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Sunglasses have become a popular fashion accessory today, but have you ever wondered how they came into being? You would be fascinated to know that the Roman emperor, Nero, observed gladiator combats by holding polished green emeralds in front of his eyes. A precursor of sunglasses was known to exist around the 12th century in China. The purpose of these sunglasses wasnt to protect the eyes from the sun, but they were worn by Chinese judges to conceal their facial expressions. Smoked coloured quartz lenses acted as a veil to their eyes which kept their decision a secret till it was revealed. Later, in 1430 vision correcting dark glasses were introduced in Italy. Much later than that, James Ayscough bought sunglass ray ban sunglasses uk es for the public in 1750. After some research, he concluded that green or blue tints helped in correcting certain vision related impairments. Protecting the eyes from the suns glare was not a concern at this time. In the early 19th and 20th century, ...
Eyes and the Winter Sun For many people, sunglasses are meant to protect the eyes from bright light during summer. But you also need to take care of your eyes during the winter season. In case you want to get away to the ski slopes or an exotic, sunny destination during winter, you must make sure that your eyes are protected from the sun. On the other hand if you are staying at home and its snowing outside then you must protect your eyes from UV rays reflecting off the snow. Though you can opt for goggles during winter, sunglasses can be a popular alternative and may make it easier for you to drive and do outdoor jobs. Choosing goggles or sunglasses is up to you, but the wise thing to do is to go for options which protect your eyes from UV rays. The reflection of these rays from the snow cannot only be harmful for your eyes but also make it difficult for you to see where you are going! UV rays can cause cataracts, pterygium, age-related macular degeneration AMD, and sk ray ban website ...
Polarized Sunglasses Polarized sunglasses have become popular among youth especially for those who take part in outdoor sport activities such as biking, golfing, jogging, car-driving and a lot more. These sunglasses are also widely acceptable among fishermen while boating as this help them to reduce the shining sunlight or glare reflected by water. These sunglasses can also be used during the snowy weather as to get some clarity of vision. Eye specialists advise to wear polarized sunglasses to those persons whose eyes are more responsive towards light. What are Polarized Sunglasses? Polarization is a scientific phenomenon caused in a light wave vibrating in multiple directions. When the same light wave is restricted to vibrate in just one direction or plane with the help of Polaroid filter then it is said to have been polarized light. Generally, it is considered that light waves vibrate in two planes vertical and horizontal and when it ray ban 3025 passes through any Polaroid filter;...
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