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

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

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

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 ...

Another goal is to make the technology usable outside of sleep laboratories, such as in hospitals where it could help to monitor waking in coma patients or to diagnose sleep disorders more accurately.

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

The researchers’ biggest concern was that the test subjects would not be able to sleep with their eyes open. “But in a dark ...