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Just looked through my pair... 
The field of view is roughly oblong, not at all circular... 
But if you look closely, it's really 2 mostly overlapping circles -- your peripheral vision just has crappy resolution when you're looking at the middle.
The main thing unrealistic about the movie version is the overlapping parts all look the same as the rest, whereas in binos the overlap is 3d but the non-overlap isn't.