The Stability Of Femtosecond-Assisted On-Axis Triplanar Clear Corneal Incision Paired With Opposite Arcuate Keratotomy Decreases Corneal Astigmatism At Implantable Collamer Lens Surgery
Published 2023 - 41st Congress of the ESCRS
Reference: PO0978 | Type: Free paper | DOI: 10.82333/dg9d-wv58
Authors: Jihong Zhou* 1 , Shaowei Li 2 , Guoli He 2 , Panzi Qiu 2 , Fengju Zhang 3
1Refractive Surgery,Beijing AierIntech Eye Hospital,Beijing,China;Beijing Tongren Hospital, Capital Medical University,Beijing,China, 2Refractive Surgery,Beijing AierIntech Eye Hospital,Beijing,China, 3Beijing Tongren Hospital, Capital Medical University,Beijing,China
Purpose
To investigate the stability of the on-axis triplanar clear corneal incision (TCCI) paired with opposite arcuate keratotomy (AK) by femtosecond-assisted (FS-assisted) in correcting astigmatism ranging from 0.75 to 3.00D when combined with Implantable Collamer Lens (ICL) surgery.
Setting
Design as a retrospective case series in Beijing AierIntech Eye Hospital
Methods
Patients who had ICL surgery combined with femtosecond-assisted on-axis TCCIs paired with AKs were reviewed between January 2017 and December 2020. Vector analysis of astigmatism was conducted with the Alpins method. Target-induced astigmatism (TIA), surgically induced astigmatism (SIA), difference vector (DV), correction index (CI), angle of error (AE), index of success (IOS), flattening index (FI) were evaluated. Generalized estimating equation (GEE) analysis was used to evaluate the result for 12 months follow-up.
Results
114 eyes of 67 patients were evaluated. The mean spherical equivalent refraction was -10.29±2.99D and -9.99±2.72D, and the TIA was -1.54 ± 0.50D and -1.59 ± 0.45D on the right and the left eye, respectively. At 12 months, CI was 0.87 and 0.89, and IOS was 0.38 and 0.40 for the right and left eyes, respectively. FI was 0.77 for both. The inter-eye correlation using GEE analysis showed no significant difference in SIA, corneal astigmatism, and cylinder for both eyes. (P = 0.498, 0.677, 0.749) Postoperatively, SIA changed at 3 months but was steady at 1 and 6 months (P = 0.003, 0.242, 0.306); corneal astigmatism was stable at 1 and 6 months (P = 0.695, P = 0.055) but slightly altered at 3 months (P = 0.028); the cylinder was stable. (P≥0.05)
Conclusions
Femtosecond-assisted on-axis TCCI paired with opposite AK effectively corrected low to moderate corneal astigmatism in eyes undergoing ICL surgery, and the procedure was safe and efficient. SIA, corneal astigmatism, and cylinder remained stable over 12 months.