>>715958326The human eye, sure. Three photons is enough to trigger a photoreceptor. The brain, not so much. Past a certain point, you're not seeing the whole frame, you're seeing the change from the previous frame.
Which ironically, doesn't make this sort of artifact any less visible to humans.
What I'm saying here is that how many frames the human eye can see per frame is clearly irrelevant, the real world has infinite frame rate.