Characterisation and Modelling of an Artificial Lens Capsule Mimicking Accommodation of Human Eyes

A synthetic material of silicone rubber was used to construct an artificial lens capsule (ALC) in order to replicate the biomechanical behaviour of human lens capsule. The silicone rubber was characterised by monotonic and cyclic mechanical tests to reveal its hyper-elastic behaviour under uniaxial...

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Autores principales:	Huidong Wei, James S. Wolffsohn, Otavio Gomes de Oliveira, Leon N. Davies
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	silicone rubber biomechanical hyper-elastic constitutive model FEA Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/3037591d9ba04ccf9a247e348a4c0c70
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id	oai:doaj.org-article:3037591d9ba04ccf9a247e348a4c0c70
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spelling	oai:doaj.org-article:3037591d9ba04ccf9a247e348a4c0c702021-11-25T18:48:17ZCharacterisation and Modelling of an Artificial Lens Capsule Mimicking Accommodation of Human Eyes10.3390/polym132239162073-4360https://doaj.org/article/3037591d9ba04ccf9a247e348a4c0c702021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/22/3916https://doaj.org/toc/2073-4360A synthetic material of silicone rubber was used to construct an artificial lens capsule (ALC) in order to replicate the biomechanical behaviour of human lens capsule. The silicone rubber was characterised by monotonic and cyclic mechanical tests to reveal its hyper-elastic behaviour under uniaxial tension and simple shear as well as the rate independence. A hyper-elastic constitutive model was calibrated by the testing data and incorporated into finite element analysis (FEA). An experimental setup to simulate eye focusing (accommodation) of ALC was performed to validate the FEA model by evaluating the shape change and reaction force. The characterisation and modelling approach provided an insight into the intrinsic behaviour of materials, addressing the inflating pressure and effective stretch of ALC under the focusing process. The proposed methodology offers a virtual testing environment mimicking human capsules for the variability of dimension and stiffness, which will facilitate the verification of new ophthalmic prototype such as accommodating intraocular lenses (AIOLs).Huidong WeiJames S. WolffsohnOtavio Gomes de OliveiraLeon N. DaviesMDPI AGarticlesilicone rubberbiomechanicalhyper-elasticconstitutive modelFEAOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3916, p 3916 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	silicone rubber biomechanical hyper-elastic constitutive model FEA Organic chemistry QD241-441
spellingShingle	silicone rubber biomechanical hyper-elastic constitutive model FEA Organic chemistry QD241-441 Huidong Wei James S. Wolffsohn Otavio Gomes de Oliveira Leon N. Davies Characterisation and Modelling of an Artificial Lens Capsule Mimicking Accommodation of Human Eyes
description	A synthetic material of silicone rubber was used to construct an artificial lens capsule (ALC) in order to replicate the biomechanical behaviour of human lens capsule. The silicone rubber was characterised by monotonic and cyclic mechanical tests to reveal its hyper-elastic behaviour under uniaxial tension and simple shear as well as the rate independence. A hyper-elastic constitutive model was calibrated by the testing data and incorporated into finite element analysis (FEA). An experimental setup to simulate eye focusing (accommodation) of ALC was performed to validate the FEA model by evaluating the shape change and reaction force. The characterisation and modelling approach provided an insight into the intrinsic behaviour of materials, addressing the inflating pressure and effective stretch of ALC under the focusing process. The proposed methodology offers a virtual testing environment mimicking human capsules for the variability of dimension and stiffness, which will facilitate the verification of new ophthalmic prototype such as accommodating intraocular lenses (AIOLs).
format	article
author	Huidong Wei James S. Wolffsohn Otavio Gomes de Oliveira Leon N. Davies
author_facet	Huidong Wei James S. Wolffsohn Otavio Gomes de Oliveira Leon N. Davies
author_sort	Huidong Wei
title	Characterisation and Modelling of an Artificial Lens Capsule Mimicking Accommodation of Human Eyes
title_short	Characterisation and Modelling of an Artificial Lens Capsule Mimicking Accommodation of Human Eyes
title_full	Characterisation and Modelling of an Artificial Lens Capsule Mimicking Accommodation of Human Eyes
title_fullStr	Characterisation and Modelling of an Artificial Lens Capsule Mimicking Accommodation of Human Eyes
title_full_unstemmed	Characterisation and Modelling of an Artificial Lens Capsule Mimicking Accommodation of Human Eyes
title_sort	characterisation and modelling of an artificial lens capsule mimicking accommodation of human eyes
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3037591d9ba04ccf9a247e348a4c0c70
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Characterisation and Modelling of an Artificial Lens Capsule Mimicking Accommodation of Human Eyes

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