Nozzle unit for cross-linking of eye tissue

1. A nozzle device comprising:

at least two nozzle units for cross-linking of an eye tissue of an eye, each nozzle unit in the at least two nozzle units comprising:

a dosing device configured to provide a predefined dose of a photosensitizer,

a pressure-generating device configured to generate a pressure in the dosing device, and

at least one outlet nozzle configured to discharge the dose of the photosensitizer, in a puff-type manner and in the form of at least one stream or stream bundle, through an outlet opening of the outlet nozzle; and

a nozzle positioning device for a spatial positioning of each of the outlet nozzles of the at least two nozzle units relative to the eye to be treated.

2. The nozzle device according to claim 1 , wherein each outlet nozzle is configured to spatially focus the discharged stream or the discharged stream bundle.

3. The nozzle device according to claim 1 , wherein each nozzle unit further comprises a control device configured to set the pressure generated by each pressure-generating device.

4. The nozzle device according to claim 1 , further comprising an evaluation unit configured to calculate a distribution of active agent on the basis of diagnostic data.

5. The nozzle device according to claim 1 , further comprising an eye-tracking device configured to apply active agent on a moving eye in a targeted manner.

6. The nozzle device according to claim 3 , wherein the control device is configured to set the pressure generated by each pressure-generating device such that the stream or the stream bundle discharged by each cutlet nozzle penetrates corneal eye tissue up to a predefined penetration depth.

7. The nozzle device according to claim 1 , wherein each nozzle unit further comprises a reservoir having a supply of photosensitizer.

8. The nozzle device according to claim 1 , further comprising at least one light source configured to cross-link eye tissue by curing the photosensitizer introduced into the eye tissue.

9. The nozzle device according to claim 1 ,

wherein the positioning device is configured to spatially position each of the outlet nozzles relative to one another.

10. The nozzle device according to claim 1 , wherein the positioning device is configured to spatially position the outlet nozzles relative to one another with an eye-tracking device, such that the outlet openings are arranged in a flat plane and the discharged streams or stream bundles extend substantially parallel to one another.

11. The nozzle device according to claim 1 , wherein the positioning device is configured to spatially position the outlet nozzles relative to one another such that the outlet openings are arranged in a curved plane adapted to the contour of the eye to be treated, such that the discharged streams or stream bundles can enter the eye substantially perpendicularly to the contour of the eye to be treated.

12. A method for cross-linking eye tissue of an eye, comprising:

arranging at least two nozzle units for cross-linking the eye tissue of the eye within a nozzle positioning device, wherein each of the at least two nozzle units comprises at least one outlet nozzle configured to be spatially positioned relative to the eye to be treated, a dosing device configured to provide a predefined dose of a photosensitizer, and a pressure-generating device;

providing a predefined dose of a photosensitizer in the dosing devices of the at least two nozzle units;

generating, by the pressure-generating device, a pressure in the dosing devices of the at least two nozzle units; and

discharging the dose of the photosensitizer, in a puff-type manner and in the form of at least one stream or stream bundle, through an outlet opening of each of the at least one outlet nozzles of the at least two nozzle units to the eye tissue of the eye.

13. The method according to claim 12 , wherein the discharged stream or the discharged stream bundle is spatially focused.

14. The method according to claim 13 , wherein the generated pressure can be set such that the discharged stream or the discharged stream bundle penetrates corneal tissue up to a predefined penetration depth.

15. The method according to claim 12 , wherein the positioning device is configured to spatially position the outlet nozzles relative to one another such that the outlet openings are arranged in a curved plane adapted to the contour of the eye to be treated, such that the discharged streams or stream bundles can enter the eye substantially perpendicularly to a contour of the eye to be treated.