Colour Vision Deficiency

A condition in which a person has difficulty distinguishing between certain colours due to differences in the cone cells of the retina. CVD affects approximately 1 in 12 men and 1 in 200 women worldwide. It is not typically a complete inability to see colour but rather a reduced ability to differentiate specific colour pairs. CVD creates significant accessibility barriers in digital design where colour is used to convey meaning, status, or categories without alternative visual cues.