Method and Apparatus for Creating Ocular Surgical and Relaxing Incisions

Patent metadata

Field	Value
Publication number	US-2021161654-A1
Application number	US-202117177872-A
Country	US
Kind code	A1
Filing date	Feb 17, 2021
Priority date	Mar 13, 2007
Publication date	Jun 3, 2021
Grant date	—

Abstract

A system and method of treating target tissue in a patient's eye, which includes generating a light beam, deflecting the light beam using a scanner to form first and second treatment patterns, delivering the first treatment pattern to the target tissue to form an incision that provides access to an eye chamber of the patient's eye, and delivering the second treatment pattern to the target tissue to form a relaxation incision along or near limbus tissue or along corneal tissue anterior to the limbus tissue of the patient's eye to reduce astigmatism thereof.

First claim

1 .- 15 . (canceled)

16 . A method for treating target tissue in a patient's eye, comprising:
by an ultrafast laser source, generating a laser beam having a plurality of laser pulses; by an Optical Coherence Tomography (OCT) device, generating signals representing an image of a cornea and limbus of the eye; by a controller, determining a treatment pattern based upon the signals from the OCT device; and by a scanner under control of the controller, scanning a focal point of the laser beam according to the treatment pattern to form a cataract incision in the cornea that provides access for lens removal instrumentation to a crystalline lens of the patient's eye and one or more relaxation incisions in the cornea or limbus, wherein the cataract incision has an arcuate extent of less than 360 degrees in a top view, wherein the cataract incision includes a bevel shape in a cross-sectional view, the bevel shape including a first segment and a second segment which intersect each other at an angle, the cataract incision being entirely located in the cornea and intersecting both an anterior surface and a posterior surface of the cornea.

17 . The method of claim 16 , wherein at least one of the one or more relaxation incisions only partially extends through the target tissue.

18 . The method of claim 16 , further comprising: by a profilometer, measuring a surface profile of a surface of the cornea of the patient's eye, wherein the controller determines the treatment pattern in response to the measured surface profile.

19 . The method of claim 16 , wherein the OCT device measures scattering properties from different locations on the patient's eye, and wherein the controller determines the treatment pattern in response to the scattering properties.

20 . The method of claim 16 , wherein the controller operates the laser source and scanner to create incisions within the tissue at a depth based upon the signals from the OCT device.

21 . The method of claim 16 , wherein the laser beam has a wavelength between 1010 nm to 1100 nm.

22 . The method of claim 16 , wherein the laser pulses have pulse lengths of 100 fs to 10000 fs.

23 . The method of claim 16 , wherein the laser pulses have a pulse repetition frequency of 10 kHz to 250 kHz.

24 . The method of claim 16 , further comprising: by a wavefront sensing system, measuring an optical aberration of the eye.

25 . The method of claim 24 , wherein the step of measuring the optical aberration of the eye includes using a Shack-Hartmann wavefront sensor to measure a shape of a wavefront of light that exits the eye's pupil.

26 . The method of claim 25 , wherein the step of determining a treatment pattern includes determining a correction to the shape of the cornea based on the shape of the wavefront.

Assignees

• Amo Dev Llc

Inventors

• Culbertson William
• Angeley David
• Marcellino George R
• Andersen Dan

Classifications

• A61F2/16 Primary

  Intraocular lenses · CPC title

• A61F9/00754

  for cutting or perforating the anterior lens capsule, e.g. capsulotomes · CPC title

• A61F9/00825

  for photodisruption · CPC title

• A61F9/00

  Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand (caps with means for protecting the eyes A42B1/0181; visors for helmets A42B3/22; eye baths A61H35/02; sunglasses or goggles having the same features as spectacles G02C) · CPC title

• A61F2009/00897

  Scanning mechanisms or algorithms · CPC title