Comparative study of refractive errors in West Malaysia.
D000293:Adolescent; D000328:Adult; D000368:Aged; D044466:Asian People; D002648:Child; D002675:Child, Preschool; D002681:China; D006801:Humans; D006956:Hyperopia / Q000453:epidemiology; D007194:India; D008296:Malaysia; D008875:Middle Aged; D009216:Myopia / Q000453:epidemiology; D012030:Refractive Errors / Q000453:epidemiology*