Optical magnification has expanded the horizons of endodontics. The improvement of visual acuity through optical magnification is part of modern dental practices. The most important benefits when using an operating microscope are increased precision, better vision of tiny details and imperfections, more precise execution of all dental techniques, better treatments for patients, less iatrogenic occurrences, less removal of sound tooth structure, better communication between clinicians and patients and laboratory technicians, and improved documentation of each treatment case.