title: [Optics of surgical microscopes].
abstract: Operating microscopes are binocular telescopic magnifying glasses which have been extended by afocal systems. The important feature of these instruments is that the magnification can be changed rapidly. The way the pancreatic magnification changer works can be described very simply as a synthesis of two Galilean telescopes. Operating microscopes can also be used as binocular ophthalmoscopes.
mesh_terms: D005128:Eye Diseases / Q000601:surgery*; D006801:Humans; D007909:Lenses; D008853:Microscopy / Q000295:instrumentation*; D008866:Microsurgery / Q000295:instrumentation*; D055095:Optics and Photonics
vernacular_title: Zur Optik der Operationsmikroskope.