Colour blindness describes a number of problems experienced in identifying different shades and colours. This can vary from an inability to distinguish between different shades of the same colour, through to an inability to see any colours at all.
Colour blindness is an inherited disorder. More men than women suffer from colour blindness.

Watch this video of someone describing what it is like to be colour blind.

There is no real treatment or cure for colour blindness, unless it is connected to some other eye disease.

Colour blindness only has a really detrimental effect on people who would like to follow professions requiring accurate eyesight, such as airline pilots or train drivers.

(Health24, September 2012)

Read more:
All about colour blindness