 Extraocular muscle function testing
Definition Alternative Names How the test is performed How to prepare for the test How the test will feel Why the test is performed Normal Values What abnormal results mean What the risks are Special considerations References DefinitionThis test is an examination of the function of the eye muscles. A doctor observes the movement of the eyes in six specific directions. Alternative NamesEOM; Extraocular movement; Ocular motility examinationHow the test is performedYou 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 testNo special preparation is necessary for this test. How the test will feelThe test involves only normal movement of the eyes. Why the test is performedThis 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 ValuesNormal movement of the eyes in all directions. What abnormal results meanEye 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. What the risks areThere are no risks associated with this test. Special considerationsSlight nystagmus is normal with an extreme sideways gaze. References
Review Date: 2/22/2007
Reviewed 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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