This is a picture of my right eye, approximately 2 hours after application of a .5% tropicamide solution. This drug causes the sphincter muscles of the iris to relax, causing the pupil to dilate to the size of an eggplant, enabling the doctor to peer around the inside of my skull, and also providing a handy place to store my car keys.
Subsequent research indicates that tropicamide passes, in small quantities, into breast milk. It’s a good thing I’m not lactating!