Sunglasses sometimes allows us a mature diction as well as continue helping according to our need. As a protective eyewear glasses, mostly in bright sunlight and high Energy visible lights, these sunglass prevents our eyes from damaging. But, in a badly light reflecting environment,e.g.- around Water, lake-side, use of Polarized Sunglasses are only way to get rid of this discomfort. It have been popular for years to Boatman and Fisherman who need to reduce reflect glare from water surrounding them. Beside fishermen, outdoor enthusiastic peoples who love to travel around, discovered the benefit most from this polarized sunglass including Golfer, Bikers, Joggers etc. This kind of sunglasses can be used for snow-driving to car-driving and, in fact, can reduce glare from a flat, long surface such as the hood of the car or the sunny road's surface in mid noon.Polarized sunglasses can also be worn indoors by light-sensitive people, including post-cataract surgery patients and those who continually exposed to bright lights through windows.
Lets talk how does polarized sunglass work! If we look over some ancient pages regarding glass, in the early 20th century they were also known as "Sun Cheaters" ( cheaters being an American slang term used for glasses ). In prehistoric and historic time, Inuit peoples wore flattened walrus ivory "glasses," looking through narrow slits to block harmful reflected rays of the sun. It is said that the Roman emperor "Nero" used to watch gladiator's fights with emeralds.
In bare eyes, Lights reflected from surfaces such as a smooth water or flat road generally is horizontally polarized. It means that, instead of light being scattered in all directions equally in more usual ways, reflected light generally travels in a more specific horizontally oriented direction. This causes an annoying and sometimes dangerous intensity of light and we experience it as glare. Polarized glasses or Polarized lenses...
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