Method for controlling an eye surgical laser with a transition zone at the volume body

A treatment apparatus with at least one surgical laser for separation of a volume body with an anterior interface and with a posterior interface of a human or animal eye and with at least one control device for the laser or lasers, which is designed to execute the following method steps:

• determining a target position of a pupil of the eye relative to a laser beam of the laser in a neutral pose of a beam deflection device of the treatment apparatus depending on patient information;
• determining an optical zone with a treatment center on at least one of the anterior and posterior interfaces relative to an optical axis of the laser beam in the neutral pose of the beam deflection device depending on the patient information;
• determining a transition zone at the volume body as an extension of the posterior and/or anterior interface with the optical zone;
• capturing a current actual position of the pupil using an optical capturing device of the treatment apparatus;
• determining a deviation between the target position of the pupil and the actual position of the pupil;
• decentering the determined optical zone relative to the optical axis of the laser beam in the neutral pose of the beam deflection device, wherein the decentering is based on the determined deviation between the target position of the pupil and the determined actual position of the pupil such that after decentering,
• the treatment center of the optical zone is not axially aligned with the optical axis of the laser beam,
• an edge of the volume body is generated concentrically to the optical axis of the laser beam in the neutral pose of the beam deflection device, and
• the optical zone is generated concentrically to the determined treatment center and within the transition zone;
• and
• focusing the laser beam during or after the step of decentering the determined optical zone,
• wherein the transition zone of the volume body is generated as an off-center crescent relative to the determined treatment center and concentrical to the optical axis of the laser beam in the neutral pose of the beam deflection device and the optical zone of the volume body is generated concentrical to the determined treatment center and off-center relative to the optical axis of the laser beam in the neutral pose of the beam deflection device.

A non-transitory computer-readable medium having instructions stored thereon that, when executed by a processor, cause the processor to control an eye surgical laser of a treatment apparatus for separation of a volume body with an anterior interface and with a posterior interface of an eye, wherein the anterior interface and the posterior interface contact each other at an edge of the volume body, the processor:

• determining a target position of a pupil of the eye relative to a laser beam of the laser in a neutral pose of a beam deflection device of the treatment apparatus depending on patient information;
• determining an optical zone with a treatment center on at least one of the anterior and posterior interfaces relative to an optical axis of the laser beam in the neutral pose of the beam deflection device depending on the patient information;
• determining a transition zone at the volume body as an extension of the posterior and/or anterior interface with the optical zone;
• capturing a current actual position of the pupil using an optical capturing device of the treatment apparatus;
• determining a deviation between the target position of the pupil and the actual position of the pupil;
• decentering the determined optical zone relative to the optical axis of the laser beam in the neutral pose of the beam deflection device, wherein the decentering is based on the determined deviation between the target position of the pupil and the determined actual position of the pupil such that after decentering,
• the treatment center of the optical zone is not axially aligned with the optical axis of the laser beam,
• the edge of the volume body is generated concentrically to the optical axis of the laser beam in the neutral pose of the beam deflection device, and
• the optical zone is generated concentrically to the determined treatment center and within the transition zone;
• and
• focusing the laser beam during or after the step of decentering the determined optical zone,
• wherein the transition zone of the volume body is generated as an off-center crescent relative to the determined treatment center and concentrical to the optical axis of the laser beam in the neutral pose of the beam deflection device and the optical zone of the volume body is generated concentrical to the determined treatment center and off-center relative to the optical axis of the laser beam in the neutral pose of the beam deflection device.