Who can tell us what this is a picture of?

Who can tell us what this is a picture of?

Make your best guess about what this is a picture of.

Kudos to anyone that gets it right.

The correct answer will be given in a few days, probably Sunday.

Updates
+1 y
Congratulations! I'm impressed by how many people said it's the closeup of an insect eye, which is correct. Though some said it's a dragonfly, the information that I have (where I got the picture online) is that this is the closeup of the compound eye of a common housefly.
Who can tell us what this is a picture of?
Post Opinion