I would say. don't worry. As Nigel says, vision does go a bit odd. I have, on occasion, have a hypo, got blurry vision, only to recover and then go high, and get blurry vision from that..yoyo!
If its still blurry 2mro, go and see someone. Assume that you don't have floaters etc? If so, call the eye clinic and get an emergency appointment, but if not, probably nothing to worry about.
Also, when you were low, and having the hypo stop (hate the stuff!!, makes me sick every time) you didn't bang you head or something that if you were shaking a lot? Unlikely, but didn't want to ignore the possibility of concussion!
Take care