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Related Concept Videos

Visual Agnosia01:12

Visual Agnosia

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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...
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Prosopagnosia01:24

Prosopagnosia

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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...
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Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

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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,...
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Blind Procedures02:07

Blind Procedures

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Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which...
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Glaucoma: Overview01:25

Glaucoma: Overview

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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...
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Blinding01:11

Blinding

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Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.
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Related Experiment Video

Updated: May 4, 2026

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

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[Cortical blindness].

S Chokron1

  • 1UMR 8158, unité vision et cognition, fondation ophtalmologique Rothschild, 25, rue Manin, 75019 Paris, France.

Journal Francais D'Ophtalmologie
|January 8, 2014
PubMed
Summary
This summary is machine-generated.

Cortical blindness, a vision loss from occipital lesions, is better understood through interdisciplinary research. This leads to earlier diagnosis and new rehabilitation strategies for affected individuals.

Keywords:
BlindnessBlindsightCortex visuel primaireCortical visual impairmentCécitéLobe occipitalNeurovisuelOccipital lobePrimary visual cortexVision

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Cognitive Psychology

Context:

  • Cortical blindness results from bilateral occipital lesions.
  • Advances in neuroimaging and interdisciplinary research (psychophysics, cognitive psychology, neurophysiology, neuropsychology) have enhanced understanding of neurovisual deficits.

Purpose:

  • To improve the understanding of neurovisual deficits, specifically cortical blindness.
  • To explore new diagnostic and rehabilitation perspectives for cortical blindness.

Summary:

  • Interdisciplinary research and neuroimaging have significantly advanced the understanding of cortical blindness.
  • This progress facilitates earlier diagnosis and opens new avenues for rehabilitation in both children and adults.

Impact:

  • Enables earlier diagnosis and intervention for cortical blindness.
  • Provides new rehabilitation strategies for individuals with visual impairment.
  • Studying complex deficits like cortical blindness offers insights into normal visual system functioning.