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  2. Color blindness - Wikipedia

    en.wikipedia.org/wiki/Color_blindness

    The cause of blue–yellow color blindness is not analogous to the cause of red–green color blindness, i.e. the peak sensitivity of the S-opsin does not shift to longer wavelengths. Rather, there are 6 known point mutations of OPN1SW that degrade the performance of the S-cones. [46] The OPN1SW gene is almost invariant in the human population.

  3. Blue-cone monochromacy - Wikipedia

    en.wikipedia.org/wiki/Blue-cone_monochromacy

    Blue cone monochromacy (BCM) is an inherited eye disease that causes severe color blindness, poor visual acuity, nystagmus, hemeralopia, and photophobia due to the absence of functional red (L) and green (M) cone photoreceptor cells in the retina. BCM is a recessive X-linked disease and almost exclusively affects XY karyotypes.

  4. Achromatopsia - Wikipedia

    en.wikipedia.org/wiki/Achromatopsia

    Achromatopsia, also known as rod monochromacy, is a medical syndrome that exhibits symptoms relating to five conditions, most notably monochromacy.Historically, the name referred to monochromacy in general, but now typically refers only to an autosomal recessive congenital color vision condition.

  5. Congenital red–green color blindness - Wikipedia

    en.wikipedia.org/wiki/Congenital_red–green...

    Those with normal color vision should be able to see a green "74" on an orange background. Those with red–green color blindness may see the number "21" or no number at all, with the green and red hues appearing much more similar, if not indistinguishable. Specialty: Ophthalmology: Symptoms: Reduced color distinction along red-green axis ...

  6. Waardenburg syndrome - Wikipedia

    en.wikipedia.org/wiki/Waardenburg_syndrome

    [5] [8] Types 1 and 2 are by far the most common, with type 1 appearing to be slightly more common. [ 30 ] [ 31 ] In a 2015 review looking at 417 patients, type 1 was found to be the most common type, encompassing around half of all cases (47%), while type 2 was the second-most common type, encompassing around a third (33%). [ 8 ]

  7. Dichromacy - Wikipedia

    en.wikipedia.org/wiki/Dichromacy

    Colors of confusion include blue/purple and green/yellow. [2] Deuteranopia is a severe form of red-green color blindness, in which the M-cone is absent. It is sex-linked and affects about 1% of males. Color vision is very similar to protanopia. [2] Tritanopia is a severe form of blue-yellow color blindness, in which the S-cone is absent. It is ...

  8. What colors can cats see? Here's how your pet perceives the ...

    www.aol.com/colors-cats-see-heres-pet-110109011.html

    From velvety purples to fiery reds, many people can see a spectrum of vivid colors via the human eye. Others, however, may have limited hue perception due to certain conditions.

  9. Monochromacy - Wikipedia

    en.wikipedia.org/wiki/Monochromacy

    According to Jay Neitz, a color vision researcher at the University of Washington, each of the three standard color-detecting cones in the retina of trichromats can detect approximately 100 gradations of color. The brain can process the combinations of these three values so that the average human can distinguish about one million colors. [8]