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Related Concept Videos

Glaucoma: Overview01:25

Glaucoma: Overview

1.1K
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...
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Open Angle Glaucoma: Treatment01:27

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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: Dec 25, 2025

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

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Pointwise Methods to Measure Long-term Visual Field Progression in Glaucoma.

Diana Salazar1, Esteban Morales1, Alessandro Rabiolo1,2

  • 1Glaucoma Division, Jules Stein Eye Institute, David Geffen School of Medicine, UCLA (University of California, Los Angeles).

JAMA Ophthalmology
|April 3, 2020
PubMed
Summary
This summary is machine-generated.

The glaucoma rate index (GRI) detects visual field progression in glaucoma earlier than guided progression analysis (GPA) or pointwise linear regression (PLR). This finding aids in timely treatment adjustments for glaucoma patients.

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Area of Science:

  • Ophthalmology
  • Medical Technology

Background:

  • Glaucoma visual field (VF) progression rates vary significantly among patients.
  • Accurate progression assessment is crucial for tailoring glaucoma treatment intensity and preventing unnecessary interventions.

Purpose of the Study:

  • To compare the efficacy of three pointwise methods—guided progression analysis (GPA), pointwise linear regression (PLR), and glaucoma rate index (GRI)—in estimating VF progression rates in glaucoma.
  • To evaluate the performance of these methods in detecting early signs of VF loss.

Main Methods:

  • A retrospective observational cohort study analyzed data from 729 eyes of 567 primary open-angle glaucoma patients with at least 6 reliable VFs and 3 years of follow-up.
  • VF progression estimates were calculated using GPA, PLR, and GRI.
  • Subgroup analyses were conducted on patients with likely VF progression and stability.

Main Results:

  • The glaucoma rate index (GRI) identified a higher proportion of progressing eyes (52.9%) compared to PLR (33.5%) and GPA (27.7%).
  • GRI detected progression significantly earlier (median 8.8 years) than PLR and GPA (both >16 years).
  • Hazard ratios indicated GRI was substantially more likely to detect progression than PLR or GPA.

Conclusions:

  • The glaucoma rate index (GRI) demonstrates superior ability to detect long-term visual field progression in glaucoma earlier than PLR or GPA.
  • Prospective studies are recommended to validate these findings and enhance the generalizability of the GRI method.