“Monocles with galleries were often the most expensive. The wealthy would have the frames custom-made to fit their eye sockets. A sub-category of the galleried monocle was the “sprung gallery”, where the gallery was replaced by an incomplete circle of flattened, ridged wire supported by three posts. The ends were pulled together, the monocle was placed in the eye orbit, and the ends were released, causing the gallery to spring out and keep the monocle in place.”
Just googling… If you had money, no.
If you didn’t have money, yes.
https://en.m.wikipedia.org/wiki/Monocle
“Monocles with galleries were often the most expensive. The wealthy would have the frames custom-made to fit their eye sockets. A sub-category of the galleried monocle was the “sprung gallery”, where the gallery was replaced by an incomplete circle of flattened, ridged wire supported by three posts. The ends were pulled together, the monocle was placed in the eye orbit, and the ends were released, causing the gallery to spring out and keep the monocle in place.”