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  2. Color blind glasses - Wikipedia

    en.wikipedia.org/wiki/Color_blind_glasses

    The lenses may be eyeglasses, contact lenses or handheld lenses, but are divided in this article according to their working principle. Most lenses are intended for red-green color blindness , though some lenses are also marketed for blue-yellow color blindness.

  3. Contact lens - Wikipedia

    en.wikipedia.org/wiki/Contact_lens

    Contact lens. A pair of contact lenses, positioned with the concave side facing upward. Putting contacts in and taking them out. One-day disposable contact lenses with blue handling tint in blister-pack packaging. Contact lenses, or simply contacts, are thin lenses placed directly on the surface of the eyes. Contact lenses are ocular prosthetic ...

  4. Variations in traffic light operation - Wikipedia

    en.wikipedia.org/wiki/Variations_in_traffic...

    Arlington County, Virginia used the classic five-light "doghouse" (1971) with steady green and yellow arrows on the left, and green and yellow balls on the right, topped by a red ball. The light sequence started with a green arrow, proceeding to a yellow arrow, then a green ball, yellow ball, and finishing with a red ball.

  5. 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 ...

  6. Why Were Jeffrey Dahmer’s Eyes Yellow? Explaining His ... - AOL

    www.aol.com/lifestyle/why-were-jeffrey-dahmer...

    Throughout his time as a teen living with parents Lionel and Joyce Dahmer up until his trial in 1992, Dahmer wore a pair of '70s-style aviator eyeglasses as well as bright yellow colored contacts ...

  7. Chicken eyeglasses - Wikipedia

    en.wikipedia.org/wiki/Chicken_eyeglasses

    Red-tinted lenses were considered effective in reducing internecine pecking because they disguise the color of blood. As summed up in a 1953 article in Indiana's National Road Traveler newspaper, "The deep rose-colored plastic lenses make it impossible for the cannibal [chicken] to see blood on the other chickens, although permitting it to see the grain on the ground."

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