Behaviour Of Higher-Order Aberration And Spherical Aberration In Femto-Lasik In Myopic Patients Treated With A New Generation Solid State Laser
Published 2025 - 43rd Congress of the ESCRS
Reference: PP15.17 | Type: Free paper | DOI: 10.82333/ry1t-af68
Authors: Yanzheng Song 1 , Fengju Zhang* 2 , Yuyan Huang 1 , Jiayu Li 1 , Yixin Zhang 1 , Yushan Xu 1 , Yifan Zhang 1
1Beijing Tongren Hospital,Beijing,China, 2Beijing Tongren Hospital,Beijing,China;Beijing AierIntech Eye Hospital,Beijing,China
Purpose
Evaluation of the results of higher-order aberration and spherical aberrations in Femto-LASIK treated with a new generation solid-state laser (AquariuZ)
Setting
A retrospective, single-site, consecutive case series. All patients received Femto-LASIK at the ORASIS Clinic and Swiss Research Foundation in Reinach, Switzerland.
Methods
38 patients with 76 eyes with myopic eyes underwent Femto-LASIK. The Femto-LASIK flap was 9.5 mm with hinge superior. The incision was made with an LDV Z8. A treatment zone of 6.5 mm was applied using an ablative solid-state laser. The higher order aberration (HOA), the RMS value and the spherical aberration (Z400) were measured and analysed in all patient eyes. The measuring range was 6 mm. Postoperative data were collected after 1 day, 1 week, 2 weeks, 1 month, 3 months and 6 months. Preoperatively, the HOA-RMS was 0.160±0.067 and the spherical aberration Z400 was 0.144±0.856.
Results
HOA-RMS increased significantly on postoperative day 1 to 0.261±0.130 (p=0.004), was 0.252±0.055 (p=0.003) at 1 week postoperatively, 0.240±0.075 (p=0.002) at 2 weeks postoperatively and 0.233±0.083 (p=0.008) at 4 weeks. After 6 weeks there was a reduction in HOA-RMS to 0.188±0.085 (p=0.14), after 3 months to 0.152±0.093 (p=0.67) and after 6 months to 0.137±0.067 (p=0.12). At Z400 there was a significant increase on postoperative day 1 to 0.207±0.163 (p=0.006), after 1 week to 0.212±0.066 (p=0.007), after 2 weeks to 0.191±0.094 (p=0.007), after 4 weeks to 0.187±0.094 (p=0.014). After 6 weeks there was a reduction to 0.163±0.099 (p=0.24), after 3 months to 0.116±±0.109 (p=0.149) and after 6 months to 0.089±0.082 (p=0.003).
Conclusions
It was found that the applied aspherically optimised application profile showed no significant difference in HOA-RMS and spherical aberration Z400 compared to preoperative values after 6 weeks to 6 months, i.e. after the end of follow-up observation in myopic patient eyes. In other words, the ablative solid-state laser does not induce HOA-RMS and spherical aberration Z400.