I'd like a source on that. AFAIK the leading factor is so called "near activities", or more specifically, lack of "far activities" (i.e. lack of looking at a distance, which makes your eyeballs get and keep proper shape and characteristics).
> In that regard cellphones (since they can be used outdoors) are a huge improvement over e.g. television.
Again, environment brightness, AFAIK, is way less important than the distance at which you are looking. Hence, looking at the TV is better than at your phone. And I suspect both are better than reading a paper book.
It has been determined very conclusively that myopia is caused by spending too much time looking at close objects. That was in my highschool textbook like 20 years ago.
Yes kids should spend more time outside but it has nothing to do with bright environment.
Cos I am very serious about having proper lighting on the room I work in. But always thought the screen should be dimmer than the room for some reason.
Thanks for taking the time to share your POV.
The evidence is actually pretty clear, what's causing this vast increase in myopia is not spending enough time in bright environments (i.e. outside) during one's formative years. In that regard cellphones (since they can be used outdoors) are a huge improvement over e.g. television.
If we actually cared about fixing the problem, we'd be making it easier for children to spend time outside and making outdoor environments more welcoming for them. But that would require parents to allow children some freedom, or maybe even actually make some lifestyle changes of their own, whereas the revealed preference of parents is to lock their children up indoors all day and night doing something that looks like "studying" (i.e. pointless drills).