Standard camera lens mimic the inner working of human eye, an incoming beam of light passes through a lens, which focuses and bends it onto a retina. Eyes on mammals typically have far more limited field of view, but insects like flies enjoy expansive panoramic vision. The prototype lens has 180 miniature lenses and about 1.5 centimeters in diameter. As comparison, dragonflies have 28,000 miniature lenses occupying a much smaller space.