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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...
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 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 18, 2026

A Surgical Approach for Optic Nerve Crush in a Rabbit Model
06:15

A Surgical Approach for Optic Nerve Crush in a Rabbit Model

Published on: July 8, 2025

Neuroprotection for optic nerve disorders.

Anne-Caroline Bessero1, Peter G H Clarke

  • 1Department of Neuro-Ophthalmology, The National Hospital for Neurology and Neurosurgery, London, UK. anncaroline.bessero@uclh.nhs.uk

Current Opinion in Neurology
|November 17, 2009
PubMed
Summary
This summary is machine-generated.

Neuroprotection research in rodent models reveals complex mechanisms of retinal ganglion cell death. Advances in understanding excitotoxicity and inflammatory pathways are refining strategies for optic nerve disorders like glaucoma.

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Partial Optic Nerve Transection in Rats: A Model Established with a New Operative Approach to Assess Secondary Degeneration of Retinal Ganglion Cells
13:12

Partial Optic Nerve Transection in Rats: A Model Established with a New Operative Approach to Assess Secondary Degeneration of Retinal Ganglion Cells

Published on: October 15, 2017

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Last Updated: Jun 18, 2026

A Surgical Approach for Optic Nerve Crush in a Rabbit Model
06:15

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Published on: July 8, 2025

Partial Optic Nerve Transection in Rats: A Model Established with a New Operative Approach to Assess Secondary Degeneration of Retinal Ganglion Cells
13:12

Partial Optic Nerve Transection in Rats: A Model Established with a New Operative Approach to Assess Secondary Degeneration of Retinal Ganglion Cells

Published on: October 15, 2017

Area of Science:

  • Ophthalmology
  • Neuroscience
  • Cell Biology

Background:

  • Neuroprotection strategies for optic nerve fiber loss emerged in the 1990s.
  • Research primarily utilizes rodent models to understand retinal ganglion cell death.
  • Clinical translation of neuroprotective therapies remains a challenge.

Purpose of the Study:

  • To review recent advances in understanding the mechanisms of optic nerve damage.
  • To highlight potential therapeutic strategies for neuroprotection.
  • To provide an update on the last year's progress in the field.

Main Methods:

  • Review of rodent models of excitotoxicity and axotomy.
  • Analysis of molecular interactions between retinal neurons and Müller glia.
  • Investigation of neurotrophin signaling pathways and inflammatory mediators.

Main Results:

  • Retinal ganglion cell death involves complex interactions, including Müller glia releasing tumor necrosis factor alpha.
  • Neurotrophins like nerve growth factor can paradoxically stimulate toxic release via p75NTR receptors.
  • LINGO-1 inhibits brain-derived neurotrophic factor (BDNF) neuroprotection; LINGO-1 antagonists enhance BDNF efficacy.
  • Infrared radiation shows potential for stimulating retinal defenses.

Conclusions:

  • Mechanisms of glaucoma and optic nerve disorders are increasingly understood through rodent models.
  • Key mechanisms include retrograde degeneration, excitotoxicity, and inflammatory/autoimmune processes.
  • Neuroprotective strategies are being refined based on enhanced mechanistic insights.