The fly's brain is hardly bigger than a pinhead, too small by far to enable the fly's feats if it functioned exactly the way the human brain does. It must have a simpler and more efficient way of processing images from the eyes into visual perception, and that is a subject of intense interest for robot builders. Even today, robots have great difficulty perceiving their surroundings through their cameras, and even more difficulty making sense of what they see.
The way flies process the images from their immobile eyes is completely different from they way the human brain processes visual signals. Movements in space produce so-called "optical flux fields" that characterize specific kinds of motion definitively.
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