Rod hue biases for foveal stimuli on CRT displays

Signals from rod photoreceptors bias (shift) the hues determined by cone photoreceptors for extrafoveal mesopic stimuli, creating green, blue, and red rod hue biases at long, middle, and short wavelengths, respectively. The fovea contains far fewer rods and S cones but may not be immune to rod hue biases. Here, we determine the biases found for mesopic foveal stimuli presented on a CRT display. The rod green bias was observed at unique yellow for all but one observer with 2° tests and persisted for most observers with 0.5° tests. The rod red bias typically seen at unique blue in extrafoveal studies was not apparent for either size of foveal test stimulus, and it was sometimes replaced by a rod green bias. The rod blue bias typically seen at unique green and unique red in extrafoveal studies was weak on average and inconsistent for both sizes of foveal test stimuli. Thus, small mesopic foveal stimuli permit rod influence on M- and L-cone color pathways but disadvantage rod influence on S-cone pathways, perhaps because of the sparseness of foveal S-cones. However, some observers did show idiosyncratic foveal rod hue biases that do not follow the general trends.

Medienart:

E-Artikel

Erscheinungsjahr:

2014

Erschienen:

2014

Enthalten in:

Zur Gesamtaufnahme - volume:31

Enthalten in:

Journal of the Optical Society of America. A, Optics, image science, and vision - 31(2014), 4 vom: 01. Apr., Seite A23-6

Sprache:

Englisch

Beteiligte Personen:

Foote, Katharina G [VerfasserIn]
Buck, Steven L [VerfasserIn]

Links:

Volltext

Themen:

Journal Article

Anmerkungen:

Date Completed 10.12.2014

Date Revised 21.10.2021

published: Print

Citation Status MEDLINE

doi:

10.1364/JOSAA.31.000A23

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM237009951