Fantastic, thank you so much for posting them !!

In the video "Bildwerkzeug" you show blueprints of eyeglasses.
I am currently aiming to learn more about eyewear design -
overall measures, radius of glasses, types of hinges, and every
detail a designer needs to know about this topic to be able
to create a production-ready design.

So here is my question if you or anyone in the forum can point
me to professional ressources ! TOM