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  2. Sunglasses - Wikipedia

    en.wikipedia.org/wiki/Sunglasses

    Sunglasses can improve visual comfort and visual clarity by protecting the eye from glare. [24] The lenses of polarized sunglasses reduce glare reflected at some angles off shiny non-metallic surfaces, such as water. They allow wearers to see into water when only surface glare would otherwise be seen, and eliminate glare from a road surface ...

  3. Eye protection - Wikipedia

    en.wikipedia.org/wiki/Eye_protection

    There are many different types of eye protection against light suited for different applications. The most common forms of eye protection against light are sunglasses. These primarily protect against UV light from the sun and help increase visibility in bright conditions. They often tend to be fashionable as well as practical.

  4. Glasses - Wikipedia

    en.wikipedia.org/wiki/Glasses

    Typical sunglasses lenses are tinted for protection against bright light or polarized to remove glare; photochromic glasses are clear or lightly tinted in dark or indoor conditions, but turn into sunglasses when they come into contact with ultraviolet light. Most over-the-counter sunglasses do not have corrective power in the lenses; however ...

  5. Polarized and UV-protected sunglasses under $60

    www.aol.com/news/polarized-uv-protected...

    These Deja View sunglasses from Knockaround have a square shape, with the pointed top edges that all cat-eye sunglasses share. They’re polarized, offer UV400 sun protection, and they’re 144mm ...

  6. Ecamsule - Wikipedia

    en.wikipedia.org/wiki/Ecamsule

    Exposed to UV, ecamsule undergoes reversible photoisomerization, followed by photoexcitation. The absorbed UV is then released as thermal energy, without penetrating the skin. UVB rays cause short-term sunburn and skin cancer; UVA rays cause wrinkling and may have some role in development of skin cancer. There is no official rating for UVA ...

  7. Photochromism - Wikipedia

    en.wikipedia.org/wiki/Photochromism

    Hackmanite before (top) and after (bottom) exposure to UV. Tenebrescence, also known as reversible photochromism, is the ability of minerals to change color when exposed to light. The effect can be repeated indefinitely, but is destroyed by heating. [10] Tenebrescent minerals include hackmanite, spodumene and tugtupite.

  8. Optical coating - Wikipedia

    en.wikipedia.org/wiki/Optical_coating

    A woman wears sunglasses featuring a highly reflective optical coating Diagram of a dielectric mirror. Thin layers with a high refractive index n 1 are interleaved with thicker layers with a lower refractive index n 2. The path lengths l A and l B differ by exactly one wavelength, which leads to constructive interference.

  9. Polaroid Eyewear - Wikipedia

    en.wikipedia.org/wiki/Polaroid_Eyewear

    Polaroid Eyewear manufactures polarized sunglasses and polarized lenses, as well as optical frames, reading glasses, and clip-on lenses. Polaroid Eyewear was a part of the StyleMark group and sold to the Safilo Group in November 2011. Polaroid headquarters is located in Padua (Italy).

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