title: Stereoscopic depth perception in mental retardation: the problem of directional disparity.
mesh_terms: D002648:Child; D003867:Depth Perception; D004192:Discrimination, Psychological; D005133:Eye Movements; D005260:Female; D005556:Form Perception; D006801:Humans; D008607:Intellectual Disability; D008297:Male; D013997:Time Factors; D014794:Visual Fields; D014796:Visual Perception