Ophthalmic lenses that reduce negative dysphotopsia and reduce glare
Patent Information
- Application Number
- JP2023565916
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2021-04-29
- Filing Date
- 2022-04-28
- Publication Date
- 2025-04-30
AI Technical Summary
Existing intraocular lenses often cause negative dysphotopsias and glare due to oblique light bypassing or reflection from the lens edges, which can be exacerbated by small incision surgery requirements.
Intraocular lenses with optical edges featuring varying thickness and undulating surfaces, coupled with an optical skirt that blocks light transmission, reduce oblique light entry and minimize glare by directing light away from the edge, while maintaining a compact design suitable for small incisions.
The lenses significantly reduce or eliminate negative dysphotopsias and glare, enhance mechanical stability, and improve optical performance by increasing the optic diameter without enlarging the incision size, thus optimizing vision correction.
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Abstract
Description
[Technical field]
[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of priority to U.S. Provisional Patent Application No. 63 / 181,584, entitled "OPHTHALMIC LENS WITH MITIGATION & REDUCTION OF DYSPHOTOPSIAS," filed April 29, 2021, by inventors Kamal K. Das and David L. Jinkerson, which is incorporated by reference in its entirety herein as if fully and completely set forth herein.
[0002] The present invention as claimed below relates generally to ophthalmic lenses, including but not limited to intraocular lenses. [Background technology]
[0003] The human eye can suffer from many diseases that cause anything from mild deterioration to complete loss of vision. Contact lenses and glasses can compensate for some diseases, but in other cases eye surgery may be necessary. In some instances, implants may be beneficial or desirable. For example, intraocular lenses can replace the cloudy natural crystalline lens in the eye and improve vision.
[0004] While the benefits of intraocular lenses and other implants are known, improvements in lenses, delivery systems, components, and processes continue to improve outcomes and benefit patients. Summary of the Invention [Means for solving the problem]
[0005] Novel and useful systems, devices, and methods for ophthalmic surgery are set forth in the accompanying claims, and exemplary embodiments are provided to enable those skilled in the art to make and use the claimed subject matter.
[0006] For example, some embodiments may comprise or consist essentially of an intraocular lens that may limit the amount of oblique light that bypasses the lens, which may substantially reduce or eliminate negative dysphotopsia. Some embodiments may additionally or alternatively limit the angle of oblique light that may reflect off the edge of the lens, which may substantially reduce or eliminate glare. In further specific embodiments, the lens may comprise an optical edge having a wave or dip that may direct light away from the edge and not avoid or bypass the lens. Such features may also be advantageous to increase the diameter of the optic without compromising delivery for small incision surgery. For example, the optical edge may have a wavy profile that extends from about 0.5 millimeters to about 2.5 millimeters from the central optic. Some embodiments may have an optic diameter of at least 7 millimeters.
[0007] Additionally or alternatively, some embodiments may include an optical skirt that protrudes from the optical edge, which may also block light transmission around the optic to substantially reduce or eliminate negative dysphotopsia. In some embodiments, the optical skirt may surround the optic outside of the haptic joint. In further specific embodiments, the optical skirt may include a light absorbing colorant, such as a green dye, a red dye, or both, which may reduce the photopic maximum.
[0008] More generally, some embodiments of the ophthalmic lens include a posterior optical surface, an anterior optical surface, and an optical edge between the posterior optical surface and the anterior optical surface, the optical edge forming a substantially circular periphery with a periodically varying thickness. For example, the anterior optical surface, the posterior optical surface, or both may be contoured, thereby forming an optical edge with a varying thickness. In further particular embodiments, the posterior optical surface may be contoured in phase with the contours of the anterior optical surface, or out of phase, and the phase angle may vary. In yet other examples, the surface contours may have a non-uniform pattern with different amplitudes and phases at different locations along the circumference of the optical edge. In some embodiments, the thickness of the optical edge may vary periodically with at least two periods. In further particular embodiments, the thickness may vary sinusoidally. In some embodiments, the thickness may vary between at least two peaks and at least two valleys.
[0009] Additionally or alternatively, some embodiments of the ophthalmic lens may include an optical skirt coupled to the optical edge. The optical skirt may be configured to block the transmission of light around the periphery of the optical edge. Some embodiments of the optical skirt may include a colorant configured to absorb light. For example, the colorant may include a dye configured to reduce the photopic maximum to further aid in the transmission of oblique light around the periphery of the optic. Additionally or alternatively, the optical skirt may include a chromophore that blocks at least one of ultraviolet light, blue light, and green light. Some embodiments of the optical skirt may include or be composed of a rubber elastomer or a soft acrylic.
[0010] Features, elements, and aspects described in connection with some embodiments can also be omitted, combined, or replaced with alternative features. Other features, objects, advantages, and preferred modes of making and using the claimed subject matter are described in more detail below with reference to the accompanying drawings of exemplary embodiments.
[0011] The accompanying drawings illustrate certain objects, advantages, and preferred modes of making and using certain embodiments of the claimed subject matter, in which like reference numbers represent like parts. [Brief description of the drawings]
[0012] [Figure 1] FIG. 1 is an isometric view of an example of a lens suitable for implantation in an eye. [Diagram 2] FIG. 2 is a front view of the lens of FIG. [Diagram 3] FIG. 2 is a side view of the lens of FIG. [Figure 4] FIG. 2 is a top view of another example of a lens suitable for implantation in the eye. [Diagram 5] FIG. 2 is an isometric view of another example of a lens suitable for implantation in the eye. [Figure 6] FIG. 6 is a side view of the lens of FIG. 5. [Figure 7] FIG. 2 is an isometric bottom view of another example of a lens suitable for implantation in an eye. [Figure 8] FIG. 8 is a side view of the lens of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0013] The following description of exemplary embodiments provides information to enable one of ordinary skill in the art to make and use the claimed subject matter, but may omit certain details already known in the art. Thus, the following detailed description is to be taken as illustrative and not limiting.
[0014] Exemplary embodiments may also be described herein with reference to spatial relationships between or orientations of various elements depicted in the accompanying drawings. Generally, such relationships or orientations assume a coordinate system that corresponds to or is relative to a patient in a position to receive an implant. However, as will be appreciated by those skilled in the art, this coordinate system is not a strict prescription and is merely for descriptive convenience.
[0015] FIG. 1 is an isometric view of an example of a lens 100 illustrating various features that may be relevant in some embodiments. As shown in the example of FIG. 1, the lens 100 may comprise an anterior optical surface 105, which may comprise or consist essentially of a central optic 110 and a peripheral optic 115 concentrically disposed around the central optic 110. The lens 100 may have a width w1 that may be varied to achieve a desired result for a particular application. A width w1 of about 6 millimeters to about 8 millimeters may be advantageous in some embodiments. In a further particular example, a width w1 of about 6.5 millimeters to about 7.5 millimeters may be suitable. The peripheral optic 115 has a width w2 that may also be varied. A width w2 of about 1 millimeter to about 3 millimeters may be advantageous in some embodiments. The lens 100 also generally comprises an optical edge 120, which may form a periphery having a variable thickness t around the anterior optical surface 105. In the example of FIG. 1, the optical edge 120 forms a substantially circular periphery.
[0016] FIG 2 is a front view of the lens 100 of FIG 1 and FIG 3 is a side view of the lens 100 of FIG 1 showing further details that may be relevant to some embodiments. In the examples of FIGS. 2 and 3, the lens 100 further comprises a posterior optical surface 205. In some examples, the posterior optical surface 205 may be formed by surfaces of the central optic 110 and the peripheral optic 115 that face away from the anterior optical surface 105. As shown in the examples of FIGS. 2 and 3, an optical edge 120 may interface the posterior optical surface 205 and the anterior optical surface 105.
[0017] As shown in Figures 2 and 3, the optical edge 120 may have a thickness t that varies periodically. More specifically, the example of Figure 2 illustrates an embodiment in which the anterior optical surface 105 and the posterior optical surface 205 are undulating out of phase, resulting in a thickness t that varies from peak to peak across this portion of the optical edge 120. This portion of the optical edge 120 illustrated in Figure 2 has a valley approximately halfway between the two peaks. Figure 3 also illustrates half of the optical edge 120, where the thickness t varies from valley to valley across this portion, increasing to a peak approximately halfway between the two valleys. Thus, the optical edge 120 in the examples of Figures 2 and 3 has a thickness t that varies periodically over two periods. In some examples, the thickness t may vary sinusoidally. Additionally or alternatively, the thickness t may vary over more than two periods.
[0018] FIG. 4 is a top view of another example of the lens 100, and more particularly, a top view of the anterior optical surface 105 of the lens 100, showing further details that may be relevant to some embodiments. For example, the lens 100 of FIG. 4 includes an optical skirt 405 that may be coupled to the optical edge 120. The optical skirt 405 may be configured to block the transmission of light around the periphery of the optical edge 120. The optical skirt 405 may have a width w3 that may vary in different embodiments. For example, a width w3 in the range of about 0.5 millimeters to about 1 millimeter may be suitable for some embodiments. In some embodiments, the optical skirt 405 may include a colorant configured to absorb light. For example, the optical skirt 405 may have a colorant configured to absorb light at wavelengths of about 550 to 555 nanometers. In further specific embodiments, the colorant may include a dye configured to reduce the photopic maximum to aid in the transmission of oblique light around the periphery of the optic. Additionally or alternatively, the optical skirt 405 may include a chromophore that may block at least one of ultraviolet light, blue light, and green light.
[0019] Suitable materials for the optics skirt 405 include rubber elastomers or soft acrylics, which may have suitable tensile properties for folding. Further specific examples of suitable materials include butyl rubber, latex rubber, natural rubber, pure rubber, neoprene rubber, acrylonitrile rubber, styrene-butadiene rubber, ethylene-propylene-diene monomer rubber, acrylonitrile-butadiene-styrene (ABS) rubber, epichlorohydrin rubber, hypalon rubber, silicone rubber, and siloxane elastomers such as poly(dimethylsiloxane), polyurethane rubber, Viton rubber, ethylene-butylene rubber, isobutylene rubber, and polyphosphazene elastomers such as poly(bistrifluoroethoxyphosphazene), poly(dimethylphosphazene), or poly(phenylmethylphosphazene).
[0020] In some embodiments, the optical skirt 405 may be secured to the optical edge 120 during the manufacturing process of the lens 100. For example, the optical skirt 405 may be placed on a lens wafer and a lens monomer composition may be cast onto the wafer. The monomer composition may cover the inner edge of the optical skirt 405 above and below, thereby sandwiching the optical skirt 405 within the optical edge 120. For example, an optical skirt 405 having a width w3 of 1 millimeter may be manufactured by inserting a 1.5 millimeter ring 0.5 millimeters into the wafer, thereby providing a 0.5 millimeter skirt interface.
[0021] FIG. 5 is an isometric view of another example of a lens 100 showing various features that may be associated with some embodiments. For example, the lens 100 includes one or more haptics 505 for positioning the central optic 110 and the peripheral optic 115 in the eye. As shown in the example of FIG. 5, some embodiments of the haptics 505 may extend from both sides of the peripheral optic 115. Additionally or alternatively, the haptics 505 may be bonded to the optical edge 120 where the thickness t is greatest, which may increase the mechanical stability of the lens, increase the rotational stability of the lens, reduce the total volume, and improve the axial positioning of the optic to optimize the refractive result. FIG. 5 also shows an embodiment in which only the anterior optical surface 105 is contoured.
[0022] Figure 6 is a side view of the lens 100 of Figure 5 showing further details that may be relevant to some embodiments. For example, Figure 6 shows in more detail the profile of the optical edge 120 formed by the contours of the anterior optical surface 105 and the substantially planar posterior optical surface 205. As shown, the planar configuration of the posterior optical surface 205 can form a sharp edge, which may reduce the risk of posterior capsule opacification.
[0023] FIG. 7 is an isometric bottom view of another example of lens 100 illustrating various features that may be relevant to some embodiments. In FIG. 7, for example, lens 100 includes a ring 705 on the rear side of lens 100. As shown in the example of FIG. 7, ring 705 may be continuous or may be bonded to posterior optical surface 205. Posterior optical surface 205 in FIG. 7 is substantially planar. In general, ring 705 may be located along the periphery of posterior optical surface 205 or medially to reduce the risk of posterior capsule opacification. In some embodiments, an additional barrier may be added to the interface between optical edge 120 and haptics 505, which may further reduce the possibility of posterior capsule opacification and reduce glare or other visual impairment due to blocking of significantly off-axis light.
[0024] Figure 8 is a side view of lens 100 of Figure 7 further showing ring 705. In the example of Figure 8, the periphery of ring 705 can form an edge 805 that is substantially perpendicular to posterior optical surface 205 (as shown in Figure 7). Edge 805 can significantly reduce the risk of posterior capsule opacification in some embodiments.
[0025] The systems, devices, and methods described herein may provide significant advantages. For example, the lens 100 may substantially reduce or eliminate negative dysphotopsia, edge glare, or both. In further specific embodiments, the lens 100 may have an optical edge with a variable thickness that may direct light away from the optical edge and not avoid or bypass the lens 100. The out-of-phase relief pattern may provide a combination that also reduces visual impairment. The variable thickness of the optical edge may additionally reduce the overall volume of the lens 100, which may increase the diameter of the optic without increasing the size of the incision required to insert the lens 100. Increasing the size of the optic may increase the imaging size of the pupil and may also increase mechanical stability without affecting spherical aberration correction. In some embodiments, increasing the size of the optic may also increase the correction of spherical aberration and other higher order aberrations for patients with large pupils.
[0026] Additionally or alternatively, some embodiments of lens 100 may have an optical skirt that protrudes from the optical edge, which may block light transmission around the periphery of the optical portion, thereby substantially reducing or eliminating negative dysphotopsia.
[0027] Although shown in several exemplary embodiments, those skilled in the art will recognize that the systems, devices, and methods described herein are susceptible to various changes and modifications that fall within the scope of the appended claims. Moreover, the description of various alternatives using terms such as "or" does not require mutual exclusivity unless the context clearly requires, and the indefinite articles "a" or "an" do not limit the subject matter to a single example unless the context clearly requires. Components may also be combined or excluded in various configurations for purposes of sale, manufacture, assembly, or use. For example, in some configurations, the features of the optical edge 120 and the optical skirt 405 may be combined in various ways.
[0028] The claims may also encompass additional subject matter not specifically described. For example, certain features, elements, or aspects may be omitted from the claims if they are not necessary to distinguish the novel and non-obvious features from those already known to those skilled in the art. Features, elements, and aspects described in connection with some embodiments may also be omitted, combined, or replaced by alternative features serving the same, equivalent, or similar purpose without departing from the scope of the invention as defined by the appended claims.
Claims
1. a posterior optical surface; an anterior optical surface; an optical edge between the posterior optical surface and the anterior optical surface, the optical edge forming a substantially circular periphery having a thickness that varies periodically over at least two periods; An ophthalmic lens comprising:
2. The ophthalmic lens of claim 1 , wherein the thickness varies sinusoidally.
3. the anterior optical surface comprises a central optic and a peripheral optic; the optical edge joining the peripheral optic to the posterior optical surface; 2. The ophthalmic lens of claim 1.
4. The ophthalmic lens of claim 3 , wherein the peripheral optic has a width ranging from about 0.5 millimeters to about 3 millimeters.
5. The ophthalmic lens of claim 1 , further comprising an optical skirt coupled to the optical edge, the optical skirt configured to block the transmission of light around the periphery of the optical edge.
6. The ophthalmic lens of claim 5 , wherein the optic skirt comprises a tint configured to absorb light.
7. The ophthalmic lens of claim 6 , wherein the colorant comprises a dye configured to reduce the photopic maximum.
8. The ophthalmic lens of claim 1 , wherein the posterior optical surface is substantially planar.
9. The ophthalmic lens of claim 8 further comprising a ring on the posterior optical surface.
10. The ophthalmic lens of claim 8 , further comprising a ring coupled to a periphery of the posterior optical surface.
11. The ophthalmic lens of claim 3 further comprising one or more haptics extending from the peripheral optic.
12. The ophthalmic lens of claim 11 , wherein the haptics extend from both sides of the peripheral optic.
13. The ophthalmic lens of claim 11 , wherein the haptics are bonded to either side of the optical edge.
14. An ophthalmic lens according to any one of claims 11 to 13, wherein the haptic portion is bonded to a peripheral optic where the thickness of the optical edge is greatest.
15. A lens for implantation in an eye, said lens comprising: a posterior optical surface; an anterior optical surface; an optical edge between the posterior optical surface and the anterior optical surface, the optical edge having a thickness that varies between at least two peaks and at least two valleys; A lens comprising:
16. The lens of claim 15 , wherein the optical edge forms a substantially circular periphery around the posterior and anterior optical surfaces.
17. the anterior optical surface comprises a central optic and a peripheral optic; the optical edge joining the peripheral optic to the posterior optical surface; 16. The lens of claim 15.
18. 20. The lens of claim 17, wherein the peripheral optic has a width ranging from about 0.5 millimeters to about 3 millimeters.
19. 16. The lens of claim 15, further comprising an optical skirt coupled to the optical edge, the optical skirt configured to block the transmission of light around the periphery of the optical edge.
20. The lens of claim 19 , wherein the optic skirt includes a tint configured to absorb light.
21. 21. The lens of claim 20, wherein the colorant comprises a dye configured to reduce the photopic maximum.
22. The lens of claim 15 , wherein the posterior optical surface is substantially planar.
23. 23. The lens of claim 22, further comprising a ring on the posterior optical surface.
24. 23. The lens of claim 22, further comprising a ring coupled to a periphery of the posterior optical surface.
25. The lens of claim 17 further comprising one or more haptics extending from the peripheral optic.
26. The lens of claim 25 , wherein the haptics extend from both sides of the peripheral optic.
27. The lens of claim 25 , wherein the haptics are bonded to either side of the optical edge.
28. 26. The lens of claim 25, wherein the haptics are bonded to a peripheral optic where the thickness of the optical edge is greatest.
29. A lens for implantation in an eye, said lens comprising: a posterior optical surface; an anterior optical surface; an optical edge between the posterior optical surface and the anterior optical surface; an optical skirt coupled to the optical edge, the optical skirt configured to block the transmission of light around the periphery of the optical edge; A lens comprising:
30. 30. The lens of claim 29, wherein the optic skirt includes a tint configured to absorb light.
31. 31. The lens of claim 30, wherein the colorant comprises a dye configured to reduce the photopic maximum at 555 nanometers.
32. 30. The lens of claim 29, wherein the optic skirt comprises or consists essentially of a rubber elastomer.
33. 30. The lens of claim 29, wherein the optical skirt includes a chromophore that blocks at least one of ultraviolet light, blue light, and green light.
34. 30. The lens of claim 29, wherein the optic skirt comprises, or consists essentially of, a soft acrylic resin.
35. The optical skirt is Butyl rubber, latex rubber, natural rubber, pure rubber, neoprene rubber, acrylonitrile rubber, styrene-butadiene rubber, ethylene-propylene-diene monomer rubber, acrylonitrile-butadiene-styrene (ABS) rubber, epichlorohydrin rubber, hypalon rubber, silicone rubber, and siloxane elastomers (such as poly(dimethylsiloxane)), polyurethane rubber, Viton rubber, ethylene-butylene rubber, isobutylene rubber, and polyphosphazene elastomers (such as poly(bistrifluoroethoxyphosphazene), poly(dimethylphosphazene), or poly(phenylmethylphosphazene)).
32. A lens according to any one of claims 29 to 31, comprising or consisting essentially of:
36. A central optical portion; a peripheral optic concentrically disposed about the central optic, the peripheral optic comprising a posterior optical surface, an anterior optical surface, and an optical edge between the posterior optical surface and the anterior optical surface; An ophthalmic lens comprising: An ophthalmic lens, wherein the anterior optical surface is contoured such that the optical edge has a varying thickness.
37. 37. The ophthalmic lens of claim 36, wherein the thickness varies sinusoidally.
38. 37. The ophthalmic lens of claim 36, wherein the posterior optical surface is substantially planar.
39. 37. The ophthalmic lens of claim 36, further comprising a ring on the posterior optical surface.
40. 37. The ophthalmic lens of claim 36, further comprising a ring coupled to a periphery of the posterior optical surface.
41. 37. The ophthalmic lens of claim 36, further comprising one or more haptics extending from the peripheral optic.
42. 42. The ophthalmic lens of claim 41, wherein the haptic portion is bonded to a peripheral optic where the thickness of the optical edge is greatest.
43. An ophthalmic lens according to any one of claims 36 to 42, wherein the peripheral optic has a width in the range of about 1 millimeter to about 3 millimeters.