Eye strain occurs on over-using the eye muscles. Any muscle held in the same position for a long time will strain. If you're above 40 years, eyestrain may also be a sign of necessity for reading glasses. Try these simple tips:
- Close and relax your eyes often.
- Blink a lot, as it helps your eyes in refocussing.
- Avoid using decongestants, that can dry your eyes.
- While outside, wear a broad-brimmed hat / sunglasses.
answered by r k