Types and symptoms of colour vision deficiency

Most peoplewithcolour vision deficiency have difficulty distinguishing between shades of red, yellow and green.

This is known as "red-green" colour vision deficiency.It's a common problem that affects around 1 in 12 men and 1in 200 women.

Someone with this type of colour vision deficiency may:

  • find it hard to tell the difference betweenreds, oranges, yellows, browns and greens
  • see these colours asmuch duller than they would appearto someone with normal vision
  • have trouble distinguishing between shades ofpurple
  • confuse reds with black

In rare cases, some peoplehave trouble with blues, greens and yellows instead. This is known as "blue-yellow" colour vision deficiency.

Content supplied by the NHS Website

Medically Reviewed by a doctor on 21 Dec 2018