Two decades ago, cardiology underwent a revolution when interventionalists began using smaller tools to repair heart damage that once required an open incision. Interventional cardiology didn’t emerge smoothly into mainstream health care as cardiologists fought the push, but the impact on costs and efficacy of treating damaged hearts or vessels can’t be refuted.
Ophthalmology has seen a similar change, at least in the normally sleepy field of glaucoma, which is actually a group...