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 ...

Researchers have investigated the impact of 10-min very light exercise on pupil size and prefrontal function. Their findings provide the first evidence that changes in pupil size during exercise can ...

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 ...

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 ...

Our eyes are more than just windows to the world—they're also mirrors to our minds. Here is an interesting fact that you will ...

Martin Schaefer is affiliated with Karolinska Institutet. 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 how we ...

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 ...

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 how we breathe. Scientists have long studied the size of our pupils ...

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 ...

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 ...