What happens to the perception of colors for a Deuteranope when using the Nagel Anomaloscope?

In the context of color vision, a Deuteranope is someone who has a specific type of color vision deficiency, characterized by the absence of medium-wavelength (green) cones in the retina. This results in a significant impairment in the ability to distinguish between different colors, particularly those in the red-green spectrum.

When a Deuteranope uses the Nagel Anomaloscope, they encounter a unique interaction with color perception. The Anomaloscope is designed to assess an individual's color matching ability, and it allows individuals to mix red and green lights to achieve a matched yellow. For a person with a normal trichromatic vision, using the device requires them to adjust the amounts of red and green until the two colors match.

However, a Deuteranope, who lacks green cones, does not perceive green light in the same way and primarily is sensitive to red and blue wavelengths. As they adjust the controls of the Anomaloscope, they will not perceive any dimming effect when attempting to match colors because their sensitivity is primarily directed by the remaining functioning cones, which are those for the longer wavelengths (red) and shorter wavelengths (blue).

Therefore, the perception of colors does not experience a dimming effect based on shorter wavelengths for a