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What (who) is color vision - definition
Color vision
![spectral locus]], with wavelengths shown in nanometers. Note that the colors in this file are specified in Adobe RGB. Areas outside the triangle cannot be accurately rendered because they are out of the gamut of Adobe RGB, therefore they have been interpreted. Note that the colors depicted depend on the color space of the device you use to view the image (number of colors on your monitor, etc.), and may not be a strictly accurate representation of the color at a particular position.](https://commons.wikimedia.org/wiki/Special:FilePath/CIE chromaticity diagram 2012 version.png?width=200 "spectral locus]], with wavelengths shown in nanometers. Note that the colors in this file are specified in Adobe RGB. Areas outside the triangle cannot be accurately rendered because they are out of the gamut of Adobe RGB, therefore they have been interpreted. Note that the colors depicted depend on the color space of the device you use to view the image (number of colors on your monitor, etc.), and may not be a strictly accurate representation of the color at a particular position.")
![[[Photopic]] relative brightness sensitivity of the human visual system as a function of wavelength ([[luminosity function]])](https://commons.wikimedia.org/wiki/Special:FilePath/Eyesensitivity.svg?width=200 "[[Photopic]] relative brightness sensitivity of the human visual system as a function of wavelength ([[luminosity function]])")
![Visual pathways in the human brain. The [[ventral stream]] (purple) is important in color recognition. The [[dorsal stream]] (green) is also shown. They originate from a common source in the [[visual cortex]].](https://commons.wikimedia.org/wiki/Special:FilePath/Ventral-dorsal streams.svg?width=200 "Visual pathways in the human brain. The [[ventral stream]] (purple) is important in color recognition. The [[dorsal stream]] (green) is also shown. They originate from a common source in the [[visual cortex]].")
ABILITY OF AN ORGANISM OR MACHINE TO DISTINGUISH OBJECTS BASED ON WAVELENGTHS OF LIGHT
Color perception; Colour vision; Colour perception; Color legibility; Color Vision; Sense of colour; Perception of color
Color vision, a feature of visual perception, is an ability to perceive differences between light composed of different wavelengths (i.e.
Evolution of color vision
ORIGIN AND VARIATION OF COLOUR VISION ACROSS VARIOUS LINEAGES THROUGH GEOLOGIC TIME
Color Vision Evolution; Evolution of colour vision
Color vision, a proximate adaptation of the vision sensory modality, allows for the discrimination of light based on its wavelength components.
Evolution of color vision in primates
.jpg?width=200 "Simulation of trichromatic (above) and dichromatic (below) perception of red and green apples")
LOSS AND REGAIN OF COLOUR VISION DURING THE EVOLUTION OF PRIMATES
Primate Color Vision Evolution; Evolution of colour vision in primates; Evolution of human colour vision; Draft:Evolution of Human Colour Vision; Draft:Evolution of human colour vision
The evolution of color vision in primates is highly unusual compared to most eutherian mammals. A remote vertebrate ancestor of primates possessed tetrachromacy, but nocturnal, warm-blooded, mammalian ancestors lost two of four cones in the retina at the time of dinosaurs.
Examples of use of color vision
1. "It opens up huge doors to understanding how color vision evolved and where it can go," said Brian C.
2. Verrelli, an evolutionary geneticist who studies color vision at Arizona State University and was not involved in the work, published today in the journal Science.
3. Scientists studying the evolution of color vision had identified the DNA mutation that gave rise to the third kind of cone cell.
4. The advance, which relied on imaginative tests to confirm that the mice can perceive all the hues that people see, helps resolve a long–standing debate about how color vision arose in human ancestors tens of millions of years ago.
5. The report released by the National Programme for Combating Blindness found that cataracts or color vision deficiency was the leading cause of blindness which affects more than one percent of Sudanese.