METHODS:The data was from November 2018 to January 2019 in Gaoping, Shanxi Province. A multi-stage sampling method was used to select 181 big class children from kindergarten, 948 primary school students, 432 middle school students and 244 high school students. The questionnaires were distributed to those students, vision and diopter tests were conducted. Based on that information, the study analyzes the occurrence of myopia and its influencing factors in adolescent and children's cohort in this area.

RESULTLS: Totally 1805 students were selected in this study. The detection rate of poor eyesight was 78.28%(1413/1805). The prevalence of myopia was 64.38%(1162/1805), and the rate of wearing glasses was 51.46%(598/1162)in the myopic population. With the development of learning stage and age, the prevalence of myopia increased. The prevalence of myopia in girls(66.81%)was higher than that in boys(61.73%), and the prevalence of myopia in urban areas(66.54%)was higher than that in rural areas(61.52%). Regression analysis results show that learning distance is a protective factor for the occurrence of myopia, while daily learning time, sweet food, time of first vision decrease, and interval between time of first vision decrease and time of wearing glasses are risk factors for myopia.

CONCLUSION: The prevalence of myopia among adolescents and children in Gaoping, Shanxi Province is relatively high. Using eyes at close range for a long time, unreasonable diet, and lagging prevention and intervention measures are all factors that can cause myopia.