Tritanopia is a rare form of “blue–yellow” color blindness. Despite the description, tritanopia does not make it difficult to tell the difference between blue and yellow but colors that contain blue or yellow. Difficulties lie between green–blue, yellow–pink and purple–red.

Tritanopia is a rare type of color blindness that alters how you see the colors blue and yellow. It is caused by the absence of S cone cells (short wavelength) in the retina and is typically the result of a gene mutation.

Tritan color blindness is a rare form of color vision deficiency that affects the ability to distinguish between blue and yellow colors. It is caused by a genetic mutation in the S-opsin gene, inherited in an autosomal recessive manner, and it is more common in men than women.