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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...
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 l: Introduction01:14

Increased Intracranial Pressure l: Introduction

Intracranial hypertension is a sustained elevation of intracranial pressure (ICP) above 22 mm Hg. In supine adults, normal ICP is ~7–15 mm Hg.The rigid, nonexpandable cranium contains three components—brain tissue, blood, and cerebrospinal fluid (CSF)—that total ~1,700 mL in a typical adult: 1,400 mL brain (~80%), 150 mL blood (~10%), and 150 mL CSF (~10%). According to the Monro–Kellie doctrine, total intracranial volume is effectively fixed. When one component expands, CSF and venous blood...
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...
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...

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Related Experiment Video

Updated: Jun 9, 2026

Translaminar Autonomous System Model for the Modulation of Intraocular and Intracranial Pressure in Human Donor Posterior Segments
08:55

Translaminar Autonomous System Model for the Modulation of Intraocular and Intracranial Pressure in Human Donor Posterior Segments

Published on: April 24, 2020

[Normal tension glaucoma].

Vasile Potop, Marieta Dumitrache, Alina Ciocalteu

    Oftalmologia (Bucharest, Romania : 1990)
    |September 11, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Normal tension glaucoma presents diagnostic and therapeutic challenges, often diagnosed by excluding other conditions. Further investigation may reveal underlying general pathologies contributing to this unique glaucoma type.

    More Related Videos

    Glaucoma-inducing Procedure in an In Vivo Rat Model and Whole-mount Retina Preparation
    08:30

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

    Published on: March 12, 2016

    Related Experiment Videos

    Last Updated: Jun 9, 2026

    Translaminar Autonomous System Model for the Modulation of Intraocular and Intracranial Pressure in Human Donor Posterior Segments
    08:55

    Translaminar Autonomous System Model for the Modulation of Intraocular and Intracranial Pressure in Human Donor Posterior Segments

    Published on: April 24, 2020

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

    Context:

    • Normal tension glaucoma (NTG) is a distinct glaucoma subtype with debated etiology, diagnosis, and treatment.
    • Diagnostic challenges in NTG necessitate the exclusion of other ocular and neurological disorders.

    Purpose:

    • To elucidate the diagnostic complexities and potential underlying pathologies of normal tension glaucoma.
    • To highlight the differential diagnostic process for normal tension glaucoma.

    Summary:

    • Diagnosis of NTG involves a process of elimination, including pachymetry, tonometric curves, and neurological assessments.
    • Brain imaging, such as MRI, may be employed in the diagnostic workup.
    • The condition may represent a manifestation of broader systemic pathological processes.

    Impact:

    • Improved understanding of NTG diagnosis and its potential links to general pathology.
    • Enhanced clinical approaches for identifying and managing normal tension glaucoma patients.