Customized Myopic Lasik Treatments With A Novel Automated Software By Alcon: An Observational Single-Arm Consecutive Case Series

Published 2022 - 40th Congress of the ESCRS

Reference: FPM03.08 | Type: Free paper | DOI: 10.82333/dsxb-p308

Authors: Anastasios John Kanellopoulos ¹ , Flavia Tzani ² , Dimitrios Machairas* ³

¹ophthalmology,LaserVision Ambulatory Eye Surgery Unit,Athens,Greece;ophthalmology,NYU med School,New York,United States, ²Ophthalmology,LaserVision Ambulatory Eye Surgery Unit,Athens,Greece, ³ophthalmology,LaserVision Ambulatory Eye Surgery Unit,Athens,Greece

Purpose

To evaluate the safety and efficacy of a novel automated ray-tracing optimization in customization of excimer ablation in myopic LASIK.

Setting

Laservision.gr Clinical and Research Institute, Athens, Greece investigator initiated study 59917561 sponsored by Alcon Greece

Methods

Observational consecutive case series; 20 consecutive myopic InnovEyes LASIK treatments (40 eyes). All qualifying cases were treated with LASIK and the InnovEyes suggested low order (refraction) and high order aberrations.The ablation profile is initially calculated based on a 3D model eye for each case. Optical coherence interferometry captures axial length data, and low and high order aberrations calculation is performed by ray-tracing based on wavefront and Scheimpflug tomography measurements, all from a single diagnostic device, InnovEyes sightmap. Visual Acuity, refractive error, keratometry, topography, high order aberrations and contrast sensitivity were evaluated, over six a month follow-up.

Results

At the three month follow-up, the change from pre- to post-operative values were: mean refractive error improved from -4.38 ± 2.54 diopters (D) (range -9.75 to -1.25 D) to +0.11 ± 0.19 D; Refractive astigmatism from -0.76 ± 0.91 D (range -2.75 to 0 D) to -0.13 ± 0.16 D, topographic astigmatism from -1.16 ± 0.64 D (range -0.2 to -2.8) to -0.47 ± 0.11 D. 82.5% of eyes gained one line of vision and 17.5% 2 lines. Contrast sensitivity improved postoperatively as an average.

Conclusions

We report safety and efficacy preliminary outcomes with a novel excimer laser customization by ray tracing optimization, for myopic LASIK treatments, employing axial length, wavefront and corneal tomography measurements captured from one single device to produce a customized eye model reference for each case. It bears the potential advantage through total eye aberration data and ray tracing refraction calculation to offer improved and more predictable visual outcomes.