초록 ▼

A computer-aided system include a data storage (18) with eye data (181), which defines a three-dimensional model of the eye, and a reference generator (113) for defining and storing a geometric reference in relation to the three-dimensional model of the eye. The system additionally includes a cut su

A computer-aided system include a data storage (18) with eye data (181), which defines a three-dimensional model of the eye, and a reference generator (113) for defining and storing a geometric reference in relation to the three-dimensional model of the eye. The system additionally includes a cut surface editor for defining and positioning cut surfaces in the three-dimensional model of the eye based on user instructions. Finally, the system includes a cut pattern generator (117) for, based on the positioned cut surfaces, generating and storing three-dimensional cut patterns for defining tissue cuts to be executed in a human eye by means of femtosecond laser pulses. The generation of a three-dimensional cut pattern permits the user to define tissue cuts made possible by femtosecond laser pulses in a targeted and efficient fashion in the three-dimensional model of the eye without having to undertake manipulations directly on the eye for this purpose.

대표청구항 ▼

1. A computer-aided system for generating a three-dimensional cut pattern which defines one or more tissue cuts to be executed in a human eye by means of femtosecond laser pulses, comprising: a data storage with eye data which defines a three-dimensional model of the eye;a visualization module confi

1. A computer-aided system for generating a three-dimensional cut pattern which defines one or more tissue cuts to be executed in a human eye by means of femtosecond laser pulses, comprising: a data storage with eye data which defines a three-dimensional model of the eye;a visualization module configured to generate and display the three dimensional model of the eye in a user interface;a reference generator which is configured to define and to store at least one geometric reference in relation to the three-dimensional model of the eye; the visualization module further configured to display the at least one geometric reference in the three-dimensional model of the eye in the user interface;a cut surface editor which is configured to define via the user interface, based on user instructions, a cut surface and to position the cut surface in the three-dimensional model of the eye displayed in the user interface in relation to the at least one geometric reference, based on user instructions for defining orientation and a three-dimensional position of the cut surface in the three-dimensional model of the eye, the three-dimensional position of the cut surface being defined by the user using positioning elements of the computer to displace the cut surface in the three-dimensional model of the eye, and to repeat defining and positioning of cut surfaces based on user instructions, until the user indicates via the user interface that defining and positioning of a cut is complete and a plurality of cut surfaces have been defined and positioned by the user via the user interface in the three-dimensional model of the eye; anda cut pattern generator which is configured to generate the three-dimensional cut pattern for defining tissue cuts based on the plurality of cut surfaces defined and positioned by the user via the user interface in the three-dimensional model of the eye, and to store for the three-dimensional cut pattern cut pattern data for controlling an ophthalmological laser device; anda sequence generator which is configured to determine an execution sequence for the plurality of cut surfaces defined and positioned by the user via the user interface in the three-dimensional model of the eye, whereby a cut surface which, according to the execution sequence, is to be generated earlier, by a plurality of femtosecond laser pulses, is prevented from covering or shadowing focused radiation of the femtosecond laser pulses for generating a cut surface which, according to the execution sequence, is to be generated later, and wherein the sequence generator determines the covering or shadowing on the basis of a beam cone defined by focused projection of the femtosecond laser pulses, by checking whether the beam cone for generating a cut surface which, according to the execution sequence, is to be generated later, is interrupted by a cut surface which, according to the execution sequence, is to be generated earlier. 2. The system of claim 1, wherein the cut surface editor is configured to define the at least one cut surface on the basis of a user-defined cutting line and a user-defined cutting line trajectory. 3. The system of claim 1, wherein the cut surface editor is configured to define the at least one cut surface on the basis of at least one surface element, which can be selected from a list of a plurality of different surface elements on the basis of user instructions. 4. The system of claim 1, further comprising an applicator selector which is configured to determine, based on user instructions, an application element which should be applied to the eye when executing the tissue cuts. 5. The system of claim 1, wherein the sequence generator is configured to determine the execution sequence for the cut surfaces such that an expected thermal stress on the eye does not exceed a defined threshold. 6. The system of claim 1, further comprising a mask selector which is configured to determine, based on user instructions, a projection mask to be positioned in front of the eye when executing the tissue cuts, and to check, based on the determined projection mask and a beam cone defined by focused radiation of the femtosecond laser pulses, whether the cut surfaces of the tissue cuts defined in the three-dimensional cut pattern can be generated without shadowing by the projection mask. 7. The system of claim 1, wherein the visualization module is configured to show on a display, based on the eye data, a visualization of the eye and a beam cone, defined by focused radiation of the femtosecond laser pulses; and a cut recorder which is configured to generate, based on user instructions, a virtual tissue cut in the visualized eye by moving the beam cone, and to store the virtual tissue cut as a three-dimensional cut pattern. 8. The system of claim 1, further comprising a cut simulator which is configured to simulate, based on the eye data and the stored three-dimensional cut pattern, execution of the tissue cuts defined by the three-dimensional cut pattern, and to visualize it on a display; and a cut pattern editor which is configured to adapt, based on user instructions, the stored three-dimensional cut pattern using at least one operation from the following list: repositioning a cut surface, reorienting a cut surface, changing a cut direction of a cut surface, deleting a cut surface, deleting a cut surface component, changing a cut surface, adding a cut surface, duplicating a cut surface, changing a geometric reference, changing an execution sequence for the cut surfaces, changing an application element to be attached to the eye when executing the tissue cuts, changing a projection mask to be positioned in front of the eye when executing the tissue cuts and changing a beam cone defined by focused radiation of the femtosecond laser pulses. 9. The system of claim 1, wherein the cut pattern generator is configured to define tissue cuts in the three-dimensional cut pattern by one or more cut surfaces positioned in relation to a geometric reference, wherein a cut surface is in each case defined by at least one parameter from the following list: cutting line, cutting line trajectory, direction of cut, surface element class, surface element dimensions, surface element curvature and surface element orientation, and wherein an execution sequence is assigned to the cut surfaces. 10. The system of claim 1, wherein the cut pattern generator is configured to define the cut surfaces in the three-dimensional cut pattern in the form of macroinstructions. 11. The system of claim 1, wherein the cut surface editor is configured to adapt, based on user instructions, the at least one cut surface using at least one operation from the following list: scaling the size of the cut surface, delimiting the cut surface along one or more boundary lines, changing a curvature of the cut surface, changing an orientation of the cut surface, changing a cut direction of the cut surface and changing a cut class of the cut surface, wherein the cut class is defined by at least one element of the following list of cut classes: cuts with a cut surface defined as a second order surface, cuts with a cut surface defined as a spline surface, cuts with a cut surface defined by a cutting line and cut direction and cuts with a cut surface defined by a stored three-dimensional cut pattern. 12. A computer-implemented method of generating a three-dimensional cut pattern which defines one or more tissue cuts to be executed in a human eye by means of femtosecond laser pulses, the method comprising: storing in a computer eye data which defines a three-dimensional model of the eye;displaying the three-dimensional model of the eye in a user interface;defining and storing in the computer at least one geometric reference in relation to the three-dimensional model of the eye;displaying the at least one geometric reference in the three-dimensional model of the eye in the user interface;defining in the computer, based on user instructions received via the user interface, a plurality of cut surfaces and positioning the plurality of cut surfaces in the three-dimensional model of the eye displayed in the user interface in relation to the at least one geometric reference based on user instructions for defining orientation and a three-dimensional position of the cut surface in the three-dimensional model of the eye, the three-dimensional position of the cut surface being defined by the user using positioning elements of the computer to displace the cut surface in the three-dimensional model of the eye;repeating the defining and the positioning of cut surfaces based on user instructions, until the user indicates via the user interface that defining and positioning of a cut is complete and a plurality of cut surfaces have been defined and positioned by the user via the user interface in the three-dimensional model of the eye;generating in the computer the three-dimensional cut pattern for defining tissue cuts based on the plurality of cut surfaces determined and positioned by the user via the user interface in the three-dimensional model of the eye;storing three dimensional cut pattern data for controlling an ophthalmological laser device; anddetermining in the computer, automatically or based on user instructions, an execution sequence for the cut surfaces of the tissue cuts defined in the three-dimensional cut pattern, wherein a cut surface which, according to the execution sequence, is to be generated earlier is prevented from covering or shadowing focused radiation of the femtosecond laser pulses for generating a cut surface which, according to the execution sequence, is to be generated later, andwherein the covering or shadowing is determined on the basis of a beam cone defined by focused projection of the femtosecond laser pulses, by checking whether the beam cone for generating a cut surface which, according to the execution sequence, is to be generated later, is interrupted by a cut surface which, according to the execution sequence, is to be generated earlier. 13. The method of claim 12, wherein the at least one cut surface is defined in the computer on the basis of a user-defined cutting line and a user-defined cutting line trajectory. 14. The method of claim 12, wherein the at least one cut surface is defined in the computer on the basis of at least one surface element, which can be selected from a list of a plurality of different surface elements on the basis of user instructions. 15. The method of claim 12, further comprising determining in the computer, based on user instructions, an application element which should be applied to the eye when executing the tissue cuts. 16. A computer-implemented method of generating a three-dimensional cut pattern which defines one or more tissue cuts to be executed in a human eye by means of femtosecond laser pulses, the method comprising: storing in a computer eye data which defines a three-dimensional model of the eye;determining in the computer, based on the eye data and an application element which is to be applied onto the eye when executing the tissue cuts, a three-dimensional model of the eye, representing the eye in an applied application element state;displaying the three-dimensional model of the eye in a user interface;defining and storing in the computer at least one geometric reference in relation to the three-dimensional model of the eye;displaying the at least one geometric reference in the three-dimensional model of the eye in the user interface;defining in the computer, based on user instructions received via the user interface, a plurality of cut surfaces and positioning the plurality of cut surfaces in the three-dimensional model of the eye displayed in the user interface in relation to the at least one geometric reference based on user instructions for defining orientation and a three-dimensional position of the cut surface in the three-dimensional model of the eye, the three-dimensional position of the cut surface being defined by the user using positioning elements of the computer to displace the cut surface in the three-dimensional model of the eye;repeating the defining and the positioning of cut surfaces based on user instructions, until the user indicates via the user interface that defining and positioning of a cut is complete and a plurality of cut surfaces have been defined and positioned by the user via the user interface in the three-dimensional model of the eye;generating in the computer the three-dimensional cut pattern for defining tissue cuts based on the plurality of cut surfaces determined and positioned by the user via the user interface in the three-dimensional model of the eye;determining in the computer, automatically or based on user instructions, an execution sequence for the cut surfaces of the tissue cuts defined in the three-dimensional cut pattern, wherein a cut surface which, according to the execution sequence, is to be generated earlier is prevented from covering or shadowing focused radiation of the femtosecond laser pulses for generating a cut surface which, according to the execution sequence, is to be generated later; andstoring for the three-dimensional cut pattern data for controlling an ophthalmological laser device, andwherein the covering or shadowing is determined on the basis of a beam cone defined by focused projection of the femtosecond laser pulses, by checking whether the beam cone for generating a cut surface which, according to the execution sequence, is to be generated later, is interrupted by a cut surface which, according to the execution sequence, is to be generated earlier.