Source:http://linkedlifedata.com/resource/umls/id/C0687426
UMD: Operating light microscopes designed to magnify minute structures (e.g., nerves, vessels) in the performance of delicate ear, nose, and/or throat (ENT) surgical procedures, which require high magnification and adjustable focusing. ENT operating microscopes typically consist of a stereo microscope (standard or modified) and a mobile floor stand or wall or ceiling mount. The microscope is usually held by an adjustable arm attached to the support mechanism. Most operating microscopes are equipped with motorized focusing, adjustable magnification systems (manual, zoom, or both), backup lamps, and inclined tubes that permit the surgeon to see the field from a vertical perspective while keeping his or her head erect. Dual- or multiple-observation capability and the optical integration of still, motion picture, and TV cameras are common features of otorhinolaryngoscopy microscopes.