In:
Journal of the Optical Society of America A, Optica Publishing Group, Vol. 37, No. 4 ( 2020-04-01), p. A163-
Abstract:
M-cone stimulation induces a pupil constriction to stimulus offset, whereas, with L cones, the pupil responds conventionally with a constriction to onset. To test the possibility that this paradox is linked to the L : M ratio, we measured the strength of the effect by injecting a variable amount of positive or negative luminance contamination on either side of M-cone isolation and identifying a balance point at which the pupil responded equally to onset and offset. Nineteen individuals were recruited. In observers with low L : M ratio, the paradoxical effect was weak. There was a significant relationship ( r 2 = 0.561 ) between the balance point and L : M ratio. The effect is likely to be linked to strong inhibitory signals associated with cone-opponent pathways.
Type of Medium:
Online Resource
ISSN:
1084-7529
,
1520-8532
DOI:
10.1364/JOSAA.382262
Language:
English
Publisher:
Optica Publishing Group
Publication Date:
2020
SSG:
24,1