Li Yanping, Huang Wenyong, Qiqige Aoyun, Zhang Hongwei, Jin Ling, Ti Pula, Yip Jennifer, Xiao Baixiang
The Affiliated Eye Hospital of Nanchang University, Nanchang City, China.
State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Centre, Sun Yat-sen University, #54 South Xianlie Road, Guangzhou City, Guangdong Province, 510060, China.
BMC Ophthalmol. 2018 Feb 13;18(1):41. doi: 10.1186/s12886-018-0705-6.
The aim of this cross-sectional study is to ascertain the prevalence and causes of blindness, visual impairment, uptake of cataract surgery among different ethnic groups in Xinjiang Uygur Autonomous Region, China.
Four thousand one hundred fifty people at 50 years and above from different minority ethnic groups were randomly selected for an eye examination. The four trained eye teams collected data using tumbling E visual chart, torch, portable slit lamp and direct ophthalmoscope in 2015. The World Health Organization's definition of blindness and visual impairment (VI) was used to classify patients in each ethnic group. Data were analyzed by different minority groups and were compared with Han Chinese.
3977 (95.8%) out of 4150 people were examined. The prevalence of blindness from the study population was 1.7% (95% confidence interval: 1.3-2.2%).There was no significant difference in prevalence of blindness between Han Chinese and people of Khazak and other minority ethnic groups, nor, between male and female. Cataract was the leading course (65.5%) of blindness and uncorrected refractive error was the most common cause of VI (36.3%) followed by myopic retinopathy. The most common barrier to cataract surgery was lack of awareness of service availability.
This study documented a low blindness prevalence among people aged 50 years and over comparing to prevalence identified through studies of other regions in China. It still indicates blindness and un-operated cataract as the significant public health issue, with no evidence of eye health inequalities, but some inequities in accessing to cataract surgery amongst ethnic minority groups in Xinjiang.
本横断面研究旨在确定中国新疆维吾尔自治区不同民族中失明、视力损害的患病率及病因，以及白内障手术的接受情况。
随机选取4150名50岁及以上的不同少数民族人群进行眼部检查。2015年，四个经过培训的眼科团队使用滚动E视力表、手电筒、便携式裂隙灯和直接检眼镜收集数据。采用世界卫生组织对失明和视力损害（VI）的定义对每个民族的患者进行分类。数据按不同少数民族群体进行分析，并与汉族进行比较。
4150人中3977人（95.8%）接受了检查。研究人群中失明的患病率为1.7%（95%置信区间：1.3 - 2.2%）。汉族与哈萨克族及其他少数民族人群之间的失明患病率无显著差异，男女之间也无显著差异。白内障是失明的主要原因（65.5%），未矫正屈光不正则是视力损害最常见的原因（36.3%），其次是近视性视网膜病变。白内障手术最常见的障碍是对可获得的服务缺乏认知。
与中国其他地区研究确定的患病率相比，本研究记录了50岁及以上人群中较低的失明患病率。这仍表明失明和未手术治疗的白内障是重大的公共卫生问题，没有眼部健康不平等的证据，但新疆少数民族群体在获得白内障手术方面存在一些不平等。
