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Abri Aghdam K, Asadi R, Soltan Sanjari M, Sadeghi A, Razavi M. Comparing Two Inferior Oblique Weakening Procedures: Disinsertion versus Myectomy. JOVR [Internet]. 2021Apr.29 [cited 2024Apr.26];16(2):212–218. Available from: https://knepublishing.com/index.php/JOVR/article/view/9085

https://doi.org/10.18502/jovr.v16i2.9085

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authors

  • Kaveh Abri Aghdam

    Kaveh Abri Aghdam

    Eye Research Center, The Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
  • Reza Asadi

    Reza Asadi

    Eye Research Center, The Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
  • Mostafa Soltan Sanjari

    Mostafa Soltan Sanjari

    Eye Research Center, The Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
  • Ali Sadeghi

    Ali Sadeghi

    Eye Research Center, The Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
    https://orcid.org/0000-0001-5009-5771
  • Meshkat Razavi

    Meshkat Razavi

    Eye Research Center, The Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran

Published Date

  • Apr 29, 2021
This journal is publishing all the articles under Creative Commons Attribution License CC BY 4.0.

Comparing Two Inferior Oblique Weakening Procedures: Disinsertion versus Myectomy

Journal of Ophthalmic and Vision Research (JOVR) / April–June 2021, Volume 16, Issue 2 / Pages 212–218

Abstract

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.

Keywords:

Disinsertion of Inferior Oblique Muscle, Inferior Oblique Muscle Overaction, Strabismus

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