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US 8,403,921 B2Granted
Method and apparatus for patterned plasma-mediated laser trephination of the lens capsule and three dimensional phaco-segmentation
AssigneeOptimedica Corporation
InventorsDaniel V. Palankar, Mark S. Blumenkranz, Dan E. Andersen, David H. Mordaunt
Life of this patent
Estimating the term…
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.
Claims23
A system for cataract surgery on an eye of a patient, comprising:
- a laser assembly for generating a pulsed laser treatment beam that creates dielectric breakdown in a focal zone of the treatment beam within tissues of the patient's eye so as to effect a cataract surgery procedure;
- an optical coherence tomography (OCT) 3-Dimensional imaging system configured for imaging tissue of a cataractous crystalline lens of the patient;
- an optical scanning system configured for positioning the focal zone of the treatment beam to targeted locations of the crystalline lens;
- and
- a computer control system operatively coupled to the laser assembly, the imaging system, and the optical scanning system, and programmed to automatically:
- a) acquire image data from locations distributed throughout a volume of the cataractous crystalline lens using the imaging system;
- b) construct one or more images of the patient's eye tissues from the image data, comprising an image of at least a portion of the crystalline lens;
- c) construct 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
- d) operate the optical scanning system and laser assembly to direct a treatment beam in a pattern based on the anterior capsulotomy cutting region so as to create an anterior capsulotomy in the crystalline lens.
7 more elements
A system for cataract surgery on an eye of a patient, comprising:
- a laser assembly for generating a pulsed laser treatment beam that creates dielectric breakdown in a focal zone of the treatment beam within tissues of the patient's eye so as to effect a cataract surgery procedure;
- an optical coherence tomography 3-Dimensional imaging system configured for imaging tissue of a cataractous crystalline lens of the patient;
- an optical scanning system configured for positioning the focal zone of the treatment beam to targeted locations of the crystalline lens;
- and
- a computer control system operatively coupled to the laser assembly, the imaging system, and the optical scanning system, and programmed to automatically:
- a) acquire image data from locations distributed throughout a volume of the crystalline lens using the imaging system;
- b) identify one or more tissue structures of the cataractous crystalline lens based on the image data, the one or more structures comprising an anterior capsule boundary;
- c) construct 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
- d) operate the optical scanning system and laser assembly to direct a treatment beam in a pattern based on the anterior capsulotomy cutting region so as to create an anterior capsulotomy in the crystalline lens.
7 more elements
A system for cataract surgery on an eye of a patient, comprising:
- a laser assembly for generating a pulsed laser treatment beam that creates dielectric breakdown in a focal zone of the treatment beam within tissues of the patient's eye so as to effect a cataract surgery procedure;
- an optical coherence tomography 3-Dimensional imaging system configured for imaging tissue of a cataractous crystalline lens of the patient;
- an optical scanning system configured for positioning the focal zone of the treatment beam to targeted locations of the crystalline lens;
- and
- a computer control system operatively coupled to the laser assembly, the imaging system, and the optical scanning system, and programmed to automatically:
- a) scan the patient's eye tissues with the imaging system so as to acquire image data of at least a portion of the crystalline lens;
- b) construct one or more images of the patient's eye tissues from the image data, comprising an image of at least a portion of the crystalline lens;
- c) construct 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;
- d) construct a lens fragmentation region comprising a posterior boundary that does not transect the posterior capsule of the lens;
- e) operate the optical scanning system and laser assembly to direct a treatment beam in a first pattern based on the anterior capsulotomy cutting region so as to create an anterior capsulotomy in the crystalline lens;
- and
- f) operate the optical scanning system and the laser assembly to direct a treatment beam in a second pattern based on the fragmentation region so as to fragment the crystalline lens.
9 more elements
A system for cataract surgery on an eye of a patient, comprising:
- a laser assembly for generating a pulsed laser treatment beam that creates dielectric breakdown in a focal zone of the treatment beam within tissues of the patient's eye so as to effect a cataract surgery procedure;
- a 3-dimensional (3-D) imaging system configured for imaging tissue of a cataractous crystalline lens of the patient;
- an optical scanning system configured for positioning the focal zone of the treatment beam to targeted locations of the crystalline lens;
- and
- a computer control system operatively coupled to the laser assembly, the imaging system, and the optical scanning system, and programmed to automatically:
- a) acquire image data of the crystalline lens using the imaging system;
- b) identify one or more tissue structures of the cataractous crystalline lens based on the image data, the one or more structures comprising an anterior capsule portion;
- c) construct a 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, wherein the posterior cutting boundary is anterior to a posterior capsule of the lens;
- d) operate the optical scanning system and laser assembly based on the constructed cutting region so as to direct a treatment beam in a first cutting pattern so as to create an anterior capsulotomy in the anterior capsule portion of the lens;
- and
- e) operate the optical scanning system and laser assembly based on the constructed cutting region so as to direct a treatment beam in a second cutting pattern so as to effect cutting of cataractous lens tissue of the cutting region into a plurality of patterned segments or fragmented pieces for subsequent removal.
8 more elements
Dependencies are inferred from the claim text.