I went off Depakote as soon as the vision problems occurred,
and had to totally discontinue the
Lamictal until the vision problems went away (resulting in a mixed bipolar episode). I went back on Lamictal, and soon returned to a stable state.
A few days ago, I went on a run and pushed it hard. When I stopped and took off my sunglasses, I had double vision again - I walked back - and it took nearly an hour for my vision to return to normal.