By: Emma Nelson
What is color blindness?
Color blindness is the decreased ability or inability, to see color or perceive color differences under normal lighting conditions. Color blindness does not mean you are actually blind.
History of color blindness
How does occur?
Color blindness is caused because of an abnormal photopigment. When there are defects in the genes that create the photopigments, it creates a different photopigment which then means you will have color blindness. Most of the time, color blindness is passed down. It is passed down by the X-linked recessive pattern. Also, it can only be passed down by the mother. Males cannot pass down color blindness. Other times color blindness can be caused because of a past disease. For example, cataracts can cause a decline of color you are able to see. The picture on the left shows how it is passed down from the mother and father. Males are more likely to get color blindness, 1 out of 12 males have color blindness and 1 out of 200 women have color blindness.
What kinds of Color blindness are there?
Tritanomaly is where you are unable to perceive blue, and is extremely rare.
1. Tritanopes color confusions
- light blues with grey
- dark purples with black
- mid-greens with blues
- oranges with reds
Deuteranomaly is where you are unable to perceive green light and is the most common.
2. Deuteranopes color confusions
- mid-reds with mid-greens
- blue-greens with grey and mid-pinks
- pale pinks with light grey
- mid-reds with mid-brown
- light with lilac
3. Protanopes color confusions
- black with shades of red
- dark brown with dark green, dark orange and dark red
- some blues with some reds, purple and dark pinks
- mid-greens with some oranges