Method and system for eye measurements and cataract surgery planning using vector function derived from prior surgeries

Patent metadata

Field	Value
Publication number	US-10582846-B2
Application number	US-201514949757-A
Country	US
Kind code	B2
Filing date	Nov 23, 2015
Priority date	Dec 30, 2010
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

Improved devices, systems, and methods for planning cataract surgery on an eye of a patient incorporate results of prior corrective surgeries into a planned cataract surgery of a particular patient by driving an effective surgery vector function based on data from the prior corrective surgeries. The exemplary effective surgery vector employs an influence matrix which may allow improved refractive corrections to be generated so as to increase the overall efficacy of a cataract surgery by specifying one or more parameters of an intraocular lens (IOL) to be implanted during the cataract surgery.

First claim

What is claimed is:

1. A method, comprising:
measuring a set of pre-surgery values for a plurality of optical properties of an eye of a current patient, including measuring at least pre-surgery values for high order aberrations of the eye of the current patient which have an order greater than two, with a wavefront measurement device, wherein the set of pre-surgery values includes the pre-surgery values for the high order aberrations of the eye of the current patient which have an order greater than two;
establishing a set of target post-surgery values for the plurality of optical properties of the eye of the current patient, including values for the high order aberrations of the eye of the current patient which have an order greater than two;
determining a set of intended refractive corrections to be applied to the eye as differences between the target post-surgery values for the plurality of optical properties of the eye of the current patient and the pre-surgery values for the plurality of optical properties of the eye of the current patient, wherein the set of intended refractive corrections to be applied to the eye of the current patient include intended refractive corrections to the high order aberrations of the eye of the current patient which have an order greater than two;
producing an effective surgery vector function by minimizing differences between: (1) sets of intended refractive corrections to be applied to eyes of previous patients and (2) sets of measured surgically induced refractive corrections for eyes of previous patients as a result of previous surgeries;
applying the effective surgery vector function, physician adjustments, and chromatic and cosine corrections to the intended refractive corrections to be applied to the eye to produce a set of adjusted intended refractive corrections to be applied to the eye of the current patient, including values for the high order aberrations of the eye of the current patient which have an order greater than two;
selecting one or more parameters of an intraocular lens (IOL) to be implanted into the eye of the current patient from the set of adjusted intended refractive corrections to be applied to the eye so as to transform the eye of the current patient to exhibit the target post-surgery values for the plurality of optical properties of the eye of the current patient,
wherein the selected one or more parameters of the IOL to be implanted into the eye of the current patient include a selected optical power of the IOL and a selected location in the eye of the current patient where the IOL is to be implanted,
implanting the IOL having the one or more selected parameters into the eye of the current patient at the selected location in the eye;
taking measurements during implantation of the IOL, with an optical measurement instrument which includes the wavefront measurement device, a pupil retroreflector illuminator and a detector, to determine whether the IOL is properly placed into the eye of the current patient;
using the pupil retroreflector illuminator to direct a disc shaped pattern of light to the eye of the current patient; and
detecting reflected light from the disc shaped pattern of light, reflected by the IOL implanted into the eye of the current patient, to determine if edges of the IOL are decentered and to determine if the IOL unfolded properly when the IOL was implanted into the eye of the current patient.

2. The method of claim 1 , wherein a plurality of values of the set of adjusted intended refractive corrections to be applied to the eye of the current patient are each altered by a plurality of values of the effective surgery vector function.

3. The method of claim 1 , further comprising:
supplying at least one of the one or more parameters of the IOL to be implanted into the eye of the current patient to a custom IOL lens fabrication system; and
employing the custom IOL lens fabrication system to fabricate a custom IOL satisfying the at least one of the one or more parameters.

4. The method of claim 1 , further comprising measuring a set of post-surgery values for the plurality of optical properties of the eye of the current patient after implantation of the IOL having the selected one or more parameters into the eye of the current patient.

5. The method of claim 4 , further comprising, after implantation of the IOL having the selected one or more parameters into the eye of the current patient:
including the set of adjusted intended refractive corrections to be applied to the eye of the current patient in the sets of intended refractive corrections to be applied to eyes of previous patients; and
including the set of post-surgery values for the plurality of optical properties of the eye of the current patient in the sets of surgically induced refractive corrections for eyes of previous patients as a result of previous surgeries.

6. The method of claim 1 , wherein the selected one or more parameters of the IOL to be implanted into the eye of the current patient include a dioptic power, a refractive index, an asphericity, a toricity, a haptic angulation and a lens filter.

7. The method of claim 1 , wherein the optical measurement instrument further includes an optical coherence tomographer (OCT), and wherein the method further comprises using the OCT as a ranging system to align the current patient in relation to the optical measurement system while measuring the set of pre-surgery values for the plurality of optical properties of the eye of the current patient.

Assignees

• Amo Wavefront Sciences Llc

Inventors

• Raymond Thomas D
• Neal Daniel R
• Copland Richard J
• Xiong Wei
• Pulaski Paul
• Farrer Stephen W
• Vidal Carmen Canovas
• Hamrick Daniel R

Classifications

• A61F9/008 Primary

  using laser · CPC title

• A61F9/00825

  for photodisruption · CPC title

• A61F2009/00853

  Laser thermal keratoplasty or radial keratotomy · CPC title

• A61F2009/00872

  Cornea · CPC title

• A61F2009/00857

  considering biodynamics · CPC title