Related Experiment Video
Updated: Aug 2, 2026
09:16
Simultaneous ex vivo Functional Testing of Two Retinas by in vivo Electroretinogram System
Published on: May 6, 2015
Variation of chromatic sensitivity across the life span
K Knoblauch1, F Vital-Durand, J L Barbur
1INSERM Unité 371, Cerveau et Vision, 18 avenue du Doyen Lépine, 69675 Bron, France. knoblauc@vision.univ-st-etienne.fr
Vision Research
|February 13, 2001
Summary
Visual sensitivity to color changes improves from infancy to adolescence, then declines in adulthood. This pattern suggests consistent underlying chromatic mechanisms throughout the human lifespan.
Area of Science:
- Vision Science
- Human Development
- Color Perception
Background:
- Color perception is crucial for visual function.
- Understanding how color vision changes across the lifespan is important for developmental and aging studies.
Purpose of the Study:
- To measure color detection thresholds across a wide age range.
- To characterize the developmental trajectory of color vision sensitivity.
Main Methods:
- Measured equiluminant color change detection thresholds in three color directions.
- Used preferential looking for pre-verbal infants and verbal/manual responses for older observers.
- Employed spatio-temporal achromatic noise to isolate chromatic detection.
Main Results:
- Color detection thresholds improved (decreased) by nearly half with each age doubling until adolescence.
- Thresholds worsened (increased) by 1.4-2 times with each age doubling after adolescence.
- Sensitivity changes were similar across all tested color axes.
Conclusions:
- Human color vision sensitivity follows a distinct developmental curve, peaking in adolescence.
- Chromatic mechanisms appear to maintain uniform sensitivity patterns throughout life.
- Findings provide insights into visual development and aging.
Related Concept Videos
01:32The Retina
The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
02:27Background and Environment Affect Phenotype
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
01:20Anatomy 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,...
01:22Photoreceptors 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...
01:24Color 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.