Facts about sunglasses

Sunglasses may seem to be simply made of two pieces of glass or plastic in some type of frame. How simple can something be? There are actually a multitude of uses for these lenses, and if they are used properly, you could see fantastic results. As you may already know, or you'll find out after reading this article, there's a dizzying array of sunglasses to be found in the marketplace or on the web.

When considering sunglasses, there are four features to be considered.

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 can shield strong light. When additional light hits the eyes, the iris closes. After the iris has closed as much as possible then the next step is squinting. If there is still extra light, such as from the brightness of snow, then this will cause damage to the retina. Sunglasses should be well made to eliminate as much as 97 percent light to avoid damage to your eyes.

Sunglasses protect your eyes from the sun's harmful rays. Light reflection off surfaces such as water can cause bright spots. These spots can be distracting or prevent you from seeing an object. Great sunglasses can completely eliminate this kind of glare with polarization.

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.

Buying the appropriate kind of sunglasses you need for the situation gives you the most protection and performance out of a pair of sunglasses.

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