Colour blindness--a rural prevalence survey.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003117:Color Vision Defects / Q000453:epidemiology* / Q000235:genetics / Q000503:physiopathology; D005260:Female; D006801:Humans; D007194:India; D008297:Male; D008875:Middle Aged; D010375:Pedigree; D012423:Rural Health