title: Statistical concepts in refraction.
mesh_terms: D002648:Child; D002675:Child, Preschool; D003951:Diagnostic Errors; D005069:Evaluation Studies as Topic; D006801:Humans; D007223:Infant; D008722:Methods; D012029:Refraction, Ocular / Q000592:standards*; D012030:Refractive Errors / Q000534:rehabilitation; D013223:Statistics as Topic