title: Visual testing with 'preferential looking' in mentally retarded children.
abstract: In 21 out of 26 children and young adults with mental retardation visual acuity could be successfully examined with operant preferential looking. There was a good correlation in this group of patients between ocular abnormalities demonstrated in an ophthalmological examination and the visual acuity results.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000150:complications*; D008297:Male; D014786:Vision Disorders / Q000150:complications* / Q000175:diagnosis; D014787:Vision Tests; D014792:Visual Acuity