Medically reviewed by Andrew Greenberg, MD Dilated pupils (mydriasis) occur when the pupils open larger than usual. This normally happens in darker lighting to allow more light into the eye, but ...

Pupil dilation normally indicates an increase in cognitive demand (Szulewski, Fernando, Baylis, & Howes, 2014). Lying causes an increase in cognitive demand (Vrij, Granhag, & Porter, 2010).

Now a study in Attention, Perception, & Psychophysics suggests that working memory (the executive function that lets us process, remember and use information) correlates with pupil size, too.

Takeaway The pupil is like a camera aperture—it gets bigger or smaller depending on how much light is needed, but it can also constrict or dilate based on a "fight-or-flight" response. For ...

Eyenovia (NASDAQ: EYEN) stock rose ~4% on Tuesday after the company said the U.S. Food and Drug Administration (FDA) accepted for review its resubmitted application seeking approval of MydCombi ...

HARMAN’s eye and pupil tracking technology keeps drivers safe by continuously monitoring cognitive load, an industry-first for Advanced Safety (Graphic: Business Wire) ...

Eyenovia Inc said on Monday the U.S. Food and Drug Administration (FDA) had approved its pupil-dilating spray to be used with the company's proprietary drug delivery device during eye examinations.

To examine the safety and efficacy of a half dose, or one spray, of MydCombi (1% tropicamide and 2.5% phenylephrine ophthalmic solution, Eyenovia) using the Optejet dispenser (Eyenovia) for pupil ...