Distribution of static and dynamic cyclotorsion and influencing factors in FS-LASIK

Back to news list

Source: Frontiers Medicine

Original: https://www.frontiersin.org/articles/10.3389/fmed.2025.1614717...

Published: 2026-01-30T00:00:00Z

The study evaluated static cyclotorsion (SCC) and dynamic cyclotorsion (DCC) in 196 patients (392 eyes) with refractive errors undergoing FS-LASIK surgery using the IntraLase femtosecond laser for corneal flap and the AMARIS excimer laser for ablation. SCC was successfully registered in 80.6% of eyes, with thin corneal lobe (OR = 0.903, p < 0.01) and higher laser cavity temperature (OR = 1.26, p = 0.047) being risk factors for registration failure. There was no significant correlation between absolute SCC and preoperative or intraoperative variables (all p > 0.05). DCC was registered in 98.7% of eyes with a mean amplitude of 1.00 degrees (0.78–1.30 degrees). DCC amplitude was significantly correlated with age, equivalent spherical power, laser cavity temperature, and actual ablation time (all p < 0.05). A thin lobe and elevated laser cavity temperature increase the risk of SCC registration failure, while age, spherical power, temperature, and ablation time affect DCC.