Even w/ the occasional "blip" it sounds like amazing progress Lizzie..hang in there!!! I do have episodes of my eyes twitching..most of the time I think they're just tired, but I'd follow up w/ your doctor if it concerns you or gets any worse. One thing I've found that helps is an eye pillow. I can't remember what's in it, but it's just the right pressure and actually takes pressure off of my eyes..it's heavier than feathers, but lighter than rice. Hot and cold packs can help too..just don't keep them on for long periods of time.
I definitely have times when I can't put two thoughts together and my synapses just don't seem to connect, so I also understand that frustration. It gets worse for me as my pain gets worse, but much better when my shunt is working. I think you just have to rest and work w/ treatment options until you find the right combo. Remember some meds can cause the fog too. You may want to keep a symptom log to help clarify the cause.