Intraocular lens having a haptic structure with a streamlined cross-sectional shape

Abstract

To provide an improved IOL capable of addressing PCO while allowing the IOL to be repositioned and taken out of the body.SOLUTION: An ophthalmic device 100A includes an optical component 110 and a haptic structure 120A coupled with the optical component. The optical component includes an optic axis. The haptic structure is coupled to the optical component. The haptic structure retains the ophthalmic device within a capsular bag of a patient's eye. At least a portion of the haptic structure has a cross-section and a peripheral surface 128A forming an outer periphery of a portion of the cross-section. At least a portion of the peripheral surface contacts the capsular bag and is smoothly curved.SELECTED DRAWING: Figure 1A-1D

Description

[Technical field]

[0001] The present disclosure relates generally to ophthalmic lenses, and more particularly to intraocular lenses having haptic structures with streamlined cross-sectional shapes. [Background technology]

[0002] Intraocular lenses (IOLs) may be implanted in a patient's eye to replace the patient's natural crystalline lens. IOLs generally include (1) an optic that corrects the patient's vision (e.g., typically by refraction or diffraction) and (2) haptics that constitute a support structure that holds the optic in place within the patient's eye (e.g., within the capsular bag). Generally, a physician selects an IOL whose optic has the corrective properties appropriate for the patient. During ophthalmic surgery, often performed for conditions such as cataracts, a surgeon implants the selected IOL by making an incision in the capsular bag of the patient's eye (capsulotomy) and inserting the IOL through the incision. Generally, the IOL is folded for insertion into the capsular bag via an incision in the cornea and unfolded once in place within the capsular bag. During unfolding, the haptics may expand so that each small section rests against the capsular bag, holding the IOL in place.

[0003] In some cases, the IOL needs to be removed, i.e., explanted. To remove the IOL, it is cut into pieces and removed through an incision. The IOL may also be repositioned during the surgical procedure after the haptics have been expanded. In either removing or repositioning the IOL, the haptics are moved away from the capsule. However, because the haptics may be attached to the capsule, movement of the haptics may damage or tear the capsule. Such injury to the patient is undesirable.

[0004] Even when the IOL stays in place, there may be drawbacks. The IOL may cause striae or folding in the posterior capsular bag. Striae in the capsular bag may cause posterior capsular opacification (PCO) by providing a mechanism for cellular proliferation and / or migration. Therefore, mechanisms to address PCO are desirable. Summary of the Invention [Problem to be solved by the invention]

[0005] Thus, there is a need for improved IOLs that can address PCO while still allowing for repositioning and removal of the IOL outside the body. [Means for solving the problem]

[0006] In some embodiments, an ophthalmic device includes an optic and a haptic structure coupled to the optic. The optic includes an optical axis. The haptic structure is coupled to the optic. The haptic structure retains the ophthalmic device within a capsular bag of a patient's eye. At least a portion of the haptic structure has a cross-section and a periphery that forms an outer periphery of a portion of the cross-section. At least a portion of the periphery contacts the capsular bag and is smoothly curved.

[0007] In some embodiments, the haptic features described herein may have one or more technical advantages, such as, for example, an IOL having a haptic feature described herein may be more easily removed and / or repositioned outside the body compared to existing IOLs.

[0008] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference characters indicate like features and in which: [Brief description of the drawings]

[0009] [Fig. 1A-1J]1 illustrates various views of an exemplary embodiment of an ophthalmic device having haptic structures with a periphery that is streamlined in cross section. [Figure 2A-2B] 1 illustrates another exemplary embodiment of a portion of an Ophthalmic Device having a haptic structure with a periphery that is streamlined in cross section. [Figure 3A-3B] 1 illustrates another exemplary embodiment of a portion of an Ophthalmic Device having a haptic structure with a periphery that is streamlined in cross section. [Figure 4A-4B] 1 illustrates another exemplary embodiment of a portion of an Ophthalmic Device having a haptic structure with a periphery that is streamlined in cross section. [Diagram 5] 1 illustrates another exemplary embodiment of a portion of an Ophthalmic Device having a haptic structure with a periphery that is streamlined in cross section. [Figure 6] 1 illustrates another exemplary embodiment of a portion of an Ophthalmic Device having a haptic structure with a periphery that is streamlined in cross section. [Figure 7] 1 illustrates another exemplary embodiment of a portion of an Ophthalmic Device having a haptic structure with a periphery that is streamlined in cross section. [Figure 8] 1 illustrates another exemplary embodiment of a portion of an Ophthalmic Device having a haptic structure with a periphery that is streamlined in cross section. [Figure 9] 1 illustrates another exemplary embodiment of a portion of an Ophthalmic Device having a haptic structure with a periphery that is streamlined in cross section. [Figure 10] 1 illustrates another exemplary embodiment of a portion of an Ophthalmic Device having a haptic structure with a periphery that is streamlined in cross section. [Figures 11A-11C] 13A-13C show exemplary embodiments of textures / patterns that may be used in haptic structures having a perimeter with a streamlined cross section. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Those skilled in the art will appreciate that the drawings described below are for illustrative purposes only and are not intended to limit the scope of Applicant's disclosure in any way.

[0011] Exemplary embodiments relate to ophthalmic devices, such as intraocular lenses (IOLs). The following description is provided to enable one of ordinary skill in the art to make and use the invention, and is provided in the context of a patent application and its terms. Various modifications to the exemplary embodiments, as well as the general principles and features described herein, will be readily apparent. Phrases such as "exemplary embodiment," "one embodiment," and "another embodiment" may refer to the same or different embodiments and to multiple embodiments. The embodiments are described in terms of systems and / or devices having certain components. However, the systems and / or devices may include more or fewer components than those shown, and variations in the arrangement and type of components may be made without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features described herein.

[0012] In general, the present disclosure relates to an ophthalmic device including an optic and a haptic structure coupled to the optic. The optic includes an optical axis. The haptic structure is coupled to the optic. The haptic structure retains the ophthalmic device within a capsular bag of a patient's eye. At least a portion of the haptic structure has a cross-section and a periphery that forms an outer periphery of a portion of the cross-section. At least a portion of the periphery contacts the capsular bag and is smoothly curved.

[0013] 1A-1G show various views of an exemplary embodiment of an ophthalmic device 100A having a closed-loop haptic structure 120A with a streamlined perimeter in cross section. As described below, in other embodiments, an open-loop haptic structure may be used. For simplicity, the ophthalmic device 100A may be referred to as an IOL 100A. For clarity, FIGS. 1A-1G are not to scale and not all components may be shown. The IOL 100A includes a haptic structure 120A and an optic 110. FIGS. 1A and 1B are plan and side views of the IOL 100A. FIG. 1C is a cross-sectional view of a portion of the haptic structure 120A. FIG. 1D is a cross-sectional view of the portion of the haptic structure 120A when in use with a patient's eye. FIG. 1E is a plan view of the IOL 100A when being manipulated. FIG. 1F is a cross-sectional view of a portion of the haptic structure 120A when being manipulated. FIG. 1G illustrates the forces associated with manipulating haptic structure 120A.

[0014] The optic 110 is an ophthalmic lens 110 that may be used to correct a patient's vision. For example, the optic may be a refractive and / or diffractive lens. The optic 110 may be a monofocal lens, a multifocal lens, a toric lens, an accommodative lens, or another similar lens. Thus, the front and / or back surface of the optic 110 may have features including, but not limited to, a base curvature and one or more diffraction gratings. The optic 110 may refract and / or diffract light to correct the patient's vision. The optic 110 has an optical axis 112 that exits the plane of the paper in FIG. 1A. The optic 110 is shown in plan view in FIG. 1A as having a circular footprint. In other embodiments, the optic 110 may have a footprint of a different shape. In some embodiments, the optic 110 may also include other features not shown for clarity. The optic 110 may be formed of one or more of a variety of flexible optical materials. For example, the optical component 110 may include, but is not limited to, one or more of silicone, hydrogel, and acrylic (eg, AcrySof®).

[0015] The haptic structure 120A is a support structure used to keep the ophthalmic device 100A in place within the capsular bag (not explicitly shown in FIGS. 1A-1C and 1E) of the patient's eye. A portion of the capsular bag 130A is shown in FIG. 1D. The haptic structure 120A includes closed loops 122A-1 and 122A-2 (collectively 122) and an inner ring or frame 124A. It is desirable for the inner portion of the frame 124A to conform to the shape of the optic 110. In other embodiments, the frame 124A may be omitted. In some embodiments, the haptic structure 120A and the optic 110 may be molded together. Thus, the optic 110 and the haptics 120A may form a single monolithic structure. In other embodiments, the haptic structure 120A may be attached to the optic 110 in other ways. For example, the haptic structure 120A may be bonded to or molded around the existing optic 110.

[0016] The loops 122A hold the IOL 100A in place in the patient's eye by resting against the capsule 130A. Each of the loops 122A subtends a large angle. Therefore, the loops 122A contact the capsule over a much larger angle than haptics with open loops. As a result, stability may be increased and streaking may be reduced. Although two closed loops 122A are shown, another number of loops may be used. The shape of the closed loops 122A may be different. Additionally, in other embodiments, open loops may be used rather than closed loops. For example, Figures 1H and 1J show IOLs 100A' and 100A" that are similar to IOL 100A. Figure 1H shows IOL 100A' with C-shaped open loops 122A-1' and 122A-2' (collectively loops 122A'). Figure 1J shows IOL 100A" with L-shaped open loops 122A-1" and 122A-2". Thus, IOLs 100A' and 100A" may be the same as IOL 100A, except that loops 122A' and 122A" are open. For example, the cross-sections of open loops 122A' and 122A" may be the same as the cross-section of closed loop 122A.

[0017] 1C and 1D show cross sections of closed loop 122A, for example taken along line AA shown in FIG. 1A. Although FIG. 1A shows a particular location of the cross section, in other embodiments, the cross section may be the same in another portion of closed loop 122A-1 and / or for at least a portion of the other closed loop 122A-2. The cross sections shown in FIGS. 1C-1D are for at least a portion of one or more loops 122A that rest against the capsular bag. In some embodiments, an entire cross section of each loop 122A is shown. In other embodiments, portions of loops 122A that do not rest against capsular bag 130A, such as near frame 124A, may have a different cross section.

[0018] The cross section of one or more loops 122A has an inner circumferential surface 126A and an outer circumferential surface 128A. The outer circumferential surface 128A is on the outside of the loop 122A and may rest against the capsule 130A as shown in FIG. 1D. The outer circumferential surface 128A exerts a force on the capsule 130A. Thus, the outer circumferential surface may help expand the capsule 130A and stabilize the IOL 100A within the capsule 130A. The inner circumferential surface 126A faces the outer circumferential surface 128A and forms the inside of the loop 122A. Thus, at least a portion of the inner circumferential surface 126A may not contact the capsule or may exert a significantly reduced force on the capsule. If arms, rather than loops, are present in the haptic structure 120A, the inner circumferential surface forms the portion of the cross section that does not rest against the capsule.

[0019] In different embodiments, the particular shape of the cross section may be different even when the overall shape does not change. For example, in different embodiments, the length between the corner 129A of the inner periphery 126A and the outer periphery 128A, and the thickness between the rear face and the front face may be different. In some embodiments, the thickness may be on the order of 0.5 mm. In some such embodiments, the length may be about 0.9 mm. In other such embodiments, the length may be about 0.7 mm. Thus, the cross section of the haptic 120A may have different appearances for different aspect ratios.

[0020] At least a portion of the outer peripheral surface 128A is smoothly curved. In the illustrated embodiment, the entire outer peripheral surface 128A is curved. In other words, the cross-sectional geometry of the outer peripheral surface 128A is streamlined. Therefore, macroscopically, the outer peripheral surface 128A has a continuous and well-defined slope. In the embodiment shown in FIGS. 1A-1D, the outer peripheral surface is free of additional textures or features. The textures may have characteristic lengths on the order of nanometers to microns or less. The features may have characteristic or characteristic lengths on the order of tens of microns. In other embodiments, such textures or features may be present. However, depending on the scale of the cross-sectional diameter or height, the outer peripheral surface 128A is smoothly curved. Due to its curved shape, the outer peripheral surface 128A may come into better contact with the lens capsule 130A. This is shown in FIG. 1D. As a result, the haptics 120A may be able to better stabilize the IOL 100A. Additionally, having curved and no sharp corners on outer periphery 128A may reduce the likelihood that loop 122A will adhere to and tear capsule 130A when removed or repositioned outside the body.

[0021] For example, FIG. 1E and FIG. 1F show the operation force F man FIG. 1G shows a plan view of the forces involved in repositioning or removing the IOL 100A from the body. man is used to move the haptics away from the capsule 130A. In response to the manipulation force, the loop 122A-1 is deformed as shown in FIG. 1E. More specifically, the portion of the loop 122A-1 to which the manipulation force is applied moves in the direction of the force: towards the optic 110. The reaction force F resulting from the manipulation force is reaction 1 and F reaction1G, the reaction force τ tends to separate loop 122A-1 from the capsule. In addition, loop 122A-1 is also subjected to a torque τ, which also tends to separate loop 122A-1 from capsule 130A. The cross-sectional configuration of loop 122A therefore tends to enhance the mobility of loop 122A relative to capsule 130A when loop 122A is being manipulated.

[0022] In contrast to the outer peripheral surface 128A, the inner peripheral surface may not be smoothly curved. In the illustrated embodiment, the inner peripheral surface 126A has a sharp corner 129A. Macroscopically, the slope of the inner peripheral surface 126A is not pronounced at the corner 129A and is not continuous on both sides of the corner 129A. Therefore, the cross section of the haptic structure 120A is made teardrop shaped. Due to the presence of the sharp corner 129A, the optic 110 may be surrounded by sharp edges on all sides. These sharp edges may also reduce the probability of cells migrating into the optic 110 from either side. PCO may be reduced or eliminated.

[0023] Frame 124A may also have sharp outer corners (on the exterior surface of frame 124A). Optic 110 may have sharp corners (not shown). As a result, optic 110 may be surrounded by sharp edges on all sides. These sharp edges may also reduce the probability of cells migrating into optic 110 from either side. PCO may be reduced or eliminated.

[0024] The IOL 100A may improve patient outcomes. The streamlined outer periphery 128A of the cross section of the loop 122A may reduce adhesion of the loop 122A to the capsular bag 130A during removal and / or repositioning outside the body. Therefore, damage to the patient's eye due to manipulation of the haptics 120A may be reduced. The smooth curvature of the outer periphery 128A may also improve the stability of the IOL 100A when it is in place. Sharp edges, such as the edge 129A of the haptic structure 120A, may further reduce PCO. Therefore, the performance of the IOL 100A may be improved.

[0025] 2A and 2B show another exemplary embodiment of a haptic structure 120B for an ophthalmic device such as an IOL. For clarity, FIGS. 2A and 2B are not to scale and not all components may be shown. FIG. 2A shows a cross section of the haptic structure 120B. FIG. 2B shows a cross section of the haptic structure 120B resting against a capsular bag 130B of a patient's eye during use. The IOL, and haptics 120B, which are a part of it, are similar to haptics 120A and IOL 100A. Thus, similar components have similar reference numbers. Thus, the IOL includes an optic (not explicitly shown) and a haptic structure 120B (only shown in cross section) similar to optic 110 and haptic structure 120A. In some embodiments, the haptic structure 120B is a closed-loop haptic structure, having a loop similar to loop 122A, and optionally including a frame similar to frame 124A. The frame may be omitted, a different size loop or loops and / or a different number of loops may be used, In other embodiments, haptic structure 120B may have one or more open loops.

[0026] Haptic structure 120B functions in a similar manner and shares similar advantages as haptic structure 120A. Thus, haptic structure 120B includes outer peripheral surface 128B and inner peripheral surface 126B, which are similar to surfaces 128A and 126A, respectively. However, the cross-sectional shape is different. The entire peripheral surface 128B is smoothly curved. Thus, macroscopically, outer peripheral surface 128B has a continuous and distinct slope. In the embodiment shown in FIGS. 2A-2B, there is no additional texture or feature on outer peripheral surface 128B. In another embodiment, texture, features, and / or coatings may be present on IOL 100B. Due to its curved shape, outer peripheral surface 128B may be in better contact with capsular bag 130B, as shown in FIG. 2B. As a result, haptics 120A may be able to better stabilize IOL 100A. Additionally, the lack of sharp corners on outer periphery 128B, with curved sharp corners, may reduce the likelihood that the loop will adhere to and tear capsule 130A when removed or repositioned outside the body.

[0027] Instead of having a teardrop shape, the majority of the periphery 126B is flat. Therefore, the inner periphery 126B includes one straight side and two sharp corners 129B-1 and 129B-2. Macroscopically, the slope of the inner periphery 126B is not pronounced at the corners 129B-1 and 129B-2 and is not continuous on both sides of the corners 129B-1 and 129B-2. Due to the presence of the sharp corners 129B-1 and 129B-2, the optic (not shown) is surrounded by a sharp edge on the posterior side, which may reduce or prevent PCO. The optic may also have a curved edge profile for glare reduction. The edge profile of the cross section of the haptic may blend and transition smoothly to the edge profile of the optic.

[0028] Haptic structure 120B may improve patient outcomes. The streamlined outer peripheral surface 128B of the cross section may reduce adhesion of haptic structure 120B to capsular bag 130B during removal and / or repositioning outside the body. Therefore, damage to the patient's eye due to manipulation of haptic 120B may be reduced. The smooth curvature of outer peripheral surface 128B may also improve the stability of the IOL when it is in place. Sharp edges, such as edge 129B-1 for haptic structure 120B, may further reduce PCO. Therefore, the performance of the IOL may be improved.

[0029] 3A and 3B show another exemplary embodiment of a haptic structure 120C for an ophthalmic device such as an IOL. For clarity, FIGS. 3A and 3B are not to scale and not all components may be shown. FIG. 3A shows a cross section of the haptic structure 120C. FIG. 3B shows a cross section of the haptic structure 120C resting against a capsular bag 130C of a patient's eye during use. The IOL, and haptics 120C of which it is a part, are similar to haptics 120A and / or 120B. Thus, similar components have similar reference numbers. Thus, the IOL includes an optic (not explicitly shown) and haptic structure 120C similar to optic 110 and haptic structures 120A and / or 120B. In some embodiments, haptic structure 120B is a closed-loop haptic structure, including a loop similar to loop 122A, and optionally a frame similar to frame 124A. The frame may be omitted, a different size loop or loops and / or a different number of loops may be used, In other embodiments, haptic structure 120C may have one or more open loops.

[0030] Haptic structure 120C functions in a similar manner and shares similar advantages as haptic structures 120A and / or 120B. Thus, haptic structure 120C includes outer circumferential surface 128C and inner circumferential surface 126C that are similar to surfaces 128A / 128B and 126A / 126B, respectively. However, the cross-sectional shapes are different. The entire outer circumferential surface 128B and inner circumferential surface 126C are smoothly curved.

[0031] In the embodiment shown in FIGS. 3A-3B, an additional texture or feature 129C may be present on the rear of the outer circumferential surface 128C. Whether the feature 129C is a texture or feature depends on its characteristic size as described above. The texture is shown as a stepped pattern. However, other patterns are possible. For example, there may be repeating wavy surfaces, repeating lines, or other textures or features. In another embodiment, the feature 129C may simply be a surface roughness. In some embodiments, textures, features, and / or coatings may be present on the IOL to help reduce PCO. Due to its curved shape, the outer circumferential surface 128C may make more secure contact with the capsule 130C. As a result, the haptics 120C may be able to better stabilize the IOL. Additionally, the curved sharp corners and lack of sharp corners on the outer circumferential surface 128AC may reduce the likelihood that the loop 122AC will adhere to or tear the capsule 130A in the event of removal or repositioning outside the body.

[0032] The haptic structure 120C may have improved performance. The streamlined outer peripheral surface 128C of the cross section may reduce adhesion of the haptic structure 120C to the capsular bag 130C during removal and / or repositioning outside the body. Therefore, damage to the patient's eye due to manipulation of the haptic 120C may be reduced. The smooth curvature of the outer peripheral surface 128C may also improve the stability of the IOL when it is in place. The texture / features 129C for the haptic structure 120BC may further reduce PCO. Therefore, the performance of the IOL may be improved.

[0033] 4A and 4B show another exemplary embodiment of a haptic structure 120D for an ophthalmic device such as an IOL. For clarity, FIGS. 4A and 4B are not to scale and not all components may be shown. FIG. 4A shows a cross section of the haptic structure 120D. FIG. 4B shows a cross section of the haptic structure 120D resting against a capsular bag 130D of a patient's eye during use. The IOL, and haptics 120D of which it is a part, are similar to haptics 120A, 120B, and / or 120C. Thus, similar components have similar reference numbers. Thus, the IOL includes an optic (not explicitly shown) and haptic structure 120D that are similar to optic 110 and haptic structures 120A, 120B, and / or 120C. In some embodiments, haptic structure 120C is a closed-loop haptic structure, having loops similar to loops 122A, 122B, and / or 120C, and optionally including a frame similar to frame 124A. The frame may be omitted, or a different size loop or loops and / or a different number of loops may be used. In other embodiments, haptic structure 120b may have one or more open loops.

[0034] Haptic structure 120D functions in a similar manner and shares similar advantages as haptic structures 120A, 120B, and / or 120C. Thus, haptic structure 120D includes outer circumferential surface 128D and inner circumferential surface 126C, which are similar to surfaces 128A / 128B / 128C and 126A / 126B / 126C, respectively. The cross section of haptic structure 120D is most similar to haptic structure 120C. Instead of having a vertical long axis as shown in FIGS. 3A and 3B, in FIGS. 4A-4B the long axis is horizontal.

[0035] Additionally, haptic structure 120D has coating 127D. Although shown as being present on only a portion of the surface of haptic structure 120D, coating 127D may cover the entire peripheral surface 128D and 126D. Coating 127D may limit adhesion of peripheral surface 128D to capsule 130D. Coating 127D may therefore facilitate manipulation or removal from the body. For example, coating 127D may include, but is not limited to, one or more of polyethylene glycol (PEG), plasma, and parylene.

[0036] The haptic structure 120D may improve the performance of the IOL. The streamlined outer peripheral surface 128B of the cross section may reduce adhesion of the haptic structure 120D to the capsular bag 130D during removal and / or repositioning outside the body. The coating 127D may also facilitate repositioning and / or removal outside the body. Therefore, damage to the patient's eye due to manipulation of the haptics 120D may be reduced. The smooth curvature of the outer peripheral surface 128D may also increase the stability of the IOL when it is in place. The texture / features 127D of the haptic structure 120D may further reduce PCO. Therefore, the performance of the IOL may be improved.

[0037] FIG. 5 illustrates a cross section of another exemplary embodiment of a haptic structure 120E for an ophthalmic device such as an IOL. For clarity, FIG. 5 is not to scale and not all components may be shown. The IOL, and haptics 120E of which it is a part, are similar to haptics 120A, 120B, 120C, and / or 120D. Thus, similar components have similar reference numbers. Thus, the IOL includes an optic (not explicitly shown) and haptic structure 120E similar to optic 110 and haptic structures 120A, 120B, 120C, and / or 120D. In some embodiments, haptic structure 120E is a closed-loop haptic structure, has a loop similar to loop 122A, and optionally includes a frame similar to frame 124A. The frame may be omitted, and one or more loops of a different size and / or a different number of loops may be used. In other embodiments, haptic structure 120E can have one or more open loops.

[0038] Haptic structure 120E includes outer periphery 128E and inner periphery 126E that are similar to faces 128A, 128B, 128C, and 128D and 126A, 126B, 126C, and 126D, respectively. However, the cross-sectional shape is different. The cross-section is generally rectangular, but has rounded corners and rounded sides. Although all corners are shown as rounded, in some embodiments, one or both corners of inner periphery 126E may be sharpened to reduce PCO.

[0039] Haptic structure 120E may improve patient outcomes. The streamlined cross-sectional outer surface 128E may reduce adhesion of haptic structure 120E to the capsular bag during removal and / or repositioning outside the body. Therefore, damage to the patient's eye due to manipulation of haptics 120E may be reduced. The smooth curvature of outer surface 128E may also increase the stability of the IOL when it is in place.

[0040] FIG. 6 illustrates a cross section of another exemplary embodiment of a haptic structure 120F for an ophthalmic device such as an IOL. For clarity, FIG. 6 is not to scale and not all components may be shown. The IOL, and haptics 120F of which it is a part, are similar to haptics 120A, 120B, 120C, 120D, and / or 120E. Thus, similar components have similar reference numbers. Thus, the IOL includes an optic (not explicitly shown) and haptic structure 120F similar to optic 110 and haptic structures 120A, 120B, 120C, 120D, and / or 120E. In some embodiments, haptic structure 120F is a closed-loop haptic structure, has a loop similar to loop 122A, and optionally includes a frame similar to frame 124A. The frame may be omitted, and one or more loops of a different size and / or a different number of loops may be used. In other embodiments, haptic structure 120F can have one or more open loops.

[0041] Haptic structure 120F includes outer circumferential surface 128F and inner circumferential surface 126F, which are similar to outer surfaces 128A, 128B, 128C, 128D, and 128E and inner surfaces 126A, 126B, 126C, 126D, and 126E, respectively. However, the cross-sectional shape is different. The cross-section is generally rectangular with flat sides, but has rounded corners. Although all corners are shown as rounded, in some embodiments, one or both corners of inner circumferential surface 126F may be sharpened to reduce PCO. Haptic structure 120F also includes coating 129F. Although shown as being present on only a portion of the surface of haptic structure 120F, coating 129F may cover a larger or different area, including the entire circumferential surfaces 128F and 126F. Coating 129F may reduce PCO. For example, coating 129F may include, but is not limited to, one or more of PEG and Erufosine.

[0042] The streamlined cross-sectional outer surface 128F may reduce adhesion of the haptic structure 120F to the capsular bag during removal and / or repositioning outside the body. Therefore, damage to the patient's eye due to manipulation of the haptics 120F may be reduced. The smooth curvature of the outer surface 128F may also increase the stability of the IOL when it is in place. The coating 129F of the haptic structure 120F may also reduce PCO. Therefore, the performance of the IOL may be improved.

[0043] FIG. 7 illustrates a cross section of another exemplary embodiment of a haptic structure 120G for an ophthalmic device such as an IOL. For clarity, FIG. 7 is not to scale and not all components may be shown. The IOL, and haptics 120G of which it is a part, are similar to haptics 120A, 120B, 120C, 120D, 120E, and / or 120F. Thus, similar components have similar reference numbers. Thus, the IOL includes an optic (not explicitly shown) and haptic structure 120G similar to optic 110 and haptic structures 120A, 120B, 120C, 120D, 120E, and / or 120F. In some embodiments, haptic structure 120G is a closed loop haptic structure, has a loop similar to loop 122A, and optionally includes a frame similar to frame 124A. The frame may be omitted, a different size loop or loops and / or a different number of loops may be used, In other embodiments, haptic structure 120G may have one or more open loops.

[0044] Haptic structure 120G includes outer periphery 128G and inner periphery 126G that are similar to outer surfaces 128A, 128B, 128C, 128D, 128E, and 128F and inner surfaces 126A, 126B, 126C, 126D, 126E, and 126F, respectively. However, the shape of the cross section is different. The cross section is a purely organic shape with smoothly curving periphery 128G and 126G. Additionally, the cross section includes sharp corners 129G to reduce PCO.

[0045] The streamlined cross-sectional outer surface 128G may reduce adhesion of the haptic structure 120G to the capsular bag during removal and / or repositioning outside the body. Therefore, damage to the patient's eye due to manipulation of the haptics 120G may be reduced. The smooth curvature of the outer surface 128G may also increase the stability of the IOL when it is in place. The coating 129G of the haptic structure 120G may also reduce PCO. Therefore, the performance of the IOL may be improved.

[0046] FIG. 8 illustrates a cross-section of another exemplary embodiment of a haptic structure 120H for an ophthalmic device such as an IOL. For clarity, FIG. 8 is not to scale and not all components may be shown. The IOL, and haptics 120H of which it is a part, are similar to haptics 120A, 120B, 120C, 120D, 120E, 120F, and / or 120G. Thus, similar components have similar reference numbers. Thus, the IOL includes an optic (not explicitly shown) and haptic structure 120H similar to optic 110 and haptic structures 120A, 120B, 120C, 120D, 120E, 120F, and / or 120G. In some embodiments, haptic structure 120H is a closed-loop haptic structure, including a loop similar to loop 122A and optionally a frame similar to frame 124A. The frame may be omitted, a different size loop or loops and / or a different number of loops may be used, In other embodiments, haptic structure 120H may have one or more open loops.

[0047] Haptic structure 120H includes outer periphery 128H and inner periphery 126H that are similar to outer surfaces 128A, 128B, 128C, 128D, 128E, 128F, and 128G and inner surfaces 126A, 126B, 126C, 126D, 126E, 126F, and 126G, respectively. However, the cross-sectional shape is different. The cross-section is teardrop shaped that is similar to the teardrop shape of haptic structure 120A. However, corners 129A are rounded. Although the sides of inner periphery 126H are shown as rounded (i.e., convex), in other embodiments, the sides may be flat or concave.

[0048] Haptic structure 120H also includes texture or feature 129H-1 and coating 129H-2 on texture / feature 129H-1. Texture / feature 129H-1 can be similar to texture / feature 129C. Coating 129H-2 can be similar to coating 127D or 129F. Coating 129H-2 can therefore reduce PCO. Coating 129H-2 can be used to facilitate removal or manipulation of haptic structure 120H outside of the body.

[0049] The streamlined cross-sectional outer surface 128H may reduce adhesion of the haptic structure 120H to the capsular bag during removal and / or repositioning outside the body. Therefore, damage to the patient's eye due to manipulation of the haptics 120H may be reduced. The smooth curvature of the outer surface 128H may also increase the stability of the IOL when it is in place. The texture / features 129H-1 may reduce PCO. The coating 129H-2 of the haptic structure 120H may also reduce PCO or facilitate removal or repositioning outside the body. Therefore, the performance of the IOL may be improved.

[0050] FIG. 9 illustrates a cross-section of another exemplary embodiment of a haptic structure 120J for an ophthalmic device such as an IOL. For clarity, FIG. 9 is not to scale and may not show all components. The IOL, and haptics 120J, which are a part of it, are similar to haptics 120A, 120B, 120C, 120D, 120E, 120F, 120G, and / or 120H. Thus, similar components have similar reference numbers. Thus, the IOL includes an optic (not explicitly shown) and haptic structure 120J, which are similar to optic 110 and haptic structures 120A, 120B, 120C, 120D, 120E, 120F, 120G, and / or 120H. In some embodiments, haptic structure 120J is a closed-loop haptic structure, having loops similar to loop 122A, and optionally including a frame similar to frame 124A. The frame may be omitted, or a different size loop or loops and / or a different number of loops may be used. In other embodiments, haptic structure 120J may have one or more open loops.

[0051] Haptic structure 120J includes outer periphery 128J and inner periphery 126J that are similar to outer surfaces 128A, 128B, 128C, 128D, 128E, 128F, 128G, and 128H and inner surfaces 126A, 126B, 126C, 126D, 126E, 126F, 126G, and 126H, respectively. However, the cross-sectional shape is different. The cross-section generally has a teardrop shape that is similar to the teardrop shape of haptic structures 120A and 120H. Corners 129A are rounded. Additionally, the sides of inner periphery 126J are concave rather than straight or convex.

[0052] Haptic structure 120J also includes texture or feature 129J-1 and coating 129J-2. Texture / feature 129J-1 can be similar to texture / feature 129C and 129H-1. Thus, texture / feature 129J-1 can reduce PCO. Coating 129J-2 can be similar to coating 127D or 129F. Coating 129J-2 can also be disposed on the anterior side. Coating 129J-2 can reduce PCO and / or reduce adhesion of haptic structure 120J to the capsular bag when haptic structure 120J is being manipulated.

[0053] The smooth curvature of the cross-sectional outer periphery 128J may reduce adhesion of the haptic structure 120J to the capsular bag during removal and / or repositioning outside the body. Therefore, damage to the patient's eye due to manipulation of the haptics 120J may be reduced. The smooth curvature of the outer periphery 128J may also increase the stability of the IOL when it is in place. The texture / features 129J-1 may reduce PCO. The coating 129J-2 of the haptic structure 120J may also reduce PCO or facilitate removal or repositioning outside the body. Therefore, the performance of the IOL may be improved.

[0054] FIG. 10 illustrates a cross-section of another exemplary embodiment of a haptic structure 120k for an ophthalmic device such as an IOL. For clarity, FIG. 10 is not to scale and not all components may be shown. The IOL, and haptics 120k, which are a part of it, are similar to haptics 120A, 120B, 120C, 120D, 120E, 120F, 120G, 120H, and / or 120J. Thus, similar components have similar reference numbers. Thus, the IOL includes an optic (not explicitly shown) and haptic structure 120K, which are similar to optic 110 and haptic structures 120A, 120B, 120C, 120D, 120E, 120F, 120G, 120H, and / or 120J. In some embodiments, haptic structure 120K is a closed-loop haptic structure, having loops similar to loop 122A, and optionally including a frame similar to frame 124A. The frame may be omitted, or a loop or loops of a different size and / or number may be used. In other embodiments, haptic structure 120K may have one or more open loops.

[0055] Haptic structure 120K includes outer circumferential surface 128K and inner circumferential surface 126K, which are similar to outer surfaces 128A, 128B, 128C, 128D, 128E, 128F, 128G, 128H, and 128J, and inner surfaces 126A, 126B, 126C, 126D, 126E, 126F, 126G, 126H, and 126J, respectively. The cross-section of haptic 120K matches the cross-section of haptic structure 120J. Haptic structure 120K also includes texture / feature 129K-1 and coating 129K-2, which are similar to texture / feature 129J-1 and 129J-2, respectively. However, coating 129K-2 may also be located on the rear side, away from texture / feature 129K-1.

[0056] The smooth curvature of the outer peripheral surface 128K of the cross section may reduce adhesion of the haptic structure 120K to the capsular bag during removal and / or repositioning outside the body. Therefore, damage to the patient's eye due to manipulation of the haptic 120K may be reduced. The smooth curvature of the outer peripheral surface 128K may also increase the stability of the IOL when it is in place. The texture / features 129K-1 may reduce PCO. The coating 129K-2 of the haptic structure 120K may also reduce PCO or facilitate removal or repositioning outside the body. Therefore, the performance of the IOL may be improved.

[0057] Various features of the haptic structures 120A, 120B, 120C, 120D, 120E, 120F, 120G, 120H, 120J, and 100K have been described herein. Those skilled in the art will recognize that one or more of these features may be combined in ways not expressly disclosed herein and inconsistent with the methods and devices described. Furthermore, as described above, the dimensions and / or aspect ratios of each embodiment may vary. Thus, different embodiments may have different cross-sectional appearances. Furthermore, individual features of different embodiments may be combined. For example, different quadrants shown in the cross-sections of different embodiments may be combined to form new embodiments. Furthermore, no symmetry is required for the cross-sections, such as symmetry around horizontal, vertical, and / or oblique axes.

[0058] 11A, 11B, and 11C show various embodiments of textures and / or features that may be used for one or more of textures / features 129C, 129H-1, 129J-1, and 129K-1. FIG. 11A shows texture / feature 140A with height h-1. FIG. 11B shows texture / feature 140B with height h-2. FIG. 11C shows texture / feature 140C with height h-3. Texture / feature 140A has a square profile and is shown as a series of lines. Texture / feature 140B is sawtooth with characteristic height h-2. Texture / feature 140C may be seen as lines or steps, but with curved edges. With heights h-1, h-2, and h-3 on the order of nanometers to microns, items 140A, 140B, and 140C are considered to be textures. At heights h-1, h-2, and h-3 on the order of tens of microns or more, items 140A, 140B, and 140C are features. However, heights h-1, h-2, and h-3 are significantly smaller than the radius of curvature of the cross-section of the haptic. Furthermore, while FIGS. 11A-11C show a particular pattern and constant height, textures / features 140A, 140B, and 140C may have various heights, widths, and / or pitches. Furthermore, at smaller scales, textures / features 140A, 140B, and / or 140C may simply be viewed as surface roughness of the haptic. At the scales described above, textures / features 140A, 140B, and 140C may assist in reducing PCO.

[0059] It is recognized that various of the above-disclosed and other features and functions, or alternatives thereof, may be desirably combined into many other different devices or applications. It is also recognized that various presently unforeseen or unforeseen alternatives, modifications, variations or improvements may be subsequently made by those skilled in the art, and that such alternatives, modifications and improvements are also intended to be included within the scope of the following claims.

Claims

1. 1. An ophthalmic device comprising: an optical component including an optical axis; a haptic structure coupled to the optic and for retaining the ophthalmic device within a capsule of a patient's eye, the haptic structure including an open loop, at least a portion of the haptic structure including a cross section having a continuously curved perimeter surface for contacting the capsule; Including, the cross-section includes a teardrop shape and extends in a direction parallel to the optical axis; The cross-section includes an inner periphery having a straight portion or a recess at an end opposite a rounded corner.

2. The ophthalmic device of claim 1 , wherein the open loop is C-shaped or L-shaped.

3. The Ophthalmic Device of claim 1 , wherein the haptic structure includes a sharp edge or corner separate from the outer perimeter surface.

4. The Ophthalmic Device of claim 3 , wherein the sharp edge or corner is located on an inner periphery of the cross-section.

5. The Ophthalmic Device of claim 1 , wherein the haptic structure includes rounded corners separate from the outer perimeter surface.

6. The ophthalmic device of claim 1 , wherein the outer circumferential surface is streamlined.

7. The ophthalmic device of claim 1 , wherein the haptic structure comprises a texture for reducing posterior capsular opacification (PCO).

8. The ophthalmic device of claim 1 , wherein the haptic structure includes features for reducing posterior capsule opacification (PCO).

9. The ophthalmic device of claim 1 , wherein the haptic structure comprises a coating for reducing posterior capsular opacification (PCO).

10. The ophthalmic device of claim 1 , wherein the haptic structure includes a coating to reduce adhesion of the haptic structure to the lens capsule.

11. The ophthalmic device of claim 1 , wherein at least a portion of said cross-section is convex.

12. The ophthalmic device of claim 1 , wherein at least a portion of said cross-section is concave.

13. The ophthalmic device of claim 1 , wherein at least a portion of the cross-section is substantially flat.

14. 1. An ophthalmic device comprising: an optical component including an optical axis; a haptic structure coupled to the optic and for retaining the ophthalmic device within a capsule of the patient's eye, the haptic structure comprising an open loop, at least a portion of the haptic structure comprising a cross-section having a continuously curved periphery for contacting the capsule, the haptic structure further comprising at least one of a texture for reducing posterior capsule opacification (PCO), a feature for reducing PCO, a first coating for reducing PCO, or a second coating for reducing adhesion of the haptic structure to the capsule; Including, the cross-section includes a teardrop shape and extends in a direction parallel to the optical axis; The cross-section includes an inner periphery having a straight portion or a recess at an end opposite a rounded corner.

15. The ophthalmic device of claim 14 , wherein the haptic structure comprises the texture or features, and the texture or features comprises at least one of a wavy surface, a series of repeating lines forming a square profile, or sawtooth.

16. The ophthalmic device of claim 14 , wherein the haptic structure comprises the texture or the features, and the texture or the features comprises a roughened surface.

17. The ophthalmic device of claim 14 , wherein the haptic structure comprises the first coating or the second coating, and the first coating or the second coating comprises at least one of Polyethylene Glycol (PEG), Plasma, Parylene, or Erufosine.

18. The Ophthalmic Device of claim 14 , wherein the haptic structure includes a sharp edge or corner separate from the outer perimeter surface.

19. 20. The Ophthalmic Device of claim 18, wherein the sharp edge or corner is located on an inner periphery of the cross-section.

20. 1. An ophthalmic device comprising: an optical component including an optical axis; a haptic structure coupled to the optic and for retaining the ophthalmic device within a capsule of the eye, at least a portion of the haptic structure having a cross-section that includes a teardrop shape and extends in a direction generally parallel to the optical axis, the cross-section including a continuously curved outer periphery that extends along the direction of the optical axis for contacting the capsule, the cross-section further including an inner periphery having a concave side at an end opposite a rounded corner; 13. An ophthalmic device comprising:

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