Phasic pupil responses to melanopsin- and cone-directed stimulation remain stable across circadian time
Hannah Sophie Heinrichs, Diana Glebowicz, Manuel Spitschan
The paper examines circadian modulation of pupil responses to different photoreceptor pathways and finds no support for circadian modulation of phasic pupil tracking.
bioRxiv · Oct 19, 2026 · PreprintNeuroscience