# Numerical Simulation on Corneal Surface Behavior Applying Luminous Beam Levels
## 1 Introduction
Finite element analysis was performed based on intraocular pressure; a study of intraocular forward pressure estimates the corneal displacement when the extraction procedure is carried out. Intracellular approaches reveal less impact on collagen layers [16]. In 2018, an eye model was developed to analyze the stress generated by intraocular pressure; the model focuses on a correlation between eyes with and without glaucoma, which tend to stiffness. The aim is to estimate the pathophysiology of glaucoma by identifying possible risk factors [17]. In 2023, biological tissue in a finite element model was developed, taking into consideration type of mesh, mechanical properties and compressive loads. The aim was to remodel the soft tissue of the liver under a pathogenesis, considering hyperelasticity and viscoelasticity as main properties for the numerical solution to analyze the structural behavior; results show an approach of the deformations through a fractal method in the surface of the liver [18]. Research by [PERSON] focused on corneal biomechanical and optical behavior, applying the FEM, and proposes a step-by-step methodology to reconstruct a model in the different parts and layers [19]. The primary considerations for realizing this numerical analysis are about the type of material. The visual organ is viscoelastic, considered a material capable of absorbing energy, deforming to its original state, and dissipating much of it [20]. In addition, the mechanical properties of its tissues, the human organ is said to be hyperelastic, anisotropic, and nonlinear due to its unique properties. Therefore, a mathematical model capable of satisfying the analysis, the Ogden model, was proposed to be used [21]. The focus of the work was to analyze the cornea and its damage. It is essential to consider the distinctive properties of the cornea for reliable analysis, such as elasticity, creep, relaxation, and hysteresis [22]. Before performing the investigation, it is essential to note that light must be considered from its purest part, an electromagnetic wave. The energy emitted by the photon is considered, using Planck's constant, the speed of light, and the wavelength of the emitter itself [23]. [PERSON], [PERSON] developed a methodology analyzing the behavior of tissuesand bones, replicating in an experimental test bench the movements of a rib of the human body in the breathing process; results show the characterization of the force and strain and the main considerations when parts of the human body are used under compressive stress [24]. [PERSON] investigated the mechanical properties of bone cement material without porosity to carry out a FEA analysis to study the structural stability and stress behavior in the material; outcomes allow the quantification of the porosity effect of the calcium phosphate to develop improvements while applying strontium nitrate [25]. This research aims to analyze the behavior in the eyeball's corneal surface when prolonged luminous beams irradiate it at a minimum distance. A three-dimensional model of the human visual organ is constructed, based on accurate dimensions from the PENTACAM(r) study, and supported by the clinical literature; through a numerical simulation, it is possible to establish the requirements to configure and represent the study cases of the biological material. The results show an approach quantifying the displacements on the corneal surface due to different light beams' exposition.