Polarized lenses are used in sunglasses to reduce glare from reflective surfaces such as the surface of water or the hood of a car. Polarized lenses are considered to be the best UV protection out in todays market. Having as much as five time the protection of standard UV coatings on sunglass lenses. They accomplish this through a process called polarization, much like a venetian blind controls sunlight through a window. Sunlight itself is not polarized - light from the sun will either be absorbed or reflected horizontally, diagonally or vertically. The problem this causes lies in the horizontal reflectivity. Sunlight bouncing off a horizontal surface will strike the viewer's eyes at a similar angle. This means the glare from the surface of the water or the road or the car hood will be B. Polarized lenses have a laminated surface containing vertical stripes. These stripes only allow vertically-polarized light to enter the wearer's eyes. Glare is eliminated because the horizontally-polarized lightwaves cannot bypass the polarized filter.

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