Modified ceiling-mounted zoom operating microscope.
D001331:Automation; D006804:Ergonomics; D005336:Fiber Optic Technology; D006801:Humans; D008853:Microscopy / Q000295:instrumentation*; D008866:Microsurgery / Q000295:instrumentation*; D013508:Ophthalmologic Surgical Procedures; D011187:Posture; D013679:Technology, Radiologic / Q000295:instrumentation