Blue-blindness Apr 2026

This paper explores the "lived experience" of blue-blindness by studying a patient with "unilateral tritanopia"—someone who is blue-blind in only one eye. It provides unique data on how colors in the spectrum appear to a tritanope compared to a person with normal vision.

This recent open-access paper from MDPI covers the autosomal dominant inheritance pattern of tritan defects and provides up-to-date prevalence data across different global populations. Quick Comparison of Blue-Yellow Defects Impairment Level Common Confusions Tritanomaly Reduced sensitivity (S-cones) Blue/Green, Yellow/Red Tritanopia Complete absence (S-cones) Blue/Green, Yellow/Pink, Purple/Red A Global Perspective of Color Vision Deficiency - PMC - NIH blue-blindness

This is the seminal work on blue-blindness. Wright identified 17 cases of tritanopia through a unique public appeal and established the fundamental luminosity and color-mixture curves for the condition. It provides the classic evidence that tritanopia is caused by the absence of blue-sensitive S-cones. This paper explores the "lived experience" of blue-blindness