SCHWIND eye-tech-solutions GmbH

A method for providing control data for an eye surgical laser is disclosed. A control device ascertains a lenticule geometry of a lenticule to be separated from predetermined visual disorder data of a human or animal eye. The control device ascertains a correction value for compensating for a deformation of the lenticule, which is generated by at least one contact element of the treatment apparatus. The control device ascertains a deformation geometry of the lenticule, wherein a deformation refractive power value is calculated depending on the refractive power value to be corrected and the correction value. A deformation diameter is calculated depending on a lenticule diameter and the correction value. The control device provides control data for controlling the eye surgical laser, which uses the deformation geometry for the separation of the lenticule.

An apparatus and method are disclosed for providing control data for a laser of a treatment apparatus for the correction of a cornea. The method includes determining a look-up table for preset corneal parameters by a corneal deformation model, wherein the cornea can be modeled in deformed and non-deformed states by the corneal deformation model. A value of at least one preset corneal parameter in the non-deformed state of the cornea is varied and an effect of this variation on values of the corneal parameters in the deformed state of the cornea is ascertained for determining the look-up table. The method further includes ascertaining a corneal value to be achieved from predetermined examination data, determining by the look-up table a deformation-corrected corneal value to be achieved for compensating for the deformation of the cornea, and providing control data, which uses the deformation-corrected corneal value for correcting the cornea.

A method for providing control data of an eye surgical laser is disclosed. A control device ascertains a lenticule geometry of the lenticule to be separated from predetermined visual disorder data of a human or animal eye. The lenticule geometry is defined by means of a refractive power value to be corrected and a lenticule diameter. The control device ascertains a correction value for compensating for a deformation of the lenticule, which is generated by at least one contact element of the treatment apparatus. The control device ascertains a deformation geometry of the lenticule, wherein the deformation geometry is defined by means of the refractive power value and a deformation diameter. The deformation diameter is calculated depending on the lenticule diameter and the correction value, and provides control data for controlling the eye surgical laser, which uses the deformation geometry for the separation of the lenticule.

A method is disclosed for providing control data for an eye surgical laser of a treatment apparatus for the removal of tissue from a human or animal cornea. The method includes ascertaining a temperature distribution expected in the cornea per laser pulse, and determining, by using a temperature model of the cornea, a laser pulse sequence of a preset laser pulse distribution for removing the tissue. A respective laser pulse position in the cornea is preset by the laser pulse distribution and sequence. A temperature profile of the cornea is calculated by means of cumulated temperature distributions of the laser pulses in the temperature model and a difference profile to a preset limit temperature profile is determined. An order of the laser pulses is ascertained depending on the difference profile for determining the laser pulse sequence, and providing control data for controlling the laser pulse sequence for removing tissue.

A method is disclosed for controlling an ophthalmological laser of a treatment apparatus for the treatment of a human or animal eye. The method includes controlling the laser by a control device of the treatment apparatus such that the laser emits pulsed laser pulses in a shot sequence in a preset pattern into the eye. The individual laser pulses interact with a tissue of the eye for the treatment of the eye, wherein a space-filling curve is the preset pattern for treating the tissue.

A treatment apparatus, a computer program, and a computer-readable medium for carrying out a method for determining a position of a laser focus of a laser beam of an eye surgical laser of a treatment apparatus by a control device of the treatment apparatus, in which the laser beam of the treatment apparatus is emitted into or onto a human or animal eye and in which at least two Purkinje images of the laser beam on the eye are captured by an optical capturing device of the treatment apparatus, and in which the position of the laser focus in or on the eye is determined by the control device considering the captured Purkinje images and considering an opening angle of the laser beam.

A method is disclosed for controlling an eye surgical laser for the separation of a volume body from a cornea by using a control device such that the laser emits pulsed laser pulses in a shot sequence in a predefined pattern into the cornea. Interfaces of the volume body to be separated are defined by the predefined pattern and the interfaces are created by a plurality of cavitation bubbles generated by photodisruption. The plurality of cavitation bubbles is generated along at least one cavitation bubble path and the control device controls the shot sequence of the laser for generating a preset smoothness value such that a common overlap area of the cavitation bubbles is generated at least between adjacent cavitation bubbles located on the same cavitation bubble path depending on a geometry of the respective cavitation bubble.

The invention relates to a treatment apparatus ( 10 ) and to a method for determining an eye orientation of an eye ( 16 ). The treatment apparatus ( 10 ) includes at least one ophthalmological laser ( 12 ) for irradiating the eye ( 16 ) by laser radiation ( 20 ); a capturing device ( 24 ) with at least one camera ( 26 ), wherein the capturing device ( 24 ) is formed to capture eye recording data by the at least one camera ( 26 ); and a computing device ( 18 ), which is formed to ascertain an eye orientation from the eye recording data, wherein the eye orientation includes a distance (3D), a vertical displacement (1D) and a horizontal displacement (2D) of the eye ( 16 ) in relation to a preset reference point of the ophthalmological laser ( 12 ) as well as a cyclotorsion (6D), a vertical rotation (4D) and a horizontal rotation (5D) of the eye ( 16 ), wherein the computing device ( 18 ) is further formed to generate control data for controlling the treatment apparatus ( 10 ) depending on the ascertained eye orientation.

A method is disclosed for determining a position of a target point of a human or animal eye during a medical treatment of the eye to allow an improved target accuracy for triggering a laser pulse to a respective target point. The method includes capturing a respective picture of the eye at a first point of time and a later second point of time, determining movement information with respect to a movement of the eye and/or of the target point based on the respective pictures and determining prediction data. The prediction data including a prediction for a future position and/or orientation of the target point at a later point of time, based on the movement information, wherein the later point of time is temporally spaced from the second point of time by a period of time, the duration of which is derived from a latency of an image evaluation.

A method for providing control data for an ophthalmological laser of a treatment apparatus for avoiding an opaque bubble layer in a cornea is provided. There is effected determining a treatment area in the cornea by predetermined examination data, wherein first irradiation parameters for providing an optical breakdown are set; determining an initial irradiation area in or adjoining to the treatment area, in which it is begun with an irradiation of the cornea, wherein second irradiation parameters for the optical breakdown are set for the initial irradiation area, by which a reduced power density is generated; wherein a positioning of at least a first laser pulse path is set adjoining to the initial irradiation area for a subsequent irradiation of the treatment area. Finally, providing the control data for the ophthalmological laser, which includes the treatment area and the initial irradiation area with the respective irradiation parameters, is affected.