The Color Of Your Sunglasses By Mark Hawran At Isnare.com Ezine Articles

The color of sunglasses is an important factor in the protection, or lack of it, that these furnish against ultraviolet and infrared radiation. Sunglasses that are tinted gray are believed to give the highest protection. Almost as good are those tinted brown or green. But sunglasses tinted blue or purple can be dangerous. Said Science Digest: "Blue or purple sunglasses can expose you to more ultraviolet radiation than no sunglasses at all! That happens because a dark lens causes your pupils to dilate, which means blue or purple sunglasses inflict ultraviolet on your eyes after 'tricking' them into lowering their defenses against sunlight.

Many of the sunglasses sold in stores do not significantly filter out the sun's ultraviolet rays, says Anthony Cullen, professor of optometry at the University of Waterloo in Ontario, Canada. According to Cullen, an expert on radiation hazards, this may lead to the development of cataracts or other vision problems later in life. Usually, people squint to protect their eyes from bright sunlight. But because sunglasses make the light appear less bright, wearers tend to keep their eyes wide open, allowing the invisible ultraviolet light to enter and possibly damage their eyes.

According to the World Health Organization, UV levels are increasing because the ozone layer is decreasing. Now, in many parts of the world, including Australia, New Zealand, and the United States, UV health problems develop sooner and faster.

Always look for sunglasses that offer 100% protection from UVA and UVB rays. These provide the maximum protection for your eyes, and keep you looking stylish. Generally speaking, the cheaper the sunglasses, the less likely that they are offering protection from UV light. When you consider the cost of surgery for cataracts and other damages to the eye, a good pair of sunglasses are well worth the nominal additional cost.

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