For over a century, scientists believed that light, focus distance, and cognitive effort were the main forces behind changes in pupil size. But a new discovery adds breathing to that list. Researchers ...

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 ...

Visual illusions of motion are a major source of interest in the vision research community. Explaining how a still image can produce an illusory perception of motion is important for a more complete ...

The eye of the sleeping subject was kept open with a special fixation device to record the pupil movements for several hours. Our eyes are typically closed when we sleep. However, there is a flurry of ...