Abstract
A haptic combination comprising at least one optical element adapted to provide at least two optical functions including provision of a fixed optical power and provision of variable optical power. The haptic combination comprises at least a first haptic adapted to provide anchoring and positioning of at least one of the optical elements and at least a second haptic adapted to provide transfer of movement from at least one driving means in the eye to at least one of the optical elements. Movement of the second haptic is independent from movement of the first haptic.
Claims
1. An accommodating intraocular lens (IOL) with variable optical power and having an optical axis, the intraocular lens comprising: an anterior optical element and a posterior optical element of which at least one is movable relative to the other in a direction perpendicular to the optical axis, wherein each of the anterior and posterior optical elements have a shape that they exhibit, in combination, different optical powers at different positions of one optical element relative to the other optical element in the plane perpendicular to the optical axis, and a first set of haptics and a second set of haptics, wherein the first set of haptics are positioning haptics comprising sulcus-engaging surfaces adapted to provide anchoring and positioning of the optical elements in an eye and adapted to be directly coupled to the sulcus of the eye, the first set of haptics located an axial distance from the anterior and posterior optical elements, wherein the second set of haptics are haptics for moving comprising ciliary muscle-engaging surfaces adapted and dimensioned to be directly coupled to the ciliary muscle of the eye, the second set of haptics adapted to provide a transfer of movement from the ciliary muscle to at least one of the posterior optical element and the anterior optical element, the second set of haptics connects the anterior optical element and the posterior optical element and extends in a first direction relative to the optical axis in a rest position, wherein the second set of haptics is located a radial distance from the optical elements such that the second set of haptics tilts relative to the optical axis in an accommodated position and mutually shifts the anterior and posterior optical elements in opposite directions relative to each other along a direction perpendicular to the optical axis, wherein the degree of movement of the optical elements depends on the degree of force exerted onto the second set of haptics by the ciliary muscle, wherein movement of the second set of haptics is independent from movement of the first set of haptics, and wherein the second set of haptics is adapted to move at least one of the optical elements in a direction in which is different from the direction in which the first set of haptics positions one of the optical elements, and wherein the first and the second set of haptics are connected by a flexible connection extending in a direction parallel to the optical axis.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) Subsequently the present invention will be elucidated with the help of the accompanying drawings, wherein show:
(2) FIG. 1a: a cross sectional view of a first embodiment of the invention;
(3) FIG. 1b: an axial view of the haptic depicted in FIG. 1a;
(4) FIG. 2a: a cross sectional view of a second embodiment of the invention;
(5) FIG. 2b: an axial view of the haptic depicted in FIG. 2a;
(6) FIG. 3a: a cross sectional view of a third embodiment of the invention;
(7) FIG. 3b: an axial view of the haptic depicted in FIG. 3a;
(8) FIG. 4a: a cross sectional view of a fourth embodiment of the invention;
(9) FIG. 4b: an axial view of the haptic depicted in FIG. 4a;
(10) FIG. 5a: a cross sectional view of a fifth embodiment of the invention in the rest position;
(11) FIG. 5b: a view similar to FIG. 5a in the accommodated position;
(12) FIG. 6a: a cross sectional view of a sixth embodiment of the invention in the rest position;
(13) FIG. 6b: a view similar to FIG. 6a in the accommodated position;
(14) FIG. 7a: a cross sectional view of a seventh embodiment of the invention; and
(15) FIG. 7b: a view similar to FIG. 7a in the accommodated position.
DESCRIPTION OF THE INVENTION
(16) FIGS. 1a and 1b show a lens with haptic combination for positioning in the sulcus. The variable lens schematically positioned in the posterior chamber of the eye behind the iris 1 and the capsular bag 2 from which the natural lens is removed through the capsullorhexis, 3, with central optical axis, 4, comprises, in this example, a combination of at least two optical elements, 5, which, in this particular example, are optical elements in an arrangement such that the elements can be shifted relative to each other in a direction indicated by arrow 6 perpendicular to the optical axis, as in, for example, U.S.20080738127, which example is set forth in FIGS. 1-4, with the note that the inventions are not limited to only such optical arrangements. The haptic combination comprises at least one haptic 7 for focus, coupled to driving means 8 in the eye, in this example the ciliary muscle of the eye, and at least one haptic 9 for position, being connected to the haptic 7 for focus, or, alternatively, connected to any components of the optical elements by a flexible connection, 10, and which haptic for position is coupled to at least one anchoring point in the eye, 11, which anchoring point can be, for example, the sulcus of the eye. Right panel, top view: In this example the haptic for position is a circular loop design haptic in top view, 9, for other components refer to the descriptions above.
(17) FIGS. 2a and 2b show a lens with C-loop haptics for positioning. The variable lens, with central optical axis, 4, comprises, in this example, a combination of at least two optical elements, 5, which can be shifted relative to each other in a direction perpendicular to the optical axis, 6. The haptic combination comprises at least one haptic for focus, 7, and at least one haptic for position, in this example a C-loop type haptic, 12, positioned, in this example, in the sulcus, 11, connected to the haptic for focus, or, alternatively, to any components of the optical elements, with accommodation driven by driving means, 8, in this example, by the ciliary muscle. Right panel, top view: Schematic of lens with C-loops in top view. For explanation of components refer to descriptions above.
(18) FIGS. 3a and 3b depict a lens with multiple haptics for positioning. The variable lens, with central optical axis, 4, comprises, in this example, a combination of at least two optical elements, 5, which can be shifted relative to each other in a direction perpendicular to the optical axis, 6. The haptic combination comprises at least one haptic for focus, 7, and at least two sets of haptics for position, in this example an anterior set of haptics for position, 13, positioned in, for example, the sulcus, 11, and a posterior set, 14, positioned, in this example, at an anchoring point posterior of the ciliary mass, 15, for example in the capsular bag, with all haptics for position connected to the haptic for focus, 7, or, alternatively, to any other component connected to of the optical elements, by flexible connections, 10. Right panel, top view: For explanation of components refer to descriptions above.
(19) FIGS. 4a and 4b show a lens with haptics for positioning embracing the optical elements and the haptics for focus. The variable lens, with central optical axis, 4, comprises, in this example, a combination of at least two optical elements, 5, which can be shifted relative to each other in a direction perpendicular to the optical axis, 6. The haptic combination comprises at least one haptic for focus, 7, and at least one form fitting haptic for position, 16, which embraces, is not connected to, other components of the lens, by the loose form fitting connection, with the haptic for focus being fitted, in this example, with a flange, 17, to achieve such form fitting construction in combination with the haptics for position. Right panel, top view: For explanation of components refer to descriptions above.
(20) FIGS. 5a and 5b show a lens with an optical arrangement similar to the above FIGS. 1-4, but wherein the features of U.S.20080738127 are applied. The variable lens comprises at least two optical elements and with the degree of optical power depending on the degree of movement as represented by reference number 18 of at least one element relative to the other element in a direction perpendicular to the optical axis with FIG. 5a showing the lens in a resting state, resulting in an emmetrope eye and FIG. 5b showing the lens in an accommodated state, with the movement provided by force exerted by driving means on the second haptics. Herein the same reference numbers are used as in FIGS. 1-4.
(21) FIGS. 6a and 6b show a lens with an optical arrangement similar to the above FIGS. 1-4, but wherein features of U.S.2010324673 are applied. The variable lens comprises at least two optical elements and with the degree of optical power depending on the degree of movement, 19, of at least one element relative to the other element in a direction along the optical axis, with FIG. 6a showing the lens in a resting state, resulting in an emmetrope eye and FIG. 6b showing the lens in an accommodated state, with the movement provided by force exerted by driving means on the second haptics. Herein the same reference numbers are used as in FIGS. 1-4.
(22) FIGS. 7a and 7b show a lens with an optical arrangement similar to the above FIGS. 1-4, but wherein features of U.S.2011153015 are applied. The variable lens comprises one optical element 21 and with the degree of optical power depending on the degree of change in shape 20, of said element, with FIG. 7a showing the lens in a resting state, resulting in an emmetrope eye and FIG. 7b showing the lens in an accommodated state, with the change in shape of the optical element 20 provided by force exerted by driving means on the second haptics. Herein the same reference numbers are used as in FIGS. 1-4.
(23) All documents to which the present document refers are included in the present documents by said references. It will be clear that numerous variations can be applied to the embodiments discussed above within the scope of the claims.
