Luminance-Duration Relationship in the Electric Response of the Human Retina*

Measurements of the magnitude of the a and b waves of the human electroretinogram on the right eye of one dark adapted observer have been carried on over a range of durations [5 to 143 msec] and retinal illuminances [2.61 (10)6 to 2.61 (10)2 trolands] of the stimulating flash. The results have been analyzed in terms of their implications for photochemical theory of the voltage generation in the electroretinogram as well as for the theory of metacontrast.