[tomp]

Did anyone compare the data from this paper with the development of myopia in northern countries (e.g. Finland), where winters are dark and kids (and adults as well) would probably get only a few hours of sunlight per day (in contrast, summers are very bright)?

[desdiv]

While myopia was not associated with the month of birth, there was a trend towards a higher prevalence of myopia among conscripts living above the Arctic Circle, consistent with the hypothesis that ambient lighting might influence refractive development.

https://www.med.upenn.edu/cpob/documents/Myopiaandnaturallig...