Just to let you know--in some people especially contact lens wearers, very light colored iris (blud, green, gray) or with a irritated or scratched cornea the ingredients in some over the counter eye drops can dilate the pupil. Naphcon A is one of them.
JCH III MD Eye MD
I am sure it was the Naphcon A. It has taken almost 4 hours before my eye return back to normal.