Question

If a person looking at a poster sees green instead of yellow and doesn't see red at all, this person most likely has color blindness where _______ nerves fail to respond to light properly.

A. yellow-sensitive
B. blue-sensitive
C. red-sensitive
D. green-sensitive

Answer 1

Red - sensitive so answer is c

Answer 2

Answer: The correct answer for the fill in the blank is C. red-sensitive.

Colorblindness occurs when one or more type of cone cells ( light sensitive cells in the retina for color vision) are either not present or have very low spectral sensitivity.

In this case, the L type of cone cells would be damaged or absent as they are responsible for detecting long wavelength of light ( responsible for yellow and red colors)

Thus, when a person who is looking at a poster, sees green color instead of yellow and doesn't see red at all, this person most likely has color blindness where red sensitive nerves fail to respond to light properly.