Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS20030050696 A1
Publication typeApplication
Application numberUS 10/242,977
Publication dateMar 13, 2003
Filing dateSep 13, 2002
Priority dateAug 9, 1999
Also published asCA2378621A1, EP1210035A1, EP1210035A4, US6451056, WO2001010354A1
Publication number10242977, 242977, US 2003/0050696 A1, US 2003/050696 A1, US 20030050696 A1, US 20030050696A1, US 2003050696 A1, US 2003050696A1, US-A1-20030050696, US-A1-2003050696, US2003/0050696A1, US2003/050696A1, US20030050696 A1, US20030050696A1, US2003050696 A1, US2003050696A1
InventorsJ. Cumming
Original AssigneeCumming J. Stuart
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Lens for increased depth of focus
US 20030050696 A1
Abstract
An intraocular lens provides substantially increased depth of focus for accurate near and far vision with an optic much thinner than a natural lens, and the lens being rigid vaulted posteriorly and adapted for posterior positioning in the capsular bag. The optic is positioned substantially farther from the cornea than a natural lens, so that a cone of light exiting the optic to impinge upon the retina is much smaller than a cone of light from a natural lens. Typically, the optic may be about 1.0 mm thick and its distance from the cornea 7.0-8.0 mm.
Images(3)
Previous page
Next page
Claims(23)
The inventor claims:
1. An intraocular lens for increased depth of focus, comprising:
an optic having a thickness substantially less than a natural human lens, and
at least two haptics connected with the optic,
said lens being adapted to be posteriorly positioned in the capsular bag of the eye,
whereby light refracted by the cornea travels substantially farther to the optic than with a natural optic and a substantially smaller cone of light passes from the optic to the retina to provide substantially increased depth of focus.
2. A lens according to claim 1, wherein the optic is about 1.0 mm in thickness.
3. A lens according to claim 1, wherein the optic has a thickness between 0.05 mm and 1.5 mm.
4. A lens according to claim 1, wherein the lens is rigid and the haptics are rigidly connected with the optic and extend therefrom.
5. A lens according to claim 1, wherein the lens is configurated to vault posteriorly in the capsular bag of the eye.
6. A lens according to claim 4, wherein the lens is configurated to vault posteriorly in the capsular bag.
7. A lens according to claim 4, wherein the optic has a thickness between 0.50 mm and 1.5 mm.
8. A lens according to claim 5, wherein the optic has a thickness between 0.60 mm and 1.5 mm.
9. A lens according to claim 4, wherein:
the rigid lens is moved anteriorly for near vision and posteriorly for far vision by changes in ciliary muscle configuration during contraction.
10. A lens according to claim 9, wherein:
a peripheral equator of the capsular bag and the rigid lens therein are moved about 1.0 mm between their far and near vision positions, whereby the optic is positioned about 1.0 mm further anteriorly than posteriorly to provide improved near vision.
11. A lens according to claim 9, wherein:
redistribution of ciliary muscle mass upon constriction of the muscle for near vision causes encroachment thereof on the vitreous cavity and an increase of pressure therein to aid in urging the rigid lens anteriorly to enhance near vision.
12. An intraocular lens for increased depth of focus, comprising:
an optic having a thickness substantially less than the thickness of a natural human lens, and
two haptics rigidly connected to the optic and extending therefrom,
said lens being configurated to vault posteriorly in the capsular bag to position the optic farther from the cornea of the eye,
whereby light refracted by the cornea travels substantially farther to the optic than with a natural optic and a substantially smaller cone of light passes from the optic to the retina to provide substantially increased depth of focus.
13. A lens according to claim 12, wherein the optic has a thickness between 0.05 mm and 1.5 mm.
14. A lens according to claim 12, wherein:
the rigid lens is moved anteriorly for near vision and posteriorly for far vision by changes in ciliary muscle configuration during contraction.
15. A lens according to claim 13, wherein:
the rigid lens is moved anteriorly for near vision and posteriorly for far vision by changes in ciliary muscle configuration during contraction.
16. A lens according to claim 14, wherein:
redistribution of ciliary muscle mass upon constriction of the muscle for near vision causes encroachment thereof on the vitreous cavity and an increase of pressure therein to aid in urging the rigid lens anteriorly to enhance near vision.
17. A lens according to claim 14, wherein:
a peripheral equator of the capsular bag and the rigid lens therein are moved about 1.0 mm between their far and near vision positions, whereby the optic is positioned about 1.0 mm further anteriorly than posteriorly to provide improved near vision.
18. A lens according to claim 12, wherein:
a peripheral equator of the capsular bag and the rigid lens therein are moved about 1.0 mm between their far and near vision positions, whereby the optic is positioned about 1.0 mm further anteriorly than posteriorly to provide improved near vision.
19. A lens according to claim 4, and further comprising at least one rigid bar secured to and extending longitudinally of the lens to provide rigidity.
20. A lens according to claim 19, wherein said lens is longitudinally flexible for bending for insertion into an eye.
21. A lens according to claim 12, and further comprising at least one rigid bar secured to and extending longitudinally of the lens to provide rigidity.
22. A lens according to claim 21, wherein said lens is longitudinally flexible for bending for insertion into an eye.
23. A lens according to claim 21, wherein two rigid bars are disposed in spaced relation and extend longitudinally of the lens.
Description
    BACKGROUND AND SUMMARY OF THE INVENTION
  • [0001]
    A natural human optic typically has a thickness of about 5.0 mm. Light rays entering the cornea and passing to the optic typically travel about 7.0 to 8.0 mm. Light rays pass from the optic in a cone of light with its apex at the retina. The natural lens provides only a limited degree of depth of focus with clear vision over a limited range of distances.
  • [0002]
    The present invention provides an optic which is only a fraction the thickness of the natural lens. Whereas the natural lens is about 5.0 mm thick, the lens of the invention may typically be 1.0 mm and may range from about 0.5 mm to 1.5 mm. The distance from the cornea to the optic of the invention is about 7.0-8.0 mm, whereas with a natural lens, the light rays travel only about 3.5 mm from cornea to optic. Light rays refracted by and exiting the optic define a cone of light much smaller in cross-sectional area than the natural lens, and therefore impinge on the retina in a smaller area. The much smaller cone provides greatly increased depth of focus in comparison with a natural lens, and thus enables clear vision over a long range of distances. In effect, the invention provides effective accommodation as between near and far vision, and a person is enabled to view accurately over a wide range of distances. The optic is positioned much farther from the cornea than a natural lens, and this increase of distance minimizes the distance optical power change. The further posterior the optic, the higher the power of the optic and the less movement required for a given power change. The lens according to the invention is rigid, the haptics being rigidly connected to the optic, and the lens is vaulted posteriorly. Thus, the distance between the cornea and the optic is maximized and the distance of travel of light rays between cornea and optic is increased.
  • [0003]
    The rigid lens causes the optic to move with the periphery of the capsular bag in response to ciliary muscle changes, particularly for near vision.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0004]
    [0004]FIG. 1 is a cross-sectional view of a frontal portion of a human eye with a lens according to the invention disposed therein;
  • [0005]
    [0005]FIG. 2 is a partial sectional view of an eye showing light rays entering the cornea and exiting the optic in a cone of light from a natural lens to the retina;
  • [0006]
    [0006]FIG. 3 is a view similar to that of FIG. 2, showing an optic according to the invention, and light rays exiting the optic in a cone of light of smaller size than with the natural lens of FIG. 2;
  • [0007]
    [0007]FIGS. 4 and 5 are sectional views taken respectively at line 4-4 and line 5-5 in FIG. 1, showing a capsular bag and haptic in relation to the ciliary muscle in near and far vision positions of the capsular bag and haptic;
  • [0008]
    [0008]FIG. 6 is a diagrammatic sectional view of the ciliary muscle and capsular bag showing in solid lines their near vision positions, and showing in broken lines their far vision positions;
  • [0009]
    [0009]FIG. 7 is an elevational view of a preferred embodiment of lens and haptic according to the invention;
  • [0010]
    [0010]FIG. 8 is a side elevational view of the lens of FIG. 7;
  • [0011]
    [0011]FIG. 9 is an elevational view of another preferred embodiment of lens according to the invention; and
  • [0012]
    [0012]FIG. 10 is a side elevational view of the lens of FIG. 9.
  • DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • [0013]
    The present invention provides substantially increased depth of focus, for effective near and far accurate vision by providing a thin optic which is only a fraction the thickness of a natural lens or a conventional artificial lens optic, and by providing a rigid lens adapted to be positioned posteriorly in the natural capsular bag.
  • [0014]
    Referring to the drawings, FIG. 1 is a cross-sectional view of an eye 10 with a cornea 12, with a lens 14 according to the invention disposed in the capsular bag 16 of the eye. As indicated in FIG. 2, light rays entering at the cornea are refracted and impact a natural lens 14 which refracts the rays to define a cone of light which impacts the retina. FIG. 3 is a partial sectional view showing a thin optic 18 of the invention disposed substantially farther posteriorly than the natural lens 14 (or a conventional artificial lens) of 5 mm thickness (d2 in FIG. 2). The light rays passing from the cornea to the optic 18 must travel a distance of about 7.0 to 8.0 mm from the cornea to the optic, whereas with the natural lens 14 light rays travel only about 3.5 mm. The light rays refracted by and exiting the optic 18 define a cone of light of much smaller cross-sectional area (FIG. 3A) impact the retina in a smaller area, in comparison with the much larger cone of light and its much larger cross section (FIGS. 2 and 2A). An optic according to the invention may typically be 1.0 mm thick (d1 in FIG. 3), and may range from about 0.5 to about 1.5 mm in thickness.
  • [0015]
    The much smaller cone of light provides greatly increased depth of focus, thus enabling clear vision over a long range of distances, in comparison with the much larger cone of light produced by the natural human lens or conventional artificial intraocular lens. The much improved depth of focus provides effective accommodation or “pseudo accommodation”, as between near and far vision, so that a person is enabled to view accurately over a wide range of distances. The increase of distance which light rays must travel between the cornea and the optic minimizes the distance optical power change—i.e., the further posterior the optic, the higher the power of the optic and the less movement required for significant power change.
  • [0016]
    The lens 14 according to the invention is rigid, with the haptics thereof rigidly connected with the optic. The lens is vaulted posteriorly, as shown in FIGS. 1 and 8, in order to maximize the posterior positioning of the optic to increase the distance of travel of light rays between the cornea and the optic. Additional rigidity may be provided by rigid bars 20 secured along the edges of the lens (FIG. 7) or as shown in FIG. 9, a lens 22 may have rigid bars 24 disposed inwardly of the lens edges with arcuate portions extending about the optic, as shown. The haptics are preferably flexible to enable folding for insertion of the lens into the human eye via a slot therein of relatively short length. Lenses according to the invention may preferably embody upper and lower flexible loop portions 26, 26 (FIG. 7) which extend oppositely to facilitate lens rotation during insertion into an eye, without interfering engagement with the capsular bag.
  • [0017]
    The outer peripheral equator portion of the capsular bag is moved in response to configurational changes in the ciliary muscle as between near and far vision, thereby causing the lens and its optic to move with the periphery of the capsular bag in response to such muscle changes, particularly with respect to near vision. That is, upon contraction of the ciliary muscle, anterior displacement of the capsular bag equator effects corresponding anterior movement of the optic. The lens and optic are free to move anteriorly because of the relative stiffness of the anterior bag resulting from leather-like fibrosis or dead tissue arising from conventional surgical cutting to remove the anterior portion of the bag. The lens is moved posteriorly only when the muscle acts thereon.
  • [0018]
    [0018]FIGS. 4, 5 and 6 are diagrammatic cross-sectional views of the ciliary muscle 28 of the eye in relation to the peripheral or equator portion of the capsular bag with the lens 14 of the invention therein. FIG. 6 shows in broken lines the configuration 30 of the muscle 28 and the relative position of the haptic 14, in a far vision position, and showing in solid lines 32, the muscle configuration 30 and relative position of the haptic for near vision. Muscle configuration indicated at 30 extends into vitreous cavity, thus increasing pressure to a limited degree to further aid in moving the lens anteriorly. Muscle constriction moves the rigid lens forward to a limited degree at the bag periphery, the whole lens moving forwardly.
  • [0019]
    Thus there has been shown and described a lens for increased depth of focus which fulfills all the objects and advantages sought therefor. Many changes, modifications, variations and other uses and applications of the subject invention will, however, become apparent to those skilled in the art after considering this specification together with the accompanying drawings and claims. All such changes, modifications, variations and other uses and applications which do not depart from the spirit and scope of the invention are deemed to be covered by the invention which is limited only by the claims which follow.
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7776088Aug 17, 2010Powervision, Inc.Intraocular lens system and method for power adjustment
US7780729Oct 5, 2004Aug 24, 2010Visiogen, Inc.Intraocular lens
US7871437Dec 21, 2007Jan 18, 2011Amo Groningen B.V.Accommodating intraocular lenses and associated systems, frames, and methods
US7955716Jun 9, 2004Jun 7, 2011Hitachi Chemical Co., Ltd.Metal coordination compound, polymer composition, and organic electroluminescent device employing same
US8008418Jun 18, 2004Aug 30, 2011Hitachi Chemical Co., Ltd.High-molecular copolymer containing metal coordination compound and organic electroluminescence element using the same
US8025823Apr 19, 2006Sep 27, 2011Visiogen, Inc.Single-piece accommodating intraocular lens system
US8048155Feb 3, 2003Nov 1, 2011Powervision, Inc.Intraocular implant devices
US8062361Aug 1, 2005Nov 22, 2011Visiogen, Inc.Accommodating intraocular lens system with aberration-enhanced performance
US8158712Apr 17, 2012Powervision, Inc.Polymeric materials suitable for ophthalmic devices and methods of manufacture
US8182531Jan 14, 2011May 22, 2012Amo Groningen B.V.Accommodating intraocular lenses and associated systems, frames, and methods
US8187325Apr 19, 2006May 29, 2012Visiogen, Inc.Materials for use in accommodating intraocular lens system
US8246679Aug 21, 2012Visiogen, Inc.Intraocular lens
US8303656Sep 4, 2007Nov 6, 2012Powervision, Inc.Adaptive optic lens and method of making
US8314927Nov 20, 2012Powervision, Inc.Systems and methods for testing intraocular lenses
US8328869Dec 11, 2012Powervision, Inc.Accommodating intraocular lenses and methods of use
US8361145Jan 29, 2013Powervision, Inc.Accommodating intraocular lens system having circumferential haptic support and method
US8377123Nov 10, 2004Feb 19, 2013Visiogen, Inc.Method of implanting an intraocular lens
US8425599Apr 23, 2013Powervision, Inc.Accommodating intraocular lenses and methods of use
US8447086Aug 31, 2010May 21, 2013Powervision, Inc.Lens capsule size estimation
US8454688Jun 4, 2013Powervision, Inc.Accommodating intraocular lens having peripherally actuated deflectable surface and method
US8496701May 18, 2012Jul 30, 2013Amo Groningen B.V.Accommodating intraocular lenses and associated systems, frames, and methods
US8668734Jul 11, 2011Mar 11, 2014Powervision, Inc.Intraocular lens delivery devices and methods of use
US8900298Feb 23, 2011Dec 2, 2014Powervision, Inc.Fluid for accommodating intraocular lenses
US8956408Jul 23, 2008Feb 17, 2015Powervision, Inc.Lens delivery system
US8968396Mar 15, 2013Mar 3, 2015Powervision, Inc.Intraocular lens delivery systems and methods of use
US8992609Aug 9, 2010Mar 31, 2015Powervision, Inc.Intraocular lens system and method for power adjustment
US9005283Aug 17, 2012Apr 14, 2015Visiogen Inc.Intraocular lens
US9011532Jul 15, 2013Apr 21, 2015Abbott Medical Optics Inc.Accommodating intraocular lenses
US9039760Oct 2, 2012May 26, 2015Abbott Medical Optics Inc.Pre-stressed haptic for accommodating intraocular lens
US9044317Jan 24, 2014Jun 2, 2015Powervision, Inc.Intraocular lens delivery devices and methods of use
US9198752Jul 7, 2006Dec 1, 2015Abbott Medical Optics Inc.Intraocular lens implant having posterior bendable optic
US9271830Feb 16, 2010Mar 1, 2016Abbott Medical Optics Inc.Accommodating intraocular lens and method of manufacture thereof
US9277987Jul 29, 2011Mar 8, 2016Powervision, Inc.Accommodating intraocular lenses
US20030149480 *Feb 3, 2003Aug 7, 2003Shadduck John H.Intraocular implant devices
US20040190153 *Dec 12, 2003Sep 30, 2004PowervisionLens system and method for power adjustment using externally actuated micropumps
US20050021139 *Oct 7, 2004Jan 27, 2005Shadduck John H.Ophthalmic devices, methods of use and methods of fabrication
US20050267575 *Aug 1, 2005Dec 1, 2005Nguyen Tuan AAccommodating intraocular lens system with aberration-enhanced performance
US20060184244 *Feb 14, 2005Aug 17, 2006Nguyen Tuan ABiasing system for intraocular lens
US20060287498 *Jun 18, 2004Dec 21, 2006Hitachi Chemical Co LtdHigh-molecular copolymer containing metal coordination compound and organic electroluminescence element using the same
US20070010880 *Sep 12, 2006Jan 11, 2007Powervision, Inc.Methods of adjusting the power of an intraocular lens
US20070088433 *Oct 17, 2005Apr 19, 2007PowervisionAccommodating intraocular lens system utilizing direct force transfer from zonules and method of use
US20070100445 *Aug 21, 2006May 3, 2007Shadduck John HIntraocular lenses and business methods
US20070106377 *Dec 27, 2006May 10, 2007Powervision, Inc.Accommodating intraocular lens system having spherical aberration compensation and method
US20070108643 *Apr 19, 2006May 17, 2007Gholam-Reza Zadno-AziziSingle-piece accommodating intraocular lens system
US20070128466 *Jun 9, 2004Jun 7, 2007Hitachi Chemical Co., Ltd.Metal coordination compound, polymer composition, and organic electroluminescent device employing same
US20070203578 *Dec 19, 2006Aug 30, 2007Powervision, Inc.Accommodating intraocular lens system having circumferential haptic support and method
US20070213817 *Mar 6, 2007Sep 13, 2007Victor EschAccommodating intraocular lens having peripherally actuated deflectable surface and method
US20070299487 *Sep 4, 2007Dec 27, 2007Shadduck John HAdaptive Optic Lens and Method of Making
US20080015689 *Jul 24, 2007Jan 17, 2008Victor EschAccommodating Intraocular Lens System and Method
US20080046074 *Aug 23, 2007Feb 21, 2008Smith David JAccommodating Intraocular Lens System Having Spherical Aberration Compensation and Method
US20080046075 *Aug 23, 2007Feb 21, 2008Esch Victor CAccommodating Intraocular Lens System and Method
US20080200982 *Feb 21, 2008Aug 21, 2008Jingjong YourPolymeric Materials Suitable for Ophthalmic Devices and Methods of Manufacture
US20080221676 *Jul 21, 2005Sep 11, 2008Cornell Research Foundation, Inc.Accommodating Intraocular Lens and Methods of Use
US20080306587 *Jul 22, 2008Dec 11, 2008Jingjong YourLens Material and Methods of Curing with UV Light
US20080306588 *Jul 22, 2008Dec 11, 2008Terah Whiting SmileyAccommodating Intraocular Lenses and Methods of Use
US20090005865 *Jul 23, 2008Jan 1, 2009Smiley Terry WPost-Implant Accommodating Lens Modification
US20090149952 *Dec 31, 2008Jun 11, 2009Shadduck John HIntraocular Lenses and Business Methods
US20100131058 *Jan 26, 2010May 27, 2010Shadduck John HIntraocular Lenses and Business Methods
US20100179653 *Jan 11, 2010Jul 15, 2010Claudio ArgentoIntraocular Lenses and Methods of Accounting for Capsule Size Variability and Post-Implant Changes in the Eye
US20100228344 *May 18, 2010Sep 9, 2010Shadduck John HAccommodating Intraocular Lens
US20100324672 *Aug 10, 2010Dec 23, 2010Powervision, Inc.Accommodating Intraocular Lens Having Peripherally Actuated Deflectable Surface and Method
US20100324673 *Aug 23, 2010Dec 23, 2010Visiogen, Inc.Intraocular lens
US20110112638 *May 12, 2011Amo Groningen BvAccommodating intraocular lenses and associated systems, frames, and methods
US20110208301 *Aug 25, 2011David AnvarFluid for Accommodating Intraocular Lenses
Classifications
U.S. Classification623/6.37, 623/6.4
International ClassificationA61F2/16
Cooperative ClassificationA61F2/1629, A61F2002/1699, A61F2002/1689
European ClassificationA61F2/16B4L