Color Blindness: This is a condition which reduces your ability to distinguish colors. This is very common disease with about 7 types. These include Protanopia, Protanomaly, Deuteranopia, Deuteranomaly, Tritanopia, Tritanomaly, and Monochromacy. The three that end with anomaly usually reduce the amount of color you see while the ones that end with nopia cannot see certain colors at all. Monochromacy is where people only see black and white with the exception of no color. This condition can be hereditary but may also be a random error. This cannot be cured but there is treatment to help.