Abstract
Purpose
We evaluated long-term changes in conjunctival bulge after medial rectus muscle (MR) tightening using the plication method.
Study design
Retrospective and observational.
Methods
Patients who underwent MR plication for exotropia from December 2016–March 2020 at Okayama University Hospital were included. Thirty two eyes of 27 patients were enrolled. The thickness from the conjunctiva to sclera (TCS) at the limbus and insertion sites were measured using anterior segment optical coherence tomography preoperatively and 1 month, 4 months, and 12 months postoperatively. Correlations between the 1- and 12 month postoperative TCS and amount of MR tightening were analyzed.
Results
Preoperative and 4 month postoperative TCS at the limbus site were not significantly different (P=0.07). The 12 month postoperative TCS at the insertion site was significantly thinner than at 1 month postoperative (P<0.01), although significantly thicker than the preoperative TCS (P<0.01). No significant correlations were found between the amount of MR tightening (in mm) and 1- or 12 month postoperative TCS at the limbus (P=0.62 and P=0.98, respectively) and insertion (P=0.50 and P=0.24, respectively) sites.
Conclusion
The TCS at the insertion site peaked at 1 month postoperatively, continued to decrease for longer than 4 months postoperatively, continuing until 12 months postoperatively. The TCS at the insertion site 12 months postoperatively is thicker than preoperatively. The TCS at both the limbus and insertion sites was not related to the amount of medial rectus muscle tightening.
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Acknowledgements
This work was supported by the JSPS KAKENHI, grant nos. JP23791987 and JP26861450.We would like to thank Editage for English-language editing.
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T. Shimizu, None; I. Hamasaki, None; K. Shibata, None; S. Morisawa, None; R. Kono, None; K. Kanenaga, None; Y. Morizane, None.
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Corresponding author: Ichiro Hamasaki
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Shimizu, T., Hamasaki, I., Shibata, K. et al. Analysis of temporal changes in thickness from conjunctiva to sclera after plication of the medial rectus muscle measured by anterior segment optical coherence tomography. Jpn J Ophthalmol 67, 612–617 (2023). https://doi.org/10.1007/s10384-023-01006-6
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DOI: https://doi.org/10.1007/s10384-023-01006-6