Visual Evoked Potential Test Overview

A visual evoked potential test (VEP) is used to look for problems in the brain that affect vision. A machine records brain waves related to the nerves that make up the visual pathway. This test can evaluate a large part of the brain.

Optic Nerve and Muscles © 2009 Nucleus Medical Media, Inc.

Prior to Test

You will be given instructions to prepare for the test, such as:

• Wash your hair. Avoid hair chemicals (eg, hair sprays, gels).
• Get a good night’s sleep.
• Bring your corrective eyewear.

Description of Test

Wires will be attached to your scalp with adhesive. 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.

The wires will be removed from your head.

After Test

You will be able to leave after the test is done.

How Long Will It Take?

About 45 minutes

Will It Hurt?

No

Your doctor will discuss the results with you and any further treatment that may be needed.

RESOURCES:

National Eye Institute
http://www.nei.nih.gov/

National Multiple Sclerosis Society
http://www.nationalmssociety.org/

CANADIAN RESOURCES:

Canadian Association of Optometrists
http://www.opto.ca/en/index.html

Canadian Ophthalmological Society
http://www.eyesite.ca/

References:

Evoked potential studies. St. John's Mercy Healthcare website. Available at: http://www.stjohnsmercy.org/healthinfo/test/neuro/TP014.asp . Accessed September 8, 2005.

Merck Medicus website. Available at: http://www.merckmedicus.com/pp/us/hcp/thcprajcontent.jsp?pg=/ppdocs/us/hcp/content/raj/chapters/raj-ch-026-s003.htm . Accessed September 8, 2005.