Sunglasses is a tool designed to protect our eyes from harmful rays. Light radiation which considered dangerous, one of them is Ultraviolet. Ultraviolet rays are invisible, which has a wavelength of 10 nm to 400 nm. Although invisible, most people can feel the effects of UV, such as sunburn effect. UV rays also have a positive and negative effects. UV rays are divided into various types according to their wavelengths. The most famous is the UVA, UVB and UVC. UVA is ultraviolet light with a wavelength of 315-400 nm, while UVB has a wavelength of 280-315 nm. UVC is the most powerful rays with a wavelength of 100-280 nm.
When you buy sunglasses, you should consider whether the sunglasses are able to block UV rays as well. Exposure to UV light in a long time, believed to cause eye diseases and cancer. UVB radiation is considered more dangerous than UVA radiation. UVB radiation can cause sunburn on the skin. Therefore a good sunglasses should be able to effectively block UVB rays. Choose sunglasses that block 99% or 100% of all UV rays.
Another consideration when choosing sunglasses is the type of lens. Types of lens are used for different sports and driving course. There are sunglasses that have a single gradient lens, which can reduce the glare from above, but you can still see clearly down. This type of sunglasses suitable for use while driving. Sunglasses with double gradient lenses suitable for use for water sports and snow, such as skiing and sailing. Sunglasses of this type will reflect light from above and from below.
Besides the above, of course, you should see the style. In addition to blocking UV rays, sunglasses also must have a good style. One well-known brand sunglasses are Oakley sunglasses. And one interesting choice is collection of Oakley Flak Jacket. Oakley Flak Jacket sunglasses are typically used for baseball, because it can absorb light very well, but you can still see clearly. Equipped with black iridium lenses, oakley Flak jackets are also suitable for use for a variety of sports. You can also easily change lenses to suit your needs.
Another option is the Oakley Polarized Sunglasses. These glasses are suitable for use for the casual sport. Oakley polarized sunglasses comes with a lens that is able to block UV rays up to 100%. These glasses also have adopted the technology of High Definition Optics (HDO), so that it can be used for high-speed sports as well as resistant to heavy impact. Comes with a wide selection of attractive, oakley polarized sunglasses will fulfill your wishes.
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