[The cross-sectional study of dynamic refractive status in Xi'an middle school students].


PURPOSE To obtain the basic data of refractive status, especially the myopia prevalence rate in Xi'an middle school students. METHODS The cross-sectional study was conducted in two Xi'an city middle schools. The object ophthlmic examinations such as non-cycloplegic objective refraction, visual acuity, oculr pressure and fundus evaluation were taken on all… (More)


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