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Effect of inferior oblique muscle belly transposition on versions and vertical alignment in primary position

  • Pediatrics
  • Published:
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Abstract

Purpose

To evaluate the effect of inferior oblique muscle belly transposition (IOBT) on vertical deviation (VD) in primary position and inferior oblique overaction (IOOA).

Methods

Twenty-eight patients who underwent unilateral IOBT for mild hypertropia (≤ 10△) due to unilateral IOOA were included. Surgical results regarding the correction of hypertropia, IOOA, and fovea disc angle (FDA) were analyzed and compared between groups A (VD ≤ 5△) and B (5△ < VD ≤ 10△).

Results

IOBT showed an overall reduction of 5.86△ (± 2.24△) of primary position VD, a mean correction of 1.00 (± 0.27) of IOOA, and an average change of 1.83° (± 3.02°) of FDA. The surgical success rate of IOBT for VD correction and IOOA elimination in all patients was 68% and 71%, respectively. The correction of VD was correlated with preoperative VD significantly (r = 0.86, p < 0.001). Consistently, IOBT demonstrated comparable efficacy in reduction of VD between group A and group B (p = 0.507). Furthermore, the two groups were comparable in the success rates for correcting VD and IOOA (both p > 0.05). None of the patients developed consecutive hypotropia, postoperative contralateral IOOA, or anti-elevation syndrome postoperatively.

Conclusions

IOBT achieved satisfactory outcomes in patients with mild primary position VD (≤ 10△) that is associated with unilateral IOOA, without any risk of overcorrection of VD and contralateral IOOA for a follow-up period of up to 12 months. This procedure is considered effective and safe alternative for weakening the IO in patients with appropriate surgical indications.

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Funding

This study was supported by Shanghai Natural Science Foundation (20ZR1409800 to L.Q.W), National Natural Science Foundation of China (81600765 to L.Q.W), Shanghai Outstanding Academic Leaders (2017BR013 to C.Z.), Excellent Academic Leaders of Shanghai (18XD1401000 to C.Z.).

Author information

Author notes

  1. Wenqing Zhu, Xiying Wang and Chao Jiang were contributed equally to this work

Authors and Affiliations

  1. Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, 83 Fenyang Road, Shanghai, 200031, China

    Wenqing Zhu, Xiying Wang, Chao Jiang, Ling Ling, Lianqun Wu & Chen Zhao

  2. NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, 83 Fenyang Road, Shanghai, 200031, China

    Wenqing Zhu, Xiying Wang, Chao Jiang, Ling Ling, Lianqun Wu & Chen Zhao

  3. Shanghai Key Laboratory of Visual Impairment and Restoration, 83 Fenyang Road, Shanghai, 200031, China

    Wenqing Zhu, Xiying Wang, Chao Jiang, Ling Ling, Lianqun Wu & Chen Zhao

Authors
  1. Wenqing Zhu
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  2. Xiying Wang
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  3. Chao Jiang
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  4. Ling Ling
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Corresponding authors

Correspondence to Lianqun Wu or Chen Zhao.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional review board of Eye and ENT Hospital, Fudan University and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

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Informed consent was obtained from all individual participants included in the study.

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The authors declare no competing interests.

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Zhu, W., Wang, X., Jiang, C. et al. Effect of inferior oblique muscle belly transposition on versions and vertical alignment in primary position. Graefes Arch Clin Exp Ophthalmol 259, 3461–3468 (2021). https://doi.org/10.1007/s00417-021-05240-x

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  • DOI: https://doi.org/10.1007/s00417-021-05240-x

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