To be honest, I don't know where I'd rank on an objective severity scale. My floaters often make it difficult to read, and I've got one that can lodge in the wrong place for long enough to make driving feel a little scary. That's maybe not bad enough - given the risks, which I don't know right now - to argue against it. I'm not necessarily questioning the doctor's judgment - he's maybe right! - just mad that he didn't even tell me about this procedure.
Given it makes it hard to read and actually makes driving dangerous it sounds like it's bad enough to warrant treatment. Get a second opinion, mention trouble reading and unable to see properly while driving.
To be honest, I don't know where I'd rank on an objective severity scale. My floaters often make it difficult to read, and I've got one that can lodge in the wrong place for long enough to make driving feel a little scary. That's maybe not bad enough - given the risks, which I don't know right now - to argue against it. I'm not necessarily questioning the doctor's judgment - he's maybe right! - just mad that he didn't even tell me about this procedure.