Initial Outcomes with Customized Myopic LASIK, Guided by Automated Ray Tracing Optimization: A Novel Technique

Autor:	Anastasios John Kanellopoulos
Rok vydání:	2020
Předmět:	medicine.medical_specialty Refractive error Visual acuity genetic structures medicine.medical_treatment Scheimpflug principle law.invention 03 medical and health sciences 0302 clinical medicine law Ophthalmology Medicine Dioptre Wavefront Keratometer business.industry LASIK medicine.disease eye diseases 030221 ophthalmology & optometry Ray tracing (graphics) sense organs medicine.symptom business 030217 neurology & neurosurgery Biomedical engineering
Zdroj:	Clinical Ophthalmology. 14:3955-3963
ISSN:	1177-5483
Popis:	Purpose Safety and efficacy of a novel automated ray tracing optimization in customization of excimer ablation in myopic LASIK. Methods In a consecutive case series, 25 patients (50 eyes) undergoing femtosecond-laser-assisted myopic LASIK were evaluated. The novel, artificial-intelligence platform initially calculates the ablation profile based on a model eye for each case, based on interferometry axial length data. Low- and high-order aberration calculation is performed by raytracing based on wavefront and Scheimpflug tomography measurements, all from a single diagnostic device. Visual acuity, refractive error, keratometry, topography, high-order aberrations and contrast sensitivity were evaluated, over six months follow-up. Results Change from pre- to 6 months post-operative: mean refractive error improved from -5.06 ± 2.54 diopters (D) (range -8.0 to -0.50 D) to -0.11 ± 0.09 D (range -0.25 to + 0.25); refractive astigmatism from -1.07 ± 0.91 D (range -4.25 to 0 D) to -0.15 ± 0.04 D (range -0.25 to 0); and topographic astigmatism from -1.65 ± 0.85 D to -0.26 ± 0.11 D (range -0.60 to 0). About 65% of eyes gained one line of vision and 38% 2 lines. Pre- to post-operative high-order aberration average: RMSh changed from 0.25 um to 0.35 um. Contrast sensitivity improved post-operatively. Conclusion We report safe and effective preliminary outcomes with a novel excimer laser customization by ray tracing optimization, for myopic LASIK treatments, employing several independent up-till-now diagnostics and 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::122143242209288ee310458445553e19 https://doi.org/10.2147/opth.s280560 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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