Electrooculography

Electrooculography (EOG) is a test which measures electrical activity in the muscles moving the eyes. It is used to assess the operation of the retina and the nervous system, which is in charge of eye movement.

During the EOG test, electrodes are placed on the skin around the eyes. Such electrodes measure the electrical activity of ocular muscles, when the eyes are moved upwards, downwards, and to the sides. The patient may also follow a light or a visual pattern, to measure the electrical response of such muscles to visual stimuli.

It is a non-invasive test. It is rapid and safe, and may be done in an ophthalmic clinic or a medical center. The results will help doctors to diagnose and plan the treatment of ocular and neurological disorders.

The EOG is a non-invasive, fast, and safe test that can be performed in an eye office or medical center. The test results can help doctors diagnose and plan treatment for eye and neurological disorders.

During the electrooculogram (EOG) exam, electrodes are placed on the skin around the patient's eyes. These electrodes measure the electrical activity of the eye muscles as you move your eyes up, down, and to the sides.

Two electrodes are usually placed on the skin around the eyes, one at the inner corner of the eye and the other at the outer corner. The patient may be asked to follow a light or visual pattern to measure the electrical response of the eye muscles to visual stimuli.

The EOG exam is a non-invasive procedure and generally takes 10 to 20 minutes to complete. The patient sits in a chair and remains awake and alert throughout the exam. Anesthesia and sedation are not required for the EOG exam.

After the exam, the results are recorded and compared to normal reference values. The results are used to assess the function of the retina and the nervous system that controls eye movement, which can aid in the diagnosis of ocular and neurological disorders.

This test records the difference in electric potential between cornea and retina. Besides, it measures the electric variations produced in the eye at the moment of a saccadic movement. Thanks to EOG, it is also possible to diagnose sleep disorders, such as narcolepsy.