, Charleston, SC, USA; 3Wenzhou Medical College, Wenzhou, People’s Republic of China; 4Eye Can Cataract Surgery Center, Metro Manila, Philippines Abstract: We report a series of three case reports of KAMRA inlay implantation procedures in presbyopic patients with a history of prior phakic intraocular lens implantation surgery. Three-month results showed a two to five-line improvement for uncorrected near visual acuity. The absolute uncorrected near visual acuity change for case 1 was from J4 to J2, for case 2 was from J6 to J4, and for case 3 was from J10 to J5. No significant change of uncorrected distance visual acuity was observed in all three cases. Keywords: phakic intraocular lens, IOL, KAMRA, intracorneal inlay

  17. The Management of a Patient with Elevated Intraocular Pressure Resistant to Medical Treatment: Anterior Chamber Irrigation

    Directory of Open Access Journals (Sweden)

    Abdullah Beyoğlu

    2014-10-01

    Full Text Available A 7-year-old male patient was medically treated in another center for hyphema which occurred after blunt trauma to his right eye. He was admitted to our clinic when his visual acuity decreased after being discharged. Biomicroscopic examination revealed total hyphema. Intraocular pressure (IOP was 48 mm Hg in the right eye with Goldmann applanation tonometry. Since IOP could not be managed by medical therapy and there was no regression in hyphema, anterior chamber was irrigated. As in our case, it should not be forgotten that re-hemorrhage may occur in the first week of hyphema during childhood. Moreover, surgical treatment should be considered when hemorrhage does not regress with medical treatment, increased IOP persists, and when there is a risk of corneal endothelial staining (corneal blood staining. (Turk J Ophthalmol 2014; 44: 400-2

  18. Location and composition of haptics of posterior chamber intraocular lenses. Histopathologic study of postmortem eyes.

    Science.gov (United States)

    McDonnell, P J; Champion, R; Green, W R

    1987-02-01

    Of 110 eyes with posterior chamber intraocular lenses (IOLs) examined postmortem, 37% had both haptics outside of the capsular bag; 57% had one haptic in the capsular bag and the other haptic outside of the bag. Typically, these optics were decentered by 1 to 2 mm. Only six eyes (5%) had both haptics within the capsular bag. Erosion into the ciliary sulcus produced obliteration of the major arterial circle of the iris in 12 eyes (11%). The local tissue response to eroding haptics was similar for haptics composed of polypropylene and haptics composed of polymethylmethacrylate (PMMA). The authors found considerable discrepancy between the actual location of haptics and the surgeon's desired location (i.e., capsular bag or ciliary sulcus). Most of these cases were clinically successful.

  19. Long-term visual outcomes after Crystalens® HD intraocular lens implantation

    Directory of Open Access Journals (Sweden)

    Karavitaki AE

    2014-05-01

    Full Text Available Alexandra E Karavitaki, Ioannis G Pallikaris, Sophia I Panagopoulou, George A Kounis, George Kontadakis, George D KymionisInstitute of Vision and Optics, University of Crete, Crete, GreecePurpose: Our purpose was to evaluate the long-term visual outcomes after bilateral implantation of Crystalens® HD (Bausch and Lomb, Inc. accommodative intraocular lenses.Methods: In this study, 25 patients (50 eyes who underwent cataract surgery and bilateral Crystalens HD accommodative intraocular lens implantation were included. The Crystalens HD lens was implanted in the bag in both eyes, without any intra- or postoperative complications. The visual parameters measured before and after surgery were: uncorrected distance visual acuity, corrected distance visual acuity (CDVA (using the Early Diabetic Retinopathy Study [EDTRS] logMAR charts, uncorrected intermediate visual acuity, and uncorrected near visual acuity using a Birkhäuser reading chart, at a distance of 66 cm and 33 cm for intermediate and near vision, respectively, directly illuminated by a lamp of 60 watts. After surgery, the patients were evaluated at 1, 3, 6, 12, 24, and 36 months.Results: The mean age was 68.70±7.1 (range: 54 to 83 years. The mean follow-up was 42.72±0.49 (range: 42.33 to 43.27 months. The uncorrected distance visual acuity improved from 0.56±0.41 (range: 0 to 2 preoperatively to 0.19±0.13 (range: 0 to 0.38 (logMAR scale at the last follow-up visit, and the CDVA improved from 0.17±0.18 (range: 0 to 0.7 preoperatively to 0.05±0.05 (range: −0.02 to 0.22 at the last follow-up visit. No eyes lost lines of CDVA during the follow-up period, while 54% of patients gained one or more lines of CDVA. The uncorrected intermediate and near visual acuity was J2 or better in 71% and 69% of our patients, respectively.Conclusion: Crystalens HD implantation seems to provide an improvement in visual acuity for far, intermediate, and near distances.Keywords: presbyopia, accommodation

  20. Capsular Outcomes After Pediatric Cataract Surgery Without Intraocular Lens Implantation: Qualitative Classification and Quantitative Measurement.

    Science.gov (United States)

    Tan, Xuhua; Lin, Haotian; Lin, Zhuoling; Chen, Jingjing; Tang, Xiangchen; Luo, Lixia; Chen, Weirong; Liu, Yizhi

    2016-03-01

    The objective of this study was to investigate capsular outcomes 12 months after pediatric cataract surgery without intraocular lens implantation via qualitative classification and quantitative measurement.This study is a cross-sectional study that was approved by the institutional review board of Zhongshan Ophthalmic Center of Sun Yat-sen University in Guangzhou, China.Digital coaxial retro-illumination photographs of 329 aphakic pediatric eyes were obtained 12 months after pediatric cataract surgery without intraocular lens implantation. Capsule digital coaxial retro-illumination photographs were divided as follows: anterior capsule opening area (ACOA), posterior capsule opening area (PCOA), and posterior capsule opening opacity (PCOO). Capsular outcomes were qualitatively classified into 3 types based on the PCOO: Type I-capsule with mild opacification but no invasion into the capsule opening; Type II-capsule with moderate opacification accompanied by contraction of the ACOA and invasion to the occluding part of the PCOA; and Type III-capsule with severe opacification accompanied by total occlusion of the PCOA. Software was developed to quantitatively measure the ACOA, PCOA, and PCOO using standardized DCRPs. The relationships between the accurate intraoperative anterior and posterior capsulorhexis sizes and the qualitative capsular types were statistically analyzed.The DCRPs of 315 aphakic eyes (95.8%) of 191 children were included. Capsular outcomes were classified into 3 types: Type I-120 eyes (38.1%); Type II-157 eyes (49.8%); Type III-38 eyes (12.1%). The scores of the capsular outcomes were negatively correlated with intraoperative anterior capsulorhexis size (R = -0.572, P < 0.001), but no significant correlation with intraoperative posterior capsulorhexis size (R = -0.16, P = 0.122) was observed. The ACOA significantly decreased from Type I to Type II to Type III, the PCOA increased in size from Type I to Type II, and the PCOO increased

  1. Extended depth of focus intra-ocular lens: a solution for presbyopia and astigmatism

    Science.gov (United States)

    Zlotnik, Alex; Raveh, Ido; Ben Yaish, Shai; Yehezkel, Oren; Belkin, Michael; Zalevsky, Zeev

    2010-02-01

    Purpose: Subjects after cataract removal and intra-ocular lens (IOL) implantation lose their accommodation capability and are left with a monofocal visual system. The IOL refraction and the precision of the surgery determine the focal distance and amount of astigmatic aberrations. We present a design, simulations and experimental bench testing of a novel, non-diffractive, non-multifocal, extended depth of focus (EDOF) technology incorporated into an IOL that allows the subject to have astigmatic and chromatic aberrations-free continuous focusing ability from 35cm to infinity as well as increased tolerance to IOL decentration. Methods: The EDOF element was engraved on a surface of a monofocal rigid IOL as a series of shallow (less than one micron deep) concentric grooves around the optical axis. These grooves create an interference pattern extending the focus from a point to a length of about one mm providing a depth of focus of 3.00D (D stands for Diopters) with negligible loss of energy at any point of the focus while significantly reducing the astigmatic aberration of the eye and that generated during the IOL implantation. The EDOF IOL was tested on an optical bench simulating the eye model. In the experimental testing we have explored the characteristics of the obtained EDOF capability, the tolerance to astigmatic aberrations and decentration. Results: The performance of the proposed IOL was tested for pupil diameters of 2 to 5mm and for various spectral illuminations. The MTF charts demonstrate uniform performance of the lens for up to 3.00D at various illumination wavelengths and pupil diameters while preserving a continuous contrast of above 25% for spatial frequencies of up to 25 cycles/mm. Capability of correcting astigmatism of up to 1.00D was measured. Conclusions: The proposed EDOF IOL technology was tested by numerical simulations as well as experimentally characterized on an optical bench. The new lens is capable of solving presbyopia and astigmatism

  2. AN EXPERIMENTAL STUDY OF THE TUMOUR NECROSIS FACTOR LEVELS IN AQUEOUS HUMOR AFTER TRAUMATIC CATARACT AND INTRAOCULAR LENS IMPLANTATION

    Institute of Scientific and Technical Information of China (English)

    1999-01-01

    Purpose. This paper studies the tumour necrosis factor (TNF) levels in aqueous humor after traumatic cataract extraction and posterior chamber (PC) intraocular lens (IOL) implantation in rabbits,and discusses the effect of TNF on postoperative anterior ocular inflammation.Methods. Twenty-seven pigmented rabbits were divided into three groups: for the first group, the IOL were placed in the capsular bag after traumatic cataract extraction; for the second, the Extracapsular cataract extraction without IOL implantation; and for the third, the control group without surgical intervention. On the 1st, 3rd, 7th and 14th day postoperatively, aqueous humor samples were obtained. A modified double antibodies indirect sandwich ELISA was used to detected for the presence of TNF. The data were studied by means of analysis of variance in SAS software.Result. The TNF level was increased in aqueous humor and reached its maximum on the 1st postoperative days after traumatic cataract extraction and PC IOLs implantation, and the TNF levels are significantly higher (P<0.05) on the 1st, 3rd, 7th and 14th day postoperatively in traumatic cataract extraction and PC IOL implanted group than that in the non-surgical-intervention group and extracapsular cataract extraction group.Conclusions. The increase of TNF levels had a close relationship with presence of the IOL itself which induces the secretion of TNF. This suggested that TNF as the principal mediators of immunological and inflammatory responses, so that may play critical role in anterior ocular inflammative response after traumatic cataract extraction and IOL implantation.

  3. Evaluation and Comparison of Contrast Sensitivity in Patients with Zaraccom Ultraflex or F260 Intraocular Lens Inserted

    Directory of Open Access Journals (Sweden)

    Bahad›r Çetin

    2011-08-01

    Full Text Available Purpose: In this study, we evaluated the optic performance of Zaraccom UF intraocular lens (IOL by comparing the contrast sensitivity of IOLs in photopic and mesopic lighting conditions in patients who were operated for cataract and inserted Zaraccom Ultraflex (UF or Zaraccom F260 (F260 IOL. Methods: In this prospective study, we included 60 eyes of 60 patients (Group 1: 30 patients UF, Group 2: 30 patients F260 who had undergone phacoemulsification with implantation of IOL in the posterior chamber between 2009 and 2010 in Ophthalmology Department at Cumhuriyet University. The patients were examined routinely at the 1. day, 1. week and 1. month postoperatively. At the third month, the best-corrected visual acuity values were recorded; then,, the contrast sensitivity tests at 1.5, 3, 6, 12 and 18 cpd were examined in all patients in all frequencies in photopic (with and without glare and mesopic (with and without glare lighting conditions. Results: When comparing the contrast sensitivity results in the two groups, we found that UF group’s values were higher in all spatial frequencies (1.5, 3, 6, 12 and 18 cpd. The results were statistically significantly greater for the test frequencies of mesopic without glare 1.5 (p=0.016 and 18 (p=0.005 cpd, mesopic with glare 6 (p=0.002 cpd, photopic without glare 1.5 (p=0.01, 3 (p=0.04, 6 (p=0.001 and 12 (p=0.001 cpd, photopic with glare 6 (p=0.01 and 12 (p=0.02 cpd (p<0.05. Conclusion: These results show that both IOLs provide good level of contrast sensitivity, but better visual perception is achieved with UF IOL. We think that the High Modulation Transfer Function (MTF value of the UF IOL is an important factor for the obtained results. (Turk J Ophthalmol 2011; 41: 230-5

  4. Effect of pupillary dilation on Haigis formula-calculated intraocular lens power measurement by using optical biometry

    Science.gov (United States)

    Khambhiphant, Bharkbhum; Sasiwilasagorn, Suganlaya; Chatbunchachai, Nattida; Pongpirul, Krit

    2016-01-01

    Purpose The purpose of this study was to evaluate the effect of pupillary dilation on the Haigis formula-calculated intraocular lens (IOL) power and ocular biometry measurements by using IOLMaster®. Methods A prospective study was performed for biometry measurements of 373 eyes of 192 healthy subjects using the IOLMaster at the outpatient department of King Chulalongkorn Memorial Hospital from February 2013 to July 2013. The axial length (AL), anterior chamber depth (ACD), keratometry (K), and IOL power were measured before and after 1% tropicamide eye drop instillation. The Haigis formula was used in the IOL power calculation with the predicted target to emmetropia. Each parameter was compared by a paired t-test prior to and after pupillary dilation. Bland–Altman plots were also used to determine the agreement between each parameter. Results The mean age of the subjects was 53.74±14.41 years (range 18–93 years). No differences in AL (P=0.03), steepest K (P=0.42), and flattest K (P=0.41) were obtained from the IOLMaster after pupillary dilation. However, ACD and IOL power were significantly different postdilation (P<0.01 and P<0.01, respectively). In ACD and IOL power measurements, the concordance rates were 93.03% and 97.05% within 95% limits of agreement (−0.48 to 0.26 mm and −1.09 to 0.88 D, respectively) in the Bland–Altman plots. Conclusion Biometry measurements in the cycloplegic stage should be considered in the IOL formulas that use parameters other than AL and K. PMID:27555746

  5. Associated depression in pseudophakic patients with intraocular lens with and without chromophore

    Science.gov (United States)

    Mendoza-Mendieta, María Elena; Lorenzo-Mejía, Ana Aurora

    2016-01-01

    Background With aging, the crystalline lens turns yellowish, which increases the absorption of wavelengths in the blue electromagnetic spectrum, reducing their photoreception in the retina. Since these wavelengths are the main stimulus in the regulation of the circadian rhythm, progressive reduction in their transmission is associated with chronic sleep disturbances and depression in elderly patients. Cataract extraction improves circadian photoreception at any age. However, lenses that block blue waves have 27% to 38% less melatonin suppression than lenses that block only ultraviolet (UV) rays. Purpose To assess the depression symptoms in subjects who have had bilateral phacoemul-sification and intraocular lens (IOL) implants, one group with yellow chromophore IOLs and the other group with transparent IOLs were compared. Setting Association to Prevent Blindness in Mexico (APEC), Hospital “Dr Luis Sánchez Bulnes”. Design This was an observational, cross-sectional, and single-center study. Materials and methods Twenty-six subjects between 60 and 80 years of age, with a history of bilateral phacoemulsification and placement of the same type of IOL in both eyes from 4 to 12 months prior to the study, who attended the follow-up visits and agreed to participate in this study, and provided signed informed consent were included in the study. They were asked to answer the short version of the 15-item Geriatric Depression Scale. Results The average age of the study participants was 72.5±5.94 years. The group without chromophore included 46.1% (n=12) of the patients and the group with chromophore included 53.9% (n=14) of the patients (P=0.088). Conclusion In the group of patients with IOLs that block the passage of blue light, the depression rate was 21.4%, a rate similar to that observed in the elderly population, whereas no patients in the group with transparent IOLs had depression. PMID:27099465

  6. Comparison of shape recovery ratios of single-piece poly(methyl methacrylate) intraocular lens haptics.

    Science.gov (United States)

    Kimura, W; Kimura, T; Sawada, T; Kikuchi, T; Nagai, H; Yamada, Y

    1993-09-01

    We studied shape recovery ratios of several single- and three-piece intraocular lens (IOL) haptics after conducting compression tests for various lengths of time. Results of the comparison of poly(methyl methacrylate) (PMMA) IOL haptics configured of a single piece and of three pieces showed a superior shape recovery ratio for single-piece haptics. Comparisons of the shape recovery ratios among single-piece PMMA haptics and conventional three-piece haptics made of polyvinylidene fluoride (PVDF), PMMA, and polypropylene (PP) revealed that the shape recovery ratio of single-piece PMMA haptics was higher than the ratios of the conventional three-piece PMMA and PP haptics. The ratios of two of three of the single-piece PMMA haptics, however, were lower than the ratios of three-piece PVDF haptics. The form and manufacturing procedures of haptics likely have a significant impact on the shape recovery ratio of haptics, even those made of the same material. Since decentration after IOL surgery could be caused by the condition of the patient's lenticular capsule and Zinn's zonule, it is difficult to conclude that the shape recovery ratio is the only factor in IOL stability. Nevertheless, this study indicates that IOL haptics that cause less decentration and have better mechanical properties should be developed.

  7. The Application of a Contact Lens Sensor in Detecting 24-Hour Intraocular Pressure-Related Patterns

    Science.gov (United States)

    2016-01-01

    Glaucoma is one of the leading causes of blindness worldwide. Recent studies suggest that intraocular pressure (IOP) fluctuations, peaks, and rhythm are important factors in disease advancement. Yet, current glaucoma management remains hinged on single IOP measurements during clinic hours. To overcome this limitation, 24-hour IOP monitoring devices have been employed and include self-tonometry, permanent IOP, and temporary IOP monitoring. This review discusses each IOP measuring strategy and focuses on the recently FDA-approved contact lens sensor (CLS). The CLS records IOP-related ocular patterns for 24 hours continuously. Using the CLS, IOP-related parameters have been found to be associated with the rate of visual field progression in primary open-angle glaucoma, disease progression in primary angle-closure glaucoma, and various clinical variables in ocular hypertension. The CLS has been used to quantify blink rate and limbal strain and measure the circadian rhythm in a variety of disease states including normal-tension glaucoma and thyroid eye disease. The effects of various IOP-lowering interventions were also characterized using the CLS. CLS provides a unique, safe, and well-tolerated way to study IOP-related patterns in a wide range of disease states. IOP-related patterns may help identify patients most at risk for disease progression and assist with the development of tailored treatments. PMID:27525110

  8. Accuracy of Intraocular Lens Power Calculation Formulas for Highly Myopic Eyes

    Science.gov (United States)

    Zhang, Yichi; Liang, Xiao Ying; Liu, Shu; Lee, Jacky W. Y.; Bhaskar, Srinivasan; Lam, Dennis S. C.

    2016-01-01

    Purpose. To evaluate and compare the accuracy of different intraocular lens (IOL) power calculation formulas for eyes with an axial length (AL) greater than 26.00 mm. Methods. This study reviewed 407 eyes of 219 patients with AL longer than 26.0 mm. The refractive prediction errors of IOL power calculation formulas (SRK/T, Haigis, Holladay, Hoffer Q, and Barrett Universal II) using User Group for Laser Interference Biometry (ULIB) constants were evaluated and compared. Results. One hundred seventy-one eyes were enrolled. The Barrett Universal II formula had the lowest mean absolute error (MAE) and SRK/T and Haigis had similar MAE, and the statistical highest MAE were seen with the Holladay and Hoffer Q formulas. The interquartile range of the Barrett Universal II formula was also the lowest among all the formulas. The Barrett Universal II formulas yielded the highest percentage of eyes within ±1.0 D and ±0.5 D of the target refraction in this study (97.24% and 79.56%, resp.). Conclusions. Barrett Universal II formula produced the lowest predictive error and the least variable predictive error compared with the SRK/T, Haigis, Holladay, and Hoffer Q formulas. For high myopic eyes, the Barrett Universal II formula may be a more suitable choice. PMID:27119018

  9. Toric Intraocular Lens Implantation for Correction of Astigmatism in Cataract Patients with Corneal Ectasia

    Directory of Open Access Journals (Sweden)

    Efstratios A. Parikakis

    2013-11-01

    Full Text Available Our purpose was to examine the long-term efficacy of toric intraocular lens (IOL implantation in cataract patients with high astigmatism due to corneal ectasia, who underwent phacoemulsification cataract surgery. Five eyes of 3 cataract patients with topographically stable keratoconus or pellucid macular degeneration (PMD, in which phacoemulsification with toric IOL implantation was used to correct high astigmatism, are reported. Objective and subjective refraction, visual acuity measurement and corneal topography were performed in all cases before and after cataract surgery. In all cases, there was a significant improvement in visual acuity, as well as refraction, which remained stable over time. Specifically, in subjective refraction, all patients achieved visual acuity from 7/10 to 9/10 with up to -2.50 cyl. Corneal topography also remained stable. Postoperative follow-up was 18-28 months. Cataract surgery with toric IOL implantation seems to be safe and effective in correcting astigmatism and improving visual function in cataract patients with topographically stable keratoconus or PMD.

  10. Clinical Outcomes after Binocular Implantation of a New Trifocal Diffractive Intraocular Lens

    Directory of Open Access Journals (Sweden)

    Florian T. A. Kretz

    2015-01-01

    Full Text Available Purpose. To evaluate visual, refractive, and contrast sensitivity outcomes, as well as the incidence of pseudophakic photic phenomena and patient satisfaction after bilateral diffractive trifocal intraocular lens (IOL implantation. Methods. This prospective nonrandomized study included consecutive patients undergoing cataract surgery with bilateral implantation of a diffractive trifocal IOL (AT LISA tri 839MP, Carl Zeiss Meditec. Distance, intermediate, and near visual outcomes were evaluated as well as the defocus curve and the refractive outcomes 3 months after surgery. Photopic and mesopic contrast sensitivity, patient satisfaction, and halo perception were also evaluated. Results. Seventy-six eyes of 38 patients were included; 90% of eyes showed a spherical equivalent within ±0.50 diopters 3 months after surgery. All patients had a binocular uncorrected distance visual acuity of 0.00 LogMAR or better and a binocular uncorrected intermediate visual acuity of 0.10 LogMAR or better, 3 months after surgery. Furthermore, 85% of patients achieved a binocular uncorrected near visual acuity of 0.10 LogMAR or better. Conclusions. Trifocal diffractive IOL implantation seems to provide an effective restoration of visual function for far, intermediate, and near distances, providing high levels of visual quality and patient satisfaction.

  11. Accuracy of Intraocular Lens Power Calculation Formulas for Highly Myopic Eyes

    Directory of Open Access Journals (Sweden)

    Yichi Zhang

    2016-01-01

    Full Text Available Purpose. To evaluate and compare the accuracy of different intraocular lens (IOL power calculation formulas for eyes with an axial length (AL greater than 26.00 mm. Methods. This study reviewed 407 eyes of 219 patients with AL longer than 26.0 mm. The refractive prediction errors of IOL power calculation formulas (SRK/T, Haigis, Holladay, Hoffer Q, and Barrett Universal II using User Group for Laser Interference Biometry (ULIB constants were evaluated and compared. Results. One hundred seventy-one eyes were enrolled. The Barrett Universal II formula had the lowest mean absolute error (MAE and SRK/T and Haigis had similar MAE, and the statistical highest MAE were seen with the Holladay and Hoffer Q formulas. The interquartile range of the Barrett Universal II formula was also the lowest among all the formulas. The Barrett Universal II formulas yielded the highest percentage of eyes within ±1.0 D and ±0.5 D of the target refraction in this study (97.24% and 79.56%, resp.. Conclusions. Barrett Universal II formula produced the lowest predictive error and the least variable predictive error compared with the SRK/T, Haigis, Holladay, and Hoffer Q formulas. For high myopic eyes, the Barrett Universal II formula may be a more suitable choice.

  12. Influence of aspheric intraocular lens on frequency doubling technology and contrast sensitivity: a fellow eye study

    Directory of Open Access Journals (Sweden)

    Rodrigo França de Espíndola

    2014-12-01

    Full Text Available Purpose: To evaluate whether implantation of an aspheric intraocular lens (IOL results in reduced ocular aberrations and improved contrast sensitivity after cataract surgery and, therefore, changes on frequency-doubling technology (FDT testing. Methods: The present prospective clinical study enrolled 25 patients with bilateral cataract (50 eyes, who randomly received either an aspheric (Akreos AO or a spherical (Akreos Fit IOL in one eye and the other IOL in the second eye. Assessment 12 months postoperatively included photopic and mesopic contrast sensitivity testing. Higher-order aberrations (HOAs were computed. FDT testing was divided into four areas to evaluate the variation of the values at different points. The median values of the local pattern thresholds (median area contrast sensitivity [MACS] obtained with that division were calculated. Results: The Akreos AO group obtained statistically significantly lower values of HOAs and spherical aberration compared with the Akreos Fit group. There was a statistically significant between-group difference in contrast sensitivity under mesopic conditions at all spatial frequencies. No statistically significant differences were observed in mean deviation and pattern standard deviation. The aspheric IOL exhibited higher MACS in all areas, although a statistically significant difference was reached only in the 20-degree field area (P=0.043. Conclusion: Aspheric IOLs significantly reduced spherical aberration and HOAs, improving mesopic contrast sensitivity. Although there was a trend toward slightly improved FDT in the aspheric IOL group, it was not statistically significant.

  13. Biological performance of functionalized biomedical polymers for potential applications as intraocular lens.

    Science.gov (United States)

    Zheng, Zhiwen; Wang, Yingjun; Jiao, Yan; Zhai, Zhichen

    2016-08-01

    To study the biological performance of surface-modified biomedical polymer materials, a model of the functional mechanism of nonspecific adsorption resistance was constructed. Cell behavior on the surface and in vivo transplantation features of intraocular lens (IOL) materials, such as hydrophobic acrylic ester and polymethyl methacrylate (PMMA), were investigated. The results of cell adhesion and proliferation studies showed that the addition of hirudin can significantly resist epithelial cell adhesion, better than the pure amination process, and thereby inhibit excessive proliferation on the surface. Experiments on the eyes of rabbits indicated that the IOL surfaces with hirudin modification reduced the incidence of cell aggregation and inflammation. Combined with a study of protein-resistant layer construction with recombinant hirudin on the material surface, the mechanism of surface functionalization was determined. The biological performance indicated that nonspecific adsorption is greatly decreased due to the existence of amphiphilic ions or hydration layers, which lead to stability and long-term resistance to nonspecific adsorption. These results offer a theoretical basis for the use of traditional biomedical polymer materials in long-term clinical applications. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 1961-1967, 2016.

  14. Visual and Refractive Outcomes after Cataract Surgery with Implantation of a New Toric Intraocular Lens

    Directory of Open Access Journals (Sweden)

    Cinzia Mazzini

    2013-06-01

    Full Text Available Purpose: The aim of this study was to evaluate and report the visual, refractive and aberrometric outcomes of cataract surgery with implantation of the new aspheric Tecnis ZCT toric intraocular lens (IOL in eyes with low to moderate corneal astigmatism. Methods: We conducted a prospective study of 19 consecutive eyes of 17 patients (mean age: 78 years with a visually significant cataract and moderate corneal astigmatism [higher than 1 diopter (D] undergoing cataract surgery with implantation of the aspheric Tecnis ZCT toric IOL (Abbott Medical Optics. Visual, refractive and aberrometric changes were evaluated during a 6-month follow-up. Ocular aberrations as well as IOL rotation were evaluated by means of the OPD-Station II (Nidek. Results: The six-month postoperative spherical equivalent and power vector components of the refractive cylinder were within ±0.50 D in all eyes (100%. Postoperative logMAR uncorrected and corrected distance visual acuities (UDVA/CDVA were 0.1 (about 20/25 or better in almost all eyes (94.74%. The mean logMAR CDVA improved significantly from 0.41 ± 0.23 to 0.02 ± 0.05 (p Conclusion: Cataract surgery with implantation of the aspheric Tecnis ZCT IOL is a predictable and effective procedure for visual rehabilitation in eyes with cataract and low to moderate corneal astigmatism, providing an excellent postoperative ocular optical quality.

  15. Classification and latest advances of phakic intraocular lens%有晶状体眼人工晶状体的研究进展

    Institute of Scientific and Technical Information of China (English)

    骆丹艳; 杨亚波

    2015-01-01

    有晶状体眼人工晶状体(pIOL)按植入部位分为房角支撑型、虹膜固定型和后房型三种类型.随着材料和设计的改进,产品不断更新换代,由不可折叠变为可折叠,手术切口缩小,术后视觉效果改善,并发症相对减少.了解三种类型pIOL的发展过程和优缺点有助于医师根据患者条件及pIOL参数选择合适的人工晶状体.本文综述了pIOL的发展史及目前临床常用三种类型代表Acry-Sof、Artiflex/Veriflex、ICL的应用情况.%Phakic intraocular lens (pIOL) includes three types according to their intraocular position:angle-supported anterior chamber,iris-fixated anterior chamber,and posterior chamber.With the improvement of materials and designs,pIOL have always been upgrading,such as from unfoldable to foldable,smaller surgical incisions,better vision outcomes and less complications.Knowing the developing history,advantages and disadvantages of each type of pIOL,surgeons could choose the better type and suitable parameters of pIOL for different patients.The aim of this paper is to review the developing history of pIOL and introduce application details of three commonly used representatives in current clinic:AcrySof,Artiflex/Veriflex and ICL.

  16. Ultrasound Biomicroscopy Comparison of Ab Interno and Ab Externo Intraocular Lens Scleral Fixation.

    Science.gov (United States)

    Horiguchi, Lie; Garcia, Patricia Novita; Malavazzi, Gustavo Ricci; Allemann, Norma; Gomes, Rachel L R

    2016-01-01

    Purpose. To compare ab interno and ab externo scleral fixation of posterior chamber intraocular lenses (PCIOL) using ultrasound biomicroscopy (UBM). Methods. Randomized patients underwent ab externo or ab interno scleral fixation of a PCIOL. Ultrasound biomicroscopy was performed 3 to 6 months postoperatively, to determine PCIOL centration, IOL distance to the iris at 12, 3, 6, and 9 hours, and haptics placement in relation to the ciliary sulcus. Results. Fifteen patients were enrolled in the study. The ab externo technique was used in 7 eyes (46.6%) and the ab interno in 8 eyes (53.3%). In the ab externo technique, 14 haptics were located: 4 (28.57%) in the ciliary sulcus; 2 (14.28%) anterior to the sulcus; and 8 (57.14%) posterior to the sulcus, 6 in the ciliary body and 2 posterior to the ciliary body. In the ab interno group, 4 haptics (25.0%) were in the ciliary sulcus, 2 (12.50%) anterior to the sulcus, and 10 (75.0%) posterior to the sulcus, 4 in the ciliary body and 6 posterior to the ciliary body. Conclusions. Ab externo and ab interno scleral fixation techniques presented similar results in haptic placement. Ab externo technique presented higher vertical tilt when compared to the ab interno.

  17. Ultrasound Biomicroscopy Comparison of Ab Interno and Ab Externo Intraocular Lens Scleral Fixation

    Directory of Open Access Journals (Sweden)

    Lie Horiguchi

    2016-01-01

    Full Text Available Purpose. To compare ab interno and ab externo scleral fixation of posterior chamber intraocular lenses (PCIOL using ultrasound biomicroscopy (UBM. Methods. Randomized patients underwent ab externo or ab interno scleral fixation of a PCIOL. Ultrasound biomicroscopy was performed 3 to 6 months postoperatively, to determine PCIOL centration, IOL distance to the iris at 12, 3, 6, and 9 hours, and haptics placement in relation to the ciliary sulcus. Results. Fifteen patients were enrolled in the study. The ab externo technique was used in 7 eyes (46.6% and the ab interno in 8 eyes (53.3%. In the ab externo technique, 14 haptics were located: 4 (28.57% in the ciliary sulcus; 2 (14.28% anterior to the sulcus; and 8 (57.14% posterior to the sulcus, 6 in the ciliary body and 2 posterior to the ciliary body. In the ab interno group, 4 haptics (25.0% were in the ciliary sulcus, 2 (12.50% anterior to the sulcus, and 10 (75.0% posterior to the sulcus, 4 in the ciliary body and 6 posterior to the ciliary body. Conclusions. Ab externo and ab interno scleral fixation techniques presented similar results in haptic placement. Ab externo technique presented higher vertical tilt when compared to the ab interno.

  18. Ultrasound Biomicroscopy Comparison of Ab Interno and Ab Externo Intraocular Lens Scleral Fixation

    Science.gov (United States)

    Horiguchi, Lie; Garcia, Patricia Novita; Malavazzi, Gustavo Ricci; Allemann, Norma

    2016-01-01

    Purpose. To compare ab interno and ab externo scleral fixation of posterior chamber intraocular lenses (PCIOL) using ultrasound biomicroscopy (UBM). Methods. Randomized patients underwent ab externo or ab interno scleral fixation of a PCIOL. Ultrasound biomicroscopy was performed 3 to 6 months postoperatively, to determine PCIOL centration, IOL distance to the iris at 12, 3, 6, and 9 hours, and haptics placement in relation to the ciliary sulcus. Results. Fifteen patients were enrolled in the study. The ab externo technique was used in 7 eyes (46.6%) and the ab interno in 8 eyes (53.3%). In the ab externo technique, 14 haptics were located: 4 (28.57%) in the ciliary sulcus; 2 (14.28%) anterior to the sulcus; and 8 (57.14%) posterior to the sulcus, 6 in the ciliary body and 2 posterior to the ciliary body. In the ab interno group, 4 haptics (25.0%) were in the ciliary sulcus, 2 (12.50%) anterior to the sulcus, and 10 (75.0%) posterior to the sulcus, 4 in the ciliary body and 6 posterior to the ciliary body. Conclusions. Ab externo and ab interno scleral fixation techniques presented similar results in haptic placement. Ab externo technique presented higher vertical tilt when compared to the ab interno. PMID:27293878

  19. Effect of an ultraviolet-filtering intraocular lens on cystoid macular edema

    Energy Technology Data Exchange (ETDEWEB)

    Kraff, M.C.; Sanders, D.R.; Jampol, L.M.; Lieberman, H.L.

    1985-03-01

    A prospective double-masked study of 301 patients was undertaken to compare the effect of ultraviolet (UV) filtering in implant intraocular lenses (IOL) on the angiographic incidence of cystoid macular edema (CME) in patients undergoing extracapsular cataract extraction. Patients were randomized to receive either a posterior chamber IOL that contained UV-absorbing chromophore or an identical IOL which did not contain such a chromophore. All patients were scheduled for fluorescein angiography between three and six months after surgery; 228 angiograms were obtained that were readable for the presence or absence of angiographic CME. The mean interval following surgery was 4.3 months. The incidence of CME was 18.8% (21 of 112) in patients who received lenses without UV-filtering chromophore and 9.5% (11 of 116) in patients who received IOLs that contained UV-filtering chromophore. These findings show that UV-filtering-IOLs resulted in a statistically significant decrease in the incidence of CME. The presence or absence of the UV-filtering chromophore did not, however, significantly affect visual acuity in the early postoperative period.

  20. CLINICAL PRESENTATION OF LENS INDUCED GLAUCOMA: STUDY OF EPIDEMIOLOGY, DURATION OF SYMPTOMS, INTRAOCULAR PRESSURE AND VISUAL ACUITY

    Directory of Open Access Journals (Sweden)

    Venkataratnam

    2015-10-01

    Full Text Available BACKGROUND: Lens Induced Glaucoma is a common cause of ocular morbidity. OBJECTIVES: Our study was to know the Epidemiological factors, Duration of Symptoms, Visual Acuity and Intraocular Pressure in the clinical Presentation of Lens Induced Glaucoma. MATERIALS AND METHODS : This w as a tertiary hospital based prospective study in the department of Glaucoma, Sarojini Devi Eye Hospital and Regional Institute of Ophthalmology (RIO, Osmania Medical College, Hyderabad over a period from March 2015 to August 2015. 50 Patients clinically diagnosed as Lens Induced Glaucoma (LIG were studied with the data of Age, Sex, literacy, Laterality and Rural / Urban status with the duration of symptoms, Intraocular pressure and Visual Acuity. The data was analyzed by simple statistical methods. RESULT S: 50 patients, clinically diagnosed as Lens Induced Glaucoma (LIG were studied. Age group distribution was 1(2.0% in 40 - 50yrs, 13 ( 26.0% in >50 - 60yrs, 26(52.0% in >60 - 70yrs and 10(20.0% in > 70 yrs. Sex distribution was 23(46.0% of Males and 27(54.0% of Females. Urban / Rural status was 15(30.0% of Urban and 35(70.0% of Rural. Literacy status was 7(14.0% of Literate and 43(86.0% of Illiterate. Laterality was RE in 24(48.0% and LE in 26(52.0%. Duration of the presenting symptoms before re porting to the Hospital was 12.0% in 2wks. Intraocular pressure (IOP in mm of Hg showed no case (0.0% in 20 – 40, 27(54.0% in >40 - 60 and 5(10.0% >60 wit h the Mean IOP of 42.12 mm of Hg. Visual Acuity (VA was PL +ve in 24(48.0 and HM - 3/60. CONCLUSIONS: Increasing age, female gender, rural, illiterate, and delayed reporting to the hospital after the pre senting symptoms were the common risk factors with increased Intraocular pressure and poor visual acuity in the clinical presentation of Lens induced Glaucoma.

  1. Visian implantable contact lens versus AcrySof Cachet phakic intraocular lenses: comparison of aberrmetric profiles

    Directory of Open Access Journals (Sweden)

    Hosny MHM

    2013-07-01

    Full Text Available Mohamed HM Hosny, Ahmad MM ShalabyDepartment of Ophthalmology, Faculty of Medicine, Cairo University, Cairo, EgyptPurpose: To evaluate the in vivo aberrometric performance of two phakic intraocular lenses (PIOLs; the Visian implantable contact lens (ICL and the AcrySof Cachet PIOL.Methods: Thirty eight eyes from 29 patients with an age range of 23–32 years and more than 9 D of myopia were divided into two groups; one group of 20 eyes received a Visian ICL model V4c, another group of 18 eyes received an AcrySof Cachet PIOL. Total higher order aberrations (HOAs root mean square, total coma, and total spherical aberrations were recorded pre and 6 weeks postoperatively to evaluate and compare the aberrometric performance of the Visian ICL and the AcrySof Cachet PIOL implanted in highly myopic patients.Results: Preoperatively, there were no significant differences in any studied parameters, except for preoperative spherical equivalent. Postoperatively, there were no statistically significant differences in the induction of HOAs between both PIOLs. The reduction in spherical aberrations was statistically significant in each group as well as in all study patients.Conclusion: Both AcrySof Cachet PIOL and ICLs are effective phakic implants to correct high refractive errors. They both induce small amounts of negative spherical aberration that do not affect the total HOAs, yet reduce the positive ocular spherical aberration. This result is expected to improve the quality of vision in such patients.Keywords: high myopia, higher order aberrations, refractive procedures, phakic implants

  2. Accelerated 20-year sunlight exposure simulation of a photochromic foldable intraocular lens in a rabbit model

    Science.gov (United States)

    Werner, Liliana; Abdel-Aziz, Salwa; Peck, Carolee Cutler; Monson, Bryan; Espandar, Ladan; Zaugg, Brian; Stringham, Jack; Wilcox, Chris; Mamalis, Nick

    2011-01-01

    PURPOSE To assess the long-term biocompatibility and photochromic stability of a new photochromic hydrophobic acrylic intraocular lens (IOL) under extended ultraviolet (UV) light exposure. SETTING John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA. DESIGN Experimental study. METHODS A Matrix Aurium photochromic IOL was implanted in right eyes and a Matrix Acrylic IOL without photochromic properties (n = 6) or a single-piece AcrySof Natural SN60AT (N = 5) IOL in left eyes of 11 New Zealand rabbits. The rabbits were exposed to a UV light source of 5 mW/cm2 for 3 hours during every 8-hour period, equivalent to 9 hours a day, and followed for up to 12 months. The photochromic changes were evaluated during slitlamp examination by shining a penlight UV source in the right eye. After the rabbits were humanely killed and the eyes enucleated, study and control IOLs were explanted and evaluated in vitro on UV exposure and studied histopathologically. RESULTS The photochromic IOL was as biocompatible as the control IOLs after 12 months under conditions simulating at least 20 years of UV exposure. In vitro evaluation confirmed the retained optical properties, with photochromic changes observed within 7 seconds of UV exposure. The rabbit eyes had clinical and histopathological changes expected in this model with a 12-month follow-up. CONCLUSIONS The new photochromic IOL turned yellow only on exposure to UV light. The photochromic changes were reversible, reproducible, and stable over time. The IOL was biocompatible with up to 12 months of accelerated UV exposure simulation. PMID:21241924

  3. Accuracy of Corneal Power Measurements for Intraocular Lens Power Calculation after Myopic Laser In situ Keratomileusis

    Science.gov (United States)

    Helaly, Hany A.; El-Hifnawy, Mohammad A. M.; Shaheen, Mohamed Shafik; Abou El-Kheir, Amr F.

    2016-01-01

    Purpose: To evaluate the accuracy of corneal power measurements for intraocular lens (IOL) power calculation after myopic laser in situ keratomileusis (LASIK). Methods: The study evaluated 45 eyes with a history of myopic LASIK. Corneal power was measured using manual keratometry, automated keratometry, optical biometry, and Scheimflug tomography. Different hypothetical IOL power calculation formulas were performed for each case. Results: The steepest mean K value was measured with manual keratometry (37.48 ± 2.86 D) followed by automated keratometry (37.31 ± 2.83 D) then optical biometry (37.06 ± 2.98 D) followed by Scheimflug tomography (36.55 ± 3.08). None of the K values generated by Scheimflug tomography were steeper than the measurements from the other 3 instruments. Using equivalent K reading (EKR) 4 mm with the Double-K SRK/T formula, the refractive outcome generated 97.8% of cases within ± 2 D, 80.0% of cases within ± 1 D, and 42.2% of cases within ± 0.5 D. The best combination of formulas was “Shammas-PL + Double-K SRK/T formula using EKR 4 mm.” Conclusion: Scheimflug tomography imaging using the Holladay EKR 4 mm improved the accuracy of IOL power calculation in post-LASIK eyes. The best option is a combination of formulas. We recommended the use the combined “Shammas-PL ± Double-K SRK/T formula using EKR 4 mm”h for optical outcomes. PMID:26957851

  4. Clinical Outcomes after Uncomplicated Cataract Surgery with Implantation of the Tecnis Toric Intraocular Lens

    Science.gov (United States)

    Lubiński, Wojciech; Kaźmierczak, Beata; Gronkowska-Serafin, Jolanta; Podborączyńska-Jodko, Karolina

    2016-01-01

    Purpose. To evaluate the clinical outcomes after uncomplicated cataract surgery with implantation of an aspheric toric intraocular lens (IOL) during a 6-month follow-up. Methods. Prospective study including 27 consecutive eyes of 18 patients (mean age: 66.1 ± 11.4 years) with a visually significant cataract and corneal astigmatism ≥ 0.75 D and undergoing uncomplicated cataract surgery with implantation of the Tecnis ZCT toric IOL (Abbott Medical Optics). Visual, refractive, and keratometric outcomes as well as IOL rotation were evaluated during a 6-month follow-up. At the end of the follow-up, patient satisfaction and perception of optical/visual disturbances were also evaluated using a subjective questionnaire. Results. At 6 months after surgery, mean LogMAR uncorrected (UDVA) and corrected distance visual acuity (CDVA) were 0.19 ± 0.12 and 0.14 ± 0.10, respectively. Postoperative UDVA of 20/40 or better was achieved in 92.6% of eyes. Mean refractive cylinder decreased significantly from −3.73 ± 1.96 to −1.42 ± 0.88 D (p < 0.001), while keratometric cylinder did not change significantly (p = 0.44). Mean absolute IOL rotation was 1.1 ± 2.4°, with values of more than 5° in only 2 eyes (6.9%). Mean patient satisfaction score was 9.70 ± 0.46, using a scale from 0 (not at all satisfied) to 10 (very satisfied). No postoperative optical/visual disturbances were reported. Conclusion. Cataract surgery with implantation of the Tecnis toric IOL is an effective method of refractive correction in eyes with corneal astigmatism due to the good IOL positional stability, providing high levels of patient's satisfaction. PMID:27022478

  5. Pupil Dilation with Intracameral Epinephrine Hydrochloride during Phacoemulsification and Intraocular Lens Implantation

    Science.gov (United States)

    Yu, A-Yong; Guo, Hua; Wang, Qin-Mei; Bao, Fang-Jun; Huang, Jing-Hai

    2016-01-01

    Objective. To investigate mydriatic effect of intracamerally injected epinephrine hydrochloride during phacoemulsification and intraocular lens (IOL) implantation. Methods. Eighteen cataract patients for bilateral phacoemulsification were enrolled. To dilate pupil, one eye was randomly selected to receive intracamerally 1 mL epinephrine hydrochloride 0.001% for 1 minute after corneal incision (intracameral group), and the contralateral eye received 3 drops of compound tropicamide 0.5% and phenylephrine 0.5% at 5-minute intervals 30 minutes before surgery (topical group). Pupil diameters were measured before corneal incision, before ophthalmic viscoelastic device (OVD) injection, after OVD injection, before IOL implantation, and at the end of surgery. Results. At each time point, the mean pupil diameter in the intracameral group was 2.20 ± 0.08, 5.09 ± 0.20, 6.76 ± 0.19, 6.48 ± 0.18, and 5.97 ± 0.24 mm, respectively, and in the topical group it was 7.98 ± 0.15, 7.98 ± 0.15, 8.53 ± 0.14, 8.27 ± 0.16, and 7.93 ± 0.20 mm, respectively. The topical group consistently had larger mydriatic effects than the intracameral group (P < 0.05). The onset of mydriatic effect was rapid in the intracameral group. There was no difference in surgical performance or other parameters between groups. Conclusions. Intracameral epinephrine hydrochloride appears to be an alternative to the mydriatic modalities for phacoemulsification and IOL implantation. In comparison with topical mydriatics, intracameral epinephrine hydrochloride offers easier preoperative preparation, more rapid pupil dilation, and comparable surgical performance. PMID:26904274

  6. Secondary intraocular lens implantation following infantile cataract surgery: intraoperative indications, postoperative outcomes.

    Science.gov (United States)

    Wood, K S; Tadros, D; Trivedi, R H; Wilson, M E

    2016-09-01

    PurposeThe purpose of this study was to determine the long-term complications and outcomes of secondary intraocular lens (IOL) implantation in patients with congenital cataracts.Patients and MethodsThe medical records of children operated for secondary IOL implantation surgery between 2000 and 2014 were retrospectively reviewed. Those who had undergone their initial congenital cataract surgery before 7 months of age were included and were analyzed for intra- and postoperative factors and postoperative refractive outcomes. We focused on three complications: visual axis opacification (VAO), glaucoma, and IOL exchange after at least 1 year of follow-up.ResultsA total of 49 eyes of 49 patients were analyzed for intraoperative indications. Of those, 37 eyes of 37 patients had at least 1 year of follow-up and were analyzed for postoperative outcomes. The mean age at secondary implantation was 55.2±21.6 months. At secondary implantation, 69.4% of eyes were implanted in the capsular bag, 28.6% in the sulcus, and 2.0% that were angle-supported. There was no significant correlation between the site of secondary IOL implantation and age at implantation (P=0.216). The mean follow-up after implantation was 57.6±33.6 months. The rate of VAO was 5.4%, the rate of glaucoma occurring after secondary implantation was 16.2%, and the rate of IOL exchange was 2.7%. The median visual acuity at final follow-up was 20/40. For patients with unilateral cataracts it was 20/60 and for bilateral patients it was 20/30.ConclusionsThe secondary IOL implantation in children is a relatively safe procedure associated with low rates of postoperative complications. Visual outcomes are acceptable and are better for bilateral patients than for unilateral patients.

  7. Outcomes of excimer laser enhancements in pseudophakic patients with multifocal intraocular lens

    Science.gov (United States)

    Schallhorn, Steven C; Venter, Jan A; Teenan, David; Schallhorn, Julie M; Hettinger, Keith A; Hannan, Stephen J; Pelouskova, Martina

    2016-01-01

    Purpose The aim of this study was to assess visual and refractive outcomes of laser vision correction (LVC) to correct residual refraction after multifocal intraocular lens (IOL) implantation. Patients and methods In this retrospective study, 782 eyes that underwent LVC to correct unintended ametropia after multifocal IOL implantation were evaluated. Of all multifocal lenses implanted during primary procedure, 98.7% were refractive and 1.3% had a diffractive design. All eyes were treated with VISX STAR S4 IR excimer laser using a convectional ablation profile. Refractive outcomes, visual acuities, patient satisfaction, and quality of life were evaluated at the last available visit. Results The mean time between enhancement and last visit was 6.3±4.4 months. Manifest spherical equivalent changed from −0.02±0.83 D (−3.38 D to +2.25 D) pre-enhancement to 0.00±0.34 D (−1.38 D to +1.25 D) post-enhancement. At the last follow-up, the percentage of eyes within 0.50 D and 1.00 D of emmetropia was 90.4% and 99.5%, respectively. Of all eyes, 74.9% achieved monocular uncorrected distance visual acuity 20/20 or better. The mean corrected distance visual acuity remained the same before (−0.04±0.06 logMAR [logarithm of the minimum angle of resolution]) and after LVC procedure (−0.04±0.07 logMAR; P=0.70). There was a slight improvement in visual phenomena (starburst, halo, glare, ghosting/double vision) following the enhancement. No sight-threatening complications related to LVC occurred in this study. Conclusion LVC in pseudophakic patients with multifocal IOL was safe, effective, and predictable in a large cohort of patients. PMID:27175059

  8. Intraocular lens power calculations using a Scheimpflug camera to measure corneal power.

    Science.gov (United States)

    Xu, K; Hao, Y; Qi, H

    2014-07-01

    We measured corneal power using an Oculus Pentacam(®) to assess its accuracy for calculating intraocular lens (IOL) power after myopic refractive surgery. A series of corneal power measurements were performed on 22 patients (43 eyes) who had undergone myopic refractive surgery. In 37 of the 43 eyes, phacoemulsification and IOL implantation subsequently were performed. Conventional keratometry and three corneal measurements (mean true net power, central true net power, and 4.5 mm equivalent K reading) obtained using a Pentacam were analyzed and compared to values derived from the clinical history method. Prediction errors of three Pentacam corneal power measurements inserted in third generation IOL formulas also were compared. Analysis of the variance showed that only two Pentacam corneal measurements, mean true net power and central true net power, were not significantly different from those of the clinical history method. Mean true net power was correlated more closely with the clinical history method corneal power than other corneal power values. The one-sample t-test showed that of three Pentacam corneal measurements combined with third-generation formulas, only the mean true net power inserted in the SRK/T implant power calculation formula was not significantly different from zero. The percentages of eyes within ± 0.50 D and ± 1.00 D of the refractive prediction error of this method were 67.6% and 86.5%, respectively. Mean true net power inserted in the SRK/T formula can be used to calculate directly IOL power after myopic refractive surgery.

  9. Pars plana vitrectomy and artisan iris fixated intraocular lens for aphakia in complicated vitreoretinal referrals

    Institute of Scientific and Technical Information of China (English)

    Lolly Pattnaik; Kusai Almozawak; Susanne Binder

    2013-01-01

    Objective:To evaluate postoperative outcome of cases undergoingArtisan aphakic iris fixated intraocular lens implantation(IOL) in complicated vitreoretinal referrals, atOutpatientDepartment ofOphthalmology,RudolfFoundationClinic,Vienna,Austria.Methods:It was a retrospective interventional case series involving24 patients who have undergone pars plana vitrectomy(PPV) with theArtisan iris fixated lens implantation procedure.Herein, procedures, preoperative corrected distance visual acuity(CDVA), causes of referral, post-operativeCDVA and clinical complications were recorded.Results:The mean age of24 patients(17 males and7 females) was(69.88±14.50), with the range32-83 years.The mean preoperative visual acuity was(1.40±0.83) with the range0.46-3.00 logMAR units.After a mean follow up period for(3.12±2.54) with the range1-12 months, the meanCDVA at the last follow-up was(0.95±0.84) logMAR units with the range0.097-3.000 logMAR units.Complicated cataract surgery was the most common cause for referral with the value,54.21% among cases,n=13.Secondary glaucoma was the commonest postoperative complication25.00% withn=6.The other complications included were transient hypotony(n=3;12.51%), hyphaema(n=2;8.34%), corneal oedema(n=1;4.17%), corneal erosion (n=1;4.17%), vitreous haemorrhage(n=2;8.34%) and oval pupil(n=1;4.17%).Pairedt test result showed no significant difference between preoperative and postoperative visual acuities(P>0.05). Conclusions:Artisan iris fixatedIOL’s are a safe and effective option in eyes with concomitant poor capsular support and vitreoretinal complications requiringPPV.The postoperative visual acuity depends on the underlying pathological features present preoperatively.

  10. Clinical analysis of intraocular lens explantation in 68 eyes%人工晶状体取出术68只眼临床分析

    Institute of Scientific and Technical Information of China (English)

    楚美芳; 柴芳; 张倩; 马波

    2016-01-01

    目的 通过对人工晶状体取出病例的原因分析,探讨人工晶状体植人手术的适应证及并发症的防治.方法 回顾在西安市第四医院眼科自2013年1月至2015年1月行人工晶状体取出术共65例68只眼进行临床分析.结果 导致人工晶状体取出的常见原因依次为人工晶状体脱位或半脱位、视网膜脱离、人工晶状体度数误差、眼内炎等.人工晶状体植入至取出间隔时间最短1d,最长为15年,人工晶状体植入多在术后1月内和2~5年发生严重并发症导致人工晶状体取出.取出的人工晶状体:后房型64只眼,ICL3只眼,前房型1只眼.术后视力:53只眼(77.9%)有不同程度的提高,14只眼(20.6%)无明显变化,1只眼因并发眼内炎,术后视力由光感变为无光感.结论 人工晶状体植入术后的严重并发症是导致人工晶状体取出的直接原因.术前严格掌握人工晶状体植入的适应证,有效控制术中、术后的并发症,是避免术后人工晶状体取出的重要保证,及时准确地取出人工晶状体,同时酌情植入适当的人工晶状体,可有效提高患者视力和生活质量.%Objective To analyze the causes of explantation of intraocular lens (IOL) postoperation,and explore surgery accommodation and prevent surgery complications.Methods The causes for 65 cases (68 eyes) of lens explantation from January 2013 to January 2015 were retrospectively analyzed.Results The most common causes of IOL explantation were IOL decentration and dislocation,retinal detachment,postoperative refractive error and endophthalmitis.The shortest interval of IOL implantation to explantation was one day,while the longest interval was 15 years.Intraocular lens implantation surgery in one month and 2 ~ 5 years was more prone to occur serious complications leading to IOL explantation.IOL types of explantation including:posterior chamber IOL in 64 eyes,ICL (implantable collamer lens) in 3 eyes,and anterior chamber IOL

  11. Clinical analysis of 49 cases with intraocular lens dislocation%人工晶状体脱位49例临床分析

    Institute of Scientific and Technical Information of China (English)

    王海燕; 庞秀琴; 何雷; 裴雪婷; 王绍莉; 卢海

    2012-01-01

    Objective To discuss the clinical characteristics of intraocular lens (IOL) dislocation. Design Retrospective cases series. Participants 49 eyes (49 cases) of intraocular lens dislocation in Beijing Tongren Hospital from 2004 to 2011. Methods Clinical data of intraocular lens dislocation were reviewed retrospectively. Main Outcome Measures Age, original disease, history of disease, position and type of intraocular lens, cause, surgical method, and complication. Results Majority of 49 cases of intraocular lens dislocation were cases with surgery of age-related cataract (46.9%) and traumatic cataract (28.6%). 6 cases with dislocation of intraocular lens with ciliary sulcus fixation happened 1 year after surgery. Majority of intraocular lenses dislocated located in vitreous body (53.1%) and "C" loop (89.8%). 75.5% of causes were original disease and surgery. Ciliary sulcus fixation or re-fixation of intraocular lens (47 eyes, 95.9%) could achieve good centration and stability of the intraocular lens. Naked vision of 0.1 or more accounted for 59.6% at 2 weeks after fixation or re-fixation. Conclusion Intraocular lens dislocation is related with original disease and surgery. Ciliary sulcus fixation of intraocular lens is an effective strategy to treat intraocular lens dislocation. But intraocular lens with ciliary sulcus fixation still happens to dislocate. (Ophthalmol CHN, 2012, 21: 47-51)%目的 探讨人工晶状体(IOL)脱位的临床特点.设计 回顾性病例系列.研究对象 北京同仁医院2004-2011年治疗的IOL脱位49例49眼.方法 对IOL脱位患者的临床资料进行同顾性分析.主要指标 年龄、原IOL植入原因,发病时间,脱位IOL位置及类型,IOL脱位诱因,手术治疗方法及并发症.结果 49眼IOL脱位中,老年性白内障和外伤性白内障摘除联合IOL植入术者较多,分别占46.9%、28.6%.6例睫状沟固定IOL脱位均发生于手术1年后.脱位IOL53.1%位于玻璃体腔内.89.8

  12. Toric人工晶状体临床应用的研究进展%Clinical applications of Toric intraocular lens

    Institute of Scientific and Technical Information of China (English)

    肖显文; 张红; 田芳

    2014-01-01

    Toric intraocular lens (IOL),known as IOL with composite surface,is a new refractive IOL to correct astigmatism by cylindrical lens combined with spherical IOL.Toric IOL has become a reasonable,effective and stable refractive method to correct preoperative astigmatism of cataract patients following the continuous development of materials and technical improvements since it was applied clinically first in 1994.The new multifocal Toric IOL provides good distance,intermediate and near functional vision and enables the complete spectacle independence for cataract patients.%散光型人工晶状体(Toric intraocular lens,Toric IOL)也称复合曲面IOL,是将矫正散光的圆柱镜与IOL的球镜相结合的一种新型屈光性IOL.自1994年第一枚Toric IOL用于临床以来,Toric IOL的材料和设计得到不断改进,现已成为矫正白内障患者术前角膜散光的一种合理、有效并且稳定的屈光矫正方式.多焦点Toric IOL的出现则为白内障患者提供良好的远中近视力,真正满足白内障患者的脱镜需求.

  13. 后房型有晶状体眼人工晶状体植入术矫正超高度近视的视觉质量研究%Visual quality after phakic posterior chamber intraocular lens implantation for hyper-high myopia

    Institute of Scientific and Technical Information of China (English)

    王佼佼; 张立军; 牟亚男; 韩茜

    2014-01-01

    目的 探讨后房型有晶状体眼人工矫正晶状体(intraocular corrective lens,ICL)植入术治疗超高度近视后患者的视觉质量.方法 收集2010年2月至2012年12月就诊于我院的-10.0 D以上的接受后房型有晶状体眼ICL植入术治疗高度近视患者38例(76眼)为观察组,选取同期就诊于我院的-10.0 D以上的接受角膜屈光手术的患者31例(62眼)作为对照组.术前2组患者最佳矫正视力、对比敏感度、屈光状态等指标比较,差异均无统计学意义(均为P>0.05).比较2组术前及术后10d、1个月、3个月、6个月及12个月裸眼远近视力、最佳矫正视力、屈光度、波阵面相差及对比敏感度等.结果 术后观察组患者各时间点随访的裸眼视力均超过术前最佳矫正视力,术后1个月及3个月2组裸眼视力比较均无统计学差异(均为P>0.05),术后12个月观察组裸眼视力为1.03±0.18、对照组裸眼视力为0.96±0.24,2组比较差异有统计学意义(=2.000,P=0.025);观察组最佳矫正视力为1.05±0.17、对照组最佳矫正视力为1.06±0.17,2组差异无统计学意义(t=-0.341,P=0.970).观察组术后高阶像差为(0.515±0.122) μm,与术前(0.400±0.060) μm相比差异无统计学意义(t=-7.825,P=0.128),对照组术后高阶像差为(0.818±0.151) μm,与术前(0.399±0.009) μm相比差异有统计学意义(t=22.580,P=0.037),2组术后高阶像差相比差异有统计学意义(t=13.049,p=o.005).观察组术后1个月对比敏感度恢复到术前水平,对照组对比敏感度始终低于术前,各时间点观察组对比敏感度均优于对照组,差异均有显著统计学意义.结论 ICL植入术对于超高度近视的矫正较准分子激光原位角膜磨镶术更安全、稳定、有效.

  14. Effect of posterior chamber phakic intraocular lens implantation for high myopia on the stereopsis%有晶状体眼后房型人工晶状体植入术对高度近视患者立体视觉的影响

    Institute of Scientific and Technical Information of China (English)

    申笛; 姬菁文; 梁厚成; 马挺; 龙潭

    2016-01-01

    AIM:To observe the effect of posterior chamber phakic intraocuIar Iens impIantation for high myopia on the stereopsis. To evaIuate the impIantation of impIantabIe contact Iens from the highest form of visuaI angIe. METHODS:Fourty-six patients ( 92 eyes ) with high myopia were incIuded from January to December 2014. The average age of patients was 26. 13 ± 3. 37 ( 19 ~ 32 ) years, and 20 maIes ( 43%) and 26 femaIes ( 57%) were observed. AnaIysis the stereopsis of these patients before and after the impIantation of posterior chamber phakic intraocuIar Iens. RESULTS:The mean sphericaI equivaIent of aII the eyes was 10. 02±2. 71D before and -0. 02±0. 25D after surgeries. There was significant difference on the sphericaI equivaIent (t=14. 062, P=0. 000). There were 6 patients with the bIind of near stereopsis, the near stereopsis of the rest patients were 637. 50 ± 462. 08arcsec before the surgeries and there were none with the bIind of near stereopsis after surgeries. The near stereopsis of aII the patients were 126. 09 ± 165. 78arcsec after surgeries. There were 12 patients with the bIind of far stereopsis, the far stereopsis of the rest patients were 400. 59 ± 257. 00arcsec before the surgeries. After surgeries there were 2 patients with the bIind of far stereopsis, the far stereopsis of the rest patients were 152. 73 ± 111. 65arcsec. There were both significant differences on the near stereopsis ( Z=-5. 725,P=0. 000 ) and the far stereopsis ( Z=-4. 976, P=0. 000 ) before and after surgeries. CONCLUSION:Posterior chamber phakic intraocuIar Iens impIantation not onIy correct the ametropic of the high myopia, but aIso improve the visuaI acuity and the stereopsis.%目的::观察有晶状体眼人工晶状体植入术对高度近视患者立体视觉的影响,从视觉最高形式的角度评价有晶状体眼后房型人工晶状体( implantable contact lens, ICL )植入术的手术疗效。方法:分析2014-01/12于我院行有晶状体眼人工晶状体

  15. Quantitative Measurements of the Decentration Distance of Four Kinds of Intraocular Lens

    Institute of Scientific and Technical Information of China (English)

    Bo Feng; Zhende Lin; Jianjing Li; Yonghua Li

    2004-01-01

    Purpose:To investigate a quantitative method to measure decentration distance(DD) and analyze the DD of four kinds of intraocular lenses (IOLs).Methods :The pseudophakic eye photos were taken under the slit lamp after the IOLs were implanted a year or longer. Then the images were inputted into a computer and the Photoshop software was applied to analyze the DD. Four kinds of IOLs were analyzed,including AcrySof MA60BM (11 eyes), Allergan SA40N (11 eyes), AcrySof SA60AT/SA30AL (5 eyes), Corneal Quattro (4 eyes).Results:The mean value of DD was (0.264 3±0.157 4)mm in the AcrySof MA60BM group,(0.353 6±0.171 9)mm in the Array SA40N group,(0.309 9±0.152 9)mm in the SA60AT/SA30AL group, and (0.326 1±0.187 7)mm in the Quattro group, The difference of the DD values among these 4 kinds of IOLs had no statistic significance (F=0.506,P=0.681) and the values were not equal to zero (t=10.508, P < 0.001). Conclusion:The Photoshop method is a simple and efficient way for DD analysis. The modern foldable posterior-chamber-IOLs have good centration performances when implanted into the capsular bags. Eye Science 2004;20:48-51.

  16. Experience of nursing care of phacoemulsification and intraocular lens implantation for cataract%白内障超声乳化人工晶体植入术的护理体会

    Institute of Scientific and Technical Information of China (English)

    曾迎春

    2015-01-01

    目的:总结白内障超声乳化人工晶体植入术的护理经验,进一步提高护理质量。方法:收治行白内障超声乳化人工晶体植入术患者200例(240眼),给予心理护理,术前、术中和术后的护理。结果:治疗前后的眼压、无光感、前房深度差异有统计学意义(P<0.05),与治疗前相比,治疗后患者视力明显改善(P<0.05)。结论:加强对白内障患者的心理护理,及术前、术中和术后的护理,可以明显提高白内障超声乳化人工晶体植入术的护理质量。%Objective:To summarize the experience of nursing of cataract phacoemulsification and intraocular lens implantation,to further improve the quality of nursing care.Methods:200 cases(240 eyes) of cataract patients with phacoemulsification and intraocular lens implantation were selected,they were given psychological nursing,preoperative,intraoperative and postoperative nursing care.Results:The intraocular pressure, anterior chamber depth of no light perception,the differences between the intraocular pressure,nothing in light,anterior chamber depth before and after treatment were statistically significant(P<0.05), compared with before treatment,after treatment,the visual acuity was improved significantly(P<0.05).Conclusion:To strengthen the psychological nursing,preoperative,intraoperative and postoperative nursing care for patients with cataract can significantly improve the quality of nursing care for phacoemulsification and intraocular lens implantation for cataract.

  17. Meta-analysis and review: effectiveness, safety, and central port design of the intraocular collamer lens

    Directory of Open Access Journals (Sweden)

    Packer M

    2016-06-01

    . Keywords: refractive surgery, Phakic lens, posterior chamber, myopia

  18. Evaluation of Visual Outcomes in Patients Implanted with Acri.LISA 356D Multifocal Intraocular Lens

    Directory of Open Access Journals (Sweden)

    Sümeyra Yuvac›

    2011-08-01

    Full Text Available Purpose: To assess the visual results after implantation of the bifocal Acri.LISA 356D intraocular lens (IOL. Material and Method: Thirty-three eyes of 26 patients who had undergone cataract extraction by phacoemulsification technique were implanted with Acri.LISA 356 D IOL. All eyes were tested both at far and near distance at mesopic and photopic room light levels (5 and 85 cd/m2, in the following 1st and 3rd months after the operation. All eyes were tested for far, intermediate and near visual acuity, contrast sensitivity, refractive errors, glare and visual complaints, and need for spectacles. Results: The mean age of the patients was 58.2±9.3 years. Out of the 26 patients who participated in the study, nineteen (8 female, 11 male had unilateral and 7 patients (5 female, 2 male had bilateral implantation. At 3-month postoperative visit, the mean best-corrected distance visual acuity was 0.94±0.08, the best distance-corrected near visual acuity was 0.77±0.12 and the best distance-corrected intermediate (70cm. visual acuity was 0.67±0.10. Distance visual acuity was significantly better than intermediate and near visual acuities, while near visual acuity was statistically significantly better than intermediate visual acuity (p<0.05 for each. Postoperative mean spherical equivalent was -0.85±0.55 D. At 1 month, contrast sensitivity was low, especially at near under both illumination levels and, at 3 months, low contrast sensitivity level persisted at near under mesopic conditions only at high spatial frequencies. The incidence of halos was higher in patients with higher astigmatism. Although it seemed that 74% of patients needed eyeglasses for far, the rate of using eyeglasses was only 15%. Discussion: The Acri.LISA 356D, which is a bifocal hybrid IOL, provided satisfaction for far/near visual acuity and contrast sensitivity under photopic and mesopic conditions. However, it is not successful at the same degree for intermediate distances

  19. Astigmatism management in cataract surgery with Precizon® toric intraocular lens: a prospective study

    Science.gov (United States)

    Vale, Carolina; Menezes, Carlos; Firmino-Machado, J; Rodrigues, Pedro; Lume, Miguel; Tenedório, Paula; Menéres, Pedro; Brochado, Maria do Céu

    2016-01-01

    Purpose The purpose of this study was to evaluate the visual and refractive outcomes and rotational stability of the new aspheric Precizon® toric intraocular lens (IOL) for the correction of corneal astigmatism in cataract surgery. Setting Department of Ophthalmology, Hospital Geral de Santo António – Centro Hospitalar do Porto, EPE and Hospital de Pedro Hispano, Matosinhos, Portugal. Design This was a prospective clinical study. Patients and methods A total of 40 eyes of 27 patients with corneal astigmatism greater than 1.0 diopter (D) underwent cataract surgery with implantation of Precizon® toric IOL. IOL power calculation was performed using optical coherence biometry (IOLMaster®). Outcomes of uncorrected (UDVA) and best-spectacle corrected distance visual acuities (BCDVA), refraction, and IOL rotation were analyzed at the 1st week, 1st, 3rd, and 6th month’s evaluations. Results The median postoperative UDVA was better than preoperative best-spectacle corrected distance visual acuity (0.02 [0.06] logMAR vs 0.19 [0.20] logMAR, P<0.001). At 6 months, postoperative UDVA was 0.1 logMAR or better in 95% of the eyes. At last follow-up, the mean spherical equivalent was reduced from −3.35±3.10 D to −0.02±0.30 D (P<0.001) with 97.5% of the eyes within ±0.50 D of emmetropia. The mean preoperative keratometric cylinder was 2.34±0.95 D and the mean postoperative refractive cylinder was 0.24±0.27 D (P<0.001). The mean IOL rotation was 2.43°±1.55°. None of the IOLs required realignment. Conclusion Precizon® toric IOL revealed very good rotational stability and performance regarding predictability, efficacy, and safety in the correction of preexisting regular corneal astigmatism associated with cataract surgery. PMID:26855559

  20. Refractive cylinder outcomes after calculating toric intraocular lens cylinder power using total corneal refractive power

    Directory of Open Access Journals (Sweden)

    Davison JA

    2015-08-01

    Full Text Available James A Davison,1 Richard Potvin21Wolfe Eye Clinic, Marshalltown, IA, USA; 2Science in Vision, Akron, NY, USAPurpose: To determine whether the total corneal refractive power (TCRP value, which is based on measurement of both anterior and posterior corneal astigmatism, is effective for toric intraocular lens (IOL calculation with AcrySof® Toric IOLsPatients and methods: A consecutive series of cataract surgery cases with AcrySof toric IOL implantation was studied retrospectively. The IOLMaster® was used for calculation of IOL sphere, the Pentacam® TCRP 3.0 mm apex/ring value was used as the keratometry input to the AcrySof Toric IOL Calculator and the VERION™ Digital Marker for surgical orientation. The keratometry readings from the VERION reference unit were recorded but not used in the actual calculation. Vector differences between expected and actual residual refractive cylinder were calculated and compared to simulated vector errors using the collected VERION keratometry data.Results: In total, 83 eyes of 56 patients were analyzed. Residual refractive cylinder was 0.25 D or lower in 58% of eyes and 0.5 D or lower in 80% of eyes. The TCRP-based calculation resulted in a statistically significantly lower vector error (P<0.01 and significantly more eyes with a vector error ≤0.5 D relative to the VERION-based calculation (P=0.02. The TCRP and VERION keratometry readings suggested a different IOL toric power in 53/83 eyes. In these 53 eyes the TCRP vector error was lower in 28 cases, the VERION error was lower in five cases, and the error was equal in 20 cases. When the anterior cornea had with-the-rule astigmatism, the VERION was more likely to suggest a higher toric power and when the anterior cornea had against-the-rule astigmatism, the VERION was less likely to suggest a higher toric power.Conclusion: Using the TCRP keratometry measurement in the AcrySof toric calculator may improve overall postoperative refractive results

  1. Outcomes of excimer laser enhancements in pseudophakic patients with multifocal intraocular lens

    Directory of Open Access Journals (Sweden)

    Schallhorn SC

    2016-04-01

    Full Text Available Steven C Schallhorn,1–3 Jan A Venter,2 David Teenan,2 Julie M Schallhorn,3 Keith A Hettinger,2 Stephen J Hannan,2 Martina Pelouskova2 1Department of Ophthalmology, University of California, San Francisco, CA, USA; 2Optical Express, Glasgow, UK; 3Department of Ophthalmology, University of Southern California, Los Angeles, CA, USA Purpose: The aim of this study was to assess visual and refractive outcomes of laser vision correction (LVC to correct residual refraction after multifocal intraocular lens (IOL implantation. Patients and methods: In this retrospective study, 782 eyes that underwent LVC to correct unintended ametropia after multifocal IOL implantation were evaluated. Of all multifocal lenses implanted during primary procedure, 98.7% were refractive and 1.3% had a diffractive design. All eyes were treated with VISX STAR S4 IR excimer laser using a convectional ablation profile. Refractive outcomes, visual acuities, patient satisfaction, and quality of life were evaluated at the last available visit. Results: The mean time between enhancement and last visit was 6.3±4.4 months. Manifest spherical equivalent changed from -0.02±0.83 D (-3.38 D to +2.25 D pre-enhancement to 0.00±0.34 D (-1.38 D to +1.25 D post-enhancement. At the last follow-up, the percentage of eyes within 0.50 D and 1.00 D of emmetropia was 90.4% and 99.5%, respectively. Of all eyes, 74.9% achieved monocular uncorrected distance visual acuity 20/20 or better. The mean corrected distance visual acuity remained the same before (-0.04±0.06 logMAR [logarithm of the minimum angle of resolution] and after LVC procedure (-0.04±0.07 logMAR; P=0.70. There was a slight improvement in visual phenomena (starburst, halo, glare, ghosting/double vision following the enhancement. No sight-threatening complications related to LVC occurred in this study. Conclusion: LVC in pseudophakic patients with multifocal IOL was safe, effective, and predictable in a large cohort of

  2. Visual Outcomes, Patient Satisfaction and Spectacle Independence with a Trifocal Diffractive Intraocular Lens

    Science.gov (United States)

    Kretz, Florian Tobias Alwin; Choi, Chul Young; Müller, Matthias; Gerl, Matthias; Gerl, Ralf Helmar

    2016-01-01

    Purpose To evaluate visual outcomes following implantation of a trifocal diffractive intraocular lens (IOL) and to analyze their correlation with patient satisfaction and ease of performing daily tasks. Methods This was a prospective study enrolling 100 eyes of 50 patients undergoing cataract surgery with implantation of trifocal IOL AT LISA tri 839MP. Visual and refractive outcomes were evaluated during a 3-month follow-up. Postoperatively, a questionnaire was used to evaluate patient satisfaction with regard to surgical outcome, spectacle independence, perception of photic phenomena, and ease of performing some vision-related activities. Results A total of 91%, 87%, and 79% of eyes achieved a monocular uncorrected distance, near, and intermediate visual acuity of 0.1 logarithm of the minimum angle of resolution or better, respectively. After the surgery, 96% of the patients could perform their daily activities without problems. The mean spectacle independence scores for reading, doing computer work, and for distance were 10.33 ± 12.47, 5.71 ± 11.90, and 3.92 ± 9.77, respectively (scale: 0 = no spectacles needed; 40 = spectacles always needed). No correlation was found between spectacle independence and visual outcome (-0.101 ≤ r ≤ 0.244, p ≥ 0.087). Mean scores (0 = no symptoms; 40 = strong symptoms) for glare at night, ghost images, and halos were 15.15 ± 12.02, 4.49 ± 7.92, and 13.34 ± 10.82, respectively. No correlation was found between photic phenomena and visual outcome (-0.199 ≤ r ≤ 0.209, p ≥ 0.150). A total of 80% of patients reported satisfaction with the surgery outcome, and 86% would recommend the surgery to friends and family. Conclusions Implantation of the AT LISA tri 839MP IOL after cataract surgery provides effective visual restoration associated with a minimal level of photic phenomena, a positive impact on the performance of vision-related daily activities, and a high level of postoperative patient satisfaction. PMID:27247517

  3. Refractive Results: Safety and Efficacy of Secondary Piggyback Sensar™ AR40 Intraocular Lens Implantation to Correct Pseudophakic Refractive Error

    Science.gov (United States)

    Hassan, Alahmady Hamad Alsmman; Sayed, Khulood M.; ElAgooz, Mohammed; Elhawary, Ashraf Mostafa

    2016-01-01

    In this study we evaluate the visual outcomes, safety, efficacy, and stability of implanting of second sulcus intraocular lens (IOL) to correct unsatisfied ametropic patients after phacoemulsification. Methods. Retrospective study of 15 eyes (15 patients) underwent secondary intraocular lens implanted into the ciliary sulcus. The IOL used was a Sensar IOL three-piece foldable hydrophobic acrylic IOL. The first IOL in all patients was acrylic intrabagal IOL implanted in uncomplicated phacoemulsification surgery. Results. Fifteen eyes (15 patients) were involved in this study. Preoperatively, mean log⁡MAR UDVA and CDVA were 0.88 ± 0.22 and 0.19 ± 0.13, respectively, with a mean follow-up of 28 months (range: 24 to 36 months). At the end of the follow-up, all eyes achieved log⁡MAR UDVA of 0.20 ± 0.12 with postoperative refraction ranging from 0.00 to −0.50 D of attempted emmetropia. Conclusions. Implantation of the second sulcus SensarAR40 IOL was found to be safe, easy, and simple technique for management of ametropia following uncomplicated phacoemulsification. PMID:27313869

  4. A study regarding efficacy of various intraocular lens power calculation formulas in a subset of Indian myopic population

    Directory of Open Access Journals (Sweden)

    Ashish Mitra

    2014-01-01

    Full Text Available Efficacy of intraocular lens power calculation formulas in a subset of Indian myopic population. Retrospectively reviewed 43 patients who underwent phacoemulsification with high axial length (AL (>24.5 mm, range 24.75-32.35 mm. The power of the implanted intraocular lens (IOL was used to calculate the predicted post-operative refractive error by four formulas: Sanders-Retzlaff-Kraff (SRK II, SRK/T, Holladay 1, and Hoffer Q. The predictive accuracy of the formulas was analyzed by comparing the difference between the "actual" and "predicted" postoperative refractive errors. Repeated measures analysis of variance (ANOVA tests were done to have pair-wise comparisons between the formulas and P < 0.05 was considered significant. A subcategory of axial length 24.5-26.5 mm was also tested. Holladay 1, Hoffer Q and SRK/T formulas showed a slight tendency toward resultant hyperopia, with mean error of +0.24 diopters (D, +0.58 D, and +0.92 D, respectively. The Holladay 1 formula provided the best predictive result overall.

  5. Visual Performance after Bilateral Implantation of a Four-Haptic Diffractive Toric Multifocal Intraocular Lens in High Myopes.

    Science.gov (United States)

    Chang, John S M; Chan, Vincent K C; Ng, Jack C M; Law, Antony K P

    2016-01-01

    Background. The vision with diffractive toric multifocal intraocular lenses after cataract surgery in long eyes has not been studied previously. Objectives. To report visual performance after bilateral implantation of a diffractive toric multifocal intraocular lens in high myopes. Methods. Prospective, observational case series to include patients with axial length of ≥26 mm and corneal astigmatism of >1 dioptre who underwent bilateral AT LISA 909M implantation. Postoperative examinations included photopic and mesopic distance, intermediate, and near visual acuity; photopic contrast sensitivity; visual symptoms (0-5); satisfaction (1-5); and spectacle independence rate. Results. Twenty-eight eyes (14 patients) were included. Postoperatively, mean photopic monocular uncorrected distance, intermediate, and near visual acuities (logMAR) were 0.12 ± 0.20 (standard deviation), 0.24 ± 0.16, and 0.29 ± 0.21, respectively. Corresponding binocular values were -0.01 ± 0.14, 0.13 ± 0.12, and 0.20 ± 0.19, respectively. One eye (4%) had one-line loss in vision. Under mesopic condition, intermediate vision and near vision decreased significantly (all P ≤ 0.001). Contrast sensitivity at all spatial frequencies did not improve significantly under binocular condition (all P > 0.05). Median scores for halos, night glare, starbursts, and satisfaction were 0.50, 0.00, 0.00, and 4.25, respectively. Ten patients (71%) reported complete spectacle independence. Conclusions. Bilateral implantation of the intraocular lens in high myopes appeared to be safe and achieved good visual performance and high satisfaction. PMID:27563460

  6. Visual Performance after Bilateral Implantation of a Four-Haptic Diffractive Toric Multifocal Intraocular Lens in High Myopes

    Science.gov (United States)

    Chan, Vincent K. C.

    2016-01-01

    Background. The vision with diffractive toric multifocal intraocular lenses after cataract surgery in long eyes has not been studied previously. Objectives. To report visual performance after bilateral implantation of a diffractive toric multifocal intraocular lens in high myopes. Methods. Prospective, observational case series to include patients with axial length of ≥26 mm and corneal astigmatism of >1 dioptre who underwent bilateral AT LISA 909M implantation. Postoperative examinations included photopic and mesopic distance, intermediate, and near visual acuity; photopic contrast sensitivity; visual symptoms (0–5); satisfaction (1–5); and spectacle independence rate. Results. Twenty-eight eyes (14 patients) were included. Postoperatively, mean photopic monocular uncorrected distance, intermediate, and near visual acuities (logMAR) were 0.12 ± 0.20 (standard deviation), 0.24 ± 0.16, and 0.29 ± 0.21, respectively. Corresponding binocular values were −0.01 ± 0.14, 0.13 ± 0.12, and 0.20 ± 0.19, respectively. One eye (4%) had one-line loss in vision. Under mesopic condition, intermediate vision and near vision decreased significantly (all P ≤ 0.001). Contrast sensitivity at all spatial frequencies did not improve significantly under binocular condition (all P > 0.05). Median scores for halos, night glare, starbursts, and satisfaction were 0.50, 0.00, 0.00, and 4.25, respectively. Ten patients (71%) reported complete spectacle independence. Conclusions. Bilateral implantation of the intraocular lens in high myopes appeared to be safe and achieved good visual performance and high satisfaction. PMID:27563460

  7. Visual Performance after Bilateral Implantation of a Four-Haptic Diffractive Toric Multifocal Intraocular Lens in High Myopes.

    Science.gov (United States)

    Chang, John S M; Chan, Vincent K C; Ng, Jack C M; Law, Antony K P

    2016-01-01

    Background. The vision with diffractive toric multifocal intraocular lenses after cataract surgery in long eyes has not been studied previously. Objectives. To report visual performance after bilateral implantation of a diffractive toric multifocal intraocular lens in high myopes. Methods. Prospective, observational case series to include patients with axial length of ≥26 mm and corneal astigmatism of >1 dioptre who underwent bilateral AT LISA 909M implantation. Postoperative examinations included photopic and mesopic distance, intermediate, and near visual acuity; photopic contrast sensitivity; visual symptoms (0-5); satisfaction (1-5); and spectacle independence rate. Results. Twenty-eight eyes (14 patients) were included. Postoperatively, mean photopic monocular uncorrected distance, intermediate, and near visual acuities (logMAR) were 0.12 ± 0.20 (standard deviation), 0.24 ± 0.16, and 0.29 ± 0.21, respectively. Corresponding binocular values were -0.01 ± 0.14, 0.13 ± 0.12, and 0.20 ± 0.19, respectively. One eye (4%) had one-line loss in vision. Under mesopic condition, intermediate vision and near vision decreased significantly (all P ≤ 0.001). Contrast sensitivity at all spatial frequencies did not improve significantly under binocular condition (all P > 0.05). Median scores for halos, night glare, starbursts, and satisfaction were 0.50, 0.00, 0.00, and 4.25, respectively. Ten patients (71%) reported complete spectacle independence. Conclusions. Bilateral implantation of the intraocular lens in high myopes appeared to be safe and achieved good visual performance and high satisfaction.

  8. 人工晶体眼异常眩光幻影的研究进展%Research Progress in Pseudophakic Dysphotopsia Associated with Intraocular Lens

    Institute of Scientific and Technical Information of China (English)

    吴来伟

    2011-01-01

    Dysphotopsia ( glare, halos and shadows ) associated with intraocular lenses can degrade the visual performance following cataract surgery. Pseudophakic dysphotopsia is caused by four factors, including intraocular lens design, surgical factors, patient physical factors, and central adaptation. Positive dysphotopsia can be minimized by a larger optic, textured intraocular lens edge, optiEdge edge, and lower posterior capsule opacification. Besides, incision location, and iris - intraocular lens distance may play an important role in negative dysphotopsia. For the treatment of dysphotopsia,six months of clinical observation is necessary. Patients with severe and persistent dysphotopsia need to replace intraocular lens or to implant a piggyback intraocular lens in the ciliary sulcus.%白内障术后发生的眩光、光晕、阴影等眩光幻影问题成为影响视觉质量的重要因素.影响人工晶体眼眩光幻影的因素有晶体设计、手术因素、患者生理因素和心理适应.预防后发性白内障、晶体边缘纹理化、采用前圆后方边缘设计、使用更大的晶体光学面可以减少正像眩光幻影的发生.而手术切口位置和虹膜-晶体间距等可能是负像眩光幻影产生的影响因素.对于眩光幻影的治疗,6个月的临床观察是必要的,症状严重且持续者可考虑晶体置换或睫状沟植入另一枚驼背式人工晶体.

  9. Management of mydriasis and pain in cataract and intraocular lens surgery: review of current medications and future directions

    Directory of Open Access Journals (Sweden)

    Grob SR

    2014-07-01

    Full Text Available Seanna R Grob,1–3 Luis A Gonzalez-Gonzalez,1–3 Mary K Daly1,2,4 1Department of Ophthalmology, Veterans Administration Boston Healthcare System, Boston, MA, USA; 2Department of Ophthalmology, Harvard Medical School, Boston, MA, USA; 3Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Boston, MA, USA; 4Department of Ophthalmology, Boston University School of Medicine, Boston, MA, USA Abstract: The maintenance of mydriasis and the control of postoperative pain and ­inflammation are critical to the safety and success of cataract and intraocular lens replacement surgery. Appropriate mydriasis is usually achieved by topical and/or intracameral administration of anticholinergic agents, sympathomimetic agents, or both, with the most commonly used being cyclopentolate, tropicamide, and phenylephrine. Ocular inflammation is common after cataract surgery. Topical steroids and nonsteroidal anti-inflammatory drugs are widely used because they have been proved effective to control postsurgical inflammation and decrease pain. Topical nonsteroidal anti-inflammatory drugs have also been shown to help maintain dilation. However, use of multiple preoperative drops for pupil dilation, inflammation, and pain control have been shown to be time consuming, resulting in delays to the operating room, and they cause dissatisfaction among perioperative personnel; their use can also be associated with systemic side effects. Therefore, ophthalmologists have been in search of new options to streamline this process. This article will review the current medications commonly used for intraoperative mydriasis, as well as pain and inflammation control. In addition, a new combination of ketorolac, an anti-inflammatory agent, and phenylephrine, a mydriatic agent has recently been designed to maintain intraoperative mydriasis and to reduce postoperative pain and irritation from intraocular lens replacement surgery. Two Phase III clinical trials evaluating this

  10. Comparison of visual outcomes and subjective visual quality after bilateral implantation of a diffractive trifocal intraocular lens and blended implantation of apodized diffractive bifocal intraocular lenses

    Science.gov (United States)

    Gundersen, Kjell Gunnar; Potvin, Rick

    2016-01-01

    Purpose To compare the visual acuity (VA) and quality of vision between bilateral implantation of a trifocal intraocular lens (IOL) and blended bifocal IOLs with an intermediate add in the dominant eye and a near add in the nondominant eye. Patients and methods Patients with either trifocal or blended bifocal IOLs implanted were recruited after surgery. Subjects returned for a single diagnostic visit between 3 and 24 months after surgery. VA was tested at various distances, including low-contrast acuity and acuity at their preferred reading distance. A binocular defocus curve was obtained, and subjective visual function and quality of vision were evaluated. Results Twenty-five trifocal subjects and 30 blended bifocal subjects were enrolled. There were no significant differences in low-contrast acuity, preferred reading distance, or acuity at that reading distance. Binocular vision at 4 m, 60 cm, and 40 cm was not statistically significantly different. The trifocal provided statistically significantly better visual acuity (P<0.05) at vergences from −0.5 to −1.5 D (from 2 m to 67 cm viewing distance, P<0.05). There was no statistically significant difference in the near vision subscale scores of the 39-question National Eye Institute Visual Function Questionnaire or the overall scores of the Quality of Vision questionnaire, though significantly more trifocal subjects reported that the observed visual disturbances were “bothersome” (P<0.05). Conclusion Both lens modalities provided subjects with excellent binocular near and distance vision, with similar low rates of visual disturbances and good reported functional vision. The trifocal IOL provided significantly better intermediate VA in the viewing distance range of 2 m to 67 cm, corresponding to viewing things such as a car dashboard or grocery shelf. VA was similar between groups at viewing distances from 60 to 40 cm, corresponding to computer or reading distance. PMID:27274184

  11. Comparison of visual outcomes and subjective visual quality after bilateral implantation of a diffractive trifocal intraocular lens and blended implantation of apodized diffractive bifocal intraocular lenses

    Science.gov (United States)

    Gundersen, Kjell Gunnar; Potvin, Rick

    2016-01-01

    Purpose To compare the visual acuity (VA) and quality of vision between bilateral implantation of a trifocal intraocular lens (IOL) and blended bifocal IOLs with an intermediate add in the dominant eye and a near add in the nondominant eye. Patients and methods Patients with either trifocal or blended bifocal IOLs implanted were recruited after surgery. Subjects returned for a single diagnostic visit between 3 and 24 months after surgery. VA was tested at various distances, including low-contrast acuity and acuity at their preferred reading distance. A binocular defocus curve was obtained, and subjective visual function and quality of vision were evaluated. Results Twenty-five trifocal subjects and 30 blended bifocal subjects were enrolled. There were no significant differences in low-contrast acuity, preferred reading distance, or acuity at that reading distance. Binocular vision at 4 m, 60 cm, and 40 cm was not statistically significantly different. The trifocal provided statistically significantly better visual acuity (Pdashboard or grocery shelf. VA was similar between groups at viewing distances from 60 to 40 cm, corresponding to computer or reading distance. PMID:27274184

  12. 人工晶状体睫状沟缝线固定术的临床观察%Clinical observation of ciliary sulcus fixation of intraocular lens

    Institute of Scientific and Technical Information of China (English)

    郑丁瑞

    2012-01-01

    Objective To explore the clinical efficacy of ciliary sulcus fixation of intraocular lens (IOL).Methods 15 cases ( 15 eyes) underwent sulcus fixation of posterior chamber IOL.The visual acuities,intraoperative and postoperative complications were observed.Results Postoperative corrected visual acuities:6 eyesat ≥0.5,8 eyesat0.2 ~0.4,1 eye at0.1.Conclusion Sulcus fixation of IOLis a reliable technique to treat complicated surgeries.%目的 探讨人工晶状体睫状沟缝线固定术的临床效果.方法 后房型人工晶状体(IOL)睫状沟缝线固定术15例(15眼),观察临床效果及术中、术后,近期、远期并发症.结果 术后矫正视力≥0.5者6眼,0.2 ~0.4者8眼,0.1者1眼.结论 人工晶状体睫状沟缝线固定术为特殊情况下的人工晶状体植入提供了一个可靠的固定方法.

  13. Effect of Co-Implantation of a Capsular Tension Ring on Clinical Outcomes after Cataract Surgery with Monofocal Intraocular Lens Implantation

    Science.gov (United States)

    Park, Hyun Ju; Lee, Hun; Kim, Do Wook; Kim, Eung Kweon; Seo, Kyoung Yul

    2016-01-01

    Purpose The objective was to evaluate the effect of co-implantation of a preloaded capsular tension ring (CTR) and aberration-free monofocal intraocular lens (IOL) on clinical outcomes and visual quality after cataract surgery. Materials and Methods Patients who underwent cataract surgery were randomized into two groups that were implanted with a CTR and IOL (group 1, 26 eyes) or an IOL only (group 2, 26 eyes). At 1 and 3 months after surgery, visual acuity, refractive errors, refractive prediction errors, ocular aberrations, and modulation transfer function (MTF) were analyzed. At 3 months postoperatively, anterior chamber depth (ACD) and contrast sensitivity were evaluated. Results Group 1 showed greater hyperopic shift, which caused the refractive prediction error at 3 months after surgery to be significantly different between the two groups (p=0.049). Differences in ACD between the preoperative and postoperative periods tended to be greater in group 1 than in group 2. At 3 months postoperatively, internal MTF values at 20, 25, and 30 cycles per degree were significantly better in group 1 than in group 2 (p=0.034, 0.017, and 0.017, respectively). Contrast sensitivity showed comparable results at almost all spatial frequencies between the groups. Conclusion Regarding visual acuity and quality, both groups showed comparable results. Co-implantation of a CTR and aberration-free monofocal IOL was associated with hyperopic refractive outcomes. Surgeons should consider the position of the IOL when planning co-implantation of a CTR and IOL. PMID:27401657

  14. A Comparison of Clinical Outcomes of Dislocated Intraocular Lens Fixation between In Situ Refixation and Conventional Exchange Technique Combined with Vitrectomy

    Science.gov (United States)

    Eum, Sun Jung; Kim, Myung Jun; Kim, Hong Kyun

    2016-01-01

    Purpose. To evaluate surgical efficacy of in situ refixation technique for dislocated posterior chamber intraocular lens (PCIOL). Methods. This was a single-center retrospective case series. 34 patients (34 eyes) who underwent sclera fixation for dislocated IOLs combined with vitrectomy were studied. Of 34 eyes, 17 eyes underwent IOL exchange and the other 17 eyes underwent in situ refixation. Results. Mean follow-up period was 6 months. Mean logMAR best corrected visual acuity (BCVA) was not significantly different between the groups 6 months after surgery (0.10 ± 0.03 in the IOL exchange group and 0.10 ± 0.05 in the refixation group; p = 0.065). Surgically induced astigmatism (SIA) was significantly lower in the refixation group (0.79 ± 0.41) than in the IOL exchange group (1.29 ± 0.46) (p = 0.004) at 3 months, which persisted to 6 months (1.13 ± 0.18 in the IOL exchange group and 0.74 ± 0.11 in the refixation group; p = 0.006). Postoperative complications occurred in 3 eyes in the IOL exchange group (17.6%) and 2 eyes in the refixation group (11.8%). However, all of the patients were well managed without additional surgery. Conclusion. The in situ refixation technique should be preferentially considered if surgery is indicated since it seemed to produce a sustained less SIA compared to IOL exchange. PMID:27119019

  15. A Comparison of Clinical Outcomes of Dislocated Intraocular Lens Fixation between In Situ Refixation and Conventional Exchange Technique Combined with Vitrectomy

    Directory of Open Access Journals (Sweden)

    Sun Jung Eum

    2016-01-01

    Full Text Available Purpose. To evaluate surgical efficacy of in situ refixation technique for dislocated posterior chamber intraocular lens (PCIOL. Methods. This was a single-center retrospective case series. 34 patients (34 eyes who underwent sclera fixation for dislocated IOLs combined with vitrectomy were studied. Of 34 eyes, 17 eyes underwent IOL exchange and the other 17 eyes underwent in situ refixation. Results. Mean follow-up period was 6 months. Mean logMAR best corrected visual acuity (BCVA was not significantly different between the groups 6 months after surgery (0.10±0.03 in the IOL exchange group and 0.10±0.05 in the refixation group; p=0.065. Surgically induced astigmatism (SIA was significantly lower in the refixation group (0.79±0.41 than in the IOL exchange group (1.29±0.46 (p=0.004 at 3 months, which persisted to 6 months (1.13±0.18 in the IOL exchange group and 0.74±0.11 in the refixation group; p=0.006. Postoperative complications occurred in 3 eyes in the IOL exchange group (17.6% and 2 eyes in the refixation group (11.8%. However, all of the patients were well managed without additional surgery. Conclusion. The in situ refixation technique should be preferentially considered if surgery is indicated since it seemed to produce a sustained less SIA compared to IOL exchange.

  16. Effect of aspherical and yellow tinted intraocular lens on blue-on-yellow perimetry Efeito das lentes intraoculares asféricas e com pigmentação amarela na campimetria azul-amarelo

    Directory of Open Access Journals (Sweden)

    Rodrigo França de Espíndola

    2012-10-01

    Full Text Available PURPOSE: To investigate the possible effect of aspherical or yellow tinted intraocular lens (IOL on contrast sensitivity and blue-on-yellow perimetry. METHODS: This prospective randomized bilateral double-masked clinical study included 52 patients with visually significant bilateral cataracts divided in two groups; 25 patients (50 eyes received aspherical intraocular lens in one eye and spherical intraocular lens in the fellow eye; and 27 patients (54 eyes received ultraviolet and blue light filter (yellow tinted IOL implantation in one eye and acrylic ultraviolet filter IOL in the fellow eye. The primary outcome measures were contrast sensitivity and blue-on-yellow perimetry values (mean deviation [MD] and pattern standard deviation [PSD] investigated two years after surgery. The results were compared intra-individually. RESULTS: There was a statistically significant between-group (aspherical and spherical intraocular lens difference in contrast sensitivity under photopic conditions at 12 cycles per degree and under mesopic conditions at all spatial frequencies. There were no between-group significant differences (yellow tinted and clear intraocular lens under photopic or mesopic conditions. There was no statistically significant difference between all intraocular lens in MD or PSD. CONCLUSION: Contrast sensitivity was better under mesopic conditions with aspherical intraocular lens. Blue-on-yellow perimetry did not appear to be affected by aspherical or yellow tinted intraocular lens. Further studies with a larger sample should be carried out to confirm or not that hypotheses.OBJETIVO: Investigar a possibilidade de efeitos na sensibilidade ao contraste e nos resultados da campimetria azul-amarelo com implante de uma lente intraocular (LIO asférica ou de pigmentação amarela. MÉTODOS: Trata-se de um estudo prospectivo, randomizado, duplo-mascarado, envolvendo 52 pacientes portadores de catarata senil bilateral, divididos em dois grupos; 25

  17. Clinical Application of Aspheric Intraocular Lens%浅谈非球面人工晶状体的临床应用

    Institute of Scientific and Technical Information of China (English)

    许玉梅

    2016-01-01

    目的:通过非球面人工晶状体植入术后视功能的变化,观察治疗效果,提出治疗建议,客观评价非球面人工晶状体的临床作用。方法从眼球面像差的特性,非球面人工晶状体的设计及矫正目标,非球面人工晶状体临床应用注意事项,非球面人工晶状体的视觉质量评价等方面进行分析。结果虽然非球面人工晶状体眼术后的高阶像差低于球面人工晶状体,但其视力和对比敏感度的结果并不完全与之相对应。由于目前我们对人眼波前像差的认识还不够深入,检测仪器不够完善,各阶像差与视功能之间的关系尚需进一步的研究。结论正常瞳孔下非球面人工晶状体眼与球面人工晶状体眼相比,非球面人工晶体可以有效减少球面像差,提高部分空间频率的对比敏感度,使患者拥有更好地视觉质量,但其不能体现减少术眼后高阶像差的优势。%Objective Through the changes of visual function after implantation of aspheric intraocular lens(IOL)observed treatment effect,treatment recommendations,and objective evaluation of non spherical intraocular lens(IOL)clinical effect. MethodsFrom the ocular wavefront aberration characteristics,the design of aspheric intraocular lens and correctional goal and clinical application of aspheric intraocular lenses note,aspheric intraocular lens visual quality evaluation were analyzed.Results Although the high order aberrations of the patients with non spherical intraocular lens were lower than that of the spherical intraocular lens,the visual acuity and contrast sensitivity were not completely corresponding with the results. Because at present we of wavefront aberration of understanding is not deep enough,detection equipment is not perfect,aberration and depending on the relationship between function stil need to further study.Conclusion With normal pupil non compared to spherical intraocular lens eyes and spherical

  18. Professor Peter Choyce: an early pioneer of intraocular lenses and corneal/refractive surgery.

    Science.gov (United States)

    Pandey, Suresh K; Apple, David J

    2005-06-01

    Professor Peter Choyce, FRCS, DOMS, MS, was one of the pioneers of intraocular lens implant surgery. He developed an interest in artificial lens implantation following cataract surgery, a procedure that was widely criticized by the ophthalmic establishment in the UK, Europe, North America and other countries. Owing to the opposition to the intraocular lenses, Peter Choyce together with Sir Harold Ridley co-founded the International Intraocular Implant Club in 1966, which was responsible for the gradual acceptance of artificial lens implantation. Peter Choyce developed several models of intraocular lens, but did not patent the majority of them. The Choyce Mark IX, manufactured by Rayner Intraocular Lenses, became the first US Food and Drug Administration-approved intraocular lens in 1981. A review of Peter Choyce's record confirms a significant number of original innovations in the field of anterior segment surgery, including many procedures taken for granted today, but not associated with his name. These include early work on both kerato- and intraocular lens-refractive procedures, keratoprosthesis, pioneering paediatric implant procedures and others. Unfortunately his tenacious adherence to anterior chamber lens technology, while in general clinically sound, caused many to question his influence and hence he remained poorly understood even until after his death. He passed away on 8 August 2001 after a long fight with colon cancer. In this article, we provide evidence and elaborate Peter Choyce's accomplishments, which places him as one of the most innovative ophthalmologist in his surgical field in the twentieth century.

  19. Capsule Contraction Syndrome with a Microincision Foldable Hydrophilic Acrylic Intraocular Lens: Two Case Reports and Review of the Literature

    Directory of Open Access Journals (Sweden)

    Angelo Balestrazzi

    2014-10-01

    Full Text Available Here we present 2 cases of capsule contraction syndrome (CCS. In both cases, a hydrophilic acrylic Akreos MI60 (Bausch and Lomb intraocular lens (IOL was implanted in the capsular bag through microincision cataract surgery, and the literature on the subject is reviewed. Since CCS has been described after the implantation of every IOL type, it is unlikely that the Akreos MI60 chemical and physical properties may cause CCS. When CCS occurs with IOLs composed of increasingly flexible materials that are inserted through incisions of decreasing size, a severe dislocation and deformation of IOL optics and haptics may develop. In both cases illustrated here, Nd:YAG laser anterior capsulotomy was highly effective. Hence, also based on the literature, which reports severe complications as a result of surgical intervention, it is suggested that Nd:YAG laser anterior capsulotomy be the first line of CCS treatment when the luxation of an IOL capsular bag is absent.

  20. Dislocation of polyfocal full-optics accommodative intraocular lens after neodymium-doped yttrium aluminum garnet capsulotomy in vitrectomized eye

    Directory of Open Access Journals (Sweden)

    Kyung Tae Kang

    2013-01-01

    Full Text Available We report a case of dislocation of WIOL-CF® polyfocal full-optics intraocular lens (IOL after neodymium-doped yttrium aluminum garnet (Nd: YAG laser capsulotomy in the vitrectomized eye. At 22 months before the dislocation of the IOL, a 55-year-old male patient underwent phacoemulsification with WIOL-CF® IOL implantation in a local clinic and 10 months after the cataract surgery the patient underwent pars plana vitrectomy, endolaser photocoagulation and 14% C 3 F 8 gas tamponade for the treatment of rhegmatogenous retinal detachment. At 9 months after the vitrectomy, the patient visited our clinic for a sudden decrease of vision after Nd: YAG capsulotomy in the local clinic. On fundus examination, the dislocated IOL was identified and the Nd: YAG capsulotomy site and the larger break, which is suspected to have been a route of the dislocation were observed in the posterior capsule.

  1. Comparison between Limbal and Pars Plana Approaches Using Microincision Vitrectomy for Removal of Congenital Cataracts with Primary Intraocular Lens Implantation

    Science.gov (United States)

    Liu, Xin; Zheng, Tianyu; Zhou, Xingtao; Lu, Yi; Zhou, Peng; Fan, Fan; Luo, Yi

    2016-01-01

    Purpose. To compare the surgical outcomes of limbal versus pars plana vitrectomy using the 23-gauge microincision system for removal of congenital cataracts with primary intraocular lens implantation. Methods. We retrospectively reviewed all eyes that underwent cataract removal through limbal or pars plana incision. Main outcome measures included visual outcomes and complications. Results. We included 40 eyes (26 patients) in the limbal group and 41 eyes (30 patients) in the pars plana group. The mean age was 46 months. There was no significant difference in best-corrected visual acuity between the two groups (P = 0.64). Significantly, more eyes had at least one intraoperative complication in the limbal group than in the pars plana group (P = 0.03) that were mainly distributed at 1.5–3 years of age (P = 0.01). The most common intraoperative complications were iris aspiration, iris prolapse, and iris injury. More eyes in the limbal group had postoperative complications and required additional intraocular surgery, but the difference was not significant (P = 0.19). Conclusions. The visual results were encouraging in both approaches. We recommend the pars plana approach for lower incidence of complications. The limbal approach should be reserved for children older than 3 years of age and caution should be exercised to minimize iris disturbance. PMID:27313872

  2. Observations on the relationship between the levels of serum IL-6 and TNF-α and the severity of diabetic retinopathy and curative effect in cataract extraction with intraocular lens implantation in diabetics

    International Nuclear Information System (INIS)

    Objective: To determine the sequential changes of blood levels of interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) in diabetics with extracapsular extraction and posterior chamber intraocular lens implantation and to study their correlation with curative effects and pos-operative complications. Methods: The serum concentrations of IL-6 and TNF-α in 39 diabetics and non-diabetics were measured by radioimmunoassay at preoperative, post-operative and on days 7, 14 and 90 postoperatively. Results: There was significant difference in the levels of the two factors between the diabetic group and non-diabetic group preoperatively (P<0.05). The serum levels of the two factors in patients with proliferative diabetic retinopathy were higher than those in non-diabetic retinopathy, and simple diabetic retinopathy post-operative (P<0.01). Post-operative complication rate was higher in patients with proliferative diabetic retinopathy than those without retinopathy and those having simple diabetic retinopathy. Conclusion: The levels of the two factors correlate with complications and curative effect of patients with proliferative diabetic retinopathy undergoing intraocular lens implantation

  3. The impact of a preloaded intraocular lens delivery system on operating room efficiency in routine cataract surgery

    Science.gov (United States)

    Jones, Jason J; Chu, Jeffrey; Graham, Jacob; Zaluski, Serge; Rocha, Guillermo

    2016-01-01

    Purpose The aim of this study was to evaluate the operational impact of using preloaded intraocular lens (IOL) delivery systems compared with manually loaded IOL delivery processes during routine cataract surgeries. Methods Time and motion data, staff and surgery schedules, and cost accounting reports were collected across three sites located in the US, France, and Canada. Time and motion data were collected for manually loaded IOL processes and preloaded IOL delivery systems over four surgery days. Staff and surgery schedules and cost accounting reports were collected during the 2 months prior and after introduction of the preloaded IOL delivery system. Results The study included a total of 154 routine cataract surgeries across all three sites. Of these, 77 surgeries were performed using a preloaded IOL delivery system, and the remaining 77 surgeries were performed using a manual IOL delivery process. Across all three sites, use of the preloaded IOL delivery system significantly decreased mean total case time by 6.2%–12.0% (P<0.001 for data from Canada and the US and P<0.05 for data from France). Use of the preloaded delivery system also decreased surgeon lens time, surgeon delays, and eliminated lens touches during IOL preparation. Conclusion Compared to a manual IOL delivery process, use of a preloaded IOL delivery system for cataract surgery reduced total case time, total surgeon lens time, surgeon delays, and eliminated IOL touches. The time savings provided by the preloaded IOL delivery system provide an opportunity for sites to improve routine cataract surgery throughput without impacting surgeon or staff capacity. PMID:27382245

  4. 晶状体脱位微创玻璃体灌注人工晶状体缝线固定术%Microinvasive vitreous infusion combined with transscleral suture fixation of intraocular lens for lens luxation

    Institute of Scientific and Technical Information of China (English)

    郭乾乾; 冯文国

    2015-01-01

    Objective To investigate the surgical skills and complications of microivasive vitreous infusion combined with transscleral suture fixation of intraocular lens for lens luxation.Methods Eight eye of 8 cases of lens luxation received vitreous infusion combined with intraocular lens suspension.The patients were followed up for 3-6 months,and the clinical efficacy was good.Results The intraocular lens was fixed to sulcus successfully in all eight cases and was in right position.The postoperative visual acuity was improved obviously,and no serious complications occurred.Conclusion Microinvasive vitreous infusion combined with primary intraocular lens suspension surgery for severe luxation of lens is safe and effective,but the operation skills and operation indications should be paid attention to.%目的 探讨晶状体脱位微创玻璃体灌注联合一期人工晶状体睫状沟缝线固定术的技巧和并发症.方法 8例(8眼)晶状体脱位,行微创玻璃体灌注联合一期人工晶状体睫状沟缝线固定术,术后随访3~6个月,临床疗效良好.结果 8例均1次睫状沟缝线固定成功,术后人工晶状体位正,视力明显提高,未见严重并发症.结论 微创玻璃体灌注联合一期人工晶状体睫状沟缝线固定式术治疗晶状体脱位安全有效,但应注意适应证和术中手术技巧.

  5. Error induced by the estimation of the corneal power and the effective lens position with a rotationally asymmetric refractive multifocal intraocular lens

    Science.gov (United States)

    Piñero, David P.; Camps, Vicente J.; Ramón, María L.; Mateo, Verónica; Pérez-Cambrodí, Rafael J.

    2015-01-01

    AIM To evaluate the prediction error in intraocular lens (IOL) power calculation for a rotationally asymmetric refractive multifocal IOL and the impact on this error of the optimization of the keratometric estimation of the corneal power and the prediction of the effective lens position (ELP). METHODS Retrospective study including a total of 25 eyes of 13 patients (age, 50 to 83y) with previous cataract surgery with implantation of the Lentis Mplus LS-312 IOL (Oculentis GmbH, Germany). In all cases, an adjusted IOL power (PIOLadj) was calculated based on Gaussian optics using a variable keratometric index value (nkadj) for the estimation of the corneal power (Pkadj) and on a new value for ELP (ELPadj) obtained by multiple regression analysis. This PIOLadj was compared with the IOL power implanted (PIOLReal) and the value proposed by three conventional formulas (Haigis, Hoffer Q and Holladay I). RESULTS PIOLReal was not significantly different than PIOLadj and Holladay IOL power (P>0.05). In the Bland and Altman analysis, PIOLadj showed lower mean difference (-0.07 D) and limits of agreement (of 1.47 and -1.61 D) when compared to PIOLReal than the IOL power value obtained with the Holladay formula. Furthermore, ELPadj was significantly lower than ELP calculated with other conventional formulas (PLentis Mplus LS-312 can be optimized by minimizing the keratometric error and by estimating ELP using a mathematical expression dependent on anatomical factors. PMID:26085998

  6. Treatment of dystrophic calcification on a silicone intraocular lens with pars plana vitrectomy

    OpenAIRE

    Mehta N; Goldberg RA; Shah CP

    2014-01-01

    Nitish Mehta,1 Roger A Goldberg,2 Chirag P Shah21University of Massachusetts Medical School, Worcester, MA, USA; 2Department of Retina, Ophthalmic Consultants of Boston, Boston, Massachusetts, USAPurpose: Dense, vision-obscuring calcification on the posterior aspect of silicone intraocular lenses (IOLs) is often not amenable to neodymium:yttrium-aluminum-garnet capsulotomy, and, in prior reports, has required IOL exchange. We report the successful removal of dense calcium deposition on the po...

  7. The Impact of Multifocal Intraocular Lens in Retinal Imaging with Optical Coherence Tomography

    OpenAIRE

    Dias-Santos, A; Costa, L; Lemos, V; Anjos, R.; Vicente, A.(IFPA, Dep. AGO, Université de Liège, Bat B5, Sart-Tilman, B-4000, Liège 1, Belgium); Ferreira, J; Cunha, JP

    2015-01-01

    Multifocal intraocular lenses (MF IOLs) have concentric optical zones with different dioptric power, enabling patients to have good visual acuity at multiple focal points. However, several optical limitations have been attributed to this particular design. The purpose of this study is to access the effect of MF IOLs design on the accuracy of retinal optical coherence tomography (OCT). Cross-sectional study conducted at the Refractive Surgery Department of Central Lisbon Hospital Center. Twent...

  8. Modification of hydrophobic acrylic intraocular lens with poly(ethylene glycol) by atmospheric pressure glow discharge: A facile approach

    International Nuclear Information System (INIS)

    To improve the anterior surface biocompatibility of hydrophobic acrylic intraocular lens (IOL) in a convenient and continuous way, poly(ethylene glycol)s (PEGs) were immobilized by atmospheric pressure glow discharge (APGD) treatment using argon as the discharge gas. The hydrophilicity and chemical changes on the IOL surface were characterized by static water contact angle and X-ray photoelectron spectroscopy to confirm the covalent binding of PEG. The morphology of the IOL surface was observed under field emission scanning electron microscopy and atomic force microscopy. The surface biocompatibility was evaluated by adhesion experiments with platelets, macrophages, and lens epithelial cells (LECs) in vitro. The results revealed that the anterior surface of the PEG-grafted IOL displayed significantly and permanently improved hydrophilicity. Cell repellency was observed, especially in the PEG-modified IOL group, which resisted the attachment of platelets, macrophages and LECs. Moreover, the spread and growth of cells were suppressed, which may be attributed to the steric stabilization force and chain mobility effect of the modified PEG. All of these results indicated that hydrophobic acrylic IOLs can be hydrophilic modified by PEG through APGD treatment in a convenient and continuous manner which will provide advantages for further industrial applications.

  9. Modification of hydrophobic acrylic intraocular lens with poly(ethylene glycol) by atmospheric pressure glow discharge: A facile approach

    Energy Technology Data Exchange (ETDEWEB)

    Lin Lin; Wang Yao; Huang Xiaodan [Eye Center, Affiliated Second Hospital, College of Medicine, Zhejiang University, Hangzhou 310009 (China); Xu Zhikang [Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027 (China); Yao Ke, E-mail: xlren@zju.edu.cn [Eye Center, Affiliated Second Hospital, College of Medicine, Zhejiang University, Hangzhou 310009 (China)

    2010-10-01

    To improve the anterior surface biocompatibility of hydrophobic acrylic intraocular lens (IOL) in a convenient and continuous way, poly(ethylene glycol)s (PEGs) were immobilized by atmospheric pressure glow discharge (APGD) treatment using argon as the discharge gas. The hydrophilicity and chemical changes on the IOL surface were characterized by static water contact angle and X-ray photoelectron spectroscopy to confirm the covalent binding of PEG. The morphology of the IOL surface was observed under field emission scanning electron microscopy and atomic force microscopy. The surface biocompatibility was evaluated by adhesion experiments with platelets, macrophages, and lens epithelial cells (LECs) in vitro. The results revealed that the anterior surface of the PEG-grafted IOL displayed significantly and permanently improved hydrophilicity. Cell repellency was observed, especially in the PEG-modified IOL group, which resisted the attachment of platelets, macrophages and LECs. Moreover, the spread and growth of cells were suppressed, which may be attributed to the steric stabilization force and chain mobility effect of the modified PEG. All of these results indicated that hydrophobic acrylic IOLs can be hydrophilic modified by PEG through APGD treatment in a convenient and continuous manner which will provide advantages for further industrial applications.

  10. Comparison of visual outcomes and subjective visual quality after bilateral implantation of a diffractive trifocal intraocular lens and blended implantation of apodized diffractive bifocal intraocular lenses

    Directory of Open Access Journals (Sweden)

    Gundersen KG

    2016-05-01

    Full Text Available Kjell G Gundersen,1 Rick Potvin21IFocus Øyeklinikk AS, Haugesund, Norway; 2Science in Vision, Akron, NY, USAPurpose: To compare the visual acuity (VA and quality of vision between bilateral implantation of a trifocal intraocular lens (IOL and blended bifocal IOLs with an intermediate add in the dominant eye and a near add in the nondominant eye.Patients and methods: Patients with either trifocal or blended bifocal IOLs implanted were recruited after surgery. Subjects returned for a single diagnostic visit between 3 and 24 months after surgery. VA was tested at various distances, including low-contrast acuity and acuity at their preferred reading distance. A binocular defocus curve was obtained, and subjective visual function and quality of vision were evaluated.Results: Twenty-five trifocal subjects and 30 blended bifocal subjects were enrolled. There were no significant differences in low-contrast acuity, preferred reading distance, or acuity at that reading distance. Binocular vision at 4 m, 60 cm, and 40 cm was not statistically significantly different. The trifocal provided statistically significantly better visual acuity (P<0.05 at vergences from -0.5 to -1.5 D (from 2 m to 67 cm viewing distance, P<0.05. There was no statistically significant difference in the near vision subscale scores of the 39-question National Eye Institute Visual Function Questionnaire or the overall scores of the Quality of Vision questionnaire, though significantly more trifocal subjects reported that the observed visual disturbances were “bothersome” (P<0.05.Conclusion: Both lens modalities provided subjects with excellent binocular near and distance vision, with similar low rates of visual disturbances and good reported functional vision. The trifocal IOL provided significantly better intermediate VA in the viewing distance range of 2 m to 67 cm, corresponding to viewing things such as a car dashboard or grocery shelf. VA was similar between groups at

  11. Phakic posterior chamber intraocular lens implantation for myopic anisometropic amblyopia in adults%有晶状体眼后房型人工晶状体植入术治疗成人近视性屈光参差性弱视

    Institute of Scientific and Technical Information of China (English)

    石明华; 蒋海翔; 何晓阳; 周伟; 王静

    2014-01-01

    目的 研究有晶状体眼后房型人工晶状体又称可植入式接触镜(implantable contact lens,ICL)植入术治疗成人近视性屈光参差性弱视的效果和安全性.方法 2010年9月到2012年9月在汉口爱尔眼科医院行ICL植入术的伴有弱视的高度近视性屈光参差患者共11例,随访6个月以上.记录患者术前、术后裸眼视力、最佳矫正视力、眼压、角膜内皮细胞计数以及术后的Titmus立体视情况.结果 术前患者弱视眼平均屈光度为13.55 D(等效球镜),术后为0.33 D.术前最佳矫正视力为0.50±0.18,术后1周裸眼视力为0.72 ±0.23,末次随访时裸眼视力进一步提升到0.78±0.22,较术前最佳矫正视力平均提高2行,差异有显著统计学意义(t=-9.87,P<0.001).术前角膜内皮细胞计数为(2678±155)个·mm-2,术后1周为(2466±214)个·mm-2,末次随访时为(2410±142)个·mm-2.术后Titmus立体视检查2例斜视患者没有立体视,其他患者均有立体视,立体视为157″±102″.所有术眼术中、术后均未见严重并发症发生.结论 ICL植入术是治疗成人近视性屈光参差性弱视安全有效的方法,其能明显提高患者的视功能,改善患者的生活质量.

  12. Safety and effectiveness of a glistening-free single-piece hydrophobic acrylic intraocular lens (enVista

    Directory of Open Access Journals (Sweden)

    Packer M

    2013-09-01

    Full Text Available Mark Packer,1 Luther Fry,2 Kevin T Lavery,3 Robert Lehmann,4 James McDonald,5 Louis Nichamin,6 Brian Bearie,7,† Jon Hayashida,8 Griffith E Altmann,8 Omid Khodai8 1Department of Ophthalmology, Oregon Health and Science University, Eugene, OR, USA; 2University of Kansas Medical Center, Kansas City, KS, USA; 3Wayne State University, Detroit, MI, USA; 4Baylor College of Medicine, Houston, TX, USA; 5University of Arkansas for Medical Sciences, Little Rock, AR, USA; 6Laurel Eye Clinic, Brookville, PA, USA; 7Grand Rapids Eye Institute, Grand Rapids, MI, USA; 8Bausch & Lomb, Aliso Viejo, CA, USA †Brian Bearie passed away on March 9, 2011 Purpose: To evaluate the safety and effectiveness of a single-piece hydrophobic acrylic intraocular lens (IOL; enVista model MX60; Bausch & Lomb, Rochester, NY, USA when used to correct aphakia following cataract extraction in adults. Methods: This was a prospective case series (NCT01230060 conducted in private practices in the US. Eligible subjects were adult patients with age-related cataract amenable to treatment with standard phacoemulsification/extracapsular cataract extraction. With follow-up of 6 months, primary safety and effectiveness end points included the rates of US Food and Drug Administration (FDA-defined cumulative and persistent adverse events and the percentage of subjects who achieved best-corrected visual acuity (BCVA of 20/40 or better at final visit. To evaluate rotational stability, subjects were randomized (1:1:1:1 to have the lens implanted in one of four axis positions in 45° increments. Results: A total of 122 subjects were enrolled. The rate of cumulative and persistent adverse events did not significantly exceed historical controls, as per FDA draft guidance. At the final postoperative visit, all subjects (100% achieved a BCVA of 20/40 compared with the FDA historical control of 96.7%. Rotation of the IOL between the two final follow-up visits was ≤5° for 100% of eyes, and refractive

  13. 有晶状体眼后房型人工晶状体植入术矫正高度近视视觉质量评估%Visual quality after implantation of posterior chamber phakic intraocular lens for high myopia

    Institute of Scientific and Technical Information of China (English)

    吴燕; 罗涛; 蒋炜; 张衡頔; 赵雅静

    2014-01-01

    目的 评估有晶状体眼后房型人工晶状体(implantable contact lens,ICL)植入术矫正高度近视后视力、对比敏感度和主观视觉质量情况.方法 对2011年6月至2012年6月在成都军区总医院眼科就诊的20例(40只眼)高度近视患者行ICL植入术.术前及术后分别检查裸眼视力(UCVA)、最佳矫正视力(BCVA)、屈光度、无眩光对比敏感度和眩光对比敏感度,并进行满意度问卷调查.结果 术后1个月和6个月UCVA和BCVA均明显高于术前差异有统计学意义(P<0.05).术后1个月屈光度(-0.54±0.60)D与术后6个月(-0.56±0.22)D差异无统计学意义(P>0.05).无眩光对比敏感度和眩光对比敏感度在术后1个月和6个月时6.0、12.0和18.0 cpd各频率段对比敏感度值与术前相比均显著提高,差异有统计学意义(P<0.05),术后6个月和术后1个月相比各频率段差异均无统计学意义(P>0.05);无眩光对比敏感度值和眩光对比敏感度值,在术前、术后1个月和术后6个月各时间段,两者间各频率段差异均无统计学意义(P>0.05);满意度问卷调查,其满意度达100%.结论 ICL植入手术,术后患者视觉质量全面提高,是在高度近视患者中值得广泛推广的手术方式.%Objective To assess the clinical outcomes about the visual quality of implantable contact lens implantation for high myopia.Methods Forty eyes with high myopia of 20 patients that underwent ICL (STAAR Surgical,Switzerland) implantation were examined.Refraction,visual acuity,contrast sensitivity (CS) with and without glare were evaluated at 1 month and 6 months postoperatively.Results Significant improvement in uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA) were found at 1 month and 6 months postoperatively (P <0.05).The refraction at 1 month (-0.56±0.59D) and 6 months (-0.56±0.22D) postoperatively were no significant difference (P > 0.05).The CS with and without glare were all significantly

  14. Clinical observation on cataract with lens subluxation treated by phacoemulsification combined with intraocular lens implanta-tion%晶状体不全脱位白内障超声乳化手术临床观察

    Institute of Scientific and Technical Information of China (English)

    原文新; 曲端; 郭哲锋

    2013-01-01

    目的:观察超声乳化白内障吸出联合人工晶体植入术治疗晶状体不全脱位白内障的疗效及安全性。方法对56例(60眼)晶状体不全脱位白内障患者采用超声乳化白内障吸出术,人工晶状体固定方式采用睫状沟缝线固定或囊袋内植入,观察术后视力及并发症等情况。结果56例(60眼)病例脱位晶状体均顺利取出,并植入人工晶状体,视力均有不同程度提高。结论超声乳化白内障吸出联合人工晶状体植入术治疗晶状体不全脱位白内障是安全有效的。%Objective To observe the efficacy and safety of phacoe-mulsification combined with intraocular lens implantation for the treatment of cataract with lens subluxation. Methods 56cases (60eyes) cataract with lens subluxation were operated by phacoemulsification,intraocular lens were fixed in ciliary sulcus with sutures or implanted in the capsular bag. The visual acuity and the postoperative complications were observed and analyzed. Results 56 cases (60 eyes) cases of dislocated lens were removed successfully,with implantation of artificial lens,visual acuity was improved in different degree. Conclusion Phacoemulsifi-cation combined with intraocular lens implantation for the treatment of dislocated lens cataract is safe and effective.

  15. 有晶状体眼后房型人工晶状体植入术治疗高度近视术后早期临床疗效%Preliminary clinical efficacy of posterior chamber phakic intraocular lens implantation for high myopia

    Institute of Scientific and Technical Information of China (English)

    黎冬平; 刘磊; 栗静; 王虎杰

    2014-01-01

    目的 观察有晶状体眼后房型人工晶状体(implantable contact lens,ICL)植入术治疗高度近视的早期临床效果.方法 按照拟定的入选标准选取行ICL植入术治疗的高度近视患者48例90眼,术后随访6个月.记录术前、术后各随访时间点的裸眼视力、等效球镜度、低对比度视力、眼压及角膜内皮细胞密度.使用SPSS 19.0软件描述术前术后各指标的分布特征,采用非参数检验对裸眼视力进行手术前后的差异性比较,采用配对t检验对其余各指标进行手术前后的差异性比较.结果 90眼均成功植入ICL.全部患者在随访期中,裸眼视力均达到术前最佳矫正视力,52.2%的眼数超出一行及以上;等效球镜度维持在±1.0D;低对比度视力术后1个月、3个月、6个月分别为-0.43 ±0.20、-0.47 ±0.21、-0.45±0.18,较术前矫正屈光不正后测得值有所提高(P<0.05),眼压无明显变化(P>0.05),角膜内皮细胞密度较术前减少(P<0.05).对于术后有统计学意义的指标,除低对比度视力在术后3个月达稳定水平外,其余指标均在术后1个月时即达到稳定状态.91.7%的患者对ICL植入术早期效果表示满意,全部患者术后均未出现严重并发症.结论 有晶状体眼后房型人工晶状体植入术矫正高度近视在术后早期随访中取得了满意的临床效果.

  16. Experimentally observe the effect of spherical aberration on diffractive intraocular lens using adaptive optics

    Science.gov (United States)

    Guo, Huanqing; DeLestrange, Elie

    2015-03-01

    We first investigated the similarity in optical quality of a batch of diffractive intraocular lenses (DIOLs), providing experimental evidence for one DIOL as representative of a batch. Using adaptive optics, we then evaluated one DIOL under different levels of Zernike spherical aberration (SA) by applying both a point spread function test and a psychophysical visual acuity test. We found that for small aperture size SA has the effect of shifting the through-focus curve of DIOL. Also, for a relatively large aperture size, it has different effects on the distant and near foci.

  17. Combined ab interno trabeculotomy and lens extraction: a novel management option for combined uveitic and chronic narrow angle raised intraocular pressure.

    Science.gov (United States)

    Lin, Siying; Gupta, Bhaskar; Rossiter, Jonathan

    2016-02-01

    Minimally invasive glaucoma surgery is a developing area that has the potential to replace traditional glaucoma surgery, with its known risk profile, but at present there are no randomised controlled data to validate its use. We report on a case where sequential bilateral combined ab interno trabeculotomy and lens extraction surgery was performed on a 45-year-old woman with combined uveitic and chronic narrow angle raised intraocular pressure. Maximal medical management alone could not control the intraocular pressure. At 12-month follow-up, the patient had achieved stable intraocular pressure in both eyes on a combination of topical ocular antiglaucomatous and steroid therapies. This case demonstrates the effectiveness of trabecular meshwork ablation via ab interno trabeculotomy in a case of complex mixed mechanism glaucoma.

  18. Application of ultrasound biomicroscope in posterior chamber intraocular lens implantation of phakic eye%超声生物显微镜在有晶状体眼后房型人工晶状体植入术中的应用

    Institute of Scientific and Technical Information of China (English)

    杜改萍; 郭慧玲; 董莹; 王丽强; 葛梅; 黄一飞

    2012-01-01

    Objective To compare the conventional white to white method with ultrasound biomicroscopic (UBM) method in estimating the sulcus-to-sulcus horizontal diameter for implantable collamer lens (ICL) length determination to 1CL vault. Methods This study was retrospective research. A total of 113 patients (191 eyes) undergoing ICL implantation were examined from May 2009 to December 2012. All patients were divided into two group, conventional group and UBM group. The central vault of ICL was assessed quantitatively at 6 months after surgery and the results were compared between the two groups. The relation between the ICL vault and ICL power was also investigated. Results There was no statistical difference in general information of patients between two groups (all P > 0. 05). The central vault at 6 months after surgery was (444. 63 ±202. 00)μm in conventional group and( 463. 67 ± 226. 00)μm in UBM group,and there was no statistical difference between two groups (P =0.094). The patients with ideal ICL vault from 250 μm to 750μm was 70 eyes(76. 1% )in conventional group and 77 eyes(77. 8% ) in UBM group, and there was no statistical difference between two groups (x2 =0. 0769, P = 0. 782). The ICL vault was not correlated with ICL power in two groups (r = 0. 002,0. 011; P = 0. 677,0. 349). Conclusion The UBM method is the best methods in terms of predicting the sulcus-to-sulcus horizontal diameter for ICL length determination. But in some hospital without UBM equipment,the conventional white to white method could be an alternative method for predicting the sulcus-to-sulcus horizontal diameter for ICL length determination.%目的 研究传统测量角膜水平直径方法和超声生物显微镜(ultrasound biomicroscopy,UBM)方法测量睫状沟水平直径来选择后房型人工晶状体(implantable collamer lenses,ICL)的长度,比较两种方法对有晶状体眼ICL术后拱高的影响.方法 回顾性研究2009年5月至2010年12

  19. Clinical reports about Chinese-made silicone intraocular lens implantation and small-incision phacoemulsification cataract surgery%国产硅凝胶人工晶状体植入及小切口非超声乳化白内障术分析

    Institute of Scientific and Technical Information of China (English)

    沈志兵

    2010-01-01

    Objective To investigate the clinical results of the non-phacoemulsification small incision cataract extraction and silicone intraocular lens implantation, compared to the effect of Chinese-made silicone intraocular lens and imported silicone intraocular lens. Methods Ninety-eight cases (103 eyes) were randomly divided into the small-incision after phacoemulsification and implanted intraocular lens of the domestical Exlen group and imported Cannon Starr group. Vision, anterior chamber inflammation and other complications were observed and recorded 1 day, 1 week, 1 month and 6 months after surgery. Results The best corrected visual acuity ≥ 1.0 in 24 eyes (23.53%), best corrected visual acuity ≥0.5 (70.59%), no serious complications occurred.Conclusions The efficacy ofsmall incision phacoemulsification cataract extraction and intraocular lens implantation between domestically produced Exlen and imported Cannon Starr silicone intraocular lens is similar.%目的 探讨小切口非超声乳化白内障及硅凝胶人工晶状体植入术的临床效果,对比国产硅凝胶人工晶状体和进口硅凝胶人工晶状体的疗效.方法 对98例(103只眼)施行小切口非超声乳化后分别植入国产艾克伦晶状体和进口Canon starr晶状体的患者进行随机分组,对术后1d、1周、1月、3月、6月视力、前房炎症及其他并发症进行观察记录.结果 术后最佳矫正视力≥1.0者24只眼(23.53%),(70.59%)的本眼最佳矫正视力≥0.5,无严重并发症发生.结论 小切口非超声乳化白内障术后植入国产艾克伦硅凝胶晶状体和进口Canon starr硅凝胶晶状体疗效接近.

  20. Incidence of posterior capsule opacification following the implantation of a foldable hydrophilic acrylic intraocular lens: a 4 year follow-up study

    OpenAIRE

    Priscilla de Almeida Jorge; Delano Jorge; Camila Vieira Ventura; Bruna Vieira Ventura; Wagner lira; Marcelo Carvalho Ventura; Marcony Rodrigues de Santhiago; Newton Kara-Junior

    2014-01-01

    Purpose: To evaluate the incidence of posterior capsule opacification (PCO) four years after the implantation of a hydrophilic acrylic intraocular lens (IOL). Methods: Fifty-eight randomly selected eyes from 58 patients were analyzed four years after phacoemulsification and Ioflex IOL implantation. The patients underwent an ophthalmic examination to detect PCO and a detailed medical history was obtained. The patients' charts were reviewed for their corrected distance visual acuity prior to ...

  1. Intraocular lens implantation in unilateral congenital cataract with minimal levels of persistent fetal vasculature in the first 18 months of life

    OpenAIRE

    Matsuo, Toshihiko

    2014-01-01

    Purpose To describe the incidence of unilateral congenital cataract associated with minimal (ultrasonically undetectable) levels of persistent fetal vasculature in the first 18 months of the life and to report surgical methods for intraocular lens implantation, using 25-gauge vitrectomy system. Methods Retrospective review was made on 16 consecutive patients with bilateral or unilateral congenital cataract in the first 18 months of the life who underwent surgery at Okayama University Hospital...

  2. Intraocular lens implantation in unilateral congenital cataract with minimal levels of persistent fetal vasculature in the first 18 months of life

    OpenAIRE

    Matsuo, Toshihiko

    2014-01-01

    [PURPOSE] To describe the incidence of unilateral congenital cataract associated with minimal (ultrasonically undetectable) levels of persistent fetal vasculature in the first 18 months of the life and to report surgical methods for intraocular lens implantation, using 25-gauge vitrectomy system.[METHODS] Retrospective review was made on 16 consecutive patients with bilateral or unilateral congenital cataract in the first 18 months of the life who underwent surgery at Okayama University Hospi...

  3. Research progress of intraocular lens implantation after cataract surgery%白内障术后人工晶体植入的研究进展

    Institute of Scientific and Technical Information of China (English)

    胡向松

    2011-01-01

    @@ 白内障是一种常见的眼科疾病,目前药物治疗效果不确切,手术治疗是主要的方式.白内障超声乳化联合人工晶体(intraocular lens,IOL)植入术是患者重见光明的最有效方法.本研究就IOL的发展与临床应用作一综述.

  4. Desempenho visual após implante de uma lente intraocular asférica multifocal difrativa Visual performance after implantation of an aspheric multifocal diffractive intraocular lens

    Directory of Open Access Journals (Sweden)

    Leonardo Akaishi

    2010-08-01

    Full Text Available OBJETIVO: Avaliar a acuidade visual a distancia, intermediária e perto após o implante de uma lente intraocular (LIO asférica multifocal difrativa AcrySof® ReSTOR® SN6AD1. MÉTODOS: Estudo prospectivo de 50 pacientes com catarata submetidos à facoemulsificação e implante de LIO AcrySof® ReSTOR®. Foram avaliados acuidade visual sem correção (AVSC, acuidade visual com correção (AVCC para longe, acuidade visual para perto corrigida para longe (AVPC e acuidade visual intermediária corrigida para longe (AVIC. Um questionário de satisfação e fenômenos visuais foi administrado ao final do estudo. RESULTADO: Após três meses de cirurgia, a média das acuidades (logMAR era: AVSC, 0,05 ± 0,07; AVCC, 0,00 ± 0,01; AVPC, 0,00 ± 0,0, e AVIC, 0,15 ± 0,05. A AVCC e AVPC era de 20/25 ou melhor em todos os pacientes, sendo a AVIC J3 ou melhor em 83% dos pacientes. Pacientes relataram excelente desempenho visual nas questões relacionadas a atividades para distância, intermediário, e perto com pouca ou nenhuma dificuldade. Nenhum paciente relatou halos ou 'glare' severos, sendo os mesmos caracterizados entre nenhum a moderado. CONCLUSÃO: A LIO asférica AcrySof® ReSTOR® SN6AD1 mostrou excelentes resultados na visão para longe, perto e intermediário, além de apresentar uma baixa incidência de fenômenos visuais.PURPOSE: To evaluate distance, intermediate, and near vision after aspheric multifocal diffractive AcrySof® ReSTOR® SN6AD1 intraocular lens (IOL implantation. METHODS: Prospective study of 50 patients with cataract that had phacoemulsification and AcrySof® ReSTOR® IOL implantation. Uncorrected distance vision acuity (UDVA, corrected distance visual acuity (CDVA, distance-corrected near visual acuity (DCNVA, and distance-corrected intermediate visual acuity (DCIVA were measured postoperatively. A patient-satisfaction and visual phenomena questionnaire was administered at the end of the study. RESULTS: Three months

  5. Movement of a posterior chamber lens in phakic eyes assessed with partial coherence interferometry

    CERN Document Server

    Koeppl, C M

    2001-01-01

    Purpose: the implantable contact lens (ICL sup T sup M , STAAR Surgical), a posterior chamber phakic IOL, provides an effective refraction correction among high myopic and hypermetropic patients. However, the cause of cataract formation in some of these patients is still unclear. Mechanical contact between the ICL and the crystalline lens and inadequate aqueous circulation in the prelenticular space may cause subcapsular opacification. To get a better understanding of the pathogenesis of cataract formation after ICL implantation the distance changes between the ICL and the crystalline lens under different conditions were investigated. Methods: in an open pilot study, 13 eyes of 11 myopic and 2 hyperopic patients with a mean age of 38 years (range: 19 to 53 years) were examined at least 6 months after ICL implantation. Using a non-invasive, high resolution biometry technique, partial coherence interferometry (PCI), which has unprecedented precision in the micrometer region, distance changes between the ICL and...

  6. Clinical application of the three-piece intraocular lens with optical surfaces entrapment by the posterior capsule in secondary intraocular lens implantation of the pediatric cataract for preventing lens dislocation%三片式人工晶状体光学面后囊孔嵌压术在预防儿童白内障二期人工晶状体脱位应用

    Institute of Scientific and Technical Information of China (English)

    王志亮

    2014-01-01

    目的 评价三片式人工晶状体光学面后囊孔嵌压术在预防儿童白内障二期人工晶状体脱位的临床疗效.方法 选择2009年10月至2010年11月期间在邢台市眼科医院就诊的5岁以内儿童无晶状体眼患儿76例152只眼.手术分为两组,A组(单纯人工晶状体睫状沟植入组)80只眼;B组(人工晶状体光学面后囊孔嵌压组)72只眼,随访3~19个月,平均11个月.结果 A组80只眼中有13只眼出现人工晶状体脱位,B组72只眼中只有1只眼出现人工晶状体瞳孔夹持,两组对比有统计学意义(x2=10.01,P<0.05).结论 使用光学部直径大的三片式人工晶状体,将其光学部确实地嵌压在后囊孔后,可以有效地预防儿童白内障二期人工晶状体植入术后人工晶状体脱位.%Objective To assess the clinical effects of the three-piece intraocular lens which optical surfaces were captured by the posterior capsule in secondary intraocular lens implantation of the pediatric cataract.Methods The 152 eyes of children less than 5 years old with aphakia were selected between October 2009 and November 2010.Operation was divided into two groups,Group A (the intraocular lens which were implanted at ciliary sulcus) 80 eyes,Group B (the intraocular lens which optical surfaces were captured by the posterior capsule) 72 eyes,follow-up duration was from 3 to 19 months,an average of 11 months.Results In group A,there were 13 eyes of intraocular lens dislocation.In group B,there was only 1 eye of intraocular lens captured by the pupil.There was significant difference between two groups (P <0.05).Conclusions The three-piece intraocular lens which big optical surfaces are captured by the posterior capsule can prevent the dislocation in secondary intraocular lens implantation of the pediatric cataract.

  7. Optical ensemble analysis of intraocular lens performance through a simulated clinical trial with ZEMAX.

    Science.gov (United States)

    Zhao, Huawei

    2009-01-01

    A ZEMAX model was constructed to simulate a clinical trial of intraocular lenses (IOLs) based on a clinically oriented Monte Carlo ensemble analysis using postoperative ocular parameters. The purpose of this model is to test the feasibility of streamlining and optimizing both the design process and the clinical testing of IOLs. This optical ensemble analysis (OEA) is also validated. Simulated pseudophakic eyes were generated by using the tolerancing and programming features of ZEMAX optical design software. OEA methodology was verified by demonstrating that the results of clinical performance simulations were consistent with previously published clinical performance data using the same types of IOLs. From these results we conclude that the OEA method can objectively simulate the potential clinical trial performance of IOLs.

  8. A Circadian and Cardiac Intraocular Pressure Sensor for Smart Implantable Lens.

    Science.gov (United States)

    Donida, Achille; Di Dato, Giuseppe; Cunzolo, Paolo; Sala, Marco; Piffaretti, Filippo; Orsatti, Paolo; Barrettino, Diego

    2015-12-01

    This paper presents a new system to measure the Intraocular Pressure (IOP) with very high accuracy (0.036 mbar) used for monitoring glaucoma. The system not only monitors the daily variation of the IOP (circadian IOP), but also allows to perform an spectral analysis of the pressure signal generated by the heartbeat (cardiac IOP). The system comprises a piezoresistive pressure sensor, an application-specific integrated circuit (ASIC) to read out the sensor data and an external reader installed on customized glasses. The ASIC readout electronics combines chopping modulation with correlated double sampling (CDS) in order to eliminate both the amplifier offset and the chopper ripple at the sampling frequency. In addition, programmable current sources are used to compensate for the atmospheric pressure ( 800-1200 mbar ) and the circadian component (± 7 mbar) thus allowing to read out the very weak cardiac signals (± 1.6 mbar) with a maximum accuracy of 0.036 mbar.

  9. Optical Coherence Tomography–Based Corneal Power Measurement and Intraocular Lens Power Calculation Following Laser Vision Correction (An American Ophthalmological Society Thesis)

    Science.gov (United States)

    Huang, David; Tang, Maolong; Wang, Li; Zhang, Xinbo; Armour, Rebecca L.; Gattey, Devin M.; Lombardi, Lorinna H.; Koch, Douglas D.

    2013-01-01

    Purpose: To use optical coherence tomography (OCT) to measure corneal power and improve the selection of intraocular lens (IOL) power in cataract surgeries after laser vision correction. Methods: Patients with previous myopic laser vision corrections were enrolled in this prospective study from two eye centers. Corneal thickness and power were measured by Fourier-domain OCT. Axial length, anterior chamber depth, and automated keratometry were measured by a partial coherence interferometer. An OCT-based IOL formula was developed. The mean absolute error of the OCT-based formula in predicting postoperative refraction was compared to two regression-based IOL formulae for eyes with previous laser vision correction. Results: Forty-six eyes of 46 patients all had uncomplicated cataract surgery with monofocal IOL implantation. The mean arithmetic prediction error of postoperative refraction was 0.05 ± 0.65 diopter (D) for the OCT formula, 0.14 ± 0.83 D for the Haigis-L formula, and 0.24 ± 0.82 D for the no-history Shammas-PL formula. The mean absolute error was 0.50 D for OCT compared to a mean absolute error of 0.67 D for Haigis-L and 0.67 D for Shammas-PL. The adjusted mean absolute error (average prediction error removed) was 0.49 D for OCT, 0.65 D for Haigis-L (P=.031), and 0.62 D for Shammas-PL (P=.044). For OCT, 61% of the eyes were within 0.5 D of prediction error, whereas 46% were within 0.5 D for both Haigis-L and Shammas-PL (P=.034). Conclusions: The predictive accuracy of OCT-based IOL power calculation was better than Haigis-L and Shammas-PL formulas in eyes after laser vision correction. PMID:24167323

  10. Medium-term visual outcomes of apodized diffractive multifocal intraocular lens with +3.00 d addition power.

    Science.gov (United States)

    Guo, Xiaohong; Sun, Yi; Zhang, Bowen; Zheng, Danying

    2014-01-01

    Purpose. To evaluate 2-year visual acuities and questionnaire after bilateral implantation of SN6AD1 multifocal intraocular lens (MIOL) or SN60WF IOL. Methods. Patients randomly scheduled for bilateral implantation of SN6AD1 MIOL and SN60WF IOL with 2-year follow-up were enrolled. Uncorrected/corrected distance and near visual acuity, uncorrected intermediate visual acuity at 63 cm under high and low contrast, reading activity, the defocus curve, and a quality-of-life questionnaire were evaluated. Results. Each group comprised 20 patients. Uncorrected intermediate visual acuities and uncorrected near visual acuity were better in SN6AD1 group than in SN60WF group (P = 0.005, P = 0.011, and P reading newspaper duration than SN60WF group (P = 0.036). When using mobile phone, SN6AD1 group had a more comfortable distance than SN60WF group (P reading fixed text message (P < 0.001). Conclusion. SN6AD1 MIOL provided a satisfactory full range of visual acuities and questionnaire performance 2 years postoperatively. One-year and 2-year uncorrected near and intermediate visual acuities of SN6AD1 MIOL were lower than those 3 months postoperatively. PMID:24724014

  11. High order aberration and straylight evaluation after cataract surgery with implantation of an aspheric,aberration correcting monofocal intraocular lens

    Institute of Scientific and Technical Information of China (English)

    Florian; T; A; Kretz; Tamer; Tandogan; Ramin; Khoramnia; Gerd; U; Auffarth

    2015-01-01

    ·AIM: To evaluate the quality of vision in respect to high order aberrations and straylight perception after implantation of an aspheric, aberration correcting,monofocal intraocular lens(IOL).·METHODS: Twenty-one patients(34 eyes) aged 50 to83 y underwent cataract surgery with implantation of an aspheric, aberration correcting IOL(Tecnis ZCB00,Abbott Medical Optics). Three months after surgery they were examined for uncorrected(UDVA) and corrected distance visual acuity(CDVA), contrast sensitivity(CS)under photopic and mesopic conditions with and without glare source, ocular high order aberrations(HOA, Zywave II) and retinal straylight(C-Quant).· RESULTS: Postoperatively, patients achieved a postoperative CDVA of 0.0 log MAR or better in 97.1% of eyes. Mean values of high order abberations were +0.02±0.27(primary coma components) and-0.04 ±0.16(spherical aberration term). Straylight values of the C-Quant were 1.35±0.44 log which is within normal range of age matched phakic patients. The CS measurements under mesopic and photopic conditions in combination with and without glare did not show any statistical significance in the patient group observed(P ≥0.28).· CONCLUSION: The implantation of an aspherical aberration correcting monofocal IOL after cataractsurgery resulted in very low residual higher order aberration(HOA) and normal straylight.

  12. Nd:YAG Laser Lysis of the Fibrinous Membrane and Remnant Substance on the Anterior Surface of Intraocular Lens

    Institute of Scientific and Technical Information of China (English)

    ZhendeLin; ChenjinJin

    1995-01-01

    Purpose:To determine the effects of ND:YAGlaser to disrupt the fibrinous membrane and remnant substance on the anterior surface of intraocular lens.Methods:Nd:YAGlaser was applied on 23cases of fibrinous membrane forma-tion and 8cases of remnant substance on the anterior surface of intaocular lenses(IOL)which had not reponded well to steroid therapy,Eighteen cases were male and 13female.The mean age was49.7years(range,5-78years),The in-terval between IOL implantation and laser therapy was 0.5-30months in the fibrinous membrane cases and 3-10days in the remnant substance cases.The energy applied was0.8-3.0mJ/exp.with2-112exposures.mean follow-up period was3.6months.Results:Complications during therapy included only 2cases of slight iris bleed-ing,Visual acuity after therapy was improved 1line in 16cases,2lines in 11cas-es,3lines in 1case,4lines in 1case and 5lines in 2cases,No post-therapy com-plication was found.Conclusions:Nd:YAG laser lysis is an effective alternative to ramove the fibri-nous membrane and remnant substances on the anterior surface of IOL.Eye Sci-ence1995;11:128-130.

  13. Effects of posterior corneal astigmatism on the accuracy of AcrySof toric intraocular lens astigmatism correction

    Science.gov (United States)

    Zhang, Bin; Ma, Jing-Xue; Liu, Dan-Yan; Guo, Cong-Rong; Du, Ying-Hua; Guo, Xiu-Jin; Cui, Yue-Xian

    2016-01-01

    AIM To evaluate the effects of posterior corneal surface measurements on the accuracy of total estimated corneal astigmatism. METHODS Fifty-seven patients with toric intraocular lens (IOL) implantation and posterior corneal astigmatism exceeding 0.5 diopter were enrolled in this retrospective study. The keratometric astigmatism (KA) and total corneal astigmatism (TA) were measured using a Pentacam rotating Scheimpflug camera to assess the outcomes of AcrySof IOL implantation. Toric IOLs were evaluated in 26 eyes using KA measurements and in 31 eyes using TA measurements. Preoperative corneal astigmatism and postoperative refractive astigmatism were recorded for statistical analysis. The cylindrical power of toric IOLs was estimated in all eyes. RESULTS In all cases, the difference of toric IOL astigmatism magnitude between KA and TA measurements for the estimation of preoperative corneal astigmatism was statistically significant. Of a total of 57 cases, the 50.88% decreased from Tn to Tn-1, and 10.53% decreased from Tn to Tn-2. In all cases, 5.26% increased from Tn to Tn+1. The mean postoperative astigmatism within the TA group was significantly lower than that in the KA group. CONCLUSION The accuracy of total corneal astigmatism calculations and the efficacy of toric IOL correction can be enhanced by measuring both the anterior and posterior corneal surfaces using a Pentacam rotating Scheimpflug camera. PMID:27672591

  14. A study on visual outcomes after cataract surgery with intraocular lens implants at the rural health training center, Paithan, Maharashtra

    Directory of Open Access Journals (Sweden)

    Vijay K Domple

    2011-01-01

    Full Text Available A study was conducted to assess the visual outcomes of patients after cataract surgery with intraocular lens implants with reference to visual acuity (VA and visual function (VF and to assess patient satisfaction with surgical outcome. The retrospective study was carried out using operation theatre records at the Rural Health Training Centre (RHTC, Paithan, during 2007. Out of 819 cataract surgery patients operated in 2007 a total of 50 were selected randomly. Door-to-door visits were paid by investigator and multipurpose worker to previously operated patients for VA examination and to fill predesigned questionnaire. Statistical analysis was done by using SPSS 17.0 Version; 50% patients had VA in fair vision range of <6/18-6/60 and 52% showed the VF in the range of 76-100. Of the 32 satisfied patients, majority were in the age group 70-79 years. The patients with good visual outcomes achieved after surgery would act as pamphlets for the community.

  15. Comparison of two different methods of preoperative marking for toric intraocular lens implantation: bubble marker versus pendulum marker

    Science.gov (United States)

    Farooqui, Javed Hussain; Koul, Archana; Dutta, Ranjan; Shroff, Noshir Minoo

    2016-01-01

    AIM To compare the accuracy of two different methods of preoperative marking for toric intraocular lens (IOL) implantation, bubble marker versus pendulum marker, as a means of establishing the reference point for the final alignment of the toric IOL to achieve an outcome as close as possible to emmetropia. METHODS Toric IOLs were implanted in 180 eyes of 110 patients. One group (55 patients) had preoperative marking of both eyes done with bubble marker (ASICO AE-2791TBL) and the other group (55 patients) with pendulum marker (Rumex®3-193). Reference marks were placed at 3-, 6-, and 9-o'clock positions on the limbus. Slit-lamp photographs were analyzed using Adobe Photoshop (version 7.0). Amount of alignment error (in degrees) induced in each group was measured. RESULTS Mean absolute rotation error in the preoperative marking in the horizontal axis was 2.42±1.71 in the bubble marker group and 2.83±2.31in the pendulum marker group (P=0.501). Sixty percent of the pendulum group and 70% of the bubble group had rotation error ≤3 (P=0.589), and 90% eyes of the pendulum group and 96.7% of the bubble group had rotation error ≤5 (P=0.612). CONCLUSION Both preoperative marking techniques result in approximately 3 of alignment error. Both marking techniques are simple, predictable, reproducible and easy to perform. PMID:27275425

  16. The impact of multifocal intraocular lens in retinal imaging with optical coherence tomography.

    Science.gov (United States)

    Dias-Santos, Arnaldo; Costa, Lívio; Lemos, Vanessa; Anjos, Rita; Vicente, André; Ferreira, Joana; Cunha, João Paulo

    2015-02-01

    Multifocal intraocular lenses (MF IOLs) have concentric optical zones with different dioptric power, enabling patients to have good visual acuity at multiple focal points. However, several optical limitations have been attributed to this particular design. The purpose of this study is to access the effect of MF IOLs design on the accuracy of retinal optical coherence tomography (OCT). Cross-sectional study conducted at the Refractive Surgery Department of Central Lisbon Hospital Center. Twenty-three eyes of 15 patients with a diffractive MF IOL and 27 eyes of 15 patients with an aspheric monofocal IOL were included in this study. All patients underwent OCT macular scans using Heidelberg Spectralis(®). Macular thickness and volume values and image quality (Q factor) were compared between the two groups. There were no statistically significant differences between both groups regarding macular thickness or volume measurements. Retinal OCT image quality was significantly lower in the MF IOL group (p image quality. However, this fact does not seem to compromise the accuracy of spectral domain OCT retinal measurements. PMID:25381578

  17. Visual outcomes and optical quality after implantation of a diffractive multifocal toric intraocular lens

    Science.gov (United States)

    Chen, Xiangfei; Zhao, Ming; Shi, Yuhua; Yang, Liping; Lu, Yan; Huang, Zhenping

    2016-01-01

    Background: This study evaluated the visual function after implantation of a multifocal toric intraocular lenses (IOLs). Materials and Methods: This study involved 10 eyes from eight cataract patients with corneal astigmatism of 1.0 diopter (D) or higher who had received phacoemulsification with implantation of an AcrySof IQ ReSTOR Toric IOL. Six-month evaluations included visual acuity, spherical equivalent (SE), defocus curve, residual astigmatism, IOL rotation, contrast sensitivity (CS), wavefront aberrations, modulation transfer function (MTF), and patient satisfaction assessments. Results: At 6 months postoperatively, uncorrected distance visual acuity (logarithm of the minimum angle of resolution) was 0.09 ± 0.04, corrected distance visual acuity was 0.02 ± 0.11, and uncorrected near visual acuity was 0.12 ± 0.07. The mean SE was −0.095 ± 0.394 D (±0.50 D in 90%). Refractive astigmatism at the 6-month follow-up visit was significantly reduced to 0.35 ± 0.32 D from 1.50 ± 0.41 D presurgery (P 0.05). There was an increase in MTF results between preoperative and postoperative evaluations at all spatial frequencies. Conclusions: The diffractive multifocal toric IOL is able to provide a predictable astigmatic correction with apparently outstanding levels of optical quality after implantation. PMID:27221680

  18. Imaging of aphakic intraocular lens with a slit-scanning tomography system

    Science.gov (United States)

    Oliveira, Cristina M.; Almeida, J. B.; Franco, S.

    2011-05-01

    Nowadays, cataract extraction with IOL implantation aims not only to restore the crystalline lens' transparency, but also to improve patients' retinal image quality. The refractive outcome and visual quality in pseudophakic eyes is mainly determined by the combination of corneal and internal optics resulting from the implanted IOLs. The optical function of the IOLs depends on its position in the eye. The IOL distance to the corneal apex determines the optical power needed for optical correction. In this paper it is described the usage of a slit-scanning imaging system to determine IOL positioning. Through the projection of the light from a slit onto the eye, this tomography system allows to acquire multiple sections of the anterior eye segment, at different meridians. The developed system's software corrects geometric and optical distortion of the images and provides 3-dimentional models of the eye's structures from the 2-dimensional sections. With this noninvasive technique, cross-sectional images of an eye with an aphakic IOL were obtained in order to reconstruct its 3- dimensional model of the lens and assess its position in the anterior segment camera.

  19. Clinical analysis of long-term artificial lens dislocation after phakic irisfixated intraocular lens implantation%有晶状体眼虹膜固定型人工晶状体植入术后远期人工晶状体脱位临床分析

    Institute of Scientific and Technical Information of China (English)

    张莹; 谭少建; 李霞; 刘彩娟; 梁皓

    2015-01-01

    目的 探讨有晶状体眼虹膜固定型有晶状体眼人工晶状体(phakic intraocular lens,PIOL)植入术后远期人工晶状体脱位、移位情况及原因分析.方法 对我中心2005至2013年开展的Verisyse PIOL植入术矫正高度近视患者52例(104眼)进行术后平均6.5a随访性研究,对其中发生PIOL脱位、移位患者的临床资料进行回顾性分析.结果 104眼中8眼发生PIOL不全脱位,其中1眼是因为拳头打伤颞侧晶状体袢脱落,2眼因皮球打伤眼睛致一侧晶状体袢脱落,1眼因撞击后出现鼻侧晶状体袢脱落,2眼是搬动重物一侧晶状体袢脱落,1眼是自然分娩后出现双侧晶状体袢脱落并PIOL脱落入前房,1眼是夹持虹膜部位退行性改变致晶状体脱位.7眼发生PIOL下移,下移程度>0.5 mm,其中晶状体袢单侧下移2眼,双侧下移5眼.8眼PIOL脱位中6眼行PIOL再固定术,2眼行PIOL取出术.结论 PIOL脱位与术后眼部外力及外伤、眼压波动、手术时固定虹膜组织的程度不够、所夹取的虹膜组织发生脱色素和退行性变有关,PIOL本身有自身的重量,长期作用会发生向下移位或襻脱离.%Objective To explore the long-term postoperative dislocation and displacement of intraocular lens after Verisyse phakic intraocular lens (Verisyse PIOL) implantation,and analyze the reasons of dislocation and displacement of intraocular lens.Methods Based on the random survey carried out on 52 cases who have received Verisyse PIOL implantation for correction of high myopia in our center from 2005 to 2013,the follow-up time averaged 6.5 years,the cases of dislocation and displacement of intraocular lens were retrospectively analyzed.Results In 104 eyes,PIOL in 8 eyes appeared incomplete dislocations,including 1 eye with temporal crystal loop loss resulted from punching,2 eyes with side crystal loop losses induced by ball-beating,1 eye with nasal crystal loop loss due to impact,2 eyes with side crystal loop losses

  20. Pseudophakic hyperopia in nanophthalmic eyes managed by a posterior chamber implantable collamer lens

    Directory of Open Access Journals (Sweden)

    Kothari Kulin

    2011-01-01

    Full Text Available We report a case of a bilateral posterior chamber implantable collamer lens (ICL implantation post-clear lens extraction, to reduce the residual hyperopia, in a patient with nanophthalmic eyes. A 30-year-old female patient, keen to reduce her dependency on glasses and contact lenses, came to our refractive surgery department. Her refractive error was +12.0 and +12.5 diopters in the right and left eye, respectively, with steep corneas on keratometry and a shallow anterior chamber depth. She underwent clear lens extraction with implantation of +35.0 D and +40.0 D IOL in the right eye and left eye, respectively. Her post-operative best-corrected visual acuity was 20/30 with +8.5 D in the right eye and +6 D in the left. She underwent bilateral ICL implantation. Postoperatively after 6 months, her unaided visual acuity was 20/30 in both eyes. In conclusion, ICL implantation can be considered to correct residual hypermetropic ametropia in pseudophakic eyes when other options have limitations.

  1. Avaliação da sensibilidade ao contraste e da estereopsia em pacientes com lente intra-ocular multifocal Contrast sensitivity and stereopsis in pseudophakic patients with multifocal intraocular lens

    Directory of Open Access Journals (Sweden)

    Filipe de Oliveira

    2005-08-01

    Full Text Available OBJETIVO: Avaliar a sensibilidade ao contraste e a acuidade estereoscópica em pacientes pseudofácicos, que receberam implante bilateral de lente intra-ocular multifocal. MÉTODOS: Prospectivamente foram realizados testes de sensibilidade ao contraste com o uso da tabela Pelli-Robson e teste de acuidade estereoscópica com emprego do Titmus Stereo Test, em 20 pacientes com implante bilateral de lente intra-ocular multifocal Acrysof Restor®, no pós-operatório de 1 a 2 meses e sem uso de qualquer correção óptica. RESULTADOS:O teste de sensibilidade ao contraste binocular demonstrou que 6 pacientes (30% apresentaram 1,80 unid. log, 13 (65% 1,65 e 1 (5% 1,50. No teste monocular, ocorreram as seguintes respostas: 17 pacientes (85% 1,65 unid. log e 3 (15% 1,50 para o teste do olho direito. O teste do olho esquerdo mostrou que 16 pacientes (80% apresentaram 1,65 unid. log e 4 (20% 1,50. A média e o desvio-padrão da sensibilidade ao contraste testada binocularmente foi 1,69 (±0,08, ao passo que monocularmente foi 1,63 (±0,05 para OD e 1,62 (±0,06 para OE. O teste de acuidade estereoscópica revelou que 12 pacientes (60% obtiveram 40", 6 (30% 50" e 2 (10% 60", com média de 45" e desvio-padrão de ±6,88". CONCLUSÃO: A lente intra-ocular empregada no estudo, proporcionou resultados de sensibilidade ao contraste e acuidade estereoscópica compatíveis e de acordo com critérios de normalidade estabelecidos anteriormente por outros estudos em grupos de pacientes fácicos e pseudofácicos, e portanto, impacto positivo na funcionalidade visual.PURPOSE: To evaluate the contrast sensitivity and stereopsis tests in patients who underwent bilateral implantation of multifocal intraocular lens. METHODS: Tests of contrast sensitivity using the Pelli-Robson chart and stereopsis evaluation with the Titmus Stereo Test were performed in 20 patients 30-60 days after the bilateral implantation of Acrysof Restor® multifocal intraocular lens. RESULTS: The

  2. Meta-analysis and review: effectiveness, safety, and central port design of the intraocular collamer lens.

    Science.gov (United States)

    Packer, Mark

    2016-01-01

    The purpose of this review is to summarize relevant data from publications appearing in the peer-reviewed scientific literature over the past decade since US Food and Drug Administration approval of the implantable collamer lens (ICL), and, in particular, to review studies relating to sizing methodology, safety, and effectiveness, as well as more recent studies reporting clinical outcomes of the V4c Visian ICL with KS Aquaport, VICMO. A literature search was conducted using two databases, PubMed.gov and Science.gov, to identify all articles published after 2005 related to the Visian ICL (STAAR Surgical, Inc.). Articles were examined for their relevance to sizing methodology, clinical safety, and effectiveness, and the references cited in each article were also searched for additional relevant publications. The literature review revealed that all currently reported methods of determining the best-fit size of the ICL achieve similarly satisfactory results in terms of vault, the safe distance between the crystalline lens and the ICL. Specifically, meta-analysis demonstrated that sulcus-to-sulcus and white-to-white measurement-based sizing methods do not result in clinically meaningful nor statistically significant differences in vault (two-sample two-sided t-test using pooled mean and standard deviations; t (2,594)=1.33; P=0.18). The reported rates of complications related to vault are very low, except in two case series where additional risk factors such as higher levels of myopia and older age impacted the incidence of cataract. On the basis of preclinical studies and initial clinical reports, with up to 5 years of follow-up, the new VICMO central port design holds promise for further reduction of complications. Given its safety record and the significant improvement in vision and quality of life that the ICL makes possible, the benefits of ICL implantation outweigh the risks. PMID:27354760

  3. Meta-analysis and review: effectiveness, safety, and central port design of the intraocular collamer lens

    Science.gov (United States)

    Packer, Mark

    2016-01-01

    The purpose of this review is to summarize relevant data from publications appearing in the peer-reviewed scientific literature over the past decade since US Food and Drug Administration approval of the implantable collamer lens (ICL), and, in particular, to review studies relating to sizing methodology, safety, and effectiveness, as well as more recent studies reporting clinical outcomes of the V4c Visian ICL with KS Aquaport, VICMO. A literature search was conducted using two databases, PubMed.gov and Science.gov, to identify all articles published after 2005 related to the Visian ICL (STAAR Surgical, Inc.). Articles were examined for their relevance to sizing methodology, clinical safety, and effectiveness, and the references cited in each article were also searched for additional relevant publications. The literature review revealed that all currently reported methods of determining the best-fit size of the ICL achieve similarly satisfactory results in terms of vault, the safe distance between the crystalline lens and the ICL. Specifically, meta-analysis demonstrated that sulcus-to-sulcus and white-to-white measurement-based sizing methods do not result in clinically meaningful nor statistically significant differences in vault (two-sample two-sided t-test using pooled mean and standard deviations; t (2,594)=1.33; P=0.18). The reported rates of complications related to vault are very low, except in two case series where additional risk factors such as higher levels of myopia and older age impacted the incidence of cataract. On the basis of preclinical studies and initial clinical reports, with up to 5 years of follow-up, the new VICMO central port design holds promise for further reduction of complications. Given its safety record and the significant improvement in vision and quality of life that the ICL makes possible, the benefits of ICL implantation outweigh the risks. PMID:27354760

  4. Use of a Toric Intraocular Lens and a Limbal-Relaxing Incision for the Management of Astigmatism in Combined Glaucoma and Cataract Surgery

    Science.gov (United States)

    Gibbons, Allister

    2016-01-01

    Purpose We report the surgical management of a patient with glaucoma undergoing cataract surgery with high preexisting astigmatism. A combination of techniques was employed for her astigmatism management. Methods A 76-year-old female with 5.5 dpt of corneal astigmatism underwent surgery in her left eye consisting of one-site trabeculectomy, phacoemulsification, toric intraocular lens implantation and a single inferior limbal-relaxing incision. Results Intraocular pressure control was achieved with no medication at 11 mm Hg; before the filtering procedure, the pressure was 16 mm Hg on two topical drugs. Astigmatism was reduced to 0.75 dpt, and both corrected and uncorrected visual acuity improved. Conclusions Astigmatism management can have a good outcome in combined procedures. We encourage surgeons to address astigmatism in the preoperative planning of patients undergoing glaucoma surgery associated with phacoemulsification. PMID:27293408

  5. Clinical Evaluation of Functional Vision of +1.5 Diopters near Addition, Aspheric, Rotational Asymmetric Multifocal Intraocular Lens

    Science.gov (United States)

    Khoramnia, Rahmin; Attia, Mary Safwat; Koss, Michael Janusz; Linz, Katharina; Auffarth, Gerd Uwe

    2016-01-01

    Purpose To evaluate postoperative outcomes and visual performance in intermediate distance after implantation of a +1.5 diopters (D) addition, aspheric, rotational asymmetric multifocal intraocular lens (MIOL). Methods Patients underwent bilateral cataract surgery with implantation of an aspheric, asymmetric MIOL with +1.5 D near addition. A complete ophthalmological examination was performed preoperatively and 3 months postoperatively. The main outcome measures were monocular and binocular uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), uncorrected intermediate visual acuity (UIVA), distance corrected intermediate visual acuity (DCIVA), uncorrected near visual acuity (UNVA) and distance corrected keratometry, and manifest refraction. The Salzburg Reading Desk was used to analyze unilateral and bilateral functional vision with uncorrected and corrected reading acuity, reading distance, reading speed, and the smallest log-scaled print size that could be read effectively at near and intermediate distances. Results The study comprised 60 eyes of 30 patients (mean age, 68.30 ± 9.26 years; range, 34 to 80 years). There was significant improvement in UDVA and CDVA. Mean UIVA was 0.01 ± 0.09 logarithm of the minimum angle of resolution (logMAR) and mean DCIVA was -0.02 ± 0.11 logMAR. In Salzburg Reading Desk analysis for UIVA, the mean subjective intermediate distance was 67.58 ± 8.59 cm with mean UIVA of -0.02 ± 0.09 logMAR and mean word count of 96.38 ± 28.32 words/min. Conclusions The new aspheric, asymmetric, +1.5 D near addition MIOL offers good results for distance visual function in combination with good performance for intermediate distances and functional results for near distance. PMID:27729759

  6. Medium-Term Visual Outcomes of Apodized Diffractive Multifocal Intraocular Lens with +3.00 D Addition Power

    Directory of Open Access Journals (Sweden)

    Xiaohong Guo

    2014-01-01

    Full Text Available Purpose. To evaluate 2-year visual acuities and questionnaire after bilateral implantation of SN6AD1 multifocal intraocular lens (MIOL or SN60WF IOL. Methods. Patients randomly scheduled for bilateral implantation of SN6AD1 MIOL and SN60WF IOL with 2-year follow-up were enrolled. Uncorrected/corrected distance and near visual acuity, uncorrected intermediate visual acuity at 63 cm under high and low contrast, reading activity, the defocus curve, and a quality-of-life questionnaire were evaluated. Results. Each group comprised 20 patients. Uncorrected intermediate visual acuities and uncorrected near visual acuity were better in SN6AD1 group than in SN60WF group (P=0.005, P=0.011, and P<0.001. In SN6AD1 group, the uncorrected intermediate and near visual acuities 1 year and 2 years postoperatively were reduced than postoperative 3-month outcomes, respectively. SN6AD1 group reported superior overall spectacle independence and inferior satisfaction. SN6AD1 group had a longer reading newspaper duration than SN60WF group (P=0.036. When using mobile phone, SN6AD1 group had a more comfortable distance than SN60WF group (P<0.001 and higher speed of reading fixed text message (P<0.001. Conclusion. SN6AD1 MIOL provided a satisfactory full range of visual acuities and questionnaire performance 2 years postoperatively. One-year and 2-year uncorrected near and intermediate visual acuities of SN6AD1 MIOL were lower than those 3 months postoperatively.

  7. Toric Intraocular Lens vs. Peripheral Corneal Relaxing Inci-sions to Correct Astigmatism in Eyes Undergoing Cataract Surgery

    Institute of Scientific and Technical Information of China (English)

    Zhiping Liu; Xiangyin Sha; Xuanwei Liang; Zhonghao Wang; Jingbo Liu; Danping Huang

    2014-01-01

    Purpose:.To compare toric intraocular lens implantation (Toric-IOL).with peripheral corneal relaxing incisions (PCRIs) for astigmatism correction in patients undergoing cataract surgery. Methods: 54 patients (54 eyes) with more than 0.75 diopter (D).of preexisting corneal astigmatism were classified as group A (0.75-1.50D) or group B (1.75-2.50D). The patients were randomized to undergo Toric-IOL or PCRIs in the steep axis with spherical IOL implantation..LogMAR uncorrected visual acuity (LogMAR UCVA), LogMAR best corrected vi sual acuity.(LogMAR BCVA),.error of vector (|EV|), surgery induced refraction correction. (|SIRC|),.and correction rates (CR) were measured 1 month and 6 months postoperatively. Results: At 6 months postoperatively, all 54 eyes had Log-MAR BCVA≤0.2. Patients who underwent PCRIs and Toric-IOL with LogMAR BCVA≤0.1 showed no significant differ-ences in group A (P=1.00) or in group B (P=0.59). Group A showed no significant differences in LogMAR UCVA (P=0.70), |EV| (P=0.13), |SIRC| (P=0.71), and CR (P=0.56) in patients underwent PCRIs and Toric-IOL. However, group B showed significant differences in LogMAR UCVA (P Conclusion:.The efficacy and stability of Toric-IOL and PCRIs were equal in low astigmatic patients..Toric-IOL achieved an enhanced effect over PCRIs in higher astigmatic patients. PCRIs had the more refractive regression than Toric-IOL in 6 months.

  8. Foldable iris-fixated phakic intraocular lens implantation for the correction of myopia: Two years of follow-up

    Directory of Open Access Journals (Sweden)

    Yusuf Ozertürk

    2012-01-01

    Full Text Available Purpose: To evaluate the safety, efficacy and potential risks of Artiflex foldable iris-fixated phakic intraocular lens (pIOL implantation for the management of myopia. Materials and Methods: Seventy-eight eyes of 40 consecutive patients with a mean spherical refraction of −11.70 ΁ 3.77 diopters (D; range −5.50 to −17.5 D were included in this prospective, noncomparative, interventional case series. Main parameters assessed were uncorrected visual acuity (UCVA, best-spectacle corrected visual acuity (BSCVA, corneal topography (Orbscan II, BauchandLomb, Rochester, NY, USA, manifest and cycloplegic refractive errors, endothelial cell density (ECD and applanation tonometry. Results: After 2 years, BSCVA was 20/40 or better in 82% of the eyes and UCVA was 20/40 or better in 84% of the eyes. After 1 month, 1 year, and 2 years, 51.3% (37 of 72 eyes, 58.9% (46 of 78 eyes and 76.0% (38 of 50 eyes of eyes gained 1 line or more of BSCVA, respectively. Compared to preoperative values, the mean endothelial cell loss was 2.6% at 1 month, 4.9% at 1 year and 7.4% at 2 years. Pigmented or non-pigmented precipitates were observed in17 eyes (21.7% which were treated with topical corticosteroids. At the second postoperative year, pigmented precipitates persisted in nine eyes. However, this was not associated with a loss of BSCVA. Conclusion: The implantation of Artiflex pIOL is an effective surgical option for the management of high myopia. The most common complication observed within 2 years of follow-up was accumulation of pigmented precipitates with no effect on the final BSCVA.

  9. Visual outcomes after implantation of a novel refractive toric multifocal intraocular lens

    Directory of Open Access Journals (Sweden)

    Talita Shimoda

    2014-04-01

    Full Text Available Purpose: To assess the postoperative outcomes of a novel toric multifocal in traocular lens (IOL in patients with cataract and corneal astigmatism. Methods: This prospective nonrandomized study included patients with cataract, corneal astigmatism, and a motivation for spectacle independence. In all patients, a Rayner M-flex® T toric IOL was implanted in the capsular bag. Three months after surgery, the distance, intermediate, and near visual acuities; spherical equivalent; residual refractive astigmatism; defocus curve; and contrast sensitivity were evaluated. A patient satisfaction and visual phenomena questionnaire was administered to all patients. Results: Thirty-four eyes of 18 patients were included in this study. Three months after surgery, the mean corrected distance visual acuity (logMAR was 0.00 ± 0.08 at 6 m, 0.20 ± 0.09 at 70 cm, and 0.08 ± 0.11 at 40 cm. Uncorrected distance vision acuity was 20/40 or better in 100% eyes. The preoperative mean refractive cylinder (RC was -2.19 (SD: ± 0.53. After a 3-month follow-up, the average RC was -0.44 D (SD: ± 0.27; p<0.001. Contrast sensitivity levels were high. At the last follow-up, 87.5% patients were spectacle-independent for near, intermediate, and distance vision, and approximately 44% patients reported halos and glare. Conclusion: Toric multifocal IOL implantation in patients with cataract and corneal astigmatism using the Rayner M-flex® T toric IOL was a simple, safe, and accurate option. This technology provides surgeons with a feasible option for meeting patient expectations of an enhanced lifestyle resulting from decreased spectacle dependence.

  10. A study of monofocal intraocular lens (AcrySof ®) in mini-monovision (MMV) and premium multifocal implantation of ReSTOR®

    OpenAIRE

    Chen, Ming

    2009-01-01

    Ming Chen1, Mindy Chen21John A Burns School of Medicine, University of Hawaii, USA; 2University of California, Irvine, USAAbstract: We compared the AcrySof® monofocal intraocular lens (IOL) in mini-monovision (MMV) (n = 20) with the ReSTOR® multifocal IOL (n = 20) for glasses independence after cataract surgery. The ReSTOR IOL showed a significantly higher proportion of postoperative independence from glasses. The MMV formula monofocal AcrySof recipients with the same pre-op s...

  11. Application progress of intraocular lens in congenital cataracts%人工晶状体在先天性白内障中的应用进展

    Institute of Scientific and Technical Information of China (English)

    董开业; 李才锐

    2011-01-01

    国际上对于小儿白内障手术和人工晶状体(intraocular lens,IOL)植入的经验一直在不断地改进.患者、家庭和医生都在期待着术后更好的结果,所以努力地改进手术技术和完善手术方法以及选择合适的IOL对患儿的预后视力非常重要.

  12. Research on the pathological mechanism of intraocular lens capsular biocompatibility%人工晶状体囊膜相容性病理机制探讨

    Institute of Scientific and Technical Information of China (English)

    姚克; 曲超

    2005-01-01

    人工晶状体(intraocular lens,IOL)的材料分为亲水和疏水2类.IOL囊膜相容性包括晶状体上皮细胞(LECs)增生膜、前囊膜混浊、后囊膜混浊和囊膜皱缩的程度.2类IOL在囊膜相容性方面差异较大.本文就目前的研究进展,对其病理机制进行探讨.

  13. Implantação de lente intraocular com uma alça amputada: proposta para o tratamento cirúrgico da subluxação do cristalino Intraocular lens implantation with one loop haptic amputed: a new propose to the subluxation lens surgical treatment

    Directory of Open Access Journals (Sweden)

    Marcelo Ventura

    2010-04-01

    Full Text Available OBJETIVO: Avaliar os resultados pós-operatórios da subluxação congênita do cristalino, corrigida por uma nova abordagem cirúrgica. MÉTODOS: Foram estudados 21 olhos de 13 pacientes, portadores de subluxação não traumática do cristalino submetidos à cirurgia na Fundação Altino Ventura, no período de abril de 1999 a abril de 2004. A idade média foi de 8,7 ± 5,4 anos, e o tempo médio de seguimento foi 21,5 ± 19,3 meses. Os pacientes foram submetidos à facoaspiração, implante do anel endocapsular e lente intraocular (LIO. Uma das alças da LIO foi amputada e apoiada sobre o anel, no interior do saco capsular, centralizando a LIO. RESULTADOS: Houve melhora da acuidade visual (AV em todos os casos, e redução significante do equivalente esférico e componente esférico comparando-se a refração pré e pós-operatória (pPURPOSE: To evaluate the postoperative results of congenital lens subluxation corrected by a new technique. METHODS: Retrospective chart review of 21 eyes of 13 patients with no traumatic lens subluxation who underwent surgery in Altino Ventura Foundation from April, 1999 to April, 2004. The mean age was 8.7 ± 5.4 years old, and the mean follow-up period was 21.5 ± 19.3 months. Patients underwent phacoaspiration, endocapsular ring and intraocular lens (IOL implantation. The implanted IOL had one loop haptic excised and was supported above the ring, inside the capsular bag promoting intraocular lens centralization. RESULTS: Visual acuity improvement was observed in all cases. There was a significant reduction of the spherical equivalent and spherical component comparing the pre and postoperative refraction (p<0.01. There was no statistically significant difference between the pre and postoperative cylinder component (p=0.71. Posterior capsule opacification was a postoperative complication found in 71.4% of the cases. Early posterior capsulotomy was performed with no complications in these cases. CONCLUSION

  14. Biometrias óptica e ultra-sônica: comparação dos métodos usados para o cálculo da lente intra-ocular acomodativa Optical and ultrasound biometry: comparision between the two methods used for the calculation of accommodative intraocular lens

    Directory of Open Access Journals (Sweden)

    Filipe de Oliveira

    2004-12-01

    reproducibility, level of agreement and correlation of two ultrasonic biometers and one optical biometer for the calculation of accommodative intraocular lens. METHODS: Cataract patients were submitted to the examination with 3 different biometers (IOLMaster, Axis II and Humphrey Mod. 820 before the implant of the C&C Vision AT-45 accommodative silicone intraocular lens. The Axis II biometer was used for both contact and immersion biometry. Axial length, anterior chamber depth and keratometry were the analyzed biometric parameters. RESULTS: Thirty-four patients from 53 to 90 years old (mean 70.6 y were submitted to the examination with the three different biometers. The lowest mean axial length (23.12 mm was obtained with the Axis II/contact and the highest (23.21 mm with the Humphrey biometer. The lowest mean anterior chamber depth (2.97mm was obtained with the Humphrey and the highest (3.10mm with the IOLMaster. Reproducibility for axial length was high for all the biometers tested (coefficient of variation: 3.02% for Humphrey and Axis II / immersion; 3.07 % for Axis II/contact and 3.19% for IOLMaster. All biometers presented nearly equal results of the analyzed parameters (99.01% for axial length and 94.77% for anterior chamber depth. Pearson's coefficient showed a high correlation between the biometers, regarding the axial length and anterior chamber depth measurements. CONCLUSION: The devices used in this study showed excellent reproducibility and high level of agreement and of the axial length, anterior chamber depth and keratometry measurements, making it possible to reduce errors of intraocular lens calculation and visual insatisfaction after cataract surgery.

  15. Changes in corneal endothelium cell characteristics after cataract surgery with and without use of viscoelastic substances during intraocular lens implantation

    Directory of Open Access Journals (Sweden)

    Schulze SD

    2015-11-01

    Full Text Available Stephan D Schulze,1 Thomas Bertelmann,1 Irena Manojlovic,2 Stefan Bodanowitz,2 Sebastian Irle,3 Walter Sekundo11Department of Ophthalmology, Philipps University of Marburg, Marburg, 2Private Practice and Ambulatory Surgical Center, Bremen, 3Freelance Statistician, Friedberg, GermanyPurpose: To evaluate whether the use of balanced salt solution (BSS or an ophthalmic viscoelastic device (OVD during hydrophilic acrylic intraocular lens (IOL implantation variously impacts corneal endothelial cell characteristics in eyes undergoing uneventful phacoemulsifications.Methods: Prospective nonrandomized observational clinical trial. Patients were assigned either to the BSS plus® or to the OVD Z-Celcoat™ group depending on the substance used during IOL implantation. Corneal endothelium cell characteristics were obtained before, 1 week, and 6 weeks after surgery. Intraoperative parameters (eg, surgery time, phacoemulsification energy were recorded.Results: Ninety-seven eyes were assigned to the BSS plus and 86 eyes to the Z-Celcoat group. Preoperative corneal endothelium cell density (ECD and endothelium cell size were 2,506±310 cells/mm2/2,433±261 cells/mm2 and 406±47 µm2/416±50 µm2 (P=0.107/P=0.09. After 1 and 6 weeks, ECD decreased and endothelium cell size increased significantly in both groups (each P<0.001 without significant differences between both groups (each P>0.05. Irrigation–aspiration suction time (30.3±16.6 versus 36.3±14.5 seconds and overall surgical time (7.2±1.2 versus 8.0±1.4 minutes were significantly longer in the OVD Z-Celcoat group (each P<0.001. No complications or serious side effects occurred.Conclusion: Implantation of a hydrophilic acrylic IOL under BSS infusion seems to be a useful and faster alternative in experienced hands without generating higher ECD loss rates.Keywords: phacoemulsification, ophthalmic viscoelastic device, endothelial cell density, IOL

  16. Corneal refractive surgery and phakic intraocular lens for treatment of amblyopia caused by high myopia or anisometropia in children

    Institute of Scientific and Technical Information of China (English)

    Tian Chunyu; Peng Xiujun; Fan Zhengjun; Yin Zhengqin

    2014-01-01

    Objective A systematic review of literature was performed to compare various visual function parameters including the final visual acuity outcome and/or adverse events between corneal refractive surgery (CLRS) and phakic intraocular lens implantation (p-IOLi) in the treatment of refractive amblyopic children.Data sources Two reviewers independently searched the PubMed,EMBASE,and Controlled Trials Register databases for publications from 1991 to 2013.Study selection There were 25 articles,including 597 patients and 682 eyes,was included in CLRS group.Among them,21 articles reported the use of CLRS in the treatment of myopic anisometropia for 318 patients (13 photorefractive keratectomy or laser epithelial keratomileusis and eight laser in situ keratomileusis).And 11 articles had the results of CLRS in treating hyperopic anisometropic amblyopia children.Eleven articles reported the effect of p-IOLi for treating high myopia or anisometropic amblyopia,including 61 patients (75 eyes).Age,pre-and postoperation best-corrected vision acuity (BCVA),and spherical equivalent (SE) were compared in CLRS and p-IOLi groups.Results The average age of CLRS group and p-IOLi group has no statistically significant difference.The SE in CLRS group for myopic anisometropia amblyopia patients was (-10.13±2.73) diopters (D) and for hyperopic anisometropia amblyopia patients was (5.58±1.28) D.In p-IOLi group the SE was (-14.01±1.93) D.BCVA was improved significantly in both groups,and even better in p-IOLi group.Refractive errors were corrected in both groups,but there was no clinically significant difference in final SE between each group.More than one-half of the children had improved binocular fusion and stereopsis function in both groups.Conclusions Both CLRS group and p-IOLi group showed their advantage in treating refractive amblyopia in children.In comparing p-IOLi with CLRS for treatment of refractive amblyopia,no statistically significant difference in final BCVA was observed.

  17. In-the-bag intraocular lens placement via secondary capsulorhexis with radiofrequency diathermy in pediatric aphakic eyes.

    Directory of Open Access Journals (Sweden)

    Lixia Luo

    Full Text Available Pediatric ophthalmologists increasingly recognize that the ideal site for intraocular lens (IOL implantation is in the bag for aphakic eyes, but it is always very difficult via conventional technique. We conducted a prospective case series study to investigate the success rate and clinical outcomes of capsular bag reestablishment and in-the-bag IOL implantation via secondary capsulorhexis with radiofrequency diathermy (RFD in pediatric aphakic eyes, in which twenty-two consecutive aphakic pediatric patients (43 aphakic eyes enrolled in the Childhood Cataract Program of the Chinese Ministry of Health were included. The included children underwent either our novel technique for secondary IOL implantation (with RFD or the conventional technique (with a bent needle or forceps, depending on the type of preoperative proliferative capsular bag present. In total, secondary capsulorhexis with RFD was successfully applied in 32 eyes (32/43, 74.4%, age 5.6±2.3 years, of which capsular bag reestablishment and in-the-bag IOL implantation were both achieved in 30 eyes (30/43, 70.0%, but in the remaining 2 eyes (2/32, 6.2% the IOLs were implanted in the sulcus with a capsular bag that was too small. Secondary capsulorhexis with conventional technique was applied in the other 11 eyes (11/43, 25.6%, age 6.9±2.3 years, of which capsular bag reestablishment and in-the-bag IOL implantation were both achieved only in 3 eyes(3/43, 7.0%, and the IOLs were implanted in the sulcus in the remaining 8 eyes. A doughnut-like proliferative capsular bag with an extensive Soemmering ring (32/43, 74.4% was the main success factor for secondary capsulorhexis with RFD, and a sufficient capsular bag size (33/43, 76.7% was an additional factor in successful in-the-bag IOL implantation. In conclusion, RFD secondary capsulorhexis technique has 70% success rate in the capsular bag reestablishment and in-the-bag IOL implantation in pediatric aphakic eyes, particularly effective in

  18. Comparison of the Retinal Straylight in Pseudophakic Eyes with PMMA, Hydrophobic Acrylic, and Hydrophilic Acrylic Spherical Intraocular Lens

    Directory of Open Access Journals (Sweden)

    Ya-wen Guo

    2014-01-01

    Full Text Available Purpose. To investigate the intraocular straylight value after cataract surgery. Methods. In this study, 76 eyes from 62 patients were subdivided into three groups. A hydrophobic acrylic, a hydrophilic acrylic, and a PMMA IOL were respectively, implanted in 24 eyes, 28 eyes, and 24 eyes. Straylight was measured using C-Quant at 1 week and 1 month postoperatively in natural and dilated pupils. Results. The hydrophilic acrylic IOLs showed significantly lower straylight values than those of the hydrophobic acrylic IOLs in dilated pupils at 1 week and 1 month after surgery (P0.05. Moreover, no significant difference was found in straylight between natural and dilated pupils in each group at 1 week and 1 month postoperatively (P>0.05. Conclusions. Although the hydrophobic acrylic IOL induced more intraocular straylight, straylight differences among the 3 IOLs were minimal. Pupil size showed no effect on intraocular straylight; the intraocular straylight was stable 1 week after surgery.

  19. Posterior chamber implantable contact lens for 18 cases of high myopia%有晶状体眼后房型可植入式接触镜矫正高度近视患者18例

    Institute of Scientific and Technical Information of China (English)

    张淑萍; 叶子隆; 刘旭姣; 高岩; 史彩霞; 谢淑丽; 高海音

    2009-01-01

    Objective To investigate the efficacy and safety of posterior chamber implantable contact lens (ICL) implantation to correct high myopia in phakic eyes. Methods Under topical anesthesia 18 cases (32 eyes) of high myopia were treated with posterior chamber intraocular lens implantation. Comparisons between post-operative uncorrected visual acuity and pre-operative best corrected visual acuity, between post-operative refraction and pre-operative refraction, and between post-operative intraocular pressure and pre-operative pressure were carried out. ICL's location and complications such as cataract and secondary glaucoma were observed. Results Post-operative uncorrected visual acuity reached or exceeded the preoperative best corrected visual acuity in 18 cases (32 eyes). Except that 2 cases (2 eyes) had a transient high intraocular pressure 2 hours after the operation and 1 case had a high intraocular pressure 10 days after the operation, others were controlled normally. UBM showed that there was a certain gap between ICL and the lens. During the follow-up period, visual acuity, refraction, and intraocular pressure were stable. No complicated cataract, secondary glaucoma, retinal detachment or chronic meningitis, such as uvitis happened. Conclusion ICL posterior chamber intraocular lens implantation in eyes is safe and reliable.%目的 探讨有晶状体眼后房型可植入式接触镜(ICL)植入术矫正高度近视的有效性及安全性.方法 表面麻醉下对18例(32眼)高度近视患者行有晶状体眼后房型ICL植入术,将术后裸眼视力与术前最佳矫正视力对比.术后屈光度、眼压与术前屈光度、眼压进行对比.观察ICL在眼内的位置及有无并发性白内障、继发性青光眼等并发症的发生.结果 18例(32眼)术后裸眼视力均达到或超过术前最佳矫正视力,除两例(2眼)术后2 h出现一过性高眼压,1例(1眼)术后10d出现眼压升高,经局部降眼压对症治疗及停用激素眼药治疗

  20. 非球面人工晶状体植入术后患者的生存质量%Quality of life after aspheric intraocular lens implantation

    Institute of Scientific and Technical Information of China (English)

    陈风华; 曲惠红; 闫爱民

    2009-01-01

    目的 对植入非球面人工晶状体(aspherical intraocular lens,AIOL)的效果进行评价.方法 将2007年2月至2008年2月在本院行白内障超声乳化联合人工晶状体植入术患者96例随机分成AIOL组和球面人工晶状体(spherical intraocular lens,SIOL)组,并对2组患者术后满意度和生存质量进行比较.结果 AIOL组和SIOL组患者总满意率分别为42例(87.50%)和28例(58.33%),差异有显著统计学意义(P<0.01).AIOL组和SIOL组患者半年后视物舒适度及暗适应功能分值经比较,差异均有显著统计学意义(t=5.746 1,P<0.001;t=2.959 7,P<0.01).结论 AIOL值得在临床推广.

  1. Vitrectomy combined with phacoemulsification and intraocular lens suspension for lens dislocation%玻璃体切割联合超声乳化及人工晶状体悬吊术治疗晶状体脱位

    Institute of Scientific and Technical Information of China (English)

    田锁成; 雷建平

    2011-01-01

    Objective To investigate the clinical effects of vitrectomy combined with phacoemulsification and intraocular lens suspension for lens dislocation. Methods Thirty patients (30 eyes) with lens dislocated into the vitreous were chosen,in which 25 eyes with whole lens dislocation induced by contused wound of eyeball,2 eyes with whole lens dislocation after cataract surgery,3 eyes with lens nucleus dislocated into the vitreous after cataract extraction. The different methods were used according to the nucelus hardness dislocated into the vitreous,the vitrectomy combined with phacoemulsification and intraocular lens suspension was performed, the silicone oil filled when necessary. The visual acuity,intraocular pressure and complications were observed,the follow-up time was from 0.5 a to 1 a. Results The vitrectomy combined with lens excision and intraocular lens suspension were performed in 19 cases (19 eyes),vitrectomy combined with phacoemulsification and intraocular lens suspension in 10 cases (10 eyes),vitrectomy combined with phacoemulsification and silicone oil padding in 1 case(1 eye). Postoperative visual acuity was from 0.1 to 0.3 in 16 eyes,from 0.3 to 0.5 in 9 eyes,more than 0.5 in 5 eyes;Post-operative 3 eyes had secondary glaucoma and came back to normal range after treatment. No other complications occurred during the follow-up time,such as retinal detachment,vitreous hemorrhage,artificial lens for deviation,et al. Conclusion Vitrectomy combined with phacoemulsification and intraocular lens suspension is a safe and effective therapeutic method for lens dislocation.%目的 探讨玻璃体切割联合超声乳化及人工晶状体悬吊术治疗晶状体脱位的临床疗效.方法 选取晶状体脱入玻璃体内的患者30例(30眼),其中眼球钝挫伤引起的晶状体全脱位25眼,针拨白内障术后晶状体全脱位2眼,白内障摘出术中晶状体核脱入玻璃体内3眼.根据脱入玻璃体内的晶状体核硬度不同采用不同的手

  2. 有晶体眼人工晶体植入术后高眼压的临床分析%Clinical analysis of high intraocular pressure after implantable collamer lens implantation

    Institute of Scientific and Technical Information of China (English)

    唐莉; 白淑玮; 马波

    2015-01-01

    Objective To summarize the reasons of high intraocular pressure (IOP) after implantable collamer lens im-plantation, discuss the treatment and prevention method. Methods 108 eyes of 54 patients with high myopia in the Fourth Hospital of Xi'an from January 2011 to May 2014 were selected. All patients were given implantable collamer lens implantation, followed up for 3 months. The naked eye eyesight, best corrected visual acuity, intraocular pressure, slit-lamp examination, fundus examination, high arch of artificial crystal were observed. Results 1 day to 3 months af-ter surgery, all patients' naked eye eyesight achieved or exceeded the preoperative best corrected vision. 1 day after surgery, 13 eyes had intraocular hypertension, IOP ranged from 25-38.8 mmHg. After treatment of local and systemic IOP-lowering medication or anterior chamber puncture, IOP of 10 eyes had returned to normal levels 3 days after surgery, IOP of 2 eyes gradually decreased after stopping using glucocorticoid eye drops at the 7th day after surgery. IOP of 1 patient had bad-controlled 1 month after treatment, given intraocular lens replacement surgery. IOP of all pa-tients returned to normal after 3 months follow-up. 1 month after surgery, ultrasonic biological microscope measure showed that high arch of artificial crystal ranged from 0.5-1.04 mm, artificial lens had not been in contact with the lens itself. After 3 months follow-up, there was no lens opacity. Conclusion There are several reasons for high IOP after implantable collamer lens implantation. According to the etiology give corresponding treatment, intraocular pressure of patients will be back to normal.%目的:总结有晶体眼后房型人工晶体又称植入型接触镜(ICL)植入术后高眼压的发生原因,探讨其防治方法。方法收集2011年1月~2014年5月在西安市第四医院住院的高度近视患者54例(108眼),均行有晶体眼人工晶体植入术。术后随访3个月,随访项目包括裸眼视力

  3. 超声乳化+人工晶体植入术及整体护理应用%Phacoemulsification + artificial intraocular lens implantation and application of holistic nursing

    Institute of Scientific and Technical Information of China (English)

    薛佩琴

    2011-01-01

    Objective To implement advanced phacoemulsification + artificial intraocular lens implantation, improving the cure rate of cataract surgery. Methods Holistic nursing was implemented in the preoperative, intraoperative and postoperative process, so as to organically integrate phacoemulsification and artificial intraocular lens implantation in cataract surgery. The surgery procedures and its relevant nursing have been made specific and operational, fully embodying the principle of patient - centered and holistic nursing which highlighted the principle of "putting people first". Results The application of holistic nursing effectively alleviated the fear and anxiety of patients. After surgery, visual recovery rate of 893 patients was above 97% . Conclusion The integration of phacoemulsification + artificial intraocular lens implantation in cataract surgery and holistic nursing can have better effects, higher cure ate and increased satisfaction of medical staff. It is worthy of wider clinical application in eye surgery.%目的 开展先进的超声乳化+人工人工晶体植入术,提高白内障手术的治愈率.方法 运用整体护理于手术的术前、术中、术后全过程,使白内障超声乳化+人工晶体植入术与整体护理有机结合,将手术及护理范围扩展并细化,充分体现一切“以患者为中心”,处处体现以人为本的整体护理.结果 整体护理的运用有效地缓解了患者的恐惧紧张心理,893例患者术后视力恢复良好率达97%以上.结论 白内障超声乳化+人工晶体植入术与整体护理的运用,手术效果好,治愈率高,患者欢迎,医护人员满意,是眼科手术临床运用的好方法.

  4. Ciliary block (malignant) glaucoma after cataract extraction with lens implant treated with YAG laser capsulotomy and anterior hyaloidotomy.

    OpenAIRE

    Halkias, A; Magauran, D M; Joyce, M

    1992-01-01

    An 84-year-old woman developed high intraocular pressure with a shallow anterior chamber 2 months after an extracapsular cataract extraction with posterior chamber lens implant. The condition did not respond to peripheral iridectomy and removal of the implant but was treated successfully with YAG laser capsulotomy and anterior hyaloidotomy.

  5. Visual acuity and patient satisfaction at varied distances and lighting conditions after implantation of an aspheric diffractive multifocal one-piece intraocular lens

    Science.gov (United States)

    Chang, Daniel H

    2016-01-01

    Purpose The aim of the study is to evaluate the visual acuity and patient satisfaction at varied distances under photopic and mesopic lighting conditions in patients bilaterally implanted with aspheric diffractive multifocal one-piece intraocular lenses. Methods In this retrospective–prospective study, 16 patients with a mean age of 66.2±9.2 years (range: 50–81 years) who had undergone bilateral phacoemulsification surgery with implantation of a Tecnis multifocal one-piece intraocular lens (ZMB00) were evaluated. Monocular and binocular uncorrected and distance-corrected visual acuities were measured at distance (20 ft), intermediate (70–80 cm), and near (35–40 cm) under photopic (85 cd/m2) and mesopic (3 cd/m2) lighting conditions and were compared using the paired t-test. All patients also completed a subjective questionnaire. Results At a mean follow-up of 9.5±3.9 months, distance, near, and intermediate visual acuity improved significantly from preoperative acuity. Under photopic and mesopic conditions, 93.8% and 62.5% of patients, respectively, had binocular uncorrected intermediate visual acuity of 20/40 or better, and 62.5% and 31.3% of patients had binocular uncorrected near visual acuity of 20/20 or better. All patients were satisfied with their overall vision without using glasses and/or contact lenses when compared with before surgery. A total of 87.5% of patients reported no glare and 68.8% of patients reported no halos around lights at night. Conclusion Tecnis multifocal one-piece intraocular lenses provide good distance, intermediate, and near visual acuity under photopic as well as mesopic lighting conditions. High levels of spectacle independence with low levels of photic phenomenon were achieved, resulting in excellent patient satisfaction. PMID:27536061

  6. Polymethyl methacrylate intraocular lens opacification 20 years after cataract surgery: A case report in a tertiary eye hospital in Saudi Arabia.

    Science.gov (United States)

    Al-Otaibi, Abdullah G; Al-Qahtani, Elham S

    2012-01-01

    Snowflake degeneration is a slow progressive opacification of polymethyl methacrylate (PMMA) intraocular lenses (IOLs). This late postoperative complication can occur a decade or later after implantation. The deposits are composed of IOL materials that tend to aggregate centrally. There is a relative paucity of the literature on snowflake degeneration of IOLs. Symptoms can range from mild visual disturbance to significant loss of visual acuity. In cases of opacification after IOL implantation, the different diagnosis should include snowflake degeneration to prevent surgical intervention such as lens exchange or explantation unless clinically warranted. We report a case of late optical opacification of a PMMA IOL, the clinical diagnosis and treatment that increased best corrected vision. PMID:23960977

  7. 非球面晶状体与传统球面晶状体植入术后对比敏感度的研究%Contrast sensitivity of aspheric and standard spherical intraocular lens after phacoemulsification

    Institute of Scientific and Technical Information of China (English)

    徐仁凤; 王理理; 黄振平; 吴勇

    2007-01-01

    目的:比较白内障术后早期非球面晶状体与传统球面晶状体植入术后功能视力.方法:白内障患者共50例,随机分成两组,一组患者植入以Acrysof IQ(Alcon)为代表的非球面晶状体,共23例 23眼;一组植入以AR40e(AMO)为代表的传统球面晶状体,共27例27眼.于术后1mo用CSV-1000E对比敏感度测试仪(由VECTOR VISION 公司提供)进行对比敏感度测定.结果:以Acrysof IQ (Alcon)为代表的非球面晶状体在6.12.18cpd时较以AR40e(AMO)为代表的传统球面晶状体能显著的提高患者对比敏感度.结论:以Acrysof IQ(Alcon)为代表的非球面晶状体可提高患者的功能视力%AIM:To compare the contrast sensitivity obtained through anterior surface modified prolate intraocular lens with the contrast sensitivity obtained through standard spherical intraocular Iens.METHODS:Patients presenting for cataract surgery in one eye were randomized to receive either the Acrysef IQ intraocular lens(AIcon)or the AR40e intraocular lens(AMO).50 eyes after phacoemulsification with IOL implantation were included,23 eyes received Acrysof IQ,and 27 eyes received AP40e intraocular lens (AMO).Contrast sensitivity testing under photopic conditions (85cd/m2)served as the prindpal outcome measure.The contrast sensitivity function was measured with CSV-1000E Vision Testing Instrument(provided by VECTOR ⅥSION COMPANY) at 30 days after surgery.RESULTS:The Acrysof IQ intraocular lens provided statistically significantly better contrast sensitivity at 6,12 and 18 cydes per degree under photopic conditions.CONCLUSION:The use of anterior surface modified prolate intraocular lens for cataract surgery has the potential to improve functional vision.

  8. In-the-bag decentration of an intraocular lens in a patient with a tendency to hypertrophic scarring

    Science.gov (United States)

    Joshi, Rajesh Subhash

    2016-01-01

    Summary We report a case of rapid anterior lens capsular contraction leading to decentration of a hydrophilic acrylic lens with stiff haptics (Rayner design). To our knowledge, this is the first report to investigate early capsular contraction with folding of the haptic over the optic in a patient with a tendency toward hypertrophic scar formation. PMID:27330480

  9. Linguatula serrata in the anterior chamber of the eye

    Directory of Open Access Journals (Sweden)

    Muna Bhende

    2014-01-01

    Full Text Available We report a case of intraocular Linguatula in healthy young female who presented with a history of trivial trauma, dislocated lens, inflammation and secondary glaucoma. A mobile worm was seen in the anterior chamber. Pars plana lensectomy and vitrectomy was planned to remove both the cataractous lens and the parasite during which the worm disappeared from view but was later recovered from the cassette fluid. It was identified as the nymphal form of Linguatula serrata (tongue worm.

  10. Avaliação da eficácia da facectomia com implante de lente intra-ocular na infância Efficacy of pediatric cataract extraction with intraocular lens implantation

    Directory of Open Access Journals (Sweden)

    Núbia Cristina de Freitas Maia

    2005-12-01

    . METHODS: A total of 33 eyes in 27 children were studied. Children with either unilateral or bilateral cataracts were submitted to lensectomy surgery via pars plana, with intraocular lens implant, associated with primary posterior capsulectomy and anterior vitrectomy. The intraocular lenses were calculated for emmetropia in the first postoperative month. All children were less than six years old at the time of the surgery and had a 2.9 year average follow-up. They were divided into 3 groups. Group I (10 eyes, children with unilateral cataracts and under three years old at the time of the surgery; group II (11 eyes, children with unilateral cataracts and above three years old; group III (12 eyes, children with bilateral cataracts and above three years old at the time of the surgery. RESULTS: On the last follow-up examination recorded visual acuity was equal to or above 20/40 in 85% of the eyes. A spherical equivalent close to emmetropia in the first postoperative month was obtained in 70% of the children of group III but only in 30% of group I. Regarding postoperative refraction variation, myopic shift was detected in 81.81% of the cases. The younger the children were when undergoing surgery, the greater the refractional alteration. CONCLUSION: Despite the myopic shift that happens with the use of intraocular lenses in the treatment of pediatric aphakia in children under six years old, the visual result is very good and the residual refraction correction is easily performed. A more prolonged postoperative follow-up would be necessary for long-term evaluation of the results.

  11. The Predictability of Preoperative Pilocarpine-Induced Lens Shift on the Outcomes of Accommodating Intraocular Lenses Implanted in Senile Cataract Patients

    Science.gov (United States)

    Li, Jin; Chen, Qi; Lin, Zhibo; Leng, Lin; Huang, Fang

    2016-01-01

    Purpose. To evaluate the predictability of lens shift induced by pilocarpine (LSPilo) on the outcomes of accommodating intraocular lens (Acc-IOL) implantation. Methods. Twenty-four eyes of 24 senile cataract patients who underwent phacoemulsification and Acc-IOL implantation were enrolled. LSPilo was evaluated with anterior segment optical coherence tomography (AS-OCT). At 3 months postoperatively, the best corrected distance visual acuities (BCDVA), distance-corrected near visual acuities (DCNVA), and subjective and objective accommodations were measured. IOL shifts under accommodation stimulus (IOLSAcc) were evaluated with AS-OCT. Results. The mean LSPilo was 112.29 ± 30.72 µm. LSPilo was not associated with any preoperative parameters. The mean IOLSAcc was 130.46 ± 42.71 µm. The mean subjective and objective accommodation were 1.54 ± 0.39 D and 1.27 ± 0.41 D, respectively. The mean postoperative BCDVA and DCNVA (log MAR value) were 0.22 ± 0.11 and 0.24 ± 0.12, respectively. LSPilo positively correlated with IOLSAcc (r = 0.541; P = 0.006), subjective accommodation (r = 0.412; P = 0.022), and objective accommodation (r = 0.466; P = 0.045), respectively. Conclusion. LSPilo is an independent preoperative parameter associated with the postoperative Acc-IOL mobility and pseudophakic accommodation. It may offer valuable information for ophthalmologists in determining the suitable candidates for Acc-IOL implantation. PMID:27516899

  12. Implante intra-ocular de lentes dobráveis "piggyback" em paciente portador de catarata congênita no primeiro ano de vida: relato de caso Piggyback foldable intraocular lens implant in patient with congenital cataract in the first year of life: case report

    Directory of Open Access Journals (Sweden)

    Leonardo Akaishi

    2004-12-01

    Full Text Available No presente relato os autores descrevem um caso de catarata congênita unilateral tratada cirurgicamente com implante intra-ocular de lentes dobráveis "piggyback", ainda não descrito na literatura nacional. São analisadas as diferenças e semelhanças com outros casos descritos na literatura.The authors report a case of congenital cataract, which was treated with piggyback foldable intraocular lens implant, not described in the Brazilian literature. The differences and similarities are analyzed with other reported cases in the literature.

  13. Anterior chamber flare after trabeculectomy and after phacoemulsification

    OpenAIRE

    Siriwardena, D; Kotecha, A; Minassian, D; Dart, J.; KHAW, P.

    2000-01-01

    AIMS—To evaluate and compare prospectively the anterior chamber inflammatory response after phacoemulsification cataract surgery and after trabeculectomy with peripheral iridectomy.
METHODS—Anterior chamber inflammation was measured using the Kowa FM-500 laser flare meter in 131 patients undergoing trabeculectomy and 148 patients undergoing phacoemulsification cataract extraction with intraocular lens implantation. Flare was measured before surgery and on each postoperative visit up to 12 mon...

  14. 高度近视有晶状体眼人工晶状体植入对调节功能影响%The effect on accommodation of phakic intraocular lens implantation for high myopia

    Institute of Scientific and Technical Information of China (English)

    郭长锋; 王勤美; 朱双倩; 俞阿勇

    2010-01-01

    目的 分析有晶状体眼人工晶状体植入术对高度近视患者调节功能的影响.方法 收集2008年8月至2009年3月在行有晶状体眼人工晶状体植入的高度近视患者16例(32只眼),年龄(27.56±4.50)岁(19~35)岁,其中10例接受后房型有晶状体眼人工晶状体植入手术(Visian ICL),6例行虹膜夹型有晶体眼人工晶状体植入手术(Verisyse).分别于术前和术后1周及术后3个月测量屈光状态、最佳矫正远视力、调节近点、正负相对调节(PRA/NRA)、调节灵活度.数据采用SPSS15.0统计软件包行单因素方差分析.结果 术前、术后1周及术后3个月的最佳矫正远视力分别为4.84±0.12、4.91±0.11、4.92±0.11:调节近点分别为(10.02±1.92)cm、(14.38±3.59)cm、(13.19±2.91)cm.术后1周和3个月时较术前明显远移(F=19.45,P0.05).结论 高度近视有晶状体眼人工晶状体植入术后调节近点明显远移,正负相对调节和单眼调节灵活度手术前后无明显变化.%Objective To study the effect on accommodation of phakic intraocular lens implantation for high myopia. Methods In this prospective study, 32 eyes of 16 patients with high myopia received phakic intraocular lenses implantation in our hospital from August 2008 to March 2009 were collected. Age 19 to 35 years (mean age 27.56±4.50 years). Among them 10 patients received posterior chamber intraocular lens implantation surgery (PRL), 6 patients received the Verisyse iris-fixated phakic IOL surgery. The refractive diopter, best corrected visual acuity (BCVA), near point accommodation, positive/negative relation accommodation (PRA/NRA), monocular accommodation facility were measured preoperation, 1 week and 3 months postoperation, respectively. The data were analyzed with one-way ANOVA by SPSS15.0. Results The best corrected visual acuity (BCVA)of preoperation, 1 week 3 months and postoperation was 4.84±0.12, 4.91±0.11,4.92±0.11, respectively. The near point accommodationwas

  15. 超声生物显微镜协助人工晶状体单襻睫状沟缝线固定术%Single haptic suture fixation of intraocular lens at ciliary sulcus aided by ultrasound biomicroscopy

    Institute of Scientific and Technical Information of China (English)

    姚长海; 王庆瑛

    2015-01-01

    Objective To evaluate the clinical efficacy of single haptic suture fixation of intraocular lens at ciliary sulcus aided with ultrasound biomicroscopy. Methods Eighteen eyes of eighteen patients were enrolled in this study. They had undergone single haptic suture fixation of intraocular lens at ciliary sulcus. Eleven eyes of eleven patients whose operation plans were designed under the pre-UBM examinations formed group A, while seven eyes of seven patients who received routine haptic suture fixation operation formed group B. After the operation, all the patients took UBM examination, and the data of position of needle insertion and intraocular lens were recorded. Results Position of stitch insertion in group A located in (0. 76 ± 0. 11)mm posterior to corneal limbus, while it was 1. 0 mm in group B. In group A, there were 6 cases(54. 55%) in which haptics of intraocular lens were precisely implanted at ciliary sulcus. While in group B, there was only one eye(14. 29%). In group A, the intraocular lens tilt was (0. 4635 ± 0. 1655) mm, and the intraocular lens decentration was (0.3543 ±0.3246)mm. In group B, they were (0.6913 ± 0. 2069) mm and (0. 8351 ± 0. 6286) mm respectively. Conclusion Single haptic suture fixation of intraocular lens at ciliary sulcus aided by ultrasound biomicroscopy, can reduce the occurance of postoperative intraocular lens tilt and decentration.%目的:评价超声生物显微镜( UBM)协助下人工晶状体单襻睫状沟缝线固定的手术方法和临床疗效。方法人工晶体单襻睫状沟缝线固定术18例(18眼)。其中,术前行UBM检查并依此设计手术方式者11例,设为A组;术前未行UBM检查,按常规手术方式植入者7例,设为B组。术后行UBM检查并记录术中进针位置及人工晶状体位置相关数据进行统计学比较。结果 A组的进针位置位于角膜缘后(0.76±0.11)mm;B组进针位置位于角膜缘后1.0 mm,A组中能确切植入睫状沟者6例(54.55%),而B组中仅1

  16. COMPARISON OF ANTERIOR CHAMBER REACTION WITH SINGLE-PIECE AND THREE-PIECE INTRAOCULAR LENSES IN MANUAL SMALL INCISION CATARACT SURGERY

    Directory of Open Access Journals (Sweden)

    Usha

    2014-11-01

    Full Text Available OBJECTIVES: To study the anterior chamber reaction between single-piece and three-piece intraocular lenses in manual small incision cataract surgery. METHODS: Prospective study done at Mysore Race Club Charitable Eye Hospital. 140 Patients underwent suture less sclerocorneal tunnel cataract surgeries with single-piece or three-piece Polymethylmethacrylate (PMMA intra ocular lenses (3-piece IOL. Accurate Keratometry was done with the help of Bausch and Lomb Keratometer. IOL power was calculated by using SRK (Sanders-Retzlaff-Kraff II formula, with the help of non-immersion, contact type of A-Scan biometry. Single-piece IOLs were inserted in 70 patients. Three-piece IOL inserted in rest of 70 patients. Slit lamp examination for anterior chamber cells was graded according to Hogan system. Aqueous cells were measured by counting within the visible field under Slit lamp, keeping the beam at maximum intensity. Anterior chamber reaction (AC in 1stPostoperative week and at 8 weeks are compared and analyzed by ANOVA statistics. RESULTS: Single piece IOL group had anterior chamber reaction ranging from 1 to 2+ cells i.e., in 97%. In three-piece IOL group, 70%of eyes had 2+ cells and 12.8% had 3± cells. At 8 weeks, single- piece IOL showed either no cells or occasional cells in 98.6% of patients, compared to three –piece IOL group showing in 77%of cases. 23% had 1+ cells in later group. CONCLUSION: Single-piece implanted IOLs had significant less number of cells were seen in anterior chamber from 1 week to 8 weeks as compared to three-piece IOLs.

  17. Bilateral Primary Intraocular Lymphoma

    OpenAIRE

    Mehrdad Karimi; Masoud Soheilian; Mozhgan Rezaei Kanavi

    2011-01-01

    Purpose: To report a case of bilateral primary intraocular lymphoma. Case report: A 33-year-old man presented with bilateral blurred vision since two years ago. Examination revealed large keratic precipitates, anterior chamber reaction, posterior subcapsular cataracts, and vitreous infiltration. After a short trial of topical and periocular steroids, diagnostic 25-gauge pars plana vitrectomy was performed and cytologic evaluation of the aspirate confirmed a diagnosis of intraocular lympho...

  18. Visual acuity and patient satisfaction at varied distances and lighting conditions after implantation of an aspheric diffractive multifocal one-piece intraocular lens

    Directory of Open Access Journals (Sweden)

    Chang DH

    2016-08-01

    Full Text Available Daniel H Chang Empire Eye and Laser Center, Bakersfield, CA, USA Purpose: The aim of the study is to evaluate the visual acuity and patient satisfaction at varied distances under photopic and mesopic lighting conditions in patients bilaterally implanted with aspheric diffractive multifocal one-piece intraocular lenses. Methods: In this retrospective–prospective study, 16 patients with a mean age of 66.2±9.2 years (range: 50–81 years who had undergone bilateral phacoemulsification surgery with implantation of a Tecnis multifocal one-piece intraocular lens (ZMB00 were evaluated. Monocular and binocular uncorrected and distance-corrected visual acuities were measured at distance (20 ft, intermediate (70–80 cm, and near (35–40 cm under photopic (85 cd/m2 and mesopic (3 cd/m2 lighting conditions and were compared using the paired t-test. All patients also completed a subjective questionnaire. Results: At a mean follow-up of 9.5±3.9 months, distance, near, and intermediate visual acuity improved significantly from preoperative acuity. Under photopic and mesopic conditions, 93.8% and 62.5% of patients, respectively, had binocular uncorrected intermediate visual acuity of 20/40 or better, and 62.5% and 31.3% of patients had binocular uncorrected near visual acuity of 20/20 or better. All patients were satisfied with their overall vision without using glasses and/or contact lenses when compared with before surgery. A total of 87.5% of patients reported no glare and 68.8% of patients reported no halos around lights at night. Conclusion: Tecnis multifocal one-piece intraocular lenses provide good distance, intermediate, and near visual acuity under photopic as well as mesopic lighting conditions. High levels of spectacle independence with low levels of photic phenomenon were achieved, resulting in excellent patient satisfaction. Keywords: Tecnis multifocal one-piece IOL, photopic visual acuity, mesopic visual acuity, intermediate visual

  19. Bilateral Primary Intraocular Lymphoma

    Directory of Open Access Journals (Sweden)

    Mehrdad Karimi

    2011-01-01

    Full Text Available Purpose: To report a case of bilateral primary intraocular lymphoma. Case report: A 33-year-old man presented with bilateral blurred vision since two years ago. Examination revealed large keratic precipitates, anterior chamber reaction, posterior subcapsular cataracts, and vitreous infiltration. After a short trial of topical and periocular steroids, diagnostic 25-gauge pars plana vitrectomy was performed and cytologic evaluation of the aspirate confirmed a diagnosis of intraocular lymphoma. The patient was subsequently managed with intravitreal methotrexate in both eyes and responded favorably. Central nervous system workup for lymphoma was negative. Conclusion: Primary intraocular lymphoma should be considered in young adults suffering from chronic recalcitrant panuveitis.

  20. IDENTIFICATION OF INTRAOCULAR LENS CONSTITUTIVE PARAMETERS USING MIXED NUMERICAL-EXPERIMENTAL METHOD%混合数值-实验方法识别人工晶体本构模型参数

    Institute of Scientific and Technical Information of China (English)

    马希钦; 杨昌棋; 唐亮

    2011-01-01

    Owing to its particular structure and preparation technique, the mechanical parameters of intraocular lens are hard to obtain by means of standard methods. A mixed numerical-experimental method is used to identify the parameters in Mooney-Rivlin constitutive model of intraocular lens. The result shows that perfect identification precision can be obtained using Mooney-Rivlin model in certain deformation range of intraocular lens. Moreover, we simulate the implantation process and operation state of intraocular lens using finite element numerical simulation. The method solves the problem of acquiring materials parameters to a large extent,meanwhile, and lays a foundation for wide application of finite element numerical simulation technique in the biomedical field.%利用混合数值-实验材料参数识别方法成功识别出人工晶体本构模型参数,并利用识别后的参数对人工晶体植入囊袋的过程和运行状态进行了数值模拟.参数识别结果显示,在一定的变形范围内Mooney-Rivlin模型可以描述人工晶体的力学特性并能得到很好的识别精度.这一方法能够在很大程度上解决生物医学领域材料力学性能参数难以获取的问题,为有限元数值模拟技术在生物医学领域的进一步广泛应用打下了基础.

  1. Observation of the Effect of Small Incision Extracapsular Cataract Extraction and Intraocular Lens Implantation%探析小切口无缝线白内障囊外摘除加人工晶体植入效果观察

    Institute of Scientific and Technical Information of China (English)

    韩艳秋

    2015-01-01

    目的:探讨小切口无缝线白内障囊外摘除加人工晶体植入的效果。方法白内障患者65例,对照组患者使用大切口白内障囊外摘除加人工晶体植入术进行治疗,观察组患者使用小切口无缝线白内障囊外摘除加人工晶体植入术进行治疗。结果经过治疗后,观察组患者的效果明显优于对照组患者,P<0.05。结论小切口无缝线白内障囊外摘除加人工晶体植入在治疗白内障中具有良好的效果。%ObjectiveTo investigate the small incision without suture cataract extracapsular extraction and intraocular lens implantation. Methods65 cases of cataract patients, patients in the control group using a large incision extracapsular cataract extraction and intraocular lens implantation for treatment, patients in the observation group using small incision extracapsular cataract extraction and intraocular lens implantation for treatment.Results after treatment, the effect of observation group of patients is better than the control group,P<0.05.Conclusion Small incision without suture cataract extracapsular extraction and intraocular lens implantation in the treatment of cataract has good effect.

  2. 人工晶状体植入术治疗白内障对视觉质量的影响分析%Effect of Intraocular Lens Implantation on the Visual Quality of Cataract

    Institute of Scientific and Technical Information of China (English)

    王雪娇

    2016-01-01

    目的:探讨人工晶状体植入术治疗白内障对视觉质量的影响。方法将106例老年性白内障患者分为研究组(非球面人工晶状体植入术)与对照组(球面人工晶状体植入术),对比治疗效果。结果研究组视觉质量优于对照组(P<0.05),视功能优良率92.5%高于对照组的71.7%(P<0.05)。结论白内障患者采用人工晶状体植入术治疗能提升视觉质量。%ObjectiveTo investigate the effect of intraocular lens implantation for the treatment of cataract on visual quality.Methods 106 cases of senile cataract patients were divided into study group (aspheric intraocular lens implantation) and control group (spherical intraocular lens implantation),and compared the treatment effect. Results The study group with better visual quality than control group(P<0.05),the excelent and good rate was 92.5%,higher than that of the control group of 71.7% (P<0.05).Conclusion Cataract patients by intraocular lens implantation for the treatment can improve the visual quality.

  3. A Comparison of the American Society of Cataract and Refractive Surgery post-myopic LASIK/PRK Intraocular Lens (IOL calculator and the Ocular MD IOL calculator

    Directory of Open Access Journals (Sweden)

    Hsu M

    2011-09-01

    Full Text Available David L DeMill1, Majid Moshirfar1, Marcus C Neuffer1, Maylon Hsu1, Shameema Sikder21John A Moran Eye Center, University of Utah, Salt Lake City, UT, USA; 2Wilmer Eye Institute, Johns Hopkins University, Baltimore, MD, USABackground: To compare the average values of the American Society of Cataract and Refractive Surgery (ASCRS and Ocular MD intraocular lens (IOL calculators to assess their accuracy in predicting IOL power in patients with prior laser-in-situ keratomileusis (LASIK or photorefractive keratectomy.Methods: In this retrospective study, data from 21 eyes with previous LASIK or photorefractive keratectomy for myopia and subsequent cataract surgery was used in an IOL calculator comparison. The predicted IOL powers of the Ocular MD SRK/T, Ocular MD Haigis, and ASCRS averages were compared. The Ocular MD average (composed of an average of Ocular MD SRK/T and Ocular MD Haigis and the all calculator average (composed of an average of Ocular MD SRK/T, Ocular MD Haigis, and ASCRS were also compared. Primary outcome measures were mean arithmetic and absolute IOL prediction error, variance in mean arithmetic IOL prediction error, and the percentage of eyes within ±0.50 and ±1.00 D.Results: The Ocular MD SRK/T and Ocular MD Haigis averages produced mean arithmetic IOL prediction errors of 0.57 and –0.61 diopters (D, respectively, which were significantly larger than errors from the ASCRS, Ocular MD, and all calculator averages (0.11, –0.02, and 0.02 D, respectively, all P < 0.05. There was no statistically significant difference between the methods in absolute IOL prediction error, variance, or the percentage of eyes with outcomes within ±0.50 and ±1.00 D.Conclusion: The ASCRS average was more accurate in predicting IOL power than the Ocular MD SRK/T and Ocular MD Haigis averages alone. Our methods using combinations of these averages which, when compared with the individual averages, showed a trend of decreased mean arithmetic IOL

  4. Correção do astigmatismo irregular com lente intraocular tórica em um paciente com catarata e degeneração marginal pelúcida: relato de caso Toric intraocular lens implantation for cataract and irregular astigmatism related to pellucid marginal degeneration: case report

    Directory of Open Access Journals (Sweden)

    Ana Luiza Biancardi

    2012-12-01

    Full Text Available A degeneração marginal pelúcida (DMP é uma rara ectasia corneana cuja progressão resulta em astigmatismo irregular e baixa visual não corrigidos com óculos ou lentes de contato. O presente relato descreve um paciente com catarata e DMP que foi tratado com facoemulsificação e implante de lente intraocular tórica com recuperação da acuidade visual em ambos os olhos.Pellucid marginal degeneration (PMD is a rare corneal ectasia and its progression leads to irregular astigmatism and low vision that can not have spectacles or contact lens correction. This report describes a patient with low vision due to cataract and PMD that was treated with phacoemulsification and implantation of a toric intraocular lens with a satisfactory visual acuity outcome.

  5. Evaluation of Bigbag intraocular lens implantation for cataract with high myopia%高度近视白内障Bigbag人工晶状体的植入的评价

    Institute of Scientific and Technical Information of China (English)

    杨涛; 肖庆

    2014-01-01

    Objective To evaluate the clinical efficacy and safety of phacoemulsification combined with Bigbag intraocular lens implantation for cataract with high myopia.Methods 52 eyes of 42 cases with high mpopia and cataract underwent phacoemulsification combined with Bigbag intraocular lens implantation.The clinical effect,intraoperative and postoperative complications were observed.Results The visual acuities of all cases were improved at different degrees.The complications,such as posterior capsular folds,retinal detachment or macular edema were not found after surgery.Conclusion Phacoemulsification combined with Bigbag intraocular lens implantation is safe and effective for cataract with high myopia.%目的 评价高度近视白内障行超声乳化联合Bigbag人工晶状体植入的有效性及安全性.方法 对42例(52眼)高度近视行超声乳化联合Bigbag人工晶状体植入术.观察术中术后并发症及手术效果.结果 52眼术后视力均有不同程度提高,术后未见后囊皱褶、视网膜脱离或黄斑水肿等并发症.结论 高度近视植入Bigbag人工晶状体是安全有效的.

  6. Assessing the effect of laser beam width on quantitative evaluation of optical properties of intraocular lens implants

    Science.gov (United States)

    Walker, Bennett N.; James, Robert H.; Chakravarty, Aurin; Calogero, Don; Ilev, Ilko K.

    2014-05-01

    The design and manufacture of intraocular lenses (IOLs) depend upon the identification and quantitative preclinical evaluation of key optical properties and environmental parameters. The confocal laser method (CLM) is a new technique for measuring IOL optical properties, such as dioptric power, optical quality, refractive index, and geometrical parameters. In comparison to competing systems, the CLM utilizes a fiber-optic confocal laser design that significantly improves the resolution, accuracy, and repeatability of optical measurements. Here, we investigate the impact of changing the beam diameter on the CLM platform for the evaluation of IOL dioptric powers. Due to the Gaussian intensity profile of the CLM laser beam, the changes in focal length and dioptric power associated with changes in beam diameter are well within the tolerances specified in the ISO IOL standard. These results demonstrate some of the advanced potentials of the CLM toward more effectively and quantitatively evaluating IOL optical properties.

  7. Effect of Posterior Phakic Intraocular Lens on Axis Oculi Measurement and Structure Stabilization of Inner Axi-al Direction in High Myopia Patients with Cataract%高度近视合并白内障后房型PIOL植入对眼轴测量、内轴向结构稳定的影响

    Institute of Scientific and Technical Information of China (English)

    徐洁; 韩红

    2016-01-01

    Objective To observe the effect of different posterior phakic intraocular lens ( PIOL) on axis oculi measurement and structure stability of inner axial space in high myopia patients with cataract. Methods A total of 106 patients (168 eyes) underwent cataract phacoemulsification combined with PIOL implantation during July 2012 and July 2015, and were divided into phakic refractive lens group (PRL group, n=81) and implantable contact lens group (ICL group, n=87) according to implanted PIOL types. The axis oculi length were measured before and after the operation, and the correlation was analyzed in the two groups, and the changes of anterior chamber depth before and after the opera-tion was observed. Results The axis oculi length and best corrected visual acuity were improved after the operation com-pared with those before the operation in the two groups;in PRL group, axis oculi length was longer, but the best correc-ted visual acuity was lower than those in ICL group (P<0. 05). The axis oculi differences before and after the operation showed that the value was reduced in PRL group and increased in ICL group with the extensing length with little fluctua-tion range. The values of anterior chamber depth were lower after the operation than those before the operation in the two groups, but the value in PRL group was higher than that of ICL group ( P<0. 05 ) . Conclusion The posterior phakic intraocular lens for high myopia patients with cataract has little effect on axis oculi measurement, and is helpful for struc-ture stability of inner axial space, but different PIOL materials have different levels of stability.%目的 观察高度近视合并白内障植入不同后房型有晶状体眼人工晶状体(phakic intraocular lens,PI-OL)对眼轴测量及内轴向空间结构稳定性的影响.方法 2012年7月—2015年7月对106例(168只眼)行白内障超声乳化吸出术联合PIOL植入术,根据患者植入PIOL类型分为有晶状体眼屈光镜(phakic refractive

  8. Clinical analysis of 46 cases of ocular trauma underwent secondary suspended intraocular lens implantation%眼外伤后行二期悬吊人工晶状体植入46例临床分析

    Institute of Scientific and Technical Information of China (English)

    蔡莉莉

    2015-01-01

    Objective To investigate the methods and results of ocular trauma underwent seeondary suspended intraocular lens implantation.Methods Forty-six cases of ocular trauma after surgical treatment showed aphakia.After they were implemented the secondary suspended intraocular lens implantation,their visual acuity before and after surgery,intraocular pressure changes and the incidence of complications were recorded and statistically analyzed after conclusion.Results After 46 cases of ocular trauma patients was conducted the secondary suspended intraocular lens implantation surgery,their visual acuity all significantly improved than before the treatment (P < 0.05),whereas no significant change in terms of intraocular pressure(P > 0.05).The complication incidence was 21.74% (10/46),of which the highest was ocular hypertension (8.70%).Conclusions Secondary suspended intraocular lens implantation after ocular trauma can significantly improve visual acuity,improve patient outcomes and prognosis,protect their quality of life.%目的 探讨眼外伤后行二期悬吊人工晶状体植入的方法及效果.方法 46例眼外伤患者经一期手术治疗后均呈现无晶状体眼,实施二期悬吊人工晶状体植入手术治疗,记录其手术前后视力、眼压变化情况及并发症发生率,进行统计学分析.结果 46例眼外伤患者经二期悬吊人工晶状体植入手术治疗后,其视力均较治疗前显著改善(P<0.05),而眼压则较治疗前无明显变化(P>0.05),相关并发症发生率为21.74%(10/46),其中高眼压发生率最高(8.70%).结论 眼外伤后给予二期悬吊人工晶状体植入手术治疗可显著改善患者视力,提高患者疗效及预后,保障其生活质量.

  9. Biometria ultrassônica no cálculo do poder dióptrico de lentes intraoculares: estudo comparativo dos métodos de contato e de imersão Ultrasound biometry and intraocular lens power calculation: comparative study of the contact and immersion techniques

    Directory of Open Access Journals (Sweden)

    Felipe Cortizas Ré Martins

    2009-08-01

    Full Text Available Objetivo: Comparar as medidas ecobiométricas pelos métodos de imersão e de contato. Métodos: A biometria ultrassônica foi realizada em 60 olhos, pelo mesmo examinador e com o mesmo aparelho, usando os métodos de contato e de imersão em cada olho. Resultados: A menor média do comprimento axial (23,16 mm foi obtida através do método de contato, e a maior (23,29 mm sob imersão, usando a mesma sonda ultrassônica. A média do desvio padrão entre as repetidas medidas no mesmo olho foi menor (0,02 com a técnica de imersão, e a maior (0,07 com o método de contato, diferença estatisticamente significante (pPurpose: To compare the ultrasound biometry measurements between immersion and contact techniques. Methods: The biometry was made in 60 eyes by the same examiner, using the contact and immersion techniques in each eye. Results: The lower mean axial length (23,16 mm was found in the contact technique, and the greater (23,29 was found in the immersion technique, using the same probe. The lower mean standard deviation between recurrent measures in the same eye was found in the immersion technique, and the greater in the contact procedure, and was found statistically significant (p<0,001. The Pearson's coefficients demonstrated high correlation between the two techniques, in measuring the axial length and anterior chamber depth. Conclusion: The immersion technique have shown more accuracy and reproducibility, avoiding errors in intraocular lens power calculation, and encountering the visual expectations of the patient.

  10. Qualidade de vida de pacientes pseudofácicos submetidos à cirurgia de catarata com implante de lente intra-ocular acomodativa Quality of life of pseudophakic patients with accommodative intraocular lens implant

    Directory of Open Access Journals (Sweden)

    Filipe de Oliveira

    2004-06-01

    Full Text Available OBJETIVO: Avaliar a função visual e satisfação dos pacientes submetidos à cirurgia de catarata com implante de lente intra-ocular acomodativa e o impacto na sua qualidade de vida. MÉTODOS: Retrospectivamente, foram avaliados questionários aplicados após um ano da cirurgia de 22 pacientes que foram incluídos num estudo clínico para avaliar segurança e eficácia de uma lente intra-ocular de silicone de câmara posterior designada para corrigir visão para longe e perto. RESULTADOS: Do total dos pacientes operados, 16 (73% eram bilaterais e 6 (27% unilaterais, com idade média de 70,2 anos. Dos pacientes com implante unilateral, 5 (83,3% declararam melhora acentuada da visão e 1 (16,7% referiu máxima melhora. Quanto ao nível de satisfação, 5 (83,3% ficaram satisfeitos e 1 (16,7% muito satisfeito com o resultado cirúrgico. A visão noturna foi declarada como sem dificuldade por 3 (50,0%, pouca dificuldade por 2 (33,3% e dificuldade moderada por 1 (16,7%. No grupo bilateral, 7 (43,8% consideraram excelente a qualidade da visão para perto, 7 (43,8% muito boa, 1 (6,2% adequada e 1 (6,2% ruim. A visão intermediária foi classificada como excelente por 6 (37,5%, muito boa por 9 (56,3% e adequada por 1 (6,2%. A qualidade da visão para longe foi considerada excelente por 9 (56,3%, muito boa por 3 (43,8%, adequada por 2 (12,5% e não muito boa por 2 (12,5%. Em relação à visão noturna 9 (56,3% declararam não ter dificuldade alguma, 5 (31,2% pouca dificuldade e 2 (12,5% dificuldade moderada. CONCLUSÕES: Considerando a propriedade óptica da LIO, a maioria dos pacientes apresentou uma melhora considerável da função visual, sem a necessidade de correção óptica, e, portanto, com impacto positivo na qualidade de vida.PURPOSE: To evaluate the visual function and satisfaction of patients who underwent cataract surgery and were implanted with an accommodative intraocular lens and the impact in their quality of life. METHODS

  11. Implantation of refractive multifocal intraocular lens with a surface-embedded near section for cataract eyes complicated with a coexisting ocular pathology

    Science.gov (United States)

    Ouchi, M; Kinoshita, S

    2015-01-01

    Purpose To evaluate the postoperative outcomes of cataract eyes complicated with coexisting ocular pathologies that underwent implantation of a refractive multifocal intraocular lens (MIOL) with a surface-embedded near section. Methods LENTIS MPlus (Oculentis GmbH) refractive MIOLs were implanted in 15 eyes with ocular pathologies other than cataract (ie, six high-myopia eyes with an axial length longer than 28 mm, two fundus albipunctatus eyes, two branch retinal-vein occlusion eyes, four glaucoma eyes (one with high myopia), and two keratoconus eyes). Uncorrected or corrected distance and near visual acuity (VA) (UDVA, UNVA, CDVA, and CNVA), contrast sensitivity, and defocus curve were measured at 1 day and 6 months postoperatively, and each patient completed a 6-month postoperative questionnaire regarding vision quality and eyeglass use. Results Thirteen eyes (87%) registered 0 or better in CDVA and 12 eyes (73%) registered better than 0 in CNVA. Contrast sensitivity in the eyes of all patients was comparable to that of normal healthy subjects. No patient required eyeglasses for distance vision, but three patients (20%) required them for near vision. No patient reported poor or very poor vision quality. Conclusion With careful case selection, sectorial refractive MIOL implantation is effective for treating cataract eyes complicated with ocular pathologies. PMID:25744442

  12. Comparison of posterior capsule opacification at 360-degree square edge hydrophilic and sharp edge hydrophobic acrylic intraocular lens in diabetic patients

    Institute of Scientific and Technical Information of China (English)

    Ling; Bai; Jin; Zhang; Ling; Chen; Ting; Ma; Hou-Cheng; Liang

    2015-01-01

    ·AIM: To compare posterior capsule opacification(PCO)degree and visual functions after phacoemulsification in eyes implanted with 360-degree square edge hydrophilic acrylic intraocular lens(IOL)(570C C-flex, Rayner) and sharp edge hydrophobic acrylic IOL(Sensar AR40 e,AMO) in diabetic patients.· METHODS: Sixty diabetic patients underwent uneventful phacoemulsification and randomly implanted one of the two IOLs. The PCO value was measured by retroillumination photographs and Evaluation of Posterior Capsule Opacification(EPCO) 2000 image-analysis software at 1, 6, 12, and 24 mo after surgery. Visual acuity, and contrast sensitivity in photopic and mesopic conditions were also examined at each follow up time point. The incidence of eye that required Nd:YAG laser posterior capsulotomy were also compared.·RESULTS: There was not any statistically significant difference in PCO scores between Rayner C-flex 570 C group and Sensar AR40 e group at each follow up time point. Visual acuity, Nd:YAG capsulotomy incidence and contrast sensitivity also had no significant difference during the 24 mo follow-up.·CONCLUSION: For diabetic patients, Rayner 570 C Cflex and Sensar AR40 e IOLs are same effective for prevent PCO. The 360-degree square edge design maybe is a good alternative technique to improve PCO prevention.

  13. Incidence of posterior capsule opacification following the implantation of a foldable hydrophilic acrylic intraocular lens: a 4 year follow-up study

    Directory of Open Access Journals (Sweden)

    Priscilla de Almeida Jorge

    2014-08-01

    Full Text Available Purpose: To evaluate the incidence of posterior capsule opacification (PCO four years after the implantation of a hydrophilic acrylic intraocular lens (IOL. Methods: Fifty-eight randomly selected eyes from 58 patients were analyzed four years after phacoemulsification and Ioflex IOL implantation. The patients underwent an ophthalmic examination to detect PCO and a detailed medical history was obtained. The patients' charts were reviewed for their corrected distance visual acuity prior to the IOL implantation, as well as for one month postoperatively. The Student's t-test was used for statistical analysis. Results: The mean age of patients without PCO was 74.6 ± 9.5 years, compared to 70.3 ± 15 years in patients with PCO. Four years after surgery, 39 of the 58 eyes (67% had detectable PCO and 24 eyes (41.3% had decreased visual acuity (VA due to PCO. These patients were referred for Nd:YAG laser capsulotomy. Three patients (5.1% had decreased VA due to glaucoma, IOL opacification, or age-related macular degeneration. Twelve eyes (20.7% presented mild PCO with unchanged VA. Systemic arterial hypertension was reported by 45% of the patients, and in 3.5% of these cases this was associated with diabetes mellitus. Conclusion: This study found the incidence of PCO to be 67% four years after phacoemulsification and Ioflex IOL implantation.

  14. Pupil-occluding organized hyphema anterior to the intraocular lens treated by neodymium: yttrium-aluminum-garnet laser: a case report

    Science.gov (United States)

    Kim, Moosang; Lee, Seung-Jun; Han, Sang Beom; Yang, Hee Kyung; Hyon, Joon Young

    2016-01-01

    We report, to our best knowledge, the first case of treatment of pupil-occluding postoperative organized hyphema anterior to the intraocular lens (IOL) using neodymium: yttrium-aluminum-garnet (Nd:YAG) laser. A 78-year-old Asian female underwent uneventful cataract operation. She had been taking aspirin, which she discontinued 1 week before surgery. Iris prolapse occurred at the end of the surgery, which led to intracameral bleeding. Two weeks later, her best-corrected visual acuity was hand motion. Although hyphema had decreased, pupil-occluding organized hematoma had formed anterior to the IOL. The blood clot anterior to the IOL was removed using Nd:YAG laser. One week later, although the hematoma anterior to the IOL resolved, endocapsular hematoma was observed, which was dispersed with Nd:YAG laser posterior capsulotomy. Two weeks later, her best-corrected visual acuity improved to 20/60. There was no complication associated with Nd:YAG laser. In conclusion, pupil-occluding organized hyphema anterior to the IOL can occur as a complication of cataract surgery, in which Nd:YAG laser can be a useful treatment option. PMID:27462181

  15. Evaluation of Changes in Anterior Segment Configuration by Ultrasound Biomicroscopy after Phacoemulsification and Foldable Intraocular Lens Implantation

    Directory of Open Access Journals (Sweden)

    ilhami Salcan

    2011-08-01

    Full Text Available Purpose: To quantify the configuration changes in anterior segment structures after cataract extraction using ultrasound biomicroscopy (UBM. Material and Method: 33 eyes of 33 patients (21 male, 12 female; mean age: 69.0±8.3 years with senile or presenile cataracts undergoing cataract surgery were prospectively studied. UBM was performed for each patient before and 1 month after surgery. At each UBM examination, axial images of the anterior chamber and radial sections of the angle in four quadrants were obtained. The measurements were performed by using the calipers included in the equipment software and UBM Pro2000® software. Results: After cataract surgery, we determined statistically significant increases in anterior chamber depth and angle parameters (p=0.001. We found that the postoperative increases in anterior chamber depth, angle recess area, angle opening distance 250 and angle opening distance 500 were 1.3, 1.4, 1.7 and 1.5 times, respectively, when compared with the preoperative levels. Decreases in acceleration and increases in y-intercept were determined in 4 quadrants postoperatively by of linear regression analysis of anterior chamber angle and these were also statistically significant (p=0.001. Discussion: UBM gives both qualitative and quantitative valuable information about anterior segment structures. We think that UBM may be a useful tool for evaluation of patients with cataract and occludable and/or narrow angles undergoing cataract surgery for therapeutic purpose. (Turk J Ophthalmol 2011; 41: 200-6

  16. A Clinical Analysis of 120 Cases with Traumatic Cataract Treated by Extracapsular Cataract Extraction and Posterior Chamber Intraocular Lens Implantation

    Institute of Scientific and Technical Information of China (English)

    汤崇凯; 马赛芬

    1998-01-01

    IntroductionExtracapsularcataractextraction(ECCE)combinedwithposteriorchamberintraocularlens(PC-IOL)implantationwasperformedo...

  17. Visual quality of multifocal, accommodative and monofocal intraocular lens: a comparative study of 139 eyes%多焦点、可调节和单焦点人工晶状体临床视觉质量的观察

    Institute of Scientific and Technical Information of China (English)

    郑登易; 叶剑; 谭薇

    2012-01-01

    目的 比较植入多焦点( multifocal intraocular lenses,MIOL)、可调节(accommodative intraocular lens,AIOL)和单焦点( monofocal/single focus intraocular lens,SIOL)人工晶状体植入术后的视觉质量.方法 采用同期随机对照研究,选取2010年9月至2011年4月期间,在本科行白内障超声乳化联合人工晶状体植入术的患者,分别植入3种人工晶状体,其中多焦点ZMA00组30例(43只眼),可调节FLEX组33例(49只眼),单焦点AKROS组32例(47只眼).术后1d,1、3个月随访,测定患者裸眼及矫正远视力、矫正远视力下近视力及中视力;离焦法测伪调节力;MFVA-100多功能视力检测仪测量对比敏感度视力,并问卷调查其脱镜率.结果 裸眼远视力ZMA00组和FLEX组略高于AKROS组,但差异无统计学意义(P>0.05),矫正远视力3组无明显差异(P>0.05);矫正远视力下中视力,ZMA00和FLEX组均明显优于AKROS组(P<0.05),但ZMA00和FLEX 2组间无差异(P>0.05);矫正远视力下近视力及人工晶体眼伪调节力均表现为ZMA00组最佳,FLEX组次之,AKROS组最低,差异有统计学意义(P<0.05).脱镜率ZMA00组86.7%( 26/30),FLEX组63.6%(21/33),均优于AKROS组18.8%(6/32),差异有统计学意义(P<0.05);在各百分比对比度下,3组患者的对比敏感度视力无显著差异(P>0.05).结论 3种人工晶状体均可获得较好的远视力,但多焦点和可调节人工晶状体均拥有更佳的远、中、近视力及较高的调节力和脱镜率.非球面多焦点人工晶状体未带来对比敏感度的缺失,且在近视力及伪调节力方面,比可调节人工晶状体具有更大的优势.%Objective To assess the visual outcomes of the 3 types of intraocular lens, multifocal intraocular lens ( MIOL ZMAOO) , accommodating intraocular lens (AIOL, FLEX) and monofocal/single focus intraocular lens (SIOL, AKROS), in the treatment of phacoemulsification for the patients with age-related cataract. Methods A randomized

  18. Noncontact common-path Fourier domain optical coherence tomography method for in vitro intraocular lens power measurement

    Science.gov (United States)

    Huang, Yong; Zhang, Kang; Kang, Jin U.; Calogero, Don; James, Robert H.; Ilev, Ilko K.

    2011-12-01

    We propose a novel common-path Fourier domain optical coherence tomography (CP-FD-OCT) method for noncontact, accurate, and objective in vitro measurement of the dioptric power of intraocular lenses (IOLs) implants. The CP-FD-OCT method principle of operation is based on simple two-dimensional scanning common-path Fourier domain optical coherence tomography. By reconstructing the anterior and posterior IOL surfaces, the radii of the two surfaces, and thus the IOL dioptric power are determined. The CP-FD-OCT design provides high accuracy of IOL surface reconstruction. The axial position detection accuracy is calibrated at 1.22 μm in balanced saline solution used for simulation of in situ conditions. The lateral sampling rate is controlled by the step size of linear scanning systems. IOL samples with labeled dioptric power in the low-power (5D), mid-power (20D and 22D), and high-power (36D) ranges under in situ conditions are tested. We obtained a mean power of 4.95/20.11/22.09/36.25 D with high levels of repeatability estimated by a standard deviation of 0.10/0.18/0.2/0.58 D and a relative error of 2/0.9/0.9/1.6%, based on five measurements for each IOL respectively. The new CP-FD-OCT method provides an independent source of IOL power measurement data as well as information for evaluating other optical properties of IOLs such as refractive index, central thickness, and aberrations.

  19. Sulcus fixated foldable intraocular lens implanted by injector in aphakia after vitrectomy%玻璃体切除术后无晶状体眼悬吊式折叠人工晶状体推注植入术

    Institute of Scientific and Technical Information of China (English)

    翁晓春

    2014-01-01

    Objective To evaluate the clinical effect of sulcus fixated foldable intraocular lens implanted by injector in aphakia after vitrectomy.Methods 31 eyes of 31 cases of aphakia after vitrectomy were treated by sulcus fixated foldable intraocular lens implanted by injector.The surgery was performed under stable irrigation and the incision was made at upper limbus.The suspensory suture was placed at 2 o' clock and 8 o' clock.Then the foldable intraocular lens implanted by injector was sutured and localized at ciliary sulcus.Results The surgery was successfully performed in 30 cases and failed in 1 case due to small amount sub choroidal expulsive hemorrhage.Of these 30 cases,the intraocular lens was centered and the intraocular pressure was normal.The surgical complications included retinal detachment in 1 cases at 2 weeks postoperatively which were treated by vitrectomy,and intraocular lens dislocation in 1 case at 6 months postoperatively which was reset by operation.The visual acuities of 31 cases achieved expected visual acuity.Conclusion Sulcus fixated foldable intraocular lens implanted by injector in aphakia eye after vitrectomy has small incision,which minimizes surgery induced astigmatism,and avoid the risk of intraoperative hypotension.%目的 探讨玻璃体切除术后无晶状体眼悬吊式折叠人工晶状体推注器植入术的效果.方法 31例(31眼)建立灌注后,做上方角巩膜隧道切口,8点、2点位予置悬吊线并引出切口外.折叠式人工晶状体装入推注器后推至晶状体袢稍露出,8点位悬吊线打结于晶状体袢.推注器进入前房后植入人工晶状体.末端晶体袢露出隧道切口外,2点位悬吊线打结于另一袢并送入前房,再调整到后房正位后固定悬吊线.结果 30例手术顺利.术后人工晶状体正位.眼压正常,术中1例发生脉络膜下少量出血.术后6个月1例发生人工晶状体脱位再次手术正位,1例术后2周发生视网膜脱离,

  20. Anterior chamber depth and lens thickness in primary angle-closure glaucoma : A case-control study

    Directory of Open Access Journals (Sweden)

    Saxena Sandeep

    1993-01-01

    Full Text Available Anterior chamber depth and lens thickness have been considered as important biometric determinants in primary angle-closure glaucoma (PACG. In a tertiary care centre-based case-control study, 70 patients and equal number of controls were investigated to analyse the strength of association and predictability of anterior chamber depth (ACD and lens thickness (LT in the disease. Mean (+/- S.D. ACD and LT in the cases and the controls were found to be 2.28 +/- 0.19, 2.87 +/- 0.10; 4.57 +/- 0.34 and 4.13 +/- 0.19 mm respectively. Two sample t test demonstrated statistically significant difference in the ACD and LT between the cases and the controls (Difference being -0.59, 0.44; 95% confidence interval of the difference: -0.64, -0.53 and 0.34, 0.53 respectively, P < 0.01. Logistic regression analysis demonstrated statistically significant protective effect of ACD over PACG (P < 0.01. The odds ratio corresponding to an increase of 0.01 mm in ACD and LT were computed as 0.83 and 1.11 respectively

  1. Quality of vision through diffractive bifocal intraocular lenses.

    OpenAIRE

    Jay, J L; Chakrabarti, H S; Morrison, J D

    1991-01-01

    Two elderly women have each received a monofocal intraocular lens in one eye and a 3M diffractive bifocal intraocular lens in the other eye. Both eyes were shown to have equivalent retinal/neural function by measuring contrast sensitivity to laser interference fringes which bypassed refractive and other defects of the ocular media. The eyes with a bifocal intraocular lens displayed a much greater depth of focus, though at the expense of diminished contrast sensitivity compared with the normal...

  2. Clinical research on movement of intraocular contact lens during accommodation%调节状态下眼内接触镜在眼内位移的临床观察

    Institute of Scientific and Technical Information of China (English)

    董喆; 王宁利; 付晶; 李树宁; 李德娇

    2009-01-01

    Objective To study the movement of intraocular contact lens (ICL) during accommodation.Methods Forty one eyes of 41 consecutive patients implanted ICL to correct high myopia were collected.The visual acuity and accommodation power were checked before and after the surgery.The movement of both the ICL and the lens was measured separately at nonaccommodated state and pilocarpine induced accommodation.Results The uncorrected visual acuity (UCVA) and best corrected visual acuity (BCVA) improved 3 months after surgery.The mean accommodation power betore surgery was(2.12±1.06)D,and was(4.46±2.11)D 3 months after surgery.Accommodation power was improved significantly (t=2,312,P=0.022).The distance from the posterior surface of ICL to the anterior surface of the lens was (0.48±0.27)mm at nonaccommodated state,and (0.34±0.19) mm at drug induced accommodation,the difference was significant (t=2.104,P=0.038).The position from corneal endothelium to the anterior surface of ICL had no significant difference at nonaccommodated state and drug induced accommodation(t= 1.165,P=0.149).Depth of the anterior chamber (from the posterior surface of the cornea to the anterior surface of the lens) between nonaccommodated and drug-induced accommodation had no statistically significant difference(t=1.821,P=0.071),but the anterior pole of the lens actually moved forward at drug induced accommodation checked with slit lamp.With ultrasound biomicroscopy we could see that in several surgical eyes, ICL loop contacted with periphery lens beth in nonaccommodated state and drug induced accommodation condition.Conclusions Although the constriction of pupil induced by pilocarpine decreases the distance from the posterior surface of ICL to the anterior lens surface significantly,there still has enough space to avoid the occurrence of subeapsular cataract.The contact between ICL loop and periphery lens might be one of the causes for periphery lens opacification.but the influence of this contact to

  3. Ocular Toxicity after High-Dose Cefuroxime Injection into the Anterior Chamber

    Directory of Open Access Journals (Sweden)

    Harun Çakmak

    2016-08-01

    Full Text Available Cephalosporins are beta-lactam antibiotics and, like penicillin derivatives, they show bacteriostatic effect by disrupting bacterial cell wall synthesis. Cefuroxime is a second generation cephalosporin and the use of intracameral cefuroxime after cataract surgery has been widely used in the endophthalmitis prophylaxis. A 78-year-old male patient was operated for cataracts in both eyes about 8 years ago. Ocular trauma has occurred in the left eye nine months ago. Vitrectomy surgery combined with intraocular lens extraction was performed and the patient was left aphakic. Secondary intraocular lens implantation was performed. In this paper, we present postoperative ocular findings in a patient who was given cefuroxime into the anterior chamber 2.5 times higher than the recommended dose (25 mg/ml after secondary intraocular lens implantation.

  4. Contrast sensitivity and spherical aberration in eyes implanted with AcrySof IQ and AcrySof Natural intraocular lens: the results of a meta-analysis.

    Directory of Open Access Journals (Sweden)

    Jianping Liu

    Full Text Available BACKGROUND: To systematically evaluate the visual performance of aspheric AcrySof IQ and spherical AcrySof Natural intraocular lens (IOL after cataract surgery. METHODOLOGY/PRINCIPAL FINDINGS: Potential randomized controlled trials (RCTs that involved implanting AcrySof IQ and AcrySof Natural were searched from PubMed, Web of science, EMBASE, Chinese Science and Technology Periodicals Databases and Cochrane Central Register of Controlled Trials. The methodological quality of the studies was assessed by the Jadad method. Standardized mean differences (SMDs with 95% confidence intervals (CIs of best-corrected visual acuity (BCVA, contrast sensitivity and spherical aberration were pooled using a random-effects model. Seven studies were identified and analyzed to compare AcrySof IQ (236 eyes with AcrySof Natural (232 eyes after phacoemulsification. There was no significant difference in postoperative BCVA between AcrySof IQ and AcrySof Natural (p =0.137 after a follow up of 3 months. For contrast sensitivity, these differences reached statistical significance under photopic conditions at two spatial frequencies (3 cycles per degree (cpd, 6 cpd, 12 cpd, and 18 cpd; p =0.022, p =0.017, p = 0.065, and p=0.191, respectively and under mesopic conditions at three spatial frequencies (3 cpd, 6 cpd, 12 cpd, and 18 cpd; p =0.007, p =0.033, p =0.030, and p =0.080, respectively. Eyes with AcrySof IQ also had statistically significant less spherical aberration than eyes with AcrySof Natural (p<0.001. Sensitivity analysis showed that the results were relatively stable and reliable. CONCLUSIONS/SIGNIFICANCE: The overall findings indicate that AcrySof IQ with a modified aspheric surface induced significantly less spherical aberration than AcrySof Natural. Contrast sensitivity in eyes with AcrySof IQ is better than that in eyes with AcrySof Natural, especially under mesopic conditions.

  5. Clinical observation of phakic intraocular lens implantation for correction of high myopia%有晶体眼后房型人工晶体植入矫治高度近视的临床观察

    Institute of Scientific and Technical Information of China (English)

    徐玉梅; 孟晓丽; 王丽强; 葛梅; 黄一飞

    2015-01-01

    Objective To evaluate the clinical efficacy of surgical correction for high myopia using phakic intraocular lens.Methods Clinical data about 80 eyes of 41 patients who had implantation of implantable contact lenses (ICL) for the correction of high myopia in Chinese PLA General Hospital from September 2011 to march2012 were retrospectively analyzed. There were 15 males and 26 females with the average age of (27.0±6.2) years old (range: 19-41 years old). The uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), manifest refraction spherical equivalent (MRSE), intraocular pressure (IOP), endothelial cell density (ECD), anterior chamber depth (ACD), space between crystalline lens and intraocular lens (vault) were tested and recorded preoperatively and followed at different time points postoperatively.Results The mean follow-up time was 12.3±3.1 months. Postoperative UCVA were improved in all eyes by 9 lines in snellen chart, with 91.3%≥0.5 and 71.25%≥1.0. BCVA were maintained or improved in all eyes, with 56.3% (45/80) improved by 1 line, 22.5% (18/80) by 2 lines, 3.7% (3/80) by 3 lines. The surgery efficacy index and safety index were 1.13±0.33 and 1.25±0.35, respectively. The mean MRSE was -11.62±3.37 D preoperatively and -0.15±0.96 D postoperatively, 68 eyes (87.5%) were within 1D of emmetropia, 51 eyes (63.8%) were within 0.5 D of emmetropia. Transient IOP elevation occurred in 7 eyes (8.75%) within 1 week postoperatively and stabilized after proper management. ECD was 2 861±413 /mm2 preoperatively and 2 682±498 /mm2 postoperatively, which showed no statistically significant difference (P>0.05). ACD was 3.21±0.25 mm preoperatively and 2.91±0.30 mm postoperatively, which showed statistically significant difference (P<0.01). The mean vault 1 month postoperatively was 711 +/- 354 µm with 8 eyes (10%)≥1 000 µm and 3 eyes (3.75%)≤200 µm. One eye (1.25%) reported glare and halo postoperatively.ConclusionICL implantation for the

  6. 小切口白内障摘除联合人工晶体植入术52例临床分析%Clinical analysis of 52 cases of small incision cataract extraction combined with intraocular lens implantation

    Institute of Scientific and Technical Information of China (English)

    阿西木

    2014-01-01

    目的:对小切口白内障摘除联合人工晶体植入术的临床疗效进行分析。方法选取我院52例白内障患者为例,所有患者均实施小切口白内障摘除联合人工晶体植入术进行治疗,观察和分析患者的手术治疗效果。结果患者术后显示视力水平有所改善,并发症患者经过处理均全部治愈。结论采用小切口白内障摘除联合人工晶体植入术对白内障患者进行治疗,创伤性小,治疗效果显著,安全性高,值得推广和普及。%Objective The clinical efficacy of small incision cataract extraction and intraocular lens implantation for analysis. Methods 52 cases of cataract patients in our hospital, for example, all patients were implementing small incision cataract extraction and intraocular lens implantation for treatment, observation and analysis of surgical treatment of patients. Results Postoperative patients showed improvement in visual acuity and complications in patients treated were cured. Conclusion the use of small incision cataract extraction and intraocular lens implantation for cataract treatment, traumatic small, significant treatment effect, safe, worthy of promotion and popularization.

  7. Comparison of the effects of two types of intraocular lens%弹性开放襻前房型与巩膜缝线固定襻后房型人工晶体植入术的疗效比较

    Institute of Scientific and Technical Information of China (English)

    陈伟蓉; 刘奕志; 王宁利; 郭彦; 何明光

    2001-01-01

    Objective To evaluate the effectiveness and safety of implantation of flexible open-loop anterior chamber intraocular lens (FOAC-IOLs) and scleral fixated posterior chamber intraocular lens (PC-IOLs).Methods Sixty-eight eyes of 68 patients with implanted intraocular lenses in the absence of posterior capsular support were reviewed retrospectively. According to the type of intraocular lens, patients were classified into two groups. In groupⅠ (30 eyes), FOAC-IOLs was implanted primarily or secondarily. In group Ⅱ (38 eyes), scleral fixated PC-IOLs was implanted primarily or secondarily. By gonioscopy and ultrasound biomicroscopy (UBM), accurate positions of IOLs' haptics and the relationship between the haptics and surrounding tissues were observed postoperatively and used to evaluate the influence of the two types of IOLs on ocular anterior segments. Follow-up was 6 to 20 months. Results Best corrected visual acuity of 20/40 or better was achieved in 27 eyes (90.0%) in group Ⅰ, and 35 eyes (92.1%) in group Ⅱ and the difference was not statistically significant (P>0.05). In group Ⅰ, 23 eyes (76.7%) had a total of 40 complications, while 13 eyes (34.2%) had 19 complications in group Ⅱ (P0.05)。在第一组有23只眼(76.7%)出现手术并发症,总并发症数为40次/眼;而在第二组分别为13只眼(34.2%)和19次/眼。两组比较有统计学意义(P<0.05)。超声生物显微镜和前房角镜检查显示:在第一组,所有的人工晶体襻均与虹膜完全接触,且不同程度压迫虹膜,甚至引起房角后退。虹膜前粘连12只眼。在60个人工晶体襻中,39个襻的固定脚板固定于睫状体带,其余21个襻(12只眼)穿过虹膜侵入到睫状体实质内,伴有反复发作的葡萄膜炎。在第二组的76个人工晶体襻中,52个襻固定于睫状体沟,8个襻(8只眼)固定在虹膜下,引起房角粘连。另外16个襻固定于睫状体冠部。结论巩膜缝线固定

  8. Management of endophthalmitis while preserving the uninvolved crystalline lens

    Directory of Open Access Journals (Sweden)

    Townsend J

    2012-03-01

    Full Text Available Justin Townsend, Avinash Pathengay, Harry W Flynn Jr, Darlene MillerDepartment of Ophthalmology, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL, USABackground: The purpose of this work is to report on the management of endophthalmitis in phakic eyes in which the crystalline lens was preserved.Methods: The current study is a noncomparative consecutive case series of patients who developed culture-proven endophthalmitis and were treated between January 1995 and June 2009. The study included only phakic patients whose infection was managed without removal of the crystalline lens. Using a computerized search of Microbiology Department records, patients were identified with phakic lens status and clinically diagnosed endophthalmitis.Results: A total of 12 phakic eyes from 11 patients met the study criteria. The etiology of infection was endogenous (n = 6, postoperative (n = 5, and post-traumatic (n = 1. Pars plana vitrectomy and injection of intravitreal antimicrobials was performed in seven eyes (58%, and vitreous tap and injection of antimicrobials was performed in five eyes (42%. All eyes showed progression of lens opacification after treatment. Overall, nine (75% achieved visual acuity outcomes ≥20/80, including five of seven (71% eyes treated with vitrectomy and four of five eyes (80% treated with injection of antibiotics alone. One of seven eyes (14% treated with vitrectomy had a poor visual outcome (defined as <20/400 compared with one of five (20% eyes treated with intravitreal antimicrobials alone. During follow-up, all 12 eyes had progression of lens opacification and five of 12 (42% eyes underwent cataract surgery with posterior chamber intraocular lens placement.Conclusion: In phakic patients, successful treatment of endophthalmitis can be achieved while preserving the uninvolved crystalline lens. Future cataract surgery with posterior chamber intraocular lens placement can be accomplished in many

  9. Effect of phacoemulsification and intraocular lens implantation combined with vitrectomy on the dynamic changes of intraocular pressure%超声乳化人工晶体植入术联合玻璃体切除术对眼内压动态变化的影响

    Institute of Scientific and Technical Information of China (English)

    王晓鹏

    2012-01-01

    Objective To investigate the effect of phacoemulsification and intraocular lens implantation combined with vitrectomy on the dynamic changes of intraocular pressure.Methods A sample of 73 eyes of 70 patients was divided into two groups according to the operation method.Phacoemulsification and intraocular lens combined with vitrectomy implantation performed on 38 eyes of 37 patients (study group) were compared with vitrectomy alone performed on 35 eyes of 33 patients (control group).The dynamic changes of intraocular pressure 1,2,3 days,1,3 weeks,1,2,3 months after surgery were observed.Results The intraocular pressure was peaked on the 1st day after surgery in control group from ( 13.7 ± 2.2)mm Hg ( 1 mm Hg =0.133 kPa) preoperatively to ( 18.5 ± 6.9) mm Hg postoperatively,and recovered the preoperative level on the 3rd day after surgery.The intraocular pressure was peaked on the 1st day after surgery in study group from ( 12.9 ± 2.4) mm Hg preoperatively to (23.4 ± 8.0) mm Hg postoperatively,and recovered the preoperative level on the 3rd week after surgery.The intraocular pressure in both groups displayed an significant elevation on postoperative days,although degree of intraocular pressure elevation in study group was higher than that in control group (P <0.05).The correlation analysis showed:diabetic retinopathy,and combined with cataract extraction and lens implantation were independent risk factors of intraocular pressure surge (the intraocular pressure ≥10 mm Hg) after vitrectomy. Conclusions Phacovitrectomy and intraocular lens implantation increases the risk of transient intraocular pressure elevation in early postoperative stage than vitrectomy alone.The patients who are vulnerable to intraocular pressure fluctuations when performed a combined surgery should be paid more attention.%目的 探讨超声乳化人工晶体植入术联合玻璃体切除术(PPV)对患者眼内压动态变化的影响.方法 选择需行PPV治疗患者70例(73眼)为研

  10. Application of intraocular lens in infant cataract surgery%IOL在婴幼儿白内障手术中的应用

    Institute of Scientific and Technical Information of China (English)

    祁锦艳; 肖伟; 王明玥; 濮伟

    2015-01-01

    Cataract extraction and the intraocular lens ( IOL ) implantation are the first choice to cure children cataract both domestic and overseas so far. However, IOL implantation in the eyes of children, especially in infant, has always been cared by ophthalmologists. Timely implanting IOL after the cataract extraction has played a significant role in terms of the refractive correction, the establishment of visual function, the prevention of amblyopia and the reconstruction of binocular vision. However, on the issue of IOL implantation after cataract extraction, there is always controversy on cataract treatment programs for children, and the focus of the controversy is when the IOL should be implanted. Theoretically, the principle of pediatric cataract surgery is the sooner the better, aiming to remove deprivation factor, open the visual pathway, implant IOL timely, and promote the visual development. How to find both“early” and safe IOL implantation time point is undoubtedly helpful for the rehabilitation of visual function of these children. The issues on the IOL implantation after children cataract extraction both at home and abroad are summarized below.%目前,国内外已将白内障摘除和人工晶状体( intraocularlens, IOL)植入作为治疗儿童白内障的首要选择。但是,儿童眼特别是婴幼儿眼的IOL植入一直是眼科界关注的问题。适时的白内障摘除术后IOL植入对于屈光矫正、视功能建立、预防弱视和双眼视功能重建都有极大的作用。然而,有关婴幼儿白内障摘除术后IOL植入问题,在儿童白内障治疗方案上始终存在争议,争议的焦点主要集中在IOL植入的时机问题上。理论上讲,儿童白内障的手术治疗原则是越早越好,目的是去形觉剥夺因素,打开视觉通路,及时植入IOL,促进视觉发育。但如何找到既“早”又安全的IOL植入时间点无疑对患儿视功能的康复是大有益处的,本文就国内外儿童

  11. Spectacle independence and subjective satisfaction of ReSTOR® multifocal intraocular lens after cataract or presbyopia surgery in two European countries

    Directory of Open Access Journals (Sweden)

    Béatrice Cochener

    2010-02-01

    Full Text Available Béatrice Cochener1, Luis Fernández-Vega2, Jose F Alfonso2, Frédérique Maurel3, Juliette Meunier4, Gilles Berdeaux5,61Centre Hospitalier de Brest, Brest, France; 2Instituto Oftalmologico Fernandez Vega, Oviedo, Spain; 3IMS Health, Health Economics Department, Puteaux, France; 4Mapi Values, Lyon, France; 5Alcon France, Health Economics Department, Rueil-Malmaison, France; 6Conservatoire National des Arts et Métiers, Paris, FrancePurpose: To determine the percentage of patients implanted bilaterally with ReSTOR® requiring spectacles at 18 months, the patient satisfaction, and factors that predict spectacles independence.Methods: The medical and surgical data were collected from patient records. The ‘Freedom from Spectacles Value Scale’ (FGVS was used to rank their experiences via telephone interview. A Bayesian network was used to predict postoperative spectacles use.Results: 304 patients (65.6 years were included. Postoperative visual acuity was ≥0.8 in 93.3% of patients for near vision and in 88.6% of patients for distance vision. After surgery, 87.2% of the patients were spectacles free. 88.2% of the patients rated their vision as being better following the surgery and 93.1% thought that surgery resulted in a positive change. FGVS mean scores (5 the most favorable rating were: ‘Practical Advantages’ 3.8, ‘Psychological Advantages’ 3.8, ‘Evaluation of the Result’ 4.5, ‘Feelings’ 4.4, and ‘Global Judgement’ 4.4. Patients who stated that spectacles wear was particularly bothersome and those who thought that their appearance was more favorable without spectacles were 3 times more likely not to wear spectacles postoperatively.Conclusion: ReSTOR® provides patients with good distance and near vision, a high rate of spectacles independence, and a high degree of patient satisfaction.Keywords: cataract surgery, multifocal intraocular lens, patient satisfaction, spectacles independence

  12. Ultrasound biomicroscopic analysis of iris-fixated foldable intraocular lens%应用超声生物显微镜分析虹膜固定折叠人工晶状体的位置

    Institute of Scientific and Technical Information of China (English)

    田庆芬; 刘景; 宋玮; 郝琳琳; 杜洋洋; 张晗

    2013-01-01

    目的 利用超声生物显微镜(UBM)观察虹膜固定后房型人工晶状体的位置,评价手术安全性.方法 临床病例对照研究.对2008年2月至2011年2月在山东大学第二医院眼科手术的无足够囊膜支撑的无晶状体眼患者17例17只眼,二期施行虹膜缝合固定后房型人工晶状体(PCIOL)手术,术后6个月行UBM检查,确定人工晶状体与睫状沟和睫状体的关系、前房深度(ACD)、人工晶状体倾斜情况、人工晶状体光学部与虹膜位置关系和房角情况.主要指标是襻的位置、前房深度和房角改变.结果 17个人工晶状体的34个襻中,27个(79.4%)襻位于睫状沟,5个(14.7%)襻位于睫状突,2个(5.9%)襻位于睫状体平坦部.17只眼中有11只眼(70.6%)双襻均位于睫状沟.前房深度为(3.39 ±0.47) mm.未发现虹膜周边前粘连、房角异常和晶状体光学部的倾斜.结论经UBM观察,虹膜缝合固定后房型人工晶状体的襻均位于睫状沟或睫状体,无明显的人工晶状体倾斜.这种术式不影响房角结构,无房角的关闭.前房深度与囊袋内植入人工晶状体最为接近.弄清人工晶状体位置可能有助于确定手术方式、人工晶状体度数计算和减少术后并发症.%Objective To observe the position of iris-fixated foldable lens with ultrasound biomicroscopic (UBM),and evaluate the safety of the operation.Methods Seventeen patients (17 eyes)who had insufficient posterior capsular support for intraocular lens underwent iris-fixated foldable lens implantation.Six months later,UBM was used to determinate the haptic position in relation to ciliary sulcus and ciliary body,the anterior chamber depth (ACD),lens tilt,relationship of the IOL optic to iris and angle abnormalities in these eyes.Main outcome measures were haptic position,ACD and iris anatomic changes.Results Of the 34 haptics,27 (79.4%) were positioned in the ciliary sulcus,5 (14.7%) haptics were found over the ciliary processes

  13. Clinical analysis of HIV positive patients cataract extraction and intraocular lens implantation%人类免疫缺陷病毒阳性者白内障手术临床观察

    Institute of Scientific and Technical Information of China (English)

    马建黎; 臧新莲; 闫珺

    2013-01-01

    目的 探讨人类免疫缺陷病毒(HIV)阳性患者白内障手术的疗效与安全性.方法 HIV阳性者16例(16眼)行白内障摘出人工晶状体植入术的疗效及安全性,进行回顾分析.结果 术后视力<0.1者2眼.0.1 ~0.5者9眼,>0.5者5眼.结论 HIV阳性患者行白内障摘出人工晶状体植入术安全、有效.%Objective To observe the results and safety of catarat surger in HIV positive patients.Methods In the surgery of cataract treatment from october.2007 to December.2011,the treating results and safety of 16 cases (16 eyes) of HIV positive patients cataract extraction and intraocular lens implantation were retrospectively studied.Results 2 cases (2 eyes) of whose vision were less than 0.1 after surgery.9 cases (9 eyes) of whose visual acuity were between 0.1 and 0.5.5 cases (5 eyes) of whose visual acuity were higher than 0.5.Conclusion HIV positive patients cataract extraction and intraocular lens implantation are safe and effective.

  14. 白内障手术中l期人工晶状体睫状沟缝线固定术的体会%Experience of intraocular lens implantation sutured in ciliary sulcus at l phase in cataract surgery

    Institute of Scientific and Technical Information of China (English)

    吕宏伟; 赵莉辉; 曾忠玲

    2016-01-01

    目的:探讨白内障复明术中l期人工晶状体睫状沟缝线固定手术的技巧,并发症和发生原因及处理方法。  方法:回顾36例37眼l期行人工晶状体睫状沟缝线固定术手术方法,并对手术效果及并发症予以分析。  结果:术后随访3~24lo,最佳矫正视力≥0.8者4眼(11%),0.4~0.8者19眼(51%),0.1~0.3者14眼(38%)。主要并发症为角膜轻水肿内皮混浊10眼(27%),玻璃体出血3眼(8%),所有患者无严重并发症。  结论:l期人工晶状体睫状沟缝线固定术是白内障常规手术方法的补充,安全、有效,可显著提高视力,减少并发症的发生。%AlM:To investigate the surgical skills, the causes and the treatment of the complications of intraocular lens implantation sutured in ciliary sulcus at l phase in cataract surgery. METHODS:Thirty-six cases ( 37 eyes ) that couldn’t implant intraocular lens normally were treated with intraocular lens sutured in ciliary sulcus. The surgical effect and complications were analyzed. RESULTS:Patients were followed up for 3-24mo. The postoperative best corrected visual acuity( BCVA) was ≥0. 8 in 4 eyes(11%), 0. 4-0. 8 in 19 eyes (51%), 0. 1-0. 3 in 14 eyes ( 38%) . There were 10 eyes ( 27%) with corneal endothelium edema, 3 eyes ( 8%) with vitreous hemorrhage, and all the symptoms disappeared after dealing. There were no serious complications and sequelae in all the patients CONCLUSlON:lntraocular lens implantation sutured in ciliary sulcus at l phase in cataract surgery is a complement of the conventional surgery method for cataract with safety and effectiveness. lt can increase the vision significantly and reduce the complications.

  15. Incidência de opacificação de cápsula posterior em pacientes submetidos à facoemulsificação e implante de lentes intra-oculares acrílicas hidrofílicas expansíveis Incidence of posterior capsule opacification in patients submitted to phacoemulsification and expandable acrylic intraocular lens implantation

    Directory of Open Access Journals (Sweden)

    Hilton Arcoverde Gonçalves de Medeiros

    2006-06-01

    Full Text Available OBJETIVO: Avaliar prospectivamente os resultados das lentes intra-oculares de polímeros expansíveis implantadas em pacientes submetidos à facoemulsificação, quanto à incidência de opacificação de cápsula posterior, levando em consideração a biocompatibilidade das lentes expansíveis. MÉTODOS: O grupo de estudo foi composto por 830 pacientes, 1.200 olhos, que foram submetidos a facoemulsificação, utilizando a mesma técnica, variando-se apenas o diâmetro da capsulorrexe, pelo mesmo cirurgião, no período de 1998 a 2002, com implante de lente intra-ocular hidrofílica expansível. O acompanhamento médio foi de 2,4 anos, variando de seis meses a quatro anos. RESULTADOS: O número total de opacificação de cápsula posterior foi de 54 casos. CONCLUSÃO: A incidência de opacificação de cápsula posterior encontrada no grupo foi de 4,6%.PURPOSE: To evaluate prospectively the results of expandable acrylic intraocular lenses in patients submitted to phacoemulsification as regard posterior capsule opacification. METHODS: The study group consisted of 830 patients, 1,200 eyes that underwent phacoemulsification from 1998 to 2002, by the same surgeon, using the same technique but with different diameters of capsulorrhexis, with expandable hydrophilic acrylic intraocular lens implantation. The mean follow-up was 2.4 years, ranging from 6 months to 4 years. RESULTS: The total number of posterior capsule opacification was 54 cases. CONCLUSIONS: The incidence of posterior capsule opacification was 4.6% in these patients.

  16. 白内障小瞳孔下超声乳化联合人工晶状体植入%The effect of phacoemulsification through a small pupil and intraocular lens implantation

    Institute of Scientific and Technical Information of China (English)

    郭哲锋; 原文新; 潘秀红

    2013-01-01

    Objective To observe the clinical effect of phacoemulsification through a small pupil and intraocular lens implantation.Methods Forty-two eyes of 38 patients accept phacoemulsification with intraocular lens implantation in treatment of small pupil cataract patients.Among them,14 eyes with posterior synechia after glaucoma surgery,6 eyes with small pupil caused by trauma,4 eyes without complications (All of the patients age≥71).After glaucoma surgery by using foldable IOL implantation with clear corneal incision,26 eyes implanted heparin surface modified intraocular lens with straight scleral tunnel incision,other 2 eyes implanted foldable lens.Postoperative follow-up 1-3months.Results The number of the preoperative uncorrected visual acuity (UCVA) or best-corrected visual acuity (BCVA) ≤ 0.3,Postoperativerly,the UCVA or BCVA ≥0.6 after the first week and first monthe were achieved in 31 eyes(73.8%)and 34 eyes(81.0%) >0.8 were achieved in 19 eyes(45.2%) after the first week.the pupil nearly circular or oval were achieved in 36 eyes,irregular pupil were achieved in 6 eyes.Part of the patient's pupil is larger in diameter than the preoperative.Conclusion The operation of phacoemulsification through a small pupil and intraocular lens implantation is complicated,prevention and treatment of the complications is very important.%目的 观察白内障在小瞳孔下超声乳化联合人工晶状体植入术的临床疗效.方法 采用超声乳化白内障摘出联合人工晶状体植入术治疗小瞳孔白内障38例(42眼).青光眼术后虹膜后粘连14眼,陈旧性虹膜炎虹膜后粘连18眼,外伤导致瞳孔不能散大6眼,无外伤或虹膜粘连瞳孔不能散大者4眼(均≥71岁).青光眼术后者采用透明角膜切口植入折叠人工晶状体,26眼采用巩膜隧道切口植入肝素表面处理的硬质人工晶状体,其余2眼也植入折叠人工晶状体.术后随访1~3个月.结果 术前裸眼视力或矫正视力均≤0.3,

  17. Preliminary clinical study after Tetraflex accommodating intraocular lens implantation%Tetraflex 可调节人工晶状体的临床应用

    Institute of Scientific and Technical Information of China (English)

    袁军; 杨潇远; 王骞; 陈鹏

    2010-01-01

    目的 评估眼内植入Tetraflex可调节人工晶状体增强远近视力的安全性、有效性.方法 取29例 (30只眼) 老年性白内障患者行超声乳化手术并植入 Tetraflex可调节人工晶状体;另外 26 例 (30只眼) 植入 IQ折叠人工晶状体.观察患者术后的裸眼远近视力、矫正远近视力、最佳矫正远视力下的近视力、调节幅度、手术中及术后并发症.结果 术后6个月,两组的裸眼远视力、矫正远、近视力差异无统计学意义(t =1.667、1.458、1.207,P >0.05),Tetraflex组的裸眼近视力和最佳矫正远视力下的近视力好于IQ组(t =2.407,8.667,P < 0.01) .视标推进法测得调节幅度 Tetraflex组 (2.79 ±0.33) D 大于IQ 组(1.42 ±0.25) D (t =15.218,P < 0.001) .结论 Tetraflex可调节人工晶状体是安全有效的,能够在改善患者远视力的同时增强近视力使白内障患者术后获得一定的调节力.%Objective To evaluate the safety and effectiveness of the Tetraflex accommodative intraocular lens (IOL) in providing both enhanced distance and near acuity. Methods Twenty-nine patients (30eyes) with age-related cataract underwent phacoemulsification and were implanted with Tetraflex IOL, while other 26 patients (30 eyes) were implanted with IQ. Prospective data collection included both uncorrected distance visual acuity (UCDVA) and uncorrected near visual acuity (UCNVA) testing, manifest refraction, best-corrected distance visual acuity (BCDVA), distance corrected near visual acuity (DCNVA), and the amplitude of accommodation. Intraoperative and postoperative complications also were reported. Results At 6 months after surgery, the uncorrected distant, corrected distant and corrected near visual acuity had no significant differences between two groups (t =1.667, 1.458, 1.207, P >0.05). The uncorrected near and distance corrected near visual acuity of Tetraflex group were better than IQ (t =2.407, 8.667, P <0.01). The retinoscopic accomodative

  18. Intraocular lens power calculations after refractive surgery%角膜屈光手术后人工晶状体度数的测算

    Institute of Scientific and Technical Information of China (English)

    陆勤康; 查桂平; 赖晓明; 童奇湖

    2015-01-01

    目的 评价Pentacam等效角膜屈光力(EKR)代入Holladay I公式联合双K法测算角膜屈光手术后人工晶状体(IOL)度数的准确性.方法 回顾性系列病例研究.收集既往有准分子激光角膜屈光术史白内障患者32例(45眼),所有患者在白内障术前接受Pentacam、IOLMaster检查,分别采用Pentacam EKR法、临床病史法、Haigis-L公式法计算IOL度数.白内障术后1个月进行客观验光,采用Kruskal-Wallis秩和检验和单因素方差分析比较术后屈光度的中值绝对偏差(MedAE)、平均绝对偏差(MAE).结果 Pentacam EKR代入Holladay I公式联合双K法得出MedAE为0.32 D,MAE为0.39 D,术后71%眼屈光误差在±0.50 D范围内,93%眼在±1.00 D范围内,而Haigis-L公式法得出MedAE为0.51 D,临床病史法MedAE为1.48 D.结论 Pentacam EKR代人Holladay I公式联合双K法测算角膜届光手术后IOL屈光度数比较准确.%Objective To investigate the refractive outcomes of intraocular lens (IOL) power calculations after refractive surgery with equivalent keratometry readings (EKR) and the double-K adjustment of the Holladay I formula.Methods In this retrospective study, 45 eyes of 32 patients undergoing phacoemulsification and IOL implantation after myopic laser in situ keratomileusis or photorefractive keratectomy were enrolled.Corneal power was obtained with a Pentacam and IOL Master.The IOL power was calculated by three methods: EKR, a clinical history and the Haigis-L formula.Final postoperative refraction was measured 1 month after the surgery.The median absolute error (MedAE) and the mean absolute error (MAE) of postoperative refraction were compared with those from the Haigis-L formula and the clinical history.The Kruskal-Wallis test was used to compare MedAE and one-way ANOVA was used for MAE.The accuracy of the EKR method was compared with other popular IOL calculation formulas for use in eyes after LASIK or PRK.Results EKR achieved the greatest predictive accuracy (P

  19. 人工晶状体植入术后迟发性葡萄膜炎临床分析%Clinical analysis of delayed uveitis after intraocular lens implantation

    Institute of Scientific and Technical Information of China (English)

    张秀艳

    2014-01-01

    Objective:To summarize the experience of delayed uveitis after intraocular lens implantation.Methods:90 patients with delayed uveitis after intraocular lens implantation were selected from August 2011 to September 2013.Clinical data were retrospectively analyzed.Results:All patients had different degrees of decreased visual acuity,patients feeled photophobia,tears, tingling,and so on.The onset time was 10 to 49 days,and most of the time was 17 to 25 days.After treatment for 3 to 5 days,the inflammation of 90 patients were controlled.After the treatment of 5 to 7 days,inflammation was subsided,and eyesight was restored.Conclusion:The multiple time of delayed uveitis after intraocular lens implantation is 17 to 25 days after operation.Strict aseptic operation in operation,timely application of glucocorticoid eyedrops are the key to the prevention.%目的:总结人工晶状体植入术后迟发性葡萄膜炎的经验。方法:2011年8月-2013年9月收治人工晶状体植入术后迟发性葡萄膜炎患者90例,进行回顾性分析。结果:所有患者均有不同程度视力下降,患者感觉畏光、流泪、刺痛等。发病时间是术后10~49 d,多数患者发生在术后17~25 d。90例患者经过治疗于3~5 d炎症得以控制,5~7 d炎症消退,视力恢复。结论:人工晶状体植入术后迟发性葡萄膜炎多发生于术后17~25 d,术中严格无菌操作,术后及时应用糖皮质激素滴眼液是预防的关键。

  20. Clinical observation of secondary intraocular lens with iris diaphragm implantation in the treatment of complicated ocular trauma%复杂眼外伤二期虹膜隔人工晶状体植入

    Institute of Scientific and Technical Information of China (English)

    刘身文; 秦波; 李柏军; 陈胜; 刘引

    2013-01-01

    目的 探讨复杂眼外伤二期虹膜隔人工晶状体植入的临床疗效.方法 对我院眼外伤科符合纳入标准的14例(14眼)的临床资料进行回顾分析.结果 所有患者一次手术成功(100%),随访3 ~18个月,视力提高12眼(85.71%),视力无明显变化的为2眼(14.29%),畏光明显改善的有12眼(85.71%),2眼(14.29%)术后无明显改善.结论 对于复杂眼外伤虹膜缺损明显或缺失的患者,二期虹膜隔人工晶状体植入术是一个有效的治疗方法,手术指征的选择及手术技巧的掌握至关重要.%Objective To investigate the clinical results of secondary intraocular lens with iris diaphragm implantation after complicated ocular trauma.Methods 14 eases(14 eyes) were retrospectively analyzed who were admitted to our hospital with diagnoses of complicated ocular trauma.Results The successful rate of the secondary intraocular lens with iris diaphragm implantation was 100%.Followed up for 3 ~38 months,visual acuities were improved in 12 eyes (85.71%) and no change in 2 eyes (14.29%).Photophobia was relieved obviously in 12 eyes(85.71%) and no change in 2 eyes (14.29%).Conclusion Secondary intraocular lens with iris diaphragm implantation is an effective treatment in the aniridia patients after complicated ocular trauma.The choice of surgical indications and techniques are essential.

  1. The effect of lens parameters on the development of the primary angle-closure glaucoma

    Institute of Scientific and Technical Information of China (English)

    Zhaohui Feng; Naixue Sun; Aiyi Zhou; Donggang Han; Yun Long; Zhao Wang; Xiaohua Wang

    2007-01-01

    Objective:To investigate the role the lens dimensions played on the pathogenesis of primary angle-closure glaucoma.Methods:38 eyes of 20 patients with primary angle-closure glaucoma (PACG) and 35 eyes of 22 normal individuals without ocular abnormalities were examined. The anatomical parameters of the lens and other structures of the anterior segment were calculated using B ultrasound, computer image processing and ultrasound biomicroscopy (UBM). The parameters were compared between the patients and normal subjects. Correlation analysis was used to determine the relationship between the radii of curvature of the anterior lens surface (RCALS) and the other parameters of the anterior segment. Results:Compared with the normal eyes, the eyes of PACG had thicker lens, steeper curvature of anterior lens surface, decreased depth of the anterior chamber, narrower chamber angle, and more anterior position of the ciliary bodies and lens. All these differences were significant(P < 0.05 or P < 0.01). In the PACG group, the RCALS had significantly negative correlation with the central and peripheral lens thickness (P < 0.01 and P < 0.05 respectively), and had positive correlation with relative lens position, anterior chamber depth (ACD), angle-open distance at 500 um(AOD500), trabecular iris angle(TIA) and trabecular ciliary processes distance(TCPD, P < 0.05 or P < 0.01 ). Conclusion:The occurrence of PACG is relevant to the abnormal anatomical structures of the anterior segment. Among all factors, the lens parameters play an important role in the pathogenesis. Increased lens thickness, relative more anterior position of lens, especially steepened curvature of anterior lens surface are predisposing factors of the pathologic phenomenon in PACG including pupillary blockage, shallow anterior chamber, secondary closure of chamber angle and elevation of intraocular pressure.

  2. Facoemulsificação e utilização de lentes intra-oculares em portadores de hanseníase: estudo caso-controle Phacoemulsification with intraocular lens implantation in leprosy patients: case control study

    OpenAIRE

    Rodrigo José Nunes Dias; Mônica Jeha Maakaroun; Aldemar Vilela de Castro

    2006-01-01

    OBJETIVO: Verificar as principais alterações e complicações relacionadas à cirurgia de catarata com o implante de lente intra-ocular em portadores de hanseníase, utilizando-se a técnica da facoemulsificação e, comparar estes resultados com um grupo de pacientes sem a doença. MÉTODOS: O método utilizado foi o estudo caso-controle, no qual foram incluídos 31 olhos de hansenianos operados no período de junho de 1999 a janeiro de 2003, denominados de Grupo Caso. Paralelamente foram selecionados o...

  3. 有晶状体眼前房型环曲面人工晶状体植入矫正散光%Artisan toric phakic intraocular lens for the correction of astigmatism

    Institute of Scientific and Technical Information of China (English)

    涂云海; 俞阿勇; 高潮

    2007-01-01

    散光的矫治一直是屈光手术的焦点,有晶状体眼前房型环曲面人工晶状体(Artisan toric phakic intraocular lens,TPIOL)矫正散光,以其矫治范围大、安全、有效,逐渐受到临床关注.本文就Artisan TPIOL的物理特征、手术患者的筛选、术前准备、手术方法,以及对其术后安全性、有效性、准确性、稳定性、最小损害等评价作一综述.

  4. 高度近视眼白内障摘除手术的研究进展%The progress of studies on intraocular lens implantation in cataract with high myopia

    Institute of Scientific and Technical Information of China (English)

    刘雪; 万修华

    2015-01-01

    随着白内障摘除手术技术的不断提高,高度近视眼的超声乳化白内障吸除IOL植入术已在临床广泛开展。高度近视眼的特殊性使白内障摘除手术的难度和风险增大,成为近年临床关注和研究的焦点。本文针对高度近视眼白内障摘除手术的术前检查、IOL的选择、手术方法、手术并发症等方面进行综述介绍。(中华眼科杂志,2015,51:548-551)%With development of the technology of cataract surgery, combined phacoemulsification and intraocular lens implantation in cataract with high myopia has been widely carried out in clinical treatment. Due to the particularity of high myopia, phacoemulsification in patients with cataract and high myopia is difficult and has recently received a lot of attentions. In this paper, preoperative examinations, the selection of intraocular lenses, surgery methods and surgical complications of cataract surgery in patients with cataract and high myopia are briefly reviewed.

  5. 超声乳化加人工晶体植入对葡萄膜炎并发白内障的治疗效果%The Effect of Phacoemulsification and Intraocular Lens Implantation for Uveitis Complicated Cataract

    Institute of Scientific and Technical Information of China (English)

    尹成建

    2015-01-01

    Objective To investigate the grape cataract with uveitis underwent phacoemulsification and intraocular lens implantation effect. Methods 84 patients with uveitis complicated cataract (84 eyes) were treated patients from January 2012 to June 2014 in our hospital, All patients underwent phacoemulsification and IOL implantation, to observe the curative effect. Results After 6 months the visual acuity better than that of pre operation, with significant difference (P<0.05), postoperative complications occurred in 15 patients (17.86%). Conclusion Phacoemulsification and intraocular lens implantation for cataract with uveitis grape effect, worthy of clinical application.%目的:探讨葡萄膜炎并发白内障行超声乳化加人工晶体植入术的效果。方法我院2012年1月~2014年6月间收治的葡萄膜炎并发白内障患者84例(84眼),所有患者均行超声乳化加人工晶状体植入,观察治疗效果。结果术后6个月患者视力较术前有明显改善,差异具有统计学意义(P<0.05);术中术后15例患者发生并发症(17.86%)。结论超声乳化加人工晶体植入治疗葡萄膜炎并发白内障效果较好,值得临床推广应用。

  6. 角膜屈光手术后人工晶状体度数计算的误差及矫正%Error sources and correction of intraocular lens power calculation after corneal refractive surgery

    Institute of Scientific and Technical Information of China (English)

    徐柏升; 顾扬顺

    2013-01-01

    As the increasing popularity of corneal refractive surgery and the aging of the society population,it presents a major challenge in accurate calculation of intraocular lens (IOL) power in cataract patients with prior refractive surgery.To cope with this situation,great efforts have been made to reveal the sources of calculation error and available corrective process.Essentially,the instrument error,the keratometer index error and the IOL formula error are considered to be the main three sources,whereas other biometric measurements (e.g.axial length) contribute slightly.Numerous established algorithms aim to reduce I0L prediction error mainly through postoperative corneal power correction or direct adjustment of calculated IOL power.However,it presents a confusing of the variety of procedures and formulas for the controversy of optimal choice still going on,so it is important to make comprehensive consideration of reliable historic material,physician's experience,and patient' s expectation when faced with this issues clinically.%如何准确计算角膜屈光手术后白内障患者的人工晶状体(intraocular lens,IOL)度数是常见的临床问题.常规的IOL计算误差主要来源于仪器检测误差、屈光指数误差和公式计算误差,解决方法主要是通过矫正屈光术后角膜屈光度,或直接矫正IOL计算值来减小预测误差.各种方法的临床应用准确性仍存在一些争议,临床医生应根据自己掌握的资料、临床经验和患者的期望选择合适的计算方法.

  7. Posterior Chamber Hemorrhage during Fluorescein Angiography

    Directory of Open Access Journals (Sweden)

    Manuel A. P. Vilela

    2015-01-01

    Full Text Available This paper provides the first reported case of acute posterior chamber hemorrhage during fluorescein angiography (FA. This is a case review with serial color photographs of the anterior segment. A 76-year-old male was referred for angiographic control of age-related macular degeneration. He was pseudophakic OU, BCVA 20/40 OU. He had mild hypertension, but not diabetes. He had had two previous angiograms without adverse effects. Difficulty was experienced in obtaining the images owing to a progressive reduction in the transparency of the media. A dense hemorrhage in the posterior chamber of the right eye was found, involving the visual axis. Thorough biomicroscopy, gonioscopy, and ultrasonic biomicroscopy showed that part of one of the haptics of the right intraocular lens (IOL was touching and tearing the posterior face of the iris, without any visible synechiae, iris, or angle neovascularization. Anterior segment FA and posterior ultrasonography were normal. No similar case has been described in the literature involving dense progressive bleeding located in the capsular bag and posterior chamber, without any detectable triggering ocular event other than mydriasis and fluorescein injection. Contact of the iris or sulcus with part of the intraocular lens, aggravated by the intense use of mydriatics during the FA procedure, probably caused bleeding to happen.

  8. Clinical research on secondary suspended intraocular lens implantation after ocular injury with Lensectomy-Vitrectomy%眼外伤晶状体玻璃体切除术后二期悬吊人工晶状体植入术分析

    Institute of Scientific and Technical Information of China (English)

    张玉明; 秦程; 王芳芳; 秦云峰; 孙建国

    2012-01-01

    Objective To evaluate the effect of secondary suspended intraocular lens implantation sulcus fixation after complicated ocular injury with lensectomy-vitrectomy. Methods Thirty-six eyes of ocular injury were subjected to lensectomy-vitrectomy,those were subjected to the secondary suspended intraocular lens implantation 3 to 6 months later.All cases were postoperative follow-up for 3 to 24 months. Results The 36 eyes were successfully implanted intraocular lens.The postoperative best-corrected vision of 36 eyes was reached or higher than the level of preoperative.The main complications were vitreous hemorrhage,ocular hypertension,intraocular lens deflection,residual silicone oil adhesion to intraocular lens particles,fixed suture exposure,erosion and so on. Conclusions The secondary suspended intraocular lens implantation sulcus fixation in eyes with no lens capsular support is a safe and reliable surgery for ocular injury after lensectomy-vitrectomy and this is a better treatment to correct refractive errors in Aphakic eyes.%目的 探讨复杂眼外伤晶状体玻璃体术后二期悬吊人工晶状体植入睫状沟固定术的方法及疗效.方法 对36只眼复杂眼外伤晶状体玻璃体切除术后3~6个月者行二期人工晶状体植入术.术后随访3~ 24个月.结果 36只眼均顺利植入人工晶状体.所有患眼均达到或超过术前最佳矫正视力.并发症主要有玻璃体积血、高眼压、人工晶状体偏斜、残留硅油颗粒粘附人工晶状体、固定缝线暴露、侵蚀等.结论 晶状体和玻璃体切除术后无晶状体囊膜眼二期悬吊人工晶状体植入睫状沟固定术安全可靠,是无晶状体眼屈光不正较好矫正方法.

  9. IMPLANTABLE COLLAMER LENS IMPLANTATION AND IRIS CERCLAGE FOR THE TREATMENT OF URRETS-ZAVALIA SYNDROME

    Directory of Open Access Journals (Sweden)

    Arnaldo D Santos

    2013-10-01

    Full Text Available A 27-year-old woman with bilateral high myopia had anterior chamber iris-claw phakic IOL implantation in her left eye (LE under local anesthesia, without intraoperative complications. The preoperative slitlamp examination was normal and she had no past medical history. On the second day post-operatory, she developed fixed dilated mydriasis and one month later we documented IOL subluxation. There had been no history of intra-ocular hypertension and no mydriatic drops were used. Diagnosis of U