I would wager that this upper limit, whatever it is, is context-sensitive. Depending on the details of the scene, and the emotional state of the viewer, the eye

I would wager that this upper limit, whatever it is, is context-sensitive. Depending on the details of the scene, and the emotional state of the viewer, the eye (and the brain) will notice less or more. (Also, many of today's films use very quick cuts, where a significant clip of an action scene is a mere 10 or so, and viewers are likely adjusting to drinking in a lot of visual information in a short amount of time).