Prevalence Of Refractive Error And Its Influencing Factors In Students Of 5 Primary Schools In Wuxi City

Objective To investigate the prevalence of ametropia and its influencing factors in4237 children aged 7-12 years in Wuxi City.Methods A total of 4237 children from 5 primary schools in Wuxi city were randomly selected from November 2018 to December 2018 to have eye examinations including visual acuity and refraction status.The age-specific prevalence rates of ametropia were calculated,and children were divided into the normal group(SE >-0.5 d,n=2362)and the abnormal group(SE≤-0.5 d,n=1875)according to the refraction status.The multivariate Logistic regression model was established to identify the risk factors of ametropia.Results Significant differences were observed in visual acuity distribution among different age groups(P < 0.05),and the proportion of children with visual acuity <0.1,0.1-0.4,0.5-0.6,0.7-0.8 increased with age(P < 0.05),while the proportion of children with visual acuity > 0.8 decreased gradually(P < 0.05).There were significant difference in prevalence of ametropia among different age groups(P <0.05).The prevalence rate of ametropia in children 12-< 13 years old was significantly higher than that of other age groups(P < 0.05).There was no significant difference between the two groups in gender,refractive abnormalities and birth weight(all P > 0.05).The proportions of children with age ≥9 years,daily sleep time< 8 h,no good eye habits,unbalanced nutrition and no regular visual examination in the abnormal group were significantly higher than that in the normal group(P <0.05).Multivariate Logistic regression analysis showed that ≥9 years old,daily sleep time < 8 h,bad eye habits,nutrition imbalance and not regularly checked vision were risk factors of ametropia among children aged 7-12 years(all P < 0.05).Conclusion In 2018,among the 4,237 children from 5 primary schools in Wuxi city,the prevalence of ametropia was relatively high,and there were many influencing factors,such as age ≥ 9 years old,daily sleep time < 8 h,bad eye habits,nutrition imbalance,and not regularly checking eyesight,which should be paid close attention to.