Electroretinogram, Electroretinography

Abstract

The electroretinogram (ERG) is a Compound potential produced by the layers of the retina in response to visual Stimulation. Electroretinography pertains to the study and recording of this potential. The ERG is important because of its value in basic physiological research, in monitoring peripheral action during the course of psychophysical investigation, and in the diagnosis of a variety of visual disorders. The first ERGs were recorded well over a Century ago, and there has been continuing study of their properties ever since. The ERG is better understood than most mass action potentials, and particularly those that can be recorded with electrodes that are some distance from the source.