Medically reviewed by Christine L. Larsen, MD Medications, trauma, and medical conditions can lead to abnormally small pupils ...

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

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

The pupils, those small black circles at the center of our eyes, could well become a key to understanding sleep. A team of ...

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

It was previously believed that our pupil size was only affected by three things: light, focusing on nearby objects and cognitive effects.

While their eyes may look different, this is the body’s natural response to symptoms of mania or hypomania which could lead to increased energy levels and symptoms of psychosis. You’ll find ...