[An epidemiologic study of blindness and low vision in Shunyi county, Beijing].
Hu
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D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001766:Blindness / Q000453:epidemiology* / Q000209:etiology; D002386:Cataract / Q000150:complications; D002648:Child; D002681:China; D003318:Corneal Opacity / Q000150:complications; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012494:Sampling Studies; D015354:Vision, Low / Q000453:epidemiology*