METHODS: Cross-sectional study and cluster sampling were used. A total of 30 716 students aged 6 to 14 from 15 primary schools in Haicheng district, Beihai city, who had taken physical examination from October 2019 to January 2020, were selected for visual acuity and pupil diopter. SPSS17.0 statistical software was used for data analysis.

RESULTS: In the eyes of the 15 primary schools monitored in this study, 30 716 cases had mild myopia(29.62%), 0.50D < astigmatism < 2.00D(25.43%), metropia(21.05%)and mild hyperopia(15.85%). With the growth of age, the proportion of emmetropia and farsightedness declined as awhole. The proportion of myopia is on the rise. A total of 1 894 cases of wearing glasses 3 788 eyes. The rate of poor vision was 23.30%, and the rate of qualified correction of frame glasses was 64.57%. Compared with the left eye, the difference was statistically significant, and the P50 of the right eye was more negative than that of the left eye. The equivalent spherical mirror was compared between boys and girls. The difference was statistically significant, and the P50 of equivalent spherical mirror of girls was more negative than that of boys.

CONCLUSION: With the growth of age, the proportion of mild hyperopia and squarely eyes decreases year by year; The proportion of myopia increases year by year; Among the students with poor eyesight, the number of those who regularly wear glasses is small; However, after wearing glasses, there are still some students whose glasses are not up to standard. The refractive state of the right eye is more negative than that of the left eye; Female students tend to be more negative than male students in the refractive state.