It is important for vryon to kp good ysight. But do you know how to protct your ysight? First, don't kp your ys working for a long tim. You'd bttr hav a rst by looking in th long distanc aftr you hav studid an hour or so. Scond, pay attntion to th following: Don't rad in th sun or in a poor light; don't rad in bd or in a moving bus. And whn you rad you should kp th book away from your ys for about a foot. And third, do y-xrciss vry day. It will also hlp you kp good ysight. If you oby th ruls abov, I think, you may prvnt your ysight from bcoming short-sightd.