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Old 18-10-2010, 01:45 AM   #1
Choose the perfect pair of sunglasses
.BZU. .BZU. is offline 18-10-2010, 01:45 AM
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Sunglasses aren’t just fashion accessories anymore and most consumers today are aware about the dangers of sun exposure to eyes.

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The Ultra Violet (UV) radiation from the sun can damage not only the skin of your eyelids, but also the clear outer parts of the eye — the cornea and conjunctiva.
UV exposure also contributes to the development of certain types of cataracts. Individuals can protect their eyes by simply wearing sunglasses that block out 99 to 100 per cent of UV.
Such glasses protect the eye from both UVA-and the more harmful-UVB rays.
However, not all sunglasses block UV rays. According to a research conducted at Harvard University, “Tinted glasses without UV protection cause more harm than wearing no glasses at all. It is important to look for sun shades with the clear protector which blocks harmful ultraviolet light.”
And though sunglasses do make for interesting style accessories, it’s the quality of the glasses that should actually catch your eye. Here are some tips to help you pick out the perfect pair of sunglasses…
Look for UV protection:
Don’t be deceived by colour or cost. The ability to block UV light is not dependent on the darkness of the lens or the price tag. Always choose sunglasses that are labelled as blocking 99 to 100 per cent of UV rays. Some manufacturers’ labels read: ‘UV absorption up to 400nm’. This is indicates 100 per cent UV absorption.
Shape matters:
Wrap-around sunglasses offer added protection. Sunglasses that wrap around the temples prevent the sun’s rays from entering from the sides. Some studies have shown that enough UV rays enter around standard sunglass frames to reduce the protective benefits of the lenses.
Price tag:
Always purchase a pair of sunglasses from a reputed optician and not from roadside vendors. Opt for a good quality pair, even if it means shelling out more bucks. At the same time, don’t be misguided by price. Inspite of the high prices, check for all the above.
Check lenses for quality:
Look for a uniform tint, not darker in one area than in another. To check for imperfections in the lenses, hold the glasses at arm’s length and then look through them at a straight line in the distance, such as the edge of door. Slowly move the lens across the line. If the straight edge distorts, sways, curves or moves, the lens is flawed. Also UV-absorbing contact lenses should not be used as substitutes for sunglasses.

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