Prevalence and associated factors of myopia among school students in Shenyang, China: a cross-sectional study
This study aimed to determine the prevalence of myopia among students in Shenyang, Liaoning Province, China, and investigate the factors influencing its development. They examined 34,644 students, finding an overall myopia prevalence of 60%, with 45% having mild myopia, 13% moderate myopia, and 1.9% high myopia. Factors associated with a higher risk of myopia included being female, at a higher educational stage, having a family history of myopia, and spending more than 2 hours on homework or reading. Conversely, factors associated with a lower risk of myopia included doing eye exercises at school, going outdoors during recess, reading and writing with the eyes more than one foot from books, and sleeping for more than 8 hours a day. These factors had varying impacts on different subgroups, such as gender and educational stage. The study also highlighted the high prevalence of myopia in Shenyang, largely attributed to genetic factors and the heavy academic workload, emphasizing the importance of controlling environmental factors to prevent myopia.