With so many different types of sunglasses on the market today, it can be a daunting task to find the right pair to fit your unique style. Selecting stylish frames is good for your image, but picking the right lenses is crucial for your eye health.
Let’s assume you’ve already tried on a bunch of different styles of sunglasses and you finally found that perfect pair. They look good and feel good on your face, so you’re ready to purchase. Not so fast. When it comes to protecting your vision on bright, sunny days, the lenses you choose make all the difference.
Most sunglass lenses available today offer good protection from Ultraviolet (UV) rays. Long-term exposure to UV rays can be damaging to the eyes and have been linked to several eye diseases including cataracts, macular degeneration and cancer. There are two types of UV rays- UVA and UVB. UVB rays are the most dangerous to skin and eyes, however UVA rays that are absorbed into the eye can also contribute to vision problems. Since there is no easy way to tell what types of rays you are being exposed to outside, it’s important to choose sunglass lenses that offer both UVA and UVB protection.
UV coatings are pretty common, but there are other lens coatings available that you should know about. Lenses can be tinted with different colors like yellow, brown or rose that can brighten or darken the outdoor environment. Mirror coatings that completely hide the wearer’s eyes are also an option. But of all these choices, polarized lenses offer the best protection for preventing exposure to UV rays and damaging sun glare.
Polarization is a great feature if you enjoy water or snow sports or have sensitive eyes. When light reflects off of flat surfaces, such as water or snow, the light waves align in horizontal patterns, creating intense glare. The filters in polarized lenses block these horizontal light waves, substantially reducing blinding glare and eyestrain.
The American Academy of Ophthalmology advocates wearing sunglasses anytime you’re outdoors, especially when it’s summer, you’re near water or snow on sunny days, or you’re outside at high elevations. In addition, if you have an eye disease, have had cataract surgery, or take photosensitizing drugs, you should wear sunglasses whenever you go outside.
Polarized lenses do cost a bit more than regular UV lenses, but the protection they offer more than makes up for the additional cost. A cheap pair of sunglasses with UV protection can be used on days when the sun isn’t very strong, but for regular outdoor activity, especially when you’re around open water or snow on sunny days, polarized lenses are well worth the investment to protect your vision.
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