title: One blue colour channel or two?
abstract: Contrary to the general belief that the yellow-blue mechanism has lower spatial resolution than the red-green mechanism, it has been recently claimed that both mechanisms have similar spatial sensitivity (McKeefry et al, 2001 Vision Research 41 245-255). Studying high-spatial-frequency tritanopia (a colour illusion based on spatio-chromatic interactions in human vision), we found strong evidence for the existence of two blue mechanisms-with low and high spatial-frequency resolution. If confirmed, this may resolve the apparent paradox concerning spatial resolution of the yellow-blue mechanism.
authors.affiliation: Department of Vision Sciences, Glasgow Caledonian University, Glasgow G4 0BA, Scotland, UK. A.Logvinenko@gcal.ac.uk
authors.forename: Alexander D
authors.initials: AD
authors.lastname: Logvinenko
authors.forename: Sara J
authors.initials: SJ
authors.lastname: Hutchinson
mesh_terms: D003118:Color Perception / Q000502:physiology*; D003119:Color Perception Tests; D005260:Female; D006801:Humans; D009903:Optical Illusions; D011601:Psychophysics; D013028:Space Perception / Q000502:physiology