this post was submitted on 18 Jul 2025
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There's evidence piling up that there is an inverse correlation between outdoor time in childhood and nearsightedness. It's believed that the brightness of sunlight helps stimulate eye growth in a spherical shape, whereas children who don't get a lot of sunlight are more likely to have eyes grow in a non-spherical shape with greater distance between the lens and the retina.
You can search the scientific literature for myopia and childhood sun exposure for a large number of studies on the topic.
Does screen time correlate with myopia? Maybe, but through the confounding variable that both stats tend to be inversely correlated with sunlight exposure.