Because of the limitations of our ability to perceive our surroundings we have built up a system of coded patters to get through daily life. If those codes are disrupted, we go into instant problem solving adrenalin mode in order to find new patterns of meaning to latch onto. Therefore, creating these disruptions is a good tool for creativity. The easiest disruptions are ones that take advantage of our limited visual perception, similar to the tricks of a magician. A Stereoscope takes advantage of errors in our binocular vision to make duplicated photos look 3d. We can take the same device to disrupt our binocular vision patterns, and thereby sparking our imaginations.
Above: My design for stereoscopic fisheye glasses.