Minimum spectral saturation, or achromatic points, were determined for protanopes and deuteranopes by a method of adjustment. Protanopic achromatic points were found to lie about 490 nm, whereas deuteranopic achromatic points ranged from 495 to 505 nm. The achromatic point distributions were invariant when intensity was increased by 1 log unit. In comparison to three alternative forcedchoice color-naming, the protanopic achromatic point fell in the region of the blue to green name transition and the deuteranopic achromatic point fell in the region of the green to yellow name transition.
ASJC Scopus subject areas
- Sensory Systems