Dilated pupils, or pupils that are larger than normal, have many causes. Injury, a medical condition, or drug use are a few causes of this condition. (Photo Credit: Moment/Getty Images) ...

Frog and toad pupils come in quite the array, from slits to circles. But overall, there are seven main shapes of these animals’ peepholes, researchers report in the Aug. 25 Proceedings of the ...

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 ...

There is experimental evidence that adrenaline solutions can cause pupil dilation. In a small 2015 study published in the Journal of Ophthalmology, 18 cataract patients were given 1 milliliter of ...

Princeton University psychologist Daniel Kahneman showed several decades ago that pupil size increases in proportion to the difficulty of a task at hand. Calculate nine times 13 and your pupils ...

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 first version, posted June 28, 2006, is a less edited version of the eye, which shows harsher lines around the second iris and pupil – consistent with a digitally manipulated image.

The prospective study included 103 patients with a mean age of 64 years. Pupil ruff atrophy grading, IOP, cup-to-disc ratio and presence of pseudoexfoliation material were evaluated.