Ophthalmic lens element for myopia correction
First Claim
1. An ophthalmic lens element for correcting myopia in a wearer'"'"'s eye, the ophthalmic lens element having a front surface, an optical axis, and an optical centre, the ophthalmic lens element including:
- (a) a central zone providing a first optical correction for substantially correcting myopia associated with the foveal region of the wearer'"'"'s eye, the central zone comprising an area for supporting central vision over an angular range of eye rotation about the optical axis; and
(b) a peripheral zone surrounding the central zone, the peripheral zone providing a second optical correction for substantially correcting myopia or hyperopia associated with a peripheral region of the retina of the wearer'"'"'s eye;
wherein the mean surface power of the peripheral zone at a radius of 20 mm from the optical centre as measured on the front surface is at least +0.50 D relative to the surface power at the optical centre over an azimuthal extent of at least 270 degrees.
2 Assignments
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Accused Products
Abstract
An ophthalmic lens element (100) for correcting myopia in a wearer'"'"'s eye is disclosed. The lens element (100) includes a central zone (102) and a peripheral zone (104). The central zone (102) provides a first optical correction for substantially correcting myopia associated with the foveal region of the wearer'"'"'s eye. The peripheral zone (104) surrounds the central zone (102) and provides a second optical correction for substantially correcting myopia or hyperopia associated with a peripheral region of the retina of the wearer'"'"'s eye. A system and method for dispensing or designing an ophthalmic lens element for correcting myopia in a wearer'"'"'s eye is also disclosed.
59 Citations
40 Claims
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1. An ophthalmic lens element for correcting myopia in a wearer'"'"'s eye, the ophthalmic lens element having a front surface, an optical axis, and an optical centre, the ophthalmic lens element including:
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(a) a central zone providing a first optical correction for substantially correcting myopia associated with the foveal region of the wearer'"'"'s eye, the central zone comprising an area for supporting central vision over an angular range of eye rotation about the optical axis; and (b) a peripheral zone surrounding the central zone, the peripheral zone providing a second optical correction for substantially correcting myopia or hyperopia associated with a peripheral region of the retina of the wearer'"'"'s eye; wherein the mean surface power of the peripheral zone at a radius of 20 mm from the optical centre as measured on the front surface is at least +0.50 D relative to the surface power at the optical centre over an azimuthal extent of at least 270 degrees. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. An ophthalmic lens element for correcting myopia in a wearer'"'"'s eye, the ophthalmic lens element comprising a spectacle lens having a front surface, an optical axis, and an optical centre, the ophthalmic lens element including:
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(a) a central zone providing a first optical correction for substantially correcting myopia associated with the foveal region of the wearer'"'"'s eye, the central zone comprising an area supporting central vision over an angular range of eye rotation about the optical axis; and (b) a peripheral zone surrounding the central zone, the peripheral zone providing a second optical correction for substantially correcting myopia or hyperopia associated with a peripheral region of the retina of the wearer'"'"'s eye;
wherein the first optical correction is specified as a first refracting power and the second optical correction is specified as a second refracting power, and wherein the second refracting power provides a plus power correction relative to the first refracting power, and wherein the refracting power in the central zone is in the range from plano to −
6.00 D.
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32. A method of dispensing or designing an ophthalmic lens element for correcting myopia in a wearer'"'"'s eye, the ophthalmic lens element having a front surface, an optical axis and an optical centre, the method including:
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(a) obtaining, for the wearer; (i) a required value of on-axis optical correction, the on-axis optical correction for correcting myopia associated with the foveal region of the wearer'"'"'s eye; and (ii) a required value of off-axis optical correction, the off-axis optical correction for correcting myopia or hyperopia associated with a peripheral region of the retina of the wearer'"'"'s eye; (b) selecting or designing the ophthalmic lens element according to the values of on-axis and off-axis correction, the ophthalmic lens element including; (i) a central zone providing an optical correction corresponding with the on-axis optical correction, the central zone comprising an area for supporting central vision over an angular range of eye rotation about the optical axis; and (ii) a peripheral zone surrounding the central zone, the peripheral zone providing an optical correction corresponding with the off-axis optical correction, wherein the mean surface power of the peripheral zone at a radius of 20 mm from the optical centre as measured on the front surface is at least +0.50 D relative to the surface power at the optical centre over an azimuthal extent of at least 270 degrees. - View Dependent Claims (33)
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34. A system for dispensing or designing an ophthalmic lens element for correcting myopia in a wearer'"'"'s eye, the ophthalmic lens element having a front surface, an optical axis and an optical centre, the system including:
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(a) an input device for accepting or obtaining optical correction values for a wearer, the optical correction values including; (i) a required value of on-axis optical correction, the on-axis optical correction for correcting myopia associated with the foveal region of the wearer'"'"'s eye; and (ii) a required value of off-axis optical correction, the off-axis optical correction for correcting myopia or hyperopia associated with a peripheral region of the retina of the wearer'"'"'s eye; and (b) a processor for processing the wearer'"'"'s optical correction values to select or design an ophthalmic lens element according to the values of on-axis and off-axis correction, the ophthalmic lens element including; (i) a central zone providing an optical correction corresponding with the on-axis correction, the central zone comprising an area for supporting central vision over an angular range of eye rotation about the optical axis; and (ii) a peripheral zone surrounding the central zone, the peripheral zone providing an optical correction corresponding with the off-axis correction, wherein the mean surface power of the peripheral zone at a radius of 20 mm from the optical centre as measured on the front surface is at least +0.50 D relative to the surface power at the optical centre over an azimuthal extent of at least 270 degrees. - View Dependent Claims (35)
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36. A method of reducing myopia progression in a myope, the method including providing, to a myope, spectacles bearing a pair of ophthalmic lens elements, each lens element for a respective eye, each lens element having a front surface, an optical axis, and an optical centre, each ophthalmic lens element including:
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(a) a central zone providing an optical correction corresponding with on-axis correction for correcting myopia associated with the foveal region of a respective eye, the central zone comprising an area supporting central vision over an angular range of eye rotation about the optical axis; and (b) a peripheral zone surrounding the central zone, the peripheral zone providing an optical correction for correcting myopia or hyperopia associated with the peripheral region of a respective eye, wherein the mean surface power of the peripheral zone at a radius of 20 mm from the optical centre as measured on the front surface is at least +0.50 D relative to the surface power at the optical centre over an azimuthal extent of at least 270 degrees.
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37. An ophthalmic lens element for correcting myopia in a wearer'"'"'s eye, the ophthalmic lens element comprising a spectacle lens having a front surface, an optical axis, and an optical centre, the lens element including:
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(a) a central zone providing a first optical correction for substantially correcting myopia associated with the foveal region of the wearer'"'"'s eye, the first optical correction specified as a first refracting power; and (b) a peripheral zone surrounding the central zone, the peripheral zone providing a second optical correction for substantially correcting myopia or hyperopia associated with a peripheral region of the retina of the wearer'"'"'s eye, the second optical correction specified as a second refracting power; wherein the second refracting power provides a plus power correction relative to the first refracting power, wherein the central zone is sized and shaped to provide the first optical correction over a range of eye-rotations to support central vision throughout an angular range of eye rotations about the optical axis, and wherein the mean surface power of the peripheral zone at a radius of 20 mm from the optical centre as measured on the front surface is at least +0.50 D relative to the surface power at the optical centre over an azimuthal extent of at least 270 degrees.
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38. The use of an ophthalmic lens element to correct myopia in a wearer'"'"'s eye, the ophthalmic lens element comprising a spectacle lens having a front surface, an optical axis, and an optical centre, the lens element including:
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(a) a central zone providing a first optical correction for substantially correcting myopia associated with the foveal region of the wearer'"'"'s eye, the first optical correction specified as a first refracting power; and (b) a peripheral zone surrounding the central zone, the peripheral zone providing a second optical correction for substantially correcting myopia or hyperopia associated with a peripheral region of the retina of the wearer'"'"'s eye, the second optical correction specified as a second refracting power; wherein the second refracting power provides a plus power correction relative to the first refracting power, wherein the central zone is sized and shaped to provide the first optical correction over a range of eye-rotations about the optical axis to support central vision throughout that range, and wherein the mean surface power of the peripheral zone at a radius of 20 mm from the optical centre as measured on the front surface is at least +0.50 D relative to the surface power at the optical centre over an azimuthal extent of at least 270 degrees.
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39. An ophthalmic lens element for correcting or retarding myopia progression in a wearer'"'"'s eye, the ophthalmic lens element having a front surface, an optical axis, and an optical centre, the lens element including:
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(a) a central zone comprising an area for supporting central vision over an angular range of eye rotation about the optical axis; and (b) a peripheral zone surrounding the central zone, the peripheral zone providing, relative to the central zone, a plus power optical correction for substantially correcting myopia or hyperopia associated with a peripheral region of the retina of the wearer'"'"'s eye, wherein the mean surface power of the peripheral zone at a radius of 20 mm from the optical centre as measured on the front surface is at least +0.50 D relative to the surface power at the optical centre over an azimuthal extent of at least 270 degrees.
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40. The use of an ophthalmic lens element to correct or retard myopia progression, the ophthalmic lens element having a front surface, an optical axis and an optical centre, the ophthalmic lens element including:
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(a) a central zone comprising an area for supporting central vision over an angular range of eye rotation about the optical axis; and (b) a peripheral zone surrounding the central zone, the peripheral zone providing, relative to the central zone, a plus power optical correction for substantially correcting myopia or hyperopia associated with a peripheral region of the retina of the wearer'"'"'s eye, wherein the mean surface power of the peripheral zone at a radius of 20 mm from the optical centre as measured on the front surface is at least +0.50 D relative to the surface power at the optical centre over an azimuthal extent of at least 270 degrees.
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Specification