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Electrophysiology is the study of electrical signals produced by the body. The most commonly known electrophysiology test is the electrocardiogram (the ECG or EKG) - the heart monitor, which measures the electrical waves of the heart. Electrophysiology is also used to monitor brainwave activity in comatose patients, or patients with sleep or seizure disorders.

 In ophthalmology, we use electrophysiology to record the visual system's response to flashes or patterns of light. The size, shape, and speed of these responses can help diagnose or monitor various disorders of the eye, optic nerve, or brain.

 Ophthalmic electrophysiology is used to diagnose retinal disorders, investigate unexplained visual loss, aid in drug discovery, ensure that drugs coming to market don't have an adverse effect on vision, monitor progressive visual disorders, screen for inherited retinal diseases, and more.

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