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Related Concept Videos

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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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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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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Updated: Jun 23, 2025

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
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The Glaucoma Intensive Treatment Study (GITS): A Randomized Controlled Trial Comparing Intensive and Standard

Boel Bengtsson1, Anders Heijl2, Johan Aspberg2

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Summary

Intensive initial treatment for open-angle glaucoma showed benefits for patients with high untreated intraocular pressure (IOP). This strategy may slow visual field damage progression compared to traditional therapy.

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Area of Science:

  • Ophthalmology
  • Glaucoma Research
  • Clinical Trials

Background:

  • Open-angle glaucoma is a leading cause of irreversible blindness.
  • Intraocular pressure (IOP) is a primary risk factor for glaucoma progression.
  • Early and moderate glaucoma require effective management strategies to preserve visual function.

Purpose of the Study:

  • To evaluate the impact of an intensive initial IOP-lowering strategy on visual field damage progression in newly detected open-angle glaucoma.
  • To compare intensive multi-therapy with standard mono-therapy in managing glaucoma.

Main Methods:

  • A randomized, controlled, 2-center clinical trial involving 242 patients with early or moderate open-angle glaucoma.
  • Participants were assigned to either intensive IOP-lowering treatment with laser trabeculoplasty or traditional mono-therapy.
  • Visual field index (VFI) at projected end of life was the primary outcome measure.

Main Results:

  • The intensive multi-treatment group experienced slower annual visual field progression (0.25 vs 0.65 percentage units/year) and fewer progression events (11% vs 21%).
  • Overall VFI at projected end of life was not significantly different between groups (87.1% vs 79.3%).
  • A post hoc analysis revealed significant benefits of intensive treatment in patients with higher untreated IOP.

Conclusions:

  • Intensive initial IOP-lowering treatment demonstrated a trend towards better visual field outcomes and significantly reduced progression events.
  • The study suggests considering intensive initial treatment for glaucoma patients with high untreated IOP at diagnosis.
  • Routine multi-therapy for all glaucoma patients was not supported by the overall findings.