Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Focusing of Light in the Eye01:16

Focusing of Light in the Eye

6.1K
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
6.1K
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

8.3K
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,...
8.3K
Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

1.6K
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...
1.6K
Glaucoma: Overview01:25

Glaucoma: Overview

1.7K
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...
1.7K
Accessory Structures of the Eye01:17

Accessory Structures of the Eye

4.2K
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...
4.2K
Prosopagnosia01:24

Prosopagnosia

1.2K
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...
1.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Kikuchi-Fujimoto disease associated optic neuropathy in an adolescent.

American journal of ophthalmology case reports·2025
Same author

Five-Year Outcomes of Lenadogene Nolparvovec Gene Therapy in Leber Hereditary Optic Neuropathy.

JAMA ophthalmology·2024
Same author

Sweet Syndrome in the Central Nervous System: A Case of Orbital Inflammation, Sixth Nerve Palsy, and Pachymeningitis.

Journal of neuro-ophthalmology : the official journal of the North American Neuro-Ophthalmology Society·2024
Same author

THE PERIPAPILLARY RETINA: A COMMON JUNCTURE IN STARGARDT DISEASE AND IDIOPATHIC INTRACRANIAL HYPERTENSION.

Retinal cases & brief reports·2024
Same author

Microbiological alterations in the conjunctiva of hot tub-soaking ophthalmologists (MACHO): a randomized double-blind clinical trial.

Medical hypothesis, discovery & innovation ophthalmology journal·2024
Same author

The TsiogkaSpaeth grid for detection of neurological visual field defects: a validation study.

Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology·2024
Same journal

Trends in pediatric uveitis: A systematic review and meta-epidemiological investigation of geographic, economic, and climate factors.

Survey of ophthalmology·2026
Same journal

Efficacy and safety of different intraocular therapies for non-infectious uveitis: A network meta-analysis.

Survey of ophthalmology·2026
Same journal

Macular telangiectasia masqueraders.

Survey of ophthalmology·2026
Same journal

Utilization of anterior segment optical coherence tomography in childhood glaucoma: A systematic review.

Survey of ophthalmology·2026
Same journal

Peripapillary pachychoroid syndrome: Clinical and imaging features, diagnostic differentiation and therapeutic strategies.

Survey of ophthalmology·2026
Same journal

Prognostic factors and postoperative outcomes in pediatric cataract patients: A systematic review and meta-analysis.

Survey of ophthalmology·2026
See all related articles

Related Experiment Video

Updated: Apr 26, 2026

Three Dimensional Vestibular Ocular Reflex Testing Using a Six Degrees of Freedom Motion Platform
10:12

Three Dimensional Vestibular Ocular Reflex Testing Using a Six Degrees of Freedom Motion Platform

Published on: May 23, 2013

15.8K

Vision loss with bending over.

Michele D Lee1, Jeffrey G Odel1, Danielle S Rudich1

  • 1Department of Ophthalmology, Columbia University, New York, New York, USA.

Survey of Ophthalmology
|August 12, 2014
PubMed
Summary
This summary is machine-generated.

Transient visual loss in a patient with cardiovascular risk factors was linked to a microhyphema. This finding, revealed by gonioscopy, highlights potential intraocular causes of vision changes after bleb manipulation.

Keywords:
amaurosis fugaxmicrohyphemasnow globe effecttransient vision lossuveitis-glaucoma-hyphema syndrome

More Related Videos

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
07:06

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients

Published on: March 29, 2022

3.2K
Assessment of Static Graviceptive Perception in the Roll-Plane using the Subjective Visual Vertical Paradigm
06:30

Assessment of Static Graviceptive Perception in the Roll-Plane using the Subjective Visual Vertical Paradigm

Published on: April 28, 2020

5.1K

Related Experiment Videos

Last Updated: Apr 26, 2026

Three Dimensional Vestibular Ocular Reflex Testing Using a Six Degrees of Freedom Motion Platform
10:12

Three Dimensional Vestibular Ocular Reflex Testing Using a Six Degrees of Freedom Motion Platform

Published on: May 23, 2013

15.8K
Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
07:06

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients

Published on: March 29, 2022

3.2K
Assessment of Static Graviceptive Perception in the Roll-Plane using the Subjective Visual Vertical Paradigm
06:30

Assessment of Static Graviceptive Perception in the Roll-Plane using the Subjective Visual Vertical Paradigm

Published on: April 28, 2020

5.1K

Area of Science:

  • Ophthalmology
  • Ocular diagnostics
  • Anterior segment imaging

Background:

  • Episodic transient visual loss can be a challenging diagnostic presentation.
  • Cardiovascular risk factors may prompt initial vascular investigations.
  • Intraocular pathology should be considered in the differential diagnosis of transient visual disturbances.

Observation:

  • A 66-year-old male experienced recurrent episodes of transient visual loss.
  • Symptoms were consistently triggered by bending forward.
  • Initial examination did not reveal obvious intraocular abnormalities.

Findings:

  • Fundus photography during an episode suggested an intraocular process.
  • Gonioscopy identified a microhyphema in the anterior chamber.
  • The microhyphema created a characteristic "snow globe" appearance.

Implications:

  • Microhyphema can manifest as transient visual loss, mimicking other conditions.
  • Recent bleb manipulation is a potential iatrogenic cause of microhyphema.
  • Ophthalmological evaluation, including gonioscopy, is crucial for diagnosing such cases.