Characterisation and Modelling of an Artificial Lens Capsule Mimicking Accommodation of Human Eyes
1
College of Health and Life Sciences, Aston University, Birmingham B4 7ET, UK
2
Rayner Intraocular Lenses Limited, Worthing BN14 8AQ, UK
*
Authors to whom correspondence should be addressed.
Academic Editor: Iolanda De Marco
Polymers 2021, 13(22), 3916; https://doi.org/10.3390/polym13223916
Received: 28 September 2021
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Revised: 29 October 2021
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Accepted: 3 November 2021
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Published: 12 November 2021
(This article belongs to the Special Issue Advanced Polymers for Biomedical Applications)
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).
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Keywords:
silicone rubber; biomechanical; hyper-elastic; constitutive model; FEA
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MDPI and ACS Style
Wei, H.; Wolffsohn, J.S.; Gomes de Oliveira, O.; Davies, L.N. Characterisation and Modelling of an Artificial Lens Capsule Mimicking Accommodation of Human Eyes. Polymers 2021, 13, 3916. https://doi.org/10.3390/polym13223916
AMA Style
Wei H, Wolffsohn JS, Gomes de Oliveira O, Davies LN. Characterisation and Modelling of an Artificial Lens Capsule Mimicking Accommodation of Human Eyes. Polymers. 2021; 13(22):3916. https://doi.org/10.3390/polym13223916
Chicago/Turabian StyleWei, Huidong, James S. Wolffsohn, Otavio Gomes de Oliveira, and Leon N. Davies. 2021. "Characterisation and Modelling of an Artificial Lens Capsule Mimicking Accommodation of Human Eyes" Polymers 13, no. 22: 3916. https://doi.org/10.3390/polym13223916
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