ISSN: 2459 - 1777 | E-ISSN 2587-0394

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Surgical Management of Primary Inferior Oblique Muscle Overaction: A Subgroup-Specific Surgical Approach [Beyoglu Eye J]
Beyoglu Eye J. 2020; 5(1): 38-42 | DOI: 10.14744/bej.2020.81904

Surgical Management of Primary Inferior Oblique Muscle Overaction: A Subgroup-Specific Surgical Approach

Ercan Ozsoy1, Abuzer Gunduz2, Emrah Özturk3, Cem Cankaya2
1Department of Ophthalmology, Haseki Training and Research Hospital,University of Health Sciences, Istanbul, Turkey
2Department of Ophthalmology, Inonu University Faculty of Medicine, Malatya, Turkey
3Department of Ophthalmology, Malatya Training and Research Hospital, Malatya, Turkey

INTRODUCTION: The aim of this research was to assess the surgical results of recession and myectomy procedures in a subgroup of patients who had primary inferior oblique muscle overaction.
METHODS: The records of 94 patients who had been treated due to primary inferior oblique muscle overaction were retrospectively analyzed. The patients were classified into 2 groups according to the severity of the inferior oblique hyperfunction. Recession was performed for patients with a low grade (+1 or +2) inferior oblique hyperfunction, and patients with high grade (+3 or +4) hyperfunction underwent myectomy surgery. Patients demonstrating a horizontal misalignment underwent conventional horizontal muscle surgery along with an inferior oblique weakening procedure.
RESULTS: A total of 134 eyes fulfilled the inclusion criteria. Recession was performed in 95 eyes and myectomy in 39. Surgical success was obtained in 96.8% of the eyes that underwent recession and 97.4% of the eyes that underwent myectomy. Residual inferior oblique hyperfunction was observed in 3 eyes after recession and in 1 eye after myectomy. After surgery, about one-quarter of the patients with unilateral inferior oblique overaction subsequently developed a contralateral inferior oblique overaction.
DISCUSSION AND CONCLUSION: The results of this study demonstrated that both recession and myectomy procedures are effective for treating primary inferior oblique hyperfunction with minimal complications when applied in the appropriate patient.

Keywords: Myectomy, overactive, primary, recession.

Ercan Ozsoy, Abuzer Gunduz, Emrah Özturk, Cem Cankaya. Surgical Management of Primary Inferior Oblique Muscle Overaction: A Subgroup-Specific Surgical Approach. Beyoglu Eye J. 2020; 5(1): 38-42

Corresponding Author: Ercan Ozsoy, Türkiye
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