A system for producing assistance information for a laser-assisted cataract operation on an eye, including: a laser cataract device with a laser beam source, a laser beam scanning device, a control device for predefining a cutting geometry of the cuts, an imaging device and an output interface. The control device determines the position of reference structures of the eye and produces a position data set containing cutting geometry in relation to the structures, and outputs the position data record at the interface. The system also includes an operation microscope having a microscope, a display device, an input interface for receiving the data set, and a control unit that receives the data set and determines the position of the structures with respect to image data, and inputs the cutting geometry into the image displayed on the display device appropriately in terms of position and size with respect to the reference structures.
