In comparing notes with my Philosopher I am chagrined at my own color-blindness.
Color-blindness is not a defect of the eye, but a defect of the brain.
In color-blindness, the system is reduced to one or two dimensions, instead of three.
It is a case of color-blindness, as it were—supposing you two were colors.
Apart from color-blindness and such possibilities, we see the Hall in different perspectives.
Symonds compared inversion to color-blindness; and such a comparison is reasonable.
But there are some who inherit or develop various degrees of color-blindness; and a word in their behalf may be opportune.
The Belgian government instituted an investigation into the cause of the prevalence of color-blindness.
These contrasted cases are indeed convenient tests for color-blindness.
Holmgren has since discovered cases of color-blindness in which the violet sensation is absent.