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Extraocular Muscle Palsy in Patients With Chronic Orbital Myositis Publisher Pubmed



Akbari MR1 ; Mirmohammadsadeghi A1 ; Eshraghi B2 ; Asadi Amoli F1 ; Mehrpour M1
Authors
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Authors Affiliations
  1. 1. Eye Research Center, Strabismus Department, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Orbit and Oculoplastic Department, Isfahan University of Medical Sciences and Health Services, Isfahan, Iran

Source: Journal of Binocular Vision and Ocular Motility Published:2020


Abstract

Background: Orbital myositis (OM) is a subgroup of idiopathic orbital inflammation. It can involve single or multiple extraocular muscles and result in restriction or paresis of extraocular muscles. Method: We reported two unusual cases of extraocular muscle paresis in the fibrotic stage of chronic OM and reviewed the literature related to this finding. Results: The first case was of a 38-year-old woman with chronic OM with large-angle right eye exotropia and right medial rectus paresis. She received a botulinum A toxin injection into the right lateral rectus muscle as a first treatment, but it was unsuccessful in correcting her deviation. Subsequently, she underwent two strabismus surgeries, which successfully resolved her diplopia in primary gaze. The second case was of a 35-year-old woman with chronic OM and left lateral rectus palsy, which was managed with a botulinum A toxin injection. Conclusion: OM can cause extraocular muscle palsy in the chronic fibrotic stage of the disease. © 2020 American Orthoptic Journal Inc.