Pseudo-accommodative IOL having multiple diffractive patterns
First Claim
1. A multifocal ophthalmic lens, comprising an optic having a surface comprising at least two different diffractive patterns adapted and disposed relative to one another so as to collectively provide near, intermediate and far vision.
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Accused Products
Abstract
In one aspect, a trifocal ophthalmic lens is disclosed that includes an optic having a surface that comprises at least one trifocal diffractive pattern and at least one bifocal diffractive pattern such that the bifocal pattern provides near and far vision and the trifocal pattern generates near, far, and intermediate vision. For example, the trifocal pattern can provide near, far, and intermediate foci such that the near and far foci are substantially coincident, respectively, with a near and a far focus of the bifocal pattern. In this manner, the trifocal and bifocal patterns collectively provide near, intermediate, and far foci (or focal regions) corresponding, respectively, to the near, intermediate and far vision.
106 Citations
29 Claims
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1. A multifocal ophthalmic lens, comprising
an optic having a surface comprising at least two different diffractive patterns adapted and disposed relative to one another so as to collectively provide near, intermediate and far vision.
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6. A multifocal ophthalmic lens, comprising
an optic having a surface comprising at least one bifocal diffractive pattern and one trifocal diffractive pattern, said bifocal pattern being adapted to provide near and far vision and said trifocal pattern being adapted to provide near, far and intermediate vision.
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19. A trifocal ophthalmic lens, comprising
an optic having at least one surface characterized by a base curve, at least two annular diffractive patterns disposed on said optic, one of said patterns providing primarily three foci and the other providing primarily two foci such that a combination of energy distribution associated with the foci of one pattern with that of the other pattern results in providing near, intermediate and far vision.
- 26. A multifocal ophthalmic lens, comprising an optic having a surface comprising two separate bifocal patterns, said patterns exhibiting different add powers so as to cooperatively provide near, intermediate and far vision.
Specification