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Updated: Sep 26, 2025
09:03
Trabecular Meshwork Response to Pressure Elevation in the Living Human Eye
Published on: June 20, 2015
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Geometric Model and Numerical Study of Aqueous Humor Hydrodynamics in the Human Eye
Hao Tang1,2, Zhangrong Qin1, Binghai Wen1
1Guangxi Key Lab of Multi-Source Information Mining and Security, Guangxi Normal University, Guilin 541004, China.
Computational and Mathematical Methods in Medicine
|April 22, 2022
Summary
Aqueous humor flow dynamics in the eye were simulated using the lattice Boltzmann method. Key factors influencing intraocular pressure and flow, like corneal indentation and iris crypts, were identified.
Area of Science:
- Ophthalmology
- Biophysics
- Computational Fluid Dynamics
Background:
- Aqueous humor (AH) flow is crucial for ocular health, nutrient transport, and maintaining intraocular pressure (IOP).
- Dysregulation of AH dynamics is implicated in various ophthalmic diseases, necessitating a deeper understanding of its mechanisms.
Purpose of the Study:
- To investigate the complex dynamics of aqueous humor flow within the human eye.
- To analyze the impact of ocular morphology and fluid properties on AH flow patterns and IOP.
Main Methods:
- Utilized image processing for denoising and segmentation of anterior segment optical coherence tomography (AS-OCT) images.
- Developed a geometric eye model and an AH dynamics model based on the lattice Boltzmann (LB) method.
- Simulated AH flow under varied conditions, including different anterior chamber (AC) shapes, iris crypts, corneal indentation, trabecular meshwork (TM) permeability, AH secretion rate, and AH viscosity.
Main Results:
- Corneal indentation significantly reduces maximum AH flow velocity (17% reduction with 0.3-0.5 mm indentation).
- Asymmetrical ACs induce dual vortices in AH flow; iris crypts generate previously unreported small vortices.
- IOP is inversely related to TM permeability and directly related to AH secretion rate, showing low sensitivity to AH viscosity changes.
Conclusions:
- Ocular tissue morphology and physical properties critically influence AH flow dynamics.
- The LB model provides novel insights into AH flow patterns, including vortex formation in iris crypts.
- Understanding these dynamics is vital for diagnosing and managing ophthalmic conditions related to AH flow.
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