Visual evoked potentials are changes in electrical potentials recorded in the corresponding parts of the nervous system when certain stimuli are given to the optic nerve. Visual evoked potentials provide insight into the integrity of the entire pathway from the retina to the visual cortex, and can be recorded in the visual cortex by stimulating the left and right eyes separately. Changes in potential generation can be recorded in the extracranial occipital region of the visual cortex by stimulating the retina with flashes of light or patterns of a certain intensity within the visual field. If a lesion occurs at a certain level, changes in latency, amplitude, and waveform will occur in the corresponding part of the evoked potential. Visual evoked potentials can be used to aid in the diagnosis of optic neuritis, multiple sclerosis, and compressive changes in the anterior visual pathway. It is recommended that the test results be interpreted in the context of the patient’s specific situation under the guidance of a medical professional.