Tritanopia vs. Protanopia — What's the Difference?

A visual defect characterized by the inability to discern blue and yellow.

A form of colorblindness characterized by defective perception of red and confusion of red with green or bluish green.

A form of color blindness in which the retina is deficient in or lacks cone cells containing opsins that respond to the color blue, resulting in an inability to distinguish blue from green.

(pathology) A form of color blindness. Involves a defect in distinguishing between red and green.

Rare form of dichromacy characterized by a lowered sensitivity to blue light resulting in an inability to distinguish blue and yellow

Dichromacy characterized by lowered sensitivity to long wavelengths of light resulting in an inability to distinguish red and purplish blue