title: Incidence and types of visual handicap in school age children in the Federal Republic of Germany: first results of a survey of 24 000 students.
mesh_terms: D000293:Adolescent; D002648:Child; D004519:Education, Special; D005860:Germany, West; D006801:Humans; D014786:Vision Disorders / Q000453:epidemiology*; D014787:Vision Tests