US20120140166A1 - Pupil dependent diffractive lens for near, intermediate, and far vision - Google Patents

Pupil dependent diffractive lens for near, intermediate, and far vision Download PDF

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Publication number
US20120140166A1
US20120140166A1 US12/962,255 US96225510A US2012140166A1 US 20120140166 A1 US20120140166 A1 US 20120140166A1 US 96225510 A US96225510 A US 96225510A US 2012140166 A1 US2012140166 A1 US 2012140166A1
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Prior art keywords
echellettes
substantially monofocal
vision correction
lens
monofocal echellettes
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Abandoned
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US12/962,255
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English (en)
Inventor
Huawei Zhao
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Johnson and Johnson Surgical Vision Inc
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Abbott Medical Optics Inc
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Publication date
Priority to US12/962,255 priority Critical patent/US20120140166A1/en
Application filed by Abbott Medical Optics Inc filed Critical Abbott Medical Optics Inc
Assigned to Abbott Medical Optics Inc. reassignment Abbott Medical Optics Inc. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZHAO, HUAWEI
Priority to PCT/US2011/063752 priority patent/WO2012078763A1/fr
Priority to EP11811209.3A priority patent/EP2649487B1/fr
Priority to AU2011338464A priority patent/AU2011338464B2/en
Priority to CA2820881A priority patent/CA2820881C/fr
Publication of US20120140166A1 publication Critical patent/US20120140166A1/en
Priority to US13/919,798 priority patent/US9304329B2/en
Priority to US13/934,575 priority patent/US9069185B2/en
Priority to US15/087,796 priority patent/US10698234B2/en
Priority to US16/915,033 priority patent/US20200326562A1/en
Abandoned legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
    • A61F2/16—Intraocular lenses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
    • A61F2/16—Intraocular lenses
    • A61F2/1613—Intraocular lenses having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus
    • A61F2/1616—Pseudo-accommodative, e.g. multifocal or enabling monovision
    • A61F2/1618—Multifocal lenses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
    • A61F2/16—Intraocular lenses
    • A61F2/1613—Intraocular lenses having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus
    • A61F2/1654—Diffractive lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1876—Diffractive Fresnel lenses; Zone plates; Kinoforms
    • G02B5/189—Structurally combined with optical elements not having diffractive power
    • G02B5/1895—Structurally combined with optical elements not having diffractive power such optical elements having dioptric power
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/04—Contact lenses for the eyes
    • G02C7/041—Contact lenses for the eyes bifocal; multifocal
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/04—Contact lenses for the eyes
    • G02C7/041—Contact lenses for the eyes bifocal; multifocal
    • G02C7/044—Annular configuration, e.g. pupil tuned
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
    • A61F2/16—Intraocular lenses
    • A61F2/1613—Intraocular lenses having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • A61F2230/0006—Rounded shapes, e.g. with rounded corners circular
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
    • G02C2202/20—Diffractive and Fresnel lenses or lens portions
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
    • G02C2202/22—Correction of higher order and chromatic aberrations, wave front measurement and calculation

Definitions

  • the present invention relates to multifocal ophthalmic lenses to correct vision of an eye, such as multifocal intraocular lenses, multifocal contact lenses, and multifocal spectacles.
  • Presbyopia is a condition that affects the accommodation properties of the eye. As objects move closer to a young, properly functioning eye, the effects of ciliary muscle contraction and zonular relaxation allow the lens of the eye to change shape, and thus increase its optical power and ability to focus at near distances. This accommodation can allow the eye to focus and refocus between near and far objects.
  • Cataracts may form in the central nucleus of the lens, in the peripheral cortical portion of the lens, or at the back of the lens. Cataracts can be treated by the replacement of the cloudy natural lens with an artificial lens.
  • An artificial lens replaces the natural lens in the eye, with the artificial lens often being referred to as an intraocular lens (hereinafter “IOL”).
  • a multifocal diffractive profile of the lens can be used to mitigate presbyopia by providing two or more optical powers, for example, one optical power for near vision and one optical power for far vision.
  • These lenses may be in the form of a multifocal contact lens, for example a bifocal contact lens.
  • the lenses may also take the form of an intraocular lens placed within the capsular bag of the eye, replacing the original lens.
  • Depth perception can be an important aspect of vision, and at least some of the prior multifocal lens may provide less depth perception than would be ideal in at least some instances.
  • Intermediate vision correction can be helpful for depth perception and at least some of the prior diffractive optical lenses can provide less than ideal intermediate vision correction in at least some instances.
  • apodization of a diffractive profile providing near and far vision correction has been proposed to provide increased relative amounts of light for far vision correction at larger pupil sizes, this approach can leave intermediate vision substantially uncorrected and result in wavelength dependent light scatter such that depth perception can be less than ideal in at least some instances.
  • Such improved lenses would provide diffractive multifocal lenses having diffractive profiles that improve the distribution of light energy distribution between viewing and non-viewing foci, vary the amount of light energy for near and far vision correction in a controlled manner in response to variation in pupil size, provide intermediate vision correction, decrease chromatic aberration, and decrease light scatter with off axis viewing so as to improve the quality of vision.
  • Embodiments of the present invention provide decreased light scattering and decreased chromatic aberration with a lens comprising a multifocal diffractive structure coupled to a surface of a refractive component, for example imposed on the surface, so as to provide improved patient vision at near and far viewing distances.
  • the lens may comprise a foldable IOL having the diffractive structure imposed on the refractive component on a first side of the IOL.
  • the multifocal diffractive structure may comprise a first plurality of substantially monofocal diffractive echellettes for near vision correction and a second plurality of substantially monofocal echellettes for far vision correction.
  • the substantially monofocal echellettes can diffract transmitted light with an efficiency of at least about 90%.
  • the first plurality of substantially monofocal echellettes for near vision correction can be combined with the second plurality of substantially monofocal echellettes for far vision correction so as to provide a distribution of near and far vision correction across the pupil having decreased light scatter, decreased chromatic aberration, and decreased diffraction to other orders such that dysphotopsia is substantially inhibited.
  • the first plurality of substantially monofocal echellettes for near vision correction and the second plurality of substantially monofocal echellettes for far vision correction can be combined with a third plurality of substantially monofocal echellettes for intermediate vision correction such that near, far and intermediate vision correction can be provided with decreased light scatter, chromatic aberration and diffraction to other orders and dysphotopsia can be substantially inhibited.
  • the first and third plurality of echellettes may comprise a first integer multiple of the design wavelength such as 1 ⁇
  • the second plurality of echellettes may comprise a second integer multiple such as 0 ⁇ .
  • the second plurality of substantially monofocal echellettes and third plurality of substantially monofocal echellettes can correspond to the full period zones of the first plurality of substantially monofocal echellettes
  • the second plurality of substantially monofocal echellettes and third plurality of substantially monofocal echellettes can be arranged at locations corresponding to the first plurality of first full period zones so as to provide a multifocal diffractive lens component composed of substantially monofocal echellettes having a diffraction efficiency of at least about 90% of transmitted light to the near, intermediate and far optical corrections, such that dysphotopsia is inhibited substantially.
  • the third plurality of echellettes may comprise multifocal echellettes, for example bifocal echellettes, combined with the first plurality of substantially monofocal echellettes and the second plurality of substantially monofocal echellettes.
  • the first plurality of substantially monofocal echellettes having the first substantially monofocal optical power can decrease light scatter, chromatic aberration and diffraction to other orders, so as to decrease substantially unwanted light-related visual phenomenon experienced by the patient.
  • the first plurality of substantially monofocal echellettes may comprise a step height corresponding to an integer multiple of a design wavelength, for example within about +/ ⁇ 0.25 ⁇ of the integer multiple, such that at least about 90% of the transmitted light energy is diffracted with an optical power corresponding to the near vision correction.
  • the integer multiple may comprise 1 ⁇ , or 2 ⁇ , or more.
  • the first plurality of substantially monofocal echellettes can be combined with the second plurality of substantially monofocal echellettes in many ways so as to provide a multifocal lens with decreased light scattering and decreased chromatic aberration.
  • an inner portion of the lens may comprise an inner proportion of the first plurality of substantially monofocal echellettes to the second plurality of substantially monofocal echellettes
  • an outer portion of the lens may comprise an outer proportion of the first plurality of substantially monofocal echellettes to the second plurality of substantially monofocal echellettes.
  • the inner proportion can be greater than the outer proportion so as to provide relatively greater amounts of light for the near vision correction with the inner portion and relatively greater amounts of light for the far vision correction with the outer portion.
  • the first plurality of substantially monofocal echellettes may comprise substantially monofocal diffractive shape profiles located on the first portion of full period zones so as to diffract substantially at least about 90% of the light transmitted through the first plurality of echellettes to a diffractive order having an optical power corresponding to near vision correction, and so as to inhibit diffraction to other orders such that scattering and dysphotopsia are inhibited substantially.
  • the substantially monofocal diffractive shape profiles may comprise a height corresponding substantially to an integer multiple of a design wavelength ⁇ such that at least about 90%, for example 95% or more of the visible light transmitted through the first plurality of echellettes is diffracted to the order corresponding to the substantially monofocal near vision correction and so as to inhibit light scattering and diffraction to other adjacent orders.
  • the integer may correspond to a positive diffractive order, for example +1, or +2, or more, such that chromatic aberration is corrected when light scattering from the diffractive structure is inhibited.
  • the chromatic aberration corrected may comprise chromatic aberration from the at least one curved surface of the refractive component of the lens, or one or more components of the eye such as the cornea, the aqueous humor, or the crystalline lens, and combinations thereof.
  • the second plurality of substantially monofocal echellettes can provide the far vision correction.
  • the second plurality of echellettes may comprise a step height that is an integer multiple of the design wavelength, for example to within about +/ ⁇ 0.25 ⁇ , of the integer multiple, such that at least about 90% of the transmitted light energy is diffracted with an optical power corresponding to the far vision correction.
  • the integer multiple may comprise 0 ⁇ , or 1 ⁇ , or more.
  • the radial sizes and locations of the second plurality of echellettes may correspond to the full period zones, such that the second plurality of substantially monofocal echellettes can be located between the first plurality of substantially monofocal echellettes and diffract light for far vision correction.
  • the second plurality of substantially monofocal echellettes may comprise second diffractive shape profiles located on the second portion of the full period zones so as to provide a second optical power corresponding to far vision.
  • the second diffractive profiles may corresponding to an integer multiple of the design wavelength, so as to provide a substantially monofocal far vision correction, such that light scattering, chromatic aberration and dysphotopsia can be inhibited substantially.
  • the integer multiple of the second plurality of echellettes may comprise zero for substantially monofocal far vision correction, such that diffraction to other orders, light scattering, chromatic aberration and dysphotopsia can be inhibited substantially.
  • the diffractive optical component may comprise a plurality of full period zones, and the first plurality of echellettes and the second plurality of echellettes can be arranged in many ways on the plurality of full period zones.
  • the first plurality of substantially monofocal echellettes can be located on a first portion of the plurality of full period zones, and the second plurality of echellettes can be located on a second portion of the plurality of full period zones.
  • Each full period zone may comprises a first half wave zone and a second half wave zone, the second half wave zone having an optical phase substantially opposite the first half wave zone.
  • the third plurality of substantially monofocal echellettes may comprise third diffractive profiles having a substantially monofocal intermediate diffractive optical power for intermediate vision correction located on a third portion of the plurality of full period zones so as to provide increased depth perception at intermediate viewing distances, for example.
  • the third plurality of substantially monofocal echellettes comprising the third diffractive profiles can be configured so as to diffract at least about 90% of the transmitted light to the diffractive order corresponding to the substantially monofocal intermediate vision correction, such that light scatter, chromatic aberration and dysphotopsia from other orders are substantially inhibited and vision improved.
  • the substantially monofocal diffractive shape profile may comprise a height corresponding substantially to an integer multiple of a design wavelength ⁇ such that at least about 90%, for example 95% or more of the visible light transmitted through the third plurality of substantially monofocal echellettes is diffracted to the order corresponding to a substantially monofocal near vision correction and so as to inhibit light scattering and diffraction to other orders.
  • Each of the third plurality of substantially monofocal echellettes may have a width corresponding to a integer multiple of the widths of the first plurality of substantially monofocal echellettes, such as a multiple of two, three, or four, so that that the third plurality of substantially monofocal echellettes can be combined with the first and second plurality of substantially monofocal echellettes at locations across the pupil.
  • the intermediate vision correction may correspond to an amount of optical power within a range from about 0.25 to about 1.5 D of optical power added to the far vision correction, such that visual artifacts such as halos from objects at intermediate distances are decreased when the intermediate vision is provided with the enlarged pupil.
  • the outer portion of the lens may comprise the third plurality of substantially monofocal echellettes having the substantially monofocal intermediate diffractive optical power and the second plurality of substantially monofocal echellettes having the substantially monofocal second diffractive optical power for far vision correction, so as to decrease light scatter, chromatic aberration and diffraction to other orders with the outer portion of the lens.
  • a lens to correct vision of an eye comprises a refractive component comprising at least one curved surface and a multifocal diffractive structure.
  • the multifocal diffractive structure is optically coupled to the at least one curved surface.
  • the multifocal diffractive structure comprises a first plurality of substantially monofocal echellettes having a first optical power corresponding to a near vision correction of the eye and a second plurality of substantially monofocal echellettes having a second optical power corresponding to a far vision correction of the eye.
  • the diffractive structure is imposed on the at least one curved surface.
  • the diffractive structure is imposed on a second component optically coupled to the refractive component.
  • the first plurality of substantially monofocal of echellettes extends substantially around an inner boundary and an outer boundary of each of the substantially monofocal echellettes of the second plurality.
  • the first plurality of substantially monofocal echellettes may comprise a first height corresponding to a non-zero integer multiple of a design wavelength and the second plurality of echellettes may comprise a second step height of about zero.
  • the first plurality of substantially monofocal echellettes may extend substantially along the inner boundary and the outer boundary so as to define each of the second plurality of substantially monofocal echellettes.
  • the first plurality of substantially monofocal echellettes comprises a first plurality of full period zones and the second plurality of substantially monofocal echellettes comprises a second plurality of full period zones corresponding to the first plurality of full period zones.
  • the first plurality of substantially monofocal echellettes and an optical zone size of the diffractive structure may determine an integer number of full period zones, in which the integer number of full period zones comprises the first plurality of full period zones and the second plurality of full period zones.
  • the first plurality of substantially monofocal echellettes can be determined based on the first diffractive optical power, the optical zone size, the design wavelength and a difference of an index of refraction of the eye and an index of refraction of the diffractive structure.
  • the first plurality of substantially monofocal echellettes may comprise first substantially monofocal diffractive profiles extending substantially across the first plurality of full wave zones and the second plurality of substantially monofocal echellettes may comprise second substantially monofocal diffractive profiles extending substantially across the second plurality of full wave zones.
  • the second plurality of full wave zones may have sizes and locations based on the first plurality of full wave zones.
  • the first plurality of substantially monofocal echellettes has height profiles so as to diffract at least about 90% light transmitted energy to a first focus corresponding to the first optical power for near vision correction
  • the second plurality of substantially monofocal echellettes may have height profiles so as to diffract at least about 90% light transmitted energy to a second focus corresponding to the second optical power for near vision correction.
  • the third plurality of substantially monofocal echellettes may have heights approximating heights of the first plurality of substantially monofocal echellettes, and the third plurality of substantially monofocal echellettes may have widths corresponding to an integer multiple of two or more widths of the full period zones of the first plurality of substantially monofocal echellettes.
  • the diffractive structure comprises an inner portion and an outer portion.
  • the inner portion comprises an inner proportion of the first plurality of substantially monofocal echellettes to the second plurality of substantially monofocal echellettes
  • the outer portion comprises an outer proportion of the first plurality of substantially monofocal echellettes to the second plurality of substantially monofocal echellettes.
  • the outer proportion may be less than the inner proportion so as to provide near vision correction with the inner portion and far vision correction with outer portion when the pupil responds to light.
  • the diffractive structure has full wave zones comprising pairs of half period zones.
  • Each of the pairs comprises an inner half period zone having an inner phase and an outer half period zone having an outer phase opposite the inner phase.
  • a third plurality of echellettes may comprise pairs of echellettes, in which each pair has an inner echellette extending substantially across the inner half period zone and an outer echellette extending substantially across the outer half period zone.
  • the pairs of echellettes of the third plurality may correspond to the intermediate vision correction and the far vision correction.
  • the inner echellette of said each pair of the third plurality of echellettes may correspond to the far vision correction and said outer echellette of said each pair of the third plurality of echellettes may correspond to the intermediate vision correction.
  • the inner echellette of said each pair of the third plurality of echellettes may correspond to the intermediate vision correction and said outer echellette of said each pair of the third plurality of echellettes may corresponds to the far vision
  • inventions provide a method of correcting vision of an eye.
  • a lens is placed along an optical path of the eye.
  • the lens comprises at least one curved surface coupled to a diffractive structure.
  • the diffractive structure comprises a first plurality of substantially monofocal echellettes having a first optical power for a near vision correction and a second plurality of substantially monofocal echellettes having a second optical power for a far vision correction.
  • the first plurality of substantially monofocal echellettes diffracts transmitted light with a first efficiency of at least about 90% for the near vision correction and the second plurality of substantially monofocal echellettes diffracts transmitted light with an efficiency of at least about 90% for the far vision correction.
  • the first plurality of substantially monofocal echellettes has a corresponding first plurality of full period zones and second plurality of substantially monofocal echellettes has a second plurality of full period zones corresponding to the first plurality of full period zones.
  • the diffractive structure comprises a third plurality of substantially monofocal echellettes having an intermediate optical power for an intermediate vision correction.
  • the third plurality of substantially monofocal echellettes has third heights approximating first heights of the first plurality of substantially monofocal echellettes.
  • the third plurality of substantially monofocal echellettes has a third plurality of full period zones corresponding to the first plurality of full period zones.
  • the first plurality of full period zones has first widths and the third plurality of full period zones has third widths.
  • the third widths corresponding to an integer multiple of two or more of the first widths, such that first optical power corresponds to the width integer multiple multiplied with the third optical power.
  • FIG. 1A is a cross-sectional view of an eye with an ophthalmic lens comprising multifocal contact lens having a diffractive structure, in accordance with the embodiments of the present invention
  • FIG. 1B is a cross-sectional view of an eye having an ophthalmic lens comprising an implanted multifocal intraocular lens having a bifocal diffractive structure, in accordance with embodiments of the present invention
  • FIG. 1C is a cross-sectional view of an eye having ophthalmic lens comprising an implanted multifocal intraocular lens having a trifocal diffractive structure suitable for incorporation, in accordance with the embodiments of the present invention
  • FIG. 2A is a front view of a multifocal ophthalmic lens in accordance with embodiments of the present invention.
  • FIG. 2B is a cross-sectional view of the lens of FIG. 2A ;
  • FIGS. 3A-3B are graphical representations of a portion of the diffractive profile of a multifocal lens suitable for incorporation in accordance with embodiments as described herein;
  • FIG. 4A shows a portion of diffractive profile comprising a first plurality of substantially monofocal diffractive echellettes for near vision correction and a second plurality of bifocal echellettes for far vision correction and near vision correction, in accordance with embodiments;
  • FIG. 4B shows a portion of a diffractive profile comprising a first plurality of substantially monofocal diffractive echellettes for near vision correction and a second plurality of substantially monofocal diffractive echellettes for far vision correction, in accordance with embodiments;
  • FIG. 4C shows a portion of a diffractive profile comprising the first plurality of echellettes having substantially monofocal diffractive profiles for near vision correction and the second plurality of echellettes having substantially bifocal diffractive profiles for far vision and intermediate vision correction, in accordance with embodiments;
  • FIG. 4D shows a portion of a diffractive profile comprising the first plurality of echellettes having substantially monofocal diffractive profiles for near vision correction and a second plurality of echellettes providing intermediate and far vision correction, in accordance with embodiments;
  • FIG. 5 shows substantially monofocal echellettes suitable for combination so as to provide a diffractive structure in accordance with embodiments.
  • Diffractive structures on ophthalmic lenses as described herein may use a first plurality of substantially monofocal echellettes having first order diffraction with a first optical power for near vision order and a second plurality of substantially monofocal echellettes having zero order diffraction with a second optical power for far vision, such that light scatter can be reduced, for example with a bifocal correction.
  • non-viewing order encompasses a diffractive order containing energy that is not useful in forming an image on the retina of an eye such as at near, intermediate or far viewing distances, for example.
  • multifocal encompasses two or more optical powers to focus light on the retina.
  • a first plurality of substantially monofocal echellettes having an optical power for near vision correction can be combined with a second plurality of substantially monofocal echellettes to provide a multifocal diffractive structure such as a lens
  • light energy transmitted to non-viewing orders can be decreased substantially.
  • the first plurality of substantially monofocal echellettes having the optical power and diffractive order for near vision correction at the design wavelength can be used to determine a plurality of full period zones.
  • a first portion of the plurality of full period zones may comprise the first plurality of the substantially monofocal echellettes for near vision correction, and a second portion of the plurality of full period zones may comprise the second plurality of substantially monofocal for far vision correction, such that the substantially monofocal echellettes can be positioned on the full wave zones to provide pupil dependent diffractive optical power with decreased light scatter.
  • the diffractive structures of the embodiments of the present invention as described herein may also provide additional advantages by enhancing the design flexibility through selectively locating the first echellettes of the first plurality substantially monofocal echellettes and the second echellettes of the second plurality of substantially monofocal echellettes so as to benefit overall viewing performance.
  • arranging the locations of the substantially monofocal near vision echellettes and the substantially monofocal far vision echellettes on the plurality of full period zones can provide a multifocal diffractive structure with at least 90% of light energy transmitted to viewing orders and vary the amount of light energy to near and far vision correction as the pupil size changes.
  • Intermediate vision correction may be provided with a third plurality of substantially monofocal intermediate vision echellettes having an intermediate optical power located in the outer portion of the lens, for example. Varying radially the proportion of the substantially monofocal echellettes corresponding to each of near, far and intermediate vision may thus provide diffractive multifocal structure having separate diffractive full period zones that separately correct each of near, far and intermediate vision, respectively, and which vary the corresponding amount of light energy distributed to each of near, far, and intermediate vision correction over the diffractive structure as the pupil changes in size.
  • the diffractive structure comprises substantially monofocal echellettes
  • the amount of light energy diffracted to the near, far, and intermediate optical powers and corresponding orders may comprise at least 90% of transmitted light energy.
  • FIG. 1A is a cross-sectional view of an eye E fit with an ophthalmic lens 20 comprising a multifocal diffractive contact lens 11 having a multifocal diffractive structure 10 comprising a first plurality of substantially monofocal echellettes for near vision correction and a second plurality of substantially monofocal echellettes for far vision correction.
  • Multifocal diffractive contact lens 11 may, for example, comprise a bifocal contact lens.
  • Multifocal diffractive contact lens 11 covers at least a portion of cornea 12 at the front of eye E and can be centered about the optical axis of eye E.
  • Each major surface of ophthalmic lens 20 such as contact lens 11 , including the anterior (front) surface and posterior (back) surface, generally has a refractive profile.
  • the two surfaces together in relation to the properties of the air, tear film, cornea, and other optical components of the overall optical system, define the optical effects of the lens 11 on the imaging performance by eye E.
  • Conventional, monofocal contact lenses have a refractive power based on the refractive index of the material from which the lens is made, and also on the curvature or shape of the front and rear surfaces or faces of the lens, and can be combined with the multifocal diffractive structure 10 having the substantially monofocal echellettes in accordance with embodiments as described herein.
  • the diffractive structure 10 can be optically coupled to at least one curved surface of lens 11 having the refractive optical power, and the diffractive structure 10 may be imposed on the surface having the refractive power so as to couple the diffractive structure to the at least one curved surface of lens.
  • the multifocal diffractive ophthalmic lens 20 can have a refractive optical power combined with a diffractive optical power.
  • the diffractive optical power can, for example, comprise positive add power, and the add power may be a significant (or even the primary) contributor to the overall optical power of the lens.
  • the diffractive optical power may be provided by a plurality of substantially concentric diffractive echellettes located at zones, in which each echellette may comprise a diffractive profile located at the corresponding zone.
  • the diffractive structure may either be imposed on the anterior surface, or posterior surface, or both.
  • the diffractive structure 10 of the diffractive ophthalmic multifocal lens 20 comprises a first plurality of substantially monofocal echellettes for near vision correction and a second plurality of substantially monofocal echellettes for far vision correction, and can diffract incoming light to two or more diffraction orders.
  • multifocal contact lens 11 and the natural lens 14 bend light 13 to form a far field focus 15 a on retina 16 for viewing for distant objects and a near field focus 15 b for objects close to the eye.
  • the focus on retina 16 the viewing focus, may be near field focus 15 b instead.
  • Far field focus 15 a can correspond with 0 th diffractive order from the second plurality of substantially monofocal echellettes having the second optical power for far vision correction
  • near field focus 15 b can correspond to the 1 st diffractive order from the first plurality of substantially monofocal echellettes having the first optical power for near vision correction.
  • the ophthalmic lens 20 and diffractive structure 10 may comprise many additional types of multifocal ophthalmic lenses such as multifocal intraocular lens (IOL) 18 shown in FIG. 1B .
  • IOL intraocular lens
  • natural lens 14 is removed and IOL 18 is placed within capsular bag 19 in eye E.
  • IOL 18 is centered about the optical axis of the eye E.
  • IOL 18 often has a refractive power and may comprise multifocal diffractive structure 10 having first plurality of substantially monofocal echellettes with a first optical power for near vision and a second plurality of substantially monofocal echellettes with a second optical power for far vision. Similar to contact lens 11 , IOL 18 can focus incoming light 13 to far field focus 15 a with the second optical power and near field focus 15 b with the first optical power.
  • the diffractive structure 10 of diffractive ophthalmic lens 20 comprises a plurality of full period zones 26 that correspond to the locations of the echellettes of lens 20 .
  • the plurality of full period zones may comprise N full period zones, for example up from the first full period zone, 26 - 1 , the second full period zone 26 - 2 , the third full period zone 26 - 3 , the jth full period zone 26 - j , up to the Nth full period zone 26 -N zone.
  • Each of the plurality of full period zones 26 may comprise a first half period zone 26 A and a second half period zone 26 B.
  • the jth full period zone 26 - j comprises a first have period zone 26 A-jth and a second half period zone 26 B-jth.
  • the full period zones of the first diffractive profile may correspond to the full period zones of the second diffractive profile, such that the echellettes of the first profile can be located between echellettes of the second profile.
  • the radial locations of the plurality of full period zones 26 of diffractive structure 10 can be determined based on the first order distance corresponding to the add optical power for near vision correction Da and the design wavelength ⁇ with the relationship
  • the first order distance d is inversely related to the add optical power for near vision correction. For example, when Da is +3 D corresponding to +3 D of optical add power, d equals 0.333.
  • the plurality of full period zones 26 can be determined based on the add optical power Da, such that the widths and locations of the second plurality of echellettes correspond to the first plurality of echellettes and such that the plurality of full period zones 26 comprises the first plurality of full period zones of the first plurality of substantially monofocal echellettes and the full period zones of the second plurality of substantially monofocal echellettes.
  • the optical axis of lens 20 When fitted onto the eye of a subject or patient, the optical axis of lens 20 is generally aligned with the optical axis of eye E.
  • the curvature of lens 20 gives lens 20 an anterior refractive profile and a posterior refractive profile.
  • the diffractive structure 10 may be imposed on either anterior surface 21 , or posterior surface 22 or both.
  • FIG. 2B shows the diffractive structure 10 imposed on the posterior surface 22 .
  • the first plurality of substantially monofocal echellettes 23 A have first substantially monofocal diffractive profiles corresponding to the first substantially monofocal diffractive profile 27 A.
  • the first substantially monofocal diffractive profile 27 A may comprise the first plurality of substantially monofocal echellettes 23 A and a second diffractive profile 27 B may comprise the second plurality of substantially monofocal echellettes 23 B.
  • the first plurality of substantially monofocal echellettes may be located at first full period zone 26 - 1 , third full period zone 26 - 3 , etc., so as to define the first substantially monofocal diffractive profile with the first plurality of substantially monofocal echellettes
  • the second plurality of echellettes may be located at second full period zone 26 - 2 , fourth full period zone 26 - 4 , etc., so as to define the second diffractive profile with the second plurality of substantially monofocal echellettes.
  • the first plurality of substantially monofocal echellettes may comprise a first step height, for example corresponding to an integer multiple K of the design wavelength (K ⁇ ), and the second plurality of substantially monofocal echellettes may comprise a second step height.
  • the first step height may comprise about 1 ⁇ and the second step height may comprise about 0 ⁇ , for example.
  • the first plurality of substantially monofocal echellettes may extend substantially around each of the second plurality of substantially monofocal echellettes so as to define the second plurality of substantially monofocal echellettes, for example when the second plurality of substantially monofocal echellettes comprises a step height of about 0 ⁇ and the first plurality of substantially monofocal echellettes comprises the step height of about 1 ⁇ .
  • Optical zone 30 may have a shape or downward slope that may be linear when plotted against ⁇ as shown in FIG. 3A .
  • optical zone 30 When plotted against radius r, optical zone 30 may have a shape or downward slope that is parabolic as shown in FIG. 3B .
  • the diffractive shape profile comprising the height and slope of optical zone 30 can determine the optical add power of each of profile 27 A and profile 27 B of lens 20 .
  • the first plurality of echellettes 23 A may have a characteristic first step height 32 A defined by the distance between the lowest point and height point of the echellette.
  • the slope (or first derivative) and/or the curvature (second derivative) of the diffractive surface may discontinuous adjacent the transitions.
  • the first plurality of echellettes may correspond to a first integer multiple (K 1 ) of a design wavelength ⁇ , for example 1 ⁇ , so as to provide the near vision optical correction.
  • the second plurality of echellettes may have a second step height 32 B that may be less than the first step height 32 A.
  • the far vision correction provided by the second plurality of echellettes may correspond to a second integer multiple (K 2 ) of the design wavelength ⁇ , for example 0 ⁇ , or a portion of the first integer multiple (K 1 ) such as a fraction of the first integer multiple, e.g. ⁇ /2.
  • the second plurality of echellettes and the second diffractive profile may comprise a substantially monofocal profile.
  • step height 32 A corresponding to ⁇ with a physical step height of ( ⁇ / ⁇ ) will distribute the majority of light energy to the 1 st order, which corresponds to the near field, and will be substantially monofocal.
  • step height of greater than ⁇ /(2 ⁇ ) there will be greater amounts of light energy distributed to the 1 st order than the 0 th order, which corresponds to the far field.
  • light energy is distributed more towards the 0 th order.
  • a step height 32 B of ⁇ /(2 ⁇ ) can be used for the second plurality of echellettes so as to provide a second diffractive profile that is multifocal.
  • light energy at the wavelength ⁇ can be distributed evenly between the 1 st and 0 th orders, for example at least about 40% each.
  • the proportion of the first plurality of monofocal echellettes to the second plurality of multifocal echellettes can be varied radially so as vary the amount of energy light energy having near vision correction and the amount of light energy having far vision correction.
  • FIG. 4A shows a portion of a diffractive profile of diffractive structure 10 comprising the first plurality of echellettes 23 A having substantially monofocal diffractive profiles for near vision correction and a second plurality of echellettes 23 B having substantially bifocal diffractive profiles for far vision correction and near vision correction.
  • the first plurality of echellettes having the first substantially monofocal diffractive profile can diffract at least about 90% of the transmitted polychromatic visible light energy to the near focus, for example at least about 95%, for example at least about 97%, and in some embodiments may diffract 99% or more of the transmitted polychromatic visible light energy.
  • the second plurality of echellettes can diffract at least about 45% of the light energy to the near focus and at least about 45% of the light energy to the far focus.
  • the height of the second plurality of echellettes can be varied so as to diffract more light energy to the far focus and less light energy to the near focus, or less light energy to far and more to near, based on the step height as described above.
  • the multifocal diffractive profile comprising the first plurality of substantially monofocal echellettes and the second plurality of echellettes as shown in FIG. 4A can be well suited for use in the inner portion of the lens corresponding to dimension 20 A as shown above so as to provide the inner portion with a majority amount of light near vision correction and a minority amount of light for far vision correction.
  • FIG. 4B shows a portion of a diffractive profile of diffractive structure 10 comprising the first plurality of substantially monofocal echellettes 23 A having substantially monofocal diffractive profiles for near vision correction and the second plurality of substantially monofocal echellettes 23 B having substantially monofocal diffractive profiles for far vision correction.
  • the second plurality of echellettes can be located at a second portion of full wave zones defined with the first plurality of echellettes so as to diffract light to the 0 th order corresponding to the far vision correction.
  • the second plurality of substantially monofocal echellettes having the second substantially monofocal diffractive profile can diffract at least about 90% of the polychromatic visible light energy to the far focus, for example at least about 95%, for example at least about 97%, and in some embodiments may diffract 99% or more of the polychromatic visible light energy.
  • the multifocal diffractive profile comprising the first plurality of substantially monofocal echellettes for near vision correction and the second plurality of substantially monofocal echellettes far vision correction, for example as shown in FIG. 4B , can be used to provide near and far vision correction with pupil dependent correction having substantially decreased light scatter.
  • the inner portion of the lens corresponding to inner dimension 20 A may comprise a majority of the first plurality of echellettes 23 A having the substantially monofocal near vision correction.
  • the substantially monofocal near vision echellettes may comprise a substantial majority composed of about 75% of the echellettes of the inner portion, and the substantially monofocal far vision echellettes may comprise a minority composed of about 25% of the echellettes of the inner portion, such that the multifocal inner portion is composed of monofocal echellettes.
  • the outer portion of the lens corresponding to outer annular dimension 20 B may comprise a minority of the first plurality of echellettes 23 A having the substantially monofocal near vision correction.
  • the diffractive profile of each echellette comprises a substantially zero height profile along at least about half of the full period zone 26 , such that a substantial amount of light energy is diffracted to the 0 th order.
  • a person of ordinary skill in the art can determine the amount of light energy diffracted to the first and zero orders and determine empirically the step height and size of the portion comprising a height of zero so as to diffract appropriate amounts of light to the first order for intermediate vision correction and far vision correction.
  • the second step height 32 B can correspond to less than ⁇ /2 and comprise a physical step height of less than ⁇ /(2 ⁇ ).
  • FIG. 4D shows a portion of a diffractive profile of diffractive structure 10 comprising the first plurality of echellettes 23 A having substantially monofocal diffractive profiles for near vision correction and a second plurality of echellettes 23 B providing intermediate and far vision correction.
  • each of the plurality of full period zones 26 may comprise a first half period zone 26 A and a second half period zone 26 B.
  • FIG. 4E shows a multifocal diffractive profile 27 of diffractive structure 10 comprising a first plurality of substantially monofocal echellettes, a second plurality of substantially monofocal echellettes, and a third plurality of substantially monofocal echellettes.
  • the first plurality of echellettes 23 A comprises a substantially monofocal diffractive profile 27 A having first step height 32 A corresponding to about 2 ⁇ for near vision correction.
  • the second plurality of echellettes 23 B comprises a substantially monofocal diffractive profile 27 B having step second height 32 B corresponding to about 1 ⁇ for intermediate vision correction.
  • a third plurality of echellettes 23 C comprises substantially monofocal diffractive profile 27 C having a third step height 32 C corresponding to about 0 ⁇ for far vision correction.
  • FIG. 4F shows a multifocal diffractive profile 27 of diffractive structure 10 comprising a first plurality of substantially monofocal diffractive echellettes 23 A, a second plurality of bifocal echellettes 23 B, and a third plurality of substantially monofocal echellettes 23 C.
  • the second plurality of bifocal echellettes 23 B can be apodized toward the periphery of the lens to provide far vision correction near the edge of the lens.
  • the first plurality of echellettes 23 A comprises a substantially monofocal diffractive profile 27 A having step second height 32 A corresponding to about 1 ⁇ for near vision correction.
  • the second plurality of echellettes 23 B comprises a bifocal diffractive profile 27 B having step second height 32 B corresponding to a range from greater than about 0 ⁇ to less than about 1 ⁇ for near and far vision correction, for example within a range from about 1 ⁇ 2 ⁇ to about 3 ⁇ 4 ⁇ .
  • the multifocal diffractive profile comprises a third plurality of substantially monofocal echellettes 23 C having a step height of approximately zero for substantially monofocal far vision correction.
  • the third plurality of substantially monofocal echellettes comprises a third diffractive profile 27 C.
  • the first substantially monofocal diffractive profile 27 A comprising monofocal echellettes 23 A can be combined with the bifocal second diffractive profile 27 B comprising bifocal echellettes 23 B and combined with the substantially monofocal third diffractive profile 27 C comprising monofocal echellettes 23 C so as to provide pupil dependent near and far vision correction with multifocal diffractive profile 27 .
  • the inner portion corresponding to dimension 20 A may comprise the first substantially monofocal echellettes for near vision correction 23 A, and the second plurality of bifocal echellettes 23 B providing about half near vision correction and about half far vision correction, such that the inner portion comprises about 75% near vision correction and about 25% far vision correction.
  • the outer portion corresponding to annular dimension 20 B may comprise about half far vision correction echellettes 23 C and about half bifocal echellettes 23 B, in which the bifocal echellettes are apodized so as to decrease the near vision correction and increase the far vision correction.
  • the correction of the outer portion near the inner portion may comprise about 25% near vision correction and 75% far vision correction varies radially outward away from the inner portion so as to change to about 90% far vision correction and about 10% near vision correction near the periphery.
  • Table I shows a diffractive profile comprising a first plurality of substantially monofocal echellettes and a second plurality of substantially monofocal echellettes that can provide pupil dependent correction with decrease light scatter and chromatic aberration, for example.
  • the full period zones of Da for the near vision correction can be combined in many ways with the echellettes for far and intermediate vision so as to provide a multifocal lens comprising of a first plurality of substantially monofocal echellettes for near vision correction, a second plurality of substantially monofocal echellettes for far vision correction, a third plurality of echellettes for intermediate vision correction, and a fourth plurality of echellettes for another intermediate vision correction.
  • Da 4 D of add power
  • M inverse integer multiple
  • Di is the intermediate optical power and M is the width integer multiple of the substantially monofocal intermediate vision echellette determined based on the widths of the corresponding full period zones of the substantially monofocal near vision correction echellettes.
  • M is the width integer multiple of the substantially monofocal intermediate vision echellette determined based on the widths of the corresponding full period zones of the substantially monofocal near vision correction echellettes.
  • the far vision correction echellettes have a step height of about 0 ⁇ , for example +/ ⁇ 0.25 ⁇ , and are located one or more of the full period zones.
  • Each of the intermediate vision correction echellettes is located so as to correspond to adjacent full period zones of echellettes of Da and has a width corresponding to the integer multiple M.
  • each of the Da/2 echellettes has an optical power of Da/2 and a width of corresponding 2 of the adjacent full period zones of Da.
  • Tables similar to Table II can be generated for many amounts of near, far and intermediate vision correction.
  • Similar results can be obtained with odd integers such as Da/3 corresponding to three full period zones and an optical power of Da/3, for example 1D when the add power for near vision correction is 3 D.
  • Table III shows a multifocal diffractive profile comprising a first plurality of substantially monofocal echellettes having a first optical power for near vision correction, a second plurality of substantially monofocal echellettes having a second optical power for far vision correction, a third plurality of substantially monofocal echellettes having a third optical power for intermediate vision correction, and a fourth plurality of substantially monofocal echellettes having a fourth optical power for intermediate vision correaction less than the third optical power, so as to provide pupil dependent near, far and intermediate vision correction with decreased light scatter and chromatic aberration.
  • the height of the first plurality of substantially monofocal echellettes and the third plurality of substantially monofocal echellettes is about 1 ⁇ , and the width of the third plurality of substantially monofocal echellettes corresponds to about twice the width of the first plurality.
  • the height of the first plurality of substantially monofocal echellettes and the fourth plurality of substantially monofocal echellettes is about 1 ⁇ , and the width of the fourth plurality of substantially monofocal echellettes corresponds to about four times the width of the first plurality.
  • FIG. 5 shows a substantially monofocal echellettes 23 suitable for combination so as to provide diffractive structure 10 in accordance with Table III.
  • the diffractive structure 10 may comprise many combinations of the first through fifth plurality of echellettes located on the plurality of full period zones 26 so as to provide diffraction of at least about 90% to the viewing orders, for example 95% of the transmitted light energy to the viewing orders.
  • the substantially monofocal echellettes may comprise smooth profiles having transition zones as described herein.
  • the heights of the substantially monofocal echellettes corresponding to the integer multiple K of the design wavelength can be within about +/ ⁇ 0.25 ⁇ , for example within about +/ ⁇ 0.1 ⁇ , so as to achieve the transmission of at least about 90%, for example at least about 95%.
  • the diffraction efficiencies as described herein were calculated using MATHCAD, available from Parametric Technology Corporation of Needham, Mass.
  • the wavelength analyzed was about 500 nm, which is sufficiently far from the design wavelength of about 550 nm so as to correspond substantially to the diffraction of polychromatic substantially white light.
  • the profile geometries shown in the aforementioned figures may not be drawn exactly to scale.
  • the heights of the diffractive profiles shown in the figures can generally in the order of about 0.5 millimeters and about 2.0 millimeters although the heights may vary depending on factors such as the amount of correction helpful to the patient, the refractive index of the lens material and surrounding medium, and the desired distribution of light between useful diffraction orders.

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US12/962,255 US20120140166A1 (en) 2010-12-07 2010-12-07 Pupil dependent diffractive lens for near, intermediate, and far vision
PCT/US2011/063752 WO2012078763A1 (fr) 2010-12-07 2011-12-07 Lentille diffractive dépendante de la pupille pour vision de près, intermédiaire ou de loin
EP11811209.3A EP2649487B1 (fr) 2010-12-07 2011-12-07 Lentille diffractive dépendante de la pupille pour vision de près, intermédiaire ou de loin
AU2011338464A AU2011338464B2 (en) 2010-12-07 2011-12-07 Pupil dependent diffractive lens for near, intermediate, and far vision
CA2820881A CA2820881C (fr) 2010-12-07 2011-12-07 Lentille diffractive dependante de la pupille pour vision de pres, intermediaire ou de loin
US13/919,798 US9304329B2 (en) 2010-12-07 2013-06-17 Pupil dependent diffractive lens for near, intermediate, and far vision
US13/934,575 US9069185B2 (en) 2010-12-07 2013-07-03 High efficiency optic
US15/087,796 US10698234B2 (en) 2010-12-07 2016-03-31 Pupil dependent diffractive lens for near, intermediate, and far vision
US16/915,033 US20200326562A1 (en) 2010-12-07 2020-06-29 Pupil dependent diffractive lens for near, intermediate, and far vision

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US13/919,798 Active 2031-05-25 US9304329B2 (en) 2010-12-07 2013-06-17 Pupil dependent diffractive lens for near, intermediate, and far vision
US15/087,796 Active 2032-01-11 US10698234B2 (en) 2010-12-07 2016-03-31 Pupil dependent diffractive lens for near, intermediate, and far vision
US16/915,033 Pending US20200326562A1 (en) 2010-12-07 2020-06-29 Pupil dependent diffractive lens for near, intermediate, and far vision

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US15/087,796 Active 2032-01-11 US10698234B2 (en) 2010-12-07 2016-03-31 Pupil dependent diffractive lens for near, intermediate, and far vision
US16/915,033 Pending US20200326562A1 (en) 2010-12-07 2020-06-29 Pupil dependent diffractive lens for near, intermediate, and far vision

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US20130278891A1 (en) 2013-10-24
EP2649487A1 (fr) 2013-10-16
US10698234B2 (en) 2020-06-30
CA2820881C (fr) 2019-02-12
US9304329B2 (en) 2016-04-05
CA2820881A1 (fr) 2012-06-14
AU2011338464A1 (en) 2013-07-04
WO2012078763A1 (fr) 2012-06-14
US20160216535A1 (en) 2016-07-28
AU2011338464B2 (en) 2015-09-24
EP2649487B1 (fr) 2017-11-22

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