Specificity of the chromatic noise influence on the luminance contrast discrimination to the color vision phenotype

Many studies have examined how color and luminance information are processed in the visual system. It has been observed that chromatic noise masked luminance discrimination in trichromats and that luminance thresholds increased as a function of noise saturation. Here, we aimed to compare chromatic n...

Full description

Saved in:
Bibliographic Details
Published in:Scientific reports 2020-10, Vol.10 (1), p.17897-17897, Article 17897
Main Authors: Sousa, Bruna Rafaela Silva, Loureiro, Terezinha Medeiros Gonçalves, Goulart, Paulo Roney Kilpp, Cortes, Maria Izabel Tentes, Costa, Marcelo Fernandes, Bonci, Daniela Maria Oliveira, Baran, Luiz Claudio Portnoi, Hauzman, Einat, Ventura, Dora Fix, Miquilini, Leticia, Souza, Givago Silva
Format: Article
Language:English
Subjects:
Adult
Color Perception - physiology
Color vision
Color Vision - physiology
Color Vision Defects - physiopathology
Color Vision Defects - psychology
Contrast Sensitivity - physiology
Discrimination, Psychological - physiology
Female
Humans
Information processing
Male
Noise
Pattern Recognition, Visual - physiology
Phenotype
Phenotypes
Photic Stimulation
Sensory Thresholds - physiology
Visual discrimination
Visual system
Visual thresholds
Young Adult
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Many studies have examined how color and luminance information are processed in the visual system. It has been observed that chromatic noise masked luminance discrimination in trichromats and that luminance thresholds increased as a function of noise saturation. Here, we aimed to compare chromatic noise inhibition on the luminance thresholds of trichromats and subjects with severe deutan or protan losses. Twenty-two age-matched subjects were evaluated, 12 trichromats and 10 with congenital color vision impairment: 5 protanopes/protanomalous, and 5 deuteranopes/deuteranomalous. We used a mosaic of circles containing chromatic noise consisting of 8 chromaticities around protan, deutan, and tritan confusion lines. A subset of the circles differed in the remaining circles by the luminance arising from a C-shaped central target. All the participants were tested in 4 chromatic noise saturation conditions (0.04, 0.02, 0.01, 0.005 u'v' units) and 1 condition without chromatic noise. We observed that trichromats had an increasing luminance threshold as a function of chromatic noise saturation under all chromatic noise conditions. The subjects with color vision deficiencies displayed no changes in the luminance threshold across the different chromatic noise saturations when the noise was composed of chromaticities close to their color confusion lines (protan and deutan chromatic noise). However, for tritan chromatic noise, they were found to have similar results to the trichromats. The use of chromatic noise masking on luminance threshold estimates could help to simultaneously examine the processing of luminance and color information. A comparison between luminance contrast discrimination obtained from no chromatic and high-saturated chromatic noise conditions could be initially undertaken in this double-duty test.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-020-74875-3