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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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Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

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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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Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

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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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Photoreceptors and Visual Pathways01:22

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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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Related Experiment Video

Updated: Jun 18, 2025

Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents
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Association Between Greater Social Vulnerability and Delayed Glaucoma Surgery.

Abdulla Shaheen1, Felipe A Medeiros1, Swarup S Swaminathan1

  • 1From the Department of Ophthalmology, Bascom Palmer Eye Institute (A.S., F.A.M., S.S.S.), University of Miami Miller School of Medicine, Miami, Florida, USA.

American Journal of Ophthalmology
|August 1, 2024
PubMed
Summary
This summary is machine-generated.

Social vulnerability and neighborhood deprivation delay glaucoma surgery. Higher Social Vulnerability Index (SVI) or Area Deprivation Index (ADI) scores were linked to longer times for patients to receive surgical intervention for glaucoma.

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Area of Science:

  • Ophthalmology
  • Public Health
  • Health Disparities

Background:

  • Glaucoma surgery timing is critical for vision preservation.
  • Known ocular risk factors for surgery exist, but neighborhood-level social risk factors' impact is unknown.
  • Social vulnerability and area deprivation indices are potential indicators of health disparities.

Purpose of the Study:

  • To investigate the association between Social Vulnerability Index (SVI) and Area Deprivation Index (ADI) scores and the timing of glaucoma surgical intervention.
  • To determine if neighborhood-level social risk factors influence the delay or acceleration of glaucoma surgery.

Main Methods:

  • Retrospective cohort study of adult open-angle glaucoma patients.
  • Utilized Bascom Palmer Glaucoma Repository data, including demographics, ocular characteristics, and perimetry.
  • Employed geocoded residence data and American Community Survey data to calculate SVI and ADI.
  • Performed univariable and multivariable survival analyses using accelerated failure time models.

Main Results:

  • Higher intraocular pressure, faster visual field progression, and greater glaucoma severity accelerated time to surgery.
  • Increased Social Vulnerability Index (SVI) scores were associated with delayed glaucoma surgery (TR 1.11 per 25% increase).
  • Patients in the most deprived neighborhoods (highest national ADI quartile) experienced a 68% increase in time to surgery.

Conclusions:

  • Residence in areas with higher SVI or ADI scores correlates with delayed glaucoma surgery.
  • These findings highlight social determinants of health impacting surgical timing in glaucoma patients.
  • Awareness of these disparities is essential for developing targeted interventions to promote health equity.