Smith Optics Marvine Archive Sunglasses, Tan Crystal/Green Frame Color: Green Lens Color: Tan Crystal Size: 51-46-19 Smith Optics Marvine Archive Active Collection Sunglasses/Eyewear Smith Optics Lens has Tapered Lens Technology that corrects the distortion by progressively tapering the lens from the optical center towards the outer edges. Light waves are thereby delivered straight to your eye resulting in zero distortion and true optical clarity. What you see is what you get