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| Effect of Silicone Band Partly Loop Myopexy in the Treatment of Severe Myopic Strabismus Fixus |
| Changmei Guo, Guiou Zhang, Lu Zhang, Namin Li, Meng Fu |
| Department of Ophthalmology, Xijing Hospital, Eye institute of Chinese PLA, Fourth Military Medical of University, Xi’an 710032, China |
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Abstract Objective: To investigate the safety and efficacy of silicone band partly loop myopexy combined with medial rectus recession in the treatment of severe myopic strabismus fixus (MSF). Methods: Retrospective analysis of 8 patients (12 eyes) with severe MSF who underwent monocular or binocular silicone band partly loop myopexy to unite the temporal 1/2 of superior rectus muscle and superior 1/2 of lateral rectus muscle, meanwhile combined with medial rectus recession in the Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University from March 2017 to April 2021. The age ranged from 30 to 80 years, with an average of 53.8±15.6 years. The spherical equivalent was -26.0--13.50 diopter (D),with an average of -20.41±4.12 D. The axial length measured by B-ultrasound was 26.34-35.30 mm, with an average of 30.16±2.51 mm. The postoperative follow-up was 6 months to 3 years. The esotropia, hypotropia, limitation of abduction and elevation, and the change of angle of globe dislocation (AGD) were analyzed before and after operation. The data differences were compared and analyzed by paired t test and Wilcoxon signed-rank test. Results: After surgery, the mean of esotropia decreased from +101±13 PD to +3± 5 PD. hypotropia decreased from 30 (25, 34)PD to 0 (0, 0)PD. Mean abduction limitation decreased from -5 (-5, -5) to -2 (-3, -1), and mean limitation of elevation decreased from -5 (-5, -5) to -2 (-2, -2). These were statistically significant differences (P<0.01). Both the preoperative and postoperative imaging data of 8 eyes of 5 patients were available. The mean AGD decreased from 185°±28° before operation to 121°±19° after operation (t=8.96, P<0.001). There were 3 patients with compensatory head position before surgery, and the head position significantly reduced or disappeared after surgery. Three patients had foreign body sensation in the eyes after surgery which disappeared 3 weeks later. Conclusion: Silicone band partly loop myopexy to unite 1/2 superior rectus and 1/2 lateral rectus combined with medial rectus recession, is a safe and effective operation for severe MSF, which can obviously correct serious ocular deviation and improve ocular motility.
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Received: 27 December 2021
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| Fund: Shanxi Natural Science Basic Research Project (2021JZ-30); Multidisciplinary Projects of the
Boosting Program of Xijing Hospital (XJZT19MDT12); Natural Science Foundation of China (81470655) |
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Corresponding Authors:
Changmei Guo, Department of Ophthalmology, Xijing Hospital, Eye institute of Chinese PLA, Fourth Military Medical of University, Xi’an 710032, China (Email: gcm2@163.com)
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