title: [Blindness survey in Hunan Province, China].
mesh_terms: D001766:Blindness / Q000453:epidemiology* / Q000209:etiology; D002386:Cataract / Q000150:complications; D002681:China; D005260:Female; D006801:Humans; D008297:Male; D012494:Sampling Studies; D012737:Sex Factors; D014141:Trachoma / Q000150:complications