Method of correcting higher-order aberrations using laser vision correction
AssigneeAlcon Inc.
InventorsImre HEGEDUS, Zsolt BOR
Life of this patent
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Abstract
The disclosure provides a method for correcting higher-order aberrations including providing a laser radiation. The method also includes controlling a location of a beam focal point of the laser radiation by a system of scanners and guiding the beam focal point in such a way that the location of the beam focal point is in a cornea of an eye. The method further includes introducing the laser radiation into the cornea of the eye. The method includes cutting a lenslet, wherein a thickness of the lenslet t(X,Y) satisfies a following equation: t(X,Y)=t0+Δt(X,Y)/(n−1), where Δt(X,Y) represents a higher-order wavefront elevation and t0 represents the thickness of the lenslet having a spherical refractive power of D.
Claims21
-20. (canceled)
A method for correcting higher-order aberrations, comprising:
- obtaining a curve of an initial surface (R) of a lenslet to facilitate spherical correction of refractive error in an eye;
- controlling a location of a beam focal point of laser radiation by a system of scanners and guiding the beam focal point in such a way that the location of the beam focal point is in a cornea of the eye;
- and
- cutting the lenslet according to a final surface of the lenslet, the final surface of the lenslet varied from the curve of the initial surface (R) of the lenslet to correct the higher-order aberrations, comprising:
- determining a variation in a radius to reach the final surface of the lenslet;
- and
- varying the system of scanners to achieve the variation.
A method for correcting higher-order aberrations, comprising:
- providing a laser radiation;
- controlling a location of a beam focal point of the laser radiation by a system of scanners and guiding the beam focal point in such a way that the location of the beam focal point is in a cornea of an eye;
- introducing the laser radiation into the cornea of the eye;
- and
- cutting a lenslet via the laser radiation, a cross-section of the lenslet showing an anterior lenslet surface having a plurality of convex curves and having a plurality of concave curves, each convex curve of the plurality of convex curves being convex relative to an anterior corneal surface, each concave curve of the plurality of concave curves being concave relative to the anterior corneal surface.
A pulse laser device for correcting higher-order aberrations, comprising:
- a laser source that provides a laser radiation;
- a system of scanners configured to control a location of a beam focal point of the laser radiation;
- and
- a computing device configured to perform operations comprising:
- obtaining a curve of an initial surface (R) of a lenslet to facilitate spherical correction of refractive error in an eye;
- instructing the system of scanners to control a location of a beam focal point of the laser radiation in such a way that the location of the beam focal point is in a cornea of the eye;
- and
- guiding the laser radiation to cut the lenslet according to a final surface of the lenslet, the final surface of the lenslet varied from the curve of the initial surface (R) of the lenslet to correct the higher-order aberrations, the operation of guiding the laser radiation comprising:
- determining a variation in a radius to reach the final surface of the lenslet;
- and
- instructing the system of scanners to guide the laser radiation according to the determined variation.
Dependencies are inferred from the claim text.