Biomechanical model of human cornea based on stromal microstructure

Studer, H; Larrea, X; Riedwyl, H; Büchler, P (2010). Biomechanical model of human cornea based on stromal microstructure. Journal of biomechanics, 43(5), 836--42. New York, N.Y.: Elsevier 10.1016/j.jbiomech.2009.11.021

Full text not available from this repository. (Request a copy)

The optical characteristics of the human cornea depends on the mechanical balance between the intra-ocular pressure and intrinsic tissue stiffness. A wide range of ophthalmic surgical procedures alter corneal biomechanics to induce local or global curvature changes for the correction of visual acuity. Due to the large number of surgical interventions performed every day, a deeper understanding of corneal biomechanics is needed to improve the safety of these procedures and medical devices. The aim of this study is to propose a biomechanical model of the human cornea, based on stromal microstructure. The constitutive mechanical law includes collagen fiber distribution based on X-ray scattering analysis, collagen cross-linking, and fiber uncrimping. Our results showed that the proposed model reproduced inflation and extensiometry experimental data [Elsheikh et al., Curr. Eye Res., 2007; Elsheikh et al., Exp. Eye Res., 2008] successfully. The mechanical properties obtained for different age groups demonstrated an increase in collagen cross-linking for older specimens. In future work such a model could be used to simulate non-symmetric interventions, and provide better surgical planning.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > Institute for Surgical Technology & Biomechanics ISTB [discontinued]

UniBE Contributor:

Studer, Harald and Büchler, Philippe

ISSN:

0021-9290

Publisher:

Elsevier

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:08

Last Modified:

06 Dec 2013 13:20

Publisher DOI:

10.1016/j.jbiomech.2009.11.021

Web of Science ID:

000276711700004

URI:

https://boris.unibe.ch/id/eprint/587 (FactScience: 199837)

Actions (login required)

Edit item Edit item
Provide Feedback