They also keep making references to an eye clinic. Ocular implants?Simulation implied, but I'm not convinced it makes sense. How are people accessing the sim? It was said that some people can see it, others can not. There's the bit about disappearing if you leave. And not eating the food. Those suggest some material rules, not virtual rules.
Here's a theory- Brain nanites.
Initially it seemed to be tied to the snake guy clinic, but apparently he doesn't know anything either...They also keep making references to an eye clinic. Ocular implants?