Medical Definition of Red-green colorblindness
Red - Green CB peeps have one of the three types of cone in the eye dysfunctional, IIRC due to a malformed protein
Red-green colorblindness: A form of colorblindness in which red and green are perceived as identical. This is the most common type of colorblindness. It is inherited in an X-linked recessive manner and affects 6% of males. It is also known as deutan colorblindness, deuteranopia, and Daltonism.
Red - Green CB peeps have one of the three types of cone in the eye dysfunctional, IIRC due to a malformed protein