Color blindness is usually genetic. The red/green and blue color blindness is usually passed down from the parents, the gene responsible for this is carried on the X chromosome. The vast majority inherited their condition from their mother who is normally a 'carrier' but not color blind herself.

What is the cause of Daltonism?

Color blindness can also happen if your eyes or the part of your brain that helps you see color gets damaged. This can be caused by: Eye diseases, like glaucoma or macular degeneration. Brain and nervous system diseases, like Alzheimer's or multiple sclerosis.

Where do you get colorblindness from?

Colour blindness is a usually a genetic (hereditary) condition (you are born with it). Red/green and blue colour blindness is usually passed down from your parents. The gene which is responsible for the condition is carried on the X chromosome and this is the reason why many more men are affected than women.