rare form of dichromacy characterized by a lowered sensitivity to blue light resulting in an inability to distinguish blue and yellow
Blue-blindness, blue being the third of the primary colors, red, green, and blue; see deuteranopia and protanopia.
A variety of color blindness-otherwise known as violet blindness-due to deficiency or absence of one of the three fundamental color perceiving substances in the retina. Compare with protanopia and deuteranopia. [Gr.]