Visual Evoked Potential Test
DefinitionA 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|
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Reasons for TestThis test is often used to:
- Diagnose and follow multiple sclerosis (MS)
- Test vision in children and adults who are unable to read eye charts
Possible ComplicationsThere are no major complications associated with this procedure.
What to Expect
Prior to TestYou 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 TestWires 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 TestYou will be able to leave after the test is done.
How Long Will It Take?About 45 minutes
Will It Hurt?No
ResultsYour doctor will discuss the results with you and any further treatment that may be needed.
Call Your DoctorCall your doctor if you have any concerns.In case of an emergency, call for emergency medical services right away.