Revue 606 eyeglasses are adorned generously with Swarovski crystals along the top of the eye frame. When light hits the crystals, they begin to sparkle, and when you look at the frame on a person's face it lights up with brilliance. This is a unique and hard to find frame. The clear and bright Swarovski crystals work beautifully in the crystal clear frame. You can also use the Revue 606 eyeglasses frame to make prescription sunglasses.