Scanning electron micrograph of the Drosophila compound eye. Close-up shows the multi-faceted cornea (pink) and the thin, hair-like structures called setae (green) which are believed to reduce glare.

Projection a series of confocal images of the eye of a commmon blue damselfly. This projection shows the regular, crystal-like architecture of the eye of the Enallagma cyathigerum, an active visual pr...