protanopic vs red-blind

protanopic and red-blind both are adjectives.

Word	Noun	Adjective	Verb	Adverb
protanopic	No	Yes	No	No
red-blind	No	Yes	No	No

As adjectives, protanopic and red-blind are synonyms defined as:

protanopic and red-blind: inability to see the color red or to distinguish red and bluish-green

protanopic (adjective)	red-blind (adjective)
inability to see the color red or to distinguish red and bluish-green	inability to see the color red or to distinguish red and bluish-green