On the Colour Blind Awareness site you can experience what it’s like to be colour blind. On the Vischeck site you can see what your images look like to someone who is colour blind. Roughly 1 in 20 people have some sort of colour vision deficiency.
How common is colour vision deficiency?
Roughly 1 in 20 people have some sort of colour vision deficiency.
Red-green colour vision defects are the most common form of colour vision deficiency. This condition affects males much more often than females. Among populations with Northern European ancestry, it occurs in about 1 in 12 males and 1 in 200 females. Red-green colour vision defects have a lower incidence in almost all other populations studied.
Blue-yellow colour vision defects affect males and females equally. This condition occurs in fewer than 1 in 10,000 people worldwide.
Blue cone monochromacy is rarer than the other forms of colour vision deficiency, affecting about 1 in 100,000 people worldwide. Like red-green colour vision defects, blue cone monochromacy affects males much more often than females.