Characterization of dichromat and trichromat observers using a PC-based anomaloscope

Abstract A system is presented for characterizing anomalous colour observers according to the type of colour vision deficiency that they suffer. The system is based on the simulation of a Pickford–Nicholson type anomaloscope using a cathode ray tube and a personal computer. By means of this method, it has been possible to determine the type of deficiency of the red–green chromatic channel presented by various anomalous observers.