Yellow light is the enemy. It's hard for the eye to process and changes how you see the world. Not with a pair of 580s on. These patent-packed lenses raise the red, blue and green areas to amazing levels, while eliminating much of the yellow light. The result is purer vision, deeper colors and sharper contrast. Costa 580 lenses are available in gray, copper, blue and green mirrors, making them the perfect choice for any conditions.