Analysis Of Refractive Characteristics And Influencing Factors In Children And Adolescents In Wujiagang District,Yichang City

Background At present,the prevalence of myopia in children and adolescents is increasing year by year,which has aroused many researchers’ interest in the prevention and control of myopia and carried out in-depth research.Especially,in China,the education system with high intensity and high strict standards leads to the high prevalence of myopia in children and adolescents.Objective The refractive characteristics of myopia and its related influencing factors in children and adolescents in Wujiagang District of Yichang city were collected and analyzed.Methods First group of random Yichang wujiagang district children and adolescents(kindergarten,primary school,junior high school,high school each two),a total of 2331 people vision screening and myopia related factors investigation,further expand the scope of Yichang three city(wujiagang area,xiling,Xiao pavilion area),three county-level city(appropriate city,zhijiang,dangyang),two counties(yuan an,five peak tujia autonomous county)of children and adolescents vision screening,a total of 20779 people.Finally,the survey data are used for statistical analysis.Results(1)The myopia rate,moderate myopia and high myopia in Wujiagang area increase with the increase of grade.The myopia is common in myopia astigmatism.In myopic anisometropic eyes,the refractive degree in the right eye is high.(2)The myopia rate of girls in Yichang is higher than that in men(c2=51.565,(49)<0.001),The myopia rate in urban areas is higher than that in counties(c2=5.044,(49)=0.025<0.05),and the myopia rate in ordinary high schools is higher than that in vocational high schools(c 2=130.527,(49)<0.001).(3)In Wujiagang District,parents myopia or parents have myopia,suffering from allergic conjunctivitis,dark light,watching TV too close,watching electronics time> 2h,continuous close work time> 2h,often picky,sleep time <8h,poor sleep quality is the risk factors of myopia in adolescent children;students low academic pressure,often maintain the correct reading and writing posture,outdoor time and outdoor activities every week,these are the factors to protect myopia.Conclusion(1)The myopia rate of children and adolescents in Wujiagang District,Yichang City is 52.9%,and 25.6% of myopic people are refractive poor.At present,the myopic astigmatism dominates;myopia receives insufficient attention,and school individuals should accept correct knowledge of myopia prevention and control.(2)Continuous close working time> 5h(OR=4.587,(49)<0.001),myopia in both parents(OR=4.020,(49)<0.001)arethe most important risk factors for myopia,and increasing the time(OR=0.254,(49)<0.001)and frequency(OR=0.235,(49)<0.001)of outdoor activities is the most important protective factor for myopia.