For a baseball outfielder, there is nothing more worrisome than losing a fly ball in the sun. Outfielders focus on tracking the ball off the hitter’s bat to gain intel on height and trajectory. While ...

A progressive lens design is like a bi- or tri-focal lens in that it corrects more than one vision problem at a time. However, these lenses have no visible lines, improving the cosmetic appearance of ...

People who wear glasses know the hassle of swapping back and forth between regular prescription eyeglasses and prescription ...