pupillary dilation
"As soon as this medicine was put into my eyes I felt an intense burning sensation in my eyes. Approximately 5 minutes after the drops had been put in I began feeling jittery, uneasy, and my head felt very strange. I couldn't see up close at all for over 4 hours, but that's a given whenever having your eyes dilated. I don't know if this was a psychosomatic effect or not, but I felt very out of it and my hearing was affected as well. I remember when the doctor was speaking to me after the exam had been completed my hearing was going in and out, kind of like I was in a long tunnel. Overall, this experience scared me, and I'm not sure if I would want to have this done again. Although, I am glad that by doing this I now know my eyes are healthy."