I have always understood from my ENT that the visual triggers were a MAV component to my MD diagnosis. The effects have always been very similar, and my way of dealing with them is the same – lie or sit still with eyes closed until the vertigo passes. He prescribed Pizotifen, since when the incidences have been rare. Of course, the other (and probably more important) factor is that experience teaches us to avoid the triggers in the first place. For me that has included;
Jerky camera work on TV (news items with running cameramen and mobile phone footage).
Some slewing vehicle and wheel motions on TV.
Swirling and gaudy graphics on TV.
Long intense computer sessions.
Constricted view walkways including long hospital corridors, supermarket aisles, narrow brick walled alleyways.
Driving at night on a deserted motorway.
I haven’t tried a fairground ride and I don’t intend to!

Visual preference is a product of a compromised vestibular system. The brain adapts to be more reliant on eyesight. Hence the problems when the room is plunged into darkness. My ENT does the Unterberger test on my visits and my failure to remain on, or even near, the spot is always a revelation.