title: Preliminary epidemiological study on the causes of blindness in one region of Ethiopia.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001766:Blindness / Q000453:epidemiology*; D002648:Child; D002675:Child, Preschool; D005002:Ethiopia; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008875:Middle Aged