Deficiencies:
The major concept of color vision deficiency is the inability to see all and/or certain colors. This is due to the loss of function of certain cone systems in the eye. (Vorvick, Lusby & Zieve, 2011) This visual deficiency has several aspects that distinguish the certain type a person may have. The different types of color vision deficiency are: monochromacy, dichromacy, and trichromacy. (Birch, 2013) Monochromacy is characterized by having a complete lack of color vision. The individual affected can only see shades of black and white. Monochromacy is present when lacking two or three cone pigments. Monochromacy is significantly rare and is consisted of two different types: rod monochromacy and cone monochromacy. Individuals with dichromacy only have two types of cone cells. Dichromatic individuals can match colors with only two wavelengths of spectral light, in contrast to the three a person without color vision deficiency needs. The separate types of color deficiencies within dichromacy are: protanopia, deuteranopia, and tritanopia. (Wynbrandt & Ludman, 2008) Anomalous trichromacy is evident when one cone (out of the three) is mutated, making it out of alignment, therefore giving three types of effects produced when seeing. What the individual sees depends on where the alteration is on the certain cone. The different conditions within trichromacy are: protanomaly, deuteranomaly, and tritanomaly. Both protanomaly and deuteranomaly are known as red-green color blindness. Red-green color blindness is the most prominent form of color vision deficiency in individuals. Tritanomaly isn’t as common in people, as it is a rare condition. (Simunovic, 2010) |