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In reference to Ray-Ban sunglasses, their GPL lenses are polarized. The GPL stands for Glass Polarized Lens.
Polarized sunglasses are designed to vertically filter out glare from sunlight or bright lights. Self-tinting, or transitional lenses, are lenses that turn brighter or darker depending on the intensity of sunlight hitting the lenses.
Tint is mostly cosmetic. Polarized lenses block the harmful rays and are better for your eyes.
GSM label in RayBan sunglasses stands for Gradient Silver Mirror. This is mainly found in Polarized models, where the upper zone of the lens is darker than the bottom (in a gradient way), and the exterior side (opposite from where you look when wearing on them) has a silver mirror effect.
Polarized sunglasses have lenses designed to reduce glare from reflective surfaces and bright light. People use them to improve their visibility under such circumstances.
Polarized sun glass lenses are made to neutralize the effect of glare. A 'glare' is caused when the sun's shining rays reflect off a solid surface or water. A 'glare' is typically horizontally polarized. And the lenses are made of vertical polarizes so that they will effectively neutralize the villainous glare! Advantages of Polarized Sunglasses: Polarized sunglasses are specially made for reducing the harmful effects of glare and eye-damaging light. And they are a perfect boon, for all your outdoor activities. http://www.sunglassreplicas.com/Polarized_Sunglasses_s/50.htm i don't know much about self-tinting sunglasses.
No, they are not polarized.
Polarized sunglasses have popular among boaters and fishermen for many years. For some people who love fishing or boating, they also like to wear it. Besides, since it can cut out glares, polarized sunglasses are great for any sport or activity. Polarized lenses were first used by sportsmen.
Maybe 2003
rayban
polarized lenses designed specifically to protect the eye from ultra-violet rays. Another innovation was bendable plastic frames for sports-related sunglasses.
RayBan RB 2132 Wayfarer sunglasses