Jules is a 14-year-old boy who has been diagnosed with red-green color blindness. The clinic nurse is doing some teaching regarding the color blindness. The nurse starts out by educating Jules that people who can see all colors have all of the pigments present in the cones in the retina, and people who have inherited color blindness are missing pigments within the cones of the retina. The nurse is knowledgeable about the four aspects necessary for the sensory process. Which step in the process is not functioning in the diagnosis of color blindness?
A) Receptor
B) Perception
C) Impulse conduction
D) Stimulus
