How to Check if Shades Have UV Protection? What is UV400?

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How to check of shades have uv protection?
The sun is pretty cool and all, but there are some not so good things you can say about the sun too. For example, the sun likes to give off UV rays. If you’re not wearing UV400 protection sunglasses, that’s a big, big problem.
“When shopping for shades, the most important thing to look for is the level of UV protection offered by the lens. The safest bet is to buy sunglasses that provide 100% UV protection, or UV 400 protection. That means that the glasses protect your eyes from both UVA and UVB radiation.”
Blog Post: bit.ly/2I4rx3r
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[@bozhidariliev9482]

Where exactly does this video actually show "How to Check if Shades Have UV Protection"? And I mean check, not read it on a sticker that any vendor can stick on them. I have 2 pairs of glasses that said "polarized" and both aren't.

[@rynlna6186]

Same thing, i was expecting this video to let us know how exactly but I don't think this video answers their own question. *Sad* deceiving title

[@rynlna6186]

You'll simply know that your sunglasses are polarized by trying to hold it infront of an on smartphone screen or Tv screen or whatever electronic screen. try to tilt the sunglasses left or rights slowly, if the view has some rainbows and slowly tilt it more and the view on the lens turns black. Then that's a polarized sunglasses

[@borsalinho]

Dear Sirs,
thenks for the video.May I ask if UV400 will absorb also UVC light below 280 nm wavelength or just above of 280 nm wavelength.
Thanks in advance!
Kind regards
Ales M.Sc mech. eng.

[@thegradient2086]

hey My police polarized sunglasses say S9229Ti/P C01/01 on its temple..and also MADE IN ITALY CE..
Does it offer UV protection?

[@barnaliroy2156]

Which one is better b/n uv 400 and uv 420 ? Please provide knowledge ...

[@runners4542]

UV 420 has an extra layer that protects your eyes from blue light i.e light from laptop and phone screens. Your life style should help you decide which is more suiting for you. If you spend more than 3hrs staring into a screen, you may need to get a UV420 glassses but if you're mostly outdoors, UV400 is enough.
Hope this helps

[@kickboxervikram8698]

I have sign of pinguecula in my eyes. What lens I need to protect from uv?

[@hassanelmaddani2980]

I see a black spot on my right eye, wherever I turn it turns with me , even on book when I read I see it on the bagel, some times I follow it with sewing, I became a sensitive to all kind of lights lamps,sunlight...etc. some doctor told me it's better to get used to it .
My question is Is this glasses UV400 is good to my condition?

[@runners4542]

Unfortunately we can't answer your question. Only a Doctor can recommend treatment. UV 400 glasses protect your eyes from sunlight and other UV sources, It may be helpful with light sensitivity but I'll recommend you see another Doctor (Optician) for a proper check on the eyes

[@hassanelmaddani2980]

@@runners4542 thank you

[@malikajmalkhan9720]

Dear, you may have eye floater.
Better visit an eye specialist.
I have the same thing for 8 years now...

[@WeiWei-ey4eg]

Thanks .....thanks

[@runners4542]

You’re welcome

[@hassanelmaddani2980]

@@runners4542 I see a black spot on my right eye, wherever I turn it turns with me , even on book when I read I see it on the bagel, some times I follow it with sewing, I became a sensitive to all kind of lights lamps,sunlight...etc. some doctor told me it's better to get used to it .
My question is Is this glasses UV400 is good to my condition?

[@alexwest5106]

Where was the answer to the question in the title?

[@ildafons]

You dont have to wear sunglasses to protect your eyes! But if you want to wear sunglasses as shades from bright sun you have to wear sunglasses with UV protection! This video is misleading.

[@heathermaitland2942]

Thanks for never actually answering the whole video topic question. Waste of time