Abstract
Purpose
To assess the effect of capsular bend and axial length on the rotational stability of toric IOL.
Methods
The prospective study included patients with preexisting astigmatism that were implanted with Acrysof IQ Toric IOL. According to the pre‑operative axial length, all patients were divided into 2 groups: high myopia (AL ≥ 26 mm) group, and emmetropia or low to moderate myopia group (AL <26 mm). High-speed Swept-source Optical Coherence Tomography (SS-OCT) radial scanning was performed after pupil dilation to obtain the toric IOL axial orientation and capsular bending index (CBI) at 1-day, 1-week, 1-month and 3-month intervals postoperatively. The correlation between the rotation of toric intraocular lens and the axial length or CBI was subsequently analyzed.
Results
68 eyes of 57 patients were included in the research. The rotation of toric IOL within the high myopia group was greater than the control group (P = 0.001, 1month postoperative). Capsular contact with the IOL was delayed in highly myopic eyes, although the results were not statistically significant (P = 0.094, 1-month postoperatively). There was a positive correlation between the degree of rotation and axial length at the interval found between 1-week and 1-month after the operation (r = 0.333, P = 0.005). There was a significant negative correlation between the IOL rotational speed and CBI (P < 0.001). The regression equation was Y = −0.441*X + 1.712 (R2 = 0.323, P < 0.001).
Conclusion
There was a significant negative correlation between the IOL rotation speed and the CBI, while the influence of the axial length and capsular bending mainly occurred between one week and one month after the operation.
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Funding
This study was supported by Medical and Health Science and Technology Project of Zhejiang Province (2018KY538) and Zhejiang Provincial health leading talent project.
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PJC and DJC conceived and designed the presented study. BH, YLW and SYQ performed the data collection. PJC and DJC performed the analysis and wrote the manuscript. XXD and YEZ provided a critical review of the manuscript.
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Chang, P., Chen, D., Hu, B. et al. Effect of capsular bend on the rotational stability of toric intraocular lens. Eye 37, 480–485 (2023). https://doi.org/10.1038/s41433-022-01964-0
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DOI: https://doi.org/10.1038/s41433-022-01964-0
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