pseudoscope

The 'pseudoscope' (Wheatstone was partial to exotic forms of speech) was introduced by its professor in 1850, and is in some sort the reverse of the stereoscope, since it causes a solid object to seem hollow, and a nearer one to be farther off; thus, a bust appears to be a mask, and a tree growing outside of a window looks as if it were growing inside the room.

Heroes of the Telegraph John Munro 1889

Make a pseudoscope, a reverse depth perception toy

Boing Boing 2009

In the new MAKE weekend project, Kipkay shows how to make a pseudoscope, an "amazing optical toy that plays tricks on your brain."

Boing Boing 2009

Of course in this practical age the inquiry is put -- Of what use is the stereoscope or pseudoscope?

Chambers's Edinburgh Journal, No. 426 Volume 17, New Series, February 28, 1852 Various 1836

With respect to the pseudoscope -- which makes the outside of a teacup appear as the inside, and the inside as the outside; which transforms convexity into concavity, and the reverse; and a sculptured face into a hollow mask; which makes the tree in your garden appear inside your room, and the branches farthest off come nearest to the eye; and which, when you look at your pictures, represents them as sunk into a deep recess in the wall, -- with respect to this instrument, its practical uses have yet to be discovered.

Chambers's Edinburgh Journal, No. 426 Volume 17, New Series, February 28, 1852 Various 1836