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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. 


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?


When will I get the results?


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


Neurophysiology Department   01422 222976