When I was around 13 years old, I went mountain biking with a friend in California, when I returned, my right Pupil was HUGE and everything was too bright in that eye while my left pupil was normal. I didn't fall or hit my head on the ride. My mom took me to a clinic and the doctor said that it was probably that some Atropa Belladonna had gotten into my eye. I fell asleep at the doctor's for about an hour during observation and the sent me home. The next day, the pupil size had substantially reduced though it was still noticeably bigger and remains so to this day (I'm 30 now and have had no other symptoms). I can't say for sure whether my pupils were equal before the incedent because I hadn't ever felt the urge to compare them before that. My questions are 1) Looking back, the belladonna explanation seems rather unlikely what do you guys think? 2) Does Atropa Belladonna have the ability to permanently dilate a pupil? 3) Has anyone ever heard anything like this before? If so what was it?