1 Concentrate on a point 20 feet away for 2 minutes. by doing this Exercise focal length of your eyes will change which will remove strain of your eyes.
2 Second Exercises is very simple. Just close your eyes and keep both of your hands on your eyes for few minutes but remember that your eyes must not be toward computer will doing this Exercises.
3 Third Exercises is that keep Concentrate a point on your finger then bring finger towards your eyes. after it move your finger to right side but keep Concentrate on that point of your finger and then move you finger to left side.
try these three Exercises and they will help you greatly in removing strain of your eyes. you can try these exercises daily. i hope that my post was useful for all the readers.