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Extraocular muscle function testing

Contents of this page:

Illustrations

Eye
Eye
Eye muscle test
Eye muscle test

Alternative Names    Return to top

EOM; Extraocular movement; Ocular motility examination

Definition    Return to top

Extraocular muscle function testing is an examination of the function of the eye muscles. A doctor observes the movement of the eyes in six specific directions.

How the Test is Performed    Return to top

You are asked to sit or stand with your head erect and a forward gaze. Your health care provider will hold a pen or other object 12 inches in front of your face. He or she will then move the object in several directions and ask you to follow it with your eyes, without moving your head.

How to Prepare for the Test    Return to top

No special preparation is necessary for this test.

How the Test Will Feel    Return to top

The test involves only normal movement of the eyes.

Why the Test is Performed    Return to top

This test is performed to evaluate any weakness or other problem in the extraocular muscles, which may result in double vision or rapid, uncontrolled eye movements.

Normal Results    Return to top

Normal movement of the eyes in all directions.

What Abnormal Results Mean    Return to top

Eye movement disorders may be due to abnormalities of the muscles themselves or problems in the sections of the brain that control these muscles. Your doctor will discuss any abnormalities identified.

Risks    Return to top

There are no risks associated with this test.

Considerations    Return to top

Slight nystagmus is normal with an extreme sideways gaze.

References    Return to top

Baloh RW. Neuro-ophthalmology. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 450.

Update Date: 2/22/2009

Updated by: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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