# US 2014/0155875 A1 · After-treatment of refraction correction by ophthalmic surgery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155875 A1 - Document ID: US20140155875A1 - Status: Published application - Kind: A1 - Application number: 14/234,128 - Filed: 2012-07-20 - Published: 2014-06-05 - Earliest claimed: 2011-07-22 - Assignees: Carl Zeiss Meditec AG - Inventors: Michael Bergt; Carsten Lang - Web page: https://patentgrep.com/patent/US20140155875A1 ## CPC - A61F 9/00836: {Flap cutting} - A61F 9/00827: {Refractive correction, e.g. lenticle} - A61F 2009/00872: {Cornea} - A61F 2009/00897: {Scanning mechanisms or algorithms} - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) ## Abstract A planning system for generating control data, a treatment device for ophthalmic surgery to correct refraction, and a method for generating control data for such a treatment device, by which method it is easily possible to continue an interrupted treatment or correct a previous treatment. To this end, the planning system has calculating means for defining a corneal incision surface, wherein the calculating means determine the new corneal incision surface such that the existing corneal incision surface is incised by at least a part of the new corneal incision surface at an angle of between 60° and 120°. ## Claims ### Claim 1 A planning device for generating control data for a treatment apparatus for ophthalmic surgery, which cuts at least one incision surface in a cornea, using a laser device, wherein the planning device includes a calculation device for establishing a new cornea incision surface, wherein the calculation device establishes the new cornea incision surface based on data of a previously-introduced cornea incision surface and generates a control data set for controlling the laser device for the new cornea incision surface, wherein the calculation device determines the new cornea incision surface in such a manner that the previously-introduced cornea incision surface is intersected by at least a part of the new cornea incision surface at an angle between 60° and 120°. ### Claim 2 (depends on 1) The device according to claim 1, wherein the calculation device establishes the new cornea incision surface as a continuation of the previously-introduced cornea incisions surface, wherein an overlap region is provided between the previously-introduced cornea incision surface and the new cornea incision surface. ### Claim 3 (depends on 1) The device according to claim 1, wherein the information concerning the previously-introduced cornea incisions surface comprises data generated during a previous operation or directly subsequent to the previously operation, and which enables reproduction of a location and shape of the incisions. ### Claim 4 (depends on 1) A treatment apparatus for ophthalmic surgery, comprising a laser device that cuts at least one incision surface in the cornea by means of laser radiation in accordance with control data, and the planning device for generating the control data according to claim 1. ### Claim 5 (depends on 4) The apparatus according to claim 4 further comprising a device for recording progression of a production of the new cornea incision surface. ### Claim 6 (depends on 4) The apparatus according to claim 4, wherein the laser device emits focused, pulsed laser radiation into the cornea and produces an incision by adjusting a focus position along an incision surface. ### Claim 7 A method for generating control data for a treatment apparatus for ophthalmic surgery which cuts at least one incision surface in the cornea using a laser device, the method comprising: making available cornea data that contain information about incisions that have already been introduced, establishing a new cornea incision surface, and generating a control data set for the new cornea incision surface for controlling the laser device, wherein the new cornea incision surface is determined in such a manner that an existing cornea incision surface is intersected by at least a part of the new cornea incision surface at an angle between 60° and 120°, preferably 80° to 100°. ### Claim 8 A method for ophthalmic surgery, wherein at least one incision surface in a cornea is cut with a laser device (4), using a treatment apparatus, wherein the method comprises: making available cornea data that contain information about an existing incision surface that has already been produced, establishing a new cornea incision surface based on the cornea data and generating a control data set for the new cornea incision surface, transmitting the control data to the treatment apparatus, and producing the new cornea incision surfaces by controlling the laser device with the control data set, wherein the new cornea-incision surface is determined in such manner that the existing cornea incision surface is intersected by at least a part of the new cornea incision surface at an angle between 60° and 120°. ### Claim 9 (depends on 8) The method according to claim 8, wherein the cornea incision surface continues incisions previously made, wherein an overlap region is provided between the existing incision surface and the cornea incision surface. ### Claim 10 (depends on 9) The method according to claim 9, wherein a the progression of production of the new cornea incision surface is recorded. ### Claim 11 (depends on 8) A computer program product having program code that performs the method according to claim 8 when it is run on a computer. ### Claim 12 (depends on 11) A tangible computer readable data medium storing a computer program product, according to claim 11. ### Claim 13 (depends on 1) The planning device of claim 1, wherein the existing cornea incision surface is intersected by at least a part of the new cornea incision surface at an angle between 80° and 100°. ### Claim 14 (depends on 13) The planning device of claim 13, wherein the existing cornea incision surface is intersected by at least a part of the new cornea incision surface at an angle of approximately 90°. ### Claim 15 (depends on 1) The planning device of claim 1, wherein the calculation device comprises a computer. ### Claim 16 (depends on 7) The method of claim 7, wherein the existing cornea incision surface is intersected by at least a part of the new cornea incision surface at an angle between 80° and 100°. ### Claim 17 (depends on 16) The method of claim 16, wherein the existing cornea incision surface is intersected by at least a part of the new cornea incision surface at an angle of approximately 90°. ### Claim 17 (depends on 8) The method of claim 8, wherein the existing cornea incision surface is intersected by at least a part of the new cornea incision surface at an angle between 80° and 100°. ### Claim 18 (depends on 8) The method of claim 8, wherein the existing cornea incision surface is intersected by at least a part of the new cornea incision surface at an angle of approximately 90°.