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  2. Evolution of the eye - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_the_eye

    Vision itself relies on a basic biochemistry which is common to all eyes. However, how this biochemical toolkit is used to interpret an organism's environment varies widely: eyes have a wide range of structures and forms, all of which have evolved quite late relative to the underlying proteins and molecules. [24]

  3. Adaptation (eye) - Wikipedia

    en.wikipedia.org/wiki/Adaptation_(eye)

    Night vision is of lower quality than day vision because it is limited in resolution and colors cannot be discerned; only shades of gray are seen. [1] In order for humans to transition from day to night vision they must undergo a dark adaptation period of up to two hours [ 2 ] in which each eye adjusts from a high to a low luminescence "setting ...

  4. Evolution of color vision - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_color_vision

    Researchers studying the opsin genes responsible for color-vision pigments have long known that four photopigment opsins exist in birds, reptiles and teleost fish. [3] This indicates that the common ancestor of amphibians and amniotes (≈350 million years ago) had tetrachromatic vision — the ability to see four dimensions of color.

  5. Blindness in animals - Wikipedia

    en.wikipedia.org/wiki/Blindness_in_animals

    Mammals other than primates generally have less effective two-receptor color perception systems, allowing only dichromatic color vision; marine mammals have only a single cone type and are thus monochromats. Honey- and bumblebees have trichromatic color vision, which is insensitive to red but sensitive in ultraviolet to a color called bee purple.

  6. Gene-centered view of evolution - Wikipedia

    en.wikipedia.org/wiki/Gene-centered_view_of...

    The gene-centered view of evolution, gene's eye view, gene selection theory, or selfish gene theory holds that adaptive evolution occurs through the differential survival of competing genes, increasing the allele frequency of those alleles whose phenotypic trait effects successfully promote their own propagation.

  7. Yes, You Can Rent Out Your Eyeball For Money

    testkitchen.huffingtonpost.com/eyedynasty

    n November 1954, 29-year-old Sammy Davis Jr. was driving to Hollywood when a car crash left his eye mangled beyond repair. Doubting his potential as a one-eyed entertainer, the burgeoning performer sought a solution at the same venerable institution where other misfortunate starlets had gone to fill their vacant sockets: Mager & Gougelman, a family-owned business in New York City that has ...

  8. Evolution of color vision in primates - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_color_vision...

    The sense of smell may have been a contributing factor in selection of color vision. One controversial study suggests that the loss of olfactory receptor genes coincided with the evolved trait of full trichromatic vision; [24] this study has been challenged, and two of the authors retracted it. [25]

  9. AOL Mail - AOL Help

    help.aol.com/products/aol-webmail

    Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.