Difference Between Polarized Sunglasses & UV Protection Sunglasses

Did you know that every year 3.2 million people go blind from eye conditions caused by prolonged exposure to UV? People wear sunglasses for all sorts of reasons, but one integral role that shades pay is in protecting the eyes from harmful ultraviolet rays.

You have probably seen many sunglasses described as “polarized,” or offering a certain level of UV protection. But what do these phrases actually mean, and is there a difference between UV sunglasses and polarized glasses? 

UV protection protects your eyes from the dangerous rays of the sun while polarized sunglasses eliminate glare. Having ultraviolet protection is crucial while polarization is more of a preference. These two are similar and work the same way but offer different benefits. Polarized glasses do offer better image clarity but do not come with full UV protection.  

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Polarized Sunglasses 

How do polarized sunglasses work? 

Polarized lenses have a unique chemical film coating that is specifically designed to reduce glare from intense reflected light, which can interfere with vision. Glare is caused when light from the sun is reflected off of water or a solid surface. Have you ever noticed when you are out at the beach or lake, the glare reflecting off the water causes blurry vision? When light is reflected off of water or solid surfaces, the reflected light shines back at your eye and is magnified which results in a glare. 

What's the advantage of polarized sunglasses？

Polarized lenses filter the light that comes in from different angles and allow you view objects clearly. Without polarized protection, depth perception is reduced, distorted view and color perception occur, and in some cases, you could be temporarily blinded. Polarization is useful for many outdoor activities including driving, extreme sports, water sports, and fishing. Better yet, prescription polarized sunglasses are also an option for anyone who needs corrective eyewear. The biggest benefits of polarized lenses is that it can save your vision!

UV Protection Sunglasses 

Too much exposure from the sun’s UV rays has been linked to extensive eye damage. This can include cataracts, pingueculae, macular degeneration, and even sunburns on your cornea. Not only protecting your eyes from the sun, it’s important to wear sunglasses in the shade too as UV rays reflected from buildings and other surfaces are dangerous. 

Tips on Buying Sunglasses - The American Optometric Association Suggested

• 99 to 100 percent protection of UVA and UVB rays.
• Screen out 75 to 90 percent of visible light.
• Some contact lenses provide UV protection but they don’t cover your entire eye. Sunglasses are still needed.
• Look for lenses that are gray or brown for proper color recognition.
• Invest in wraparound-style frames because they limit sunlight to your eyes. 

What's the advantage of UV protection sunglasses？ 

Think of UV protection sunglasses and polarized eyeglasses as sunscreen. UV protection sunglasses are SPF 45 and polarized are SPF 15. Traditional UV lenses are designed to block ultraviolet rays and to reduce the overall brightness of the light reaching your eyes. UV protection lenses are usually sold with a stated level of protection, for example, “100% UVA/UVB protection” and, while this protection is important, traditional UV lenses do not typically reduce glare. 

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