The Prophecy provides superior helmet and eyewear compatibility along with some of Smith’s best lens technologies. One of the most popular goggles of choice for those who wear prescription eyewear.Lens: ChromaPop everyday Green MirrorVLT: 23% (CAT 2)Size: Medium/LargeLens Shape: SphericalLensChromaPop everyday Green Mirror – With a 23% VLT Smith’s highly-versatile everyday range of lenses are designed for medium to bright conditions with a mirror coating to reduce glare.Visual Light Transmission, VLT, refers to the amount of light that penetrates a lens. A low percentage means less light passes through and a higher percentage lets an increased amount of light through. A lens with a lower VLT rating is better for bright conditions, where as one with a higher VLT is more suited for overcast and snowy days.