Axisymmetric Finite Element Modelling of the Human Lens Complex under Cataract Surgery
Cataract is a disease opacifying the crystalline, leading to a blurred vision and ultimately to blindness. With an aging population, the incidence of cataract is increasing, as well as the number of treatments. The solution available is its complete removal, followed by an implant of an intraocular...
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doaj-a35b914fe0994ffbbd33cf5a9f7898362021-04-16T23:00:43ZengMDPI AGSymmetry2073-89942021-04-011369669610.3390/sym13040696Axisymmetric Finite Element Modelling of the Human Lens Complex under Cataract SurgeryM. T. Cardoso0B. Feijóo1A. P. G. Castro2F. J. Ribeiro3P. R. Fernandes4IDMEC, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, PortugalDepartamento de Oftalmologia, Hospital da Luz, 1500-650 Lisbon, PortugalIDMEC, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, PortugalDepartamento de Oftalmologia, Hospital da Luz, 1500-650 Lisbon, PortugalIDMEC, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, PortugalCataract is a disease opacifying the crystalline, leading to a blurred vision and ultimately to blindness. With an aging population, the incidence of cataract is increasing, as well as the number of treatments. The solution available is its complete removal, followed by an implant of an intraocular lens (IOL). Although the post-operative complications on cataract surgeries have been decreasing in general, the bag-IOL complex dislocation is still an issue, probably being the most serious complication under this procedure. In this work, an axisymmetric Finite Element (FE) modelling strategy of the crystalline complex during the process of accommodation under cataract surgery is proposed. The goal was to understand the influence of biomechanical alterations promoted by the IOL on bag-IOL dislocation after surgery. An increase of force and stress in the zonules was verified in the pseudophakic eye compared to the complete eye, which could explain why zonules break years after surgery, leading to the bag-IOL dislocation. The axisymmetric FE model proposed in this work is innovative in this field, which still lacks detailed research, and can be an important complement for the clinical and biomechanical work on the crystalline complex.https://www.mdpi.com/2073-8994/13/4/696intraocular lenscapsular bagzonular fiberspseudophakic eyeaxisymmetric finite element modelling |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
M. T. Cardoso B. Feijóo A. P. G. Castro F. J. Ribeiro P. R. Fernandes |
spellingShingle |
M. T. Cardoso B. Feijóo A. P. G. Castro F. J. Ribeiro P. R. Fernandes Axisymmetric Finite Element Modelling of the Human Lens Complex under Cataract Surgery Symmetry intraocular lens capsular bag zonular fibers pseudophakic eye axisymmetric finite element modelling |
author_facet |
M. T. Cardoso B. Feijóo A. P. G. Castro F. J. Ribeiro P. R. Fernandes |
author_sort |
M. T. Cardoso |
title |
Axisymmetric Finite Element Modelling of the Human Lens Complex under Cataract Surgery |
title_short |
Axisymmetric Finite Element Modelling of the Human Lens Complex under Cataract Surgery |
title_full |
Axisymmetric Finite Element Modelling of the Human Lens Complex under Cataract Surgery |
title_fullStr |
Axisymmetric Finite Element Modelling of the Human Lens Complex under Cataract Surgery |
title_full_unstemmed |
Axisymmetric Finite Element Modelling of the Human Lens Complex under Cataract Surgery |
title_sort |
axisymmetric finite element modelling of the human lens complex under cataract surgery |
publisher |
MDPI AG |
series |
Symmetry |
issn |
2073-8994 |
publishDate |
2021-04-01 |
description |
Cataract is a disease opacifying the crystalline, leading to a blurred vision and ultimately to blindness. With an aging population, the incidence of cataract is increasing, as well as the number of treatments. The solution available is its complete removal, followed by an implant of an intraocular lens (IOL). Although the post-operative complications on cataract surgeries have been decreasing in general, the bag-IOL complex dislocation is still an issue, probably being the most serious complication under this procedure. In this work, an axisymmetric Finite Element (FE) modelling strategy of the crystalline complex during the process of accommodation under cataract surgery is proposed. The goal was to understand the influence of biomechanical alterations promoted by the IOL on bag-IOL dislocation after surgery. An increase of force and stress in the zonules was verified in the pseudophakic eye compared to the complete eye, which could explain why zonules break years after surgery, leading to the bag-IOL dislocation. The axisymmetric FE model proposed in this work is innovative in this field, which still lacks detailed research, and can be an important complement for the clinical and biomechanical work on the crystalline complex. |
topic |
intraocular lens capsular bag zonular fibers pseudophakic eye axisymmetric finite element modelling |
url |
https://www.mdpi.com/2073-8994/13/4/696 |
work_keys_str_mv |
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