Instead of the term "color blind" it is more accurate to use the term "color perception deficiency".
These conditions are mostly hereditary but can sometimes be acquired. Hereditary color perception deficiencies are mostly X chromosome-linked genetic conditions, hence more common in males.
Color perception disorders are seen in about one in every 12 males (8%) and in about one in every 250 females (0.4%).
There is no definitive treatment for color perception deficiency. It can be largely corrected with special contact lenses.
These conditions are mostly hereditary but can sometimes be acquired. Hereditary color perception deficiencies are mostly X chromosome-linked genetic conditions, hence more common in males.
Color perception disorders are seen in about one in every 12 males (8%) and in about one in every 250 females (0.4%).
There is no definitive treatment for color perception deficiency. It can be largely corrected with special contact lenses.
Total color blindness (Monochromacy)
It is the condition of not perceiving any color. There are other significant eye diseases, but they are very rare in the population.Severe partial color perception deficiency
It is the condition where one of the red, green, or blue colors is not perceived at all. (Dichromacy)Mild partial color perception deficiency
It is the condition where one of the three colors can be partially perceived. (Defective trichromacy)According to the wavelength of light not perceived in the color spectrum;
Red-green color blindness (8%)
Severe - (2%)- Protanopia
- Deuteranopia
- Protanomaly
- Deuteranomaly
Blue-yellow color blindness (rare)
- Severe - Tritanopia
- Mild - Tritanomaly
| Type | Occurrence Rate (%) | |
| Male | Female | |
| Protanomaly | 1 | 0.02 |
| Protanopia | 1 | 0.02 |
| Deuteranomaly | 5 | 0.4 |
| Deuteranopia | 1 | 0.01 |
| Tritanopia | 0.005 | 0.005 |
| Achromatopsia | 0.005 | 0.005 |