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Electro-oculography (EOG)

What is an EOG?

An EOG is a specialised eye test that measures the function of a particular part of the retina.   It gives information about how healthy cells are in the retina .

How is it performed?

The test is painless.  The test is performed by attaching leads to the skin at each side of each eye.  You then need to look into a globe and follow a red light from side to side.  The test is performed in the dark and the light.  The leads record the responses of the eyes to the movements of a light.

The test takes approximately 1 hour.

This test is usually performed along with an electro-retinogram (ERG).  If you have been booked for an ERG a separate explanation leaflet will be attached. 

Eye drops - to read 

How do I prepare for the test? 

If you are taking medication please continue to take it and bring a list of your medication with you.

Continue to eat meals as normal.

There are no side effects from the test.

How long will I have to wait?

You have been given a specific appointment time and patients are usually seen on time.  It is important that you arrive on time.  Please allow plenty of time for parking.

When will I get the results?

The results are sent to the doctor that referred you for the test and are usually available within seven days.

If you have any concerns or questions please speak to a Clinical Physiologist on the number below.


Neurophysiology Department   01422 222976