• 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. This test can evaluate a large part of the brain.
    Optic Nerve and Muscles
    AR00018 96472 optic
    Copyright © Nucleus Medical Media, Inc.

    Reasons for Test

    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.

    What to Expect

    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

    Results

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

    Call Your Doctor

    Call your doctor if you have any concerns.
    In case of an emergency, GET MEDICAL CARE 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/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/thcp%5Fraj%5Fcontent.jsp?pg=/ppdocs/us/hcp/content/raj/chapters/raj-ch-026-s003.htm . Accessed September 8, 2005.

    Revision Information

  • Join WellZones today.

    Make a Change For LifeLearn more

    Wellmont LiveWell is creating a new tradition of wellness in the mountains by providing individuals with tools and encouragement to live healthier lifestyles.

  • HeartSHAPE Spotlight

    HeartSHAPE® Test Learn more

    Fight heart disease early and prevent heart attacks with HeartSHAPE® - a painless, non-invasive test that takes pictures of your heart to scan for early-stage coronary disease.

  • Calories and Energy Needs

    Calorie NeedsLearn more

    How many calories do you need to eat each day to maintain your weight and fuel your physical activity? Enter a few of your stats into this calculator to find out.

  • Ideal Body Weight

    Ideal Body WeightLearn more

    Using body mass index as a reference, this calculator determines your ideal body weight range. All you need to do is enter your height.

  • Body Mass Index

    Body Mass IndexLearn more

    This tool considers your height and weight to assess your weight status.


  • Can we help answer your questions?

    Wellmont Nurse Connection is your resource for valuable health information any time, 24 hours a day, seven days a week. Speak to a Nurse any time, day or night, at (423) 723-6877 or toll-free at 1-877-230-NURSE.