Ophthalmological laser system

Patent metadata

Field	Value
Publication number	US-9918874-B2
Application number	US-201514789281-A
Country	US
Kind code	B2
Filing date	Jul 1, 2015
Priority date	Mar 12, 2009
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

An ophthalmological laser system for photodisruptive irradiation of ocular tissue, including a crystalline lens or a cornea. The system includes an ultra-short pulse laser, the radiation of which is focusable as illumination light via an illumination beam path including a scanner unit and focusing optics. A control unit is programmed to execute determining irradiation control data for photodisruptions at irradiation points in an interior of the ocular tissue distributed three-dimensionally and non-equidistantly to create at least one predetermined target incision. The laser system then irradiates the ocular tissue according to the determined irradiation control data.

First claim

What is claimed is:

1. A method for photodisruptive laser treatment by application of laser energy to ocular tissue, the ocular tissue including a crystalline lens or a cornea, the method comprising:
determining irradiation control data for photodisruptions at a plurality of irradiation points in the interior of the ocular tissue to create at least one predetermined target incision, wherein the irradiation points are arranged regularly and in such a way that a compensation of a refractive deficit results through constructive interference in the light passing through the ocular tissue; and
controlling a laser to irradiate the ocular tissue according to the determined irradiation control data.

2. The method for the photodisruptive laser treatment of ocular tissue, according to claim 1 , further comprising
further determining irradiation control data for the photodisruptions at the plurality of the irradiation points in the interior of the ocular tissue to create at least one predetermined target incision in such a way that different spatial expansions result for at least some of the photodisruptions to be produced; and
controlling the laser to irradiate the ocular tissue according to the determined irradiation control data.

3. The method for the photodisruptive laser treatment of ocular tissue, according to claim 2 , further comprising distributing the different spatial expansions statistically.

4. The method for the photodisruptive laser treatment of ocular tissue, according to claim 1 , further comprising determining at least one property of the ocular tissue before the determination of irradiation control data and taking the at least one property into account for the determination of the irradiation control data and/or for a correction of the irradiation control data.

5. The method for the photodisruptive laser treatment of ocular tissue, according to claim 1 , further comprising taking into account an efficiency of the photodisruptive irradiation, position-dependent with regard to the ocular tissue for the determination of the irradiation control data and/or a correction of the irradiation control data.

6. The method for the photodisruptive laser treatment of ocular tissue, according to claim 1 , further comprising producing a non-equidistant arrangement of the irradiation points through spatially non-equidistant control signals by control of operation of a pulse picker, and arranging the pulse picker before or after a laser amplification arrangement.

7. A non-transitory computer readable data storage medium that is not a carrier wave or signal, comprising instructions for photodisruptive laser treatment of ocular tissue, the ocular tissue including a crystalline lens or a cornea, the instructions being adapted to control a laser device emitting laser radiation for surgically correcting defective vision of an eye, the instructions comprising:
determining irradiation control data for photodisruptions at a plurality of irradiation points in the interior of the ocular tissue to create at least one predetermined target incision, wherein the irradiation points are arranged regularly and in such a way that a compensation of a refractive deficit results through constructive interference in the light passing through the ocular tissue; and
controlling a laser to irradiate the ocular tissue according to the determined irradiation control data.

8. The non-transitory computer readable data storage medium according to claim 7 , the instructions further comprising
further determining irradiation control data for the photodisruptions at the plurality of the irradiation points in the interior of the ocular tissue to create at least one predetermined target incision in such a way that different spatial expansions result for at least some of the photodisruptions to be produced; and
controlling the laser to irradiate the ocular tissue according to the determined irradiation control data.

9. The non-transitory computer readable data storage medium according to claim 2 , the instructions further comprising distributing the different spatial expansions statistically.

10. The non-transitory computer readable data storage medium, according to claim 7 , the instructions further comprising determining at least one property of the ocular tissue before the determination of irradiation control data and taking the at least one property into account for the determination of the irradiation control data and/or for a correction of the irradiation control data.

11. The non-transitory computer readable data storage medium, according to claim 7 , the instructions further comprising taking into account an efficiency of the photodisruptive irradiation, position-dependent with regard to the ocular tissue for the determination of the irradiation control data and/or a correction of the irradiation control data.

12. The non-transitory computer readable data storage medium, according to claim 7 , the instructions further comprising producing a non-equidistant arrangement of the irradiation points through spatially non-equidistant control signals by control of operation of a pulse picker.

Assignees

• Zeiss Carl Meditec Ag

Inventors

• Dick Manfred
• Reich Matthias
• Grebner Dieter

Classifications

• A61F2009/0087

  Lens · CPC title

• A61F9/008

  using laser · CPC title

• A61F2009/00897

  Scanning mechanisms or algorithms · CPC title

• A61F2009/00872

  Cornea · CPC title

• A61F9/00838 Primary

  Correction of presbyopia · CPC title