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About: Dichromacy     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : umbel-rc:AilmentCondition, within Data Space : dbpedia.org associated with source document(s)

Type: ThingFuchs' dystrophypopulated placediseaseumbel-rc:AilmentCondition New Facet based on Instances of this Class

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. By comparison, trichromats need three primary colors, and tetrachromats need four. Likewise, every color in a dichromat's gamut can be evoked with monochromatic light. By comparison, every color in a trichromat's gamut can be evoked with a combination of monochromatic light and white light.