didn’t work on me but I have trouble focusing for more than 2-3 seconds at a time at these things. I stayed for a count of 30, but I had trouble sticking with the + without moving back and forth quickly. Also legally blind in one eye (birth) and an eye doc once said I have fewer “3D cells” because of it.
So there’s probably something related in all that. I dunno. But they looked to have the same amount at the bottom. I’m also super good at intuitive math for no reason… so I dunno – didn’t work on me but I can see how going from less to more makes it appear more numerous than going from more to less, at least intellectually, even if I didn’t experience it. Neat!