Focusing on a short distance for a long period of time has been associated with myopia (though I'm not sure if they've established a causal link).
I didn't really answer your question. Sorry. No I'm not aware.
Focusing on a short distance for a long period of time has been associated with myopia (though I'm not sure if they've established a causal link).
I didn't really answer your question. Sorry. No I'm not aware.