A mother notes that her 6-year-old who is no longer attending school in person but on Zoom has blurred vision. She wonders if computer use is causing a need for glasses.

Is there evidence linking both?


Journal Club Issue #13


In today's journal club, we review a study by Wang et al looking at the prevalence of myopia in young children both pre and during the pandemic.

The study was a cross-sectional study in which the degree of myopia was measured in over 100,000 children over different years (pre-pandemic) and during the pandemic.

The data showed that:

  • The prevalence of myopia was significantly higher in the COVID period for young children (4 times higher in the 6-year-old group)/li>
  • The association was not statistically significant in older children
  • Myopia prevalence, in general, rose as the patient’s age rose


In this journal club's accompanying 9 min. video, we'll review:

  • What defines a cross-sectional study
  • What defines a cohort study
  • What defines a case-control study


Wang J, Li Y, Musch DC, Wei N, Qi X, Ding G, Li X, Li J, Song L, Zhang Y, Ning Y, Zeng X, Hua N, Li S, Qian X. Progression of Myopia in School-Aged Children After COVID-19 Home Confinement. JAMA Ophthalmology. 2021 Mar 1;139(3):293-300. doi: 10.1001/jamaophthalmol.2020.6239.