You look in the mirror and notice that the dark circles in the middle of your eyes are bigger than usual. What's going on? Those dark circles are your pupils, the openings that let light enter your ...

Dilated pupils (mydriasis or fixed pupils) are when your eyes' pupils, which let light into your eyes, become wider. This can ...

Eye dilation usually lasts four to six hours, but it can last longer depending on various factors. Light-colored eyes may stay dilated longer after an exam. After an eye exam, you may receive special ...

Mydriasis is the medical term for an unusual dilation or widening of the pupils. There are various causes of this fixed dilation of the pupils. Normally, a person’s pupils dilate when the light is dim ...