Most people wonder, do I really need sunglasses?

The answer is YES– you need them to protect the eye against ultraviolent radiation. Here’s why those rays can be bad for unprotected eyes.

UV radiation is a component of solar energy. It is divided into three classes – UV-A, UV-B and UV-C. UV-C for the most part is absorbed by the ozone layer. Exposure to UV-A and UV-B radiation can have damaging short term and long term effects on your eyes.

Short term exposure to UC radiation at a tanning booth or even a long day at the beach without protective eyewear can not only lead to sunburn of the lids but also “sunburn of the eye” or photokeratitis. The symptoms are pain, tearing, red eyes and foreign body sensation. Fortunately, this is usually temporary and rarely causes permanent damage to the eyes.

Long term exposure to UV light may contribute to the development of cataract, pterygia(abnormal scarring of the surface of the eye), skin cancer of the lids and even macular degeneration. These changes can be permanent and lead to vision loss.

It is important to wear quality sunglasses that offer good protection at all times. A hat or cap with a wide brim may offer additional protection. Sunglasses have a variety of claims but the most important feature labeled is that their product “blocks 99% of ultraviolet rays.” Some manufactures labels say “UV absorption up to 400nm” which also means 100% UV absorption. Both plastic and glass absorb UV light but the UV absorption is enhanced by chemical additives.

Other properties such as infrared ray blocking, blue-blocking, polarization and mirror coating are personal preferences. The most important is UV blocking and that you wear them!

People who spend the majority of their free time outdoors are the most susceptible to UV and while most protect their skin with sunscreen, a large number neglect their eyes. From surfers to runners to hikers, a good pair of shades can keep your eyes in good health for the rest of your life.

Are you a vigilant wearer of sunglasses?