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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...
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

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, whereas...

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Related Experiment Video

Updated: May 30, 2026

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

[Relative afferent pupillary defect in glaucoma].

Karolina Skorkovská1, H Wilhelm, H Lüdtke

  • 1Augenklinik, Universitätsklinikum Tübingen. skorka@centrum.cz

Klinische Monatsblatter Fur Augenheilkunde
|August 18, 2011
PubMed
Summary
This summary is machine-generated.

Relative afferent pupillary defect (RAPD) is present in about one-third of primary open-angle glaucoma patients, particularly those with advanced visual field loss and asymmetry. The swinging-flashlight test is recommended for glaucoma diagnosis.

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Last Updated: May 30, 2026

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

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Published on: February 15, 2022

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

Published on: May 25, 2020

Glaucoma-inducing Procedure in an In Vivo Rat Model and Whole-mount Retina Preparation
08:30

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

Published on: March 12, 2016

Area of Science:

  • Ophthalmology
  • Neuroscience

Context:

  • Glaucoma diagnosis relies on visual field testing and optic nerve assessment.
  • Relative afferent pupillary defect (RAPD) is a potential indicator of optic nerve dysfunction in glaucoma.
  • The relationship between RAPD and glaucoma severity/asymmetry requires further elucidation.

Purpose:

  • To determine the frequency of RAPD in primary open-angle glaucoma (POAG).
  • To investigate the correlation between RAPD and the severity of visual field defects.
  • To assess the association between RAPD and visual field asymmetry in POAG patients.

Summary:

  • A retrospective study included 100 POAG patients; 34% exhibited RAPD.
  • Visual field analysis of 85 patients revealed significantly more advanced visual field loss (p < 0.01) and greater inter-eye asymmetry (p < 0.01) in those with RAPD.
  • Visual field asymmetry demonstrated good predictive value for RAPD (AUC = 0.81).

Impact:

  • RAPD is a common finding in approximately one-third of POAG cases.
  • The presence of RAPD correlates with more severe and asymmetric visual field defects.
  • Routine inclusion of the swinging-flashlight test in glaucoma diagnostics is advised to aid in identifying patients with significant visual field impairment.