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Related Concept Videos

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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Vision01:24

Vision

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Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
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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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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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Visual System01:26

Visual System

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Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
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Related Experiment Video

Updated: Apr 18, 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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[Blindness and visual rehabilitation].

F Matonti1, S Roux2, D Denis1

  • 1Service d'ophtalmologie, hôpital Nord, chemin de Bourrely, 13915 Marseille cedex 20, France; Équipe InViBe, institut de neurosciences de la Timone, UMR 7289 CNRS, Aix-Marseille université, 13402 Marseille cedex 20, France.

Journal Francais D'Ophtalmologie
|January 18, 2015
PubMed
Summary
This summary is machine-generated.

New treatments for blindness and visual impairment are being developed. This review covers cell therapy, molecular therapy, and prosthetic interfaces to improve patient independence.

Keywords:
BlindnessCellular therapyCécitéImplant télescopiqueOptogeneticOptogénétiqueProthèses rétiniennesRetinal prosthesisRéhabilitation visuelleTelescopic implantThérapie cellulaireVisual rehabilitation

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Comparison of Three Clinical Stereoscopic Methods for Measuring Binocular Visual Function During Amblyopic Treatment in Unilateral Amblyopia
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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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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Biomedical Engineering

Context:

  • Blindness and visual impairment represent a significant global public health challenge.
  • There is a growing need for effective rehabilitation strategies to enhance patient independence.

Purpose:

  • To review current and emerging treatment alternatives for blindness and visual impairment.
  • To describe the outcomes and limitations associated with various therapeutic approaches.

Summary:

  • Explores diverse treatment modalities including cell and molecular therapies.
  • Discusses the application of prosthetic interfaces for vision restoration.
  • Analyzes the efficacy and constraints of existing and novel interventions.

Impact:

  • Provides a comprehensive overview of the landscape of vision restoration research.
  • Informs clinicians and researchers about the potential and challenges of different therapeutic avenues.
  • Contributes to the advancement of strategies aimed at mitigating the impact of visual impairment.