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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: May 20, 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

Multifocal visual evoked potentials for early glaucoma detection.

Jennifer S Weizer1, David C Musch, Leslie M Niziol

  • 1Departments of Ophthalmology and Visual Sciences, University of Michigan, 1000 Wall Street, Ann Arbor, MI 48105, USA. jweizer@umich.edu

Ophthalmic Surgery, Lasers & Imaging : the Official Journal of the International Society for Imaging in the Eye
|July 14, 2012
PubMed
Summary
This summary is machine-generated.

Multifocal visual evoked potentials (mfVEP) show promise in detecting early open-angle glaucoma. mfVEP cluster defects correlate with functional and anatomical markers of glaucomatous optic neuropathy.

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Last Updated: May 20, 2026

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Medical Imaging

Background:

  • Early open-angle glaucoma detection is crucial for preventing vision loss.
  • Current diagnostic methods have limitations in identifying early functional changes.

Purpose of the Study:

  • To evaluate the efficacy of multifocal visual evoked potentials (mfVEP) in detecting early open-angle glaucoma.
  • To compare mfVEP with other established glaucoma diagnostic tools.

Main Methods:

  • mfVEP and standard automated perimetry (SAP), short-wave automated perimetry, frequency-doubling technology perimetry, and optical coherence tomography (OCT) were performed.
  • 15 patients with suspected or early open-angle glaucoma and 19 healthy controls participated.
  • Statistical analysis included independent t tests and Fisher's exact test.

Main Results:

  • Monocular mfVEP cluster defects correlated with increased SAP pattern standard deviation.
  • Interocular mfVEP cluster defects were associated with superior nerve fiber layer thinning detected by OCT.
  • mfVEP demonstrated sensitivity in identifying glaucomatous changes.

Conclusions:

  • mfVEP detects functional and anatomical changes related to glaucomatous optic neuropathy.
  • mfVEP is a valuable tool for early detection and monitoring of open-angle glaucoma.