Multifocal ophthalmic lens
First Claim
1. A contact lens, comprising an anterior surface and an opposite posterior surface, wherein at least one of the anterior and posterior surface includes a vertical meridian, a horizontal meridian, and a central optical zone, wherein the central optical zone has a top boundary, a bottom boundary, a distance vision zone and a rotationally-asymmetrical progressive zone adjacent to the distance vision zone, wherein the distance vision zone is located in the upper portion of the central optical zone and provides a distance power for distance vision correction, wherein the rotationally-asymmetrical progressive zone is located in the lower portion of the central optical zone and provides a variable intermediate vision correction and near vision correction.
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Abstract
This invention is generally related to vision corrections by means of multifocal ophthalmic lenses or by means of corneal refractive surgery. In particular, the present invention provides a multifocal contact lens, a multifocal intraocular lens, a method for making a multifocal ophthalmic lens (contact lens and intraocular lens), and a method of correcting presbyopia by reshaping the cornea of an eye.
88 Citations
71 Claims
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1. A contact lens, comprising an anterior surface and an opposite posterior surface, wherein at least one of the anterior and posterior surface includes a vertical meridian, a horizontal meridian, and a central optical zone, wherein the central optical zone has a top boundary, a bottom boundary, a distance vision zone and a rotationally-asymmetrical progressive zone adjacent to the distance vision zone,
wherein the distance vision zone is located in the upper portion of the central optical zone and provides a distance power for distance vision correction, wherein the rotationally-asymmetrical progressive zone is located in the lower portion of the central optical zone and provides a variable intermediate vision correction and near vision correction.
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19. An intraocular lens, comprising a central optical zone, the central optical zone having a first surface and an opposite second surface,
wherein at least one of the first and second surfaces includes a top boundary, a bottom boundary, a vertical meridian, a horizontal meridian, a distance vision zone and a rotationally-asymmetrical progressive zone adjacent to the distance vision zone; -
wherein the distance vision zone is located in the upper portion of the central optical zone and provides a distance power for distance vision correction;
wherein the rotationally-asymmetrical progressive zone is located in the lower portion of the optical zone and provides a variable intermediate vision correction and near vision correction. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method for producing a contact lens capable of correcting presbyopia, comprising the steps of designing the anterior surface and the posterior surface of the contact lens, wherein at least one of the anterior and posterior surface includes a vertical meridian, a horizontal meridian, and a central optical zone,
wherein the central optical zone has a top boundary, a bottom boundary, a distance vision zone and a rotationally-asymmetrical progressive zone adjacent to the distance vision zone; -
wherein the distance vision zone is located in the upper portion of the central optical zone and provides a distance power for distance vision correction;
wherein the rotationally-asymmetrical progressive zone is located in the lower portion of the central optical zone and provides a variable intermediate vision correction and near vision corrections. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. A method for producing an intraocular lens capable of correcting presbyopia, comprising the steps of:
- designing the intraocular lens which comprises a central optical zone, the central optical zone having a first surface and an opposite second surface,
where at least one of the first and second surfaces includes a top boundary, a bottom boundary, a vertical meridian, a horizontal meridian, a distance vision zone and a rotationally-asymmetrical progressive zone adjacent to the distance vision zone;
wherein the distance vision zone is located in the upper portion of the central optical zone and provides a distance power for distance vision correction;
Wherein the rotationally-asymmetrical progressive zone is located in the lower portion of the central optical zone and provides a variable intermediate vision correction and near vision correction. - View Dependent Claims (49, 50, 51, 52, 53, 55, 56, 57, 58, 59)
- designing the intraocular lens which comprises a central optical zone, the central optical zone having a first surface and an opposite second surface,
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54. The method of claim 54, wherein a first line passing through the radial center and the center of curvature at the radial center intersects the optical axis of the lens, wherein the intersection point is within 2 mm or less of the center of curvature at the apex.
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60. A method for correcting presbyopia, comprising the steps of:
- reshaping the central vision area of the cornea of an eye to produce an optical zone, which includes a vertical meridian, a horizontal meridian, a top boundary, a bottom boundary, a distance vision zone and a rotationally-asymmetrical progressive zone adjacent to the distance vision zone,
wherein the distance vision zone is located in the upper portion of the central vision area and provides a distance power for distance vision correction;
wherein the rotationally-asymmetrical progressive zone is located in the lower portion of the central vision area and provides a variable intermediate vision correction and near vision correction;
wherein the rotationally-asymmetrical progressive zone has an upper boundary, a lower boundary, a radial center located in the vertical meridian of the central vision area and below the center of the central vision area; and
wherein the rotationally-asymmetrical progressive zone further has a surface that provides a power profile that increases, along the vertical meridian, from the distance power at the upper boundary to a near power at the radial center, and then remains substantially constant from the radial center to a point near the lower boundary along the vertical meridian. - View Dependent Claims (61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71)
- reshaping the central vision area of the cornea of an eye to produce an optical zone, which includes a vertical meridian, a horizontal meridian, a top boundary, a bottom boundary, a distance vision zone and a rotationally-asymmetrical progressive zone adjacent to the distance vision zone,
Specification