Tritan color vision defect corresponds to which deficiency?

Tritan color vision defect corresponds to which deficiency?

• A. Blue-yellow deficiency
• B. Red-green deficiency
• C. Green-blue deficiency
• D. Total color blindness

Answer: (A)

Tritan defects involve the short-wavelength (S) cones, so the deficiency is blue-yellow. Problems with S-cone function disrupt how blues and yellows (and some blues vs greens) are distinguished, making blue-yellow discrimination particularly impaired. By contrast, red-green deficiencies involve the L and M cones and are far more common, while a complete lack of color vision would be achromatopsia, not a selective blue-yellow issue.

Tritan defects involve the short-wavelength (S) cones, so the deficiency is blue-yellow. Problems with S-cone function disrupt how blues and yellows (and some blues vs greens) are distinguished, making blue-yellow discrimination particularly impaired. By contrast, red-green deficiencies involve the L and M cones and are far more common, while a complete lack of color vision would be achromatopsia, not a selective blue-yellow issue.