Liao M, Cai Z, Khan MA, et al. - Researchers performed this population-based retrospective study to calculate and assess the prevalence of reduced uncorrected distant visual acuity (UCDVA) in primary, middle, and high schools in 6 districts of Changsha, Hunan, China. This investigation was carried out in 239 schools in 6 districts of Changsha. The survey enrolled 250,980 eligible students from primary, middle, and high schools after routine eye examination to rule out diseases that can affect refraction. In 6 districts of Changsha, the overall prevalence of reduced UCDVA was 51.8%. Among primary, middle, and high school students in Changsha, the prevalence of reduced UCDVA is very high. Any proactive steps to avoid this need to be taken.