A numerical model of capsulorhexis to assess the relevance of size and position of the rhexis on the IOL decentering and tilt

Finite element models of human crystalline capsular bag and zonular fibers are used to estimate the mechanical response of the capsule to the presence of a C-loop Intra-Ocular Lens (IOL) after cataract surgery, to assess the influence of capsulorhexis size, shape and location on IOL decentration and...

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Bibliographic Details
Published in:Journal of the mechanical behavior of biomedical materials 2021-02, Vol.114, p.104170-104170, Article 104170
Main Authors: Cornaggia, Aram, Clerici, Laura M., Felizietti, Marta, Rossi, Tommaso, Pandolfi, Anna
Format: Article
Language:English
Subjects:
Capsulorhexis
Humans
Lens Implantation, Intraocular
Lenses, Intraocular
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Summary:Finite element models of human crystalline capsular bag and zonular fibers are used to estimate the mechanical response of the capsule to the presence of a C-loop Intra-Ocular Lens (IOL) after cataract surgery, to assess the influence of capsulorhexis size, shape and location on IOL decentration and tilt. The model includes, in the anterior capsule, a hole with variable size, shape and position, which represents the rhexis obtained in a manual or laser-assisted manner. The IOL is not explicitly modelled, but its action is reproduced by means of a set of elastic ties, connecting the opposite sides of the bag and exerting the force corresponding to an expanded IOL. Numerical simulations show that IOL decentration and tilt are not related to the size of the rhexis. A decentered rhexis induces IOL decentration
ISSN:1751-6161
1878-0180
DOI:10.1016/j.jmbbm.2020.104170