Visual Evoked Response

The St. Luke’s Center for Neuroscience is dedicated to expert care of conditions of the nervous system.

Visual Evoked Response/Potential
(VER or VEP)

A VER is used to check the nerve pathways from the eyes to the parts of the brain which process vision.

What should I do to get ready for this test?

You should take medicines as you usually would. If you wear glasses, wear them or bring them with you.

How long does the test take?

The VER takes about 1 hour.

How is the test done?

  • You may be asked to give a short medical history, including the medicines you are currently taking.
  • The technologist will take some measurements of your head and make some marks on your scalp with a washable marker.
  • Some disks (electrodes) will be attached to your head with a thick paste.
  • You will be asked to stare at a dot on the center of a video screen.
  • With a patch over one eye, you will watch a checkerboard pattern reversing on the screen.
  • The test will then be repeated with the patch over your other eye.

What happens after the test?

Before you leave, all the electrodes and paste will be removed. You can then return to your normal routine.

When will I get the results of the test?

Your doctor will tell you the results of the test. If you have no heard from your doctor after one week, you should call your doctor and ask about the results.

What if I have questions about the test?

Your questions are very important to us. If you have any questions about the test or how it is done, please call 484-526-4627.