A device for assisting in the preparation of an operation on the human eye forthepurpose of generating a corneal flap by means of a microkeratome systemincludes: aninput interface arrangement that permits at least the input of data relatingto a set valueof at least one flap parameter and also to at least one patient-relatedparameter； acomputer to access a stored data collection of several surgical data records,each ofwhich includes a post-operative actual value of at least one flap parameter, avalue for atleast one patient-related parameter and configuration data of themicrokeratome system,the computer having been set up to ascertain, on the basis of the datacollection in amanner depending on the input data, configuration information that representsaproposed configuration of the microkeratome system； and an output interfacearrangement for outputting the configuration information. The microkeratomesystemreceives the configuration information confirmed by a user from the device.
