It's not THAT important, but like-- keep in mind, monocles work like glasses, but for one eye. So if a character loses a monocle, this should affect their depth perception! It's not necessary to mention if it's unimportant, but it might make for an interesting inconvenience. Which is why I'm mentioning it.

Monocles are my favorite thing, so I felt like I had no choice but to point it out. Also, have a nice day! Remember to eat lunch and take medication and all that.