Refractive Error and Visual Impairment Among School Children: Result of a South-Eastern Nigerian Regional Survey

To determine the prevalence refractive errors and causes of visual impairment in school children in the south-eastern region of Nigeria.School-based cross-sectional samples of children 5 to 15 of age in both urban and rural areas were profiled through cluster sampling. The main outcome measures were presenting, uncorrected, and best-corrected visual acuity using the Refractive Error in School-age Children (RESC) protocol.A total of 5723 children...