Influence Of Crystalline Lens Diameter On Postoperative Iol Rotation

Centre Iridis Albi

This retrospective study included patients who underwent crystalline lens surgery with the EDOF IOL model 124MT (SAV-IOL, Switzerland) between July 2023 and December 2024. Postoperative rotational stability was systematically assessed at 1.5 to 3 months post-surgery through direct pupillary dilation and manual protractor measurement. Correlation analyses were conducted between postoperative IOL rotation and preoperative biometric parameters, with a specific focus on the lens diameter measured by anterior segment OCT Casia 2 (Tomey, Japan). Additional analyses included axial length (AL), lens thickness (LT), anterior chamber depth (ACD), corneal astigmatism, white-to-white (W2W) distance, and patient demographics.

A total of 348 eyes were analyzed. The mean postoperative rotation was 2.68 ± 2.38°, with a minimum of 0.0° and a maximum of 17.0°. The median rotation was 2.0°, with an interquartile range (IQR) of 1.0° to 4.0°. Statistical analysis revealed a poor negative correlation between postoperative rotation and lens diameter (ρ = -0.0033; r² = 0.003; p = 0.952). Other preoperative biometric parameters, including AL, LT, ACD, corneal astigmatism, and W2W distance, also showed no significant correlation with rotational stability.

The Crystalline lens diameter measured by anterior segment OCT does not appear to influence the postoperative rotational stability of the EDOF IOL in the capsular bag. Additionally, no significant impact of other biometric parameters on rotational behavior was observed. These results suggest that lens diameter, along with conventional biometric measurements, may not serve as reliable predictors for postoperative IOL rotation.