The school child and defective vision.
D000293:Adolescent; D001766:Blindness / Q000453:epidemiology*; D002170:Canada; D002648:Child; D002660:Child Guidance; D005128:Eye Diseases / Q000175:diagnosis / Q000453:epidemiology* / Q000628:therapy; D005260:Female; D006801:Humans; D008297:Male; D012572:School Health Services; D014481:United States; D014785:Vision, Ocular; D014830:Vocational Guidance