title: [Physiologic values of ocular refraction in Chinese preschool children].
mesh_terms: D002648:Child; D002675:Child, Preschool; D002681:China; D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening; D012016:Reference Values; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000453:epidemiology*; D014792:Visual Acuity