24fps is not based on persistence of vision. Persistence of vision exists at 23fps or 22fps and lower for some people. 24fps is an historical artifact of the fi

24fps is not based on persistence of vision. Persistence of vision exists at 23fps or 22fps and lower for some people. 24fps is an historical artifact of the first few generations of motion picture technology. It is maintained because humanity has grown accustomed to 24fps in theaters for film material. With the advent of video (video tape) and prolific 30fps material (60i material), many people perceive film shot at 30fps to be video and vice versa. Ultimately, it is an aesthetic.