I've heard of this before, including a first person account, and the effects are apparently that specific. Lots of people consistently report the same thing. It's not just moving patterns, it's actually a bunch of tiny people running around, climbing on the furniture, etc.

I'd be asking if the back record had hyper specific reports of people in clothing which was period appropriate for how "little people" are ideated, or if instead they were tiny angels and daemons (or skeletons) because how you culturally project what you see would inform how they describe it.

I very much doubt that in future times, people will be reporting seeing tiny people in North Face fleece tops and leggings, or with Asymmetrical haircuts and goth make-up but you never know..

This sounds like the HBO Common Side Effects almost to a tee