Sunglasses are known to protect the eyes from Ultra Violet Rays emitted by the sun. Sunglasses were introduced somewhere in the midst of the 18th century by James Ayscough. However, these were in experimental stages and were not exactly sunglasses. These were tinted glasses which used to stop sunrays from hitting the eyes directly.
Sunglasses have an interesting history. It is believed that flat smoky glass panes were used in China during the 12th century, as protective glasses for the eyes. These however did not provide any protection other than blocking sun rays from eyes.
In the early 19th century sunglasses were introduced in America by Sam Foster. These were inexpensive and produced in plenty. It was precisely in 1929 when Sam Foster started selling sunglasses on the beaches of New Jersey and Atlantic City. Initially Sunglasses were worn by celebrities to hide their faces from fans. Gradually it became a utility too. After the UV Rays protection was introduced in Sunglasses, it became widely used by many.
There are certain standards that sunglass manufacturers need to follow while making sunglasses. The European Standard is EN 1836:2005. The four ratings are 0 for insufficient UV protection, 1 for sufficient UV protection, 2 for good UV protection and 3 for full UV protection.
The most popular design of Sunglasses is the Aviators which was introduced by Ray-Ban for US Aviators. They later became fashion statement across the world.
Sun glasses are worn as fashion accessory also. Because sun glasses come in different fancy designs, people wear them as fashion items.
However, a sunglass always adds up to the over all appearance of a person, one should make sure that the sunglasses protect the eyes sufficiently from UV Rays and other impurities hitting the eyes directly when one is outside. We must avoid wearing cheap sun glasses because they can be more harmful than useful to the eyes.
Linus Orakles
http://www.authorclub.info/
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