MedlinePlus Medical Encyclopedia: Extraocular muscle function testing

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Extraocular muscle function testing

Contents of this page:
Illustrations Alternative Names Definition How the Test is Performed How to Prepare for the Test How the Test Will Feel	Why the Test is Performed Normal Results What Abnormal Results Mean Risks Considerations

Illustrations

Eye

Eye muscle test

Alternative Names Return to top

EOM; Extraocular movement; Ocular motility examination

Definition Return to top

This test 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.

Update Date: 2/22/2007

Updated by: Manju Subramanian, MD, Assistant Professor in Ophthalmology, Vitreoretinal Disease and Surgery, Boston University Eye Associates, Boston, MA. Review provided by VeriMed Healthcare Network.

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