title: Screening for visual defects in preschoolchildren.
abstract: There is no evidence to support the suggestion that a widespread programme of vision screening at age 3 1/2 should be instituted. Some of the practical problems and defects of such a programme are outlined. If the issues raised are to be resolved by further research, identification of preschoolchildren who have visual problems will be facilitated by a screening procedure involving refraction and possibly a cover test.
mesh_terms: D000550:Amblyopia / Q000517:prevention & control; D002675:Child, Preschool; D003867:Depth Perception; D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening; D012029:Refraction, Ocular; D013285:Strabismus / Q000517:prevention & control; D014786:Vision Disorders / Q000517:prevention & control*; D014792:Visual Acuity