Outcomes Of A Novel Method For Vector Planning In Small Incision Lenticule Extraction For Myopic Astigmatism
Published 2023 - 41st Congress of the ESCRS
Reference: PO0945 | DOI: 10.82333/bxg9-ss65
Authors: Byunghoon Chung* 1 , David SY Kang 1 , Smauel Arba-Mosquera 2 , Tae-im Kim 3
1Eyereum Eye Clinic,Seoul,Korea, Republic Of, 2Schwind eye tech solutions,Kleinostheim,Germany, 3Ophthalmology,Yonsei University College of Medicin,Seoul,Korea, Republic Of
To compare clinical outcomes of small-incision lenticule extraction (SMILE) between the conventional and the novel method for vector planning for myopic astigmatism with high ocular residual astigmatism (ORA).
Yonsei University College of Medicine and Eyereum Eye Clinic, Seoul, Republic of Korea
Patients with myopic astigmatism and ORA of 0.75 diopters (D) or greater were randomized into the conventional or the novel vector planning group and underwent SMILE without applying any nomogram for cylinder correction. Visual acuity, MR, corneal topography, and corneal aberration were measured preoperatively and postoperatively.
The study included 100 patients (114 eyes): 50 eyes in the conventional and 50 eyes in the novel vector planning group. The mean uncorrected and corrected distance visual acuity, postoperative refractive cylinder, corneal astigmatism, ORA, safety and efficacy indices were comparable between the 2 groups. The percentage of patients with the achieved refractive correction within ± 0.25D to the attempted correction and the amount of corneal spherical aberration induction was significantly lower in the novel vector planning group (P = 0.04 and 0.03, respectively).
In myopic astigmatism with high ORA, the novel method for the vector planning showed comparable outcomes compared to the conventional method. However, the novel vector planning showed more predictable refractive outcomes and less corneal spherical aberrations induction.