noun. A form of colorblindness characterized by insensitivity to green.

noun. In psychophysics, a form of red-green colorblindness; the so-called green-blindness.

noun. A form of color blindness. Involves a defect in distinguishing between red and green.

noun. dichromacy characterized by a lowered sensitivity to green light resulting in an inability to distinguish green and purplish-red

"The regular color blindness tests (Ishikawa plates) test primarily for red-green (protanopia and deuteranopia), and not for tritanopia."

protanopia  tritanopia  

red-green color blindness  red-green colour blindness  red-green dichromacy