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These safety sunglasses have a scratch resistant coating, block 99.9% UV, and meet ANSI Z87.1 and CSA Z94.3 standards. The only way to assess the protection of sunglasses is to have the lenses measured, either by the manufacturer or by a properly equipped optician.
For the same reason sunglasses and filters were used by the American Army, especially for aviation, indeed Polaroid glasses were thought to protect aviator from sunlight but also atomic bomb explosions. [8] Cool-Ray was a division of American Optical for the sunglasses. It was the originator of the polarized sunglass as it is known today.
Safety glasses or spectacles, although often used as a catch-all term for all types of eye protection, specifically revers to protective equipment that closely resembles common eye wear. To meet most national standards, spectacles must include side shields to reduce the ability of debris to get behind the lenses from the side.
The APEL also includes different styles to accommodate soldier preferences, with the goal of increasing the use of eye protection. Approved protective eyewear includes both military standard and commercial styles. [3] Soldiers serve in different situations with different types of risk for eye injury, from ballistic projectiles.
They come with come with premium optical film filters and are designed to filter out 100% of UV and infrared light, and and 99% of intense visible light that can be harmful to your eyes. $23 at Amazon
Polarizing sheets are used in liquid-crystal displays, optical microscopes and sunglasses.Since Polaroid sheet is dichroic, it will absorb impinging light of one plane of polarization, so sunglasses will reduce the partially polarized light reflected from level surfaces such as windows and sheets of water, for example.
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