Objective: To determine the situation of myopia among primary and junior high school students from 2019 to 2021 in Yinzhou District, Ningbo City, Zhejiang Province. Methods: Cross-sectional study. Department of Ophthalmology, The Affiliated People's Hospital of Ningbo University, carried out a cross-sectional study by reviewing the results of five times visual acuity screens among primary and junior high school students from 2019 to 2021 in Yinzhou District, Ningbo City, Zhejiang Province. The myopia rate, High myopia rate and spherical equivalent refraction were calculated according to the uncorrected distance visual acuity and non-cycloplegic subjective refraction. Chi-square test and analysis of variance were used to analysis the difference of myopia among term, sex and eye. Results: The visual acuity screen had been completed five times from 2019 to 2021 in Yinzhou District, with a total of 458 654 people, of which 454 812 people met the inclusion criteria. The myopia rate of each screen is 56.6%(50 443/89 122),52.5%(48 463/92 311),63.7%(57 968/91 002),53.2%(48 351/90 886),64.4%(58 920/91 491). The rate of Myopia increased gradually with promoting to high grade, and it was obviously in low grade,up to 17.6%. Conclusion: The myopia rate of primary and junior high school students was raising volatility from 2019 to 2021 in Yinzhou District, Ningbo City, Zhejiang Province.
目的： 探讨2019—2021年浙江省宁波市鄞州区中小学生近视的现状。 方法： 横断面研究。回顾性分析浙江省宁波市鄞州区2019—2021年期间每半年一次的全区在校中小学生视力普查结果，根据学生裸眼远视力以及非睫状肌麻痹电脑验光度数计算出当次普查近视率、高度近视率以及等效球镜屈光度。用卡方检验及方差分析对不同学期、不同性别、不同眼别间近视情况进行比较分析。 结果： 从2019—2021年宁波市鄞州区共完成5次普查工作共458 654人次，其中符合纳入标准的为454 812人次，各次的近视率分别为56.6%（50 443/89 122）、52.5%（48 463/92 311）、63.7%（57 968/91 002）、53.2%（48 351/90 886）、64.4%（58 920/91 491）。近视患病率随着年级段的升高逐渐增长，增长幅度以小学低年级最为明显，最高增幅达到17.6%。 结论： 2019—2021年浙江省宁波市鄞州区中小学生近视率呈波动性上升。.