visual evoked potential
Also written as: VEP — visual evoked potential
An electrophysiological test measuring cortical responses to visual stimuli, used to assess visual pathway function in non-verbal children.
Full Definition
Visual evoked potential (VEP) testing records electrical activity in the visual cortex in response to specific visual stimuli, typically pattern reversal checkerboards. In pediatric ophthalmology, VEP is invaluable for objectively assessing visual acuity and detecting visual pathway abnormalities in infants and children who cannot participate in standard vision testing. The test can reveal cortical visual impairment, optic nerve dysfunction, and estimate visual acuity in non-verbal patients. VEP amplitudes and latencies provide quantitative measures of visual system integrity.
Usage
Usage note: Distinguish from ERG (electroretinogram) which tests retinal function, not cortical responses.
In Context
- "Visual evoked potential testing revealed delayed P100 latencies consistent with optic nerve dysfunction." — Electrophysiology report
- "VEP was performed to assess cortical visual function in this developmentally delayed infant." — Clinical assessment documentation