Refractive errors and other ocular findings in school children.
D000293:Adolescent; D002648:Child; D005387:Finland; D006801:Humans; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000453:epidemiology*; D013285:Strabismus / Q000453:epidemiology; D014792:Visual Acuity