Paediatric ophthalmology in Northern Finland--a population investigation.
D002648:Child; D002675:Child, Preschool; D003231:Conjunctivitis / Q000453:epidemiology*; D005387:Finland; D005500:Follow-Up Studies; D006306:Health Surveys; D006801:Humans; D007767:Lacrimal Duct Obstruction / Q000453:epidemiology*; D013285:Strabismus / Q000453:epidemiology*