ArticleFrontiers in public health2022
Myopia and axial length in school-aged children before, during, and after the COVID-19 lockdown-A population-based study.
Article in Frontiers in public health, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 1 of them a synthesis that pooled it.
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Who cites it
6 citing papers in PubMed, 1 synthesis or guideline pooled it, 7 citations in OpenAlex.
- Comparison of myopia progression among Chinese schoolchildren before and during COVID-19 pandemic: a meta-analysis.International ophthalmology · 2023Pooled it
- Long-term Impact of COVID-19-Related Behavioral Changes on Myopia Progression in Children: A Four-Year Cohort Study.Korean journal of ophthalmology : KJO · 2026Article
- Incidence of eye problems in children aged 3-6 years during and after the COVID-19 pandemic.Frontiers in medicine · 2025Article
- Compensatory Interactions between Corneal and Internal Astigmatism despite Lifestyle Changes.Children (Basel, Switzerland) · 2024Article
- Prevalence of myopia and refractive parameters among children and adolescents in Hi-tech District of Chengdu City.Frontiers in pediatrics · 2024Article
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Authors and funding
7 authors at 5 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: Myopic shift had been observed during the COVID-19 lockdown in young school children. It remains unknown whether myopic shift is accompanied with increase in axial length. We aimed to evaluate the impact of the COVID-19 lockdown on myopia and axial length of school children in China by comparing them before, during and after the lockdown. Methods: In this population-based cross-sectional study, school-based myopia screenings were conducted in the Fall of 2019, 2020, and 2021 (representing before, during and after COVID-19 lockdown respectively) in Chengdu, China. Myopia screenings were performed on 83,132 students aged 6 to 12 years. Non-cycloplegic refractive error was examined using NIDEK auto-refractor (ARK-510A; NIDEK Corp., Tokyo, Japan) and axial length was measured using AL-Scan (NIDEK Corp., Tokyo, Japan). Spherical equivalent (SER, calculated as sphere+ 0.5 Results: Myopia prevalence rate was 45.0% (95% CI: 44.6-45.5%) in 2019, 48.7% (95% CI: 48.3-49.1%) in 2020, and 47.5% (95% CI: 47.1-47.9%) in 2021 ( Conclusions: The COVID-19 lockdown had significant impact on myopia development and axial length, and these impacts remained 1 year after the lockdown. Further longitudinal studies following-up with these students are needed to help understand the long-term effects of COVID-19 lockdown on myopia.
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