Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Photoreceptors and Visual Pathways

Photoreceptors and Visual Pathways

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, whereas...

Color Vision

Color Vision

Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.

Visual Agnosia

Visual Agnosia

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 end"...

Anatomy of the Eyeball

Anatomy of the Eyeball

The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle layer, the vascular tunic,...

Vision

Vision

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.

You might also read

Related Articles

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

Sort by

Same author

Bidirectional Retro mode differential imaging improves drusen boundary depiction in early and intermediate AMD: a pilot study.

Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie·2026

Same author

Diagnostic Performance of Ring Aperture Retro Mode Imaging for Detecting Pigment Migration in Age-Related Macular Degeneration.

Diagnostics (Basel, Switzerland)·2026

Same author

Simple reaction time to visual and auditory stimulation in glaucoma.

European journal of ophthalmology·2025

Same author

Visual Functions in Patients With Leber Hereditary Optic Neuropathy.

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

Same author

Age Difference on the Spatial Scale of Object Categorization.

Experimental aging research·2024

Same author

Method to Quickly Map Multifocal Pupillary Response Fields (mPRF) Using Frequency Tagging.

Vision (Basel, Switzerland)·2024

Search research articles

Related Experiment Video

Updated: Jun 27, 2026

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss

Published on: April 11, 2025

Does context or color improve object recognition in patients with low vision?

Muriel Boucart¹, Pascal Despretz, Katrine Hladiuk

¹Lab. Neurosciences Fonctionnelles & Pathologies, Université Lille, Nord de France, CHU Lille, CNRS, Lille, France. m-boucart@chru-lille.fr

Visual Neuroscience

|December 20, 2008

Summary

Color and simplified scenes improve object recognition for individuals with age-related macular degeneration (AMD) and low vision. These visual aids aid in analyzing complex images, unlike in normally sighted individuals.

More Related Videos

Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation

Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation

Published on: December 8, 2023

Visualizing Visual Adaptation

Visualizing Visual Adaptation

Published on: April 24, 2017

Related Experiment Videos

Last Updated: Jun 27, 2026

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss

Published on: April 11, 2025

Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation

Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation

Published on: December 8, 2023

Visualizing Visual Adaptation

Visualizing Visual Adaptation

Published on: April 24, 2017

Area of Science:

Visual perception research
Ophthalmology
Cognitive neuroscience

Background:

Previous research on age-related macular degeneration (AMD) primarily used simple visual stimuli.
Limited understanding exists regarding complex visual scene analysis in individuals with low vision due to AMD.

Purpose of the Study:

To investigate the visual perception capabilities of individuals with AMD and low vision using complex stimuli.
To compare performance with normally sighted controls under varying visual conditions.

Main Methods:

Fifteen participants with AMD and low vision and 11 age-matched normally sighted controls participated.
Participants viewed colored and achromatic natural scene photographs, and natural scenes versus isolated objects.
Stimuli were presented for 300 ms, requiring target detection (face or animal).

Main Results:

Color significantly improved performance in individuals with low vision, while controls showed no difference.
Individuals with low vision were more accurate in categorizing isolated objects compared to objects within scenes.
Normally sighted observers showed no difference in performance between isolated objects and objects in scenes.

Conclusions:

Color perception enhances object recognition for individuals with AMD and low vision.
Reduced visual crowding and improved image segmentation, facilitated by factors like color, aid object perception in low vision.