Refractive errors in Nigerians: a hospital clinic study.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001251:Astigmatism / Q000453:epidemiology; D044383:Black People; D002648:Child; D005260:Female; D006784:Hospitals, Teaching; D006801:Humans; D006956:Hyperopia / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000453:epidemiology; D009549:Nigeria; D009887:Ophthalmoscopy; D011305:Presbyopia / Q000453:epidemiology; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000453:epidemiology*; D014792:Visual Acuity