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Related Concept Videos

Glaucoma: Overview01:25

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...
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
Open Angle Glaucoma: Treatment01:27

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: Treatment01:28

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...
Increased Intracranial Pressure ll: Pathophysiology01:29

Increased Intracranial Pressure ll: Pathophysiology

Increased intracranial pressure (ICP) refers to a potentially life-threatening rise in pressure inside the skull. This usually happens when there is a major change in the volume of brain tissue, blood, or cerebrospinal fluid (CSF) — the three components inside the skull. According to the Monro-Kellie doctrine, if the volume of one component increases, the volumes of the other components must decrease to maintain normal pressure. If this does not happen, ICP rises.The process often begins with...
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Alzheimer Disease ll: Pathophysiology

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Related Experiment Video

Updated: Jun 16, 2026

In Vivo Dynamics of Retinal Microglial Activation During Neurodegeneration: Confocal Ophthalmoscopic Imaging and Cell Morphometry in Mouse Glaucoma
12:48

In Vivo Dynamics of Retinal Microglial Activation During Neurodegeneration: Confocal Ophthalmoscopic Imaging and Cell Morphometry in Mouse Glaucoma

Published on: May 11, 2015

Glaucoma and Systemic Neurodegenerative Diseases: The Brain-Eye Continuum.

Priti Singh1, Samendra Karkhur1, Vidhya Verma1

  • 1Department of Ophthalmology, All India Institute of Medical Sciences, Bhopal, Madhya Pradesh, India.

Journal of Current Glaucoma Practice
|June 15, 2026
PubMed
Summary

Glaucoma, a leading cause of blindness, is increasingly understood as a neurodegenerative disorder with links to brain diseases like Alzheimer's and Parkinson's. The eye offers a unique window to study these interconnected neurological conditions.

Keywords:
Air puffAlzheimer's diseaseGlaucomaIntraocular pressureOptical coherence tomographyParkinson's diseaseRetinal imaging

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Related Experiment Videos

Last Updated: Jun 16, 2026

In Vivo Dynamics of Retinal Microglial Activation During Neurodegeneration: Confocal Ophthalmoscopic Imaging and Cell Morphometry in Mouse Glaucoma
12:48

In Vivo Dynamics of Retinal Microglial Activation During Neurodegeneration: Confocal Ophthalmoscopic Imaging and Cell Morphometry in Mouse Glaucoma

Published on: May 11, 2015

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08:30

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

Published on: March 12, 2016

Area of Science:

  • Ophthalmology
  • Neuroscience
  • Neurodegeneration

Background:

  • Glaucoma is a leading cause of irreversible blindness, characterized by retinal ganglion cell death and visual field loss.
  • Traditionally viewed as an intraocular pressure disease, glaucoma is now recognized as a complex neurodegenerative disorder with systemic implications.
  • Systemic neurodegenerative diseases like Alzheimer's, Parkinson's, and multiple sclerosis present significant global health challenges.

Purpose of the Study:

  • To explore the concept of the "eye as a window to the brain" in the context of glaucoma.
  • To highlight the overlap between glaucoma and systemic neurodegenerative diseases.
  • To emphasize the retina and optic nerve as key sites for studying neurodegeneration.

Main Methods:

  • Review of current understanding of glaucoma as a neurodegenerative optic neuropathy.
  • Discussion of the "eye as a window to the brain" concept.
  • Mention of advanced imaging techniques like optical coherence tomography (OCT) and OCT angiography (OCTA) for noninvasive study.

Main Results:

  • Glaucoma shares characteristics with systemic neurodegenerative diseases.
  • The eye provides a noninvasive model for studying neurodegenerative processes.
  • The brain-eye continuum is supported by the shared pathophysiology between glaucoma and other neurodegenerative conditions.

Conclusions:

  • Glaucoma is a neurodegenerative optic neuropathy with significant overlap with systemic brain diseases.
  • The "eye as a window to the brain" concept is crucial for understanding and potentially treating neurodegenerative disorders.
  • Further research into the brain-eye continuum may lead to novel diagnostic and therapeutic strategies for both glaucoma and other neurodegenerative conditions.