Refractive status of children and adolescents in Gaoxin District of Chengdu
10.16835/j.cnki.1000-9817.2022.10.029
- VernacularTitle:成都市高新区儿童青少年屈光状态
- Author:
XIN Mei, ZHANG Xuemei,ZHAN Yu, LIU Qianqian, WAN Xuemei, NIE Huibin, WANG Xiaoxiang, TIAN Xixi, YANG Jie, LUO Honglin, GUO Han, YANG Ling, ZENG Liuzhi, LUO Jun, CHEN Zejun
1
Author Information
1. Department of Ophthalmology, Chengdu First People s Hospital, Chengdu (610095) , China
- Publication Type:期刊文章
- Keywords:
Refraction,ocular;
Myopia;
Prevalence;
Child;
Adolescent
- From:
Chinese Journal of School Health
2022;43(10):1565-1569
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the refractive status of children and adolescents aged 4-18 years in Chengdu, and to analyze the epidemiological characteristics of refractive parameters.
Methods:A cross sectional survey was conducted among 82 024 children and adolescents aged 4-18 years in Gaoxin District of Chengdu from August to September 2021. The prevalence of screening myopia, low vision rate, high myopia rate, refractive status and axial development were analyzed.
Results:The prevalence of screening myopia in students aged 4-18 years was 40.42%(33 158/82 024). Low myopia was 24.51%(20 108/82 024), moderate myopia was 13.05%(10 703/82 024) and high myopia was 2.86%(2 347/82 024). The prevalence of screening myopia was 1.81% (233/12 848) in kindergarten, 34.44%(17 095/49 644) in primary school, 79.73%(9 738/12 214) in junior high school and 83.25% (6 092/7 318) in senior high school. The rate of visual impairment increased by year from the age of 4, and the rate of myopia increased most rapidly from 6 to 15 years old, the prevalenct of high myopia was compared between adjacent age groups: there were statistical differences between 9-15 years old were more likely to be nearsighted than boys( P <0.035 7). Significant differences in screening myopia between 5- and 7-17 year old groups,and in boys and girls.The median total diopter was 0.40 D at the age of 4 and developed to -2.90 D at the age of 18 . The diopter of girls aged 8-15 years was higher than that of boys, and there was statistical significance( Z=-2.53, -4.09, -5.67, -8.64, -5.56, -4.97, -2.52, -2.14, P <0.05). The axial length gradually increased with age, with the mean value of (22.31±0.59) mm at 4 years old and (24.91±1.00) mm at 18 years old. The mean corneal curvature did not change with age (43.19±1.47)D.
Conclusion:6-15 years old is a especially critical period for myopia development. More efforts need to be taken to decrease the prevalence of myopia before 6 years old. Prevention of the development of high myopia should start before the age of 10. The prevalence of myopia in girls is higher than that in boys, more prevention and control of myopia should focus on girls.
