Investigation of Short-term Crystalline Lens Positional Shifts Following ICL Implantation Using SS-OCT Integrated With Multi-task Deep Learning.

Abstract

Purpose: To investigate the tilt and decentration of the crystalline lens shortly after Implantable Collamer Lens (ICL) implantation.

Methods: All enrolled patients underwent anterior segment swept-source optical coherence tomography (SS-OCT) both before and within 1 week after ICL surgery. A multitask network automatically conducted SS-OCT image segmentation and provided quantitative assessments of the crystalline lens's tilt and decentration. For data following a normal distribution, paired t-tests were performed, whereas for data not meeting normality assumptions, the Wilcoxon signed-rank test was used.

Results: The final data analysis included 42 eyes from 26 patients. No statistically significant difference was observed in the degree of crystalline lens tilt before and after ICL implantation (2.08 ± 0.07 vs 1.94 ± 0.08 degrees, P = .179), with both tilting temporally and demonstrating a significant positive correlation (r = 0.785, P < .001). The degree of postoperative crystalline lens decentration was significantly reduced compared to that before implantation (201 ± 64 vs 192 ± 92 µm, P = .0073), with the decentration predominantly in the upward direction, and demonstrating a strong positive correlation (r = 0.637, P < .001). Additionally, ICL tilt exhibited a strong positive correlation with both preoperative and postoperative lens tilt (r = 0.687, P < .001; r = 0.613, P < .001), as well as with ICL decentration (r = 0.512, P = .001).

Conclusions: SS-OCT combined with multi-task deep learning enables quantitative assessment of the spatial position of both the crystalline lens and ICL. Short-term observations indicate that ICL implantation impacts the position of the crystalline lens to varying extents. [J Refract Surg. 2025;41(6):e569-e574.].