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,...

You might also read

Related Articles

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

Sort by

Same author

A dataset of patients with isolated and syndromic optic neuropathies linked to RTN4IP1 genetic variants.

Scientific data·2026

Same author

OCT AND OCT-A FINDINGS IN GIANT CELL ARTERITIS: PAMM as a Specific Ischemic Marker.

Retina (Philadelphia, Pa.)·2026

Same author

Modulation of attentional bias by hypnosis: Disentangling the effect of induction and suggestion.

Consciousness and cognition·2025

Same author

Consensus-based recommendations for indications and procedures in retinal laser treatment of Telangiectatic capillaries (TelCaps) in vascular macular oedema: A Delphi study.

Acta ophthalmologica·2025

Same author

Minor salivary gland biopsy in the diagnosis of definite ocular sarcoidosis in paediatric granulomatous uveitis.

Pediatric rheumatology online journal·2025

Same author

Emotional valence, cloze probability, and entropy: Completion norms for 403 French sentences.

Behavior research methods·2025

Search research articles

Related Experiment Video

Updated: May 9, 2026

A Workflow to Quantitatively Determine Age-Related Macular Degeneration Lesion-Specific Variations in Fundus Autofluorescence

A Workflow to Quantitatively Determine Age-Related Macular Degeneration Lesion-Specific Variations in Fundus Autofluorescence

Published on: May 26, 2023

Does a yellow filter improve visual object categorization in normal aging?

Quentin Lenoble¹, Muriel Boucart, Marie-Bénédicte Rougier

¹a Université Bordeaux, Psychologie, Santé et Qualité de Vie , Bordeaux , France.

Neuropsychology, Development, and Cognition. Section B, Aging, Neuropsychology and Cognition

|August 8, 2013

Summary

This summary is machine-generated.

A yellow filter (CPF450) can improve visual performance in older adults, particularly in challenging conditions like low contrast and peripheral viewing. This simple visual aid may help mitigate age-related visual deficits.

More Related Videos

Visualizing Visual Adaptation

Visualizing Visual Adaptation

Published on: April 24, 2017

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

Related Experiment Videos

Last Updated: May 9, 2026

A Workflow to Quantitatively Determine Age-Related Macular Degeneration Lesion-Specific Variations in Fundus Autofluorescence

A Workflow to Quantitatively Determine Age-Related Macular Degeneration Lesion-Specific Variations in Fundus Autofluorescence

Published on: May 26, 2023

Visualizing Visual Adaptation

Visualizing Visual Adaptation

Published on: April 24, 2017

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

Area of Science:

Ophthalmology
Gerontology
Visual Neuroscience

Background:

Previous research indicates yellow filters (CPF450) enhance visual functions like contrast sensitivity and motion perception.
Age-related vision decline can impair object recognition and visual processing speed.

Purpose of the Study:

To evaluate the efficacy of a yellow filter in reducing age-related visual deficits.
To investigate the impact of a yellow filter on object categorization performance across different age groups and visual conditions.

Main Methods:

Two groups of 60 observers (young: mean age 24; elderly: mean age 72) performed an object categorization task.
Stimuli included grayscale images of objects and artifacts presented centrally or peripherally (21°) at low (8%) or medium (30%) contrast.
Performance was assessed under three filter conditions: no filter, placebo filter, and yellow filter (CPF450).

Main Results:

Elderly individuals exhibited greater deficits in performance with reduced contrast and peripheral viewing compared to younger observers.
The yellow filter significantly improved categorization speed for elderly participants across all conditions.
Response times decreased more substantially with the yellow filter when stimuli were presented peripherally in both age groups.

Conclusions:

A yellow filter (CPF450) shows potential as a non-invasive tool to enhance visual function in normal aging.
The benefits of the yellow filter are particularly noticeable under conditions that typically challenge older visual systems, such as peripheral presentation and low contrast.