Electrophysiological testing is used to provide information about the function of the visual pathway between the eye and brain that goes beyond a standard clinical examination. This is very useful when looking to confirm a diagnosis or rule out related ophthalmic diseases.
Electrophysiological testing is also used to diagnose a variety of inherited retinal diseases, toxic drug exposure, intraocular foreign bodies (a foreign body inside the eye), and retinal vascular occlusions (a blockage in a vein or artery that carries blood to or from the retina).