Relating to deuteranomaly, a form of color blindness where red and green colors are confused due to abnormal photopigments in cone cells.
From Greek 'deuteros' (second) + 'anomalos' (irregular). This medical term describes the second type of anomalous color vision, where the red-green discrimination is impaired.
Deuteranomaly is the most common form of color blindness, affecting about 1% of males, and it's called 'deutero-' (second) because scientists discovered it second after protanomaly, showing how medical naming follows discovery order, not logic.
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