March 2012
Volume 53, Issue 14
Free
ARVO Annual Meeting Abstract  |   March 2012
A Multilayer Model of the Eyeball for the Simulation of Choroidal and Retinal Detachments
Author Affiliations & Notes
  • Eva B. Voronkova
    Theoretical and Applied Mechanics, St Petersburg State University, St Petersburg, Russian Federation
  • Liudmila A. Karamshina
    Theoretical and Applied Mechanics, St Petersburg State University, St Petersburg, Russian Federation
  • Svetlana M. Bauer
    Theoretical and Applied Mechanics, St Petersburg State University, St Petersburg, Russian Federation
  • Footnotes
    Commercial Relationships  Eva B. Voronkova, None; Liudmila A. Karamshina, None; Svetlana M. Bauer, None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science March 2012, Vol.53, 4614. doi:
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      Eva B. Voronkova, Liudmila A. Karamshina, Svetlana M. Bauer; A Multilayer Model of the Eyeball for the Simulation of Choroidal and Retinal Detachments. Invest. Ophthalmol. Vis. Sci. 2012;53(14):4614.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose: : To study the intraocular pressure (IOP)-induced stress-strain state of a multi-layer eyeball model in view of possible choroidal or/and retinal detachment.

Methods: : The simulated eyeball was assumed as a composite spherical shell of two or three transversal isotropic layers. These layers represented the sclera, the choroid and the retina, respectively. Each of these layers had its own set of material properties (elastic moduli; thickness). 3D-theory of elasticity and finite element analysis were employed to predict the eyeball response to IOP-increase from 10 to 40 mm Hg. The results obtained for the multilayer shell were compared with those for one-layer shell with average elastic properties.

Results: : In the multilayer shell, the salient points were revealed for radial stresses and displacements. Circumferential stresses possessed jump discontinuities (gaps) near layer-to-layer contact lines. The more material properties differ from each other, the larger were the gaps. Such biomechanical effects may lead to internal detachments of the inner layers of the eye shell under increased intraocular pressure, e.g. a detachment of the choroid and the sclera.

Conclusions: : Elastic properties of the inner layers in the simulated eyeball contribute significantly to the stress distribution. Gaps in circumferential stresses could potentially cause choroidal and retinal detachments.

Keywords: computational modeling • sclera • retinal detachment 
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