000126242 001__ 126242
000126242 005__ 20241125101137.0
000126242 0247_ $$2doi$$a10.1016/j.heliyon.2023.e13944
000126242 0248_ $$2sideral$$a133717
000126242 037__ $$aART-2023-133717
000126242 041__ $$aeng
000126242 100__ $$aTowler, Joseph
000126242 245__ $$aTypical localised element-specific finite element anterior eye model
000126242 260__ $$c2023
000126242 5060_ $$aAccess copy available to the general public$$fUnrestricted
000126242 5203_ $$aPurpose: The study presents an averaged anterior eye geometry model combined with a localised material model that is straightforward, appropriate and amenable for implementation in finite element (FE) modelling. Methods: Both right and left eye profile data of 118 subjects (63 females and 55 males) aged 22–67 years (38.5 ± 7.6) were used to build an averaged geometry model. Parametric representation of the averaged geometry model was achieved through two polynomials dividing the eye into three smoothly connected volumes. This study utilised the collagen microstructure x-ray data of 6 ex-vivo healthy human eyes, 3 right eyes and 3 left eyes in pairs from 3 donors, 1 male and 2 females aged between 60 and 80 years, to build a localised element-specific material model for the eye. Results: Fitting the cornea and the posterior sclera sections to a 5th-order Zernike polynomial resulted in 21 coefficients. The averaged anterior eye geometry model recorded a limbus tangent angle of 37° at a radius of 6.6 mm from the corneal apex. In terms of material models, the difference between the stresses generated in the inflation simulation up to 15 mmHg in the ring-segmented material model and localised element-specific material model were significantly different (p < 0.001) with the ring-segmented material model recording average Von-Mises stress 0.0168 ± 0.0046 MPa and the localised element-specific material model recording average Von-Mises stress 0.0144 ± 0.0025 MPa. Conclusions:
The study illustrates an averaged geometry model of the anterior human eye that is easy to generate through two parametric equations. This model is combined with a localised material model that can be used either parametrically through a Zernike fitted polynomial or non-parametrically as a function of the azimuth angle and the elevation angle of the eye globe. Both averaged geometry and localised material models were built in a way that makes them easy to implement in FE analysis without additional computation cost compared to the limbal discontinuity so-called idealised eye geometry model or ring-segmented material model.
000126242 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000126242 590__ $$a3.4$$b2023
000126242 592__ $$a0.617$$b2023
000126242 591__ $$aMULTIDISCIPLINARY SCIENCES$$b28 / 134 = 0.209$$c2023$$dQ1$$eT1
000126242 593__ $$aMultidisciplinary$$c2023$$dQ1
000126242 594__ $$a4.5$$b2023
000126242 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000126242 700__ $$0(orcid)0000-0001-5186-1837$$aConsejo, Alejandra$$uUniversidad de Zaragoza
000126242 700__ $$aZhou, Dong
000126242 700__ $$aRomano, Vito
000126242 700__ $$aLevis, Hannah
000126242 700__ $$aBoote, Craig
000126242 700__ $$aElsheikh, Ahmed
000126242 700__ $$aGeraghty, Brendan
000126242 700__ $$aAbass, Ahmed
000126242 7102_ $$12002$$2385$$aUniversidad de Zaragoza$$bDpto. Física Aplicada$$cÁrea Física Aplicada
000126242 773__ $$g9, 4 (2023), e13944 [20 pp.]$$pHeliyon$$tHeliyon$$x2405-8440
000126242 8564_ $$s13111583$$uhttps://zaguan.unizar.es/record/126242/files/texto_completo.pdf$$yVersión publicada
000126242 8564_ $$s1885061$$uhttps://zaguan.unizar.es/record/126242/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000126242 909CO $$ooai:zaguan.unizar.es:126242$$particulos$$pdriver
000126242 951__ $$a2024-11-22-12:01:14
000126242 980__ $$aARTICLE