I have been experiencing a similar problem to yours, Brock. Mine occurs when I am hot and/or tired. I just feel like my eyes are not working properly together...no double vision, but just not right.
I chalk this up to subtle alignment problems with my eyes. I assume this is due to my faulty nerve conduction and affecting my eye muscles that control movement, not my optic nerve. It can be quite disconcerting, but unless you are experiencing double vision I would not worry too much.
Thank you, MS, for this exciting side effect