title: A chromatic-cancellation property of human pupillary responses.
abstract: The pupil exhibits a response property somewhat analogous to perceptual red-green cancellation. Across a limited range of flash intensities near threshold, pupillary constrictions evoked by red flashes can be reduced, if not nulled, by the simultaneous addition of a green flash. The percentage of trials on which a stimulus-evoked response can be correctly discriminated from noise also falls to chance level as a green flash is added to the red flash. In terms of the quanta absorbed by L and M cones, the cancellation can be modelled as a function of magnitude of 0.65*L-M.
authors: Department of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock 79430-0001, USA.
authors: E
authors: E
authors: Kimura
authors: R S
authors: RS
authors: Young
mesh_terms: D000465:Algorithms; D003116:Color; D006801:Humans; D008027:Light; D008954:Models, Biological; D010775:Photic Stimulation; D011601:Psychophysics; D011680:Pupil / Q000502:physiology*; D012025:Reflex, Pupillary; D013053:Spectrophotometry; D013997:Time Factors