Abstract:  Objective To compare the prevalence of myopia in university freshmen with or without parents myopia. Design A school-based cross-sectional study. Participants 1795 freshmen of grade 2013 in China Geological University (Beijing). Methods Comprehensive eye examinations including visual acuity, ocular motility evaluation, auto-refraction, slit lamp biomicroscopy, ocular biometry and non-mydriatic fundus photography were carried out on all participants. A questionnaire on parental myopia and students study and eye using habits were carried out. Myopia, high myopia and severe high myopia were defined as a spherical equivalent (SE) refraction of ≤ -0.5 D，≤-6.0 D and ≤-8.0 D respectively. One-way ANOVA and Logistic regression analysis were used to analyze the influence of parental myopia status on children’ myopia. Main Outcome Measure The prevalence of myopia, the degree of myopia constituent ratio and OR values. Result The prevalence of myopia high myopia and severe high myopia in freshmen was 92.7%, 21.9% and 6.3%respectively. SE in those with both parental myopia, father or mother myopia and no parental myopia were -5.23±2.93D, -4.43±2.50 D, -3.41±2.30 D（P<0.001）respectively, and the corresponding prevalence of myopia was 91.6%, 93.9% and 95.3%, respectively（P=0.089）. Compared with the group of no parental myopia, OR for high myopia was 2.162（95%CI 1.617-2.892）, 2.289（95%CI 1.717-3.050） and 2.490（95%CI 1.714-3.618） in father myopia, mother myopia and both parental myopia respectively; and for severe high myopia, the corresponding OR was 4.169（95%CI 2.725-6.380）, 4.221（95%CI 2.763-6.450） and 7.052（95%CI 4.386-11.338） respectively. Conclusions In college freshmen, students with parental myopia were more susceptible to high myopia. In those without parental myopia, the myopic degree was lower.  (Ophthalmol CHN, 2015, 24: 36-39)

Key words: myopia/epidemiology, university student