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Clinical Profile of Extraocular Muscle Palsy: A Retrospective Study

Author(s): Suman Adhikari, BOptom | Nabin Paudel, BOptom | Gauri Shankar Shrestha, MOptom | Ananda Kumar Sharma, MD

Journal: Optometry & Visual Performance
ISSN 2325-3479

Volume: 1;
Issue: 6;
Start page: 198;
Date: 2013;
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Keywords: cranial nerve palsy | etiology | extraocular muscle | Nepal | trauma

Background: The sixth cranial nerve has been found to be the most commonly affected in previous studies of cranial nerve palsies. This study was carried out to determine the most common nerve involved in extraocular muscle (EOM) palsies and the most common cause of EOM palsy in Nepal.Methods: The diagnosed cases of third, fourth, or sixth nerve palsy for 10 years (2000-2010) at the B.P. Koirala Lions Center for Ophthalmic Studies outpatient department were included in the study. A retrospective review of patients’ records was performed, and the causes of EOM palsy were grouped as: vascular, trauma, tumor,aneurysm, undetermined, and others. Recovery of the palsy was evaluated by reviewing the records of the patients who were followed up one month after the initial visit.Results: A total of 838 patients was included in the study. The average patient age was 37 years. The sixth nerve was most commonly affected (n=458, 54.65%), and the most common etiology was undetermined (n=408, 48.68%). Among the cases where the cause of palsy was known, the largest number of patients had trauma (n=188, 16.46%).Conclusion: It was concluded that in Nepal, the most commonly affected cranial nerve is the sixth nerve, in accordance with the other studies done in the past in different parts of the world. Most of the cases of cranial nerve palsy were found to have no specific cause and were not associated with diagnosed systemic disease.
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