Medically reviewed by Johnstone M. Kim, MD Key Takeaways Mydriasis is when the pupil stays wide and doesn’t respond to ...

Add Yahoo as a preferred source to see more of our stories on Google. Pupils often dilate in response to low light.Radu Bighian/Getty Images Dilated pupils mean that your pupils appear larger in size.

His gaze softens as he draws closer to you. With one hand around your waist and the other cradling your jaw, he pulls you in. You look into his eyes, and notice his pupils have grown large and hungry.

When people encounter new information that challenges their expectations, their pupils are likely to dilate. This physiological response is a sign that something is happening in the brain to help the ...

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 ...

Pupils are the black circles located in the center of your iris, or the colored part of your eye. The pupil allows light to enter your eye and often changes in size. When your pupils appear larger, ...

The size of your pupils can say a lot about your health and your state of mind. In most cases, pupils change size based on the light and dilate, meaning that appear larger, when you're in a darker ...