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Glaucoma: Overview

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...

Angle Closure Glaucoma: Treatment

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...

Open Angle Glaucoma: Treatment

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: Aug 12, 2025

Iris Fixation via External Pentagram Suturing

Iris Fixation via External Pentagram Suturing

Published on: May 5, 2022

New glaucoma drainage implants available to glaucoma surgeons.

Mohamed Khodeiry¹, Mohamed S Sayed²

¹Department of Ophthalmology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA.

Current Opinion in Ophthalmology

|January 31, 2023

Summary

New glaucoma drainage devices (GDDs) show promise for treating complex glaucomas, offering potentially improved surgical outcomes. Further long-term studies are needed to establish them as the standard of care.

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Area of Science:

Ophthalmology
Surgical Innovation

Background:

Glaucoma drainage device (GDD) surgery is a key treatment for refractory glaucomas.
Recent trials suggest GDDs may be suitable for earlier disease stages.
Past GDD designs and techniques have not kept pace with clinical interest.

Approach:

Review of recent advancements in GDD design and surgical techniques.
Evaluation of novel GDDs, including the Ahmed ClearPath and Paul glaucoma implant.
Assessment of early safety and efficacy data for new GDDs.

Key Points:

Novel GDDs with unique features are now available.
New devices like Ahmed ClearPath and Paul glaucoma implant show comparable outcomes to traditional implants.
These newer GDDs may simplify surgical procedures and enhance patient outcomes.

Conclusions:

The introduction of new GDDs is a significant development for glaucoma surgeons.
Early results are encouraging, but long-term data is essential.
Comparative studies against traditional surgery and existing devices are required to define their role as the standard of care.