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 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).

Publication DOI:
Divisions: College of Health & Life Sciences > School of Optometry > Optometry
College of Health & Life Sciences > School of Optometry > Optometry & Vision Science Research Group (OVSRG)
College of Health & Life Sciences
College of Health & Life Sciences > School of Optometry > Vision, Hearing and Language
Additional Information: © 2021 by the authors. Li‐ censee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and con‐ ditions of the Creative Commons At‐ tribution (CC BY) license (https://cre‐ Funding: This research was funded by INNOVATE UK under the Knowledge Transfer Partnership Project between Aston University and Rayner Intraocular Lenses Limited, grant number 11718. L.N.D. was funded, in part, by a research grant (27616) from the College of Optometrists, UK.
Uncontrolled Keywords: Biomechanical,Constitutive model,FEA,Hyper-elastic,Silicone rubber,Chemistry(all),Polymers and Plastics
Publication ISSN: 2073-4360
Last Modified: 19 Mar 2024 08:35
Date Deposited: 12 Nov 2021 15:42
Full Text Link:
Related URLs: https://www.mdp ... 4360/13/22/3916 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2021-11-12
Accepted Date: 2021-11-03
Authors: Wei, Huidong
Wolffsohn, James S. (ORCID Profile 0000-0003-4673-8927)
Gomes de Oliveria, Otavio
Davies, Leon N (ORCID Profile 0000-0002-1554-0566)



Version: Published Version

License: Creative Commons Attribution

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