scholarly journals Clinical Method of Observing Changes in the Rate of Flow of Aqueous Humour in the Human Eye : II. In Glaucoma

1952 ◽  
Vol 36 (9) ◽  
pp. 499-505 ◽  
Author(s):  
D. Langley ◽  
R. K. Macdonald
Keyword(s):  
Aqueous Humour ◽  
Clinical Method ◽  
Human Eye

Modeling and simulation of aqueous humour flow in the human eye

2021 ◽  
Author(s):  
Caio Vinícius Schurgelies de Sá ◽  
André von Borries Lopes
Keyword(s):  
Modeling And Simulation ◽  
Aqueous Humour ◽  
Human Eye

scholarly journals Study on Aqueous Humour Hydrodynamics of Glaucoma Condition Using 3D Printed Model and Particle Image Velocimetry (PIV)

2021 ◽  
Vol 89 (1) ◽  
pp. 26-41
Author(s):  
Riyadhthusollehan Khairulfuaad ◽  
Norzelawati Asmuin ◽  
Ishkrizat Taib
Keyword(s):  
Particle Image Velocimetry ◽  
Fluid Flow ◽  
Aqueous Humour ◽  
Computational Analysis ◽  
Particle Image ◽  
Water Soluble ◽  
Silicon Rubber ◽  
Human Eye ◽  
Image Velocimetry ◽  
3D Printed

This study aims to explore the knowledge on fluid flow properties of the aqueous humour (AH), specifically on the anterior segment (AS) of the human eye for a medical condition called Glaucoma. The research objectives are to study on fluid flow characteristics of velocity and pressure of the AH on the AS of the eye using enlarged 3D printed model and computational analysis, and also to analyse the suitability of the 3D generated anterior AS in fluid flow analysis application on particle image velocimetry (PIV). Using polyvinyl alcohol (PVA) as a water-soluble 3D printing filament, a 3D model of the AS of the human eye was generated with SolidWorks 2018 and printed using Creality Ender 3. This printed model serves as the pattern for silicon rubber mould production using vacuum casting process. Analysis of AH flow hydrodynamics are conducted with computational analysis using ANSYS Workbench 19.2. Key findings support that use of PVA material suite the creation of specific shapes and patterns for 3D modelling applications alike, and silicon rubber moulding creates a non-reactive and long-lasting mould for PIV applications. Computational analysis findings support the use of the generated model for PIV applications. Overall, the study successfully supports the use of 3D printed model for PIV application and future work that can be induced include direct experimentation of the mould with PIV.

Forced Convection Mechanism Failure in the Eye Can Cause Cataract

2013 ◽  
Vol 334-335 ◽  
pp. 225-229 ◽  
Author(s):  
Humberto Dória Silva ◽  
E. Dória Silva ◽  
Luiz Cláudio Pereira Dória ◽  
Cristiana Pereira Dória ◽  
Cristiane Pereira Dória ◽  
...  
Keyword(s):  
Forced Convection ◽  
Trabecular Meshwork ◽  
Transport Mechanism ◽  
Aqueous Humour ◽  
Excess Volume ◽  
Genetic Factors ◽  
Scientific Literature ◽  
Senile Cataract ◽  
Human Eye ◽  
Biochemical Constituents

Although the exact causes for presbyopia are not known with certainty, there is the general understanding that it is associated with aging. This is one of the major paradigms of science because the analysis of the symptoms observed during the treatment of presbyopia in the first author of this paper indicates that presbyopia is associated with metabolic dehydrated secretions that have accumulated in various parts of the eyes. As a process of accumulation it is not difficult to associate it statistically to aging. The metabolic secretions produced by the cells inside the human eye are accumulated simultaneously in the cornea, trabecular meshwork, in the lens and retina, subject only to its origin, however, the symptomatology is well characterized by the location of accumulation. Genetic factors are directly related to how the clumps of metabolic secretions occur and the accumulation form is very specific according to the movement of the eyes based on the activities performed by the patient, so any outcome is unpredictable. In this paper introduces the hypothesis that senile cataract may be caused by transport mechanism failure by forced convection of aqueous humour and metabolic mass produced by the lens cells. The evidence confirms the comparative interpretation of physiology and biochemical constituents of studies between old and young lenses published in scientific literature. Besides that the accumulation produces a loss of elasticity of the lens, due to excess volume and causes its opacity because the metabolic secretion is translucent. It shows evidence of the formation of floaters.

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