Abstract
Purpose
We aimed to investigate misalignment (tilt and decentration) and rotational stability of the implantable collamer lens V4c 6 months after implantation and to explore the potential risk factors associated with postoperative misalignment and rotation.
Methods
A total of 36 eyes of 36 patients with high myopia and myopic astigmatism who underwent implantable collamer lens V4c implantation were included in this study. Tilt, decentration, and rotation of the implantable collamer lens were assessed postoperatively at l week, 1 month, 3 months, and 6 months. Correlation analysis was used to identify the potential risk factors for implantable collamer lens tilt, decentration, and rotation at 6 months postoperatively. Higher-order aberration was measured to evaluate the effect of implantable collamer lens misalignment on visual quality at pupil diameters of 4.0 mm and 6.0 mm.
Results
The tilt and decentration at the last follow-up were 2.43 ± 1.35° and 0.278 ± 0.160 mm, respectively. There was a significant positive correlation between tilt and decentration (r = 0.31, P = 0.046). No significant correlation was detected between implantable collamer lens decentration and internal higher-order aberrations (P > 0.05). The degree of implantable collamer lens rotation (3.11 ± 2.00°) was significantly associated with the vault (r = − 0.422, P = 0.01), while it was positively associated with the preoperative anterior chamber depth (r = 0.36, P = 0.034). No significant correlation was found between postoperative astigmatism and rotation (r = − 0.07, P = 0.351).
Conclusions
The implantable collamer lens V4c provides relatively stable misalignment and rotation after implantation. The ICL lens vault is a potential risk factor for postoperative implantable collamer lens rotation. The absolute value of decentration and tilt was relatively small, which showed no correlation with internal higher-order aberration in short-term observation.
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Funding
The study was supported by the Tianjin Health Science and Technology Project (ZC20189), Tianjin Eye Hospital Science and Technology Foundation (YKYB2002), and Tianjin Key Medical Discipline (Specialty) Construction Project.
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Ping-hui Wei and Jun Li contributed equally to this study and should be considered co-first authors. Pinghui Wei and Jun Li analyzed the data and wrote the manuscript. The data collection was done by Xiao-ling Jiao and Zhe Yu. Jun Li and Hui Song made manuscript revisions, conceived, and supervised the study.
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This study was approved by the ethics committee of the Tianjin Eye Hospital Review Board.
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Wei, Ph., Li, J., Jiao, Xl. et al. Short-term clinic observation of misalignment and rotational stability after implantable collamer lens implantation. Graefes Arch Clin Exp Ophthalmol 261, 1473–1481 (2023). https://doi.org/10.1007/s00417-022-05929-7
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DOI: https://doi.org/10.1007/s00417-022-05929-7