Comparing two inferior oblique weakening procedures: Disinsertion versus myectomy

Aghdam, K.A. and Asadi, R. and Sanjari, M.S. and Sadeghi, A. and Razavi, M. (2021) Comparing two inferior oblique weakening procedures: Disinsertion versus myectomy. Journal of Ophthalmic and Vision Research, 16 (2). pp. 212-218.

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Purpose: To compare two methods for treating inferior oblique overaction (IOOA): Disinsertion versus myectomy of the muscle. Methods: In this prospective interventional case series, patients were randomly assigned to undergo either IO myectomy or disinsertion. The changes in vertical and horizontal deviations following these two surgical procedures were evaluated. The postoperative IO function of grade 0 or +1 and the fundus extorsion of grade 0 or +1 was considered as the successful outcome. Results: Thirty-six patients (50 eyes) with a mean age of 12.67 ± 4.05 years were included. In the myectomy group, the mean preoperative hyperdeviation in adduction was 29.5 ± 9.32 prism diopter (PD), which decreased to 9.15 ± 7.86 PD after surgery (P = 0.001). In the disinsertion group, these measurements were 32.73 ± 12.42 and 12.65 ± 9.34 PD before and after the surgery, respectively (P = 0.001). The success rate of surgery based on the IOOA grading was 87.4 and 92.3 in the myectomy and disinsertion groups, respectively (P = 0.780). The successful correction rate of abnormal fundus torsion was 91.6 in the myectomy and 88.4 in the disinsertion group (P = 0.821). In comparison, 48 of the cases in the myectomy group and 50 in the disinsertion group were within the normal range of torsional position postoperatively (P = 0.786). There was no statistically significant difference in terms of changes in the horizontal or vertical deviations, V-pattern, and dissociated vertical deviation between the two groups. Conclusion: Both surgical techniques seem to be effective for treatment of inferior oblique muscle overaction © 2021 JOURNAL OF OPHTHALMIC AND VISION RESEARCH | PUBLISHED BY PUBLISHED BY KNOWLEDGE E.

Item Type: Article
Additional Information: cited By 0
Subjects: WL Nervous System
WE Musculoskeletal System
Depositing User: eprints admin
Date Deposited: 30 Apr 2022 04:16
Last Modified: 30 Apr 2022 04:16

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