Also Search ‘Oscillopsia’.
Everything moves in my vision - could it be MAV?
I too experience this sort of things. Very disconcerting however from all I’ve read it is common amongst people who suffer from any vestibular issues and unfortunately ongoing. It’s not unusual for brief occurrences to happen on into the future. I’ve experienced it on and off for years. I suspect it occurs more often when I am more symptomatic generally but it does still occur even after years of medication.
If you are sure your issues are most probably due to your neck problems do check out Cervicogenic headaches. If unsure suggest you consult a specialist. You may already be aware but most vestibular issues also cause tightness and/or stiffness of the neck so the fact that area might appear to be the cause it could actually be MAV/VM anyway. All a bit confusing initially maybe. Even for specialists to work it out.