This fly has a very unique eye construction. but this animal has compound eyes which occupy most of its head and also three eyes between two compound eyes. Because of this compound eye, this fly also has excellent sensory awareness and its ability to maneuver deft air. This is the reason why flies are so hard to hit. The eye of a fly consists of a pair of large complex eyes. Each eye of the complex consists of 3000 to 6000 simple eyes. This fly cannot focus its attention on a particular object in the surrounding environment, but this fly actually has a view almost towards all directions. In addition, this fly also has three simple additional eyes called ocelli. Ocelli is located between two compound eyes. The function works like a compass, with this eye this fly can know the direction of flight. Ocelli can work optimally in sunlit areas.