Face Shield Glasses Clips

To my knowledge, this is an innovative design.

I am not, however, claiming that there isn't significant room for improvement.

Backstory: I was watching a lady who was working and wearing a face shield. It was a style I hadn't noticed before, where a face shield was part of a glasses frame that didn't have lenses. She also was wearing a pair of glasses, and had the "shield glasses" sitting on top/above her prescription glasses.

I thought, "Well that's crazy. It makes sense if you don't need glasses to have the empty frame kind, but if you DO wear glasses why not just make the shield attach to those?"

So I started thinking about how to do that, and ran through a bunch of iterations before I found something that worked well, and then five stages of refinement from there.

My requirements:
- it had to be universal, or at least reasonably simple to size for various frames.
- it needed to be simple (enough) to install/remove
- It needed to print quickly and without suppor