Treatment apparatus for surgical correction of defective eyesight, method of generating control data therefore, and method for surgical correction of defective eyesight

A planning device for determining control data for a treatment apparatus for surgical correction of defective eyesight in an eye of a patient, said planning device generating the control data for the treatment apparatus comprising a laser device, which separates corneal tissue by irradiation of pulsed laser radiation, said laser radiation being focused on target points arranged in a pattern within the cornea,

• wherein the planning device
• comprises an interface for supplying measurement data on parameters of the eye, and defective-eyesight data on the eyesight defect to be corrected in the eye,
• defines a volume using supplied measurement and defective-eyesight data, which volume is located within the cornea and whose removal from the cornea causes the desired correction of defective eyesight,
• determines a boundary surface, which confines the defined volume within the cornea, and
• generates for said boundary surface a control dataset to control the laser device, which control dataset defines a three-dimensional pattern of the target points in the cornea, which are located in the boundary surface and are arranged such that the boundary surface, after irradiation of the pulsed laser radiation according to the control dataset, is provided as a cut surface which isolates the defined volume in the cornea and, thus, makes it removable,
• wherein the planning device generates the control dataset such that the control data define the target points as points of a path along which the focus of the laser radiation is to be shifted during the intended operation of the treatment apparatus, said target points of the control data being spaced apart on the path in such a manner that, due to the focus shifting speed and the pulse frequency of the laser device during operation of the treatment apparatus, pulses of the pulsed laser radiation are also emitted onto points in the cornea which are located on the path between the target points.