Judged: two independent readers; copy check clear.
red–green blindness
red–green blindness In this historical source, red–green blindness means the retinal zone outside the center of vision where sensitivity to red and green is absent, even though the innermost zone still detects color.
In this historical source, red–green blindness means the retinal zone outside the center of vision where sensitivity to red and green is absent, even though the innermost zone still detects color. It is described as part of the way color sensitivity changes from the center of the retina toward the periphery, before the farthest outer zone becomes completely color-blind.