About Colour Blindness

Colour blindness is much more prevalent than many expect. It affects...

The most common form of colour blindness is deuteranomaly, which affects 5% of men.  Deuteranopes are less sensitive to green light. (M Cone)

Protanomaly is the next most common form of colour blindness, affecting approximately 1.3% of men. Protanopes are less sensitive to red light. (L Cone)

Less common, affecting 1% of men is pure protanopia. Protanopes lack long wavelength (L) cones. Similarly pure deuteranopia affects 1% of men, with deuteranopes lacking the medium wavelength (M) cones. They are unable to distinguish between green–yellow–red.

Blue–yellow color blindness is far less common and is extremely rare (About 1 in 30-50,000 people). The two main types are Tritanopia, where the short wavelength (S) cones are missing, and Tritanomaly, where the S cone response is shifted to the right. Both mean short wavelength colours (blue, indigo and violet) appear greenish and are drastically dimmed.

To find out more, we recommend visiting the ColourblindAwareness.org website.

Eyeteq currently supports Deuteranopia, Protanopia, Deuteranomaly, and Protanomaly.