This book has been conceived as a reference for all those who want to deepen their knowledge of technical details, design concept and interac tion of the individual modules of Zeiss operation microscopes. The sub jects of the book are classified in accordance with our intention. Special emphasis has been placed on practical hints for the user of opera tion microscopes to avoid operating errors. Parameters which are of para mount importance for surgeon and assistant such as PD and diopter set ting are therefore described in detail. The effects of wrong adjustments are indicated. The above...