Welcome to the specialty testing center here at the UC Davis Health System Eye Center.

Our lab is equipped with the latest equipment used to perform several tests to measure visual function.

Our trained technicians are COA certified by The Joint Commission and are skilled at performing many testing services, including:

- EOG (Electro-oculogram), which measures the difference in the electrical potential between the front and the back of the eye in response to periods of dark and light.

- VEP (Visual evoked potential) tests check the visual pathway from the eyes to the brain. VEP measures the electrical response of the patient’s visual system.

- ERG (Electroretinagram) is a test used to detect abnormal function of the retina. Specifically, in this test, the light sensitive cells of the eye, the rods and cones, and their connecting cells in the retina are examined.

- MfERG (Multifocal electroretinaogram) is much like the standard ERG in that it is testing the retina. The difference is that the multifocal ERG focuses on different areas of the retina, looking for localized areas of abnormality.

- MfVEP (Multifocal Visual evoked potential) is an objective measurement of the visual field. The MfVEP records the activity of the visual cortex in response to stimulation of localized areas of the visual field.

We accept referrals for these services and can provide test results in approximately 2-4 weeks.

If you are scheduled for one of the above testing services, please read our patient instructions (PDF). These instructions will provide detailed information about what to expect at your appointment. If you require more information, click the ‘contact us’ link to the right of this page.


Specialized Testing Staff

Equipped to serve the growing needs of the region, the specialized testing center is staffed by two C.O.A. certified technicians skilled at performing the latest tests in measuring visual function.