ST. LOUIS — Google searches for "hurt eyes" spiked nationwide on the day of the total solar eclipse on April 8. NASA and doctors across the nation repeatedly warned the public about wearing necessary ...

The way the brain regulates pupil size is different from previously thought: fundamentally responsible is the neurotransmitter orexin, as researchers at ETH Zurich have now shown. This discovery could ...

The iris is a structure behind the transparent cornea of the eye. It has a circular opening called the pupil that changes size in response to the light level. Your pupils are usually the same size as ...

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 ...

You have probably heard the saying that the eyes are the windows to the soul, but new research shows they are also connected ...

Researchers at Karolinska Institutet in Sweden have discovered a fundamental mechanism that affects the size of the pupil, namely our breathing. The study, published in The Journal of Physiology, ...

“The effect was so strong, we knew immediately that we were onto something important,” recalls Nikola Grujic, a postdoc in the Neurobehavioural Dynamics Laboratory at ETH Zurich. Through a series of ...

Arousal is a fundamental part of how our brain keeps us alert, engaged, and responsive to the world around us. It is controlled by networks deep in the brainstem, like the locus coeruleus (LC), which ...