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Related Concept Videos

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, 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 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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Related Experiment Video

Updated: Jun 24, 2025

Author Spotlight: Developing Precise and Clinically Relevant Models for Studying Secondary Degeneration in Traumatic Optic Neuropathy
04:02

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Traumatic optic neuropathy management: a systematic review.

Richard J Blanch1,2,3, Iric John Joseph4, Kimberly Cockerham5

  • 1Royal Centre for Defence Medicine, Birmingham, UK. r.j.blanch@bham.ac.uk.

Eye (London, England)
|June 11, 2024
PubMed
Summary
This summary is machine-generated.

Current treatments for traumatic optic neuropathy lack proven benefits. High-dose intravenous methylprednisolone (IVMP) shows increased mortality risk in traumatic brain injury (TBI) patients, while optic canal decompression offers no advantage. Orbital compartment syndrome requires immediate intervention.

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Area of Science:

  • Ophthalmology
  • Neurology
  • Trauma Surgery

Background:

  • Traumatic optic neuropathy (TON) affects up to 8% of traumatic brain injury (TBI) patients, with subclinical damage being more prevalent.
  • Sensitive testing reveals visual field defects or optic atrophy in over half of moderate to severe TBI cases.
  • Orbital compartment syndrome necessitates urgent intervention to prevent permanent optic nerve dysfunction.

Approach:

  • Systematic review of treatments for traumatic optic neuropathy.
  • Adherence to PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines.
  • Inclusion of three randomized controlled trials evaluating intravenous methylprednisolone (IVMP), erythropoietin, and levodopa-carbidopa.

Key Points:

  • No demonstrated benefit for IVMP, erythropoietin, or levodopa-carbidopa in treating TON.
  • High-dose IVMP linked to increased mortality in TBI patients.
  • Optic canal decompression shows no efficacy for TON.

Conclusions:

  • Medical treatments for TON lack evidence of benefit.
  • High-dose IVMP poses a significant harm risk.
  • Orbital compartment syndrome is a distinct emergency requiring prompt medical and surgical management to preserve vision.