operating microscope /op″ərā′ting/ [L, operare + Gk, mikros, small, skopein, to look] , a binocular microscope used in delicate surgery, especially surgery of the eye or ear. The standing type of operating microscope has a motorized zoom system operated by a foot pedal that quickly changes the magnification. The operating microscope that attaches to a surgeon’s head has interchangeable lenses for different magnifications. Also called surgical microscope.
