Color blindness can go years without being identified. A child may use an unexpected color to paint an object, an adult may have difficulty interpreting a graph, or someone may discover the condition almost by chance. For those born with color blindness, there isn't necessarily a feeling of seeing "wrong," since that has always been their way of perceiving colors.
The condition is far from rare. According to the National Eye Institute (NEI), of the United States, approximately one in every 12 men has some type of color vision deficiency. The term color blindness encompasses different alterations in color perception and does not mean that all affected people see in the same way or see only in black and white.
