Adjusting the apodization pattern for diffractive iols

Patent metadata

Field	Value
Publication number	US-2017252151-A1
Application number	US-201615059581-A
Country	US
Kind code	A1
Filing date	Mar 3, 2016
Priority date	Mar 3, 2016
Publication date	Sep 7, 2017
Grant date	—

Abstract

An ophthalmic device including an ophthalmic lens having anterior and posterior surfaces and at least one diffraction grating is described. The diffraction grating(s) are on the anterior and/or posterior surface(s). The diffraction grating(s) include zones. A first zone is at a first distance range from a center of the lens. A second zone is at a second distance range further from the center than the first distance range. A repeat zone is at a third distance range further from the center than the second distance range. The first zone includes echelette(s) having a first step height and a first radius of curvature. The second zone includes echelette(s) having a second step height and a second radius of curvature. The repeat zone includes echelette(s) having at least one of the first step height and the first radius of curvature.

First claim

We claim:

1 . An ophthalmic lens comprising:
an anterior surface; a posterior surface; and at least one diffraction grating disposed on at least one of the anterior surface and the posterior surface, the at least one diffraction grating including a plurality of zones corresponding to a plurality of distance ranges from a center of the at least one of the anterior surface and the posterior surface, the plurality of zones including a first zone corresponding to a first distance range, a second zone corresponding to a second distance range further from the center than the first distance range and a repeat zone corresponding to a third distance range further from the center than the second distance range, the first zone including at least a first echelette having a first step height and a first radius of curvature, the second zone including at least a second echelette having a second step height and a second radius of curvature, the repeat zone including at least a third echelette having at least one of the first step height and the first radius of curvature.

2 . The ophthalmic lens of claim 1 wherein the at least the third echelette for the repeat zone has the first step height of the first zone and a third radius of curvature different from the first radius of curvature.

3 . The ophthalmic lens of claim 1 wherein the at least the third echelette for the repeat zone has a third step height different from the first step height and the first radius of curvature.

4 . The ophthalmic lens of claim 1 wherein the at least the third echelette for the repeat zone has the first step height of the first zone and the first radius of curvature of the first zone.

5 . The ophthalmic lens of claim 1 wherein the plurality of zones includes an additional repeat zone having at least a fourth echelette and a fourth distance range further from the center than the third distance range the at least the fourth echelette having at least one of the second step height and the second radius of curvature for the at least the second echelette of the second zone.

6 . The ophthalmic lens of claim 1 wherein the at least one of the anterior surface and the posterior surface has a base curvature.

7 . An ophthalmic device comprising:
an ophthalmic lens having an anterior surface, a posterior surface and at least one diffraction grating disposed on at least one of the anterior surface and the posterior surface, the at least one diffraction grating including a plurality of zones corresponding to a plurality of distance ranges from a center of the at least one of the anterior surface and the posterior surface, the plurality of zones including a first zone corresponding to a first distance range, a second zone corresponding to a second distance range further from the center than the first distance range and a repeat zone corresponding to a third distance range further from the center than the second distance range, the first zone including at least a first echelette having a first step height and a first radius of curvature, the second zone including at least a second echelette having a second step height and a second radius of curvature, the repeat zone including at least a third plurality having at least one of the first step height and the first radius of curvature; and a plurality of haptics coupled with the ophthalmic lens.

8 . The ophthalmic device of claim 7 wherein the at least the third echelette for the repeat zone has the first step height of the first zone and a third radius of curvature different from the first radius of curvature.

9 . The ophthalmic device of claim 7 wherein the at least the third echelette for the repeat zone has a third step height different from the first step height and the first radius of curvature.

10 . The ophthalmic device of claim 7 wherein the at least the third echelette for the repeat zone has the first step height of the first zone and the first radius of curvature of the first zone.

11 . The ophthalmic device of claim 7 wherein the plurality of zones includes an additional repeat zone having at least a fourth echelette and a fourth distance range further from the center than the third distance range the at least the fourth echelette having at least one of the second step height and the second radius of curvature for the at least the second echelette of the second zone.

12 . The ophthalmic device of claim 7 wherein the third distance range is selected based upon a patient's pupil size.

13 . A method for providing an ophthalmic lens comprising:
determining a base curve for at least one of an anterior surface and a posterior surface of the ophthalmic lens; providing at least one diffraction grating disposed on the base curve of the at least one of the anterior surface and the posterior surface, the at least one diffraction grating including a plurality of zones corresponding to a plurality of distance ranges from the center, the plurality of zones including a first zone corresponding to a first distance range, a second zone corresponding to a second distance range further from the center than the first distance range and a repeat zone corresponding to a third distance range further from the center than the second distance range, the first zone including at least a first echelette having a first step height and a first radius of curvature, the second zone including at least a second echelette having a second step height and a second radius of curvature, the repeat zone including at least a third echelette having at least one of the first step height and the first radius of curvature.

14 . A method for treating an ophthalmic condition in a patient having a pupil size, the method comprising:
selecting an ophthalmic device for implantation in an eye of the patient based on the pupil size, the ophthalmic device including an ophthalmic lens having an anterior surface, a posterior surface and at least one diffraction pattern disposed on at least one of the anterior surface and the posterior surface, the at least one diffraction grating including a plurality of zones corresponding to a plurality of distance ranges from a center of the at least one of the anterior surface and the posterior surface, the plurality of zones including a first zone corresponding to a first distance range, a second zone corresponding to a second distance range further from the center than the first distance range and a repeat zone corresponding to a third distance range further from the center than the second distance range, the first zone including at least a first echelette having a first step height and a first radius of curvature, the second zone including at least a second echelette having a second step height and a second radius of curvature, the repeat zone including at least a third echelette having at least one of the first step height and the first radius of curvature; and implanting the ophthalmic device in the eye of the patient.

Assignees

• Novartis Ag

Inventors

• Mackool Richard J

Classifications

• A61F2/1654 Primary

  Diffractive lenses · CPC title

• A61F2/1618

  Multifocal lenses · CPC title

• G02C7/024

  Methods of designing ophthalmic lenses · CPC title

• A61F2002/1683

  having filiform haptics · CPC title

• G02B5/1895

  such optical elements having dioptric power · CPC title