Visual Evoked Response (VER) refers to a neurophysiological phenomenon that occurs as a result of the brain's response to visual stimuli. Also known as visually evoked potential (VEP) or visual evoked potential (VEP), it is a signal generated in the visual cortex of the brain when the eyes are exposed to visual stimuli such as light flashes or patterned images.
VER is typically measured using electroencephalography (EEG), where electrodes are placed on the scalp to record the electrical activity of the brain. The stimulus, which can be presented on a screen, a series of light flashes, or patterns, triggers a synchronous electrical response in the visual system. This response is then captured by the EEG, which records the neural activity in the form of visual evoked potentials.
The VER waveform comprises several components or peaks, each reflecting different stages of neural processing. The latency and amplitude of each component can provide valuable information about the integrity and functionality of the visual system. Analysis of the VER can be used for diagnostic purposes, evaluating the visual function, detecting abnormalities or dysfunctions in the visual pathway, and assessing the effects of various medications or treatments.
VER is commonly used in clinical settings, especially in ophthalmology and neurology, to assess visual impairments, optic nerve disorders, multiple sclerosis, and other neurological diseases that may impact visual function. Moreover, VER can also be utilized in research settings to investigate visual perception, cognition, and the effects of age or diseases on the visual system.
