Welcome Employees

A password is required to submit a request for an internal transfer. In order to obtain the password you can check any of the following resources: Login to the employee portal, check the current issue of "Regional High Points" newsletter, contact HR, or read this week's "Daily Announcements".

 

Close

Visual Evoked Potential Test

(VEP)

Definition

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.

Optic Nerve and Muscles

AR00018_96472_optic
Copyright © Nucleus Medical Media, Inc.

Reasons for Test    TOP

This test is often used to:

  • Diagnose and follow multiple sclerosis (MS)
  • Test vision in children and adults who are unable to read eye charts

There are many symptoms that might lead your doctor to order a VEP. You may be having double vision, blurred vision, or loss of part or all of your vision.

Possible Complications    TOP

There are no major complications associated with this procedure.

What to Expect    TOP

Prior to Test

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

  • Wash your hair. Avoid hair chemicals such as hair sprays and gels.
  • Get a good night’s sleep.
  • Bring your corrective eyewear.

Description of Test

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.

The wires will be removed from your head.

After Test    TOP

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

How Long Will It Take?    TOP

About 45 minutes

Will It Hurt?    TOP

No

Results    TOP

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

Call Your Doctor    TOP

Call your doctor if you have any concerns.

In case of an emergency, call for medical help right away.

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

References:

Evoked potentials. National Multiple Sclerosis Society website. Available at:
...(Click grey area to select URL)
Accessed July 17, 2014.
Evoked potentials studies. Johns Hopkins Medicine website. Available at:
...(Click grey area to select URL)
Accessed July 17, 2014.
Visually evoked potentials. Webvision website. Available at:
...(Click grey area to select URL)
Accessed July 17, 2014.
Last reviewed June 2014 by Eric Berman, MD
Last Updated: 7/17/2014