[Ghostbusters] Other types of Sci-Fi devices like Ecto Goggles?

In the movie Ghostbusters, the main cast uses Ecto Goggles to see the ghosts. There is also a substance called Dicyanin which has a conspiracy surrounding it, which allows you to see spirits.
My question is, what are other types of ocular devices throughout sci-fi genre which allows one to see spirits/ghosts, or demons? I'm looking for names.