Medically reviewed by Bryan M. Wolynski, OD Dilated pupils (mydriasis or fixed pupils) are when your eyes' pupils, which let ...

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 ...

The agency explains that the physiological effects of cocaine include increased blood pressure and heart rate, dilated pupils, and insomnia. Widespread abuse can lead to sudden cardiac arrest ...