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Sunglasses and Your Eyes

Sunglasses and Your Eyes

April 12, 2018

The Future’s So Bright, We Gotta Buy Shades


Aviators. Butterflies. Cat-Eyes. Rectangles, shields, squares, wraps and wayfarers. Regardless of which style catches your eye, the most important thing is to make sure your sunglasses will truly protect your eyes.

And what’s real protection all about? Ultraviolet light.

Live Science says, “Ultraviolet light is a type of electromagnetic radiation that makes black-light posters glow and is responsible for summer tans — and sunburns. However, too much exposure to UV radiation is damaging to living tissue.”

Especially the living tissue in your eyes.

Bad Mojo

Ultraviolet light can cause or worsen a lot of conditions. For example, it:

Pterygia are a lesser-known result of UV light exposure. According to, “Pterygia are benign (non-cancerous) growths, but they can permanently disfigure the eye. They also can cause discomfort and blurry vision.”

You’ll know a pterygium when you see one; it’s a yellow growth, often with blood vessels running through it, on the white parts of their eyes.

It’s also called “surfer’s eye,” but could just as well be called farmer’s eye, fisherman’s eye or construction worker’s eye. That’s because anyone who is out in the dust, sunshine and wind all the time is more at risk to develop them.

Find the Right Kind

The only real protection from UV rays is a good pair of sunglasses. So, what makes sunglasses good? What do you need to look for in your shades? 

Top to Bottom Protection

Sunglasses with polarization filters block light that’s reflected off of flats surfaces, like water, that generally are polarized horizontally. 

One of the best ways to understand polarization is to think of a white picket fence. If there’s sunlight shining from behind it, the only rays that come through are the vertical light rays. Everything else is cut.

Imagine a beam of light, which is like a tube, that has a clock dial with numbers from 1 to 12 on it, on its face. Polarized sunglasses only let the straight up and down, 12-o’clock to 6-o’clock, rays come through. Everything else is filtered out.

Backside anti-reflective coatings are important, too. When you’re wearing sunglasses and the light is coming from overhead, you can get light can reflect off the inside of the sunglasses back to your eyes. A good anti-reflective on the inside will prevent that from happening.

Color Us Protected

Different tints on sunglasses have advantages in specific conditions:

Universal lenses for all kinds of conditions have copper-colored tints.

If you’re in bright, bright sun, on a lake, or in the winter with the sunshine reflecting up from the ground, the best tints are dark grey.

Green tint is especially good for golf (and is, therefore, my favorite shade).

For more about tints and what outdoor activities they’re best for, check out “Your Guide to Sports Sunglass Lens Tints.”

For more information about UV light and protecting your eyes, check out these sources from the American Optometric Association:

And don’t forget, we’re in the midst of our annual sunglasses sale. Get a complete pair of prescription sunglasses at a 50 percent discount through Thursday, April 12!




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