Consists of ordination of pieces by tones, and the results obtained are inserted into a software that gives a graph and the error score, which allow to characterize and quantify the defects of the chromatic vision.
This test is performed on the suspicion of color blindness or milder changes in color vision, and in pathologies of the retina and the optic nerve.

The examination should be performed with the best possible optical correction, glasses or contact lens.