Full depth of focus intraocular lens

Abstract

an ophthalmic lens comprising: an anterior surface and a posterior surface, at least one of the anterior surface and the posterior surface including a first surface region corresponding to a photopic aperture of a pupil and a second surface region corresponding to a difference between the photopic aperture and the intermediate adapting aperture of the pupil; a first microstructure pattern formed on the first surface region, the first microstructure pattern introducing a phase perturbation into an optical path of incident light to provide full depth of focus for photopic vision;

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates generally to ophthalmic lenses, and more particularly to presbyopia-correcting full depth of focus ophthalmic lenses. [Background technology]

[0002] The human eye includes a cornea and a lens that are intended to focus light entering the eye's pupil onto the retina. However, the eye can exhibit various refractive errors that cause light not to be properly focused onto the retina, which can result in reduced visual acuity. Ocular aberrations can range from relatively simple spherical and cylindrical errors that cause myopia, hyperopia, or regular astigmatism, to more complex refractive errors that can cause, for example, halos and starbursts in a person's vision.

[0003] Many procedures have been used over the years to correct various ocular aberrations. These procedures include spectacles, contact lenses, corneal refractive surgery (e.g., laser-assisted in situ keratomileusis (LASIK) or corneal transplants), and intraocular lenses (IOLs). The diagnosis and specification of spherocylindrical spectacles and contact lenses for the treatment of myopia, hyperopia, and astigmatism are well established.

[0004] Presbyopia describes a condition in which a person's eyes lose the ability to see objects clearly at close range. Ophthalmic lenses with multifocal capabilities have been developed to help patients focus on objects at relatively close range.

[0005] In particular, IOLs have been developed with multifocal capabilities, allowing patients to focus simultaneously on two or three focal planes, but multifocal IOLs typically cannot provide full vision from near to infinity.

[0006] Additionally, IOLs with extended depth of focus (EDF) capabilities have been developed. However, the extended depth of focus is too limited to fully correct a patient's presbyopia. Therefore, there is a need for a system and method that provides an extended depth of focus (FDoF) that provides a continuous full depth of focus (FDoF) from near to infinity. Summary of the Invention [Means for solving the problem]

[0007] In certain embodiments, an ophthalmic lens includes an anterior surface and a posterior surface, at least one of the anterior surface and the posterior surface including a first surface region corresponding to a photopic aperture of a pupil and a second surface region corresponding to a difference between the photopic aperture and the intermediate adapting aperture of the pupil, and a first microstructure pattern formed on the first surface region, the first microstructure pattern introducing a phase perturbation into an optical path of incident light to provide full depth of focus for photopic vision.

[0008] In certain embodiments, the second surface region may have optical power. Alternatively, the second microstructure pattern may be formed on the second surface region. In certain embodiments, the second microstructure pattern may include bifocal or trifocal diffractive structures.

[0009] For a more complete understanding of the present invention, and the features and advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram of an exemplary IOL. [Figure 2] 1 is a diagram of different pupil apertures. [Figure 3A-3B] 1 shows diagrams of through-focus energy distributions at a photopic aperture with distance-dominant and near-dominant characteristics, respectively. [Figure 4A-4B] 3A and 3B show through-focus images at the photopic aperture corresponding to the diagrams shown in FIGS. 3A and 3B, respectively. [Figure 5A-5B]Figure 5A shows a cross-sectional view of a photopic microstructure for a phase perturbation with optical power beyond the photopic aperture. Figure 5B shows a diagram of the through-focus energy distribution at the intermediate adaptation aperture corresponding to the microstructure shown in Figure 5A compared to the through-focus intermediate adaptation energy distribution corresponding to a typical single vision lens. [Figures 6A-6B] The through-focus images at an intermediate accommodating aperture and a typical prime lens corresponding to the microstructure shown in FIG. 5A are shown, respectively. [Figures 7A-7B] Figure 7A shows a cross-sectional view of a diffractive microstructure for phase perturbation including a bifocal diffractive microstructure beyond the photopic aperture. Figure 7B shows a diagram of the through-focus energy distribution at the intermediate-adaptation aperture corresponding to the microstructure shown in Figure 7A compared to the through-focus intermediate-adaptation energy distribution corresponding to a typical bifocal lens. [Figure 8A-8B] The intermediate accommodating aperture and through-focus images in a typical bifocal lens corresponding to the microstructure shown in FIG. 7A are shown, respectively. [Figure 9A-9B] Figure 9A shows a cross-sectional view of a diffractive microstructure for phase perturbation including a trifocal diffractive microstructure beyond the photopic aperture. Figure 9B shows a diagram of the through-focus energy distribution at the intermediate-adaptation aperture corresponding to the microstructure shown in Figure 9A compared to the through-focus intermediate-adaptation energy distribution corresponding to a typical trifocal lens. [Figures 10A-10B] The intermediate accommodating aperture and through-focus images in a typical trifocal lens corresponding to the microstructure shown in FIG. 9A are shown, respectively. DETAILED DESCRIPTION OF THE INVENTION

[0011] Exemplary embodiments relate to ophthalmic devices such as IOLs and contact lenses. The following description is presented to enable one skilled in the art to make and use the invention and is provided in the context of a patent application and its requirements. Various modifications of the exemplary embodiments, general principles, and features described herein will be readily apparent. The exemplary embodiments will be described primarily in terms of specific methods and systems provided in particular implementations. However, the methods and systems will operate effectively in other implementations. For example, the methods and systems will be described primarily in terms of IOLs. However, the methods and systems may also be used with contact lenses and eyeglasses.

[0012] In the following description, details are given by way of example to facilitate explanation of the disclosed subject matter, but it should be apparent to those skilled in the art that the disclosed embodiments are illustrative and do not encompass all possible embodiments.

[0013] As used herein, hyphenated forms of reference numbers refer to specific instances of elements, and unhyphenated forms of reference numbers refer to generic elements. Thus, for example, device "12-1" refers to an instance of a class of devices collectively referred to as device "12," and generally refers to any one of those referred to as device "12."

[0014] After cataract treatment or replacement of a person's crystalline lens with a conventional monofocal IOL, a patient's vision becomes presbyopic. Conventional solutions involve multifocal intraocular lens (MIOL) designs or extended depth of focus (EDF) designs. Some bifocal IOLs can provide patients with simultaneously good vision at both distance and near distances. However, patients implanted with such bifocal lenses typically have poor intermediate-distance vision. Using a bifocal IOL with additional refractive power for the intermediate distance range can sometimes provide better intermediate-distance vision, but at the expense of poorer near-distance vision. Certain trifocal IOLs can provide patients with some degree of distance, intermediate, and near-distance vision, despite the lack of a continuum of vision from distance to near. Typical EDF IOLs limit depth of focus to intermediate-distance vision, but may still compromise near-distance vision in patients using EDF IOLs. Thus, as noted above, conventional multifocal IOLs cannot provide a full range of presbyopia-correcting vision from near to infinity.

[0015] As described in more detail, full depth of focus IOLs are disclosed that correct presbyopia and provide full vision from near to infinity. The full depth of focus IOLs disclosed herein may provide highly efficient light energy utilization, indicating that the IOLs are resistant to potential photohazards. The full depth of focus IOLs disclosed herein may be implemented using refractive, bifocal, and trifocal designs in areas beyond the photopic aperture and can provide vision approximating monofocal, bifocal, or trifocal intermediate adaptation. The full depth of focus IOLs disclosed herein may restore full vision after a person's lens replacement.

[0016] A diffractive ophthalmic lens, such as the full depth of focus IOL disclosed herein, may be configured based on an optical aperture. The ophthalmic lens may have an anterior surface, a posterior surface, and at least one diffractive structure including multiple echelettes. The diffractive structure may be located on the anterior or posterior surface. The diffractive structure may provide the ophthalmic lens with a presbyopia-correcting full depth of focus at the photopic aperture, while different embodiments of the diffractive structure may provide various types of performance characteristics at the intermediate accommodation aperture.

[0017] For example, a diffractive structure placed at the photopic aperture may provide various photopic through-focus performance (e.g., distance-primary, near-primary, or any other desired performance characteristic). The diffractive structure placed at the photopic aperture may be combined with a second diffractive structure in a region beyond the photopic aperture and within the intermediate aperture. For example, the second diffractive structure may be null, meaning that the second diffractive structure provides only refractive performance and provides monofocal-like through-focus performance at the intermediate aperture of the ophthalmic lens. In a further example, the second diffractive structure may be a bifocal structure and provide bifocal-like through-focus performance at the intermediate aperture of the ophthalmic lens. In yet another example, the second diffractive structure may be a trifocal structure and provide trifocal-like through-focus performance at the intermediate aperture of the ophthalmic lens.

[0018] Referring now to the drawing of FIG. 1 , IOL 101 may represent any type of IOL used in ophthalmology. As shown, IOL 101 includes an optic zone 110 (also referred to herein simply as the “optic”) and two haptics 112-1, 112-2, shown for convenience in an exemplary configuration. In various implementations, IOL 101 may include different types and numbers of haptics 112. In some implementations, IOL 101 may not have haptics. The materials used for optic zone 110 and haptics 112 may be different. For example, IOL 101 may be an unfolded rigid IOL having an optic zone 110 comprising, for example, a polymethylmethacrylate (PMMA) lens. In some implementations, IOL 101 may be a flexible IOL, and optic zone 110 may comprise various materials (e.g., silicone, hydrophobic acrylic, hydrophilic acrylic, hydrogel, collagen copolymer, or combinations thereof). In IOL 101, haptics 112 may comprise a variety of materials (e.g., polypropylene, polymethylmethacrylate (PMMA), hydrophobic acrylic, hydrophilic acrylic, silicone, or combinations thereof). Optic zone 110 may be designed to have a specified optical power or may be designed as a multifocal element with multiple optical powers.

[0019] In particular, the optical zone 110 may be implemented using a full depth-of-focus IOL that corrects presbyopia and provides a full field of view from near to infinity. Accordingly, the present disclosure is directed to microstructures incorporated into one surface of a typical refractive monofocal IOL optic. The microstructures are patterned within the same material as the base IOL optic itself. The microstructures introduce phase perturbations into the optical path of incident photons that result in a very long extension of the IOL optic's presbyopia-correcting depth-of-focus characteristics. For example, the depth of focus may be continuously extended from far or infinity to near distances. The phase perturbations may be limited to a central region of the lens aperture to provide the patient with full depth-of-field photopic vision, as illustrated by the aperture in FIG. 2 below.

[0020] The phase perturbations may be distributed over many discrete concentric regions and may be different for different regions in the IOL aperture (see FIG. 2). Thus, to meet the different requirements of light-adapted and intermediate-adapted vision, a full depth of focus IOL may provide pupil-size dependent performance.

[0021] Reference is now made to Figure 2, which shows a diagram of the pupil's eyepiece aperture 200. The photopic aperture 202 is the aperture that is visible under bright conditions, e.g., daylight conditions, or approximately 3 candelas per square meter (cd / m 2 ) and above. The intermediate adaptation aperture 204 is larger than the photopic adaptation aperture 202 and is suitable for dim light conditions, e.g., in moonlight, or at approximately 3 cd / m 2 and approximately 0.01 cd / m 2 As will be described in more detail below, the full depth of focus IOLs disclosed herein may be implemented using microstructured surface patterns formed in the material of the optic zone 110 at locations corresponding to the photopic aperture 202 and the intermediate adaptation aperture 204.

[0022] As described, phase perturbations in the photopic aperture of a full depth-of-field IOL may provide presbyopia-corrected full depth-of-focus photopic vision. Figures 3A and 3B illustrate two types of photopic energy through focal distributions resulting from two different types of phase perturbation designs, described in detail below and shown in Figures 7A and 9A, respectively.

[0023] Referring now to Figure 3A, Figure 3A shows a through-focus energy diagram 300-1 versus depth of focus. In diagram 300-1, photon energy is plotted against defocus depth to show how photon energy is distributed from far to near distances. In particular, it can be seen that diagram 300-1 shows a far-distance dominant energy curve that provides photopic vision with a continuous depth of focus from far to near distances (see also Figure 4A).

[0024] Referring now to Figure 3B, Figure 3B shows a through-focus energy diagram 300-2 versus depth of focus. In diagram 300-2, photon energy is plotted against defocus depth to show how photon energy is distributed from far to near distances. In particular, it can be seen that diagram 300-2 shows a near-distance dominant energy curve that provides photopic vision with a continuous depth of focus from far to near distances (see also Figure 4B).

[0025] Referring now to Figure 4A, Figure 4A shows through-focus character chart images 400-1 for a lens design corresponding to through-focus energy diagram 300-1. The five chart images in Figure 4A correspond to the defocus distances in Table 1.

[0026] [Table 1]

[0027] The character chart images in Figure 4A (chart image 402-far, chart image 404-far-mid, chart image 406-mid, chart image 408-mid-near, and chart image 410-near) correspond to the distances in Table 1. Chart image 400-1 shows continuous depth of focus over the illustrated range of distances.

[0028] Referring now to Figure 4B, Figure 4B shows through-focus character chart image 400-2 for a lens design corresponding to through-focus energy line diagram 300-2. The five chart images in Figure 4B (chart image 412-far, chart image 414-far-mid, chart image 416-mid, chart image 418-mid-near, and chart image 420-near) correspond to the defocus distances in Table 1. Chart image 400-2 demonstrates continuous depth of focus over the illustrated range of distances.

[0029] Referring now to FIG. 5A, FIG. 5A illustrates a photopic full depth of focus (FDoF) microstructure 500 in cross section. The photopic FDoF microstructure 500 extends across the photopic aperture 202 but does not extend beyond the photopic aperture 202 to the intermediate adaptation aperture 204. At locations between the photopic aperture 202 and the intermediate adaptation aperture 204, normal refractive correction occurs. For the region outside the photopic aperture (RoPA), the photopic microstructure 500 provides refractive power to provide monofocal-like intermediate adaptation vision. Thus, the photopic FDoF microstructure 500 may limit phase perturbations to the photopic aperture 202 and may be free of phase perturbations beyond the photopic aperture 202.

[0030] Referring now to Figure 5B, Figure 5B shows a through-focus energy diagram 501 versus depth of focus for photopic microstructure 500 (see Figure 5A). In diagram 501, photon energy is plotted against defocus depth to show how photon energy is distributed from far to near distances. In particular, diagram 501 shows similarities to a monofocal lens, but can be seen to provide more energy at near distances than a monofocal lens.

[0031] Referring now to Figure 6A, Figure 6A shows a mid-adapting aperture through-focus character chart image 600-1 for a single focal design of photopic microstructure 500 as shown in through-focus energy line diagram 501. The five chart images in Figure 6A (chart image 602-far, chart image 604-far-mid, chart image 606-mid, chart image 608-mid-near, and chart image 610-near) correspond to the defocus distances in Table 1. Chart image 600-1 shows that far image 602 has single focal quality while maintaining a moderately continuous depth of focus, especially for near distances.

[0032] Referring now to Figure 6B, Figure 6B shows a through-focus character chart image 600-2 for a conventional monofocal IOL as shown in through-focus energy line diagram 501. The five chart images in Figure 6B (chart image 612-far, chart image 614-far-mid, chart image 616-mid, chart image 618-mid-near, and chart image 620-near) correspond to the defocus distances in Table 1. Chart image 600-2 shows that while far image 612 has monofocal quality, it does not maintain depth of focus, in stark contrast to chart image 600-1.

[0033] Referring now to FIG. 7A, an FDoF bifocal diffractive microstructure 700 is shown in cross section. The FDoF bifocal diffractive microstructure 700 extends across the photopic aperture 202 to exhibit FDoF characteristics and extends beyond the photopic aperture 202 to the intermediate adaptation aperture 204 to exhibit bifocal characteristics. The FDoF bifocal diffractive microstructure 700 may provide FDoF photopic vision as illustrated in FIG. 4A or 4B, and intermediate adaptation vision as bifocal. The phase perturbation beyond the photopic aperture 202 takes the form of a bifocal design. The step height, step width, and phase values ​​of the bifocal design may be optimized for a desired through-focus energy distribution by design methods and procedures described in detail below.

[0034] Referring now to Figure 7B, Figure 7B shows a through-focus energy diagram 701 versus depth of focus for an FDoF bifocal diffractive microstructure 700 (see Figure 7A). In diagram 701, photon energy is plotted against defocus depth to show how the photon energy is distributed over far and near distances. In particular, it can be seen that diagram 701 shows the corresponding intermediate accommodation performance of the particular phase perturbation shown in Figure 7A. In diagram 701, two foci (one for far vision and one for near vision) can be distinguished by the depth of focus, and the correlation with bifocal lenses is clear.

[0035] Referring now to Figure 8A, Figure 8A shows a mid-adaptation aperture through-focus character chart image 800-1 for an FDoF bifocal diffractive microstructure 700 as shown in through-focus energy line diagram 701. The five chart images in Figure 8A (chart image 802-far, chart image 804-far-middle, chart image 806-middle, chart image 808-middle-near, and chart image 810-near) correspond to the defocus distances in Table 1. Chart image 800-1 illustrates the mid-adaptation imaging effect in that both far image 802 and near image 810 have high quality, while intermediate images at different levels of depth of focus also exhibit different qualities.

[0036] Referring now to Figure 8B, Figure 8B shows a through-focus character chart image 800-2 for a conventional bifocal IOL as shown in through-focus energy line diagram 701. The five chart images in Figure 8B (chart image 812-far, chart image 814-far-mid, chart image 816-mid, chart image 818-mid-near, and chart image 820-near) correspond to the defocus distances in Table 1. Chart image 800-2 shows that both far-distance image 812 and near-distance image 820 have high quality, while the mid-distance images at various levels of depth of focus have poorer quality than chart image 800-1.

[0037] Referring now to FIG. 9A , an FDoF trifocal diffractive microstructure 900 is shown in cross section. The FDoF trifocal diffractive microstructure 900 extends across the photopic aperture 202 to exhibit FDoF characteristics and extends beyond the photopic aperture 202 to the intermediate adaptation aperture 204 to exhibit trifocal characteristics. The FDoF trifocal diffractive microstructure 900 may provide FDoF photopic vision as illustrated in FIG. 4A or 4B , and intermediate adaptation vision as trifocal. The phase perturbation beyond the photopic aperture 202 takes the form of a trifocal design. The step height, step width, and phase values ​​of the trifocal design may be optimized for a desired through-focus energy distribution by design methods and procedures described in detail below.

[0038] Referring now to Figure 9B, Figure 9B shows a through-focus energy line diagram 901 versus depth of focus for an FDoF trifocal diffractive microstructure 900 (see Figure 9A). In line diagram 901, photon energy is plotted against defocus depth to show how photon energy is distributed from far to near distances. In particular, line diagram 901 can be seen to show the corresponding intermediate accommodation performance of the particular phase perturbation shown in Figure 9A. In line diagram 901, three foci (a focus for far vision, a focus for intermediate vision, and a focus for near vision) can be distinguished by their depth of focus, and the correlation with trifocal lenses is clear.

[0039] Referring now to FIG. 10A , FIG. 10A shows a mid-adaptation aperture, through-focus character chart image 1000-1 for an FDoF trifocal diffractive microstructure 900 as shown in a through-focus energy line diagram 901. The five chart images in FIG. 10A (chart image 1002-far, chart image 1004-far-middle, chart image 1006-middle, chart image 1008-middle-near, and chart image 1010-near) correspond to the defocus distances in Table 1, respectively. Chart image 1000-1 shows the mid-adaptation imaging effect, with far image 1002, mid-distance image 1006, and near image 1010 having good or high quality, while still providing continuous image quality for the other intermediate images at various levels of depth of focus.

[0040] Referring now to Figure 10B, Figure 10B shows a through-focus character chart image 1000-2 for a conventional trifocal IOL as shown in through-focus energy line diagram 901. The five chart images in Figure 10B (chart image 1012-far, chart image 1014-far-middle, chart image 1016-middle, chart image 1018-middle-near, and chart image 1020-near) correspond to the defocus distances in Table 1. Chart image 1000-2 shows an intermediate accommodation imaging effect, with far distance image 1012, intermediate distance image 1016, and near distance image 1020 having good or high quality.

[0041] The photopic FDoF microstructure 500 shown in FIG. 5A , the FDoF bifocal diffractive microstructure 700 shown in FIG. 7A , and the FDoF trifocal diffractive microstructure 900 shown in FIG. 9A may all be designed according to the following methods and procedures. Photopic microstructures, such as the FDoF photopic microstructure 500, may be defined by a step pattern. The step pattern may be characterized by a number of parameters, including, for example, a number of steps, step heights, step widths, and phase values. Photopic microstructures may be designed using a variety of numbers of steps. For example, the FDoF photopic microstructure 500 is shown in FIG. 5A using six steps. However, photopic microstructures may be designed using more or fewer than six steps. Furthermore, other step parameters may be selected to alter the through-focus photopic aperture performance of the ophthalmic lens.

[0042] Once the photopic microstructures are selected, the photopic microstructures may be optimized. For example, any suitable optical design software program (e.g., ZEMAX optical design software) may be used to simulate the performance of the photopic microstructures. During this optimization process, the through-focus photopic aperture performance corresponding to the photopic microstructures may be calculated. Furthermore, a reference through-focus photopic aperture performance may be determined and may represent the objective or target performance sought through the design and optimization process. For example, the reference through-focus photopic aperture performance may be a distance-primary performance or a near-primary performance. The through-focus photopic aperture performance of the photopic microstructures may be compared to the reference through-focus photopic aperture performance. If the first through-focus aperture performance does not sufficiently approximate the reference through-focus photopic aperture performance, the step parameters of the photopic microstructures may be adjusted.

[0043] Once the step parameters are adjusted, a second through-focus photopic aperture performance corresponding to the adjusted photopic microstructure may be calculated. This second through-focus photopic aperture performance may then be compared to the reference through-focus photopic aperture performance. If the second through-focus photopic aperture performance sufficiently approximates the reference through-focus photopic aperture performance, the adjusted photopic microstructure may be selected and implemented during the manufacturing and formation of the ophthalmic lens. However, if the second through-focus photopic aperture performance does not sufficiently approximate the reference through-focus photopic aperture performance, the step parameters of the adjusted photopic microstructure may be adjusted again. In some cases, the first through-focus photopic aperture performance may more closely approximate the reference through-focus photopic aperture performance than the second through-focus photopic aperture performance. In this case, the step parameters of the adjusted photopic microstructure may be adjusted accordingly. This process may be repeated as many times as necessary to provide a photopic microstructure having a through-focus photopic aperture performance sufficiently approximates the reference through-focus photopic aperture performance. Finally, during the manufacturing and formation of an ophthalmic lens, a photopic microstructure may be selected and implemented that has a through-focus photopic aperture performance that most closely approximates the reference through-focus photopic aperture performance.

[0044] Intermediate accommodation microstructures, such as the FDoF bifocal diffractive microstructure 700 at an intermediate accommodation aperture shown in FIG. 7A and the FDoF trifocal diffractive microstructure 900 at an intermediate accommodation aperture shown in FIG. 9A , may be defined by a step pattern. This step pattern may be characterized by a number of parameters, including, for example, a number of steps, step heights, step widths, and phase values. The intermediate accommodation microstructures may be designed to provide various types of through-focus intermediate accommodation aperture performance. For example, the FDoF bifocal diffractive microstructure 700 may be designed to approximate the performance of a bifocal through-focus intermediate accommodation aperture, and the FDoF trifocal diffractive microstructure 900 may be designed to approximate the performance of a trifocal through-focus intermediate accommodation aperture. However, by selecting various step parameters, the intermediate accommodation microstructures may also be designed to approximate other through-focus intermediate accommodation aperture performances.

[0045] Once the intermediate adapting microstructure is selected, the intermediate adapting microstructure may be optimized. For example, any suitable optical design software program (e.g., ZEMAX optical design software) may be used to simulate the intermediate adapting microstructure. During this optimization process, the through-focus intermediate adapting aperture performance corresponding to the intermediate adapting microstructure may be calculated. Furthermore, a reference through-focus intermediate adapting aperture performance may be determined and may represent the objective or target performance sought through the design and optimization process. For example, the reference through-focus intermediate adapting aperture performance may be bifocal or trifocal performance, as described above. The through-focus intermediate adapting aperture performance of the intermediate adapting microstructure may be compared to the reference through-focus intermediate adapting aperture performance. If the first through-focus intermediate adapting aperture performance does not sufficiently approximate the reference through-focus intermediate adapting aperture performance, the step parameters of the intermediate adapting microstructure may be adjusted.

[0046] Once the step parameters are adjusted, a second through-focus intermediate accommodation aperture performance corresponding to the adjusted intermediate accommodation microstructure may be calculated. This second through-focus intermediate accommodation aperture performance may then be compared to the reference through-focus intermediate accommodation aperture performance. If the second through-focus intermediate accommodation aperture performance sufficiently approximates the reference through-focus intermediate accommodation aperture performance, the adjusted intermediate accommodation microstructure may be selected and implemented during the manufacturing and formation of the ophthalmic lens. However, if the second through-focus intermediate accommodation aperture performance does not sufficiently approximate the reference through-focus intermediate accommodation aperture performance, the step parameters of the adjusted intermediate accommodation microstructure may be adjusted again. In some cases, the first through-focus intermediate accommodation aperture performance may more closely approximate the reference through-focus intermediate accommodation aperture performance than the second through-focus intermediate accommodation aperture performance. In this case, the step parameters of the adjusted intermediate accommodation microstructure may be adjusted accordingly. This process may be repeated as many times as necessary to provide an intermediate accommodation microstructure having a through-focus intermediate accommodation aperture performance sufficiently approximates the reference through-focus intermediate accommodation aperture performance. Finally, during the manufacturing and formation of an ophthalmic lens, an intermediate accommodation microstructure may be selected and implemented that has a through-focus intermediate accommodation aperture performance that most closely approximates the reference through-focus intermediate accommodation aperture performance.

[0047] Once both the photopic microstructures and the intermediate adapting microstructures are selected, an ophthalmic lens may be formed and manufactured using the selected adapting microstructures in the photopic aperture of the ophthalmic lens and the selected intermediate adapting microstructures in the intermediate adapting aperture of the ophthalmic lens. The ophthalmic lens may provide presbyopia-correcting full depth of focus vision.

[0048] As disclosed herein, full depth of focus IOLs include diffractive structures formed on the surface of the IOL optic that extend depth of focus to improve photopic and intermediate adapting vision.

[0049] The subject matter of the foregoing disclosure should be considered as illustrative and not limiting, and the appended claims are intended to cover all such modifications, improvements, and other embodiments that fall within the true spirit and scope of the present disclosure. Accordingly, to the maximum extent permitted by law, the scope of the present disclosure should be determined by the broadest permissible interpretation of the following claims and their equivalents, and should not be restricted or limited by the above detailed description. The present disclosure also includes the following aspects. [Aspect 1] anterior and posterior surfaces, at least one of the anterior and posterior surfaces including a first surface area corresponding to a photopic aperture of a pupil and a second surface area corresponding to a difference between the photopic aperture and a neutral aperture of the pupil; a first microstructure pattern formed on the first surface region, the first microstructure pattern introducing a phase perturbation into the optical path of incident light to provide full depth of focus for photopic vision; 1. An ophthalmic lens comprising: [Aspect 2] 10. The ophthalmic lens of claim 1, wherein the second surface region has refractive power and provides monofocal vision at the intermediate accommodation aperture. Aspect 3 10. The ophthalmic lens of claim 1, further comprising a second microstructure pattern formed on the second surface region, the second microstructure pattern configured to provide bifocal vision at the intermediate accommodation aperture. Aspect 4 10. The ophthalmic lens of claim 1, further comprising a second microstructure pattern formed on the second surface region, the second microstructure pattern configured to provide trifocal vision at the intermediate accommodation aperture. Aspect 5 2. The ophthalmic lens of claim 1, wherein the first microstructure pattern is defined by a step pattern. Aspect 6 6. The ophthalmic lens of claim 5, wherein the step pattern is defined by a step height, a step width, and a phase value. Aspect 7 a first microstructure pattern that extends the depth of focus of visible light along the optical axis of the intraocular lens, the first microstructure pattern being formed in a first surface region of the optical zone corresponding to the photopic aperture of the pupil; an intraocular lens comprising: Aspect 8 The intraocular lens of aspect 7 further comprises a second surface region of the optical zone corresponding to the difference between the light-adapting aperture and the intermediate-adapting aperture of the pupil, the second surface region having a refractive power. Aspect 9 An intraocular lens as described in aspect 7, further comprising a second microstructure pattern formed in a second surface region of the optical zone corresponding to the difference between the light-adapting aperture and the intermediate-adapting aperture of the pupil, the second microstructure pattern comprising a bifocal diffractive structure. Aspect 10 An intraocular lens as described in aspect 7, further comprising a second microstructure pattern formed in a second surface region of the optical zone corresponding to the difference between the light-adapting aperture and the intermediate-adapting aperture of the pupil, the second microstructure pattern comprising a trifocal diffractive structure. Aspect 11 An intraocular lens as described in aspect 7, further comprising a second microstructure pattern formed on a second surface region of the optical zone corresponding to the difference between the light-adapting aperture and the intermediate-adapting aperture of the pupil, the first microstructure pattern being defined by a first step pattern and the second microstructure pattern being defined by a second step pattern. Aspect 12 the first step pattern is defined by a first step height, a first step width, and a first phase value; 12. The ophthalmic lens of claim 11, wherein the second step pattern is defined by a second step height, a second step width, and a second phase value.

Claims

1. anterior and posterior surfaces, at least one of the anterior and posterior surfaces including a first surface area corresponding to a photopic aperture of a pupil and a second surface area corresponding to a difference between the photopic aperture and a neutral aperture of the pupil; a first microstructure pattern formed on the first surface region, the first microstructure pattern introducing a phase perturbation into an optical path of incident light to extend a depth of focus for photopic vision; a second microstructure pattern formed on the second surface region; the first and second microstructure patterns are defined by step patterns, the second microstructure pattern is configured to provide bifocal vision at the intermediate accommodation aperture; The step pattern is defined by a step height, a step width, and a phase value. Ophthalmic lenses.

2. A front and rear surface, at least one of said front and rear surfaces including a first surface area corresponding to the photopic aperture of a pupil and a second surface area corresponding to the difference between said photopic aperture and intermediate adapting aperture of said pupil; a first microstructure pattern formed on the first surface region, the first microstructure pattern introducing a phase perturbation into an optical path of incident light to extend a depth of focus for photopic vision; a second microstructure pattern formed on the second surface region; the first and second microstructure patterns are defined by step patterns, the second microstructure pattern is configured to provide trifocal vision at the intermediate accommodation aperture; The step pattern is defined by a step height, a step width, and a phase value. Ophthalmic lenses.

3. a first microstructure pattern that introduces a phase perturbation into the optical path of incident light to extend the depth of focus of visible light along an optical axis of the intraocular lens, the first microstructure pattern being formed in a first surface region of the optical zone corresponding to the photopic aperture of the pupil; a second microstructure pattern formed on a second surface area of ​​the optical zone corresponding to a difference between the photopic and intermediate adapting apertures of the pupil; Including, the first microstructure pattern is defined by a first step pattern, and the second microstructure pattern is defined by a second step pattern; the second microstructure pattern includes a bifocal diffractive structure; the first step pattern is defined by a first step height, a first step width, and a first phase value; the second step pattern is defined by a second step height, a second step width, and a second phase value; Intraocular lens.

4. A first microstructure pattern that introduces a phase perturbation into the optical path of incident light so as to expand the focal depth of visible light along the optical axis of the intraocular lens, the first microstructure pattern being formed on a first surface region of an optical zone corresponding to the photopic aperture of the pupil; a second microstructure pattern formed on a second surface area of ​​the optical zone corresponding to a difference between the photopic and intermediate adapting apertures of the pupil; Including, the first microstructure pattern is defined by a first step pattern, and the second microstructure pattern is defined by a second step pattern; the second microstructure pattern includes a trifocal diffractive structure; the first step pattern is defined by a first step height, a first step width, and a first phase value; the second step pattern is defined by a second step height, a second step width, and a second phase value; Intraocular lens.

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