Polarized sunglasses use perpendicularly slanting polarizers in the lenses. Since the light being reflected off the surface of the road or water is almost always horizontal, the polarized sunglasses block this light, thus eliminating glare.
Light of a single color can be described as a wave with a specified wavelength or as a photon with a specified energy. Light can also be polarized with the wave vibrations lying in one plane. Many materials respond differently in their ability to transmit light depending on the relation of the plane of polarization to the crystal axes of the materials. In optical microscopy, the light beams can be polarized by use of filters. With sunglasses the filters are vertically aligned to cut out the glare bouncing off the road or water.
Our eyes are light sensitive and the glare can accumulatively damage them over time. polarized sunglasses offer protection for your eyes during the daylight hours, especially when you are at the beach, on the mountain or driving.
The right pair of sunglasses will give your corneas protection from the sun’s ultraviolet rays. Research that has been done scientifically has linked the diseases cataracts, macular degeneration, snow-blindness, pterygium and skin cancer, to the corneas and retinas over exposure to Ultraviolet rays. So selecting sunglasses that say UV protection, will mean your sunglasses filter out UV rays.
An effective pair of sunglasses will protect your retinas from intense light. Your irises shut to protect themselves when they are exposed to intense sources of light. Squinting is a further means of protection if the light is even more intense. The longer your eyes are exposed to this intense and penetrating light, the harder it is on your retinas, and when the damage is done, it can be permanent.
Ensuring you wear polarized sunglasses when out in the sun, is a means of protection for your eyes.
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