US 12,220,353 B2
Method for controlling an eye surgical laser and treatment device
Samuel Arba-Mosquera, Aschaffenburg (DE)
Assigned to SCHWIND EYE-TECH-SOLUTIONS GMBH, Kleinostheim (DE)
Filed by SCHWIND EYE-TECH-SOLUTIONS GMBH, Kleinostheim (DE)
Filed on Aug. 17, 2020, as Appl. No. 16/995,371.
Claims priority of application No. 10 2019 122 166.8 (DE), filed on Aug. 19, 2019.
Prior Publication US 2021/0052424 A1, Feb. 25, 2021
Int. Cl. A61F 9/008 (2006.01); A61B 17/00 (2006.01)
CPC A61F 9/00825 (2013.01) [A61B 2017/00154 (2013.01); A61F 2009/00844 (2013.01); A61F 2009/00872 (2013.01); A61F 2009/00897 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for controlling an eye surgical laser for separation of a volume body with a predefined posterior interface and a predefined anterior interface from a human or animal cornea, comprising:
controlling the laser using a control device such that the laser emits pulsed laser pulses in a shot sequence in a predefined pattern into the cornea,
wherein the predefined posterior and anterior interfaces of the volume body to be separated are defined by the predefined pattern, and the predefined posterior and anterior interfaces are generated by an interaction of the pulsed laser pulses with the cornea that occurs due to a plurality of cavitation bubbles being generated by photodisruption,
wherein 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, wherein smoothness is related to an absence of roughness, and wherein the preset smoothness value is achieved by an overlap area being generated between adjacent cavitation bubbles located on the at least one cavitation bubble path,
wherein, in order to achieve the preset smoothness value, a preset distance between adjacent cavitation bubbles and the overlap area to be generated between adjacent cavitation bubbles is determined based on a diameter (A) of a respective cavitation bubble of the plurality of cavitation bubbles, wherein the preset distance between adjacent cavitation bubbles corresponds to the formula [A/(30.25)], and
wherein the control of the laser is effected such that a lenticular volume body is separated.
 
14. A non-transitory computer-readable medium storing instruction that, when executed by a processor, cause a treatment device with at least one laser for separation of a volume body with a predefined posterior interface and a predefined anterior interface of a human or animal cornea using photodisruption with at least one control device for controlling the laser to execute a method comprising:
controlling the laser using a control device such that the laser emits pulsed laser pulses in a shot sequence in a predefined pattern into the cornea, wherein the predefined posterior and anterior interfaces of the volume body to be separated are defined by the predefined pattern and the predefined posterior and anterior interfaces are generated by an interaction of the pulsed laser pulses with the cornea that occurs due to a plurality of cavitation bubbles being generated by photodisruption,
wherein 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, wherein smoothness relates to an absence of roughness, and wherein the preset smoothness value is achieved by an overlap area being generated between adjacent cavitation bubbles located on the at least one cavitation bubble path,
wherein, in order to achieve the preset smoothness value, a distance between adjacent cavitation bubbles and the overlap area to be generated between adjacent cavitation bubbles is determined based on a diameter (A) of a respective cavitation bubble of the plurality of cavitation bubbles, wherein the preset distance between adjacent cavitation bubbles corresponds to the formula [A/(30.25)], and
wherein the control of the laser is effected such that a lenticular volume body is separated.
 
15. A method for controlling an eye surgical laser for separation of a volume body with a predefined posterior interface and a predefined anterior interface from a human or animal cornea, comprising:
controlling the laser using a control device such that the laser emits pulsed laser pulses in a shot sequence in a predefined pattern into the cornea, wherein the control of the laser is effected such that topographic, pachymetric and morphologic data of the cornea are taken into account,
wherein the predefined posterior and anterior interfaces of the volume body to be separated are defined by the predefined pattern, and the predefined posterior and anterior interfaces are generated by an interaction of the pulsed laser pulses with the cornea that occurs due to a plurality of cavitation bubbles being generated by photodisruption,
wherein 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, wherein smoothness is related to an absence of roughness, and wherein the preset smoothness value is achieved by an overlap area being generated between adjacent cavitation bubbles located on the at least one cavitation bubble path,
wherein, in order to achieve the preset smoothness value, a preset distance between adjacent cavitation bubbles and the overlap area to be generated between adjacent cavitation bubbles is determined based on a diameter (A) of a respective cavitation bubble of the plurality of cavitation bubbles, wherein the preset distance between adjacent cavitation bubbles corresponds to the formula [A/(30.25)], and
wherein the control of the laser is effected such that a lenticular volume body is separated.