Abnormality of visual evoked potentials The terms visually evoked potential (VEP), visually evoked response (VER) and visually evoked cortical potential (VECP) are equivalent. An anomaly of visually evoked potentials (VEP), which are electrical potentials, initiated by brief visual stimuli, which are recorded from the scalp overlying the visual cortex. SNOMEDCT_US:102968003 Abnormal visual-evoked potentials Abnormal visual evoked responses HP:0000649 UMLS:C0522214 VEP abnormalities Abnormal vision evoked potentials Abnormal visual evoked potential Abnormal visual electrophysiology Abnormal brain-evoked potentials