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Specialty. Ophthalmology. Dichromacy (from Greek di, meaning "two" and chromo, meaning "color") is the state of having two types of functioning photoreceptors, called cone cells, in the eyes. Organisms with dichromacy are called dichromats. Dichromats require only two primary colors to be able to represent their visible gamut.
Carotenosis is a benign and reversible medical condition where an excess of dietary carotenoids results in orange discoloration of the outermost skin layer. The discoloration is most easily observed in light-skinned people and may be mistaken for jaundice. [ 1][ 2]: 540 [ 3]: 681 Carotenoids are lipid-soluble compounds that include alpha- and ...
Color blindness or color vision deficiency ( CVD) is the decreased ability to see color or differences in color. [ 2] The severity of color blindness ranges from mostly unnoticeable to full absence of color perception. Color blindness is usually an inherited problem or variation in the functionality of one or more of the three classes of cone ...
Despite their duller eyesight, dogs can be visually attracted to the content playing on a television screen. While we have three types of color-processing retinas in our eyes, dogs only have two ...
The post ‘Puppy-Dog Eyes’ Didn’t Evolve Just for Humans, Study Shows appeared first on DogTime. Pet parents would agree that it is hard to resist puppy-dog eyes. A recent study proved that ...
Albinism is the congenital absence of melanin in an animal or plant resulting in white hair, feathers, scales and skin and reddish pink or blue eyes. [ 1][ 2] Individuals with the condition are referred to as albinos . Varied use and interpretation of the terms mean that written reports of albinistic animals can be difficult to verify.
The worms are transmitted by infected flies, which pass them to animals and potentially humans by landing near their eyes and feeding on their tears, according to the CDC. In serious cases, they ...
Evolution of color vision in primates. Baboons, like other old world monkeys and apes, have eyes which can discern blue, green and red wavelengths of light. The evolution of color vision in primates is highly unusual compared to most eutherian mammals. A remote vertebrate ancestor of primates possessed tetrachromacy, [ 1] but nocturnal, warm ...