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  2. Do blue light glasses actually protect your eyes? Eye doctors ...

    www.aol.com/news/blue-light-glasses-actually...

    During the pandemic, the eye symptoms associated with prolonged screen use came into focus, as did speculation about blue light’s impact on the eyes. "Blue light is part of the natural, normal ...

  3. Eye color - Wikipedia

    en.wikipedia.org/wiki/Eye_color

    Eye color. Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye 's iris [1][2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. [3]: 9. In humans, the pigmentation of the iris varies from light brown to black, depending on the concentration of ...

  4. Impossible color - Wikipedia

    en.wikipedia.org/wiki/Impossible_color

    Impossible color. The human eye's red-to-green and blue-to-yellow values of each one-wavelength visible color [citation needed] Human color sensation is defined by the sensitivity curves (shown here normalized) of the three kinds of cone cells: respectively the short-, medium- and long-wavelength types. Impossible colors are colors that do not ...

  5. Color vision - Wikipedia

    en.wikipedia.org/wiki/Color_vision

    Color vision. Colorless, green, and red photographic filters as imaged by camera. Color vision, a feature of visual perception, is an ability to perceive differences between light composed of different frequencies independently of light intensity. Color perception is a part of the larger visual system and is mediated by a complex process ...

  6. How Tears Evaporate and Lead to Dry Eye - AOL

    www.aol.com/tears-evaporate-lead-dry-eye...

    Evaporative dry eye symptoms include: Awakening with a dry eye feeling. Eye irritation. Feeling like your eyelids are stuck to your eyeballs. Red eyes. The less common form of dry eye is aqueous ...

  7. If you think you have blue or green eyes, they're actually brown

    www.aol.com/lifestyle/2016-12-19-if-you-have...

    By Susana Victoria Perez, Buzz60 If you think you have blue eyes, think again, they are actually tricking you! All eyes are really brown. According to CNN, Dr. Gary Heiting, a licensed optometrist ...

  8. Entoptic phenomenon - Wikipedia

    en.wikipedia.org/wiki/Entoptic_phenomenon

    Entoptic phenomena (from Ancient Greek ἐντός (entós) 'within' and ὀπτικός (optikós) 'visual') are visual effects whose source is within the human eye itself. (Occasionally, these are called entopic phenomena, which is probably a typographical mistake.) In Helmholtz 's words: "Under suitable conditions light falling on the eye ...

  9. Heterochromia iridum - Wikipedia

    en.wikipedia.org/wiki/Heterochromia_iridum

    Heterochromia iridum. Heterochromia is a variation in coloration most often used to describe color differences of the iris, but can also be applied to color variation of hair [1] or skin. Heterochromia is determined by the production, delivery, and concentration of melanin (a pigment). It may be inherited, or caused by genetic mosaicism ...

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