Prevalence of myopia and its risk factors in urban school children in Delhi: the North India Myopia Study (NIM Study).
PurposeAssess prevalence of myopia and identify associated risk factors in urban school children.MethodsThis was a cross-sectional study screening children for sub-normal vision and refractive errors in Delhi.Vision the gel bottle audrey was tested by trained health workers using ETDRS charts.Risk factor questionnaire was filled for children with v