I've noticed that prescription eye glasses frames are often made from metal that is quite rigid. It's surprisingly difficult to bend the metal, despite how thin it is. And if it does bend, it doesn't seem to weaken much when bent back and forth.
Is there a certain kind of metal that is typically used for making prescription glasses frames?
Examples that come to mind:
- High-grade aluminum or aluminum alloy
- Stainless steel (can it be painted?)