Doctor insights on:
How Can I Tell If Sunglasses Have Uv Protection
Sunglasses & UV: The best sunglasses should block 99% to 100% of uva & uvb radiation. Always check the label before you buy. Labels that say “uv absorption up to 400 nm” or “meets ansi uv requirements” mean the glasses block at least 99% of uv rays. Those labeled “cosmetic” block about 70% of uv rays. If there is no label, don’t assume the sunglasses provide any uv protection. Dark "sunglasses" may not block uv. ...Read more
Optometry: what are polarized sunglasses and is it the same or better than a 100% uv protection sunglasses?
Can sunglasses be bad for my eyes? Is it better to have darker-colored lenses or higher uv protection (or both)? I heard that darker sunglasses cause the pupil to dilate more, which makes your eyes more vulnerable to uv rays. Is this true? Should i get li
Ultraviolet : Ultraviolet (uv) light is harmful to the eyes, especially large amounts over long periods of time. In the United States, all sunglasses are required to block a very large percentage of the uv rays. The darkness of the sunglasses does not affect the uv filtering ability, since uv light is invisible and the uv blockers are clear. It is true that darker the sunglasses will open the pupil more and thus let in more uv light, but since almost all of it is being filtered by the sunglasses, this is not something to worry about. The exception would be specific eye diseases such as retinitis pigmentosa, in which extra high uv protection is a good idea. ...Read moreSee 1 more doctor answer
Sun light is very good for one's mood. Are people wearing glasses (with UV filters) (not sunglasses) more susceptible to (mental) illness?
UV not key to mood: Those who experience low mood when days are shorter in fall & winter may benefit from a dose of bright, early morning light. However, UV light is not essential to this treatment. The bright lights sold to treat mood in this way give off no UV light. You can purchase these lights easily, e.g. on Amazon, for less than $100. Used for 30 minutes in the morning, they may raise winter mood. ...Read moreSee 2 more doctor answers
Can the sun damage your eyes when they're closed? Let's say you're lying out in the sun and your eyes are closed with no sunglasses. Are your eye lids enough to protect your eyes from the sun's harmful uv rays? Or is it necessary to put sunscreen on your
Is it possible for UV rays to hurt your eyes through a vehicle windshield? Light reflected off of water on road, no sunglasses, sore eyes.
All new cars have UV: protection in the past 10 years. So you need to look up the make and model of your vehicle to find out. If so you should be protected. Most prescription glasses, you can buy the UV protective shield. It will fade over time. Always a good idea to protect your eyes in snow, water, or wherever there's high reflectivity of sun rays, even in pools! Avoid sunburn for skin, and protect your eyes too! ...Read more
They make sunglasses that block ultraviolet rays. Would you buy a screen to tan under that blocked ultra?
No: If such a screen really blocks all the ultraviolet then you wouldn't tan! tanning is a reaction of your skin to the damage that ultraviolet radiation causes. The cells of the skin put up little screens that try to shield the nucleus from further injury. Around 20 minutes of sun exposure a day can make your vitamin d ration. Otherwise, try to limit your exposure. ...Read more
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