Kind of related: most people can generate a stereoscopic image by crossing their eyes https://stereo.gsfc.nasa.gov/gallery/crosseyed.shtml https://stereo.gsfc.

Kind of related: most people can generate a stereoscopic image by crossing their eyes https://stereo.gsfc.nasa.gov/gallery/crosseyed.shtml https://stereo.gsfc.nasa.gov/gallery/crosseyed.shtml