What is a VAP?

A VEP (visual evoked potential) test evaluates the visual pathways in your brain. During the test, you will watch a monitor with a moving checkered pattern. Watching the moving pattern produces electrical activity in your brain that is measured by several electrodes attached to your head.

How long does it take?

About 45 minutes.

Why is a VEP performed?

It is used if you are experiencing double vision, blurred vision, and loss of part or all of your vision, eye injuries, head injuries, or weakness of eyes, arms, or legs.

Does it hurt?

No, you will experience no pain or discomfort.

How is the VEP performed?

• After your head is measured, electrodes are placed on specific locations on your scalp.
• Nothing goes into or under your skin.
• A patch will be placed over one of your eyes.
• You will sit  in a chair and be asked to stare at a little red dot on a video monitor.
• Each eye will be tested separately.