I don't know if anything is "typical" with RSD...but in my case they have concluded that it is connected with the RSD. I've read in a few places online that over time you can suffer from blurry vision, dizziness, nausea, ringing in the ears, loss of balance, etc. I didn't have these in the very beginning...they have come on since the RSD spread. My spells of blurry vision can last anywhere from 30 seconds to a couple of hours (this is more rare but has happened and scared the crud out of me). There never really seems to be a cause either except that I seem to get these spells when the pain gets worse throughout the day.