With all the variety you'll want to know ahead of time what the differences are between tinted, reflective, photochromic and polarizing lenses. Of course the style of frame and size of lenses will be obvious differences when shopping for sunglasses. It will also be important to know exactly what purpose you'll be using your sunglasses.
Everyone is at risk for sun related eye problems. People who spend long hours in the sun during work or outdoor activity are at higher risk, than someone who is working indoors all day long. Other people may be at higher risk of eye damage if they are on certain medications such as; tetracycline, birth control pills, diuretics and sulfa drugs.
Whatever sunglasses you select they should provide the most possible UV protection possible. It's good to find a pair of glasses that block the sun from all angles, best achieved with a large framed pair that wrap around the face. Gray tints are generally used as an all- purpose tints reducing the overall brightness with the least amount of color distortion. The gray lenses are a good lens for general use and driving. Brownish and amber tints are another example of good all-purpose glasses.
The reason the process is called half-silvered is because the reflective molecules applied over the glass is distributed evenly but only half the glass is covered because of the speckled process. Thus the surface will reflect only about half the light striking the surface, letting the other half go through the glasses. The lenses have millions of molecules of substances such as silver halide or silver chloride. When the lenses are exposed to UV rays from the sunlight, the molecules embedded in the lenses undergo a chemical reaction causing them to absorb light thus darkening.
However, if you avail yourself of several offers, you could accumulate a sizeable collection of designer sunglasses and not pay one penny for them. Online prices are cheaper so it will seem as if you are getting the sun glasses wholesale. If it doesn't matter what kind of sunglasses you get, then you can do a search through many sites to find the lowest price sunglasses. If you and a friend team up to place the order, you get the designer sunglasses you want for half price or sunglasses wholesale.
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