biostudies-literatureUnknown6(3)Zhang XJ<h4>Importance</h4>Childhood myopia increased during the COVID-19 pandemic. Limited evidence exists about whether myopia development was reversed or worsened after the lockdown.<h4>Objective</h4>To determine the prevalence of myopia and its associated factors before, during, and after COVID-19 restrictions.<h4>Design, setting, and participants</h4>This population-based, repeated cross-sectional study evaluated children aged 6 to 8 years from the Hong Kong Children Eye Study between 2015 and 2021 in 3 cohorts: before COVID-19 (2015-2019), during COVID-19 restrictions (2020), and after COVID-19 restrictions were lifted (2021).<h4>Exposures</h4>All the children received ocular examinations, including cycloplegic autorefraction and axial length. Data about the children's lifestyle, including tJAMA network opene234080https://www.ebi.ac.uk/biostudies/studies/S-EPMC10034576biostudies-literaturePrevalence of Myopia in Children Before, During, and After COVID-19 Restrictions in Hong Kong.PMC10034576Kam KWLi YZhang XJYoung ALIp PPang CPZhang YNg MPHChen LJTham CCYam JCTang FfalsePrevalence of Myopia in Children Before, During, and After COVID-19 Restrictions in Hong Kong.<h4>Importance</h4>Childhood myopia increased during the COVID-19 pandemic. Limited evidence exists about whether myopia development was reversed or worsened after the lockdown.<h4>Objective</h4>To determine the prevalence of myopia and its associated factors before, during, and after COVID-19 restrictions.<h4>Design, setting, and participants</h4>This population-based, repeated cross-sectional study evaluated children aged 6 to 8 years from the Hong Kong Children Eye Study between 2015 and 2021 in 3 cohorts: before COVID-19 (2015-2019), during COVID-19 restrictions (2020), and after COVID-19 restrictions were lifted (2021).<h4>Exposures</h4>All the children received ocular examinations, including cycloplegic autorefraction and axial length. Data about the children's lifestyle, including t2023-01-01T00:00:00Z2023 Mar2025-04-21T14:34:37.294Z2025-04-21T14:34:37.294ZS-EPMC100345763694703710.1001/jamanetworkopen.2023.4080