An idea I had for furries that wanted to wear glasses but didn't want to have large hanging temples coming down, or a band going around the back of their head. So these are a subdermal design that allow magnets to be fitted to the sides of the creatures temple and then with a nose grip that allows to sit on their muzzles/beaks. With tweaking I could see this being a real thing for humans too.
The glasses have to sets of rings to hold the pieces together, so that you can remove the glasses and keep the frames till they are correctly lensed (is that the right term? ) Then you just pop it all back together and you can even customise the design to have different sides and glasses rims.