Costa Del Mar Inlet Black Sunglasses with Gray 580P Lenses 。Costa Sunglasses according to website: Cuts haze and blur for greater clarity In addition to 100% protection from UV light, 580 technology also absorbs HEV light known to cause macular degeneration, pterygium, cataracts and other eye diseases Enhancing Reds, Greens, and Blues Blocking harsh yellow light at 580 nm on the visible light spectrum boosts the amounts of red, greens and blues naturally, enhancing colors and contrast Filtering Out Harsh Yellow POLYCARBONATE C-WALL=SCRATCH-RESISTANT