How does eyesight worsen?

I will refer you to my Blog and an article written about aging vision. http://contactlensking.blogspot.com/2009/10/purevision-multi-focals.html This article discusses the needs that must be met by...

If you put your eyes to close to it.

Depending on the size of the screen, if it's very small, it will worsen your eyesight.

no that's not possible

Glasses and contact lenses can make your vision clearer. However, they can be harmful to your eyesight in the long run. In order to improve your eyesight, you should do eye exercises designed to...