Abstract: Method for controlling an eye surgical laser of a treatment device for the separation of a volume body with a predefined posterior interface and a predefined anterior interface from a human or animal cornea. The method includes controlling the laser by means of a control device of the treatment device such that it emits pulsed laser pulses in a shot sequence in a predefined pattern into the cornea. The interfaces of the volume body are defined by the predefined pattern and are generated by means of an interaction of the individual laser pulses with the cornea by the generation of a plurality of cavitation bubbles by photodisruption along at least one cavitation bubble path. At least a partial area of an outer cavitation bubble path of the volume body is generated with a higher cavitation bubble density than an inner cavitation bubble path.

Abstract: A method for controlling an eye surgical laser is disclosed for the separation of a volume body. The method includes determining a target position of a pupil relative to a laser beam and determining an optical zone with a treatment center on interfaces relative to an optical axis of the laser beam, determining a transition zone at the volume body as an extension of the interface, capturing a current actual position of the pupil, determining a deviation between the target position and the actual position, and decentering the determined optical zone relative to the optical axis depending on the determined deviation such that the edge of the volume body is generated concentrically to the optical axis and the optical zone is generated concentrically to the determined treatment center and within the transition zone. Further disclosed are a treatment apparatus, a computer program and computer-readable medium capable of performing the method.

Abstract: A method is disclosed for controlling an eye surgical laser for the separation of a volume body with predefined interfaces from a human or animal cornea. The method includes controlling the laser by means of a control device such that it emits pulsed laser pulses in a predefined pattern into the cornea, wherein the interfaces of the volume body to be separated are defined by the predefined pattern and a surface of the cornea and the interfaces located in the cornea are generated by photodisruption. A treatment device is also disclosed that includes at least one eye surgical laser for the separation of a predefined corneal volume with predefined interfaces of a human or animal eye by photodisruption, and at least one control device for the laser or lasers, which is formed to execute the steps of the method.

Abstract: A patient interface system for positioning a patient's eye opposite a laser device for laser surgery is disclosed, including a patient interface for coupling to the patient's eye and a patient interface holder for arranging the patient interface on the laser device. The patient interface holder includes a holder device with an engaging device for reversibly coupling the patient interface to the patient interface holder, and to position the patient interface relative to the patient interface holder with a second positioning device. The engaging device has a spring-loaded engaging body that cooperates with an associated engaging surface of the second positioning device of the patient interface in the coupled state of the patient interface. A method for coupling a patient interface with a patient interface holder of a patient interface system, as well as a patient interface and a patient interface holder for a patient interface system are also disclosed.

Abstract: A method is disclosed for determining a current position of an eye of a patient relative to an optical axis of a laser beam of a treatment apparatus. The method includes presetting a criterion characterizing the eye, determining a first target position of the eye relative to the optical axis, positioning a patient interface in a preset area in front of the optical axis, illuminating the eye during an approaching procedure of the patient interface to the eye, capturing a Purkinje image, which is associated with a cornea of the eye, by means of an optical capturing device during the approaching procedure, comparing the captured Purkinje image to the optical axis and determining the current position of the eye depending thereon, comparing the current position to the target position and with a deviation, outputting a control signal to a control device of the treatment apparatus.

Abstract: A method for providing control data for an eye surgical laser of a treatment apparatus for removing tissue is disclosed. The method includes utilizing a control device for determining a corneal geometry and an ocular wavefront of a human or animal eye from predetermined examination data. A corneal wavefront is then determined from the corneal geometry using a physical model, and an internal wavefront is calculated from a difference between the ocular wavefront and the corneal wavefront. A wavefront to be achieved is calculated from a difference of a preset target wavefront and the calculated internal wavefront. A target corneal geometry is determined from the wavefront to be achieved by the physical model, and a tissue geometry to be removed is calculated from a difference of the corneal geometry and the target corneal geometry, and control data for controlling the eye surgical laser is provided.

Abstract: A patient interface system for positioning a patient's eye relative to a laser device for laser surgery is disclosed that includes a patient interface for coupling to the patient's eye, and a patient interface holder for arranging the patient interface on the laser device. The patient interface holder has a suction duct for connecting to a suction device, and the patient interface has a fluid-conducting device that couples to the patient interface holder, and when in the coupled state, together form a fluid path which fluidically couples the suction duct to the patient interface in order to hold a first positioning device of the patient interface against the patient's eye by a relative negative pressure generated by the suction device. A method is disclosed for coupling a patient interface to a patient interface holder, and a patient interface. A patient interface holder is also disclosed.

Abstract: A method is disclosed for providing control data for an eye surgical laser of a treatment apparatus for the removal of a tissue. The method includes using a control device for determining a wavefront of a cornea and Zernike polynomials from the wavefront and calculating a respective tissue geometry for each Zernike polynomial. A combination of Zernike polynomials describes a tissue removal geometry. The control device ascertains a subgroup of the Zernike polynomials by an optimization calculation, which uses a preset condition to select Zernike polynomials. The condition is preset by a maximized target corneal geometry and a target imaging correction to be achieved. The target corneal geometry is a difference between a corneal geometry and the tissue removal geometry. An optimized tissue removal geometry is found using the subgroup and control data for controlling the eye surgical laser, which uses the optimized tissue removal geometry for separating the tissue.

Abstract: A patient interface system is disclosed for positioning a patient's eye opposite a laser device for laser surgery. The system including a patient interface for coupling to the patient's eye and a patient interface holder for arranging the patient interface on the laser device. The patient interface holder includes a connection device for coupling a camera system. The patient interface holder and the patient interface have corresponding channels that delimit an optical path between the connection device and the patient interface. The channel of the patient interface is arranged such that is runs at least partially on an outer circumference of a suction cup part of the patient interface. Also disclosed are a camera system, a method for coupling a patient interface with a patient interface holder, as well as a patient interface and a patient interface holder, for a patient interface system.

Abstract: A method of controlling an eye surgical laser is disclosed for the separation of a volume body with predefined posterior and anterior interfaces from a human/animal cornea. The method including controlling the laser with a control device, the laser being configured to emit pulsed laser pulses in a predefined pattern into the cornea. The posterior and anterior interfaces of the volume body are defined by the predefined pattern and are generated by an interaction of the individual laser pulses with the cornea through photodisruption. The control device controls the laser beam such that both interfaces are generated via a continuous, uninterrupted sequence of laser pulses. A treatment device is disclosed with at least one eye surgical laser for the separation of a predefined corneal volume with predefined interfaces of a human/animal eye by photodisruption and with at least one control device for the laser(s).