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  2. Duochrome test - Wikipedia

    en.wikipedia.org/wiki/Duochrome_test

    The patient is asked to compare the clarity of the letters on the green and the red side. If the letters of the green side are clearer +0.25 D sphere is added and if the letters on the red side are clearer -0.25 D sphere is added. With optimal spherical correction, the letters on the red and green halves of the chart appear equally clear.

  3. Cathode-ray tube - Wikipedia

    en.wikipedia.org/wiki/Cathode-ray_tube

    Colored lenses or glycol are used for improving color reproduction at the cost of brightness, and are only used on red and green CRTs. [ 469 ] [ 470 ] Each CRT has its own glycol, which has access to an air bubble to allow the glycol to shrink and expand as it cools and warms.

  4. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  5. Cone cell - Wikipedia

    en.wikipedia.org/wiki/Cone_cell

    Cones function best in relatively bright light, called the photopic region, as opposed to rod cells, which work better in dim light, or the scotopic region. Cone cells are densely packed in the fovea centralis , a 0.3 mm diameter rod-free area with very thin, densely packed cones which quickly reduce in number towards the periphery of the retina.

  6. Color blindness - Wikipedia

    en.wikipedia.org/wiki/Color_blindness

    There are three kinds of lenses that an individual can wear that can increase their accuracy in some color related tasks (although none of these will "fix" color blindness or grant the wearer normal color vision): A red-tint contact lens worn over the non-dominant eye will leverage binocular disparity to improve discrimination of some colors ...

  7. Ivanka Trump suspected of wearing colored contacts

    www.aol.com/lifestyle/2017-04-11-ivanka-trump...

    Apparently, some have observed that Ivanka's eyes change color. Scovell noted that in May 2016, her eyes appeared to be brown in a CBS interview; in an August FOX News interview, they appeared ...

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