So how do sunglasses work?
March 7th, 2010
Just like the bright sun shining in your eyes, as the dark surface of the sunglasses helps to block out bright light and make the world appear darker. The second is that the sun ultraviolet rays can be harmful in the long term, causing all sorts of problems with your eyes including loss of eyesight [...]
Original post by lasik enhancement
(click on the author/publication link above to see full post)
