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Related Concept Videos

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...
Diabetic Retinopathy01:27

Diabetic Retinopathy

DefinitionDiabetic retinopathy is a microvascular complication of diabetes affecting the retinal blood vessels.Risk FactorsDiabetic retinopathy is present in almost all individuals with type 1 diabetes and more than 60% of those with type 2 diabetes after two decades of disease.The risk increases with poor glycemic control, hypertension, dyslipidemia, smoking, pregnancy, and puberty.Although cataracts and glaucoma are also more frequent in people with diabetes, retinopathy remains the leading...
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...

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Related Experiment Video

Updated: Jul 4, 2026

The Rodent Model of Nonarteritic Anterior Ischemic Optic Neuropathy (rNAION)
06:49

The Rodent Model of Nonarteritic Anterior Ischemic Optic Neuropathy (rNAION)

Published on: November 20, 2016

[Recurrent inflammatory optic neuropathy].

C Arndt1, P Labauge, C Speeg-Schatz

  • 1Service d'Ophtalmologie, Hôpital Gui de Chauliac, CHU, Montpellier. carl.arndt@laposte.net

Journal Francais D'Ophtalmologie
|June 20, 2008
PubMed
Summary
This summary is machine-generated.

Recurrent isolated optic neuropathy can cause progressive vision loss, particularly in untreated patients. Long-term immunosuppressive treatment may help preserve visual acuity over time.

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Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients

Published on: April 14, 2014

Area of Science:

  • Ophthalmology
  • Neurology
  • Immunology

Context:

  • Recurrent isolated optic neuropathy (RION) is a rare condition.
  • Normal cerebral MRI differentiates RION from other demyelinating diseases.
  • Understanding RION's clinical course is crucial for management.

Purpose:

  • To analyze clinical and paraclinical features of RION.
  • To investigate the impact of disease duration and treatment on visual acuity.
  • To explore potential axonal loss as a cause of vision deterioration.

Summary:

  • A study reviewed 13 patients with RION, observing 2-6 relapses over a median of 4 years.
  • Untreated patients showed a significant inverse correlation between visual acuity and disease duration.
  • Long-term immunosuppressive treatment did not show this correlation, suggesting a potential benefit.

Impact:

  • Findings suggest progressive vision loss in RION may be linked to axonal loss.
  • Highlights the potential benefit of long-term immunosuppressive therapy in RION.
  • Supports the need for prospective studies to confirm treatment efficacy and disease progression patterns.