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 ...

The article, "Pupil‑linked arousal with very light exercise: pattern of pupil dilation during graded exercise," was published in The Journal of Physiological Sciences at DOI: 10.1186/s12576-022 ...

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 ...

Researchers have identified biomarkers for tinnitus severity in subtle facial movements and pupil dilation that can be captured on video recordings. Until now, there has been no objective way to ...

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 ...

Session ID: 2025-04-21:f60b01a323457a3598451099 Player Element ID: Vd6722e6e_00e5_49ce_898a_1397ecac7c77_6326986478112 ...