ZocdocAnswersHow is eclectrooculography used to record eye movements?

Question

How is eclectrooculography used to record eye movements?

Hi, doctor. They are using eclectrooculography to study my eye movments. How does this process work?

Answer

In electrooculography (EOG) electrodes are placed on your skin near your eyes and it measures changes in resting potential between the eyes as they move. For example, if the right eye is moved to the right, the electrode on that side notes that positive movement and the opposite electrode see the negative aspect of this eye movement. This results in a potential difference between the two electrodes. Thus, this recorded potential change is a measure of eye movement. There are various different uses of EOGs and your physician can help describe its use in your specific situation. An EOG is often used as part of a polysomnogram (sleep study) to detect eye movements. A full night polysomnogram also includes electroencephalography to measure brain waves, electromyography which measures muscle movements, electrocardiography to measure heart rate and rhythm, and a pulse oximeter to measure blood oxygen saturation levels. An EOG is useful in assessing the function of the ocular pigment epithelium. It can be used to measure the difference in potential between light and dark environments. EOG has been used in animation movies to help capture actors' true eye movements. It has also been used to help gamers improve their playing speed. You should follow up with your primary care physician to discuss electrooculography, its use, benefits, and disadvantages. Pulmonologists (lung doctors) can help with sleep studies and an ophthalmologist (eye doctor) can be consulted if you have any ocular concerns.

This answer is for general informational purposes only and is not a substitute for professional medical advice.

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