The housefly impresses by its rapid flight feats, which make it so heavy for humans to catch it. Even from the rear is not to be approached to it. She assumes each still so careful movement immediately. How is this possible?

The housefly has a patent: the compound eye. The compound eye belongs to the most amazing watch-organ in the animal world, and the predominant majority of the animals has compound eyes. The two halfspherical eyes consist of a multiplicity - with the housefly approx. 3,000 tiny single eyes. If a housefly would visit planetarium, it could, with the help of its compound eyes, see the entire panorama optically without turning thereby their head.

The single eyes are fine-mechanical masterpieces. Additionally, the housefly possesses the ability to assume up to two one hundred pictures per second separately. In the comparison to that, in the ciname, the human eye cannot separate twenty, with daylight approximately sixty frames per second.

Even the modern technique of our time is not able to design such tiny optical structures as it represents the unit of an insect compound eye.