Vaughan & Asbury's General Ophthalmology, 18th Edition (LANGE Clinical Medicine) by Riordan-Eva Paul & Cunningham Emmett

Author:Riordan-Eva, Paul & Cunningham, Emmett [Riordan-Eva, Paul]
Language: eng
Format: mobi, epub
Publisher: McGraw-Hill
Published: 2011-05-16T14:00:00+00:00

Incomitant strabismus results from paresis or restriction of action of one or more extraocular muscles. Incomitant esotropia is usually due to paresis of one or both lateral rectus muscles as a result of unilateral or bilateral abducens nerve palsy. Other causes are fracture of the medial orbital wall with entrapment of the medial rectus muscle, Graves’ ophthalmopathy causing fibrosis of the medial rectus muscles, and Duane’s retraction syndrome (see later in the chapter). Abducens nerve palsy is most frequently seen in adults with systemic hypertension or diabetes, in which case spontaneous resolution usually begins within 3 months (see Chapters 14 and 15). It may also be the first sign of intracranial tumor, increased intracranial pressure, or inflammatory disease. Associated neurologic signs are then important clues. Head trauma is another frequent cause of abducens palsy.

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