Kandel Ram Prasad, Sapkota Yuddha Dhoj, Sherchan Anil, Sharma Manoj Kumar, Aghajanian Jaafar, Bassett Ken L
Seva Nepal, Kathmandu, Nepal.
Ophthalmic Epidemiol. 2010 Oct;17(5):276-81. doi: 10.3109/09286586.2010.508355.
To evaluate visual acuity outcome from cataract surgery based on a population-based survey among people aged 50 years and older in Lumbini Zone and Chitwan District of Nepal.
A randomly selected, population-based cross sectional epidemiological study of blindness, visual impairment and cataract surgical outcome was conducted. All subjects underwent a comprehensive ocular examination by an ophthalmic assistant, while people with visual impairment (visual acuity less than 6/18) after refraction and all cataract surgical cases underwent dilated fundus examination by an ophthalmologist.
5,916 people were enumerated and 5,141 (86.9%) examined. Among the 359 people who had cataract surgery, 485 eyes were included in the study. First eye surgery was before 2000 in 84 (23%), between 2000 and 2003 in 130 (36%), and after 2003 in 145 (41%). A presenting visual acuity ≥ 6/18 was achieved in 298 (61.4%) eyes (10 [17.8%] and 288 [67.1%] of aphakic and pseudophakic eyes, respectively) and best corrected vision ≥ 6/18 in 411 (84.7%) in all eyes. A presenting visual acuity less than 6/60 was found in 27 (6.3%) pseudophakic eyes. There was no significant difference in visual outcome based on age, sex, literacy, or institution. Uncorrected refractive error was the main cause (72.9%) of visual impairment in pseudophakic eyes.
Visual acuity outcome after cataract surgery requires further improvement to meet World Health Organization standards, particularly improvement in preoperative biometry and refractive services. The same quality cataract surgery was provided in and equitably distributed throughout Lumbini Zone and Chitwan District independent of age, sex, literacy or location.
基于尼泊尔蓝毗尼专区和奇特旺县50岁及以上人群的一项基于人群的调查，评估白内障手术的视力结果。
开展了一项随机选取的、基于人群的关于失明、视力损害和白内障手术结果的横断面流行病学研究。所有受试者均由眼科助理进行全面的眼部检查，而屈光不正后视力损害（视力低于6/18）的人群以及所有白内障手术病例均由眼科医生进行散瞳眼底检查。
共登记了5916人，5141人（86.9%）接受了检查。在接受白内障手术的359人中，485只眼纳入研究。首次眼部手术在2000年之前的有84例（23%），2000年至2003年之间的有130例（36%），2003年之后的有145例（41%）。298只眼（61.4%）达到了初始视力≥6/18（无晶状体眼和人工晶状体眼中分别为10只眼[17.8%]和288只眼[67.1%]），所有眼中411只眼（84.7%）的最佳矫正视力≥6/18。在27只（6.3%）人工晶状体眼中发现初始视力低于6/60。基于年龄、性别、识字率或机构，视力结果无显著差异。未矫正的屈光不正为人工晶状体眼视力损害的主要原因（72.9%）。
白内障手术后的视力结果需要进一步改善以达到世界卫生组织的标准，特别是术前生物测量和屈光服务方面的改善。在蓝毗尼专区和奇特旺县，无论年龄、性别、识字率或地点，均提供了同等质量的白内障手术且分布公平。
