Colour Receptors of the Human Fovea

Abstract

As soon as the results of Granit's micro-electrode experiments on the retinæ of animals were published, it was clear that a method was wanted for obtaining similar information with regard to the colour vision of man. This led to the development of the retinal microstimulator, which consists essentially of a microscope used in reverse, so that greatly diminished images of suitable test light-sources are presented to the eyes of the observer.