An eye made for friends at Protocrate.
Made it to test and show an example of modeling fitted 3d printed pieces based on tested tolerances, Plus the idea to use an LED with the Red PETT was just to fun!

The Pupil has a cavity for the 5m LED to press fit into.
Then the pupil snaps into the Iris from bottom to top.
And that then snaps into the base from top the bottom.

One can do this in pretty much any order but the inner diameter of the holes are tapered to disallow the matching piece to go all the way through.