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Biomechanical Assessment of the Iris in Relation to Angle-Closure Glaucoma: A Multi-scale Computational Approach

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Computer Methods, Imaging and Visualization in Biomechanics and Biomedical Engineering (CMBBE 2019)

Part of the book series: Lecture Notes in Computational Vision and Biomechanics ((LNCVB,volume 36))

Abstract

The abnormalities in the iris shape and deformation could cause closure of the space between the iris and cornea. Such closure may lead to development of certain types of glaucoma, a mysterious disease causing irreversible blindness. As such, the mechanical response of the iris and its deformation have been studied extensively in the context of glaucoma. The collagen fibrils of the iris stroma provide support while undergoing continuous large mechanical deformation. The relationship between micrometer-scale and macro-scale mechanical environment, however, remains unknown. We have used a multiscale computational framework, linking the volume-averaged stress in micrometer-scale representative volume elements to a macro-scale finite-element continuum. We fitted the multiscale model response to experimental data obtained from uniaxial tension tests of intact irides. We hope to employ our model in pathophysiological states of the iris to understand how the microscale deformation may differ in glaucomatous eyes as compared to the healthy controls.

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Acknowledgement

Computations were facilitated by a supercomputing resource grant from the Ohio Supercomputer Center (Columbus, OH). Funding for this study was provided in part by a grant from BrightFocus Foundation (G2018177).

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Authors and Affiliations

  1. Department of Biomedical Engineering, The University of Akron, Akron, OH, 44304, USA

    Vineet S. Thomas, Sam D. Salinas & Rouzbeh Amini

  2. Department of Engineering, East Carolina University, Greenville, NC, 27858, USA

    Anup D. Pant

  3. Department of Ophthalmology, Mayo Clinic, Jacksonville, FL, 32224, USA

    Syril K. Dorairaj

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  1. Vineet S. Thomas
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  2. Sam D. Salinas
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  4. Syril K. Dorairaj
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  5. Rouzbeh Amini
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Corresponding author

Correspondence to Rouzbeh Amini .

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Editors and Affiliations

  1. Andrew Walz Professor of Mechanical Engineering and Professor of Biomedical Engineering, Columbia University, New York, NY, USA

    Gerard A. Ateshian

  2. Department of Mechanical Engineering, Columbia University, New York, NY, USA

    Kristin M. Myers

  3. Department of Mechanical Engineering, University of Porto, Porto, Portugal

    João Manuel R. S. Tavares

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Thomas, V.S., Salinas, S.D., Pant, A.D., Dorairaj, S.K., Amini, R. (2020). Biomechanical Assessment of the Iris in Relation to Angle-Closure Glaucoma: A Multi-scale Computational Approach. In: Ateshian, G., Myers, K., Tavares, J. (eds) Computer Methods, Imaging and Visualization in Biomechanics and Biomedical Engineering. CMBBE 2019. Lecture Notes in Computational Vision and Biomechanics, vol 36. Springer, Cham. https://doi.org/10.1007/978-3-030-43195-2_38

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  • DOI: https://doi.org/10.1007/978-3-030-43195-2_38

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