The microscopes of zeiss.
D005860:Germany, West; D049673:History, 20th Century; D006801:Humans; D008722:Methods; D008846:Micromanipulation / Q000295:instrumentation; D008853:Microscopy / Q000295:instrumentation*; D013508:Ophthalmologic Surgical Procedures; D009885:Ophthalmology / Q000295:instrumentation; D013523:Surgical Equipment / Q000266:history