This trick you will love! A little knowledge about the anatomy of the human eye can go a long way. Even the ones with the worst eyesight can see objects clear without their glasses.
You might find yourselves in a situation where you cant find your glasses or you just forgot them. Or you will just like to play around with the cool trick from the video below.
Anyway, see how you can focus your eyes with only your hands. Create a small hole with your hand and fix your eyesight in a second. Check it out!