Electroretinography

Clinical electrophysiological testing of the retina plays a unique role in patient care. The ability objectively to demonstrate the function of the retina and to localise dysfunction to specific retinal cell types or layers by changing the adaptive state of the eye and/or stimulus characteristics, or possibly specific areas of the retina, can assist diagnosis and inform management. Electroretinography is the recording of the bioelectrical potentials originating in the retina in response to visual stimuli. Electrodes in contact with or in relation to the eye record small electrical biopotentials generated within the retina that can be viewed and analysed following suitable amplification.