Imaging-controlled laser surgical system
AssigneeAlcon LenSx, Inc.
InventorsGautam Chaudhary, Peter Goldstein, Imre Hegedus, Carlos German Suarez, David Calligori, Michael Karavitis
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Abstract
An imaging-based laser system can include a laser-beam system, configured to generate and scan a beam of laser pulses with an adjustable laser-power parameter to points of a scan-pattern in an eye, and an imaging-based laser-controller, configured to image a layer in the eye, to control the scanning of the beam of laser pulses to the points of the scan-pattern, and to control a laser-power parameter of the laser pulses according to the distance of the points of the scan-pattern from the imaged layer.
Claims17
An imaging-based laser system, comprising:
- a laser engine configured to generate a beam of laser pulses;
- an imaging-based laser-controller configured to:
- determine z-depths of a sequence of points in a scan-pattern that correspond to a layer of the eye imaged by an imaging system;
- generate a tracking band within the scan pattern defining the incision to be made in the eye, wherein a lower boundary of the tracking band has a non-uniform z-depth that varies according to the determined z-depths of the sequence of points corresponding to the imaged layer;
- cause a beam scanner to scan the beam of laser pulses to the points of the scan-pattern, and
- cause a beam attenuator to control the laser-power parameter of the laser pulses such that a laser power parameter of laser pulses in the tracking band is above a photo-disruption threshold, and a laser power parameter of laser pulses outside the tracking band is below the photo-disruption threshold.
A method, comprising:
- generating an image, with an imaging system, of a layer of an eye that is tilted relative to a z-axis of an incision to be made in the eye;
- determining, with an imaging-based laser-controller, z-depths of a sequence of points in a scan-pattern that correspond to the image of the layer;
- generating, with the imaging-based laser-controller, a tracking band within the scan pattern defining the incision to be made in the eye, wherein a lower boundary of the tracking band has a non-uniform z-depth that varies according to the determined z-depths of the sequence of points corresponding to the image of the layer;
- directing, with the imaging-based laser-controller, a beam of laser pulses to the points of the scan-pattern to create the incision defined by the tracking band.
A non-transitory computer-readable medium storing instructions that, when executed, cause a processor of an imaging-based laser system to:
- analyze an image of a layer of an eye that is tilted relative to a z-axis of an incision to be made in the eye;
- determine z-depths of a sequence of points in a scan-pattern that correspond to the layer;
- generate a tracking band within the scan pattern defining the incision to be made in the eye, wherein a lower boundary of the tracking band has a non-uniform z-depth that varies according to the determined z-depths of the sequence of points corresponding to the image of the layer;
- generate signals to cause an imaging-based laser-controller system to direct a beam of laser pulses to the points of the scan-pattern to create the incision defined by the tracking band.
Dependencies are inferred from the claim text.