Lens for correction of myopic refractive error

Patent metadata

Field	Value
Publication number	US-10247964-B2
Application number	US-201314385028-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Mar 14, 2012
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

An ophthalmic lens element includes an upper distance viewing zone and a lower near viewing zone. The upper distance viewing zone includes a central region with a first refractive power for clear distance vision and peripheral regions that are relatively positive in power compared to the first refractive power. The lower near viewing zone has a central region that is relatively positive in power compared to the first refractive power to account for accommodative lag. The powers of the peripheral regions of the lower near viewing zone are one of: i) equal to the power of the central region of the lower near viewing zone, ii) relatively positive in comparison to the power of the central region of the lower near viewing zone.

First claim

The invention claimed is:

1. An ophthalmic lens for use in front of an eye of a recipient, the ophthalmic lens comprising in an optic zone:
a first region including a distance point corresponding to the expected location through which the optical axis of the eye extends through the ophthalmic lens element when the recipient is looking straight ahead at a distant object;
a second region located laterally to one side of the distance point;
a third region located laterally to the other side of the distance point;
a fourth region located below the first region;
a fifth region located laterally to one side of the fourth region; and
a sixth region located laterally to the other side of the fourth region;
wherein the ophthalmic lens has a first refractive power at the distance point within the first region, a second refractive ADD power in the second region, a third refractive ADD power in the third region, a fourth refractive ADD power in the fourth region, a fifth refractive ADD power in the fifth region, and a sixth refractive ADD power in the sixth region;
wherein the second, third and fourth refractive ADD powers are greater than the first refractive power; and
wherein the fifth and sixth refractive ADD powers are greater than the fourth refractive power and the region five or region six refractive ADD power is less than the region two or region three refractive ADD power; and
wherein the ophthalmic lens is in a configuration such that when the eye moves between looking ahead and downwards the lens remains in a fixed or relatively fixed location and orientation relative to the eye.

2. The lens of claim 1 , wherein each of the first, second, third, fourth, fifth and sixth regions occupy at least one tenth of the area of the optic zone of the ophthalmic lens.

3. The lens of claim 1 , wherein the second and third refractive powers comprise an ADD power relative to the first refractive power of between 0.25 D and 4.0 D inclusive.

4. The lens of claim 3 , wherein the ADD powers of the fifth and sixth regions are half or less than half of the ADD powers of the second and third regions.

5. The lens of claim 1 , wherein the fourth refractive power comprises an ADD power relative to the first refractive power of between 1.0 D to 2.5 D.

6. The lens of claim 1 , wherein:
the second and third refractive powers each comprise an ADD power of at least 2.0 D relative to the first refractive power; and
the ADD powers of the fifth and sixth regions relative to the fourth refractive power are each between 1.00 D and 2.00 D (inclusive) less than the ADD power of the second and third regions relative to the first refractive power respectively.

7. The lens of claim 1 , wherein the second and third refractive powers increase towards convergence with the fifth and sixth refractive powers with increasing field angle.

8. The lens of claim 1 , wherein the first region extends from the distance point towards an upper periphery of the lens and has a substantially uniform refractive power.

9. The lens of claim 8 , wherein the first region includes, at locations above the distance point and above the second and third regions, a refractive power having ADD power relative to the first refractive power.

10. The lens of claim 1 , wherein the first region includes a portion located above the second and third regions.

11. The lens of claim 1 configured to have a power profile that progressively transitions between the refractive power of the first region and the refractive power of the fourth region.

12. The lens of claim 1 configured to have a power profile that progressively transitions between the refractive power of the first region and the refractive power of the second and third regions.

13. The lens of claim 1 , wherein the fourth region has a substantially constant refractive power across its area.

14. The lens of claim 1 , wherein the refractive powers of the fourth, fifth and sixth regions are substantially the same and substantially uniform across the fourth, fifth and sixth regions.

15. The lens of claim 1 , wherein the lens is a spectacle lens.

16. The lens of claim 1 , wherein the lens is a translating contact lens.

17. A method of manufacturing an ophthalmic lens for use in front of an eye comprising:
forming a lens base with an optic zone;
wherein said forming includes shaping the lens to have six regions in the optic zone so that:
a first region includes a distance point located to be substantially aligned with an expected location of an optical axis of the eye during ahead distance vision;
a second region is located laterally to one side of the distance point;
a third region is located laterally to another side of the distance point;
a fourth region is located below the first region;
a fifth region is located laterally to one side of the fourth region; and
a sixth region located laterally to another side of the fourth region;
wherein said forming includes shaping the lens so that each of the six regions has a refractive power so that:
the ophthalmic lens has a first refractive power at the distance point within the first region, a second refractive ADD power in the second region, a third refractive ADD power in the third region, a fourth refractive ADD power in the fourth region, a fifth refractive ADD power in the fifth region, and a sixth refractive ADD power in the sixth region;
the second, third and fourth refractive ADD powers are greater than the first refractive power; and
the fifth and sixth refractive ADD powers are greater than the fourth refractive power and the region five or region six refractive ADD power is less than the region two or region three refractive ADD power.

Assignees

• Brien Holden Vison Inst
• Holden Brien Vision Inst

Inventors

• Sankaridurg Padmaja Rajagopal
• Fedtke Cathleen
• Donovan Leslie Alan
• Smith Iii Earl Leo
• Ho Arthur
• Holden Brien Anthony

Classifications

• G02C7/066 Primary

  Shape, location or size of the viewing zones · CPC title

• G02C7/045

  Sectorial configuration · CPC title

• G02C2202/24

  Myopia progression prevention · CPC title

• G02C7/06 Primary

  bifocal; multifocal {; progressive (G02C7/041 takes precedence)} · CPC title

• G02C7/043

  Translating type · CPC title