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Finite element analysis of cornea deformation and curvature change during the keratoplasty suturing process

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Abstract

Keratoplasty, which is cornea transplant surgery, is one of the treatment methods for patients with turbidity or keratitis. Recently, keratoplasty using a surgical robot was studied to increase precision. In this study, the effect of surgical factors on the deformation and curvature of the cornea were analyzed in order to improve the accuracy of keratoplasty and derive the optimal surgical factors using finite element method (FEM). Suturing tension and depth were selected as surgical factors. An FEM model, a constitutive equation, and boundary conditions were determined using experiments and reference data. Suturing tension significantly impacted deformation and curvature change, and suturing depth affected the position of the thread-cornea contact point. Both factors have a significant impact on a focal point in the retina and the patient’s visual acuity after keratoplasty.

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Acknowledgements

This work was supported by the Industrial Technology Innovation Program (No. 10048358) funded by the Ministry of Trade, Industry & Energy (MI, Korea).

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  1. Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Cheongam-ro, Nam-Gu, Pohang, Gyeongbuk, 37673, Korea

    Jong Won Baek & Seong Jin Park

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  1. Jong Won Baek
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Correspondence to Seong Jin Park.

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Baek, J.W., Park, S.J. Finite element analysis of cornea deformation and curvature change during the keratoplasty suturing process. Biomed. Eng. Lett. 9, 203–209 (2019). https://doi.org/10.1007/s13534-019-00100-4

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  • DOI: https://doi.org/10.1007/s13534-019-00100-4

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