I've heard that some frequencies can also wobble your eyeball in just the right way to create visual distortions. Not as in straight up creating ghost images, but similar to what happens when you press on your eyeballs and your vision can become blurry or shift
https://www.frontiersin.org/journals/behavioral-neuroscience...
Scienceblog.com is an extremely low quality site. Looks like an old content farm ‘splog’ that upgraded from markov chain nonsense to LLMs.
I believe it references that article, too