Reply #7: It's an Einstein quote

[caraher]

Einstein objected to any theory that involved nonlocal interactions, which he dubbed "spooky action at a distance." To say the human eye can "detect spooky action at a distance" is somewhat misleading, as the nonlocal interaction is something one infers from the results of experiments rather than something directly seen (or even glimpsed). What the OP refers to is really just that the human eye is sensitive enough to small numbers of photons to be useful in principle as a detector in such experiments.