Seems like the researchers are not interested in telling you that, however.
Children spend most of their time indoor—would you want something to happen to them outdoor? Surely not, right?! But surely it must be those pesky screens.
If that's not clickbait, then that's a hugely sensationalist title to something that is at best ignorant and at worst misinformation; I don't usually flag posts but I'm flagging this one.
[1]: https://en.wikipedia.org/wiki/Myopia#Environmental_factors
Not that I would choose them over regular glasses but now that I have the idea in my head I can't help but think about it.
I'm not in the field at all, though.