Dichromacy
Dichromacy
Dichromacy (pronounced: dye-kro-muh-see) is a type of color blindness where a person can only perceive two of the three primary colors. It is derived from the Greek words "di" meaning two, and "chroma" meaning color.
Types of Dichromacy
There are three types of dichromacy:
- Protanopia (pronounced: pro-tuh-noh-pee-uh): This is a type of dichromacy where the individual has a red-green color blindness and cannot perceive red light.
- Deuteranopia (pronounced: doo-tuh-ruh-noh-pee-uh): This is a type of dichromacy where the individual has a red-green color blindness and cannot perceive green light.
- Tritanopia (pronounced: try-tuh-noh-pee-uh): This is a type of dichromacy where the individual has a blue-yellow color blindness and cannot perceive blue light.
Causes
Dichromacy is usually caused by a genetic mutation that affects the cone cells in the retina. It can also be acquired as a result of a disease or injury to the eye or brain.
Diagnosis
Dichromacy can be diagnosed using a variety of tests, including the Ishihara Test, the Farnsworth-Munsell 100 Hue Test, and the Anomaloscope.
Treatment
There is currently no cure for dichromacy. However, there are tools and strategies that can help individuals manage their condition, such as using special color filters or learning to rely more on cues other than color.
See Also
External links
- Medical encyclopedia article on Dichromacy
- Wikipedia's article - Dichromacy
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