The pupils of our eyes get larger when we are focusing on a task–and the size may give clues about our working memory capabilities, a new study has found. A person's pupils dilate in low-light ...

The affected side's pupil is usually dilated and reacts slowly to light. Adie's pupil is more common in women. Horner's Syndrome. This is a disorder of the nerves of half the face and eye.

While dilated pupils are less common, there are plenty of other explanations for them. Maybe they just came from the optometrist, where they had their eyes dilated.

The idea of large pupils being attractive isn’t new. During the Renaissance in Italy, women used eye drops made from a poisonous plant called Atropa belladonna (belladonna means “beautiful woman” in ...

Normally, a person's pupils naturally widen (or dilate) in low-light environments to allow more light into the eye. However, in a new study, researchers reported that a person's pupils also dilate ...

Then came a curious discovery in the 1970s: people’s pupils also dilated when they recognized something they’d seen before. This phenomenon, called the “ pupil old/new effect,” has since ...

Close up on dilated pupil. (Courtesy of Big Stock Image) This story is from The Pulse, a weekly health and science podcast. Find it on Apple Podcasts, Spotify or wherever you get your podcasts. The ...

The study team found that people were more attracted to animals with dilated pupils and bright irises. Cognition and Emotion Folks involved in the study rated primates with brighter irises as ...

They reflect what we are feeling. However, it is only one piece of the puzzle. Dilated pupils do not always mean that someone is interested in you. If you want to know if someone likes you, just ask.

In miosis, the pupil is smaller than it should be, even in darkened conditions when it would typically expand (dilate). Having abnormally small pupils may indicate a health problem.

Allison came home last night complaining that her eyes felt weird and that she was having some trouble focusing. I went and looked at her eyes, and noticed that one of her eyes was way dilated ...