Sounds like the eventual end. Will be learning how to take raw circler optical lenses. As the optical centres do. And build the tools for folks to shape them at home.

Such a project would be a huge advantage to many 3rd world environments. And would likely be about embedding quality glass cutting blades etc into 3d printed frames/mechanisms. Likely from PA. With the ability to embed metal rods and gears where stability, strength is needed.