What is Dichromats?
People with dichromacy are called dichromats. Color loss occurs when the person is missing one of the three cone systems, resulting in a reduced ability to see that color. Protanopia results in the disappearance of long-wavelength pigment (red), so they see a predominance of blue and yellow. The medium wavelength (green) disappears as a result of deuteranopia. The short wavelength (blue) disappears as a result of tritanopia.
Dichromacy is the condition of the eyes with two types of functional photoreceptors, called cone cells. Dichromats can match any color observed by mixing more than two pure spectral lights. Dichromacy in humans is color blindness, in which one of the three basic cone cells is absent or not functioning. This defect occurs when one of the cone pigments is missing and the color is reduced to two dimensions.
There are three types of dichromacy, representing the loss of the L, M, or S cone function. In dichromatism, when only two cone types are functional, and monochromacy (monochromatism), when none or only one type of cone receptor is functional. Dicotyledons are usually unable to differentiate between red and green.