| Subject | Contents |
| Definition | An examination of the function of the eye muscles, which is done by a doctor observing the movement of the eyes in six specific directions.
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| Alternative Names | EOM; Extraocular movement; Ocular motility examinatin |
| How the test is performed | 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. Without moving your head, the examiner will move the object from a center point in space out to the periphery at the following angles and ask you to follow without moving your head: 45 degrees, 90 degrees, 135 degrees, 180 degrees, 225 degrees, 270 degrees, 315 degrees, and 360 degrees. |
| How to prepare for the test | No special preparation is necessary for this test. |
| How the test will feel | The test involves only normal movement of the eyes. |
| Why the test is performed | This test is performed to evaluate any weakness or other defect in the extraocular muscles which may result in double vision or nystagmus . |
| Normal Values | Normal movement of the eyes in all cardinal directions. |
| What abnormal results mean | If there are oscillations of the eyes during the test, nystagmus is present. For more information on the clinical significance of fine oscillations in the eye see nystagmus. |
| What the risks are | There are no risks associated with this test. |
| Special considerations | Minute nystagmus at extreme lateral (to the side) gaze is normal. |
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