Brand name eyeglasses, ranging from RayBan to Oakley, detonate today's eyeglass market. If condition permits, eyewear buyers would prefer to buy designer glasses than ordinary ones. One of the reasons why they are so well received is that they are able to at least 99% block sunlight, which is fairly good for the wearers' eye health. Besides, the craft are exquisite, and rather cheerful and pleasing to eyes.
Why would those designer eyeglasses perform so well in UV prevention? The secret lies in a film of coating coated on the lenses. It is supposed to be able to absorb ultraviolet radiation and at the meantime block some strong light, in some degree reducing the light transmittance of lens, but the vision effect would not be influenced. What's more, the coating performs as a protection to the lenses as well. Usually lenses of brand name glasses are rather rigid and scratch resistant. That is to say, they are durable. Therefore, although brand name eyeglasses cost highly, they can be used for years, and average figure down, buying these eyeglasses is a good deal in the long run.
However, brand name eyeglasses are so popular that many replicas are produced. Those replicas are thought to be rather bad for eye health. Therefore, customers should and have to learn to discern the brand marks and logos. Replica glasses appear the same with certified ones, however, there must be flaws. In addition, certified eyeglasses would definitely be equipped with brand hang-tags, on which information concerning the manufacturers, the product itself, the materials, and functions would be printed in details.
Approaching the optical stores and seeing brand names of a great variety, customers would always ask what kind of brand name eyeglasses are of better quality? Which is supposed to block UV better?
The answer for them is that they should be aware of their purposes of purchasing those eyeglasses, for vision correcting, for blocking harmful rays, for shading, or merely for fashion. Only when they are clear what they want for those eyeglasses can they possibly get a pair suiting themselves.
At last, there is one small tip which are thought to be useful when one is intended to buy brand name eyeglasses. Sunglasses of dark colors are greatly recommended, and those of yellow, orange and light red, etc. would be the last choices, for they hardly able to stop any rays. Dark color, like grey, dark green and black, sunglasses can absorb UV and soften strong sunlight to the most extent.
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