Hello,

There is a company that prints the lenses in 3D.
https://www.luxexcel.com/

Bertus

 

My experience with 3d printers is that they tend to be pretty imprecise, very bad at certain structures, and the layers are never really too small. So what allows their 3d printers to work so well and make decent lenses? Or do they not?

 

3D printers vary all over the gamut from cheap to extremely expensive. There's a lot of stuff out there on people making lenses and some of them detail the time and effort it took to get the settings just right. Also, post processing of some kind is usually needed, either partial melting or polishing.