S-cone contribution to pupillary responses evoked by chromatic flash offset.
On a green or red background, the action spectrum of the pupillary responses evoked following the offset of chromatic test flashes shows a prominent short-wavelength lobe and suggests the contribution from photoreceptors other than the previously inferred M- and L-cones (Kimura & Young, Vision Research (1996). 36, 1543-1550), most likely from S-cones. Systematic changes in the shape of the intensity versus amplitude functions with test wavelengths and in the shape of the short-wavelength lobe with response amplitude criteria suggest an antagonistic interaction involving the short- and longer-wavelength photoreceptors.
Kimura
E
E
Department of Psychology, Faculty of Letters, Chiba University, Japan. kimura@esop.1.chiba-u.ac.jp
Young
R S
RS
D003118:Color Perception / Q000502:physiology*; D006801:Humans; D010775:Photic Stimulation; D011601:Psychophysics; D011680:Pupil / Q000502:physiology*; D012025:Reflex, Pupillary / Q000502:physiology; D017949:Retinal Cone Photoreceptor Cells / Q000502:physiology*