The need for cataract surgery: projections based on lens opacity, visual acuity, and personal concern

AIM: To assess the projected needs for cataract surgery by lens opacity, visual acuity, and patient concern. METHODS: Data were collected as part of the Melbourne Visual Impairment Project, a population based study of age related eye disease in a representative sample of Melbourne residents aged 40 and over. Participants were recruited by a household census and invited to attend a local screening centre. At the study sites, the following data were collected: presenting and best corrected visual acuity, visual fields, intraocular pressure, satisfaction with current vision, personal health history and habits, and a standardised eye examination and photography of the lens and fundus. Lens photographs were graded twice and adjudicated to document lens opacities. Cataract was defined as nuclear greater than or equal to standard 2, 4/16 or greater cortical opacity, or any posterior subcapsular opacities. RESULTS: 3271 (83% response) people living in their own homes were examined. The participants ranged in age from 40 to 98 years and 1511 (46.2%) were men. Previous cataract surgery had been performed in 107 (3.4%) of the participants. The overall prevalence of any type of cataract that had not been surgically corrected was 18%. If the presence of cataract as defined was considered the sole criterion for cataract surgery with no reference to visual acuity, there would be 309 cataract operations per 1000 people aged 40 and over (96 eyes of people who were not satisfied with their vision, 210 eyes of people who were satisfied with their vision, and three previous cataract operations). At a visual acuity criterion of less than 6/12 (the vision required to legally drive a car), 48 cataract operations per 1000 would occur and people would be twice as likely to report dissatisfaction with their vision. CONCLUSIONS: Estimates of the need for cataract surgery vary dramatically by level of lens opacity, visual acuity, and patient concern. These data should be useful for the planning of health services.     

Extracapsular cataract extraction with intraocular lens implantation after scleral buckling surgery

We reviewed the records of 28 patients who had undergone successful scleral buckling surgery followed by extracapsular cataract extraction with implantation of an intraocular lens. Posterior chamber intraocular lenses were inserted in 27 eyes, and anterior chamber intraocular lenses were inserted in two eyes with posterior capsule rupture at the time of surgery. The mean follow-up period was 44 months. Final visual acuity was 20/40 or better in 15 of 29 eyes (52%). One eye (3.4%) developed a recurrent retinal detachment 15 months after cataract surgery. Two eyes (6.9%) developed angiographically proven cystoid macular edema. The outcome for extracapsular cataract extraction with intraocular lens implantation in eyes that had previously undergone successful scleral buckling for retinal detachment is favorable.     

Positioning of the posterior intraocular lens in the longer term following cataract surgery in eyes with and without pseudoexfoliation syndrome

Purpose: To assess long‐term positioning of posterior chamber intraocular lenses within the capsular bag in eyes with pseudoexfoliation syndrome. Methods: The study includes 44 patients with pseudoexfoliation syndrome and 85 age‐matched controls, who underwent cataract surgery in 2001 and 2002 at the Eye Department, Oslo University Hospital. In 2008, all patients were re‐examined. A comparison of the extent of possible decentration in eyes with and without pseudoexfoliation syndrome was made by evaluating Scheimpflug images (Pentacam) of the anterior segment. Results: It was found that, 6–7 years following cataract surgery, posterior chamber intraocular lenses were positioned lower in eyes with pseudoexfoliation syndrome than in control eyes. The difference was statistically significant (p = 0.01). Downward shift was associated with presence of glaucoma only in eyes with pseudoexfoliation syndrome (p = 0.01). No patients had visual disturbances related to displacement of the intraocular lens. Three of the patients with pseudoexfoliation syndrome (6.8%) had observable pseudophacodonesis by slit‐lamp examination, compared to one in the control group (1.2%). The study demonstrated that Pentacam is an appropriate instrument to measure decentration of intraocular lenses. Conclusion: The study suggests that, 6–7 years after cataract surgery, the intraocular lenses within the capsular bag are more prone to decentration in pseudoexfoliation syndrome eyes, compared to controls.     

Visual acuity and quality of life in patients with cataract in Doumen County, China.

PURPOSE: To evaluate the effectiveness of cataract surgery in achieving sight restoration and vision-related quality-of-life (QOL) in patients from rural southern China. DESIGN: Population-based, cross-sectional study. PARTICIPANTS: A total of 109 cataract operated persons (152 eyes) and 654 unoperated persons. METHODS: Cluster sampling was used in identifying a random sample of 5342 persons 50 years of age and older for visual acuity and eye examinations. Visual functioning (VF) and QOL questionnaires were administered to aphakic and pseudophakic individuals, unoperated persons with presenting visual acuity less than 0.10 in either eye, and a sample of those with normal vision. MAIN OUTCOME MEASURES: Distance visual acuity, VF, and QOL questionnaire scores. RESULTS: Among the cataract operated participants, 43 (39.4%) were bilaterally operated on, 32.1% had presenting visual acuity less than 0.10 in both eyes with 8.3% greater than or equal to 0.32 in both eyes. Of operated eyes, 52.6% presented with visual acuity less than 0.10, 23.7% greater than or equal to 0.32; with best correction, the corresponding percentages were 21.1% and 42.1%. Uncorrectable aphakia due to surgical complications was common. In a multivariate regression model, better visual acuity outcomes were associated with higher level surgeon practice settings and recent surgery. On a 0 to 100 scale, mean VF and QOL scores for the cataract operated population were 41.6 and 54.5, respectively. Mean scores ranged from 84.4 and 93.4, respectively, for the unoperated persons with normal vision, to 14.6 and 31.2, respectively, for those with visual acuity less than 0.05 in both eyes. The VF and QOL scores were closely correlated with presenting visual acuity in both cataract operated and unoperated populations (r = 0.49-0.64). Scores among the cataract operated population were not influenced by age, gender, or education level. Among the unoperated population, lack of education was associated with lower VF and QOL scores (P = 0.017 and P = 0.005, respectively), and older age was associated with lower QOL scores (P < 0.001). CONCLUSION: Patients in rural southern China are not realizing the full sight-restoring potential of modern-day cataract surgery. Remedial efforts are needed to improve the performance of local eye surgeons.     

A population-based eye survey of older adults in a rural district of Rajasthan: II. Outcomes of cataract surgery

PURPOSE: To assess the outcomes of cataract surgery in rural northwest India. DESIGN: Population-based, cross-sectional study. PARTICIPANTS: A total of 549 cataract-operated persons (723 operated eyes). METHODS: Cluster sampling was used in randomly selecting a cross-sectional sample of persons 50 years of age or older for visual acuity measurement, refraction, and slit-lamp and direct ophthalmoscope examination early in 1999. Those operated on for cataract were queried as to the date and place of surgery. The principal cause of reduced vision was identified for all examined eyes with presenting visual acuity worse than 6/18. MAIN OUTCOME MEASURES: Presenting and best-corrected visual acuity and cause of vision loss. RESULTS: Presenting visual acuity was less than 6/60 in the better eye in 33.7% of cataract-operated persons and greater than or equal to 6/18 in both eyes in 8.2%; 31.7% were bilaterally operated on. Of cataract-operated eyes, 44.1% initially had visual acuity less than 6/60 and 31.5% greater than or equal to 6/18; with best correction, the corresponding percentages were 14.0% and 61.5%. Intracapsular cataract extraction was used in 92% of cases, and 66% had been operated on in surgery camps. Surgical complications were common and a major cause of vision impairment. In multiple logistic regression modeling, female gender and residence in a rural area were associated negatively with both presenting and best-corrected visual acuity outcomes, and surgery conducted before 1990 was associated negatively with best-corrected visual acuity. Place of surgery and subject schooling were not associated with vision outcomes. CONCLUSIONS: Cataract surgery subjects in rural areas of India that are without adequately equipped facilities and skilled surgeons, and lack of availability of intraocular lenses, are not realizing the full sight-restoring potential of modern-day surgery. Emphasis on the quality of cataract surgery outcomes must be increased to keep pace with that being given to increasing surgical volume.     

Results of penetrating keratoplasty with posterior chamber intraocular lens implantation in the absence of a lens capsule.

We studied 21 consecutive cases of posterior chamber intraocular lens implantation in the absence of an intact lens capsule performed during penetrating keratoplasty. Twenty patients had iris sutures to support the posterior chamber intraocular lenses (one required no suture). Twelve patients had closed-loop anterior chamber intraocular lenses, and five patients had other types of intraocular lenses explanted at the time of surgery. Postoperative follow-up time averaged 10 months, ranging from 2 to 19 months, with ten eyes having at least 1 year follow-up. All 21 grafts remained clear at their latest examinations. Seven eyes (33%) had 20/50 or better visual acuity, nine (43%) had a visual acuity from 20/60 to 20/150, and five (24%) had a visual acuity of 20/200 or worse at their latest examinations. All patients had improved vision postoperatively, and nine eyes (43%) achieved an improvement in vision of five lines or better. Of the ten eyes with at least 1 year follow-up, all had their sutures removed and four (40%) had 20/40 or better visual acuity. Of the remaining six patients (60%) with visual acuity worse than 20/40, all had significant retinal disease and/or glaucoma.     

LENTIS Comfort Toric人工晶状体植入术后视觉质量分析

目的:探讨白内障手术中植入LENTIS Comfort Toric人工晶状体后的视觉质量。方法:回顾性对照临床研究,收集数字化导航辅助下白内障超声乳化摘除联合人工晶状体植入术患者40例40眼,植入LENTIS Comfort Toric(MF15T)人工晶状体为A组(24眼),植入单焦点Toric人工晶状体为B组(16眼);观察术后3mo不同距离视力、术后散光质心值、脱镜率、离焦曲线变化以及人工晶状体稳定性等。结果:两组患者术后均无严重并发症出现,两组术后3mo远视力无差异(P>0.05);A组中视力、近视力明显优于B组(P<0.01);A组术后脱镜率为99%,B组为45%(P<0.05);两组术后3mo散光质心值均较术前改善,但组间无差异(P>0.05);术后3mo A组离焦曲线于+0.50、-1.75D分别出现峰值,形成平台并平缓下降,B组于+0.25、-0.25D出现峰值后呈陡峭趋势下降。术后1d A组出现1眼(4%)人工晶状体轴位旋转大于10°;B组出现6眼(38%)人工晶状体轴位旋转大于10°,2眼(33%)顺时针旋转,4眼(67%)逆时针旋转;两组均...     

Longterm results after phacovitrectomy and foldable intraocular lens implantation

Purpose: This study aimed to evaluate the longterm results of phacovitrectomy and foldable intraocular lens (IOL) implantation in eyes with significant cataract and co‐existing vitreoretinal diseases. Methods: We carried out a retrospective study of 186 eyes of 149 patients with various vitreoretinal abnormalities and visually significant cataracts. Vitreoretinal surgery was combined with phacoemulsification and foldable IOL implantation. Main outcome measures were visual acuity (VA), preoperative data, and intraoperative and postoperative complications. Results: The most common indications for surgery were non‐diabetic vitreous haemorrhage and proliferative diabetic retinopathy. Preoperative vision ranged from 0.6 to light perception; postoperative vision ranged from 1.2 to no light perception. Postoperatively, in 162 eyes (87.1%) VA improved by ≥ 3 lines on the decimal chart. In 14 eyes (7.5%), vision remained within 3 lines of preoperative levels and in 10 eyes (5.3%), vision had decreased by the last follow‐up. Postoperative complications included elevated intraocular pressure and posterior capsule opacification, corneal edema, macular edema, fibrinous reaction, vitreous hemorrhage, corneal epithelial defects, anterior chamber hyphema, choroidal detachment, persistent macular hole, posterior synechiae, recurrent retinal detachment, rubeosis iridis, neovascular glaucoma. Conclusions: Combined vitreoretinal surgery and phacoemulsification with foldable IOL implantation is safe and effective in treating vitreoretinal abnormalities co‐existing with cataract. Based on extensive experience with the combined procedure, we suggest that combined surgery is recommended in selected patients with simultaneous vitreoretinal pathological changes and cataract.     

Visual acuity and quality of life outcomes in cataract surgery patients in Hong Kong.

BACKGROUND: Visual acuity, visual functioning, and vision related quality of life outcomes after cataract surgery were assessed in a population based study in a suburban area of Hong Kong. METHODS: A cluster sampling design was used to select apartment buildings within housing estates for enumeration. All enumerated residents 60 years of age or over were invited for an eye examination and visual acuity measurement at a site within each estate. Visual functioning (VF) and vision related quality of life (QOL) questionnaires were administered to interview subjects who had undergone cataract surgery and to unoperated people with presenting visual acuity less than 6/60 in either eye, and a sample of those with normal visual acuity. RESULTS: 36.6% of the 310 cataract operated individuals had presenting visual acuity 6/18 or better in both eyes, and 40.0% when measured by pinhole. 4.5% were blind, with presenting visual acuity less than 6/60 in both eyes. Of operated eyes, 59.6% presented with visual acuity 6/18 or better. 11.2% of the operated eyes were blind with vision less than 6/60. Visual acuity outcomes 6/18 or better were marginally associated with surgery in private versus public hospitals. Lens status (pseudophakic versus aphakic) and surgical period (within the most recent 3 years versus before) were not significantly related to vision outcomes. Mean VF and QOL scores decreased consistently with decreasing vision status. Spearman correlation with vision status was 0.420 for VF scores and 0.313 for QOL scores. Among VF/QOL subscales, correlation was strongest for visual perception (r = 0.447) among VF subscales and weakest for self care (r = 0.171) among QOL subscales. Regression adjusted VF and QOL total scores for cataract operated individuals were slightly lower than for those of visually comparable unoperated individuals (p<0.05). CONCLUSIONS: Cataract operations in Hong Kong did not consistently produce good presenting visual acuity outcomes, suggesting that postoperative monitoring would be useful to minimise visual impairment in this population. Although vision outcomes were consistently correlated with all VF/QOL subscale scores, there was a differential impact with VF subscales usually being affected more by reduced acuity than the more general QOL subscales.     

新型前房型人工晶状体一期二期植入临床观察

目的：评价新型弹性开放襻前房型人工晶状体一期或二期植入的临床效果。方法：共34只眼,一期前房型人工晶状体植入19只眼,其中老年性白内障12只眼,外伤性昌状体半脱位4只眼,外伤性白内障3只眼;二期植入15只眼,其中老年性白内障术后8只眼,外伤性白内障术后7只眼。术后随访半年以上。结果：一期植入术后68.4%(13只）眼视力≥0.5,其中≥1.0有3只眼,占15.8%,二期植术术后73.3%(11只眼）视力≥0.5,其中≥1.0有4只眼,占26.7%;术后常见并发症为角膜水肿的眼压升高。结论：新型弹性开放襻前房型人工晶状体一期二期植入均安全、有效。     

Visual acuity and binocular vision in children with pseudophakia

PURPOSE: To evaluate the results of cataract surgery in children with IOL implantation. MATERIALS AND METHODS: Our research involved 106 children (156 eyes) with congenital and traumatic cataract, in age from 18 months to 18 years, who underwent cataract surgery with intraocular lens implantation. We evaluated visual acuity for far vision and binocular vision after surgery. RESULTS: Visual acuity over 0.5 in unilateral congenital cataract was found in 27.25%, in traumatic cataract in 73%, whereas in bilateral congenital cataract visual acuity over 0.5 we received in 75% of operated children. Full binocular vision was obtained in children with good visual acuity (0.5 and more), with appropriate alignment of the eyes: 13.1% in unilateral congenital cataract, 45.4% in traumatic cataract and 55% in congenital bilateral cataract. CONCLUSIONS: Cataract surgery with intraocular lens implantation results in increase of visual acuity and in achievement binocular vision, if surgery is carried out in the early period, after it had been diagnosed.     

Visual outcomes after vitreous loss during cataract surgery performed by residents

PURPOSE: To evaluate the visual outcomes after vitreous loss during cataract surgery performed by residents. SETTING: Parkland Memorial Hospital, Dallas, Texas, USA. METHODS: A retrospective chart review of all patients who had cataract extraction complicated by vitreous loss from 1997 through 1999 was conducted. All surgery was performed by third-year ophthalmology residents. RESULTS: In 1400 cataract surgeries, 63 cases of vitreous loss (rate 4.5%) were identified. One case had less than 1 month of follow-up and was excluded from further analysis. Of the 62 remaining cases, 53 had phacoemulsification, 7 extracapsular cataract extraction (ECCE), 1 phacoemulsification converted to ECCE, and 1 intracapsular cataract extraction. Thirty-two eyes had a sulcus-fixated posterior chamber intraocular lens (PC IOL) implanted, 20 an anterior chamber IOL, and 7 a PC IOL in the capsular bag; 3 eyes were left aphakic at the time of initial surgery. Overall, 77% of patients had a postoperative best corrected visual acuity (BCVA) of 20/40 or better. Of the 14 patients who did not have a BCVA of 20/40 or better, 9 had preexisting ocular pathology affecting vision. If these 9 patients are excluded, 91% of patients with vitreous loss had a BCVA of 20/40 or better. Six patients (10%) developed clinical cystoid macular edema. No patient with vitreous loss developed a retinal detachment or endophthalmitis. CONCLUSIONS: Good visual acuity can be achieved after resident cataract surgery complicated by vitreous loss. The rate of vitreous loss in this study is consistent with that in previous reports of resident cataract surgery in the literature.     

Cataract surgical coverage and outcome of cataract surgery in a rural district in Malawi

BACKGROUND: Cataract is the leading cause of blindness in Malawi. We sought to determine the cataract surgical coverage and the outcome of cataract surgery in a rural district in Malawi to assess past performance of cataract surgical services. METHODS: From July to October 1999 we conducted a multistage random cluster survey to include 1630 residents aged 50 years or more in Chikwawa District. Visual acuity, cause of vision loss, history of cataract surgery and cause of poor vision (if less than 6/60) were assessed. Cataract surgical coverage, sight restoration rate and outcome were calculated by person and eye and for men and women separately. RESULTS: We examined 1384 people (84.9% of target). Twenty-one people (12 men and 9 women) (30 eyes) had received cataract surgery. The cataract surgical coverage rate was 35.6% (44.4% for men and 28.1% for women [odds ratio 2.0, 95% confidence interval 0.6-7.0]) at a visual acuity level of 6/60, and 55.3% (60.0% for men and 50.0% for women [odds ratio 1.5, 95% confidence interval 0.3-6.7]) at a level of 3/60. Only one eye of one subject had received an intraocular lens. Presenting visual acuity was 6/18 or better in 7 eyes (23.3%), 6/24 to 6/60 in 7 eyes, and worse than 6/60 in 16 eyes (53.3%). Among the 16 eyes with visual acuity less than 6/60, the vision could be improved in 8 with provision of aphakic spectacles. INTERPRETATION: Cataract surgical coverage in this population is similar to that reported from other countries in Africa. As in other settings, cataract surgical coverage was lower in women than in men. Poor outcomes in this population are partly due to surgical complications and partly due to a lack of aphakic correction. Surgical promotion programs will need to focus on differentiating intraocular lens surgery from (previously practised) intracapsular cataract extraction surgery.     

外伤性白内障后囊缺损后房型人工晶体缝线固定术

目的：观察36例（36眼）外伤性白内障后囊缺损行后房型人工晶状体缝线固定术的效果。方法：10眼为异物伤行异物摘出联合一期植入术。7眼为术中后囊缺损大而改行缝线固定术。19眼为二期缝线固定术。结果：所有患者术后均获得有用视力，其中达0．5以上25眼（69．4％）。结论：人工晶状体缝线固定植入术治疗外伤性白内障效果满意，不同程度恢复有用视力及双眼单视功能。     

Implantation of scleral‐fixated posterior chamber intraocular lenses in adults

Purpose: To report the results of transscleral fixation of posterior chamber intraocular lenses in adults. Methods: We carried out a retrospective analysis of 91 eyes of 81 patients who underwent implantation of posterior chamber lenses with transscleral sutures between 1997 and 2006. The mean age of the patients was 62 years (range 19–94 years). Sixty‐eight eyes (74.7%) were aphakic at the time of surgery. In 10 patients (11.0%) an intracapsular cataract extraction and in six patients (6.6%) a pars plana lensectomy was performed prior to the fixation of the posterior chamber intraocular lens. In seven eyes (7.7%) a previously implanted IOL was removed. The mean follow‐up was 36 months (range 6–116 months). Results: The mean preoperative best corrected visual acuity (BCVA) was 0.37 (range counting fingers to 1.0), which improved to 0.5 (range light perception to 1.0) postoperatively. At the end of follow‐up, BCVA was unchanged or improved in 81 eyes (89.0%), reduced by 2 Snellen lines in four eyes (4.4%), and between finger counting and light perception in four eyes (4.4%). The most serious complication was suprachoroidal haemorrhage, which occurred in two eyes. Retinal detachment occurred in three eyes, all of which successfully reattached after surgery. Suture erosion or spontaneous dislocation caused by suture degradation or breakage was not seen. Conclusions: Secondary implantation of posterior chamber intraocular lenses with transscleral fixation is a reasonably safe procedure in adults, with relatively few serious complications. Even in patients with longterm follow‐up, suture breakage was not seen.     

安徽省贫困白内障患者复明术后视力效果评估

目的了解安徽省2013-2014年度贫困白内障患者复明术后中远期恢复情况。方法横断面调查研究。采用整体随机抽样方法抽取8个受检点（舒城县、庐江县、潜山县、池州市贵池区、郎溪县、太和县、毫州市谯城区、灵璧县）调查1 140例（1 557眼）白内障术后患者,所有受检人员均接受详细眼科检查,包括视力、裂隙灯显微镜、直接检眼镜、眼压和验光等。结果共718例（985眼）完成检查,受检率为83.0%。术后最佳矫正视力（BCVA）≥0.05者940眼（95.4%）,≥0.3者826眼（83.8%）,≥0.5者670眼（68.0%）。979眼（99.4%）植入人工晶状体（IOL）;963眼（97.8%）角膜透明,904眼（91.8%）瞳孔正圆无移位,953眼（96.8%）IOL居中正位,623眼（63.2%）后囊透明,眼压为（14.3±4.9）mmHg。284眼（28.8%）伴屈光不正。主诉最多者为流泪[313眼（31.8%）]。BCVA低于0.05的眼中,原因依次为年龄相关性黄斑变性、高度近视性视网膜病变、后发性白内障、角膜斑翳和视神经萎缩等;在BCVA低于0.3的眼中,主要原因依次为年龄相关性黄斑变性、后发性白内障、高度近视性视网膜病变、角膜斑翳和糖尿病视网膜病变等。结论安徽省80%以上的免费白内障手术患者达到康复视力,约30%的患者伴有屈光不正和后发性白内障,术后低视力和盲的患者主要由术前原有的眼底病变导致。     

高度近视眼白内障术后并发视网膜脱离的临床分析

目的：分析高度近视眼行白内障摘除及后房型人工晶状体植入术后并发裂孔源性视网膜脱离的发生率、相关危险因素及临床特点。方法：回顾性分析高度近视眼行白内障摘除及后房型人工晶状体植入术患者146例（232只眼）。裂孔源性视网膜脱离在术后随访的3年时间发生。所有眼均进行了详细的眼科检查，包括：最佳矫正视力、眼底检查、A超眼轴长度测量。结果：15只眼发生裂孔源性视网膜脱离（6．4％），均需行玻璃体视网膜手术进行视网膜复位。从白内障手术到发生视网膜脱离的平均时间为10±9个月（0．5～32个月）。视网膜脱离经手术治疗后视力为手动／10cm～0．06，12只眼（80％）最终视力低于白内障术前。术中后囊膜破裂与术后视网膜脱离的发生显著相关（P〈0．01），60％（9／15）的视网膜脱离患者术中发生了后囊膜破裂。结论：高度近视眼白内障术后并发裂孔源性视网膜脱离的发生率为6．4％，其预后差。术中发生后囊膜破裂患者术后发生视网膜脱离的危险性更高，对术中后囊膜破裂患者需密切随访。     

Rate of cataract formation in 343 highly myopic eyes after implantation of three types of phakic intraocular lenses

PURPOSE: To assess the feasibility of using phakic intraocular lenses (PIOL) to treat high myopia, and evaluate the incidence of cataract, comparing three different lens types. METHODS: From 1989 to 2002, we implanted three different phakic intraocular lenses (PIOL) in 343 eyes of 232 patients; 231 eyes recieved an Ophtec (Worst-Fechner model, iris-claw), 89 an Adatomed (silicone posterior chamber), and 23 a Staar (posterior chamber, models V2, V3, V4). Average follow-up was 96.2 months for the Ophtec group, 31.5 months for the Adatomed group, and 19.3 months for Staar group. Eyes that subsequently developed cataract were studied for clinical evolution and had PIOL explantation and cataract extraction. RESULTS: Nuclear cataract developed in 7 of 231 eyes (3.04 %) with an Ophtec lens. Anterior subcapsular cataract developed with the two types of posterior PIOLs (Adatomed group: 38/89 eyes, 42.69%; Staar group: 3/23 eyes, 13.04%). Anterior subcapsular cataract in the Adatomed group developed more rapidly compared to the Staar group. We explanted 7 lenses in the Ophtec group, 16 lenses in the Adatomed group, and 2 lenses in the Staar group (models V2 and V3 only). Patient age older than 40 years at implantation of PIOLs and axial length greater than 30 mm were factors significantly related to nuclear cataract formation and the Ophtec lens. However, these two factors had a weaker correlation with the posterior phakic lenses (Adatomed, Staar) for high myopia than with the Ophtec lens. Postoperative best spectacle-corrected visual acuity remained stable after explantation, phacoemulsification, and posterior chamber lens implantation. CONCLUSIONS: Delayed cataract development and cataract type (nuclear) in patients with an Ophtec lens and the variables of patient age (>40 yr) and axial length (>30 mm) may considered prognostic factors. Other factors such as lens design, material, and placement probably influenced cataract formation in patients with the Adatomed and Staar PIOLs. The lens styles used in this study are no longer manufactured.     

Cataract surgery in children with chronic uveitis

OBJECTIVE: To evaluate the visual outcome of cataract surgery in children's eyes with chronic uveitis and the feasibility of intraocular lens (IOL) implantation in these cases. DESIGN: Retrospective noncomparative case series. PARTICIPANTS: Seventeen children (20 eyes) with chronic uveitis, dense cataract, and a preoperative visual acuity of 6/120 or less with follow-up of 5 years after the initial cataract surgery. METHODS: In 10 eyes of 10 children (five with juvenile rheumatoid arthritis [JRA] and five with non-JRA-associated uveitis) with uniocular or markedly unequal binocular disease, surgery was carried out through the limbus and a posterior chamber IOL was implanted. In seven children (10 eyes), three with JRA and four with non-JRA-associated disease, a pars plana approach was used, and contact lenses or glasses (for the bilateral cases) were prescribed. RESULTS: The postoperative course and immediate restored visual acuities were similar whether an IOL was implanted or not. One month after the surgery, visual acuity improved in all operated eyes. After monocular surgery, in the younger children, contact lenses were poorly tolerated and their use discontinued. These aphakic eyes remained with low vision, developing strabismus on longer follow-up. Children with JRA-associated uveitis were younger, demonstrated an active intraocular inflammation for an extended period after surgery, and tended to have secondary membranes develop, necessitating a second surgical intervention. Five years after the initial surgery, only two of nine eyes (22%) in the JRA group (one aphakic of a bilaterally affected child and one pseudophakic in a child undergoing cataract surgery in one eye) retained a visual acuity of 6/9 and 6/6, respectively. In the other seven eyes, the visual acuity was 6/60 in one pseudophakic eye and 6/240 or less in six eyes (three aphakic and three pseudophakic). In children with non-JRA-associated uveitis, 6 (four aphakic in two patients bilaterally affected and two pseudophakic) of 11 eyes (54.5%) retained a vision of 6/12 or better. CONCLUSIONS: Cataract surgery in children's eyes with uveitis may be beneficial. IOL implantation seems preferable to correction with contact lenses in young children needing surgery in one eye. In children with JRA-associated uveitis, the final visual results remain guarded because of irreversible amblyopia and a more complicated postoperative course. For these cases, a modified management approach and a better surgical technique are needed.     

小切口非超声乳化白内障摘出术中后囊破裂人工晶状体一期植入临床观察

【摘目的探讨小切口非超声乳化白内障摘出术中发生后囊破裂人工晶状体一期植入的安全性和有效性。方法对346例（381眼）行小切口非超声乳化白内障摘出术,术中发生晶状体后囊破裂2l眼,其中18眼一期植入后房人工晶状体,3眼未植入人工晶状体,观察后囊破裂人工晶状体一期植人病例的并发症及术后3月视力。结果一过性眼压升高3眼（16．67％）,角膜水肿16眼（88．89％）,人工晶状体轻度偏位2眼（11．11％）,瞳孔欠圆、轻度移位5眼（27．78％）,术后3月最佳矫正视力≥O．5者13眼（72．22％）,无严重并发症发生。结论小切口非超声乳化白内障摘出术中后囊破裂时,视具体情况后房型人工晶状体一期植入是安全的,并可取得较好的视力。