Hot answers tagged sunglasses
Polarized sunglasses, as with other type of sunglasses may not block enough UV to be considered safe. From WikiPedia: for adequate protection, experts recommend sunglasses that reflect or filter out 99-100% of UVA and UVB light, with wavelengths up to 400 nm. Sunglasses which meet this requirement are often labeled as "UV400. In other words, ...
Polarization and UV protection on sunglasses are two different things. While UV refers to light of a wavelength of approximately 10nm to 400nm, light of any wavelength can be polarized. So polarized sunglasses do not generally protect against UV, they also need a dedicated UV filter. Light emitted by the sun oscillates in all directions perpendicular to the ...
Those large sun glasses that are used after cataract surgery are great - stops 100% of all types of uv and completely covers your eyes. New $70, used $5 at charity store or just take your mums. Yes, you will look like an old person and they are breakable plastic, but for $5, buy 2.
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