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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...
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...

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Related Experiment Video

Updated: May 9, 2026

Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients
12:23

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

Published on: April 14, 2014

[Acute optic neuropathy: differential diagnoses].

María Celeste Buompadre1

  • 1Hospital de Pediatria SAMIC. Prof. Dr. J.P. Garrahan, Buenos Aires, Argentina.

Revista De Neurologia
|July 31, 2013
PubMed
Summary

Acute optic neuropathies encompass diverse conditions affecting the optic nerve, leading to varied visual outcomes. Prompt diagnosis via neurological exam, fundoscopy, and neuroimaging is crucial for effective treatment.

Area of Science:

  • Ophthalmology
  • Neurology
  • Neuroscience

Context:

  • Optic nerve dysfunction presents with visual loss, altered color vision, visual field deficits, and pupillary abnormalities.
  • Acute optic neuropathies represent a spectrum of conditions with diverse etiologies and prognoses.

Purpose:

  • To review the clinical spectrum of acute optic neuropathies, emphasizing diagnostic approaches and management strategies.
  • To highlight specific considerations for pediatric optic neuropathies.

Summary:

  • Optic neuritis can be isolated, recurrent, or part of demyelinating diseases, requiring treatment to minimize attacks and disability.
  • Infectious neuritis necessitates etiological treatment, while nonarteritic ischemic optic neuropathy is linked to retinal vascular disorders.
  • Leber hereditary optic neuropathy causes chronic visual impairment, with no current cure, and papilledema management focuses on reducing intracranial pressure.

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

Published on: November 20, 2016

Related Experiment Videos

Last Updated: May 9, 2026

Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients
12:23

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

Published on: April 14, 2014

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

Impact:

  • Understanding the varied causes and presentations of acute optic neuropathies improves diagnostic accuracy.
  • Tailored treatment strategies based on etiology and clinical findings optimize visual outcomes.
  • Early detection and intervention are key to managing optic nerve dysfunction and preventing irreversible vision loss.