Interesting study. Myopia can definitely be caused by focusing too much on nearby things.
I just so happen to have Hyperopia with astigmatism, neither of which came from a lack of outdoor exposure. (If anything, I needed less time outside).
That's a bit of the issue I have with such a broad generalization. It's true that for some, a lack of time outdoors damaged their eyesight, it's not universally true that all or perhaps even most poor eyesight is a result of staying indoors.
I just so happen to have Hyperopia with astigmatism, neither of which came from a lack of outdoor exposure. (If anything, I needed less time outside).
That's a bit of the issue I have with such a broad generalization. It's true that for some, a lack of time outdoors damaged their eyesight, it's not universally true that all or perhaps even most poor eyesight is a result of staying indoors.