During eye movement task, pupil dilation and constriction patterns occurred repeatedly, wavy curve was produced to display the trajectories of changes in pupil diameter over time. The frequency domain ...

In the bright light, pupils constrict (narrow) to prevent too much light from entering the eye and causing a "white out." The pupil is not the same thing as the iris, the colored structure behind the ...

Ádám Albi at Budapest University and Péter Pajkossy at the University of Szegad set out to explore whether there are differences in the amount of pupil dilation when a person recognises something as ...

An abnormal PERRLA result would mean that one or both pupils are not constricting or dilating (widening) as expected. The constriction or dilation may be excessive, insufficient, or completely absent.

a short constriction of the pupil (lasting a few hundred milliseconds) followed by a 1-2 second pupil dilation. By comparing the time course of each pupil dilation to the time it took participants ...

Fast spontaneous pupil constriction and dilation correlate with large-scale brain activity as well but not perceptual behavior. Our results illuminate the relation between central and peripheral ...