Combination of excimer laser ablation and femtosecond laser technology
View Patent ↗The invention relates to an apparatus and a method for providing data for vision correction utilizing a volumetric ablation and an intrastromal manipulation. The provided data may be used by a laser ablating the surface of the cornea in combination with a laser which operates intrastromal to optimize a corneal re-shaping procedure. One aspects of the invention relates to the minimization of the amount of corneal tissue to be removed.
1. A system for providing data for vision correction utilizing a volumetric ablation and an intrastromal manipulation, comprising:
first computer software receiving diagnostic data representing a refractive error of a cornea of an eye;
second computer software calculating at least one volumetric ablation profile based on said diagnostic data;
third computer software calculating at least one intrastromal manipulation based on said diagnostic data;
fourth computer software selecting at least one volumetric ablation profile and at least one intrastromal manipulation to optimize a combined treatment of a volumetric ablation and an intrastromal manipulation to correct said refractive error;
wherein the intrastromal manipulation causes a bio-dynamic shape change of at least a portion of the cornea.
2. The system of claim 1 , wherein the combined treatment is optimized by selecting a specific ablation profile and a corresponding intrastromal manipulation such that the amount of corneal tissue to be ablated by volumetric ablation is minimized.
3. The system of claim 1 , wherein the combined treatment is optimized such that the intrastromal manipulation is selected based on a given set of desired corrections.
4. The system of claim 1 , wherein the intrastromal manipulations at least partially flattens the cornea.
5. The system of claim 1 , wherein the volumetric ablation compensates for low order aberrations, preferably up to the second order.
6. The system of claim 1 , wherein the intrastromal manipulations compensates for high order aberrations, preferably from the third order.
7. The system of claim 1 , wherein the intrastromal manipulation is a disruption.
8. The system of claim 1 , wherein the intrastromal manipulation is formed with a femtosecond laser.
9. The system of claim 1 , wherein calculating said at least one intrastromal manipulation comprises determining the location and/or length, width and depth of the manipulation.
10. The system of claim 1 , wherein at least one of the intrastromal manipulations is located outside the dark adapted pupil.
11. The system of claim 1 , wherein the volumetric ablation is located at least partially within the dark adapted pupil.
12. The system of claim 1 , wherein the at least one intrastromal manipulation at least compensates for induced refractive errors caused by the volumetric ablation.
13. The system of claim 1 , wherein the diagnostic data comprises a refractive error obtained by subjective patient information and/or a wavefront measurement and/or a topographic measurement.
14. The system of claim 1 , wherein the volumetric ablation is an excimer laser ablation.
15. The system of claim 1 , further comprising fifth computer software controlling a laser apparatus responsive to the provided data for vision correction.
16. The system of claim 1 , further comprising fifth computer software controlling an excimer laser responsive to the calculated volumetric ablation profile and controlling a femtosecond laser responsive to the at least one calculated intrastromal manipulation.
17. The system of claim 1 , further comprising a laser treatment system with an excimer laser, and a femtosecond laser.