Method and apparatus for patterned plasma-mediated laser trephination of the lens capsule and three dimensional phaco-segmentation
AssigneeOptimedica Corporation
InventorsMark S. Blumenkranz, Daniel V. Palanker, David H. Mordaunt, Dan E. Andersen
Life of this patent
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Abstract
System and method for making incisions in eye tissue at different depths. The system and method focuses light, possibly in a pattern, at various focal points which are at various depths within the eye tissue. A segmented lens can be used to create multiple focal points simultaneously. Optimal incisions can be achieved by sequentially or simultaneously focusing lights at different depths, creating an expanded column of plasma, and creating a beam with an elongated waist.
Claims24
A method for cataract surgery on an eye of a patient using a pulsed laser surgical system, comprising:
- operating an imaging system so as to acquire image data from locations distributed throughout a volume of a cataractous crystalline lens of the patient and construct one or more images of the patient's eye tissues from the image data, wherein the one or more images comprise an image of at least a portion of the crystalline lens;
- constructing, using a computer system, an anterior capsulotomy cutting region based on the image data, the capsulotomy cutting region comprising an anterior cutting boundary axially spaced from a posterior cutting boundary so as to define an axially-elongated cutting zone transecting the anterior capsule;
- and
- operating the surgical system to direct a pulsed laser treatment beam in a pattern based on the anterior capsulotomy cutting region so as to create an anterior capsulotomy in the crystalline lens.
A method for cataract surgery on an eye of a patient using a pulsed laser surgical system, comprising:
- operating an optical coherence tomography (OCT) imaging system so as to acquire OCT image data from locations distributed throughout a volume of a crystalline lens of the patient;
- processing the image data using a computer system so as to identify and locate within the patient's lens an anterior capsulotomy cutting region comprising an anterior cutting boundary axially spaced from a posterior cutting boundary so as to define an axially-elongated cutting zone transecting the anterior capsule;
- and
- operating the surgical system to direct a treatment laser beam in a pattern based on the anterior capsulotomy cutting region so as to create an anterior capsulotomy in the crystalline lens, wherein positioning of the treatment beam focal zone in the lens during the patterned cutting is guided by the computer system based on the constructed cutting region.
A method for cataract surgery on an eye of a patient using a pulsed laser surgical system, comprising:
- scanning the patient's eye tissues with an imaging system so as to acquire image data of at least a portion of a crystalline lens of the patient and construct an image of at least a portion of the crystalline lens;
- constructing, using a computer system, an anterior capsulotomy cutting region based on the image data comprising an anterior cutting boundary axially spaced from a posterior cutting boundary so as to define an axially-elongated cutting zone transecting the anterior capsule;
- constructing, using the computer system, a lens fragmentation region comprising a posterior boundary that does not transect the posterior capsule of the lens;
- operating the surgical system to (a) direct a treatment laser beam in a first pattern based on the anterior capsulotomy cutting region so as to create an anterior capsulotomy in the crystalline lens;
- and (b) direct a treatment laser beam in a second pattern based on the fragmentation region so as to fragment the crystalline lens into a plurality of discrete patterned pieces for subsequent removal, wherein the positioning of the treatment laser beam in the first and second patterns is guided by the computer system.
A method for surgery on an eye of a patient using a pulsed laser surgical system, comprising:
- operating an imaging system so as to acquire image data from locations distributed throughout a volume of a crystalline lens of the patient;
- processing the image data using a computer system so as to construct cutting region data identifying (a) an anterior cutting boundary axially spaced from a posterior cutting boundary so as to define an axially-elongated cutting zone transecting the anterior capsule, and (b) a location of the cutting region within the patient's lens;
- determining parameters of a cutting pattern based on the image data and/or cutting region data;
- and
- operating the surgical system to direct a focal zone of a laser treatment beam within the lens, wherein positioning of the treatment beam focal zone within the lens is guided by the computer system based on the cutting pattern so as to incise an anterior capsulotomy in the crystalline lens.
Dependencies are inferred from the claim text.