What Is The Cause Of Double Vision And Slurred Speech?

I had a sudden onset of vision changes, double vision, pictures on the wall sliding up and down crown molding on wall being where is really is plus also below that it appeared to be angled TV on table was there as well as next to it was another TV but it was also angled. Slurred speech and inability to stand by myself needed assistance to walk. All test, blood pressure, MRI where great. It lasted about 3 hours at the hospital. Then suddenly went away.