title: Visual assessment with preferential looking techniques in mentally retarded children.
abstract: An operant preferential looking technique was successfully used for testing of visual acuity in mentally retarded children with visual dysfunction.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003216:Conditioning, Operant; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000150:complications*; D008297:Male; D014786:Vision Disorders / Q000150:complications / Q000175:diagnosis*; D014787:Vision Tests / Q000379:methods*; D014792:Visual Acuity