Visual testing with 'preferential looking' in mentally retarded children.
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.
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