Green Cone Monochromacy

A hypothetical form of colorblindness where the individual sees in Monochromacy (grayscale) because only one class of cone is present (M-cone). This disease is an intersection of Tritanopia (missing the gene for the S-Opsin) and Protanopia (missing the gene for the L-Opsin).

While the prevalence of GCM should be the product of tritanopia and protanopia prevalence, there are no instances of this type of CVD presented in academic literature.