An article in Ophthalmology confirms what many of us know- glaucoma progresses very differently among different people, regardless of the IOP. Pseudoexfoliation patients fare the worst, but other than that, we cannot tell who will progress quickly and who will go slowly. We have to be careful to be aggressive with the former and go easy on the latter- that requires frequent monitoring, and is part of the “art” of glaucoma treatment. I think many of us can take one look at a disc and know what will happen.