Color blindness is an often misunderstood condition. Many assume because of its name that “color blind” means a person can only see in black and white. In actuality, the vast majority of people with color blindness do see color, but they see a much narrower range of color. It is estimated that a person with normal color vision can see up to 1 million distinct shades of color, but a person who is color blind may see as few as just 10 thousand colors (1% of the normal range).
Images that simulate color blindness, like the ones in this blog, can give an impression to people with normal color vision what it might be like to see the world through the eyes of a color blind person, however these simulations actually fail to give a realistic understanding of the actual first person experience.
So, what are the actual effects of color blindness on vision? The primary symptom that color blind people experience is color confusion. Put simply, color confusion is when someone mistakenly identifies a color, for example calling something orange when it is actually green.