Establishing standardization guidelines for finite-element optomechanical simulations of refractive laser surgeries: an application to photorefractive keratectomy
Author
Fantaci, Benedetta
Calvo, Begoña
Barraquer, Rafael
Picó, Andrés
Ariza-Gracia, Miguel Ángel
Publication date
2024ISSN
2164-2591
Abstract
Purpose: Computational models can help clinicians plan surgeries by accounting for factors such as mechanical imbalances or testing different surgical techniques beforehand. Different levels of modeling complexity are found in the literature, and it is still not clear what aspects should be included to obtain accurate results in finite-element (FE) corneal models. This work presents a methodology to narrow down minimal requirements of modeling features to report clinical data for a refractive intervention such as PRK. Methods: A pipeline to create FE models of a refractive surgery is presented: It tests different geometries, boundary conditions, loading, and mesh size on the optomechanical simulation output. The mechanical model for the corneal tissue accounts for the collagen fiber distribution in human corneas. Both mechanical and optical outcome are analyzed for the different models. Finally, the methodology is applied to five patient-specific models to ensure accuracy. Results: To simulate the postsurgical corneal optomechanics, our results suggest that the most precise outcome is obtained with patient-specific models with a 100 µm mesh size, sliding boundary condition at the limbus, and intraocular pressure enforced as a distributed load. Conclusions: A methodology for laser surgery simulation has been developed that is able to reproduce the optical target of the laser intervention while also analyzing the mechanical outcome. Translational Relevance: The lack of standardization in modeling refractive interventions leads to different simulation strategies, making difficult to compare them against other publications. This work establishes the standardization guidelines to be followed when performing optomechanical simulations of refractive interventions.
Document Type
Article
Document version
Published version
Language
English
Subject (CDU)
617 - Surgery. Orthopaedics. Ophthalmology
Keywords
Biomecànica corneal
Òptica
Cirurgia refractiva làser
Finit simulacions d'elements
Biomecánica corneal
Óptica
Cirugía refractiva con láser
Finito simulaciones de elementos
Corneal biomechanics
Optics
Laser refractive surgery
Finite element simulations
Pages
19
Publisher
Association for Research in Vision and Ophthalmology
Collection
13; 5
Is part of
Translational Vision Science & Technology
Citation
Fantaci, Benedetta; Calvo, Begoña; Barraquer, Rafael [et al.]. Establishing standardization guidelines for finite-element optomechanical simulations of refractive laser surgeries: an application to photorefractive keratectomy. Translational Vision Science & Technology, 2024, 13(5), 11. Disponible en: <https://tvst.arvojournals.org/article.aspx?articleid=2793663>. Fecha de acceso: 3 jun. 2024. DOI: 10.1167/tvst.13.5.11
This item appears in the following Collection(s)
- Ciències de la Salut [740]
Rights
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by/4.0/