Apparatus, system, and method for intraocular lens power calculation using a regression formula incorporating corneal spherical aberration

Patent metadata

Field	Value
Publication number	US-9393108-B2
Application number	US-201414148420-A
Country	US
Kind code	B2
Filing date	Jan 6, 2014
Priority date	Dec 15, 2010
Publication date	Jul 19, 2016
Grant date	Jul 19, 2016

Abstract

An intraocular lens, and a system and method of providing an intraocular lens, having at least one characteristic of the intraocular lens customized in accordance with a modified regression that includes a modification for corneal spherical aberration. The lens, system and method may indicate measuring at least one biometric parameter of an eye at a desired light level, determining a desired postoperative condition of the eye, obtaining a corneal spherical aberration of the eye, applying at least one empirically derived regression calculation, and predictively estimating, in accordance with an output of the at least one empirically derived regression calculation, the at least one characteristic of the intraocular lens to obtain the desired postoperative condition. The empirically derived regression calculation includes at least a product of the corneal spherical aberration with an empirically derived corneal spherical aberration constant, and a mathematical indication of the at least one biometric parameter or one of the paraxial regression formulas commonly used in clinical practice to calculate IOL power in normal patients.

First claim

What is claimed is:

1. A system for predicting optical power for an intraocular lens to obtain a desired postoperative condition, comprising:
a first device configured to measure at least one biometric parameter of a native eye;
a second device configured to obtain a corneal spherical aberration of the native eye;
at least one computing processor configured to apply a modified regression formula to the at least one biometric parameter and the corneal spherical aberration to determine an optical power; and
an output device configured to output the optical power, wherein the modified regression formula is of the form:
optical power=Regression+constant0*(corneal spherical aberration)
or
optical power=constant1*(biometric parameter)+constant0*(corneal spherical aberration)

wherein constant1 and constant0 comprise an empirically derived factor across other eyes, and wherein the Regression comprises a predicted optical power derived from a classical regression formula.

2. The system of claim 1 , further comprising a feedback input to said computing processor for further modifying the modified regression formula.

3. The system of claim 1 , wherein the at least one biometric parameter is selected from the group consisting of axial length, anterior chamber depth, and corneal power.

4. The system of claim 1 , wherein the optical power includes a refraction power.

5. The system of claim 1 , wherein the Regression comprises one selected from the group consisting of Hoffer Q regression formula, Haigis regression formula, Holladay1 regression formula, Holladay2 regression formula, and SRK/T regression formula.

6. The system of claim 1 , wherein said second device comprises a corneal topographer.

7. The system of claim 6 , wherein said second device is configured to apply a ray tracing algorithm to output from the corneal topographer.

8. The system of claim 1 , wherein the corneal spherical aberration comprises the 12 Zernicke term.

9. A non-transitory computer readable medium for predicting optical power for an intraocular lens to obtain a desired postoperative condition, the computer readable medium having instructions stored thereon, wherein the instructions, when executed by a processor, causes the processor to:
receive at least one biometric parameter associated with measurement of a native eye;
receive data associated with corneal spherical aberration of the native eye;
apply a modified regression formula to the received biometric parameter and the received corneal spherical aberration to determine an optical power; and
output the optical power to a display,
wherein the modified regression formula is of the form:
optical power=Regression+constant0*(corneal spherical aberration)
or
optical power=constant1*(biometric parameter)+constant0*(corneal spherical aberration)

wherein constant1 and constant0 comprise an empirically derived factor across other eyes, and wherein the Regression comprises a predicted optical power derived from a classical regression formula.

10. The computer-readable medium of claim 9 , wherein the instructions, when executed by the processor, further cause the processor to:
receive data from a feedback input to said computing processor; and
modify the modified regression formula using the feedback input.

11. The computer-readable medium of claim 9 , wherein the at least one biometric parameter is selected from the group consisting of axial length, anterior chamber depth, and corneal power.

12. The computer-readable medium of claim 9 , wherein the optical power includes a refraction power.

13. The computer-readable medium of claim 9 , wherein the Regression comprises one selected from the group consisting of Hoffer Q regression formula, Haigis regression formula, Holladay1 regression formula, Holladay2 regression formula, and SRK/T regression formula.

Assignees

• Amo Groningen Bv

Inventors

• Canovas Vidal Carmen
• Artal Pablo

Classifications

• A61F2/1613

  having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus · CPC title

• A61B3/0025 Primary

  characterised by electronic signal processing, e.g. eye models · CPC title

• A61B3/107

  for determining the shape or measuring the curvature of the cornea · CPC title

• A61F2/1637 Primary

  Correcting aberrations caused by inhomogeneities; correcting intrinsic aberrations, e.g. of the cornea, of the surface of the natural lens, aspheric, cylindrical, toric lenses · CPC title

• A61F2240/002

  Designing or making customized prostheses · CPC title