Causes of blindness in the study.

ARMD, age-related macular disease; BVO, branch vein occlusion; CVO, central vein occlusion; PACG, primary angle-closure glaucoma; POAG, primary open-angle glaucoma. Causes of blindness in the study.年龄相关性黄斑变性（age-related macular disease, ARMD）、分支静脉阻塞（branch vein occlusion, BVO）、中央静脉阻塞（central vein occlusion, CVO）、原发性闭角型青光眼（primary angle-closure glaucoma, PACG）以及原发性开角型青光眼（primary open-angle glaucoma, POAG）。 本研究中的致盲病因。