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2. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   The add segment of the lens for near vision is the D-shaped area. A bifocal is a lens with two sections, separated by a line (see image to the right). Generally, the upper part of the lens is used for distance vision, while the lower segment is used for near vision. The area of the lens that caters to near vision is called the add segment.

3. Anti-scratch coating - Wikipedia

   en.wikipedia.org/wiki/Anti-scratch_coating

   Scratch-resistant coatings are added to glasses due to scratches' extreme ability to impact a wearer's vision. Even when optical glasses are made of high scratch-resistances glass, polycarbonate, or CR-39, coatings are still used. Optical coatings include diamond-like carbon (DLC) and anti-reflective-scratch hybrid coatings. Diamond-like Carbon ...

4. Anti-reflective coating - Wikipedia

   en.wikipedia.org/wiki/Anti-reflective_coating

   Uncoated glasses lens (top) versus lens with anti-reflective coating. The reflection from the coated lens is tinted because the coating works better at some wavelengths than others. An antireflective , antiglare or anti-reflection ( AR ) coating is a type of optical coating applied to the surface of lenses , other optical elements, and ...

5. Drew Barrymore has a line of blue light glasses at Walmart - AOL

   www.aol.com/lifestyle/2020-03-23-drew-barrymore...

   Drew Barrymore's FLOWER Eyewear line now includes seven styles of blue light-blocking glasses that are only $20, and you can shop them at Walmart.

6. Lowes, Walmart, Staples selling eclipse glasses ahead of ...

   www.aol.com/lowes-walmart-staples-selling...

   If you're looking for solar eclipse glasses in bulk, Staples offers 50 glasses for $99.99 for online ordering and pick up at one of four locations on the Treasure Coast. Walmart

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9. Color blind glasses - Wikipedia

   en.wikipedia.org/wiki/Color_blind_glasses

   Glasses with a notch filter (e.g. EnChroma glasses) filter a narrow band of light around 590 nm that excites both the L- and M-cones (yellow-green wavelengths). [12] They are often combined with an additional stopband in the short wavelength (blue) region to minimize the tint on the lenses and approximate a neutral-density filter. They improve ...