The size of your pupils varies throughout the day, but most people’s pupils fall within a particular size range. We’ll look at when and why your pupils change size. First, the range of “normal” pupil ...

Please provide your email address to receive an email when new articles are posted on . For all people, pupil size has an important role in balancing incoming light with depth of field to optimize ...

Pupils are a rich source of social information. Although changes in pupil size are automatic and uncontrollable, they can convey interest, arousal, helpful or harmful intentions, and a variety of ...

Please provide your email address to receive an email when new articles are posted on . Smaller pupil area measured in patients with acute HF was predictive of all-cause mortality and HF readmission, ...

It is commonly known that pupil size fluctuates in response to brightness and darkness during wakefulness. What is less commonly known is that pupil size is also regulated by the autonomic nervous ...

The precision with which people make decisions can be predicted by measuring pupil size before they are presented with any information about the decision, according to a new study. The precision with ...

It has been said that “the eyes are the window to the soul,” but new research suggests that they may be a window to the brain as well. We first uncovered this surprising relationship while studying ...

When people are awake, their pupils regularly change in size. Those changes are meaningful, reflecting shifting attention or vigilance, for example. Now, researchers reporting in Current Biology on ...

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 ...

"Why don't your pupils ever move?," asked Meghan Rolston, 11, a fifth-grader at Butterfield School in Libertyville. In a split second, your brain makes millions of decisions about information gathered ...

Add Yahoo as a preferred source to see more of our stories on Google. You have probably heard the saying that the eyes are the windows to the soul, but now it turns out that they are also connected to ...

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 ...