Objective To investigate the refraction and the relevant factors of preschool children in Qingdao,and to provide basis for the intervention of children with poor vision.Methods With stratified cluster sampling method,a total of 8517 children aged 4-7 years from July 2020 to June 2021,covering 10 administrative municipalities in Qingdao.Refractive status testing was performed using a handheld SureSight automated optometer.The questionnaires were filled out by parents of preschool children.Logistic regression analysis was used to analyze the influencing factors.Results The total detection rate of ametropia was 13.22％.The detection rate of ametropia was 12.88％in boys and 13.58％in girls.There was no significant difference between boys and girls(x2=0.931,P=0.334).There was no significant difference in the detection rate of refractive abnormality among different age groups(x2=0.626,P=0.731).Living in rural areas,increasing sleep time,limiting the intake of sweets,increasing the distance of watching TV and parents'attention to children's eye hygiene were protective factors for children's refraction.Age,premature birth,using electronic devices for more than half an hour at a time and lying down to read books/cell phones were the risk factors(P＜0.05).Conclusion The detection rate of refractive error in preschool children is high,and it is recommended that targeted measures be taken to protect children's vision by combining the factors affecting refractive error.
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