The size of our pupils fluctuates as we breathe. They are at their smallest as we start to breathe in, increase steadily to reach their largest size when we are in the middle of breathing out, then ...

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 ...

The pupillary light response helps our eyes see the world around us in various lighting conditions ranging from bright, sunny days to dark, moonlit nights. Like a camera's aperture, this adaptive ...

Robot vision could soon get a boost thanks to the development of a bioinspired eye that can automatically adjust its pupil ...

This study used pupillometry to provide an objective assessment of a form of synesthesia in which people see additional color when reading numbers. It provides convincing evidence that subjective ...

The horizontal axis represents the time elapsed following the presentation of the image, while the vertical axis denotes the degree of change in pupil diameter relative to the image presentation. A ...

You have probably heard the saying that the eyes are the windows to the soul, but new research shows they are also connected to how we breathe. Scientists at the Karolinska Institute in Sweden and the ...