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Related Concept Videos

Visual Agnosia01:12

Visual Agnosia

Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...
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...
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...
Prosopagnosia01:24

Prosopagnosia

Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
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: Jun 17, 2026

Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
07:45

Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition

Published on: July 21, 2020

Sudden unilateral visual field loss.

Robin G Jones1, Adrian Peall

  • 1Department of Eye and Rheumatology, Dunedin Public Hospital, Dunedin, NewZealand.

Journal of Emergencies, Trauma, and Shock
|December 17, 2009
PubMed
Summary
This summary is machine-generated.

Branch retinal artery occlusion (BRAO) causes sudden vision loss and may signal serious underlying health issues. Prompt evaluation and management, including antiplatelet therapy, are crucial for treatment and preventing further complications.

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Area of Science:

  • Ophthalmology
  • Vascular Medicine
  • Emergency Medicine

Background:

  • Branch retinal artery occlusion (BRAO) presents as sudden visual loss, frequently seen in emergency settings.
  • BRAO can be indicative of systemic conditions associated with significant morbidity and mortality.
  • Current acute treatments for BRAO have uncertain efficacy, necessitating a review of diagnostic and therapeutic strategies.

Purpose of the Study:

  • To present a classical case of acute branch retinal artery occlusion (BRAO).
  • To review the diagnostic, therapeutic, and prognostic aspects of BRAO.
  • To emphasize the importance of identifying and managing associated systemic conditions.

Main Methods:

  • Literature review of diagnostic criteria, acute management options, and long-term treatment for BRAO.
  • Case report detailing a classical presentation of acute BRAO.
  • Discussion of potential systemic associations requiring multidisciplinary input.

Main Results:

  • BRAO is a critical condition requiring prompt recognition due to potential for permanent vision loss.
  • Conservative measures in the emergency room may be attempted for embolus dislodgement.
  • Antiplatelet therapy and cardiovascular risk management are the established treatments for BRAO.

Conclusions:

  • Early diagnosis and management of BRAO are essential for visual preservation.
  • BRAO necessitates a comprehensive evaluation for underlying systemic diseases.
  • Multidisciplinary collaboration is vital for managing patients with BRAO due to potential life-threatening associations.