Sometimes they’ll put medicated eye drops into your eyes to dilate them and make it easier to see into your eyeball. If you notice any sudden change in the size of your pupils and there’s no ...

There's an average pupil size that's considered normal. Measured in millimeters, your eyes' pupils can change based on light, medications, and even emotions.

A dazzling new photo from the Hubble Space Telescope shows a "celestial eye" in the sky. Skip to main ... center could pass as a glimmering pupil, ... sky about 4,900 light-years from Earth, ...

During the test, your doctor will make sure your pupils are in the right part of your eye. Equal. Your pupils should be the same size. If they aren’t, your doctor will do more tests to find out why.

ABERDEEN PROVING GROUND, Md. --A team of Army and academic researchers are investigating how eye-pupil size changes can indicate a person’s cognitive state as a means to enable teaming with ...

The striking two-pupil eye in the Facebook post was first published online to Flickr in 2006, where two versions of the image were shared by the same creator.

In the video you can see the eye lag behind detecting the person, but you can also see the iris and pupil appear to bounce as they move. This can happen if the motors are too weak or the load is ...

Each induces a slight, irrepressible expansion of the pupils in our eyes. For more than a century scientists have known that our eyes' pupils respond to more than changes in light.

Circular vs. slit pupils One consequence of having extremely light sensitive eyes, is that they must be adequately protected during the day. Some animals accomplish this with a retractable eye flap.