Computer Glasses with Sheer Vision Clear Double Sided Anti Reflective Lenses - Phenom Metal Frame - 49-18-140 Sheer Vision is an enhanced polycarbonate plastic lens material with a unique coating applied to both the front and back surfaces. This unique coating eliminates the glare from any computer monitor while the enhanced polycarbonate material blocks the harmful UV light rays coming from the screen. The combination of these two materials on a single lens allows the user to view the computer monitor with a softness and a contrast between colors unlike ever before. Computer Eyewear product that not only does the job, but is the most comfortable and stylish to wear. Not only do Sheer Vision products reduce glare and UV light intake, but our state of the art lenses ALSO reduce headaches that usually are caused by prolonged, unprotected exposure to the persistent onslaught of harmful rays from all computer monitors.