Prevalence of visual and ocular anomalies in 168 non-institutionalized mentally retarded children.
D000293:Adolescent; D000367:Age Factors; D002170:Canada; D002648:Child; D002675:Child, Preschool; D005128:Eye Diseases / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000150:complications*; D008297:Male; D014786:Vision Disorders / Q000453:epidemiology*; D014787:Vision Tests