Paradoxical pupil responses to isolated M-cone increments
Murray IJ, Kremers J, Mckeefry D, Parry NRA (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 35
Pages Range: B66-B71
Journal Issue: 4
Abstract
M-cone onsets appear dimmer than the background and elicit electroretinograms (ERGs) resembling the light offset response. We sought a corresponding anomalous pupillary light reflex (PLR) using a 4-primary ganzfeld as stimulator and pupillometer. Increments and decrements of white light were compared with M- and L-cone onsets and offsets using silent substitution. Luminance bias (LB) could be added to or subtracted from the cone-isolating stimuli. There was a normal PLR to L-cone increments, but the pupil constricted mainly to M-cone decrements. Changing LB produced a neutral point where on and off responses were balanced. The results reflect ERG and psychophysical studies. This observation may be linked to the antagonistic nature of the M-cone input to cone opponent mechanisms.
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United Kingdom (GB)How to cite
APA:
Murray, I.J., Kremers, J., Mckeefry, D., & Parry, N.R.A. (2018). Paradoxical pupil responses to isolated M-cone increments. Journal of the Optical Society of America A-Optics Image Science and Vision, 35(4), B66-B71. https://dx.doi.org/10.1364/JOSAA.35.000B66
MLA:
Murray, Ian J., et al. "Paradoxical pupil responses to isolated M-cone increments." Journal of the Optical Society of America A-Optics Image Science and Vision 35.4 (2018): B66-B71.
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