Late response bit would like to add my 2 cents. I have had substantial issues with VOR (see below). This gives me the feeling you describe. It makes it even a bit painful to scan back and forth for instance looking for something on grocery shelves or driving.
Vestibulo-ocular reflex (VOR), eye movement that functions to stabilize gaze by countering movement of the head. In VOR the semicircular canals of the inner ear measure rotation of the head and provide a signal for the oculomotor nuclei of the brainstem, which innervate the eye muscles. The muscles counter-rotate the eyes in such a way that a rightward head rotation causes an equal leftward rotation of both eyes, with the result that gaze direction stays stationary.
VOR works in conjunction with the optokinetic reflex (OKR), which is a feedback mechanism that ensures that the eye moves in the same direction and at almost the same speed as an image. Together, VOR and OKR keep the image stationary on the retina, with VOR compensating for fast movements and OKR for slower ones.
My docs tested this with a vHIT (video head impulse test) which showed severe weakness on the left side. Unfortunately I don’t think doctors appreciate how much this affects your life. It won’t kill you so I just don’t think there is much focus on fixing issues causing it. My opinion is that drugs may help you tolerate this bit i am skeptical they can fix it. I am probably in the minority on this forum but I feel the vertigo related issues from a physical problem with your vestibular system causes the migraine symptoms as your brain tries to deal with bad signals from one side. And the VOR seems an autonomous function that your brain is not normally involved in causing it to struggle
Anyway that’s my opinion for what it’s worth
I’ll add that I am much better at this point 2.5 years from my last attack bit still have balance issues and VOR issues. I tried lots of drugs but found no relief from vertigo related symptoms like VOR issues or from migraine related symptoms (although many on this forum have had relief from migraine symptoms it seems)
What I feel has helped is lower salt diet, and triampterene/hctz (diuretic) to help avoid attacks. I drink lots of water and exercise without pushing too hard. I also carry valium with me at all times and take this if I feel an attack coming on.