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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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Arboviral encephalitis refers to brain inflammation caused by arthropod-borne viruses, particularly those transmitted through mosquito vectors. Among these, West Nile virus (WNV), a member of the Flaviviridae family, is a significant public health concern. WNV is an enveloped, positive-sense, single-stranded RNA virus. Human infection typically begins when an infected mosquito introduces the virus into the dermis during feeding. The primary transmission cycle involves birds as amplifying hosts...
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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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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,...
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Related Experiment Video

Updated: Mar 31, 2026

Induction of Paralysis and Visual System Injury in Mice by T Cells Specific for Neuromyelitis Optica Autoantigen Aquaporin-4
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Atypical Optic Neuritis.

Eric D Gaier1,2, Katherine Boudreault3,4, Joseph F Rizzo5,6,7

  • 1Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Boston, MA, USA. Eric_Gaier@meei.harvard.edu.

Current Neurology and Neuroscience Reports
|October 16, 2015
PubMed
Summary
This summary is machine-generated.

Atypical demyelinating optic neuritis presents differently than classic cases, often lacking pain and responding poorly to steroids. Recognizing these features is crucial for diagnosing rare causes of optic nerve inflammation.

Keywords:
Chronic relapsing inflammatory optic neuropathyIschemic optic neuropathyLyme borreliosisNeuromyelitis optica (NMO)Optic neuritisSarcoidosis

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Area of Science:

  • Neuro-ophthalmology
  • Neuroimmunology

Background:

  • Classic demyelinating optic neuritis, often linked to multiple sclerosis, usually has a good visual recovery prognosis.
  • The Optic Neuritis Treatment Trial established characteristic features of typical optic neuritis.
  • Atypical presentations deviate from the classic pattern, suggesting alternative diagnoses.

Purpose of the Study:

  • To define atypical demyelinating optic neuritis.
  • To highlight clinical features that warrant investigation for less common causes.
  • To suggest diagnostic pathways for atypical cases.

Main Methods:

  • Review of clinical features distinguishing typical from atypical optic neuritis.
  • Identification of specific atypical signs and symptoms.
  • Discussion of differential diagnoses and diagnostic evaluations.

Main Results:

  • Atypical features include lack of pain, simultaneous onset, poor response to corticosteroids, or optic nerve hemorrhages.
  • These features necessitate considering etiologies beyond typical demyelinating disease.
  • Diagnostic steps are proposed for evaluating these alternative causes.

Conclusions:

  • Deviations from classic demyelinating optic neuritis presentation require consideration of other conditions.
  • Prompt recognition of atypical features guides appropriate diagnostic workup.
  • This approach aids in identifying and managing less common optic nerve disorders.