Because of this 3-word optical phenomenon, still images projected at 24 frames per second seem to be moving pictures
Our concepts of the phi phenomenon and the 
sensory .... of 24 frames per second, exposes each frame to three intervals of 
darkness,... [DOC] [TLE] Why 3D Will Fail Again - Dr. Lex' Site [PAR] The physical world we live in is 3D because three coordinates are required to 
describe ... Each eye sees a 2D image because the eye's retina is 2D.