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

Glaucoma: Overview01:25

Glaucoma: Overview

1.6K
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...
1.6K
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

10.6K
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,...
10.6K
Visual Agnosia01:12

Visual Agnosia

1.6K
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...
1.6K
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

1.1K
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...
1.1K
Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

1.5K
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...
1.5K
Prosopagnosia01:24

Prosopagnosia

1.1K
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...
1.1K

You might also read

Related Articles

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

Sort by
Same author

Improving Access and Reducing the Burden on Public Ophthalmology: Collaborative Telehealth Models Between Ophthalmology and Optometry in Australia.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2026
Same author

Evaluation of a Collaborative Telehealth Model for Eye Care Between Ophthalmology and Optometry in Western Australia.

The Australian journal of rural health·2026
Same author

Small areas of damage due to glaucoma are less likely to be identified by SITA-Faster than SITA-Standard.

Optometry and vision science : official publication of the American Academy of Optometry·2026
Same author

Spatial suppression of motion and motion segmentation in peripheral vision.

Journal of vision·2026
Same author

Deprescribing in Older People: A Clinical Practice Guideline Summary.

The Medical journal of Australia·2026
Same author

Pulvinar-posterior superior temporal sulcus connectivity contributes to non-conscious emotion processing in affective blindsight.

Cerebral cortex (New York, N.Y. : 1991)·2026

Related Experiment Video

Updated: Mar 16, 2026

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
07:11

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential

Published on: May 25, 2020

6.9K

Visual object categorisation in people with glaucoma.

Quentin Lenoble1, Jia Jia Lek2, Allison M McKendrick2

  • 1University of Lille, CNRS, CHU Lille, UMR 9193-SCALab-Sciences Cognitives et, Sciences Affectives, Lille, France.

The British Journal of Ophthalmology
|August 10, 2016
PubMed
Summary
This summary is machine-generated.

Glaucoma patients show reduced accuracy and slower response times in visual object categorization tasks, especially with medium contrast. Performance matched controls with high contrast, suggesting contrast sensitivity is key.

Keywords:
GlaucomaVisionVisual pathwayVisual perception

More Related Videos

Author Spotlight: Insights into Visual Cortex Research Through Wide-View fMRI Mapping
07:11

Author Spotlight: Insights into Visual Cortex Research Through Wide-View fMRI Mapping

Published on: December 8, 2023

2.5K
Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
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

1.0K

Related Experiment Videos

Last Updated: Mar 16, 2026

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
07:11

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential

Published on: May 25, 2020

6.9K
Author Spotlight: Insights into Visual Cortex Research Through Wide-View fMRI Mapping
07:11

Author Spotlight: Insights into Visual Cortex Research Through Wide-View fMRI Mapping

Published on: December 8, 2023

2.5K
Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
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

1.0K

Area of Science:

  • Ophthalmology
  • Neuroscience
  • Visual Science

Background:

  • Glaucoma is known to impair complex visual functions beyond simple visual field loss.
  • Previous research indicates difficulties in tasks like face recognition and motion perception.

Purpose of the Study:

  • To investigate if glaucoma impacts the ability to categorize briefly presented visual objects in central vision.
  • To assess visual categorization performance in glaucoma patients compared to controls.

Main Methods:

  • 14 glaucoma patients and 15 controls performed a visual categorization task with briefly presented (28ms) foveal images.
  • Stimuli included medium (50%) and high (100%) contrast images.
  • Accuracy and response times were measured.

Main Results:

  • Glaucoma patients had significantly lower accuracy (87% vs 94%) and slower response times (712ms vs 643ms) with medium contrast stimuli.
  • Performance was comparable between groups when high contrast (100%) stimuli were used.

Conclusions:

  • Visual categorization deficits in glaucoma patients are not fully explained by visual field loss alone.
  • Maximizing stimulus contrast can normalize visual categorization performance in glaucoma patients.