, Volume 120, Issue 1, pp 111-119
Date: 14 Oct 2009

ISCEV standard for clinical visual evoked potentials (2009 update)

Abstract

Visual evoked potentials (VEPs) can provide important diagnostic information regarding the functional integrity of the visual system. This document updates the ISCEV standard for clinical VEP testing and supersedes the 2004 standard. The major change in this revision is that test parameters have been made more precise to achieve better consistency of results within and between test centers. The ISCEV standard VEP protocols are defined for a single recording channel with a midline occipital active electrode. These protocols are intended for assessment of prechiasmal function; additional electrode sites are recommended for evaluation of chiasmal and postchiasmal function. ISCEV has selected a subset of stimulus and recording conditions that provide core clinical information and can be performed by most clinical electrophysiology laboratories throughout the world. These are: 1. Pattern-reversal VEPs elicited by checkerboard stimuli with large 1° (i.e., 60 min of arc; min) and small 0.25° (15 min) checks. 2. Pattern onset/offset VEPs elicited by checkerboard stimuli with large 1° (60 min) and small 0.25° (15 min) checks. 3. Flash VEP elicited by a brief luminance increment, a flash, which subtends a visual field of at least 20°.

This document was prepared for the International Society for Clinical Electrophysiology of Vision (ISCEV) and document was approved by the membership of ISCEV in Abano Terme, Italy on July 10, 2009.
In memory of Vaegan (1943–2009): friend, dedicated ISCEV member, and member of this VEP standardization committee.