Which wavelength is most desaturated for a patient with Deuteranopia?

In cases of Deuteranopia, which is a form of red-green color blindness, patients lack the medium-wavelength cones (green). This condition impacts how certain wavelengths are perceived, particularly those that fall within the green spectrum.

Among the given options, the wavelength of 498 nm is situated within the threshold that typically elicits confusion for individuals with Deuteranopia. At this wavelength, colors tend to be less saturated and are more challenging for them to differentiate, making it appear more grayish or desaturated compared to the surrounding colors. This wavelength represents a transition where the spectral sensitivity begins to shift due to the absence of green photoreceptors.

The other wavelengths provided do not correspond to this level of desaturation for someone with Deuteranopia. For instance, wavelengths further into the blue spectrum (like 450 nm) or toward yellow-green (like 570 nm) can still be perceived but typically remain more saturated for the patient than the struggles experienced around 498 nm. Subsequently, while other wavelengths might not appear as vivid, 498 nm is most notably impacted by desaturation in Deuteranopia individuals.