This is an interesting pair of vintage cat eyeglasses!  Rimless!  Maybe I’ve been living in a cave but I’ve never seen this style before.  I would estimate these vintage eyeglasses to date to the 1950s.

They are bifocal prescription lenses.  The upper portion is similar to a 150 strength reading glasses, but I have no idea what the bottom portion is.  Maybe an optical shop could cut new lenses in the same shape?  The nose piece is marked 10k gold filled and there is some wear to the plating on the inside of the nose piece.  All visible parts are excellent.