Color vision defects
Color Vision Defects
Color vision defects (pronunciation: /ˈkʌlər ˈvɪʒən dɪˈfɛkts/), also known as Color blindness, is a condition that affects an individual's ability to perceive or distinguish certain colors. This condition can be inherited or acquired due to certain diseases or injuries to the eye.
Etymology
The term "color vision defects" is derived from the English words "color" (from the Latin color), "vision" (from the Latin visio), and "defects" (from the Latin defectus).
Types of Color Vision Defects
There are several types of color vision defects, including:
- Monochromacy: This is a rare condition where an individual can only see in black and white.
- Dichromacy: Individuals with this condition have difficulty distinguishing between certain colors.
- Anomalous Trichromacy: This is a milder form of color vision defect where an individual has difficulty distinguishing between certain shades of colors.
Causes
Color vision defects can be caused by:
- Genetics: Most cases of color vision defects are inherited and are present at birth.
- Diseases: Certain diseases, such as diabetes and multiple sclerosis, can cause color vision defects.
- Medications: Some medications can also cause color vision defects.
Related Terms
- Ishihara Test: A test used to diagnose color vision defects.
- Photoreceptor Cell: The cells in the retina of the eye that detect light and color.
- Cone Cell: One of the types of photoreceptor cells that are responsible for color vision.
External links
- Medical encyclopedia article on Color vision defects
- Wikipedia's article - Color vision defects
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