Unnamed Device

Here you can see how the inputs are switched. It's hard to get both tracks visible with only one eye (the camera, in this case) but from far enough away you can see a tinge of blue on the inside of the right eye hole, and one of red on the opposite side. So, does it work?

 

Well, when you look through it it takes a bit of effort to focus on anything at first. I was very conscious of the fact that I had to cross my eyes further to see things that were farther away, which was awkwardly opposite to normal experience. However, this did not necessarily in itself create a real illusion of inverted depth. Unfortunately, there are a myriad of cues which your brain uses to calculate depth - objects overlapping, objects larger or smaller than expected, shadows of objects crossing over others, and even general dimness of farther-off objects when in even lighting. When all of these are removed from the equation, however, it DOES work! I tested it by stapling four strips of paper together at both ends, creating a small spherical mobile that can spin when hung. When looking through my device, the strips at the back (which are visible through the gaps between those in front) appear to be in front, and vice versa. This creates a very convincing illusion that it is spinning in the opposite direction than it actually is. I actually thought it wasn't working at first, so sure was I that I was seeing it spin normally. Upon closer inspection, the strips at the "back" of it can be seen to suddenly cross in front of the other strips when they overlap as it spins. Very bizarre.

Done