Satori (Crosseye Stereoscopic 3D)

(Switch to anaglyph stereoscopic 3D)
To view the crosseye stereoscopic animation below, simply cross your eyes until the left and right images converge in the center. It helps to keep your head still and level. Despite feeling a bit awkward, opthamologists actually use this method to strengthen the eyes. (It's probably worth mentioning that I am not an opthamologist... Your mileage may vary.)