3-D vision is an abstraction that our brain recreates in our heads from 2 different 2-D images(left and right eye). The brain processes the deviations between each image to make a best guess at how the world around it should be perceived, in 3-D. So what happens when those separate images are artificially switched before entering our eyes(ie. from using 3-D goggles). Our brain is still receiving the same images, but the expected parallax deviation is reversed in each eye. How does the brain interpret what it sees? I assume that there have been many experiments done on this.