After staring off into the Eye of Sauron for about 10 minutes, I was awash with a profound sense of the creeps. But I was also gifted an excellent lesson in pupil dilation, an equally mysterious ...

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 ...

Making up about 15 percent of cases, could your eyes warn you of the disease? One surprising sign you might have lung cancer is if you have a small pupil in one of your eyes, testified WebMD.

But opioids can cause pupillary constriction, or miosis. This means the pupils at the center of the eye become very small and may stop responding to changes in light levels. Many factors can cause ...

They’ll move a small flashlight back and forth in front of your eyes while you look straight ahead. They may do this a few times to see if your pupils react to the light. Lastly, your doctor ...

Pinpoint pupils occur when the pupils shrink to a small size. This can be due to various conditions and medications, such as prescription opioids, hypertension medications, and eye inflammation.

Goats have the worst eyes. Those horizontal slits are really creepy ... like snakes and small cats — have vertical slits in their eyes, while other predators have round pupils.

“With a small pupil, less light enters the eye,” Spitschan says. In the lab, researchers can isolate specific aspects of light, such as intensity or wavelength, as they measure the pupil’s ...