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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...

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Related Experiment Video

Updated: Jun 18, 2026

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
07:11

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential

Published on: May 25, 2020

Arcuate cluster analysis in glaucoma perimetry.

P Asman1, A Heijl

  • 1Department of Ophthalmology, University of Lund, Malmö General Hospital, Malmö, Sweden.

Journal of Glaucoma
|November 19, 2009
PubMed
Summary
This summary is machine-generated.

Arcuate cluster analysis, which considers the shape of visual field defects, is more effective for detecting early glaucoma than traditional methods. This approach improves sensitivity to specific glaucomatous visual field loss patterns.

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Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents
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Last Updated: Jun 18, 2026

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
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Published on: May 25, 2020

Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents
10:10

Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents

Published on: February 15, 2022

Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Visual Neuroscience

Background:

  • Glaucomatous visual field defects typically manifest as contiguous areas of reduced sensitivity.
  • Understanding the anatomical basis of these defects, like the retinal nerve fiber layer, is crucial for early detection.

Purpose of the Study:

  • To evaluate the diagnostic value of recognizing arcuate cluster patterns in visual field defects.
  • To compare the efficacy of arcuate cluster analysis with traditional cluster analysis for glaucoma detection.

Main Methods:

  • Quantified cluster size using volume and surface area for arcuate and traditional clusters.
  • Analyzed static threshold visual fields from normal subjects and glaucoma patients.
  • Employed logistic regression for discriminating between normal and glaucomatous eyes.

Main Results:

  • Arcuate cluster analysis significantly improved discrimination between normal and glaucoma eyes compared to traditional methods.
  • Central and nasal arcuate clusters were particularly indicative of glaucoma.
  • Arcuate cluster volume provided better classification accuracy than arcuate surface area.

Conclusions:

  • Arcuate cluster analysis is a more sensitive method for detecting early glaucomatous visual field loss, especially in central and nasal areas.
  • This method effectively distinguishes glaucomatous defects from artifacts and non-specific disturbances.
  • Arcuate cluster volume analysis offers substantial advantages for early glaucoma recognition.