方法：采用整群抽样方法，对青海省玛沁县的世居藏族人群进行视力及视网膜血管性疾病抽样调查。

结果：受检人数为2 511例，视网膜血管性疾病29例37眼，患病率为1.15%，其中视网膜静脉阻塞21例23眼(0.84%)，糖尿病视网膜病变5例10眼(0.20%)、视网膜血管炎3例4眼(0.12%)。视网膜血管性疾病的盲及低视力为23眼(0.92%)。

结论：高原地区高血压、高血糖、红细胞增多症、高海拔和体质量是视网膜血管性疾病的高危因素； 视网膜血管性疾病是致盲的主要眼底病。

METHODS:The cluster sampling method was used to investigate the visual acuity and retinal vessel diseases of the native Tibetan among the aged 40 and above in Maqin county.

RESULTS:Totally 2 511 individuals were underwent the survey, among them, 29 cases(37 eyes)were of retinal vessel diseases, the prevalence was 1.15%, 21 cases(23 eyes)were retinal vein obstruction(0.84%), 5 cases(10 eyes)were diabetic retinopathy(0.20%), 3 cases(4 eyes)were retinal vasculitis(0.12%). The blindness and low vision of retinal vessels disease were 23 eyes(0.92%).

CONCLUSION:All the hypertension, hyperglycemia, erythrocytosis, high altitude and weight are the high risk factors of retinal vessel diseases which are the main eyes fundus disease could grow blind.