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How You Can Decide Whether You Should You Really Spend That Much on Sunglasses


Do you ever reach for your sunglasses before you move from your darkened house to the bright, clear day outside? Only on the day you have to purchase a new pair of shades do you think about exactly what you want perched atop your nose. You think about the technical and aesthetic differences. And then as you near the sunglasses store, you wonder if the $200 Serengeti pair really work better than the $10 pair you just tried on at the flea market.

Let us take the mystery out of sunglasses and help you look for what you want. We'll consider styles as well as what technology has done to improve lens composition. We'll also examine how light works and show you why light can actually make the sunglasses essential. The complexity and sophistication of a simple pair of dark glasses may well amaze you.

How do you pick your sunglasses?

Do you choose based on price, style, color, or name brand? The two pieces of tinted glass or plastic set in a plastic or metal frame might seem like a simple design at first, but scientists have found a way to manipulate these two pieces of glass or plastic to literally effect the user's eyesight once he slides them on. Differences between sunglasses really do exist.

What your sunglasses can do for you

Sunglasses should protect your eyes from ultraviolet rays in sunlight. Ultraviolet, or UV, light damages the cornea and retina. A great pair of sunglasses will eradicate the UV rays. Your glasses do not have to be ugly to provide great UV protection, most companies already include this as part of their glasses, even the inexpensive brands.

Sunglasses protect your eyes from intense light. Naturally a person's iris closes when the eye receives too much light. After the eye has closed the iris as far as possible, the eyelids will instinctively squint to prevent too much light from entering the eye. If squinting does not deter the light enough, like when sunlight reflects off the snow, the excess light will damage the retina. A great pair of sunglasses will block light entering the eyes as much as 97 percent and thus help the user avoid permanent retina damage.

Sunglasses protect eyes from glare. Reflective surfaces, like water, can reflect intense amounts of light, and bright spots will camouflage or hide objects. Good sunglasses will eliminate the glare with the use of polarization, which you can read about later in this article.

Sunglasses get rid of specific frequencies of light. Some frequencies of light will blur vision while others will enhance contrast. The right color of sunglasses will actually affect the frequencies and allow them to work better in a given situation.

The next time you consider buying a cheap pair of sunglasses, think about the entire purpose for them. You can actually damage your eyes with your tightwad tendencies. Sure, the cheap glasses will save you money, but in the end, you risk your eyesight.

 


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