Eyesight
Hi there!
I recommend buying some plus lens glasses for reading. +1 to start with. Even if you don't need them but if you use them at computer work then the eyes can only progress in the "right" way and won't get nearsighted.
In the beginning it might feel a little odd but you can read and the eyes will adapt to it.
If you put on minus glasses that you normally get for nearsightedness the eyes will adapt the other way and you can get more nearsightedness from that.
Then common sense is also applied to it. Keep normal distance to screen and try to look away and focus on something far away from time to time.
Try to relax your eyes and use palming technique. You can find that if you search the net.
Have a nice day!