what is the diference between polarized sunglasses and non-polarized sunglasses?

Almyra glasses · #1 (**permalink**) 07-31-2009, 01:47 AM

Sunglass lenses are are different in many ways ,there are polarized sunglasses ,prescription sunglasses,progressive sunglasses,and so on.polarized sunglass lenses are Optically active,while the non-polarized sunglss lenses are Optically inactive.

Appleton glasses · #2 (**permalink**) 08-01-2009, 04:56 AM

Quote:

Originally Posted by Almyra glasses

Sunglass lenses are are different in many ways ,there are polarized sunglasses ,prescription sunglasses,progressive sunglasses,and so on.polarized sunglass lenses are Optically active,while the non-polarized sunglss lenses are Optically inactive.

Appreciate!That really do great help to me ,but could you please explain more details about the optically active and optically inactive?