The synthesized melanin in these sunglasses helps relieve eye fatigue by filtering out 100% of damaging UVA/UVB ultraviolet and 98% of high-energy visible light. Available only from Hammacher Schlemmer, the sunglasses have lenses infused with melanin to decrease eye fatigue and enhance contrast, allowing you to see details with sharper clarity and colors more accurately. By age 65, eyes lose about 50% of their reserves of melanin, the pigment that gives eyes their color, protects them from UV damage, and reduces glare naturally. A convenient alternative to clip-ons, these sunglasses slip comfortably over most prescription eyewear frames and look like regular sunglasses. The shatter-resistant, polycarbonate lenses are polarized to block 99% of reflected glare. The sturdy nylon frame ensures years of use. Gray or Brown. 6" L x 6" W x 1 3/4" H. (2 1/2 oz.)