Blindness prevention. Prevalence and causes of blindness and visual loss.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001766:Blindness / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D003223:Congo / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012424:Rural Population; D014505:Urban Population