Vision screening of preschool children in mobile clinics in Iowa.
D000293:Adolescent; D000550:Amblyopia / Q000175:diagnosis / Q000628:therapy; D002648:Child; D002675:Child, Preschool; D005139:Eyeglasses; D005500:Follow-Up Studies; D006801:Humans; D007484:Iowa; D008403:Mass Screening; D008952:Mobile Health Units; D012017:Referral and Consultation; D014786:Vision Disorders / Q000175:diagnosis* / Q000453:epidemiology / Q000517:prevention & control / Q000628:therapy; D014787:Vision Tests