This is an x-ray projection of the ocelli and compound eyes of a hoverfly (Eristalis tenax). It was imaged at the I13 beamline at the DLS.
<a href="//commons.wikimedia.org/wiki/User:Gavin_Taylor_(LU)" title="User:Gavin Taylor (LU)">Gavin Taylor (LU)</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>