Prosthetic Eye

[curious aardvark]

Additive technology PolyJet and 3D printer Stratasys J750 was used for production. Printed core was covered with biocompatible material to create biocompatible surface.

so he used about $250,000 worth of printers and at the time of the article he had NOT coated it with a biocompatible layer.
So after all that - it wasn't even useable.

This is not
1) mainstream
2) actually available to buy
3) possible to do yourself
4) actually made of glass

There is a good chance that in the near future someone will make a machine that can make these in a single process.
But at the moment - no such machine exists.

Glass and a good artist is still your best and cheapest option.