Two slabs of tinted glass or plastic in a metal or plastic frame can make sunglasses look pretty basic. What more can there be to them? In reality, there are many variables in sunglasses and these variables can have a significant impact in how the lenses are used. As this article will explain, there are many different ways to manufacture sunglasses.
These are the four things you should look for when purchasing a high quality pair of sunglasses.
First, the sunglasses should provide protection from ultraviolet rays. Light from ultraviolet (UV) rays can damage both your cornea and your retina. A high quality pair of sunglasses might completely eliminate any UV rays.
Sunglasses protect your eyes from strong light. The eyes respond to strong light by closing the iris. After the iris has closed as much as possible, then the squinting begins. But if there is still an overabundance of light, as when sunlight is reflecting off of snow for example, damage could be done to the retina. Sunglasses are considered to be "good" if they block out at least 97% of the damaging rays that are constantly streaming towards your eyes.
Sunglasses eliminate glare. Surfaces such as water typically reflect a great deal of light, producing bright spots which can not only be troubling, but might in fact be hiding unseen objects. Good glasses which are polarized can completely get rid of this type of glare.
Sunglasses will block certain light frequencies. While contrast might be improved by some frequencies of light, certain others can blur vision. Finding the right color sunglasses has its benefits in certain situations.
Buying inexpensive sunglasses typically means that you lose all these benefits and possibly make the situation worse. For example, your exposure to UV rays increases if your sunglasses do not provide UV protection. Cheap sunglasses will stop some light and this will cause the iris to open even more and will let in more light. This will let in more UV light also and cause more retina damage.
Hence, there obviously is a difference. For maximum protection and performance, you should invest in the right pair of high-quality sunglasses.
About the Author:
Author Shane Knight is a popular freelance writer who contributes articles on many different topics.sunglasses Get a totally unique version of this article from our article submission service
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