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Related Concept Videos

Glaucoma: Overview01:25

Glaucoma: Overview

488
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...
488
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

378
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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Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

420
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...
420
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

5.5K
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,...
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Related Experiment Video

Updated: May 22, 2025

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

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Visual Field Progression in Glaucoma During COVID-19.

Bhavini Johri1, Lingam Vijaya, Trupti Sudhir Patil

  • 1Smt. Jadhavbai Nathmal Singhvee Glaucoma Services Medical Research Foundation, Sankara Nethralaya, Chennai, India.

Journal of Glaucoma
|March 12, 2025
PubMed
Summary
This summary is machine-generated.

Glaucoma patients experienced accelerated visual field progression during the COVID-19 pandemic. This worsening was linked to decreased medication adherence and availability, highlighting the need for continued monitoring.

Keywords:
COVID-19 pandemiclockdownrate of visual field progressionvisual field

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

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Area of Science:

  • Ophthalmology
  • Public Health

Background:

  • The COVID-19 pandemic presented unprecedented challenges to healthcare access and patient adherence.
  • Glaucoma management requires consistent monitoring and treatment to prevent irreversible vision loss.

Purpose of the Study:

  • To assess the impact of the COVID-19 pandemic on the rate of visual field progression in glaucoma patients.
  • To identify factors influencing visual field progression during the pandemic.

Main Methods:

  • A prospective hospital-based cohort study included 234 eyes of patients with glaucoma or ocular hypertension.
  • Patients had at least five pre-March 2020 and two post-pandemic Humphrey visual fields (24-2 SITA Standard).
  • Glaucoma Progression Analysis software was used for trend and event-based analysis; logistic regression identified progression factors.

Main Results:

  • Visual field progression rates significantly increased post-pandemic, with Mean Deviation (MD) and Visual Field Index (VFI) worsening.
  • 45.3% of eyes showed progression by trend or event analysis post-pandemic.
  • Pre-pandemic MD was a significant predictor of post-pandemic progression.

Conclusions:

  • Patients with glaucoma exhibited higher rates and proportions of visual field progression after the COVID-19 pandemic compared to before.
  • Reduced medication compliance and availability are likely contributors to this accelerated progression.
  • The findings underscore the critical importance of consistent glaucoma care and monitoring, even during public health crises.