According to an exemplary embodiment a device (12) for assisting in the preparation of an operation on the human eye (14) for the purpose of generating a corneal flap by means of a microkeratome system (10) includes: an input interface arrangement (50) that permits at least the input of data relating to a set value of at least one flap parameter and also to at least one patient related parameter a computer (46) that has been set up to access a stored data collection (44) of several surgical data records each of which includes a post operative actual value of at least one flap parameter a value for at least one patient related parameter and configuration data of the microkeratome system the computer (46) having been set up to ascertain on the basis of the data collection (44) in a manner depending on the input data configuration information that represents a proposed configuration of the microkeratome system (10) an output interface arrangement (48) for outputting the configuration information.
