A visual evoked potential test (VEP) measures electrical activity in the brain when a person is exposed to brief visual stimuli.
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This test is done to:
The care team may meet with you to talk about:
Wires will be attached to your scalp with tape. A patch will be placed over one eye. You will watch a screen with your other eye. The process is then repeated with the opposite eye covered. A machine will record your brain wave activity.
The wires will be removed from your head.
About 45 minutes
This test will not hurt.
The doctor will discuss the results of the test with you.
Call your doctor if you have any questions or concerns after the test.
If you think you have an emergency, call for medical help right away.
National Eye Institute
https://nei.nih.gov
National Multiple Sclerosis Society
http://www.nationalmssociety.org
Canadian Association of Optometrists
http://www.opto.ca
Canadian Ophthalmological Society
http://www.cos-sco.ca
Evoked potentials (EP). National Multiple Sclerosis Society website. Available at: https://secure.nationalmssociety.org/docs/HOM/evoked.pdf. Accessed October 1, 2020.
National Institute for Health and Care Excellence (NICE). Management of multiple sclerosis in primary and secondary care. NICE 2014 Oct:CG186.
Sensory evoked potentials studies. Johns Hopkins Medicine website. Available at:
...(Click grey area to select URL)
Accessed October 1, 2020.
Visually evoked potentials. Webvision website. Available at:
...(Click grey area to select URL)
Accessed October 1, 2020.
Last reviewed September 2020 by
EBSCO Medical Review Board
Rimas Lukas, MD
Last Updated: 5/25/2021