According to researchers Jack Cowan (of the University of Chicago) and Paul Bressloff (of the University of Utah) visual hallucinations reflect “the pinwheel pattern of brain cells that process lines, curves and other geometric shapes, providing a remarkable view of the physical architecture of the visual cortex.”

“It’s almost like seeing your own brain through a mirror,” Cowan said. “You’re basically seeing patterns that your own brain is making.”

Dance Safe: Seeing More Than Meets the Eye

(via Barbelith).