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Related Concept Videos

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...
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...

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Related Experiment Video

Updated: Jun 27, 2026

Ultrasound Cyclo Plasty in Eyes with Glaucoma
05:05

Ultrasound Cyclo Plasty in Eyes with Glaucoma

Published on: January 26, 2018

Nonpenetrating glaucoma surgery.

Efstratios Mendrinos1, André Mermoud, Tarek Shaarawy

  • 1Department of Ophthalmology, Geneva University Hospitals, Geneva, Switzerland.

Survey of Ophthalmology
|November 26, 2008
PubMed
Summary
This summary is machine-generated.

Nonpenetrating glaucoma surgeries enhance natural aqueous outflow for improved safety over conventional methods. While safer, their efficacy compared to traditional surgeries remains debated, requiring further research.

Related Experiment Videos

Last Updated: Jun 27, 2026

Ultrasound Cyclo Plasty in Eyes with Glaucoma
05:05

Ultrasound Cyclo Plasty in Eyes with Glaucoma

Published on: January 26, 2018

Area of Science:

  • Ophthalmology
  • Surgical Innovation
  • Glaucoma Management

Background:

  • Conventional glaucoma surgeries carry risks.
  • Nonpenetrating glaucoma surgeries aim to improve safety by enhancing natural aqueous humor outflow pathways.
  • Viscocanalostomy and deep sclerectomy are leading nonpenetrating techniques.

Purpose of the Study:

  • To review nonpenetrating glaucoma surgical techniques.
  • To discuss their mechanisms of action, indications, and contraindications.
  • To analyze complications and clinical outcomes.

Main Methods:

  • Surgical techniques involve creating an intrascleral space by removing specific tissue layers.
  • Aqueous humor egresses through the intact trabeculo-Descemet's membrane into this space.
  • Review of published clinical trials comparing nonpenetrating surgery to trabeculectomy.

Main Results:

  • Nonpenetrating glaucoma surgery demonstrates a superior safety profile compared to full-thickness trabeculectomy.
  • Efficacy results are conflicting across studies, with no consensus on whether it matches trabeculectomy.
  • These procedures have a significant learning curve for surgeons.

Conclusions:

  • Nonpenetrating glaucoma surgery offers enhanced safety for patients.
  • Further research is needed to clarify efficacy and optimize surgical techniques.
  • These procedures represent a significant advancement in glaucoma treatment.