Postdoctoral researcher Lei Li wrote a computer program to create the lens; then he and Ohio State associate professor Allen Yi cut the lens from acrylic glass, a type of transparent plastic, with a diamond blade. The finished product is shaped like a rhinestone, with a flat top and eight surrounding facets. Unlike a gem cut for jewelry, though, these facets are not symmetrical. Each one captures images from a different angle. The images from each facet are then combined on a computer to form the 3-D image.