G-15 XLT lenses provide natural vision while maintaining true colors, offering better contrast. B-15 XLT lenses offer enhanced contrast and provide a warmer perception of colors compared to G-15 XLT lenses.
B-15 and G-15 both refer to specific colored sunglasses lenses. The B-15 are brown in color, which offers slightly heightened contrast as they block a bit more of the blue color spectrum. G-15 are a gray/green colored lens originally developed by Bausch and Lomb in 1951 for the Navy Air Corps as the N-15. It was through minor reformulation for prescription use that the designation was changed to G-15. The benefit of the G-15 lens is that it transmits natural color to the eye, so that while everything appears darker (as 85% of the incoming light is blocked, the same as with the B-15), the color of what you are looking at is not influenced by the lenses. What you are using your sunglasses for, and your own preference are the way to determine which you prefer. From a perspective of natural eyesight, the G-15 is technically superior.
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B-15 lens are brown in color and G-15 lenses are gray-green. Polarized lenses come in both colors and on the lens it's written Ray Ban P
Ray-Ban's G-15 lenses are some of the darkest lenses available from the brand. These lenses provide excellent protection from bright light and glare. They are a popular choice for outdoor activities and driving in sunny conditions.
A polarized lens cuts more reflected glare but the actual protection of polarized lenses and G15 lenses are the same. Polarized sunglass lenses reduce glare reflected off roads, bodies of water, snow, and other horizontal surfaces where the G15 lenses do not.
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