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Glaucoma: Overview

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Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...

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Related Experiment Video

Updated: Jun 28, 2025

Glaucoma-inducing Procedure in an In Vivo Rat Model and Whole-mount Retina Preparation

Glaucoma-inducing Procedure in an In Vivo Rat Model and Whole-mount Retina Preparation

Published on: March 12, 2016

Is Glaucoma a Two-Pressure-Related Optic Neuropathy? A Systematic Review and Meta-Analysis.

Tung Thanh Hoang^1,2,3, Bui Van Anh⁴, Prem Subramanian⁵

¹Hanoi Medical University, Department of Ophthalmology, Hanoi, Vietnam.

Turkish Journal of Ophthalmology

|April 22, 2024

Summary

Glaucoma patients exhibit higher intraocular pressure and translaminar pressure difference (TLPD), alongside lower cerebrospinal fluid pressure (CSFp). These findings suggest a significant correlation between TLPD and glaucoma development.

Keywords:

Glaucoma anslaminar cribrosa pressure gradient/difference cerebrospinal fluid pressure intracranial pressure intraocular pressure

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Area of Science:

Ophthalmology
Neuroscience

Background:

Glaucoma is a leading cause of irreversible blindness.
The role of translaminar pressure difference (TLPD) in glaucoma pathogenesis is increasingly recognized.

Approach:

A comprehensive literature review was performed using MEDLINE, Cochrane Eyes and Vision, and Google Scholar (2010-2022).
Search terms included 'glaucoma', 'intraocular pressure', 'translaminar cribrosa pressure gradient/difference', 'intracranial pressure', and 'cerebrospinal fluid pressure'.
Eight selected articles underwent meta-analysis.

Key Points:

Meta-analysis revealed significantly higher intraocular pressure in glaucoma groups (high-tension and normal-tension) compared to healthy controls.
Glaucoma patients demonstrated lower cerebrospinal fluid pressure (CSFp).
A greater TLPD was observed in individuals with glaucoma.

Conclusions:

Observed differences in CSFp and TLPD between glaucoma and healthy individuals suggest a potential link.
TLPD may play a crucial role in the pathophysiology of glaucoma.