Having abnormally small pupils may indicate a health problem. The pupil, the dark center of the eye, determines how much light reaches the light-sensing retina at the back of the eye. Muscles in the ...

Summary: A new study reveals that pupil size fluctuates constantly during sleep, reflecting changes in brain activation levels. Researchers developed a novel method to keep test subjects’ eyes open, ...

Choose from Pupil Eye stock illustrations from iStock. Find high-quality royalty-free vector images that you won't find anywhere else. Video Back Videos home Signature collection Essentials collection ...

The pupil is the opening located in the center of the iris of the eye. It controls the amount of light that enters the eye so that you can see clearly. The pupil size is controlled by muscles of the ...

Having abnormally small pupils may indicate a health problem. The pupil, the dark center of the eye, determines how much light reaches the light-sensing retina at the back of the eye. Muscles in ...

Human eye iris contracting. Extreme close up. Extreme close up human eye iris Human eye iris contracting. Extreme close up. eye dilation stock videos & royalty-free footage Human eye iris contracting.

You have probably heard the saying that the eyes are the windows to the soul ... It suggests a deeper connection between breathing and the nervous system than we previously realised. The next big ...

Pupils at a special school have opened a new charity shop to help raise funds for vital equipment and trips. The students at ...

Flash photos typically produce a red reflection in people’s eyes, but sometimes that reflection can appear white or gray, ...

Bigscreen has just revealed the Beyond 2, a custom-fit virtual-reality headset with a 116-degree field of view it claims is ...

Jackson Jobe was a teenager when he started pitching lessons with Alex Marney in an Oklahoma barn. Now Jobe and PitchingWRX ...