Multifocal lens having a progressive optical power region and a discontinuity
First Claim
1. An ophthalmic lens having a fitting point, comprising:
- a far distance zone;
a mostly spherical power region for providing additive optical power to the far distance zone for providing an intermediate distance zone of the lens;
a discontinuity, as viewed through the lens, located between the far distance zone and said mostly spherical power region;
a progressive optical power region that overlaps as viewed through the lens at least a portion of said mostly spherical power region for providing additive optical power to said mostly spherical power region for providing a near distance zone of the lens, anda plateau of optical power located in a portion of said progressive optical power region for providing vertical stability of vision in said intermediate distance zone;
wherein said plateau of optical power has a vertical length of approximately 1 millimeter to 6 millimeters.
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Abstract
Embodiments of the present invention relate to a multifocal lens having a mostly spherical power region and a progressive optical power region. Embodiments of the present invention provide for the proper alignment and positioning of each of these regions, the amount of optical power provided by each of the regions, the optical design of the progressive optical power region, and the size and shape of each of the regions. The combination of these design parameters allows for an optical design having less unwanted astigmatism and distortion as well as both a wider channel width and a shorter channel length compared to conventional PALs. Embodiments of the present invention may also provide a new, inventive far-intermediate distance zone and may further provide for increased vertical stability of vision within a zone of the lens.
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Citations
89 Claims
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1. An ophthalmic lens having a fitting point, comprising:
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a far distance zone; a mostly spherical power region for providing additive optical power to the far distance zone for providing an intermediate distance zone of the lens; a discontinuity, as viewed through the lens, located between the far distance zone and said mostly spherical power region; a progressive optical power region that overlaps as viewed through the lens at least a portion of said mostly spherical power region for providing additive optical power to said mostly spherical power region for providing a near distance zone of the lens, and a plateau of optical power located in a portion of said progressive optical power region for providing vertical stability of vision in said intermediate distance zone; wherein said plateau of optical power has a vertical length of approximately 1 millimeter to 6 millimeters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An ophthalmic lens having a fitting point, comprising:
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a far distance zone; a mostly spherical power region for providing additive optical power to the far distance zone for providing an upper far-intermediate distance zone of the lens; a discontinuity, as viewed through the lens, located between the far distance zone and said mostly spherical power region; a progressive optical power region that overlaps as viewed through the lens at least a portion of said mostly spherical power region for providing additive optical power to said mostly spherical power region for providing an intermediate distance zone of the lens and a near distance zone of the lens; and a plateau of optical power located in a portion of said progressive optical power region for providing vertical stability of vision in said upper far-intermediate distance zone, wherein said plateau of optical power has a vertical length of approximately 1 millimeter to 6 millimeters. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. An ophthalmic lens having a fitting point, comprising:
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a far distance zone; a mostly spherical power region for providing additive optical power to the far distance zone; a discontinuity, as viewed through the lens, located between the far distance zone and said mostly spherical power region; a progressive optical power region that overlaps as viewed through the lens at least a portion of said mostly spherical power region for providing additive optical power to said mostly spherical power region for providing an intermediate distance zone of the lens and a near distance zone of the lens; and a plateau of optical power located in a portion of said progressive optical power region for providing vertical stability of vision in a zone of the lens, wherein said plateau of optical power has a vertical length of approximately 1 millimeter to 6 millimeters. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. An ophthalmic lens, comprising:
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a far distance zone, an intermediate distance zone, and a near distance zone; a mostly spherical power region for providing additive optical power to the far distance zone; a discontinuity, as viewed through the lens, located between the far distance zone and said mostly spherical power region; a progressive optical power region that overlaps as viewed through the lens at least a portion of said mostly spherical power region, wherein a portion of said progressive optical power region contributes a negative optical power to said mostly spherical power region; and a plateau of optical power located in a portion of the progressive optical power region for providing vertical stability of vision in said intermediate distance zone, wherein said plateau of optical power has a vertical length of approximately 1 millimeter to 6 millimeters. - View Dependent Claims (48, 49, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
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50. An ophthalmic lens, comprising:
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a far distance zone, an upper far-intermediate distance zone, an intermediate distance zone, and a near distance zone; a mostly spherical power region for providing additive optical power to the far distance zone; a discontinuity, as viewed through the lens, located between the far distance zone and said mostly spherical power region; a progressive optical power region that overlaps as viewed through the lens at least a portion of said mostly spherical power region, wherein a portion of said progressive optical power region contributes a negative optical power to said mostly spherical power region; and a plateau of optical power located in a portion of the progressive optical power region for providing vertical stability of vision in an upper far-intermediate distance zone of the lens, wherein said plateau of optical power has a vertical length of approximately 1 millimeter to 6 millimeters. - View Dependent Claims (51, 52, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89)
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64. An ophthalmic lens, comprising:
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a far distance zone, an upper far-intermediate distance zone, an intermediate distance zone, and a near distance zone; a progressive optical power region; and a first plateau of optical power located in a portion of said progressive optical power region for providing vertical stability of vision in the upper far-intermediate distance zone, wherein said first plateau of optical power has a vertical length of approximately 1 millimeter to 6 millimeters. - View Dependent Claims (65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75)
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76. An ophthalmic lens, comprising:
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a far distance zone, an intermediate distance zone, and a near distance zone; a mostly spherical power region for providing additive optical power to the far distance zone; a discontinuity as viewed through the lens between the far distance zone and said mostly spherical power region; a progressive optical power region that overlaps as viewed through the lens at least a portion of said mostly spherical power region spaced apart from and below said discontinuity for providing additive optical power to said mostly spherical power region; and a plateau of optical power located in a portion of the progressive optical power region for providing vertical stability of vision in the intermediate distance zone, wherein said plateau of optical power has a vertical length of approximately 1 millimeter to 6 millimeters. - View Dependent Claims (77, 78)
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Specification