Scientists have long studied the size of our pupils to understand attention, emotion and even medical conditions. But now, ...

A recent study observed sleeping participants' pupils during sleep, using a new method that could have implications for ...

For the first time, researchers have been able to observe how the pupils react during sleep over a period of several hours. A ...

Scientists have discovered that our pupils continue to change size while we sleep, revealing unexpected fluctuations in brain ...

ETH Zurich researchers found that pupil size changes during sleep, indicating shifts in brain activity. This could help ...

For this reason, pupil size is often used in psychology and neuroscience research as a measure of mental effort and attention. For many decades, these three kinds of pupil response were the only ...

The pupil responds to light, which is essential for our vision and how we see our surroundings. Three known mechanisms change ...

Cornell University researchers have found that the pupil is key to understanding how, and when, the brain forms strong, long-lasting memories. By studying mice equipped with brain electrodes and ...

This is not harmful and does not require treatment. However, a sudden and pronounced change in one pupil size can indicate a medical condition. Medical conditions that may lead to anisocoria ...

In fact, pupil dilation correlates with arousal so consistently that researchers use pupil size, or pupillometry, to investigate a wide range of psychological phenomena. And they do this without ...

For the first time, researchers have been able to observe how the pupils react during sleep over a period of several hours. A look under the eyelids showed them that more happens in the brain during ...

For the first time, researchers have been able to observe how the pupils react during sleep over a period of several hours. A ...