Ophthalmic lens for presbyopia correction with reduced visual interference

Abstract

An intraocular lens (IOL) includes: a lens body having an anterior surface and a posterior surface disposed around an optical axis; and a progressive phase step structure formed on a refractive surface profile of at least one of the front surface or the rear surface, the at least one of the front surface or the rear surface having an outer region, an inner region, and a transition region continuously connecting the outer region and the inner region. The refractive surface profile in the outer region provides a base power, and the refractive surface profile in the inner region provides a lower plus power. The progressive phase step structure includes a first annular ridge structure within the inner region and a second annular ridge structure extending radially from the transition region to the outer region.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of U.S. Provisional Patent Application No. 63 / 486,567, filed on February 23, 2023, which is hereby assigned to the assignee of this application and is hereby expressly incorporated herein by reference in its entirety for all applicable purposes as if fully set forth below. Background Art

[0003] In its simplest form, the human eye provides vision by transmitting light through a transparent outer portion called the cornea and focusing an image onto the retina with the help of the lens. The quality of the focused image depends on many factors, including the size and shape of the eye and the transparency of the cornea and lens. When age or disease causes the lens to become less transparent, vision deteriorates because less light is able to reach the retina. This defect in the eye's lens is medically known as a cataract. The treatment for this condition is surgical removal of the lens and replacement of the lens' function with a presbyopia-correcting intraocular lens (PC-IOL).

[0004] PC-IOLs are used in both refractive lens exchange and cataract surgery to replace the eye's natural lens and correct refractive errors. These include extended depth of focus (EDOF) IOLs and diffractive multifocal IOLs. While the benefits of existing PC-IOLs are known, PC-IOL designs continue to improve outcomes and benefit patients. Summary of the Invention

[0005] Aspects of the present disclosure provide an ophthalmic lens, such as an intraocular lens (IOL) or a contact lens, comprising: a lens body having a front surface and a back surface disposed about an optical axis; and a progressive phase step structure formed on a refractive surface profile of at least one of the front surface or the back surface, the at least one of the front surface or the back surface having an outer zone, an inner zone, and a transition zone continuously connecting the outer zone and the inner zone. The refractive surface profile in the outer zone provides a base power, and the refractive surface profile in the inner zone provides a lower add power. The progressive phase step structure includes a first annular ridge structure within the inner zone and a second annular ridge structure extending radially from the transition zone to the outer zone.

[0006] Aspects of the present disclosure also provide an ophthalmic lens, such as an intraocular lens (IOL), comprising: a lens body having an anterior surface and a posterior surface disposed about an optical axis; and a progressive phase step structure formed on a refractive surface profile of at least one of the anterior surface or the posterior surface. The refractive surface profile and the progressive phase step structure are formed to provide continuous vision with a visual acuity of approximately 0.2 logMAR within a defocus range between 0 diopters and -2.2 diopters.

[0007] Aspects of the present disclosure further provide an intraocular lens (IOL) comprising: a lens body having an anterior surface and a posterior surface disposed about an optical axis; and a progressive phase step structure formed on a refractive surface profile of at least one of the anterior surface or the posterior surface, the at least one of the anterior surface or the posterior surface having an outer zone, an inner zone, and a transition zone continuously connecting the outer zone and the inner zone. The refractive surface profile in the outer zone provides base power, and the refractive surface profile in the inner zone provides lower add power. The progressive phase step structure includes a first annular ridge structure within the inner zone and a second annular ridge structure extending radially from the transition zone to the outer zone. The refractive surface profile and the progressive phase step structure are formed to provide continuous vision with a visual acuity of approximately 0.2 logMAR in a defocus range between 0 diopters and -2.2 diopters. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to understand the above features of the present disclosure in detail, the present disclosure briefly summarized above may be described in more detail with reference to the embodiments, some of which are shown in the accompanying drawings. However, it should be noted that the drawings only illustrate some aspects of the present disclosure and that the present disclosure may allow for other equally effective embodiments.

[0009] Figure 1A Depicted is a top view of an intraocular lens (IOL) according to certain embodiments.

[0010] Figure 1B Depicted according to some embodiments Figure 1A Side view of a portion of the IOL.

[0011] Figure 2A The refractive surface profile of the anterior surface of an IOL according to some embodiments is depicted.

[0012] Figure 2B Depicted according to some embodiments Figure 2A Surface profile of the progressive phase step structure on the anterior surface of the IOL.

[0013] Figure 3ADepicted are monocular visual acuity (VA) for exemplary low visual disturbance (LVD) PC-IOLs, according to certain embodiments.

[0014] Figure 3B 、 Figure 3C and Figure 3D Depicted is the modulation transfer function (MTF) of an exemplary low visual distraction (LVD) PC-IOL, in accordance with certain embodiments.

[0015] Figure 4 Depicted are example systems for designing, configuring, and / or forming an IOL in accordance with certain embodiments.

[0016] Figure 5 Depicted are example operations for forming an IOL in accordance with certain embodiments.

[0017] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements and features of one embodiment may be beneficially incorporated in other embodiments without further recitation. DETAILED DESCRIPTION

[0018] Embodiments described herein provide an ophthalmic lens, such as an intraocular lens (IOL), and methods and systems for manufacturing the same, having a surface profile that produces controlled phase shift variations in light waves passing through various regions of the IOL, resulting in an extended depth of focus. In certain embodiments, the lens surface of the IOL has a progressive phase step structure that, in combination with a suboptical add power surface, produces a continuous visual acuity from far to near vision. The presbyopia-correcting intraocular lens (PC-IOL) described herein can provide full visual range performance (e.g., by maximizing depth of focus until near vision) while minimizing visual disturbances (VD), such as halos, without the use of a diffractive structure. Other example embodiments may include a contact lens having the described progressive phase step structure that, in combination with a suboptical add power surface, produces a continuous visual acuity from far to near vision.

[0019] Non-diffractive presbyopia correction intraocular lens (PC-IOL)

[0020] Figure 1A Depicted is a top view of an intraocular lens (IOL) 100 , according to some embodiments. Figure 1B Depicted is a side view of an IOL 100. IOL 100 includes a lens body 102 and a haptic portion 104 coupled to a peripheral, non-optical portion of lens body 102.

[0021] The lens body 102 has a front surface 102A and a back surface 102P arranged about an optical axis OA. The back surface 102P can have a smooth surface profile, such as a smooth convex profile. On the front surface 102A, a progressive phase step structure is formed on the base surface profile of the front surface 102A. The front surface 102A includes an outer zone 106, an inner zone 108, and a transition zone 110, which continuously connects the outer zone 106 and the inner zone 108. The base surface in the outer zone 106 provides a base focal power suitable for distance correction (and is considered to be zero subadd power). The base surface in the inner zone 108 provides a subadd power suitable for near vision correction. The transition zone 110 can have two or more subzones 110A and 110B. The progressive phase step structure can be formed on the front surface 102A in one or more of the subzones 110A and 110B of the transition zone 110. The progressive phase step structure causes light waves passing through various regions or zones of the lens body 102 to produce varying phase shifts. Constructive interference between light waves with different phase shifts produces an extended depth of focus. Therefore, the overall surface profile Z of the front surface 102A is A (r) (described as the sagittal height of a point on the front surface 102A at a radial distance r from a point on the front surface 102A at the optical axis OA) is the refractive surface profile Z RP (r) and the surface profile Z of the progressive phase step structure PS (r) and Z A (r) = Z RP (r)+Z PS (r), as described in detail below.

[0022] Although in the examples described herein, the refractive surface profile and the progressive phase step structure are formed only on the front surface 102A of the lens body 102, the refractive surface profile and the progressive phase step structure may be formed on the rear surface 102P of the lens body 102, or on both the front surface 102A and the rear surface 102P of the lens body 102.

[0023] It should be noted that the shape and curvature of the lens body 102 are shown for illustrative purposes only, and other shapes and curvatures are also within the scope of the present disclosure. Figure 1B The lens body 102 shown has a biconvex shape. In other examples, the lens body 102 can have a plano-convex shape, a convexo-concave shape, or a plano-concave shape.

[0024] The lens body 102 can be made of a biocompatible material such as modified poly(methyl methacrylate) (PMMA), modified PMMA hydrogel, hydroxyethyl methacrylate (HEMA), PVA hydrogel, other silicone polymer materials, and hydrophobic acrylic polymer materials, such as those available from Alcon, Inc., Fort Worth, Texas, USA. and The diameter of the lens body 102 is between about 4.5 mm and about 7.5 mm, for example, about 6.0 mm.

[0025] The haptic portion 104 includes radially extending struts (also referred to as "haptics") 104A and 104B that are coupled (e.g., glued or welded) to a peripheral portion of the lens body 102 or molded with a portion of the lens body 102 and thus extend radially from the lens body 102 to engage the peripheral wall of the capsular sac of the eye, thereby maintaining the lens body 102 in a desired position in the eye. The haptics 104A and 104B can be made of a biocompatible material such as modified poly(methyl methacrylate) (PMMA), modified PMMA hydrogel, hydroxyethyl methacrylate (HEMA), PVA hydrogel, other silicone polymer materials, and hydrophobic acrylic polymer materials, such as those available from Alcon, Inc., Fort Worth, Texas, USA. and The loops 104A and 104B typically have radially outward ends defining arcuate end portions. The end portions of the loops 104A and 104B may be separated by a length between about 6 mm and about 22 mm, for example, about 13 mm. The loops 104A and 104B have a specific length so that when in contact with the equatorial region of the capsular bag after implantation, the end portions generate a slight engagement pressure. Although Figure 1A One example configuration of loops 104A and 104B is depicted, but any plate-like or other type of loop may be used.

[0026] Figure 2A Depicts the refractive surface profile Z of the front surface 102A RP (r). Refractive surface profile Z RP (r) A refractive surface profile Z comprising an inner zone 108 (also referred to as "Zone 1", 0≤r<r5) providing lower add power for near vision correction Zone 1 (r) and an outer zone 106 (also referred to as "Zone 4", r7≤r<r) providing a base focal power for distance correction 10 ) of the refractive surface profile Z Zone 4 (r). With refractive surface profile Z Zone 1 (r) inner region 108 and having a refractive surface profile Z Zone 4 The outer region 106 of (r) is connected to the refractive surface profile Z via a transition region 110 (r5≤r<r7) Zone 2 (r) and Z Zone 3(r) is continuously connected. The transition zone 110 of the front surface 102A may include two or more zones, including a sub-zone 110A (also referred to as "Zone 2", r5≤r<r6) and a sub-zone 110B (also referred to as "Zone 3", r6≤r<r7) surrounding the sub-zone 110A. The sag offsets D2, D3 and D4 are added to the refractive surface profile Z Zone 1 (r), Z Zone 2 (r), Z Zone 3 (r) and Z Zone 4 (r) Generates the refractive surface profile Z RP(r ) so that there is no discontinuity at the boundaries between adjacent zones. For example, the refractive surface profile Z RP (r) can be defined as:

[0027]

[0028] Where the refractive surface profile Z Zone 1 (r), Z Zone 2 (r), Z Zone 3 (r) and Z Zone 4 (r) is defined as:

[0029]

[0030] and

[0031]

[0032] The curvature c1 and the cone constant k1 are determined based on the desired lower add power of the inner zone 108. The coefficients c4 and k4 are determined based on the base power of the outer zone 106. The transition zone parameters c2, k2, c3, and k3 are determined by optimizing the design to achieve better visual acuity (VA) performance. By optimizing these refractive zone parameters and combining them with a progressive phase structure, the embodiments herein can provide smooth and continuous VA performance between approximately -1.0 diopters of intermediate vision and approximately -2.0 diopters of near vision. The coefficients A4 and A6 are the fourth-order aspheric coefficients and the sixth-order aspheric coefficients.

[0033] The outer radius r5 of the inner zone 108 can be between about 0.95 mm and about 1.5 mm, for example, about 1.1 mm. The outer radius r6 of the sub-zone 110A of the transition zone 110 can be between about 1.0 mm and about 1.5 mm, for example, about 1.25 mm. The outer radius r7 of the sub-zone 110B of the transition zone 110 can be between about 1.25 mm and about 2.05 mm, for example, about 1.3 mm. Base (r) = Z Zone 4The radius of curvature (1 / c4) of (r) (also referred to as the "base radius") can be between about 5.5 mm and about 95 mm. Zone 1 The radius of curvature (1 / c1) of (r) and the refractive surface profile Z Zone 3 The radius of curvature (1 / c3) of (r) can each be between about the base radius minus 10 mm and about the base radius. Zone 2 The radius of curvature (1 / c2) of (r) may be between about the base radius and about the base radius plus 10 mm, greater than the refractive surface profile Z Zone 3 The curvature radius of (r) is (1 / c3). The cone constants k1, k2, k3, and k4 can be between -100 and +100, between -50 and +50, between -50 and +5-, and between -2500 and +2500, respectively. The coefficient A4 can be between -5.0×10 -4 mm -3 +5.0×10 -4 mm -3 The coefficient A6 can be between -5.0×10 -4 mm -5 +5.0×10 -4 mm -5 between.

[0034] Figure 2B The surface profile Z of the progressive phase step structure on the front surface 102A is depicted. PS (r). Surface profile Z PS (r) include a progressive ladder described as follows:

[0035]

[0036] Wherein, Δ1 is the step height of zone r2≤r<r3 within the inner zone 108 (Zone 1) relative to the optical axis OA (r=0), Δ2 is the step height of zone r4≤r<r6 spanning the inner zone 108 (Zone 1) and the sub-zone 110A (Zong 2) relative to zone r2≤r<r3, Δ3 is the step height of zone r7≤r≤r8 within the outer zone 106 (Zone 4) relative to zone r4≤r<r6, and Δ4 is ​​the step height of zone r9≤r≤r1 within the outer zone 106 (Zone 4). 10 The step height relative to the region r7≤r≤r8.

[0037] like Figure 2BAs shown, the progressive phase step structure includes two annular ridge structures: a first annular ridge structure extending radially from r=r1 (within inner region 108) to r=r4 (within inner region 108), and a second annular ridge structure extending radially from r=r6 (at the boundary between sub-regions 110A and 110B in transition region 110) to r=r9 (within outer region 106). The height of the first annular ridge structure increases radially from r=r1 to r=r2, and decreases radially from r=r3 to r=r4, with r=r4 being less than r=r5 (at the boundary between inner region 108 and transition region 110). The height of the second annular ridge structure increases radially from r=r6 (at the boundary between sub-regions 110A and 110B) to r=r7 (at the boundary between transition region 110 and outer region 106), and decreases radially from r=r8 to r=r9.

[0038] Moving radially outward from the optical axis OA, four phase shift steps can be obtained. Constructive interference between light waves with different phase shifts produces an extended depth of focus.

[0039] Parameters Δ1, Δ2, Δ3, Δ4, r1, r2, r3, r4, r8, r9, and r 10 The range is as follows.

[0040] parameter scope unit <![CDATA[Δ1]]> ±5 μm <![CDATA[Δ2]]> ±2 μm <![CDATA[Δ3]]> ±10 μm <![CDATA[Δ4]]> ±5 μm <![CDATA[r1]]> 0.3-1.5 mm <![CDATA[r2]]> 0.4-1.5 mm <![CDATA[r3]]> 0.6-1.5 mm <![CDATA[r4]]> 0.8-1.5 mm <![CDATA[r8]]> 1.3-2.1 mm <![CDATA[r9]]> 1.4-2.3 mm <![CDATA[r 10 ]]> 3 mm

[0041] Example

[0042] Figure 3A Depicts the LogMAR (logarithm of the minimum angle of resolution) score of Figure 2A and Figure 2B The surface profile Z shown RP (r)+Z PS (r) Monocular visual acuity (VA) of an exemplary low visual disturbance (LVD) PC-IOL. A 0 logMAR score corresponds to a 20 / 20 score on a Snellen chart, or 100 lp / mm (line pairs / millimeter) spatial resolution (also known as "spatial frequency"). A 0.4 logMAR score corresponds to a 20 / 50 score on a Snellen chart, or 40 lp / mm. Monocular VA was assessed using a 3-mm (photopic) aperture to determine the depth of focus (also known as "defocus") of the lens.

[0043] exist Figure 3A, the monocular VA 302 of a typical monofocal IOL (forming a single focus) and the monocular VA 304 of a typical EDOF IOL (forming a single elongated focus) are shown, along with simulation results 306 for the monocular VA of an exemplary LVD PC-IOL. The monocular VA 304 of the typical EDOF IOL shows an extended depth of focus compared to the monocular VA 302 of the typical monofocal IOL. The monocular VA 306 of the exemplary LVD PC-IOL shows a similar extended depth of focus as the monocular VA 304 of the typical EDOF IOL, but shows a significant enhancement of VA at intermediate distance (approximately -1.5 diopters) and near distance (approximately -2 diopters) compared to the typical EDOF IOL. As shown in Figure 3A As can be seen in the , the exemplary LVD PC-IOL shows a continuous range of visual acuity from far to near (i.e., VA above or better than 0.1 logMAR from far to up to -1.8 diopters of near, and VA above 0.2 logMAR from 0 diopters of far to up to -2.2 diopters of near).

[0044] Figure 3B 、 Figure 3C and Figure 3D Depicts the Figure 2A and Figure 2B The surface profile Z shown RP (r)+Z PS (r) Modulation transfer functions (MTFs) of exemplary low visual disturbance (LVD) PC-IOLs evaluated at the focal plane at 100 lp / mm (corresponding to a VA of 20 / 20), 67 lp / mm (corresponding to a VA of 20 / 30), and 50 lp / mm (corresponding to a VA of 20 / 40).

[0045] Systems for designing IOLs

[0046] Figure 4 An exemplary system 400 for designing, configuring, and / or forming an IOL, such as the LVD PC-IOL described herein, is depicted. As shown, the system 400 includes, but is not limited to, a control module 402, a user interface display 404, an interconnect 406, an output device 408, and at least one I / O device interface 410 that can allow various I / O devices (e.g., a keyboard, a display, a mouse device, a pen input, etc.) to be connected to the system 400.

[0047] The control module 402 includes a central processing unit (CPU) 412, a memory 414, and a storage device 416. The CPU 412 can access and execute programming instructions stored in the memory 414. Similarly, the CPU 412 can access and store application data residing in the memory 414. The interconnect 406 transmits programming instructions and application data between the CPU 412, the I / O device interface 410, the user interface display 404, the memory 414, the storage device 416, the output device 408, etc. The CPU 412 can represent a single CPU, multiple CPUs, a single CPU with multiple processing cores, etc. Additionally, in some embodiments, the memory 414 represents volatile memory, such as random access memory. Furthermore, in some embodiments, the storage device 416 can be a non-volatile memory, such as a disk drive, a solid-state drive, or a collection of storage devices distributed across multiple storage systems.

[0048] As shown, the storage device 416 includes input parameters 418, including parameters used in the equations provided herein (e.g., Figure 2A and Figure 2B 4 ). Input parameters 418 include the lens base power and the lower add power. Memory 414 includes a calculation module 420 for calculating control parameters such as the outer radius of each zone and the step height of the surface profile of the lens surface (e.g., the front surface). Memory 414 also includes input parameters 422.

[0049] In some embodiments, input parameters 422 correspond to input parameters 418 or at least a subset thereof. In some embodiments, input parameters 422 are retrieved from storage device 416 and executed in memory 414 during the calculation of the control parameters. In such examples, calculation module 420 includes executable instructions for calculating the control parameters based on input parameters 422. In some other embodiments, input parameters 422 correspond to parameters received from a user via user interface display 404. In such embodiments, calculation module 420 includes executable instructions for calculating the control parameters based on the information received from user interface display 404.

[0050] In some embodiments, the calculated control parameters are output via output device 408 to a lens manufacturing system, which is configured to receive the control parameters and form a lens accordingly. In some other embodiments, system 400 itself represents at least a portion of a lens manufacturing system. In such embodiments, control module 402 then causes hardware components (not shown) of system 400 to form a lens according to the control parameters. Details of lens manufacturing systems are known to those of ordinary skill in the art and are omitted here for the sake of brevity.

[0051] Methods for forming an IOL

[0052] Figure 5 Depicted is an example operation 500 for forming an IOL (e.g., IOL 100). In some embodiments, step 510 of operation 500 is performed by a system (e.g., system 400), while step 520 is performed by a lens manufacturing system. In some other embodiments, both steps 510 and 520 are performed by a lens manufacturing system.

[0053] In step 510, control parameters (e.g., outer radius of each zone and step height of the surface profile of the lens surface (e.g., the front surface)) are calculated based on input parameters (e.g., lens base power and lower add power). The calculations performed in step 510 are based on one or more of the embodiments described herein. Various optimization techniques or algorithms can be used to select appropriate outer radius of each zone and step height of the surface profile of the lens surface (e.g., the front surface). For example, a method can be used to numerically minimize an error function for calculating the difference between target visual acuity and achieved visual acuity by varying design parameters.

[0054] In step 520, an IOL (e.g., IOL 100) is formed based on the calculated control parameters (e.g., the outer radius of each zone and the step height of the surface profile of the front surface of the lens) using appropriate methods, systems, and apparatus typically used to manufacture lenses, as known to those of ordinary skill in the art.

[0055] Embodiments described herein provide presbyopia-correcting IOLs that achieve continuous vision from distance to near while avoiding or at least reducing the visual disturbances (e.g., halos, glare) more commonly seen with diffractive presbyopia-correcting IOLs. By providing continuous distance-to-near vision, exemplary embodiments of low-distraction PC-IOLs can, in some cases, provide a greater depth of focus than some other EDO IOLs. Avoiding visual disturbances (VDs) such as halos or glare can also avoid a decrease in visual acuity and contrast sensitivity.

[0056] While the foregoing is directed to embodiments of the present disclosure, other and further embodiments of the disclosure may be envisaged without departing from the basic scope thereof, and the scope of the disclosure is determined by the claims that follow.

Claims

1. An ophthalmic lens comprising: a lens body having a front surface and a rear surface disposed about an optical axis; as well as A progressive phase step structure formed on a refractive surface profile of at least one of the front surface or the back surface, the at least one of the front surface or the back surface having an outer region, an inner region, and a transition region continuously connecting the outer region and the inner region, wherein: The refractive surface profile in the outer zone provides base power; The refractive surface profile in the inner zone provides a lower add power in the inner zone; and The progressive phase ladder structure comprises: a first annular ridge structure within the inner region; and A second annular ridge structure extends radially from the transition region to the outer region.

2. The ophthalmic lens according to claim 1, wherein The refractive surface profile and the progressive phase step structure are formed to provide continuous vision with a visual acuity of approximately 0.2 logMAR in defocus between 0 diopters and -2.2 diopters.

3. The ophthalmic lens of claim 1 , wherein: The transition region includes a first sub-region and a second sub-region surrounding the first sub-region; and A radius of curvature of the refractive surface profile in the first sub-region is greater than a radius of curvature of the refractive surface profile in the second sub-region.

4. The ophthalmic lens of claim 3, wherein: the first annular ridge structure radially increases in height from a first radial distance from the optical axis to a second radial distance from the optical axis and radially decreases in height from a third radial distance from the optical axis to a fourth radial distance from the optical axis; and The fourth radial distance is less than a fifth radial distance from the optical axis at a boundary between the inner region and the transition region.

5. The ophthalmic lens of claim 4, wherein: the second annular ridge structure radially increases in height from a sixth radial distance from the optical axis to a seventh radial distance from the optical axis and radially decreases in height from an eighth radial distance from the optical axis to a ninth radial distance from the optical axis, The sixth radial distance is at a boundary between the first sub-region and the second sub-region; The seventh radial distance is at a boundary between the transition region and the outer region.

6. The ophthalmic lens according to claim 1, wherein The lens body includes a hydrophobic acrylic polymer material.

7. The ophthalmic lens of claim 1 , further comprising one or more haptics coupled to the lens body.

8. An ophthalmic lens comprising: a lens body having a front surface and a rear surface disposed about an optical axis; as well as a progressive phase step structure formed on a refractive surface profile of at least one of the front surface or the back surface, wherein: The refractive surface profile and the progressive phase step structure are formed to provide continuous vision with a visual acuity better than 0.2 logMAR in a defocus range between 0 diopters and -2.2 diopters.

9. The ophthalmic lens of claim 8, wherein: The at least one of the front surface or the back surface comprises: an outer zone in which the refractive surface profile provides a base power; an inner region in which the refractive surface profile provides a lower add power; and a transition zone continuously connecting the outer zone and the inner zone; and The progressive phase ladder structure comprises: a first annular ridge structure within the inner region; and A second annular ridge structure extends radially from the transition region to the outer region.

10. The ophthalmic lens of claim 9, wherein: The transition region includes a first sub-region and a second sub-region surrounding the first sub-region, and A radius of curvature of the refractive surface profile in the first sub-region is greater than a radius of curvature of the refractive surface profile in the second sub-region.

11. The ophthalmic lens of claim 10, wherein: the first annular ridge structure radially increases in height from a first radial distance from the optical axis to a second radial distance from the optical axis and radially decreases in height from a third radial distance from the optical axis to a fourth radial distance from the optical axis; and The fourth radial distance is less than a fifth radial distance from the optical axis at a boundary between the inner region and the transition region.

12. The ophthalmic lens of claim 11, wherein: the second annular ridge structure radially increases in height from a sixth radial distance from the optical axis to a seventh radial distance from the optical axis and radially decreases in height from an eighth radial distance from the optical axis to a ninth radial distance from the optical axis; The sixth radial distance is at a boundary between the first sub-region and the second sub-region; The seventh radial distance is at a boundary between the transition region and the outer region.

13. The ophthalmic lens according to claim 9, wherein The lens body includes a hydrophobic acrylic polymer material.

14. The ophthalmic lens of claim 9, further comprising one or more haptics coupled to the lens body.

15. An intraocular lens (IOL), comprising: a lens body having a front surface and a rear surface disposed about an optical axis; as well as A progressive phase step structure formed on a refractive surface profile of at least one of the front surface or the back surface, the at least one of the front surface or the back surface having an outer region, an inner region, and a transition region, the transition region continuously connecting the outer region and the inner region, wherein The refractive surface profile in the outer zone provides base power; The refractive surface profile in the inner zone provides lower add power, and The progressive phase ladder structure comprises: a first annular ridge structure within the inner region; and a second annular ridge structure extending radially from the transition zone to the outer zone, wherein the refractive surface profile and the progressive phase step structure are formed to provide continuous vision with a visual acuity better than 0.2 logMAR in a defocus range between 0 diopters and -2.2 diopters.

16. The IOL of claim 15, wherein: The transition region includes a first sub-region and a second sub-region surrounding the first sub-region, and A radius of curvature of the refractive surface profile in the first sub-region is greater than a radius of curvature of the refractive surface profile in the second sub-region.

17. The IOL of claim 16, wherein: the first annular ridge structure radially increases in height from a first radial distance from the optical axis to a second radial distance from the optical axis and radially decreases in height from a third radial distance from the optical axis to a fourth radial distance from the optical axis; and The fourth radial distance is less than a fifth radial distance from the optical axis at a boundary between the inner region and the transition region.

18. The IOL of claim 17, wherein: the second annular ridge structure radially increases in height from a sixth radial distance from the optical axis to a seventh radial distance from the optical axis and radially decreases in height from an eighth radial distance from the optical axis to a ninth radial distance from the optical axis; The sixth radial distance is at a boundary between the first sub-region and the second sub-region; The seventh radial distance is at a boundary between the transition region and the outer region.

19. The IOL of claim 15, wherein: The lens body includes a hydrophobic acrylic polymer material.

20. The IOL of claim 15, further comprising one or more haptics coupled to the lens body.

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