[thsksbd]

At what time? Where? How much?

Did you play an hour a day during solar noon?

(It would actually be cool to see if myopia rates change along towns near a time zone border -> kids getting out of school during the brighter time of the day)

[hosh]

They were comparing against kids in Australia. I forgot the exact details, but the policy developed was to add additional time during schools, and educating parents. Two hours a day cumulative, five day a week or something along those lines.

This isn’t something one has to spend a lot of time optimizing within certain latitudes, since there are benefits for kids being outdoors beyond halting progression of myopia. Although, if you think this can reverse myopia, it is worth biohacking.

If I recall, the article I read on this was posted on HN.