Pupils Equal and Responsive

A weird thing happened yesterday: I was standing in front of the bathroom mirror after showering, about to put some eye gel on under my eyes, when I noticed that my right eye was completely dialated, and my left eye wasn't. When I'd woken up about an hour earlier, my right eye felt a bit swollen, as if I'd gotten some cat dander in it, so I'd put some anti-allergy eye drops in. I'd never seen anything like this happen, though. I put some eye drops in the other eye to see if that made any difference. Nada.

I tried opening and closing my eyes a few times to see if I could get the right pupil to react to light. Nothing. I tried covering one eye and then the other to make sure I could still see normally, and I could. Hmm. The fact that I could see had to be a positive, but the phrase "pupils equal and responsive"—a phrase everyone who's ever watched a medical drama on TV would recognize as a good sign—kept running through my head. If equal and responsive was a good thing, surely unequal and only one responsive had to be something bad.

A short while later I developed a headache, though whether it was because of the additional light going through the dialated pupil, or because the dialated pupil was a symptom of a migraine, I have no idea. I seem to have a migraine hangover today, though, so I'm thinking that I was probably asleep when the blurry vision stage hit. Since that's the surest warning I have of an impending migraine, when I sleep through it, it's sometimes hard to figure out where the crushing headache, neck pain, and/or nausea came from. This'll be the first time I've ever noticed a single dialated pupil during a migraine, though.

This morning my right eye still feels a little weird, and as I noted, I seem to have a migraine hangover, but otherwise my pupils are almost equal and responsive to light. I'm hoping it was a fluke.