[b_e_n_t_o_n]

I don't think that's true at all. I had prefect vision up until I graduated college and started spending 10hr a day behind a screen - within two years I ended up getting glasses, although they are a mild prescription and I don't really need them other than driving at night. My friend was in a similar position and they also ended up getting almost the same prescription.

My eye doctor said it was my eyes optimizing for what they do the most. And that makes sense, I have no eye strain using a computer.

Interestingly my vision is better in the summer, and when I take holidays during the summer and spent time away from the computer my eyes essentially fix themselves. It takes a couple months back behind a screen to need my glasses again.

[Eisenstein]

Counterpoint: I have spent 10hrs a day in front of screens since I graduated from college and my eyes are fine.

[b_e_n_t_o_n]

Definitely a genetic component as well!

[fogj094j0923j4]

Yes but it's might just be a different mechanism from childhood -> adult myopia. Where you go from perfect vision to -5