It's no news that we live in a busy world. Everyone is so busy today, that we often try to do more than one thing at a time. We even cave this ability a name – multi-tasking. When you multi-task, you place stress on your body … and you place stress on your eyes.
Conscious notice what you're looking at at the next time you multi-task. Chances are, you're trying to look at more than one thing at any one time. This "dispersion of your focus" places unnecessary on your eyes because your eyes are not meant to see more than one thing at a time.
Try this. Do you have a friend who loves perfect eyesight? Place two pebbles about 45cm (20 inches) apart. Pebble A and pebble B. Now ask your friend to look at Pebble A and then ask him / her if he / she can also see pebble B. If they do not put in the effort to do so, they can not.
But people with common eye problems such as myopia can do it effortlessly because it has become a habit of their heads. To improve your eyesight, simply try the exercise I mentioned above.
Only this time, try to see one pebble at a time. Remember, do not stare. Blink frequently (every 3 – 4 seconds) and take deep breaths. The benefit of this result is not directly correlated with the amount of effort you put into it. Quite the contrary, the more you can let go of the effort to see, the better result you'll get because at the end of the day, sight is just like any other senses. They should all be effortless.