Annular and other ablation profiles for refractive surgery systems and methods
AssigneeAMO Development, LLC
InventorsGuang-ming Dai, Michael Brownell
Life of this patent
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Abstract
Systems, methods, and computer program products are provided for the administration of annular and other ablation profiles during refractive surgery treatments. Basis data framework techniques enable the implementation of both circular and annular ablation profiles resulting in increased ablation efficiency when treating certain vision conditions. In some instances, systems or treatments involve the use of symmetric and asymmetric ablations shapes such as double spots, triple spots, quadruple spots, multiple spots, arc shapes, elliptical shapes, and the like.
Claims20
A system for ablating optical tissue in an eye of a patient, the system comprising:
- a laser mechanism that generates multiple laser beam pulses, each laser beam pulse having an original geometry;
- a mechanical block mechanism that transforms the laser beam pulses, each transformed laser beam pulse having an annular geometry, the mechanical block mechanism having an adjustable iris mechanism and a central block mechanism including one or more obscuration elements that can be positioned along a laser beam path and aligned with the adjustable iris mechanism to define an annular shaped passage;
- and
- a delivery mechanism that directs the transformed laser beam pulses toward the eye of the patient so as to ablate the optical tissue,
- wherein the obscuration element is positionable to block an inner portion of the original geometry laser beam pulse, and an outer portion of the original geometry laser beam pulse transmitted through the annular shaped passage provides the transformed laser beam pulse having the annular geometry.
A method for ablating optical tissue in an eye of a patient, the method comprising:
- generating multiple laser beam pulses with a laser, each laser beam pulse having an original geometry;
- transforming the laser beam pulses with a mechanical block mechanism, each transformed laser beam pulse having an annular geometry;
- and
- directing the transformed laser beam pulses toward the eye of the patient so as to ablate the optical tissue.
A system for ablating optical tissue in an eye of a patient, the system comprising:
- a laser mechanism that generates multiple laser beam pulses, each laser beam pulse having an original geometry;
- a mechanical block mechanism that transforms the laser beam pulses, each transformed laser beam pulse having an annular geometry;
- and
- a delivery mechanism that directs the transformed laser beam pulses toward the eye of the patient so as to ablate the optical tissue.
Dependencies are inferred from the claim text.