Related Experiment Video
Updated: Jan 8, 2026
07:12
Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
Published on: April 11, 2025
829
[Transient visual loss in morning glory syndrome]
N L Sheremet1, M H Durzhinskaya1, A A Kaloshina1
1Krasnov Research Institute of Eye Diseases, Moscow, Russia.
Vestnik Oftalmologii
|December 23, 2025
Summary
Transient visual loss (TVL) can be linked to rare optic disc anomalies. This case highlights morning glory syndrome (MGS) causing exertional TVL due to optic disc changes and vascular compromise.
Area of Science:
- Ophthalmology
- Neuro-ophthalmology
Background:
- Monocular transient visual loss (TVL) has diverse etiologies requiring thorough diagnostic evaluation.
- Rarely, TVL is associated with optic disc anomalies like morning glory syndrome (MGS), coloboma, or optic disc drusen.
Purpose of the Study:
- To present a clinical case of TVL in a patient diagnosed with MGS.
- To investigate the relationship between MGS and exertional TVL.
Main Methods:
- Clinical case presentation.
- Ophthalmoscopy to examine optic disc morphology and function.
- Ultrasonography to assess retrobulbar structures and vascular supply.
Main Results:
- A 25-year-old patient experienced recurrent TVL in the left eye, triggered by exertion and straining.
- Ophthalmoscopy revealed MGS with exercise-induced contractile movements of the optic disc during TVL episodes.
- Ultrasonography identified an avascular hyperechoic structure causing lateral displacement of the central retinal artery and vein.
Conclusions:
- MGS can be a cause of monocular TVL, particularly when associated with exertional optic disc movements.
- Vascular compromise due to structural anomalies within the optic disc appears to be the mechanism for TVL in this MGS case.
- The optic nerve changes causing TVL were localized and not indicative of systemic disease.
More Related Videos
Related Concept Videos
01:22Photoreceptors and Visual Pathways
8.6K
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,...
8.6K
01:25Glaucoma: Overview
1.2K
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...
1.2K
01:12Visual Agnosia
878
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...
878
01:27Open Angle Glaucoma: Treatment
920
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...
920
01:28Angle Closure Glaucoma: Treatment
1.1K
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...
1.1K
01:24Prosopagnosia
662
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...
662