Optical Lenses for Glasses

When thinking of all the inventions in history you may think of the phone, planes, electricity, and television.   Who ever thinks of eyeglasses?  Without them how would some of see to do anything.  Imagine if you couldn’t read, or drive or see all the beautiful things in the world.  Imagine if you were blind.  Lenses within frames are what we refer to as glasses.  Your eye strength will determine the kind of lenses you will need in order to see.  In order to understand about lenses read this website.http://www.superbvision.com/2009/05/18/optical-lenses-for-glasses.html  Explaining what lenses do and how they work is very interesting.