Noticed while reading that some letters were getting blocked out by a blurry spot that moved with the eyes.
No other noticable symptoms. It was very disconcerting so I closed each eye separately, and noticed that the spot did not move, and was there for both eyes. The spot was small at first and seemed to have a prismatic effect, although clear it blocked vision in the area. Eventually, the spot started expanding, and disappeared in about 20-30 minutes.