Machine Reveals New Color Spectrum

In 1983, scientists created a machine that temporarily allowed people to see new colors outside the regular color space. It was an eye-tracker device with vertical stripes of red and green (or yellow and blue) that tracked involuntary eye movements, adjusted mirrors to keep the image stable on the retina, and caused the edges between the stripes to disappear, allowing the colors to flow into each other in the brain's visual cortex and produce entirely new colors.