Vision screening of young children.
D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004215:Distance Perception; D005069:Evaluation Studies as Topic; D005556:Form Perception; D006801:Humans; D008722:Methods; D012017:Referral and Consultation; D013997:Time Factors; D014786:Vision Disorders / Q000175:diagnosis; D014787:Vision Tests / Q000592:standards; D014792:Visual Acuity