Objective To investigate the prevalence and causes of blindness and low vision among older adults aged ≥50 years in Luxi county of Yunnan, China. Methods Cluster sampling was used in randomly selecting individuals aged ≥ 50 years in Luxi county. Eye examinations of external eye, anterior chamber, lens, fundus and so on were carried out by ophthalmologists. A diagnosis of the principal cause for all the eyes with best corrected visual acuity ≤0.5 was made as well. Results 5575 individuals were sampled. 5151 individuals received eye examinations, and the response rate was 92.4%. The prevalence of blindness and low vision increased with age, decreased with education, and was unrelated to sex. The survey showed that the most important cause leading to blindness and low vision was cataract. Conclusions The prevalence of blindness and low vision in the Luxi area is higher than that in northern, southern china and foreign country. Age is a risk factor of blindness and low vision.%目的 调查云南省泸西县人口中50岁及以上人群的盲与低视力患病率及病因.方法 采用整群随机抽样,对所有50岁及以上人群进行视力和眼部检查.结果 检录5 575人,受检人数为5 151人,受检率为92.4％.盲和低视力患病率随着年龄的增长而增加；随着文化程度的增高而降低,与性别无关.致盲和低视力的首要原因为白内障.结论 云南省泸西县人口中50岁及以上人群中盲与低视力患病率明显高于内地和国外；年龄是发生盲与低视力的危险因素.
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