用電腦用幾耐最好休息呢?

if ok, 30 mins then take a break...walk around or just watch things from distance...cos when u use comuputer, yr eye is totally focus on short distance & create high pressure to your eyeball..thats why u got short-sighted...

by doing this exercise, it relaxed your eye....

30minutes..

半個鐘!!!!!!!!!!!!!!!!!!!!