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Related Concept Videos

Glaucoma: Overview01:25

Glaucoma: Overview

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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.
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Angle Closure Glaucoma: Treatment01:28

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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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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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As individuals age, their body's physiology evolves, affecting drug pharmacokinetics. The most apparent changes occur in the gastrointestinal tract, where an increase in gastric pH, a delay in gastric emptying, and a reduction in gastrointestinal motility are observed. Remarkably, these changes do not substantially modify the absorption of orally administered drugs, particularly those absorbed via passive diffusion.Transdermal drug delivery emerges as a highly viable method for older adults due...
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Related Experiment Video

Updated: Feb 28, 2026

Laser Capture Microdissection of Highly Pure Trabecular Meshwork from Mouse Eyes for Gene Expression Analysis
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Risk Factors for Rapid Glaucoma Disease Progression.

Thomas Chun Wai Chan1, Chandra Bala2, Anna Siu3

  • 1University of Sydney, Sydney, Australia.

American Journal of Ophthalmology
|June 19, 2017
PubMed
Summary

Rapid glaucoma progression is linked to cardiovascular disease, even with controlled intraocular pressure (IOP). Older age, lower central corneal thickness (CCT), and pseudoexfoliation also contribute to faster disease advancement.

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

Last Updated: Feb 28, 2026

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Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents
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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
  • Cardiovascular Medicine

Background:

  • Glaucoma is a leading cause of irreversible blindness.
  • Identifying risk factors for rapid glaucoma progression is crucial for timely intervention.
  • Systemic health may influence ocular disease progression.

Purpose of the Study:

  • To compare intraocular and systemic risk factors between rapid and non-rapid glaucoma progressors.
  • To investigate the association between cardiovascular disease and glaucoma progression rates.

Main Methods:

  • Retrospective case-control study involving 48 rapidly progressing and 486 non-rapidly progressing glaucoma eyes.
  • Analysis of clinical data including age, central corneal thickness (CCT), intraocular pressure (IOP), and medical history.
  • Statistical analysis using t-tests, Wald chi-squared, and binomial regression.

Main Results:

  • Rapid progressors were older, had lower CCT and baseline IOPs, and higher rates of pseudoexfoliation, disc hemorrhages, and ocular medication changes.
  • Cardiovascular disease and hypotension were significantly more prevalent in rapid progressors.
  • Cardiovascular disease increased the likelihood of rapid glaucoma progression by 2.33 times, independent of IOP.

Conclusions:

  • Cardiovascular disease is a significant risk factor for rapid glaucoma progression.
  • This association persists even when intraocular pressure is well-controlled.
  • Ophthalmologists should consider systemic health, particularly cardiovascular status, in managing glaucoma patients.