The lens capsule of the eye plays fundamental biomechanical roles in both normal physiological processes and clinical interventions. There has been modest attention given to the mechanical properties of this important membrane, however, and prior studies have focused on 1-D analyses of the data. We present results that suggest that the porcine anterior lens capsule has a complex, regionally dependent, nonlinear, anisotropic behavior. Specifically, using a subdomain inverse finite element method to analyze data collected via a new biplane video-based test system, we found that the lens capsule is nearly isotropic (in-plane) near the pole but progressively stiffer in the circumferential compared to the meridional direction as one approaches the equator. Because the porcine capsule is a good model of the young human capsule, there is strong motivation to determine if similar regional variations exist in the human lens capsule for knowledge of such complexities may allow us to improve the design of surgical procedures and implants.
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e-mail: jhumphrey@tamu.edu
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February 2007
Technical Papers
Regional Multiaxial Mechanical Properties of the Porcine Anterior Lens Capsule
G. David,
G. David
Department of Biomedical Engineering,
Texas A&M University
, College Station, TX 77843
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R. M. Pedrigi,
R. M. Pedrigi
Department of Biomedical Engineering,
Texas A&M University
, College Station, TX 77843
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M. R. Heistand,
M. R. Heistand
Department of Biomedical Engineering,
Texas A&M University
, College Station, TX 77843
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J. D. Humphrey
J. D. Humphrey
Department of Biomedical Engineering,
e-mail: jhumphrey@tamu.edu
Texas A&M University
, College Station, TX 77843
Search for other works by this author on:
G. David
Department of Biomedical Engineering,
Texas A&M University
, College Station, TX 77843
R. M. Pedrigi
Department of Biomedical Engineering,
Texas A&M University
, College Station, TX 77843
M. R. Heistand
Department of Biomedical Engineering,
Texas A&M University
, College Station, TX 77843
J. D. Humphrey
Department of Biomedical Engineering,
Texas A&M University
, College Station, TX 77843e-mail: jhumphrey@tamu.edu
J Biomech Eng. Feb 2007, 129(1): 97-104 (8 pages)
Published Online: June 26, 2006
Article history
Received:
January 16, 2006
Revised:
June 26, 2006
Citation
David, G., Pedrigi, R. M., Heistand, M. R., and Humphrey, J. D. (June 26, 2006). "Regional Multiaxial Mechanical Properties of the Porcine Anterior Lens Capsule." ASME. J Biomech Eng. February 2007; 129(1): 97–104. https://doi.org/10.1115/1.2401188
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