WO2006025726A1 - Artificial intraocular lens - Google Patents
Artificial intraocular lens Download PDFInfo
- Publication number
- WO2006025726A1 WO2006025726A1 PCT/NL2004/000613 NL2004000613W WO2006025726A1 WO 2006025726 A1 WO2006025726 A1 WO 2006025726A1 NL 2004000613 W NL2004000613 W NL 2004000613W WO 2006025726 A1 WO2006025726 A1 WO 2006025726A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lens
- elements
- optical axis
- artificial intraocular
- lens elements
- Prior art date
Links
Classifications
-
- 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
- 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
- A61F2/1624—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 having adjustable focus; power activated variable focus means, e.g. mechanically or electrically by the ciliary muscle or from the outside
- A61F2/1632—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 having adjustable focus; power activated variable focus means, e.g. mechanically or electrically by the ciliary muscle or from the outside for changing radial position, i.e. perpendicularly to the visual axis when implanted
-
- 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
- A61F2/1648—Multipart lenses
Definitions
- the invention relates to a new type of artificial intraocular lens.
- the artificial lens is usually implanted in the eye of a patient by surgery, and usually serves as a replacement of the natural lens of the patient. This may be desired, for example, when the natural lens does not function properly, when the natural lens is spoilt, degraded, clouded and/or otherwise negatively affected.
- many different solutions have been proposed for providing a properly functioning intraocular lens, however, none of these solutions has been found sufficiently satisfying.
- the present invention aims to alleviate at least some of the above- mentioned problems.
- An object of the invention is to provide an improved intraocular lens.
- an object of the invention is, to provide an artificial intraocular lens, which can provide relatively good vision and/or large power variations.
- an object of the invention is to provide a properly accommodating intraocular lens.
- an artificial intraocular lens comprising two lens elements, arranged one behind the other along the optical axis of the lens, wherein at least one of the lens elements is movable relative to the other in transversely to the optical axis of the lens, wherein the optical thicknesses of the lens elements are such, that the power of the lens changes by transversal displacement of at least one of the lens elements relative to the other.
- the lens is arranged substantially according to the variable power lens of American patent US 3,305,294.
- the commonly known Alvarez-type lens is applied as an interocular lens.
- the Alvarez lens is considered to be entirely incorporated in the present patent application by reference, particularly for explanation of the commonly known basic principles of the Alvarez lens, but also for providing one or more possibilities of constructing and arranging such an Alvarez lens. Therefore, the description, claims and drawings of US 3,305,294 are considered t ⁇ be part of the present patent application. It is to be noted, that the main concept of the Alvarez lens may extend beyond the basic principles that are laid down in US 3,305,294.
- Alvarez-type lens extraocularly as such , in spectacles, is known, as was proposed by Alvarez 40 years ago in US 3,305,294.
- Alvarez 40 years ago in US 3,305,294.
- optical thicknesses of the two lens elements correspond substantially to those of the elements of the variable power lens of Luis W. Alvarez of the American patent US 3,305,294.
- B, C, D and E are constants that may be given any practical value, including zero
- F(y) is a function that is independent of x and may be zero
- x and y represent coordinates on a rectangular coordinate system centered on the optical axis and lying in a plane perpendicular thereto
- A is a constant representing the rate of lens power variation with lens movement in the x direction.
- the lens comprises means for moving at least one of the lens elements relative to the other in a direction transverse to the optical axis of the lens.
- the lens can be an accommodating intraocular lens, to be actuated by the ciliary muscle of an eye of an user.
- the said means for moving the at least one of the lens elements relative to the other comprise haptics which are arranged to couple said lens elements directly and/or indirectly to the ciliary muscle.
- each of said lens elements has polished surfaces with one of the surfaces being a regular surface of revolution.
- the two lens elements are disposed in closely spaced alignment along the optical axis.
- angles of the lens surfaces with respect to a plane normal to the optical axis are such, that total reflection is avoided during use.
- the optical thickness t of each of said lens elements follows from the solution of the following triad of differential equations:
- the present invention provides an use of an intraocular lens, wherein the lens is implanted in a human eye, wherein preferably the lens accommodates by movement of at least one of the lens elements with respect to the other.
- a method for manufacturing an artificial intraocular lens is characterised in that an Alvarez-type lens is manufactured such, that the lens is implantable in an eye, for instance in a human eye.
- a method for implanting the new artificial intraocular lens into an eye wherein the lens is being positioned with its optical axis extending on the optical axis of the eye, wherein said two lens elements are coupled such to the eye, for instance using haptics, that at least one of the lens elements is transversally moveable relative to the optical axis of the lens.
- fig. 1 a schematic cross-section of a first embodiment of the invention, wherein the lens elements are in a zero-power position
- fig. 2 a similar cross-section as fig. 1 wherein the lens elements are in a negative-power position
- fig. 3 a similar cross-section as fig. 1 wherein the lens elements are in a positive -power position
- fig. 4 a schematic cross-section of a second embodiment of the invention during use, wherein the lens elements are in a first transversal position
- fig. 5 a similar cross-section as fig. 4 wherein the lens elements are in a second transversal position.
- Figures 1-3 schematically show a first embodiment of the present invention, in cross-section.
- the embodiment is an artificial intraocular Alvarez-type lens L.
- the intraocular lens L comprises two lens elements 1, 2, arranged in an optical tandem relation, one behind the other along the optical axis Z of the lens L.
- both of the lens elements 1, 2 are movable relative to the other in a direction transverse to the optical axis Z of the lens L.
- only one of the lens elements can be movable with respect to said optical axis.
- the elements 1, 2 may be made of a suitable optics material, for instance optical glass, transparent plastic and/or any other suitable material.
- the optical thicknesses of the lens elements 1, 2 are such, that the power of the overall lens L changes by transversal displacement of at least one of the lens elements 1, 2 relative to the other.
- the optics of the overall lens L is arranged substantially according to the optics of the Alvarex-lens of American patent US 3,305,294.
- Optical thicknesses of the two lens elements 1, 2 correspond substantially to those of the elements of the variable power lens of Luis W. Alvarez, as described in the American patent US 3,305,294.
- the lens L comprises means for moving at least one, or both, of the lens elements 1, 2 relative to the other in said transverse direction.
- the lens elements 1, 2 are moved by equal amounts in opposite directions during use.
- the means for moving the lens element(s) are not visible in figures 1-3.
- the lens L is to be used as an accommodating intraocular lens, to be actuated by the ciliary muscle of an eye of an user after implantation.
- said means for moving the at least one of the lens elements 1, 2 relative to the other can be provided by a suitable number of haptics which are arranged to couple said lens elements 1, 2 directly or indirectly to the ciliary muscle in a manner, suitable for moving that at least one lens element 1, 2.
- each of said lens elements 1, 2 preferably has polished surfaces with one of the surfaces being a regular surface of revolution.
- the two lens elements 1, 2 are disposed in closely spaced alignment along the optical axis Z, as is clearly visible in figures 1-3.
- Each element has at least one surface of varying curvature with all lens surfaces having all portions thereof inclined at angles less than sixty degrees to a plane perpendicular to said optical axis, to avoid total reflections. Said regular surface of revolution and surface of varying curvature as such are already explained in detail in said US 3,305,294.
- Figure 1 shows a neutral or zero-power transverse position of the two elements 1, 2.
- the total optical thickness of the intraocular lens L is constant. Therefore, in the present embodiment, the lens L will not change the direction of propagation incoming light with respect to the optical axis Z, apart from a very small negligible transveral shift.
- the propagation of light rays is schematically depicted by arrows R in figures 1-3.
- the lens elements 1, 2 of the intraocular lens L have been shifted transversely with respect to the optical axis Z to form a negative power lens.
- the elements 1, 2 have been moved in a reverse direction to form a positive power intraocular lens L.
- the intraocular lens L has a variable focus.
- the amount of change of focus with respect to the amount of movement of the lens elements 1, 2 is directly related to the abovementioned term A in said formula of Alvarez.
- the amount of power variation that can be achieved with the embodiment shown can be relatively large.
- the second embodiment is an intraocular lens L', comprising a first lens element l'and second lens element 2' forming an Alvarex-type lens.
- the optical axis of the second embodiment which axis is depicted in figures 4 and 5 by broken line Z', extends substantially on the optical axis of the eye.
- the lens elements 1', 2' of the second embodiment are coupled indirectly to the ciliary muscle CM of the eye, by haptics 8, 9, the capsular bag CB and zonules ZN.
- the haptics 8, 9 connect the lens elements 1', 2 1 to the capsular bag CB, whereas the capsular bag CB is secured to the ciliary muscle CM by the zonules ZN.
- the haptics 8, 9 are arranged such that the lens elements 1', 2' are transversally moveable relative to said optical axis Z' during use, during contraction and relaxation of the ciliary muscle CM.
- the ciliary muscle CM is in a relaxed state.
- the two lens elements I 1 , 2' have been moved to a first transverse position, such that the lens L' formed by these elements I 1 , 2' has a certain positive optical power.
- the lens L' may provide, for instance, in-focus distant vision, with relatively little aberrations.
- the ciliary musle CM is in a contracted state. Due to the contraction of the ciliary muscle CM, the lens elements 1', 2' have been moved to a second transverse position. In this second position, the positive optical power of the artificial lens L' has increased. Then, the lens L' may provide for near vision, also with relatively little aberrations.
- lens elements 1', 2' can be chosen to provide a suitable optical arrangement and/or shape, such, that the resulting implanted artificial lens L' provides a suitable power variation for allowing a specific user to have both in-focus near vision and in-focus far vision.
- the two lens elements I 1 , 2' can simply be positioned in appropriate transversal positions in the eye, for instance during the implantation of the lens L 1 , for providing sharp in focus vision.
- the new intraocular lens as provided by the present invention may by an Alvarez-type lens, as has been explained in the above, but the lens can also be of different construction while the lens still comprises at least the following features: two lens elements, arranged one behind the other along the optical axis of the lens, wherein at least one of the lens elements is movable relative to the other in a direction transverse to the optical axis of the lens, wherein the optical thicknesses of the lens elements are such, that the power of the lens changes by transversal displacement of at least one of the lens elements relative to the other.
- lens may refer to any one or combination of various types of optical components, as long as optical thicknesses of the components can be such, that the power of the lens changes by transversal displacement of at least one of the optical components relative to the other.
- the artificial lens can be manufactured in various ways using various materials, as will be clear to the skilled person.
- the lens combination may have a wide variety of shapes including planar, elliptical, cylindrical, and spherical.
- one surface of the lens element can for example be a regular surface of revolution, a planar, elliptical, cylindrical, spherical surface or the like surface.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/NL2004/000613 WO2006025726A1 (en) | 2004-09-02 | 2004-09-02 | Artificial intraocular lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/NL2004/000613 WO2006025726A1 (en) | 2004-09-02 | 2004-09-02 | Artificial intraocular lens |
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WO2006025726A1 true WO2006025726A1 (en) | 2006-03-09 |
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PCT/NL2004/000613 WO2006025726A1 (en) | 2004-09-02 | 2004-09-02 | Artificial intraocular lens |
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EP1932492A1 (en) * | 2006-12-13 | 2008-06-18 | Akkolens International B.V. | Accommodating intraocular lens with variable correction |
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WO2009101202A1 (en) * | 2008-02-15 | 2009-08-20 | Amo Regional Holdings | System, ophthalmic lens, and method for extending depth of focus |
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US8231219B2 (en) | 2008-04-24 | 2012-07-31 | Amo Groningen B.V. | Diffractive lens exhibiting enhanced optical performance |
US8343216B2 (en) | 2002-01-14 | 2013-01-01 | Abbott Medical Optics Inc. | Accommodating intraocular lens with outer support structure |
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Cited By (120)
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US8425597B2 (en) | 1999-04-30 | 2013-04-23 | Abbott Medical Optics Inc. | Accommodating intraocular lenses |
US9814570B2 (en) | 1999-04-30 | 2017-11-14 | Abbott Medical Optics Inc. | Ophthalmic lens combinations |
US8343216B2 (en) | 2002-01-14 | 2013-01-01 | Abbott Medical Optics Inc. | Accommodating intraocular lens with outer support structure |
US9504560B2 (en) | 2002-01-14 | 2016-11-29 | Abbott Medical Optics Inc. | Accommodating intraocular lens with outer support structure |
US10206773B2 (en) | 2002-12-05 | 2019-02-19 | Johnson & Johnson Surgical Vision, Inc. | Accommodating intraocular lens and method of manufacture thereof |
US9271830B2 (en) | 2002-12-05 | 2016-03-01 | Abbott Medical Optics Inc. | Accommodating intraocular lens and method of manufacture thereof |
WO2008071760A2 (en) * | 2006-12-13 | 2008-06-19 | Akkolens International B.V. | Accommodating intraocular lens with variable correction |
WO2008071760A3 (en) * | 2006-12-13 | 2008-09-18 | Akkolens Int Bv | Accommodating intraocular lens with variable correction |
JP2010512814A (en) * | 2006-12-13 | 2010-04-30 | アコーレンズ インターナショナル ベースローテン フェンノートシャップ | Intraocular lens with variable correction |
CN101568312B (en) * | 2006-12-13 | 2013-08-21 | 爱克透镜国际公司 | Accommodating intraocular lens with variable correction |
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