When the dark circle in the center of your eye is larger than normal Dilated pupils (mydriasis) can happen for many reasons, such as a normal response to light, medication or drug use, eye exams ...

If you have your pupils dilated for an eye exam, they may stay dilated for several hours. Your eye health provider dilates ...

In most cases, pupils change size based on the light and dilate, meaning that appear larger, when you're in a darker room. But your pupils may also change size based on injuries, drug use ...

People have used body language to communicate since ancient times. Like today, our early relatives expressed themselves ...

Dilation and constriction of the pupils reflect not only changes in light intensity but also ongoing mental activity. The response is a measure of interest, emotion, thought processes and attitudes ...

Two factors, in particular, could reveal a person’s inner state: the length of time it takes the pupil to dilate in response to a flash of light and how the pupil transitions from dilation to ...