pro·ta·no·pi·a 
(prō′tə-nōpē-ə)
(prō′tə-nōpē-ə)n.
A form of colorblindness characterized by defective perception of red and confusion of red with green or bluish green.
[PROT(O)- + AN- + -OPIA (from the blindness to red, which is considered the first of the primary colors).]
pro′ta·nopic (-nŏpĭk) adj.