SCHWIND eye-tech-solutions GmbH

The invention relates to a treatment apparatus and a method for providing control data for an ophthalmological laser ( 12 ) of a treatment apparatus ( 10 ) for generating a laser-induced refractive index change, comprising, as steps, determining (S 10 ) irradiation positions ( 16 ) for irradiation by laser pulses for the laser-induced refractive index change, wherein first and second laser pulse lengths ( 28, 30 ) are provided for the irradiation of the irradiation positions, wherein the first laser pulse length ( 28 ) has a shorter laser pulse length than the second laser pulse length ( 30 ); setting (S12) preset irradiation positions ( 24 ) to the second laser pulse length ( 30 ); and providing (S14) the control data for controlling the ophthalmological laser ( 12 ), which includes the adjusted second laser pulse length ( 30 ) for the preset irradiation positions ( 24 ).

The invention relates to a treatment apparatus ( 10 ) and a method for providing control data for an ophthalmological laser ( 12 ) of a treatment apparatus ( 10 ) for the laser-induced refractive index change. As steps, the method includes determining (S 10 ) treatment positions ( 16 ) in a cornea ( 14 ) of an eye, which are intended for the change by the laser-induced refractive index change; determining (S 12 ) an orientation of collagen fibers ( 30 ) to be expected in the cornea ( 14 ) in the respective treatment positions ( 16 ) based on collagen fiber data of the cornea ( 14 ); setting (S 14 ) a polarization property ( 24, 26 ) of a laser beam ( 20 ) of the laser ( 12 ) based on the orientation of the collagen fibers ( 30 ) to be expected for a respective treatment position ( 30 ); and providing (S 16 ) the control data, which includes the set polarization property ( 24, 26 ) for the respective treatment position ( 16 ).

The invention relates to a method for providing control data for an ophthalmological laser ( 12 ) of a treatment apparatus ( 10 ) as well as to an surgical procedure, wherein the method comprises the following steps performed by at least one control device ( 18 ): Presetting a course of a Bowman's membrane ( 34 ) of a cornea of an eye ( 14 ) of a patient depending on at least one patient information; determining an incision course at least for an anterior interface ( 20 ) of a volume body ( 16 ) to be removed in a stroma ( 36 ) of the eye ( 14 ) depending on the course of the Bowman's membrane ( 34 ) such that a preset geometric relation to the Bowman's membrane ( 34 ) is formed by the anterior interface ( 20 ); and generating the control data for controlling the laser ( 12 ) by means of the control device ( 18 ) such that it emits pulsed laser pulses in a shot sequence onto the eye. Further, the invention relates to a control device ( 18 ), to a treatment apparatus ( 10 ), to a computer program as well as to a computer-readable medium.

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.

The invention relates to devices and methods for providing control data for an ophthalmological laser ( 12 ) of a treatment apparatus ( 10 ) for reducing geometric irregularities ( 14 ) of an eye. As steps, the method includes determining geometric irregularities ( 14 ) of the eye from predetermined examination data, which generate higher order aberrations; determining a treatment profile with a preset optical zone depending on the geometric irregularities ( 14 ), wherein an optimization function, which includes a term for reducing the higher order aberrations and an opposing tissue removal term, is optimized up to an optimization range for determining the treatment profile; and providing the control data, which includes at least the treatment profile.

A method is disclosed for controlling an eye surgical laser for removing a volume body from a cornea with an anterior interface of the cornea and a posterior interface of the cornea. The method includes presetting the posterior actual interface, determining a first imaging point of the cornea, determining an anterior target interface depending on the posterior actual interface and the first imaging point based on a mathematical model, determining a shape of the volume body to be generated by presetting the determined anterior target interface, and generating control data for generating the volume body such that the anterior actual interface corresponds to the determined anterior target interface after removing the volume body from the cornea. Further, the invention relates to a treatment apparatus, to a computer program product as well as to a computer-readable medium.

A method for providing control data of an eye surgical laser of a treatment apparatus is disclosed for a treatment on a human or animal eye. The method optimizes a target conflict between low stress for a patient and efficacy of a laser. The method includes, as performed by a control device, determining a patient-specific parameter set, which relates to at least one physiological characteristic of the eye, determining at least one physical parameter for the eye surgical laser depending on the patient-specific parameter set, wherein the physical parameter relates to a physical characteristic of a laser beam of the laser, and providing control data for controlling the eye surgical laser, which includes the physical parameter.

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.