Electroretinography (ERG) Explained Testing Services

Electroretinography is an electrophysiological test of the retina, the layer of the eye which detects light. The electroretinogram (ERG) is to the retina what the electrocardiogram (ECG) is to the heart. Just as an ECG is crucial to diagnosing illness and monitoring the heart’s function, ERG plays a critical role in the care of the eye, and is instrumental in the early detection of retinal dysfunction.