Venonat #048

Diptera have large compound eyes composed of thousands of photoreceptors each having a cornea and lens. These photoreceptors are positioned in slightly different directions, allowing for a wide viewing angle and fast reaction time.

The compound eye of a grey drone fly

Micrographia by Robert Hooke

A female black fungus gnat

EBKauai (CC BY 2.0)

Butterfree may have been the original evolution of Venonat.