Prevalence and trend of low vision among primary and secondary school students in Wuhan from 2019 to 2020

Abstract

Objective To provide a large-scale assessment the prevalence of poor vision in 2020 among children and adolescents in Wuhan City, Hubei province and to provide basis for healthy vision promotion. Methods This cross-sectional epidemiological study was conducted among 156 783 students, who lived in Wuhan during the COVID—19 period participated the vision screening through the online applet designed by Wuhan Center for Adolescent Poor Vision Prevetion and Control under the guidance of their guardians between June 19 and July 6, 2020. The demographic information and daily hours spent on various activities in the past week were investigated. The corresponding visual acuity data of students in 2019 before the COVID-19 outbreak was extracted from school vision monitoring records for each semester, which was measured by the experienced eye care professionals. Results The detection rate of poor vision (51.04%) in 2020 was significantly higher than that in 2019 (43.04%) (χ 2 = 68 944.95, P<0.01). After adjustment for covariates, the odds ratio and 95% confidence interval for poor vision were 1.17 (1.13-1.20), 1.07 (1.04-1.10), 0.67 (0.65-0.69) and 0.62 (0.60-0.64) in students with online class time, recreational screen time, indoor and outdoor activity time in the highest tertile, compared with the lowest tertile groups. Conclusion Increased rate of poor vision among primary and secondary schoool students deserves further concern. It is necessary to strengthen intervention of eyesight protection. Policies and programs aimed at improving opportunities for physical activities and decreasing multiple screen behaviors should be given priority. 【摘要】 目的 了解新型冠状病毒肺炎 (新冠肺炎) 疫情居家隔离及线上学习后, 武汉市中小学生视力不良检出率情况, 为中小学生视力防控提供科学依据。 方法 2020 年 6 月 19 日至 7 月 6 日, 利用武汉市青少年视力低下防制 (预防控制) 中心设计的在线视力筛査工具对 156 783 名中小学生进行视力筛査, 同时调査前 1 周学生室内外活动及视屏时间。学生 相应的 2019 年新冠肺炎疫情暴发前的裸眼视力从学校视力监测记录中获取。 结果 2020 年视力不良检出率 (51.04%) 髙 于 2019 年 (43.04%) (χ 2 = 68 944.95, P<0.01)。经协变量调整后, 相对于低分位数的网课时间、视屏娱乐时间、室内活动时 间、室外活动时间, 髙分位数的各类活动时间对于视力不良 OR 值 ( OR 值 95% CI) 分别为 1.17(1.13~1.20)、1.07(1.04~ 1.10)、0.67(0.65~0.69)、0.62(0.60~0.64)。 结论 武汉市中小学生 2020 年视力不良检出率较 2019 年显著增髙, 应加强 中小学生视力保护的广泛干预, 优先考虑改善体育活动机会和减少多种屏幕行为的政策措施。