目的:了解四川省低视力及盲的原因和发病率。方法:分层多阶段及随机抽样调查38个县市40351户125641人,进行全面眼部检查,包括标准对数视力表检测视力,发病率以年龄和性别为标准根据2000年中国人口普查结果进行分析。结果:盲率0.77%(95%可信区间:0.72～0.82,n=966),低视力率1.22%(95%可信区间1.14～1.27,n=1513)。视力残疾率城市1.40%,农村2.22%(P<0.01),白内障无论城市还是农村均是首位致残原因(55.7%,n=1381),视网膜疾病居第二(9.7%,n=236),但是城市明显高于农村(34.3%vs2.7%,P<0.01)。角膜病居第三(6.5%,n=161),农村明显多于城市(7.2%vs3.9%,P=0.006)。结论:四川省估计有约172万视力残疾患者,其中52.5万盲人,防盲重心在农村。

AIM:To describe the prevalence and causes of low vision and blindness in a population within Sichuan province in southwestern China.METHODS:A stratified,multi-phased and cluster probability sampling design was employed to enumerate 125641 participants from 40351 households within 38 counties/cities. Participants underwent a comprehensive eye examination,including standardized visual acuity (VA) tests using logarithm of the minimum angle resolution charts. Prevalence was age-and gender-standardized to the 2000 China Census.RESULTS:Population-weighted prevalence of blindness was 0.77% (95% CI:0.72-0.82,n=966) and low vision was 1.22% (95% CI:1.14-1.27,n=1513). Overall,the prevalence of visual disability was 1.40% in the urban population,and 2.22% in the rural population (P<0.01). Cataract was the leading cause of visual disability (55.7%,n=1381),and was of similar frequency in both urban and rural populations. Retinal disease was the second leading cause (9.7%,n=236),but was more common in urban than rural participants (34.3% vs 2.7%,P<0.01). Corneal disease accounted for 6.5% (n=161) of cases of visual disability,and was more common in the rural population (7.2% vs 3.9%,P=0.006). CONCLUSION:We estimate that 1.72 million people suffer from visual disability within Sichuan province,of which 525000 are blind,the focus of blindness prevention should be in rural area.

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