Protect Your Vision in the Sun
Date: August 25, 2011
Topic: Protect Your Vision in the Sun
This audio presentation provides information for all people-and especially people who already have eye problems-on how to protect their eyes from the ultraviolet light in sunshine.
Sarah DiSandro: Hi, I'm Sarah DiSandro and I work for the American Health Assistance Foundation .
Katherine Jimenez: and I'm Katherine Jimenez with BrightFocus. The BrightFocus Foundation is an international nonprofit organization dedicated to stopping age-related degenerative diseases. BrightFocus funds research on Alzheimer's disease, macular degeneration, and glaucoma. So far, BrightFocus has awarded more than $115 million dollars in research grants to fund cutting-edge science at universities, hospitals, and medical centers around the world.
Sarah DiSandro: Today, we are talking with Dr. Diane Bovenkamp, BrightFocus' Science Communications Specialist, about protecting your vision in the sun.
Katherine Jimenez: There really are misconceptions out there when it comes to sun safety.
Sarah DiSandro: Yes, there certainly are. Diane will help us learn more about this important topic.
Katherine Jimenez: What should we know about protecting our vision from the sun?
Dr. Diane Bovenkamp: Well everyone-and especially people who already have eye problems-should protect their eyes from the ultraviolet light in sunshine. UV light is what causes sunburn; but it also contributes to the formation of cataracts and to macular degeneration. Since the effects are cumulative, the more exposed your eyes are to UV rays, the higher the danger of damage to the cornea, retina, and lens. Unfortunately, the thinning of the Earth's ozone layer has reduced its function as a UV filter, so it is now more dangerous than ever to eyes (and skin) to spend unprotected hours in the sun. Luckily, proper eyewear can provide significant protection.
Dr. Diane Bovenkamp: So what should you have in your sunglasses? Wear high-quality sunglasses with a rating of 99- or 100-percent UV-A and UV-B protection. And please check the label when buying non-prescription lenses. If you aren't sure about the quality of your sunglasses, ask your optometrist or optician to check their protection level. If you purchase prescription lenses, be sure to ask about including protection (which can be tinted or be colorless) against UV radiation.
Sarah DiSandro: Why would someone do that instead of just purchasing prescription sunglasses?
Dr. Diane Bovenkamp: That is another option. But, it may be more affordable to consider adding UV protection to glasses you'll wear all the time. Contact lenses may provide some protection too, but only to the part of the eye they actually cover, so sunglasses should still be worn. If you want to tint your lenses, gray-colored lenses provide the most natural colors, while lenses tinted amber may boost your vision a bit by creating greater contrast. However, amber lenses can also make it harder to distinguish traffic-light colors, which may make gray lenses more desirable for some individuals. Large lenses are better than small ones, and wrap-around lenses are even better, since UV rays can enter the eyeball from the sides, above, and below.
Sarah DiSandro: Diane, how do I know if my lenses are the proper size?
Dr. Diane Bovenkamp: The lenses of your glasses shouldn't allow sunlight to reach your eye, so they should cover your entire eye.
Other options are polarized or mirrored lenses. While polarized lenses reduce glare, make sure they are coated to make them UV-protective as well. Mirrored lenses don't necessarily block UV light, so make sure they are marked as UV-protective.
Katherine Jimenez: Now Diane - should sunglasses only be worn on sunny days?
Dr. Diane Bovenkamp: It's best to wear your sunglasses as often as possible. An example of how important this is - clouds don't block ultraviolet light, so wear your sunglasses even on cloudy or overcast days. Eye protection is especially important at the beach or in the snow. Did you know water and sand reflect and thus increase the intensity of UV rays from 10 to 20 percent, while snow can reflect up to 80 percent? 40 percent of UV rays can be detected two feet below the surface of water, so be aware when you are swimming. Children and teens should wear sunglasses, too, especially since they may spend more time in the sun, and sun damage to eyes (and skin) is cumulative over time. Over three-quarters of our exposure to UV rays occurs before the age of 18.
Dr. Diane Bovenkamp: As for other protection to wear with sunglasses, wear a wide-brimmed hat as often as possible when you are outdoors. In addition to lowering your risk of eye diseases, hats can help shield your face and neck, where skin carcinomas can form, and don't forget your sun block! Finally, please protect your eyes while playing sports. Many sporting goods stores sell plastic shields or masks.
Sarah DiSandro: Thanks for talking to us today, Diane. I certainly learned some things that I didn't know.
Dr. Diane Bovenkamp: Thanks for inviting me.
Sarah DiSandro: Thanks everyone for listening. Check out our other eye health and Alzheimer's disease podcasts. If you have an idea for a future podcast, send it to firstname.lastname@example.org, that's communications at A-H-A-F dot O-R-G.
Katherine Jimenez: For more information about macular degeneration and glaucoma, visit our website brightfocus.org that is A-H-A-F dot O-R-G or call 1-800-437-2423.
Sarah DiSandro: Thanks again everyone.
Last Review: 08/30/13