[History of the development of some ophthalmologic instruments by Carl Zeiss]

Starting with the corneal microscope of 1898, numerous ophthalmological instruments have been developed at Zeiss in cooperation with important eye doctors. Examples are retinal cameras, slitlamps, the photo slitlamp, the keratometer, surgical microscopes and the photocoagulator. As an optical feature, some of these instruments exhibit parallel beam paths making easier the construction of modular systems.