青海省玛沁县40岁及以上世居藏民盲与低视力的患病率调查

目的调查青海省玛沁县40岁及以上世居藏族人群中盲与低视力的患病率及致病原因。方法2004年3～5月采用整群抽样方法，对玛沁县的世居藏族人群进行视力及眼病抽样调查，共抽取26个大队(村)的2760人，根据世界卫生组织视力损伤标准(标准A)及日常生活视力和视力损伤标准(标准B)计算盲与低视力的患病率。结果在应受检的2760人中，实际受检人数为2511人，受检率为90．98％．(1)以标准A计算，双眼盲的患病率为4．1％，双眼低视力的患病率为5．3％；(2)按标准B计算双眼盲的患病率为5．4％．结论玛沁县世居藏民盲的患病率明显高于内地，高于林周县的2．3％(标准A)和3．2％(标准B)。白内障是盲与低视力的最主要原因。

Prevalence of blindness and low vision among the aged 40 and above of Tibetan in Maqin County,Qinghai Province

Objective To Investigate the prevalence of blindness and low vision among the aged 40 or above Tibetan in Maqin County, Qinghai Province. Methods Cluster sampling was adopted in randomly selected individuals aged 40 years and above in 26 villages in Maqin County. A total of 2 760 individuals were examined for visual acuity and eye condition. The prevalence of blindness was calculated according to the WHO blindness criterion (criterion A) and presenting vision with blindness criterion (criterion B). Results Visual acuities of 2 511 individuals among the total of 2 760 cases were checked (90. 98%). In this population, the prevalence of blindness was 4. 1 % according to pinhole visual acuity<0. 05 in both eyes; 5.4% according to presenting visual acuity < 0.1(6/60) in both eyes. Conclusion The prevalence of blindness in Maqin County was much higher than that in inland and Linzhou County whose prevalence of blindness was 2.3% (criterion A) and 3.2% (criterion B), respectively. The principal cause of blindness in eyes was cataract.