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  4. Simulation of the Outflow Pathway in the Human Eye
 
conference paper

Simulation of the Outflow Pathway in the Human Eye

Roy, S.  
•
Schmocker, A.
•
Reymond, P.
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2010
World Congress On Medical Physics And Biomedical Engineering, Vol 25, Pt 4: Image Processing, Biosignal Processing, Modelling And Simulation, Biomechanics
World Congress on Medical Physics and Biomedical Engineering

The eye structure and function highly depend on the stability of the intraocular pressure (IOP). Glaucoma is an ophthalmic disease that can potentially lead to irreversible blindness. Glaucoma results from optic nerve damages due to persistent elevated IOP. Aqueous humor production, drainage and resistance to egress are the key elements that determine the IOP. After travelling from the posterior to the anterior chamber, the aqueous humor passes through the trabecular meshwork to collect into Schlemm's canal, where collector channels eventually drain into the venous system. The highest resistance to egress is located at the outer portion of the trabecular meshwork and inner wall of Schlemm's canal. In this work we intended to simulate the basic geometry and physiological parameters that determine the aqueous humor dynamics and the IOP values. A 3-D modeling of the human eye was made based on histology. Great attention was given to details in the geometry of the trabeculum, Schlemm's canal and the collector channels. Using Matlab program, the pressure distribution in the eye was computed. Flow was computed using Poisseuille's law. The 3-D modeling was meshed by ICEM Ansys before being implemented using Fluent 6.3. 2-D and 3-D meshes were obtained. The results were showing the pressure distribution from the posterior and anterior chambers, the trabeculum, Schlemm's canal and the collector channels. Most of the resistance to aqueous egress occurred at the level of the trabeculum and Schlemm's canal where the pressure drop was the greatest. Refinements in the mesh density would greatly enhance the quality of the modeling. In conclusion this simulation of the outflow pathway in the human eye provided interesting data about the pressure drop and the localization of the main resistance to aqueous egress.

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Type
conference paper
DOI
10.1007/978-3-642-03882-2_70
Web of Science ID

WOS:000300975300070

Author(s)
Roy, S.  
Schmocker, A.
Reymond, P.
Vardoulis, O.
Villarmarin, A.
Alkharfane, M.
Stergiopulos, N.  
Date Issued

2010

Publisher

Springer, 233 Spring Street, New York, Ny 10013, United States

Published in
World Congress On Medical Physics And Biomedical Engineering, Vol 25, Pt 4: Image Processing, Biosignal Processing, Modelling And Simulation, Biomechanics
ISBN of the book

978-3-642-03881-5

Series title/Series vol.

IFMBE Proceedings; 25

Start page

265

End page

268

Subjects

eye

•

outflow facility

•

glaucoma

•

intraocular pressure

•

Trabecular Meshwork

•

Aqueous-Humor

•

Follow-Up

•

Resistance

•

Glaucoma

Editorial or Peer reviewed

NON-REVIEWED

Written at

EPFL

EPFL units
LHTC  
Event nameEvent placeEvent date
World Congress on Medical Physics and Biomedical Engineering

Munich, GERMANY

Sep 07-12, 2009

Available on Infoscience
June 25, 2012
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/82370
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