It helps your eyes relax instead of squinting all the time," Graves says, "and that helps relax the rest of your body.Even though Griffey has been a bit slow testing the amber lenses, he was counting the days until a Reds off-day so he could try his gray-green set on the golf course. The gray-greens--used in stationary sports; the ambers are geared for speed sports--allow golfers to better differentiate the shades of green on a course.Golfer Justin Leonard has a pair of sunglasses with gray-green lenses, and he told Nike he is able to separate out every blade of grass. For baseball players, because amber blocks out blue light--"visual noise" to vision experts--red colors, such as a baseball`s seams, are accentuated.There are medical advantages as well to wearing the lenses, which basically are soft contacts with a tint that has been scientifically developed. Although light can leak through sunglasses, through the opening between the frame and the eyes, performance-enhancing contacts...