A blue glare illusion was perceived to be brightest and caused larger pupil constriction The Department of Computer Science and Engineering at Toyohashi University of Technology formed a research team ...

Scientists from the Max Planck Institute of Psychiatry measured the pupillary reaction of participants while they were solving a task. In healthy participants, the pupils dilated during the task in ...

A compelling study has found pupils respond in the same way to the number of objects in one’s field of vision as they do to light. Experiments revealed pupils dilate in response to images with larger ...

Pupil dilation in reaction to negative emotional faces predicts risk for depression relapse, according to new research from Binghamton University, State University of New York. Researchers at ...

Expand the image above to fill your screen and stare at the black blob in the center. (You can also find the original version here.) Most people perceive the blob as ...

Our eyes do more than just help us see the world—they can also reveal critical insights into our psychological state. Changes in pupil size, shape, and reactivity can sometimes signal underlying ...

The iris is a structure behind the transparent cornea of the eye. It has a circular opening called the pupil that changes size in response to the light level. Your pupils are usually the same size as ...