Sitting all day long with your computer leaves many bad effects on your eyes. 20-20-20 Rule is an easy eye exercise suggested by most Opthalmolotertergists. It is done for relaxing tired eyes. 20-20-20 simply means 20minutes-20feet-20seconds. There are many long articles across Internet about this 20-20-20 rule. But rule goes easy and is something like this: Your computer’s screen is bright and hence if you are not blinking your eyes as often as you should when sitting infront of your computer’s screen for many hours then it may cause some eye problems and most common is dry eyes sometimes followed by redness.
For dealing with this problem, 20-20-20 rule states that after every 20 minutes, a computer user should take a break of at least 20 seconds looking at objects that are 20 feet away from you.
Another thing you can do for saving your eyes is dim the brightness of your screen and keep it at some good distance.