Three-dimensional Spherical Symmetry Model Analysis of Corneal Deformation
In order to analyze the deformation response of the intact cornea to the physiological Intraocular pressures (IOPs), in this article, a spherical probe was used to indent the intact cornea and test the mechanical properties of cornea. Then, the JKR model of contact mechanics was used to get the corn...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Editorial Office of Journal of Taiyuan University of Technology
2021-11-01
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| Series: | Taiyuan Ligong Daxue xuebao |
| Subjects: | |
| Online Access: | https://tyutjournal.tyut.edu.cn/englishpaper/show-470.html |
| _version_ | 1827289429263253504 |
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| author | Qiaomei REN Zhipeng GAO Yongsheng LI Jing CHEN |
| author_facet | Qiaomei REN Zhipeng GAO Yongsheng LI Jing CHEN |
| author_sort | Qiaomei REN |
| collection | DOAJ |
| description | In order to analyze the deformation response of the intact cornea to the physiological Intraocular pressures (IOPs), in this article, a spherical probe was used to indent the intact cornea and test the mechanical properties of cornea. Then, the JKR model of contact mechanics was used to get the corneal equivalent elastic modulus value in different IOP. On this basis, the cornea was simplified as spherically symmetric model. The three dimensional strain values of corneal integrity on different IOP were calculated by elastic theory. Besides, the effects of corneal thickness and Poisson’s ratio on the strain values were discussed. The results show that the intact cornea presented tension and compressive strain responses to physiological intraocular pressure in the circumferential and radial directions, respectively. The corneal circumferential and radial strain increased with corneal thickness. With the increase of Poisson’s ratio, the circumferential strain decreased and the radial strain increased. The results suggested an antagonistic effect between corneal circumferential and radial strain, which made the whole cornea respond to the change of intraocular pressure with uniform volume deformation. The results of this study are helpful to quantitatively analyze the biomechanical properties of cornea under different intraocular pressures, and can provide a reference for the numerical modeling and simulation of corneal mechanics. |
| first_indexed | 2024-04-24T11:50:30Z |
| format | Article |
| id | doaj.art-b868ef50d7454a1dae2fcf5fdd6d55fd |
| institution | Directory Open Access Journal |
| issn | 1007-9432 |
| language | English |
| last_indexed | 2024-04-24T11:50:30Z |
| publishDate | 2021-11-01 |
| publisher | Editorial Office of Journal of Taiyuan University of Technology |
| record_format | Article |
| series | Taiyuan Ligong Daxue xuebao |
| spelling | doaj.art-b868ef50d7454a1dae2fcf5fdd6d55fd2024-04-09T08:04:09ZengEditorial Office of Journal of Taiyuan University of TechnologyTaiyuan Ligong Daxue xuebao1007-94322021-11-015261016102110.16355/j.cnki.issn1007-9432tyut.2021.06.0231007-9432(2021)06-1016-06Three-dimensional Spherical Symmetry Model Analysis of Corneal DeformationQiaomei REN0Zhipeng GAO1Yongsheng LI2Jing CHEN3College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaIn order to analyze the deformation response of the intact cornea to the physiological Intraocular pressures (IOPs), in this article, a spherical probe was used to indent the intact cornea and test the mechanical properties of cornea. Then, the JKR model of contact mechanics was used to get the corneal equivalent elastic modulus value in different IOP. On this basis, the cornea was simplified as spherically symmetric model. The three dimensional strain values of corneal integrity on different IOP were calculated by elastic theory. Besides, the effects of corneal thickness and Poisson’s ratio on the strain values were discussed. The results show that the intact cornea presented tension and compressive strain responses to physiological intraocular pressure in the circumferential and radial directions, respectively. The corneal circumferential and radial strain increased with corneal thickness. With the increase of Poisson’s ratio, the circumferential strain decreased and the radial strain increased. The results suggested an antagonistic effect between corneal circumferential and radial strain, which made the whole cornea respond to the change of intraocular pressure with uniform volume deformation. The results of this study are helpful to quantitatively analyze the biomechanical properties of cornea under different intraocular pressures, and can provide a reference for the numerical modeling and simulation of corneal mechanics.https://tyutjournal.tyut.edu.cn/englishpaper/show-470.htmlintraocular pressureindentation testjkr-modelvolumetric straincornea |
| spellingShingle | Qiaomei REN Zhipeng GAO Yongsheng LI Jing CHEN Three-dimensional Spherical Symmetry Model Analysis of Corneal Deformation Taiyuan Ligong Daxue xuebao intraocular pressure indentation test jkr-model volumetric strain cornea |
| title | Three-dimensional Spherical Symmetry Model Analysis of Corneal Deformation |
| title_full | Three-dimensional Spherical Symmetry Model Analysis of Corneal Deformation |
| title_fullStr | Three-dimensional Spherical Symmetry Model Analysis of Corneal Deformation |
| title_full_unstemmed | Three-dimensional Spherical Symmetry Model Analysis of Corneal Deformation |
| title_short | Three-dimensional Spherical Symmetry Model Analysis of Corneal Deformation |
| title_sort | three dimensional spherical symmetry model analysis of corneal deformation |
| topic | intraocular pressure indentation test jkr-model volumetric strain cornea |
| url | https://tyutjournal.tyut.edu.cn/englishpaper/show-470.html |
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