Blue Weak

A slightly misleading name for Tritanomaly.

The name derives probably from the blue-yellow opponent channel, which is – by definition – skewed to the yellow side in Tritans, typically because they are less sensitive to blue light.

“Blue weak” infers that the cause of Tritanomaly is a decrease in sensitivity of the S-Cone or S-Opsin, but this is only sometimes the case. It can also infer that the individual sees blue as paler (less saturated) or darker, which is sometimes untrue.

In fairness, Blue Weak is the least misleading of the related terms (“____ Weak” and “____ Blind”). See Blue Blind.