Instead, these fluctuations in pupil size show that even during sleep, the brain is constantly switching between a higher and lower level of activation. These new findings also confirm for humans ...

Pupil size is controlled by the brain ... letting in more or less light as needed. 2. Medication "Certain medications can interfere with the messages from the nerves that tell the pupil to ...

"Miosis" is a medical term that describes the constriction of the pupils. Learn its causes, symptoms, and how to treat it.

In fact, pupil dilation correlates with arousal so consistently that researchers use pupil size, or pupillometry, to investigate a wide range of psychological phenomena. And they do this without ...

In this Healio Video Perspective from the ESCRS winter meeting, Pavel Stodulka, MD, PhD, speaks about the role of pupil size ...

Scientists have long studied the size of our pupils to understand attention, emotion and even medical conditions. But now, new research has surprisingly revealed that they change size in sync with ...