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 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 look under the eyelids ...

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

The eye has many parts, including the iris (the coloured part), the pupil (the opening in the middle of the iris), and the lens (the transparent structure inside the eye). Most studies have tended ...

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

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

Nocturnal animals tend to have proportionally bigger eyes than humans do. They also tend to have pupils that open more widely in low light. So, at the outset, nocturnal eyes gather more light than ...

If evolution occurs through gradations, the critics say, how could it have created the separate parts of the eye -- the lens, the retina, the pupil ... a double-layered transparent tissue ...

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 ...