Cheap Sunglasses vs. Expensive Sunglasses • 12.12.09
There is nothing to expect from cheap sunglasses other than poor quality. Low standards are not a problem with reputed brand names because their best sunglasses represent a continuation of tradition and the preservation of good reputation. Lots of harm can be caused to the eye if low quality sunglasses are used. Dark lenses cause a dilation of the pupil, thus the entrance gate for the infrareds and ultraviolets will be a lot higher in the absence of UV protection features. The radiations could impair sight and cause a wide range of ophthalmic dysfunctions such as affections of the crystalline or cataract.
Image distortion is one other flaw of poor quality sunglasses. This is often caused by plastic lenses that have faulty dioptric values which have not been established by medical prescription. A further criterion to appreciate the quality of the best sunglasses is by comfort and face match. If you try more pairs on, you’ll see that there is a big difference between matching and not-matching glasses, as they have to fit well on the face. Then, the best sunglasses also reduce the light reflection or glare by the presence of an anti-polarizing coating.
Can we select the best sunglasses by color too? Well, there are different opinions here. The capacity to absorb the colors of the visible spectrum and the reduction of the light intensity vary depending on the color. Not anyone can wear dark lenses for instance because they can reduce visibility: this is the reason why drivers, pilots and many other wearers prefer gray. Green lenses have the highest efficiency in absorbing IR and UV radiation but they make certain colors hard to distinguish. Greenaffects the perception of violet, blue, red and orange. Nevertheless, when you are on vacation in some exotic location, green lenses make the best sunglasses, plus, this color has a very relaxing effect too.
Brown lenses are suitable in warm and cold environments as well, and they have a good capacity to absorb radiations. Yellow lenses on the other hand are not useful against intense brightness but are great for foggy weather or driving at sunset. The idea is that the best sunglasses are those that provide protection and comfort at the same time. Wraparounds have superior features too because they prevent the UV rays to affect vision on the sides of the eyes. And keep in mind that the price should not reflect the special design of the frames or their glamorous look but the properties of the lenses. Eye protection is the most important!
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