GATE 2021 XH5 – Question 34

Perception, Learning, Memory and Forgetting · Sensation: Sensory thresholds and adaptation, vision, hearing, touch and pain, smell and taste, kinesthesis and vestibular sense · 1 mark · Multiple choice

Which colour-vision deficiency concerns blue–yellow discrimination?

Tritanopia
Protanopia
Deuteranopia
Ritalin

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Show answer and explanation

Correct answer: (A) Tritanopia

Explanation

Tritanopia involves absent or nonfunctional short-wavelength cone function and the associated blue–yellow discrimination deficit, A. Protanopia and deuteranopia concern long- and medium-wavelength cone pathways and are commonly grouped as red–green deficiencies.

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