The Visual Evoked Potential in Humans

The visual evoked potential (VEP) is recorded in humans in response to flash or pattern stimuli with appropriately placed electrodes over the occipital scalp. In recent years the multifocal VEP (mfVEP) has been developed as a means of obtaining focal responses rather than just a summed response from the central field. The mfVEP has been used as a form of objective perimetry to detect visual field loss in glaucoma. This chapter covers conventional VEP recording and some principles of the multifocal technique.