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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...

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Related Experiment Video

Updated: Jun 26, 2026

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

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Published on: May 25, 2020

Diagnostic accuracy of pattern electroretinogram optimized for glaucoma detection.

Christopher Bowd1, Gianmarco Vizzeri, Ali Tafreshi

  • 1Hamilton Glaucoma Center and Department of Ophthalmology, University of California, San Diego, La Jolla, California 92037-0946, USA. cbowd@eyecenter.ucsd.edu

Ophthalmology
|January 27, 2009
PubMed
Summary
This summary is machine-generated.

The new PERGLA test can detect glaucoma, but it is not more effective than standard automated perimetry (SAP). Further refinement of the PERGLA normative database is needed for improved specificity in diagnosing glaucomatous optic neuropathy.

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Medical Diagnostics

Background:

  • Glaucomatous optic neuropathy (GON) is a leading cause of irreversible blindness.
  • Early detection of GON is crucial for timely intervention and vision preservation.
  • Standard automated perimetry (SAP) is a common method for glaucoma diagnosis.

Purpose of the Study:

  • To evaluate the diagnostic capability of the Pattern Electroretinogram optimized for Glaucoma Detection (PERGLA) paradigm.
  • To compare the PERGLA's ability to differentiate between healthy individuals and those with GON against SAP.

Main Methods:

  • A cross-sectional study involving 71 participants (142 eyes).
  • PERGLA recordings were obtained and compared with standard automated perimetry (SAP) results.
  • Diagnostic accuracy, including sensitivity, specificity, and AUCs, was assessed for both PERGLA and SAP.

Main Results:

  • PERGLA showed a sensitivity of 0.76 and specificity of 0.59.
  • SAP demonstrated higher diagnostic accuracy with sensitivity of 0.83 and specificity of 0.77.
  • Areas under the receiver operating characteristic curves (AUCs) for PERGLA amplitude (0.75) and phase (0.50) were comparable or lower than SAP (PSD: 0.83, MD: 0.78).

Conclusions:

  • PERGLA can distinguish between healthy and glaucomatous eyes.
  • PERGLA performance was not superior to SAP in diagnosing glaucoma.
  • The current PERGLA normative database requires optimization for improved specificity.