[Cross-section investigation on refractive status and influencing factors of preschool children in Changdu, Tibet].

Objective: To investigate the influencing factors of refractive status of preschool children in Changdu, Tibet. Methods: From July 2020 to October 2020, a cross-section investigation was performed among preschool children in Changdu, Tibet. The general information was collected, and the uncorrected refractive status was recorded and investigated. The measurement data were expressed by mean±standard deviation, and the t-test and χ2 test were used...