How often have you stared into a mirror watching your pupil contracting and dilating? It’s a natural mechanism of the eye controlled by the iris, the coloured ring of muscle surrounding the pupil. The pupil will contract and dilate in response to light levels, but other factors can cause the dilation of the pupil. For example, taking drugs like MDMA, cocaine or amphetamines. Plus, the dilation of the pupil could also indicate interest in the subject of attention or sexual stimulation. No wonder

What Drugs Cause Dilated Pupils? #addictionawareness #addictiontreatment | Boca Recovery Center

What drugs cause dilated pupils? #drugs #drugfacts #addiction | Boca Recovery Center