Know More About Ultraviolet Protection And Buying Sunglasses ...

All of us know that ultraviolet light can be damaging. UV light is a form of electromagnetic radiation. The human eye can see radiation with wavelengths between 400 to 700 nanometres and this is referred to as visible light. On the other hand, ultraviolet light has a shorter wavelength than visible light and cannot be seen by the human eye. The term ultraviolet light was coined from the spectrum of waves with frequencies higher than those that humans identify as the colour violet. Sunlight contains both visible light and the shorter invisible UV light. There are three types of ultraviolet light and these are UVA, UVB, and UVC. UVA is long wave light that can pass easily <a href="http://www.cheapnikefreeshoes.com/nike-free-30-v3-shoes-c-22.html"><strong>Nike Free 3.0 V3 shoes</strong></a> through the ozone layer of the earth. This light penetrates deep into the skin and can cause premature skin ageing and skin cancer. Of the ultraviolet radiation that reaches the earth, almost 99 percent is UVA. But this is not only found in the rays of the sun but also in tanning beds. In fact, tanning beds can give off two to five times more UVA radiation than the sun. In the past, it UVA was considered less harmful but it is now known that it causes DNA damage. UVA can pass through glass easily and some experts believe that UVA damages the eyes. UVB radiation is a small but dangerous part of sunlight. Most of the UVB from the sun is absorbed by the ozone layer. However, prolonged exposure causes sun burn and eye damage. This type of radiation is stronger than UVA radiation, causing burning, premature skin ageing, skin cancer, and serious eye problems. UVB rays are very dangerous, making sunscreens and sunglasses a must for anyone who wishes to <a href="http://www.ghdstyleronsale.com/ghd-mini-styler-p-21.html"><strong>GHD MINI STYLER</strong></a> stay outdoors. UVC radiation is the strongest and most dangerous form of UV light. The good news is that these do not reach the atmosphere and to not reach the surface of the earth. Most people believe that there is no need for sun protection when the sky is overcast. But the truth is that even on a cloudy day, UV light can go right through clouds, especially between ten in the morning to three in the afternoon. High levels of UVB light are dangerous to the eyes and may cause corneal and retinal damage and also lead to the development of cataracts and pterygium which is a thin tissue that grows over the white part of the eye. Ordinary sunglasses can give some protection. Usually, plastic lenses provide more protection than glass lenses since UVA light can pass through glass. Plastic lens materials such as polycarbonate block most of the ultraviolet rays. There are also sunglasses with protective treatments to better shield against the sun. Having sunglasses ready will ensure immediate protection from sunlight. Few people know that even glare and reflections can be dangerous to the eyes too. Driving can cause significant exposure since windshields are a big <a href="http://www.suprasforcheap.com/supra-fashion-shoes-white-with-red-p-114.html"><strong>supra fashion shoes white with red</strong></a> glare source. Even reflection from the snow, water, or sand can increase the risk for eye damage. Look for sunglasses that offer from 99 to 100 percent protection from both UVA and UVB light. There are also wraparound sunglasses that prevent harmful ultraviolet rays from entering around the frame, providing protection all around the eyes. There are several basic sunglasses and designer sunglasses to choose from. Ted Baker sunglasses are one of the fashionable eyewear brands that offer 100 percent protection from harmful UV rays. Although it started as a British clothing retail company, it became one of the most sought after labels because of the unique and original collection. The ted baker sunglasses ensure the most modern materials, highest quality, and 100% UV protection. Another popular designer brand is Emporio Armani. The men and womens emporio armani sunglasses offer a fantastic range of designs and are certified to provide excellent UV protection as well. With so many brands available, buying sunglasses direct online can be easier and undoubtedly, cheaper. A knowledgeable and trustworthy online optician can help choose tints and frames that are best suited to individual needs. Most of designer brands are available at discounted prices over the Internet. 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