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Glaucoma: Overview

Glaucoma: Overview

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...

Open Angle Glaucoma: Treatment

Open Angle Glaucoma: Treatment

In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...

Angle Closure Glaucoma: Treatment

Angle Closure Glaucoma: Treatment

Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...

Electron Transport Chain: Complex I and II

Electron Transport Chain: Complex I and II

The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...

Mitochondrial Membranes

Mitochondrial Membranes

A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...

Mitochondria

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Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...

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Related Experiment Video

Updated: Jun 10, 2026

Determination of Mitochondrial Respiration and Glycolysis in Ex Vivo Retinal Tissue Samples

Determination of Mitochondrial Respiration and Glycolysis in Ex Vivo Retinal Tissue Samples

Published on: August 4, 2021

Mitochondrial dysfunction in glaucoma and emerging bioenergetic therapies.

Shanjean Lee¹, Nicole J Van Bergen, George Y Kong

¹Centre for Eye Research Australia, University of Melbourne, Department of Ophthalmology, Royal Victorian Eye and Ear Hospital, 32 Gisborne Street East, Melbourne, Victoria 3002, Australia.

Experimental Eye Research

|August 10, 2010

Summary

Glaucoma and mitochondrial optic neuropathies share retinal ganglion cell loss. Investigating mitochondrial function offers potential new treatments for vision loss in this neurodegenerative disease.

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Area of Science:

Ophthalmology
Neuroscience
Mitochondrial Biology

Background:

Glaucoma and mitochondrial optic neuropathies exhibit similarities, particularly the loss of retinal ganglion cells.
Retinal ganglion cells are highly susceptible to mitochondrial dysfunction due to their unique energetic demands.
Aging, a known risk factor for glaucoma, is also associated with declining mitochondrial function in neurons.

Purpose of the Study:

To explore the role of mitochondrial function in the pathogenesis of glaucoma.
To investigate potential therapeutic strategies targeting mitochondrial dysfunction for glaucoma treatment.

Main Methods:

Review of existing literature on glaucoma, mitochondrial optic neuropathies, and retinal ganglion cell biology.
Analysis of factors contributing to mitochondrial dysfunction in glaucoma, including genetic, mechanical, and environmental stressors.
Exploration of emerging therapeutic approaches focused on optimizing mitochondrial function.

Main Results:

Mitochondrial dysfunction is implicated in the pathogenesis of various mitochondrial diseases, including Leber's Hereditary Optic Neuropathy and Autosomal Dominant Optic Atrophy.
Factors such as genetic predisposition, elevated intraocular pressure (leading to mechanical stress and hypoperfusion), and oxidative stress can impair mitochondrial function in glaucoma.
The susceptibility of retinal ganglion cells to mitochondrial dysfunction is a key link between these conditions.

Conclusions:

Mitochondrial dysfunction is a significant factor in glaucoma pathogenesis, contributing to retinal ganglion cell loss and vision impairment.
Therapies aimed at improving mitochondrial function hold promise for slowing disease progression and preserving vision in glaucoma patients.
Further research into mitochondrial mechanisms in glaucoma is crucial for developing effective clinical treatments.