A new survey is trying to look at the impact of colour-blindness on everyday life.
Colour blindness affects about one in 10 men and one in 200 women. That means it's 20 times more common in men.
People who are colour blind and people with normal eyesight are invited to join an online survey by University College London Medical School of the impact of being colour blind on quality of life. The survey is confidential and anonymous. It takes about 15 minutes, depending on how much you want to say. If you are interested, please click on this link: UCL colour blindness survey.