Cohen and his colleagues at MEEI devised a classification system for the degree of use of the endoscope in otologic<unk> . Class 0: Microscopic only case Class 1: Inspection with endoscope Class 2: Mixed dissection with endoscope and microscope Class 3:<unk>  only case
Endoscopic ear surgery
Middle ear implant
Ocular prosthesis
Tinnitus retraining therapy
Eyelid revision
GreenLight Laser Therapy
Functional endoscopic sinus surgery
Low-level laser therapy