Abstract:·AIM:To investigate the myopia prevalence of pupils in suburb of Shanghai and to study the variation in myopia prevalence to determine whether these variations are related to differences in area,gender and grade.·METHODS:Totally 3 elementary schools were selected by randomized cluster sampling,and 3517 pupils were enrolled in this study.We defined myopia as spherical equivalent >-0.50D after dilating the pupils with tropicamide.All statistical analyses were performed using the Statistical Package(SAS 6.12).·RESULTS:Qingpu district had a prevalence of myopia(14.53%)and pupils living in the town had higher rates compared with those living in the rural areas.Girls shared a higher rate than boys and higher prevalence of myopia was observed with increasing grades.·CONCLUSION:There is a high prevalence of myopia in Qingpu district.Prevalence of myopia is associated with area,gender and grade.·
