When praying mantises, dragonflies, ants and other insects peer out at the world, their bulging, compound eyes allow them to see an incredibly wide field of view with an almost infinite depth of field.
Imitating the functionality of an insect eye — which is really a collection of many tinier eyes, known as ommatidia — in a camera has been a long sought-after goal for engineers. Now, camera lenses with wide fields of view, such as fisheye lenses, create distortion around the edges of the image.