The synthesized melanin in these sunglasses compensates for aging eyes' heightened sensitivity to glare and decreased visual acuity by filtering out damaging ultraviolet and high-energy visible light. By age 65, eyes lose about 50% of their reserves of melanin, the pigment that gives eyes their color, protects from UV damage, and reduces glare naturally. The lenses in these glasses are infused with melanin to offset this loss, which helps decrease eye fatigue and enhance contrast, allowing you to see details with sharper clarity and colors more accurately. The lenses are also polarized for maximum glare protection. The shatter resistant lenses are treated with a flash mirror coating for long life, and the lightweight elastic titanium frame is corrosion resistant and has memory-ability to recover its shape when bent. Micro fiber carrying pouch included. 6" L x 6" W x 1 1/2" H. (2 1/2 oz.)