# US 11,998,486 B2 · Apparatus for patterned plasma-mediated laser ophthalmic surgery

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- Number: US 11,998,486 B2
- Document ID: US11998486B2
- Status: Granted
- Kind: B2
- Application number: 17/453,825
- Filed: 2021-11-05
- Published: 2022-02-24
- Granted: 2024-06-04
- Earliest claimed: 2005-01-10
- Assignees: AMO Development, LLC
- Applicants: AMO Development, LLC
- Inventors: Daniel V. Palanker; Mark S. Blumenkranz; David H. Mordaunt; Dan E. Andersen
- Web page: https://patentgrep.com/patent/US11998486B2

## CPC

- A61F 9/008: using laser
- A61B 18/20: using laser
- A61B 90/361: {Image-producing devices, e.g. surgical cameras}
- A61F 2/1602: {Corrective lenses for use in addition to the natural lenses of the eyes or for pseudo-phakic eyes}
- A61F 9/00736: {Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments (A61F9/008 takes precedence)}
- A61F 9/00754: {for cutting or perforating the anterior lens capsule, e.g. capsulotomes}
- A61F 9/00812: {Inlays; Onlays; Intraocular lenses [IOL]}
- A61F 9/00814: {Laser features or special beam parameters therefor}
- A61F 9/00825: {for photodisruption}
- A61F 9/00831: {Transplantation}
- A61F 9/00834: {Inlays; Onlays; Intraocular lenses [IOL]}
- A61F 9/00836: {Flap cutting}
- A61F 9/00838: {Correction of presbyopia}
- A61F 9/0084: {Laser features or special beam parameters therefor}
- A61F 9/009: Auxiliary devices making contact with the eyeball and coupling in laser light, {e.g. goniolenses (apparatus for eye examination A61B3/0008)}
- A61B 2018/00577: {Ablation}
- A61F 2009/00844: {Feedback systems}
- A61F 2009/00851: {Optical coherence topography [OCT]}
- A61F 2009/00865: {Sclera}
- A61F 2009/0087: {Lens}
- A61F 2009/00878: {Planning}
- A61F 2009/00882: {based on topography}
- A61F 2009/00887: {Cataract}
- A61F 2009/00889: {Capsulotomy}
- A61F 2009/00895: {Presbyopia}
- A61F 2009/00897: {Scanning mechanisms or algorithms}
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A system for ophthalmic surgery on an eye includes: a pulsed laser which produces a treatment beam; an OCT imaging assembly capable of creating a continuous depth profile of the eye; an optical scanning system configured to position a focal zone of the treatment beam to a targeted location in three dimensions in one or more floaters in the posterior pole. The system also includes one or more controllers programmed to automatically scan tissues of the patient's eye with the imaging assembly; identify one or more boundaries of the one or more floaters based at least in part on the image data; iii. identify one or more treatment regions based upon the boundaries; and operate the optical scanning system with the pulsed laser to produce a treatment beam directed in a pattern based on the one or more treatment regions.

## Claims

### Claim 1

A method implemented in a laser surgical system which includes a control system, the method being implemented in the control system for making incisions in ocular tissue of an eye, the method comprising:
operating an imaging device to acquire image data corresponding to a depth profile of the eye, the depth profile including information regarding locations of one or more ocular tissues in a posterior pole of the eye;
identifying one or more treatment regions in the posterior pole based up the image data;
identifying a location of a target tissue near the posterior pole based in part on the image data;
determining a treatment scanning pattern within the one or more treatment regions based in part on the image data;
operating a laser of the laser surgical system to generate a pulsed laser beam having a plurality of laser pulses; and
operating a scanning assembly of the laser surgical system to scan a focal zone of the pulsed laser beam according to the treatment scanning pattern within the one or more treatment regions, wherein each of the plurality of laser pulses of the pulsed laser beam scanned according to the treatment scanning pattern is sufficient to create a rupture zone in the ocular tissue in the posterior pole.

### Claim 2 (depends on 1)

The method of claim 1, wherein the target tissue includes floaters.

### Claim 3 (depends on 1)

The method of claim 1, wherein the target tissue includes membranes.

### Claim 4 (depends on 1)

The method of claim 1, wherein the target tissue includes a retina tissue.

### Claim 5 (depends on 1)

The method of claim 1, wherein each laser pulse of the plurality of laser pulses has a wavelength between 800 nm and 1,100 nm, a pulse energy between 1.0 microjoules and 1000 microjoules, a pulse duration between about 100 femtoseconds and about 10 picoseconds, and a pulse repetition rate between 1 kHz and about 100 kHz.

### Claim 6 (depends on 5)

The method of claim 5, where a distance between consecutive laser pulses in the treatment scanning pattern is equal to or less than a width of the rupture zone.

### Claim 7 (depends on 6)

The method of claim 6, wherein the distance between consecutive pulses is determined by a scanning rate of the focal zone in the treatment zone and a repetition rate of the pulsed laser beam.

### Claim 8 (depends on 5)

They method of claim 5, wherein the pulse energy of the laser pulses in the treatment scanning pattern is a greater than a threshold energy for dielectric breakdown.

### Claim 9 (depends on 1)

The method of claim 1, wherein the step of operating the imaging device comprises operating an optical coherence tomography (OCT) imaging device.