ESCRS - FP15.03 - Lasik Surgery Using Ray Tracing Technology - A Real World Single Institution Experience.

Lasik Surgery Using Ray Tracing Technology - A Real World Single Institution Experience.

Published 2023 - 41st Congress of the ESCRS

Reference: FP15.03 | Type: Free paper | DOI: 10.82333/nmbc-6460

Authors: George He* 1 , Chandra Bala 2 , Anna Siu 3

1PersonalEYES,Sydney,Australia;Westmead Hospital,Westmead,Australia;University of Sydney,Sydney,Australia, 2PersonalEYES,Sydney,Australia;Macquarie University,Macquarie,Australia, 3PersonalEYES,Sydney,Australia

Purpose

To assess effectiveness of individualized ray tracing based laser in situ keratomileusis (ray trace LASIK) for correction of myopia in everyday clinical practice.

Setting

Sydney, Australia

Methods

In this retrospective chart review myopic eyes (range less -8.25D sphere; astigmatism 0 to -4.25 D) which were treated with ray tracing-based LASIK were
included. These patients underwent wavefront, tomography, and biometry assessment using the InnovEyes Sightmap (Alcon) diagnostic device. The ray tracing based algorithm (InnovEyes algorithm, Alcon) then generated an individualized 3D eye model and calculated a customized ablation profile for the LASIK procedure. Postoperative visual acuity, refractive error, higher-order aberrations were evaluated over 3 months.

Results

The procedure was performed on 200 patients (400 eyes). Mean preoperative manifest refraction spherical equivalent (MRSE) was -3.39±1.58D. At Month 3, uncorrected distance visual acuity (UDVA) was ≥20/20 in 100% of eyes, 98% of eyes were within 1 line of preoperative corrected distance visual acuity (CDVA), and 39% of eyes gained 1 line improvement in visual acuity. MRSE within ±0.5 D of the target was achieved in 96% of eyes. Half the patients (50.5%) achieved ≥20/12 UDVA with 89.3% of eyes achieving ≥20/16. Eight percent of patients achieved UDVA of 20/10.

Conclusions

Ray tracing-based LASIK (InnovEyes Alcon), was safe and effective for correction of myopia with and without astigmatism, with many eyes gaining lines of corrected and/or uncorrected vision compared with preoperative corrected values. Half the patients achieved ≥20/12.5 unaided vision and 8% achieved 20/10.