Related Experiment Video
Updated: Jul 11, 2026

12:23
Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients
Published on: April 14, 2014
Ophthalmic diagnoses in the ED: optic neuritis
Carl A Germann1, Michael R Baumann, Sirus Hamzavi
1Department of Emergency Medicine, Maine Medical Center, Portland, ME 04102, USA. germac@mmc.org
The American Journal of Emergency Medicine
|September 18, 2007
Summary
Optic neuritis, an inflammation of the optic nerve, is a common cause of vision loss in young adults. It is often linked to multiple sclerosis and presents with rapid vision decline and eye pain.
Area of Science:
- Ophthalmology
- Neurology
Background:
- Optic neuritis is a leading cause of vision impairment in individuals aged 20-40.
- It involves inflammation and demyelination of the optic nerve.
Observation:
- Symptoms include rapid vision loss (1-10 days), impaired color vision, and eye pain with movement.
- An afferent pupillary defect is a key clinical sign.
Findings:
- Demyelinative lesions in optic neuritis resemble those found in multiple sclerosis (MS).
- Acute optic neuritis can be an early indicator of MS.
Implications:
- Early recognition is crucial for timely diagnosis and management of potential underlying neurological conditions.
- Emergency physicians must be aware of its presentation due to its infrequent occurrence.
Related Concept Videos
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...
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...
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...
Drugs such as carbonic anhydrase inhibitors, α2- and...
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...
Accessory Structures of the Eye
Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...

