Sleep time and homework hours/daily are associated with reduced visual acuity among school students aged 9–18 in Shenyang in 2016

Purpose: The purpose of this survey was to explore the prevalence of reduced visual acuity and its associated factors among school students in Shenyang in 2016. Methods: This was a cross-sectional study using data from the Ministry of Education’ Student Physical Fitness (MESPF) monitoring in 2016. A total of 13,642 students aged 9–18 years were surveyed in Shenyang. The unaided distance visual acuity was measured, and questionnaire on lifestyle behaviors that may affect visual acuity was investigated among students. The prevalence of reduced visual acuity and its associated factors were analyzed. Results: The average prevalence of reduced visual acuity among students aged 9–18 years was 65.8%, and severe reduced visual acuity was main (42.9%), and there were statistical effect of age, gender, and region on the prevalence of reduced visual acuity. Binary and multi variable logistic regression results revealed that students sleeping