Ophthalmic lenses and methods with phase-shifting structures

Abstract

An ophthalmic lens includes an optical device having a first surface, a second surface, and a phase-shifting structure having one or more phase-shifting regions. A method for manufacturing an ophthalmic lens includes designing an optical device having a first surface, a second surface, and a phase-shifting structure having one or more phase-shifting regions. The phase-shifting regions can be adapted to produce a corresponding focal chromatic shift, such that incident radiation in a corresponding wavelength range converges at least partially toward a corresponding selected wavelength. The method includes determining a chromatic aberration target for the optical device and determining the number of phase-shifting regions that satisfy the chromatic aberration target. The optical device is formed with phase-shifting regions having a corresponding optimal height obtained in part based on overall interaction effects. The phase-shifting structure can be adapted to increase the depth of focus of the optical device in an extending direction.

Description

Technical Field

[0001] This disclosure relates to an ophthalmic lens having a phase-shifting structure and a method for manufacturing the ophthalmic lens. Background Technology

[0002] Humans have five basic senses: sight, hearing, smell, taste, and touch. Vision gives us the ability to visualize the world around us and connect us to our environment. Many people worldwide suffer from vision problems and require ophthalmic lenses. Ophthalmic lenses can be worn in front of the eyes, for example, in the form of contact lenses and eyeglasses. For instance, in cataract surgery, ophthalmic lenses can be implanted in the eye to replace the clouded lens. The optical performance of ophthalmic lenses can be adversely affected by certain types of aberrations. Summary of the Invention

[0003] A method for manufacturing ophthalmic lenses is disclosed herein. The method includes designing a phase-shifting structure having one or more phase-shifting regions on a first surface for use in optics, the first surface being at least one of a front surface and a rear surface. The one or more phase-shifting regions are adjusted to produce a corresponding focal chromatic shift, such that incident radiation in a corresponding wavelength range converges at least partially toward a focal position of a corresponding selected wavelength.

[0004] The method includes determining a chromatic aberration target for an optics device and selecting the number of one or more phase-shift regions that satisfy the chromatic aberration target, partly based on the corresponding initial step heights of one or more phase-shift regions. The method also includes determining the overall interaction effect of each initial step height and determining the corresponding optimal height of one or more phase-shift regions, partly based on the overall interaction effect. The optics device is formed with one or more phase-shift regions having corresponding optimal heights.

[0005] Before determining the overall interaction effect, the corresponding initial step height can be limited to a minimum to a maximum parameter. The minimum parameter can be -10 micrometers. The maximum parameter can be +10 micrometers. The optics can be formed from a crosslinked copolymer of 2-phenylethyl acrylate and 2-phenylethyl methacrylate. The human eye typically exhibits chromatic aberration of approximately 1.5 diopters in the visible light range between approximately 450 nm and 650 nm. The chromatic aberration target can be set in the range of -0.5 to 1.5 diopters, corresponding to chromatic aberration corrections from 0 to -2.0 diopters. The chromatic aberration target is the resulting value, and the chromatic aberration correction is the compensation added to obtain the resulting value. The corresponding selected wavelengths can include a first selected wavelength of approximately 550 nm. The corresponding selected wavelengths can include a second selected wavelength at or approximately 650 nm and a third selected wavelength at or approximately 450 nm.

[0006] Forming an optical device with a phase-shifting structure may include forming an internal refractive region defining a first nominal optical power and an external refractive region defining a second nominal optical power. The internal refractive region extends from an internal boundary, and the external refractive region extends from an external boundary. A phase-shifting structure is positioned between the internal and external refractive regions, extending from the internal boundary to the external boundary. The method further includes arranging one or more phase-shifting regions in the extending direction, the phase-shifting structure being adapted to increase the depth of focus of the optical device in the extending direction.

[0007] This document discloses an ophthalmic lens with an optical element having a first surface and a second surface disposed around an optical axis. At least one of the first and second surfaces includes an internal refractive region defining a first nominal power and an external refractive region defining a second nominal power. The internal refractive region extends from an internal boundary, and the external refractive region extends from an external boundary. A phase-shifting structure is located between the internal and external refractive regions, extending from the internal boundary to the external boundary. The phase-shifting structure includes one or more phase-shifting regions defining corresponding optimal heights. The one or more phase-shifting regions are adapted to produce corresponding focal chromatic shifts such that incident radiation within a corresponding wavelength range converges at least partially toward a focal position of a corresponding selected wavelength. The phase-shifting structure is adapted to satisfy chromatic aberration targets for the optical element.

[0008] The corresponding optimal height can be based in part on the corresponding initial step height of one or more phase-shift regions and the overall interaction effect of the corresponding initial step height. The optics can be an artificial lens. The optics can be a contact lens. For incident radiation extending in the wavelength range of approximately 450 nm to approximately 650 nm, the corresponding focal chromatic shift can extend between approximately -0.5 and 1.5 diopters.

[0009] This document discloses an ophthalmic lens with an optics device having a first surface and a second surface disposed around an optical axis. At least one of the first and second surfaces includes an internal refractive region defining a first nominal power and an external refractive region defining a second nominal power. The internal refractive region extends from an internal boundary, and the external refractive region extends from an external boundary. A phase-shifting structure is positioned between the internal and external refractive regions, extending from the internal boundary to the external boundary. The phase-shifting structure includes one or more phase-shifting regions defining corresponding optimal heights. The one or more phase-shifting regions are arranged in an extending direction. The phase-shifting structure is adapted to increase the depth of focus of the optics in the extending direction. The depth of focus of the optics in the extending direction can be selected to be in the range of about 0.75 diopters to about 3.0 diopters.

[0010] The foregoing features and advantages, as well as other features and advantages, of this disclosure will become apparent when taken in conjunction with the accompanying drawings from the following detailed description of the best mode for carrying out this disclosure. Attached Figure Description

[0011] Figure 1 This is a schematic cross-sectional view of an ophthalmic lens with a phase-shifting structure having one or more phase-shifting regions;

[0012] Figure 2 yes Figure 1 A schematic top view of the ophthalmic lens shown;

[0013] Figure 3 This is a schematic diagram illustrating the effect of a single phase shift region of an example lens on the modulation transfer function graph;

[0014] Figure 4A This is a schematic diagram showing the modulation transfer function curve of a phase shift structure combining two phase shift steps;

[0015] Figure 4B This is a schematic diagram showing the modulation transfer function of the phase shift structure in a lens with a bifocal region;

[0016] Figure 5 This is a schematic diagram showing the focal shift in an exemplary ophthalmic lens for incident radiation of different wavelengths;

[0017] Figure 6 This is a schematic diagram of a system with a controller adapted to perform operations for manufacturing. Figure 1 Methods for using ophthalmic lenses;

[0018] Figure 7 It is used for manufacturing Figure 1 A schematic flowchart of the method for making ophthalmic lenses;

[0019] Figure 8 It shows the incident on Figure 1 A schematic diagram of the extension of the depth of focus of the wavefront on the surface of an ophthalmic lens;

[0020] Figure 9 It is possible Figure 1 A schematic diagram of the example basic profile used in the phase-shifting structure;

[0021] Figures 10-12 It is possible Figure 1 Schematic diagrams of various example auxiliary profiles used in the phase-shifting structure;

[0022] Figure 13 It is possible to be Figure 1 A schematic flowchart of the method executed by the controller. Detailed Implementation

[0023] Referring to the accompanying drawings, similar reference numerals denote similar parts. Figure 1 An ophthalmic lens 10 is schematically shown, comprising an optical element 12 having a first surface 14 and a second surface 16 disposed around an optical axis 18. The first surface 14 may be an anterior or posterior surface. Conversely, the second surface 16 may be a posterior or anterior surface. The ophthalmic lens 10 may be an intraocular lens, a contact lens, a spectacle lens, or other type of corrective lens.

[0024] Figure 2 This is a schematic top view of the spectacle lens 10. (Refer to...) Figures 1-2 The spectacle lens 10 includes an internal refractive region 20 defining a first nominal power and an external refractive region 22 defining a second nominal power. In one example, the first nominal power and the second nominal power are the same. In another example, the first nominal power and the second nominal power are different. (See reference...) Figure 2 The internal refractive region 20 extends from the center of the optical device 12 to the internal boundary 24, while the external refractive region 22 extends from the external boundary 26 to the outer surface 28 of the optical device 12.

[0025] refer to Figures 1-2 The phase-shifting structure 30 is located between the inner refractive region 20 and the outer refractive region 22, and extends from the inner boundary 24 to the outer boundary 26. (Reference) Figure 2 The phase-shifting structure 30 includes one or more phase-shifting regions 32 (hereinafter referred to as "one or more"), each of which may define its own initial step height. The phase-shifting regions 32 may be separated by one or more flat regions 36.

[0026] The refractive power of the lens in the human eye varies as a function of the wavelength of incident radiation. The human eye has approximately -1.2 diopters of astigmatism for blue wavelengths (0.45 micrometers) and approximately 0.3 diopters of astigmatism for red wavelengths (0.65 micrometers). Due to longitudinal chromatic aberration in the human eye, the blue, green, and red components of light are separated along the visual axis. Chromatic aberration can extend by approximately 1.5 diopters in the wavelength range of 450 nm to 650 nm. This reduces the image quality observed by the human eye. As described below, the ophthalmic lens 10 utilizes a phase-shifting structure 30 to reduce chromatic aberration and improve visual quality. More specifically, the ophthalmic lens 10 is optimized to meet chromatic aberration targets. Additionally, the ophthalmic lens 10 can utilize the phase-shifting structure 30 to increase the depth of focus.

[0027] Reference Figure 2In the example shown, the phase-shifting region 32 includes a first phase-shifting region 32A and a second phase-shifting region 32B. However, it should be understood that the number of phase-shifting regions 32 can vary depending on the application at hand. The change in the propagation speed of the incident radiation I through the optical device 12 introduces a phase shift into the wave field. This phase shift is proportional to the length of the path traversed by the incident radiation I. (Reference) Figure 2 First phase shift region 32A (see Figure 1 The first phase shift region 32B can be adapted to produce a respective focal color shift such that incident radiation I in the first wavelength range converges at least partially toward the focal position of the first selected wavelength. The second phase shift region 32B can be adapted to produce a corresponding focal color shift such that incident radiation I in the second wavelength range converges at least partially toward the focal position of the second selected wavelength. In one example, for incident radiation I extending in the wavelength range of about 450 nm to about 650 nm, the corresponding focal color shift extends between about -0.5 and 1.5 diopters.

[0028] Figure 3 This is a schematic diagram illustrating the effect of a single phase-shift region on the modulation transfer function of a hypothetical lens. Figure 3 Figure 40 shows the peak (vertical axis) of the modulation transfer function without the phase shift structure 30. The modulation transfer function is formally defined as the amplitude (absolute value) of the complex optical transfer function, which specifies how the optical system handles different spatial frequencies. Figure 3 The horizontal axis in the figure shows the distance D along the optical axis 18. Graph 40 shows a first curve 42, a second curve 44, and a third curve 46, representing the first wavelength, the second wavelength, and the third wavelength, respectively. In one example, the first wavelength, the second wavelength, and the third wavelength are 450 nm, 550 nm, and 650 nm, respectively.

[0029] Due to the influence of chromatic aberration, the peaks of the first curve 42, the second curve 44, and the third curve 46 are separated along the optical axis 18, which reduces visual quality. As shown in graph 40, the maximum values ​​or peaks of the first curve 42, the second curve 44, and the third curve 46 are located at distances D1, D2, and D3 along the optical axis 18, respectively. The phase shift region 32 shifts the first curve 42 towards the second curve 44 along direction 43 and shifts the third curve 46 towards the second curve 44 along direction 45, thereby effectively reducing chromatic aberration in the eye when the ophthalmic lens 10 is placed in front of or implanted in the eye. Figure 3 The curves in graph 50 show the final effect of the phase shift using the first curve 52, the second curve 54, and the third curve 56. As shown in graph 50, the corresponding peaks of the first curve 52 and the third curve 56 are shifted from distances D1 and D3, respectively.

[0030] Figure 4AThis is a schematic diagram illustrating the modulation transfer function curves of a phase-shifted structure with two phase-shifted regions. In some embodiments, the incorporation of a phase-shifted structure with two phase-shifted regions, in contrast to a single phase-shifted region, can allow for greater convergence of peaks corresponding to incident radiation at different wavelengths. Figure 4A Section 60 shows an exemplary modulation transfer function (MTF) graph of an ophthalmic lens 10 with a two-step phase-shift structure 30. Without phase shift, the corresponding peaks of the first curve 62, the second curve 64, and the third curve 66 are located at distances D1, D2, and D3 along the optical axis 18, respectively. As shown in section 60, the depth of focus is extended using a two-step phase-shift design; the peak of the first curve 62 shifts towards the peak of the second curve 64, thereby extending the depth of focus. Using the same optimal step, the peak of the third curve 66 shifts towards the peak of the second curve 64. In other words, the focal position defined by wavelengths within the range between the wavelengths of the first curve 62 and the third curve 66 converges at least partially to the focal position defined by the wavelength of the second curve 64 (here referred to as the first selected wavelength). The first selected wavelength may be equal to or below a first threshold. For example, the first threshold may be 550 nm. Alternatively or additionally, the focal position defined by the wavelengths of the first curve 62 and the third curve 66 may converge at least partially to one or more other focal positions.

[0031] In some other embodiments, the ophthalmic lens 10 may be configured to utilize the phase-shifting structure 30 to reduce chromatic aberration in bifocal or multifocal applications. For example, see reference... Figure 4B In some embodiments, the ophthalmic lens 10 can provide bifocal correction with two independent focal areas, such as Figure 4B Parts 60 and 70 are shown. In part 60, the peaks of the first curve 62 and the third curve 66 shift towards the peak of the second curve 64, respectively. Bifocal correction can be refractive or diffractive. (Reference) Figure 4B In part 70, the phase shift structure 30 can be configured to shift the peak of the first curve 72 from a distance D4 (along the optical axis 18) toward the second curve 74 at a distance D5. The peak of the third curve 76 is shifted from a distance D6 toward the second curve 74 at a distance D5. In other words, the focal position defined by the wavelength range between the fourth wavelength (of the first curve 72) and the sixth wavelength (of the third curve 76) converges at least partially toward the focal position defined by the wavelength of the second curve 74.

[0032] Different phase shifts result in different defocus optical performance. (Refer to...) Figure 5 The curve 100 in the figure shows the defocusing relationship between different phase shifts. Figure 5 The Y-axis in the figure depicts the modulation transfer function (MTF), which reflects the amplitude of the transmission of incident radiation I. Figure 5The X-axis depicts the focal shift, or distance from the retina. Trace 102 shows the MTF at zero step height. Reference Figure 5 Traces 104, 106, 108, 110, 112, 114, 116, and 118 show the corresponding MTFs for step heights of +0.2, -0.2, +0.44, -0.44, +0.5, -0.5, +0.75, and -0.75 wavelengths, respectively. Traces 102 can be used as a reference point for the phase-shifted region with a step height of zero wavelength. Figure 5 As shown, increasing the absolute value of the step height results in a greater amount of focus shift. Furthermore, the corresponding traces of positive and negative phase shifts turn in opposite directions. It is important to note that changing the step height in the phase shift region will have different effects on the color characteristics of light at different wavelengths.

[0033] Reference Figure 7 It shows the manufacturing process. Figure 1 The flowchart of method 200 for ophthalmic lens 10 is provided. Diffraction-based depth-of-focus extension techniques rely on additional power used to extend the focal point; however, excessive additional power can lead to discontinuous clinical defocus performance. Chromatic aberration compensation provided by diffraction techniques also depends on diffraction-based additional power, making it difficult to customize color characteristics for each wavelength. Method 200 enables customization of lens pleochroism performance, color correction / compensation profile, and depth-of-focus extension.

[0034] Method 200 can be combined with Figure 6 The system 150 shown is used and executed by it. (See reference...) Figure 6 System 150 includes a controller C having at least one processor P and at least one memory M (or a non-transitory tangible computer-readable storage medium) on which instructions for performing at least a portion of method 200 can be recorded. Memory M may store a set of controller-executable instructions, and processor P may execute the set of controller-executable instructions stored in memory M. Instructions executed by processor P cause controller C to perform method 200 as described below.

[0035] refer to Figure 7 Method 200 does not need to be applied in the specific order described herein, and some boxes may be omitted. (Following...) Figure 7 In block 202, method 200 includes designing a phase-shifting structure 30 having one or more phase-shifting regions 32 for a first surface 14 of the optics 12 (see [link]). Figures 1-2 The first surface 14 is at least one of the front surface and the rear surface. The phase shift region 32 can define a corresponding initial step height and is adapted to generate a corresponding focal color shift.

[0036] according to Figure 7In box 204, method 200 includes determining a chromatic aberration target for optics 12. In one example, the chromatic aberration target is set to be in the range of -0.5 diopters to +1.5 diopters. Assuming that a typical human eye naturally has a chromatic aberration of +1.5 diopters in the wavelength range between approximately 450 nm and 650 nm, then the chromatic aberration correction could be 0.0 diopters in the case of a +1.5 diopters chromatic aberration target, and -2.0 diopters in the case of a -0.5 diopters chromatic aberration target. Note that the chromatic aberration target is the resulting value, and the chromatic aberration correction is the compensation added to obtain the resulting value. Reference Figure 6 System 150 may include a user interface 152 for collecting user data (e.g., patient color difference targets) from one or more clinical facilities or electronic medical record units. System 150 may include a data management unit 154 for storing and / or facilitating the transmission of user data and other functions. Various components of system 150 may be configured to communicate via a short-range network 156 and / or a long-range network 158. (Reference) Figure 6 The controller C can communicate with a remote server 160 and / or a cloud unit 162, which may include one or more servers hosted on the Internet to store, manage, and process data. The cloud unit 162 may be a private or public source of information maintained by an organization such as a research institute, company, university, and / or hospital.

[0037] refer to Figure 6 The short-range network 156 can be a bus implemented in various ways, such as a serial communication bus in the form of a local area network (LAN). The LAN can include, but is not limited to, a Controller Area Network (CAN), a Controller Area Network with Flexible Data Rates (CAN-FD), Ethernet, Bluetooth, Wi-Fi, and other forms of data connection. The long-range network 158 can be a wireless local area network (LAN) that links multiple devices using a wireless distribution method, a wireless metropolitan area network (MAN) that connects several wireless LANs, or a wireless wide area network (WAN) that covers a large area such as neighboring towns and cities. Other types of connections can be used.

[0038] according to Figure 7 Box 206 selects the number or quantity of phase-shifted regions 32 that satisfy the chromatic aberration target based on the corresponding initial step height of the phase-shifted regions 32. Table I shows the initial step height in wave (unbounded wave or unwrapped wave) for incident radiation I characterized by the following wavelengths: 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, and 0.70 micrometers. The first row indicates the wavelength of the radiation. Each subsequent row shows the equivalent step height value in wave. The first column shows the initial step height in micrometers.

[0039] Table I

[0040]

[0041]

[0042] System 10 is configured to simultaneously optimize depth of focus and color performance by selecting one or more optimal physical step heights for the phase shift design of one or more steps. For a physical step height, the corresponding optical path difference (a key optical parameter) differs for different wavelengths when expressed in waves. Therefore, its depth of focus and color characteristics differ for different wavelengths. The physical step height can be calculated as: Physical Step Height = Step Height in Waves × Wavelength / (Refractive Index of IOL Material - Refractive Index of Aqueous Solution). Referring to row 2 of Table I, for a physical step height of -5.04 micrometers, the equivalent step height in waves for light with a wavelength of 0.55 micrometers is -2.00 waves. This assumes the corresponding refractive indices of the IOL material and aqueous solution are 1.5542 and 1.336, respectively. Therefore, the physical height is: [-2.00 waves × 0.55 micrometers / (1.5542 - 1.336)] = -5.04 micrometers. Similarly, for a step size of -5.04 micrometers, the equivalent step height is -1.69 waves for light with a wavelength of 0.65 micrometers and -2.44 waves for light with a wavelength of 0.45 micrometers.

[0043] To optimize the process, the corresponding initial step height of phase-shift region 32 can be constrained or wrapped within minimum and maximum parameters. Wrapping helps save computation time and yields better optimization. Modeling complex optical systems is challenging. By tabulating the chromaticity characteristics of the phase shift within the minimum and maximum ranges, wrapping significantly improves the modeling and optimization process. Table II below shows the bounded step height in waves (derived from Table I), defined between the maximum and minimum parameters. In this example, the minimum parameter is set to -0.5 wavelength units, and the maximum parameter is set to +0.5 wavelength units. This constraint can be achieved using the following mathematical function:

[0044] Bounded stair height = Unbounded stair height - [Unbounded stair height rounded to the nearest integer]

[0045] For example, comparing row 1 of Table I with row 1 of Table II, an unbounded step height of -2.75 waves results in a bounded step height of +0.25 waves, both at a wavelength of 0.4 micrometers.

[0046] Table II

[0047]

[0048]

[0049] As described above, system 10 and the associated method can be configured to simultaneously optimize the depth of focus extension and chromatic aberration reduction of a given lens by combining one or more phase-shift regions with defined physical step heights. However, also as previously stated, the effect of the physical step height of the phase-shift region on incident light is a function of a specific wavelength of light. Therefore, selecting a specific step height can cause light falling within a first specific wavelength range to be deflected along the optical axis differently from light falling within a second specific wavelength range. Thus, by manipulating the number of phase-shift regions and the physical step height of each of those phase-shift regions in a consistent manner, the total depth of focus of a given lens can be extended while also reducing the amount of dispersion along the optical axis across the visual spectrum.

[0050] For example, the human eye has approximately -1.2 diopters of astigmatism for blue wavelengths (0.45 μm) and approximately 0.3 diopters of astigmatism for red wavelengths (0.65 μm). Therefore, the total chromatic aberration from 0.45 μm to 0.65 μm is 1.5 diopters. Referring to Table III below (same as row 2 of Table II), if a physical step height of -5.04 μm is chosen, which corresponds to the zero-wavelength step height for light with a wavelength of 0.55 μm, the corresponding step height is -0.44 wavelength at 0.45 μm and 0.31 wavelength at 0.65 μm. Therefore, although light with a wavelength of 0.55 μm may not be deflected along the optical axis, light with wavelengths of 0.45 μm and 0.65 μm is expected to be deflected along the optical axis, more specifically, converging towards light with a wavelength of 0.55 μm, thereby reducing the total chromatic aberration. In this specific example, chromatic aberration corrections of approximately 0.3 diopters and 0.2 diopters can be achieved for light with wavelengths of 0.45 micrometers and 0.65 micrometers, respectively, which can be determined by calculations performed using commercially available optical modeling software. Therefore, this would reduce the longitudinal chromatic aberration of the human eye by approximately 0.5 diopters. Furthermore, to aid in illustrating this specific example, as shown in [the image / reference]... Figure 5 Approximately visible, trace 110 (representing the MTF at a step height of -0.44 waves at a wavelength of 0.45 micrometers) is offset along the optical axis by about 0.1 mm, which corresponds to about 0.3 diopter. Similarly, corresponding to Figure 5 The trajectory somewhere between 104 and 108, the step height of 0.31 waves at a wavelength of 0.65 micrometers is offset by less than about 0.1 mm in the opposite direction along the optical axis, which corresponds to about 0.2 diopters. Figure 3 The optical effects of this exemplary embodiment are generally illustrated in the text.

[0051] Table III

[0052]

[0053] As mentioned above, Figure 3 Graph 40 shows curves 42, 44, and 46, representing the first, second, and third wavelengths without phase-shifting structure 30, respectively. For example, the first, second, and third wavelengths could be 450 nm, 550 nm, and 650 nm (corresponding to Table III). Due to chromatic aberration, the peaks of curves 42, 44, and 46 are separated along the optical axis 18. The phase-shifting step of phase-shifting structure 30 causes curve 42 to shift towards curve 44 in direction 43 and curve 46 to shift towards curve 44 in direction 45, effectively reducing chromatic aberration in the eye by approximately 0.5 diopters. Figure 3 The curve 50 shows the final effect of the phase shift, where the corresponding peaks of the first curve 52 and the third curve 56 converge toward the second curve 54, thereby reducing longitudinal chromatic aberration and improving visual quality.

[0054] In one example, according to block 204 of method 200, the chromatic aberration target can be set to 0.7 diopters, and the controller C can be configured to select two as the number or quantity of phase shift regions 32 to be employed, according to block 206 of method 200. Here, the following pairs of initial phase shift regions can result in a cumulative correction of 0.7: (+1.0, -0.3), (+0.5, +0.2), (+0.3, +0.4). In each of these examples, these pairs are summed to a total correction. Other combinations may be used.

[0055] according to Figure 7In block 208, method 200 further includes determining the overall interaction effect of the phase-shift region 32, such as the optical interaction of light affected by one or more phase-shift regions 32 and the resulting effect on light at specific wavelengths (e.g., a first wavelength of 450 nm, a second wavelength of 550 nm, and a third wavelength of 650 nm). To determine the overall interaction effect, controller C can be configured to employ an optical model of the eye available to those skilled in the art. For example, controller C can perform optical modeling analysis to determine how an optical design with phase-shift regions 32 will meet the desired target amount of chromatic aberration correction and overall depth of focus extension. Such optical modeling can be performed using optical design software available to those skilled in the art (e.g., software provided by ZEMAX). The optical model can have varying anatomical precision, including single, three, and four refractive surface variants. The optical model can incorporate features such as aspherical, tilted and eccentric, wavelength-dependent media, and curved retina. The optical model can be based on demographic averages and is adapted to take into account age, sex, ethnicity, and other factors. When ocular biostatistics and other specific data are available, the optical model can be customized for a specific patient. Alternatively, in order to determine the overall interaction effect, the controller C may be configured to perform a finite element analysis (FEA) simulation using software available to those skilled in the art.

[0056] according to Figure 7 According to block 210, method 200 further includes determining the corresponding optimal height of the phase-shift region 32 via controller C, partially based on the overall interaction effect. For example, based on initial chromatic aberration correction and / or depth-of-focus extension performance determined by optical modeling, iterative modifications to the number and / or step height of the phase-shift region 32 can be made to optimize optical performance (e.g., chromatic aberration correction and / or depth-of-focus extension). Furthermore, according to block 210, the optics 12 forms a phase-shift region 32 with a corresponding optimal height. (Refer to...) Figure 1 and Figure 2 The optical device 12 having a phase-shifting structure 30 may include forming an internal refractive region 20 defining a first nominal optical power and an external refractive region 22 defining a second nominal optical power, the internal refractive region 20 extending from an internal boundary 24 and the external refractive region 22 extending from an external boundary 26. The phase-shifting structure 30 may be located between the internal refractive region 20 and the external refractive region 22, extending from the internal boundary 24 to the external boundary 26. The optical device 12 may be formed from suitable materials available to those skilled in the art. In one example, the optical device 12 is formed from a crosslinked copolymer of 2-phenylethyl acrylate and 2-phenylethyl methacrylate.

[0057] Figure 1The ophthalmic lens 10 can be configured to enhance depth of focus along a target direction by arranging the depth of focus generated by a plurality of phase-shift regions 32 in the extension direction, while also providing a target amount of chromatic aberration correction. In other words, depth of focus extension works in conjunction with chromatic aberration correction. (Reference) Figure 8 Figure 250 shows the first wavefront 252 focused at the retinal position L1. Depending on whether the phase shift is ahead or behind the wavefront, the direction of the phase shift can be used to control the depth of focus extension before or after the retinal position L1. After the initial phase shift, a second wavefront 254 is generated, which shifts the light energy to a second position L2. The second position L2 is located in front of the retinal position L1, thus increasing the visual extension to intermediate and near vision.

[0058] refer to Figure 8 Figure 270 illustrates the effect of multiple phase steps arranged in the extension direction for an ophthalmic lens 10 having two phase shift regions 32. The first wavefront 272 is focused at the retinal position L1. This initial phase shift produces a second wavefront 274, which deflects light energy to a second position L2 in front of the retinal position L1. The additional phase shift results in a third wavefront 276 focused at a third position L3, thereby extending the depth of focus in region 280.

[0059] Figures 1-2 The outline of the ophthalmic lens 10 can be derived from the basic outline (P) base ) and auxiliary contours (P aux The superposition of ) is used to characterize or limit, such that: P sag =[P base +P aux Here, P sag The sag of the surface of the ophthalmic lens 10 is expressed as a function of the radial distance from the optical axis 18. Figure 9 An example of the base profile 300 of the lens 10 is shown. The base profile 300 can be spherical or aspherical. The base profile 300 can be toric to reduce corneal astigmatism. The shape of the base profile 300 can be chosen based on the application at hand.

[0060] Now for reference Figures 10-12 Various examples of auxiliary profiles relative to the optical axis 18 between the inner refractive region 20 and the outer refractive region 22 are shown for the phase-shifting structure 30. (See reference...) Figure 10 The first auxiliary profile 310 provides a phase shift structure 30 that increases linearly from the inner refractive region 20 to the outer refractive region 22. The first auxiliary profile 310 includes a first phase shift region 312 and a second phase shift region 314 separated by a first platform 316. The first phase shift region 312 and the second phase shift region 314 define a first step height S1 and a second step height S2, respectively. (Reference) Figure 10The first phase-shifting region 312 extends between a first radial distance R1 and a second radial distance R2 from the optical axis 18. The second phase-shifting region 314 extends between a third radial distance R3 and a fourth radial distance R4 from the optical axis 18.

[0061] Reference Figure 11 The second auxiliary profile 340 includes a first phase-shift region 342 and a second phase-shift region 344 separated by a first platform 346. The second auxiliary profile 340 also includes a third phase-shift region 348, which is spaced apart from the second phase-shift region 344 by a second platform 350. (See reference...) Figure 11 The first phase shift region 342 and the second phase shift region 344 extend in the same direction. The third phase shift region 348 extends in the opposite direction. Including multiple steps with optimized height increases the range and flexibility for targeting desired color performance.

[0062] Reference Figure 12 The third auxiliary profile 370 includes a first phase-shift region 372 and a second phase-shift region 374 separated by a first platform 376. The third auxiliary profile 370 also includes a third phase-shift region 378, which is spaced apart from the second phase-shift region 374 by a second platform 380. (See reference...) Figure 12 The second phase shift region 374 and the third phase shift region 378 extend in the same direction. The first phase shift region 372 extends in the opposite direction. The directionality of the multiple steps allows for flexibility in achieving desired color performance.

[0063] In some embodiments, the number of phase-shift steps and the optimal step height are determined by satisfying both focus color shift and depth-of-focus extension objectives. Figure 13 As shown in the flowchart of method 400, implementation of this embodiment can begin with an initial set of parameters targeting a desired focus color shift, desired depth of focus extension, or free parameters. In one example, following box 402, an initial design with free parameters (number of steps and step height) is selected. The number of steps and step height can be iteratively adjusted (as shown in line 403) until a final design that satisfies the targets for focus color shift and depth of focus extension is achieved, as shown in box 404. In another example, according to... Figure 13In box 406, select an initial design with parameters (number of steps and step height) that satisfy the target focus color shift. To satisfy the depth-of-focus extension target, more steps can be added and all step heights can be adjusted accordingly until the final design that satisfies both focus color shift and depth-of-focus extension targets is achieved, as per box 404. In another example, according to box 408, select an initial design with parameters (number of steps and step height) that satisfy the target depth-of-focus extension. To satisfy the focus color shift target, more steps can be added and all step heights can be adjusted until the final design that satisfies both focus color shift and depth-of-focus extension targets is achieved, as per box 404.

[0064] In summary, for reference Figure 1 The phase-shifting region 32 is adapted to produce a corresponding focal chromatic shift, such that incident radiation I within the corresponding wavelength range converges at least partially toward the focal position of the corresponding selected wavelength. One or more phase-shifting regions 32 with optimized heights alter the pleochroic properties and depth-of-focus performance of the ophthalmic lens 10. The optimal heights of the respective phase-shifting regions are based in part on the corresponding initial step heights of the phase-shifting regions 32 and the overall interaction effect taking into account the interactions between the corresponding initial step heights.

[0065] Figure 6 The controller C includes computer-readable media (also known as processor-readable media), including non-transitory (e.g., tangible) media that participate in providing data (e.g., instructions) that can be read by a computer (e.g., by the computer's processor). Such media can take many forms, including but not limited to non-volatile and volatile media. Non-volatile media can include, for example, optical discs or magnetic disks and other permanent storage. Volatile media can include, for example, dynamic random access memory (DRAM), which can constitute main memory. These instructions can be transmitted by one or more transmission media, including coaxial cables, copper wires, and optical fibers, including lines containing a system bus coupled to the computer processor. Some forms of computer-readable media include, for example, floppy disks, floppy disks, hard disks, magnetic tape, other magnetic media, CD-ROMs, DVDs, other optical media, punched cards, paper tape, other physical media with a perforated pattern, RAM, PROM, EPROM, FLASH-EEPROM, other memory chips or cartridges, or other media from which a computer can read them.

[0066] The lookup tables, databases, data repositories, or other data stores described herein can include various mechanisms for storing, accessing, and retrieving various types of data, including hierarchical databases, a set of files in a file system, application databases in proprietary formats, relational database management systems (RDBMS), etc. Each such data store can be contained within a computing device employing one of the computer operating systems mentioned above, and can be accessed via a network in one or more of various ways. File systems can be accessed from the computer operating system and can include files stored in various formats. In addition to languages ​​used for creating, storing, editing, and executing stored routines, RDBMS can employ a structured query language (SQL), such as the PL / SQL language described above.

[0067] The detailed description and accompanying drawings support and describe this disclosure, but the scope of this disclosure is defined only by the claims. While some best modes and other embodiments for carrying out the claimed disclosure have been described in detail, various alternative designs and embodiments exist for practicing the disclosure as defined in the appended claims. Furthermore, the features of the embodiments shown in the drawings or the various embodiments mentioned in this specification are not necessarily to be construed as embodiments independent of each other. Rather, each feature described in one of the examples of embodiments may be combined with one or more other desired features from other embodiments to obtain other embodiments not described in words or by reference to the drawings. Therefore, these other embodiments fall within the framework of the appended claims.

Claims

1. A method for manufacturing ophthalmic lenses, the method comprising: Design a phase-shifting structure having one or more phase-shifting regions on a first surface for use in an optical device, wherein the first surface is at least one of a front surface and a rear surface; The depth of focus extension of the optics in each wavelength range is optimized by adjusting the one or more phase shift regions to produce a corresponding focal color shift, such that incident radiation in the corresponding wavelength range converges at least partially toward the focal position of the corresponding selected wavelength, and the one or more phase shift regions define a corresponding initial step height. A chromatic aberration target is determined for the optical device, the chromatic aberration target being in the range from -0.5 diopters to 1.5 diopters, and the chromatic aberration target corresponding to the chromatic aberration of the patient's eye added to the chromatic aberration correction; Based on the initial step heights of the one or more phase shift regions, select the number of one or more phase shift regions that satisfy the color difference target; The overall interaction effect of the selected phase shift region is determined by optical modeling using a model eye, relative to the chromatic aberration target. The corresponding adjusted physical step heights of the one or more phase-shift regions are determined in part based on the overall interaction effect, wherein iterative modifications to the step heights are performed through optical modeling to determine the adjusted physical step heights to provide the chromatic aberration correction required to meet the chromatic aberration target and the depth of focus extension; as well as An optical device is formed having one or more phase-shift regions, the one or more phase-shift regions having corresponding adjusted physical step heights.

2. The method according to claim 1, further comprising: Before determining the overall interaction effect, the corresponding initial step height is limited to the range of minimum and maximum parameters.

3. The method according to claim 2, further comprising: The minimum parameter is set to -10 micrometers; as well as Set the maximum parameter to positive 10 micrometers.

4. The method according to claim 1, further comprising: Optical devices are formed from crosslinked copolymers of 2-phenylethyl acrylate and 2-phenylethyl methacrylate.

5. The method of claim 1, wherein the corresponding selected wavelength includes a first selected wavelength, the method further comprising: The first selected wavelength is set to approximately 550 nm.

6. The method according to claim 1, wherein, The optical device having the phase-shift structure comprises: Forming an internal refractive region defining a first nominal optical power and an external refractive region defining a second nominal optical power, wherein the internal refractive region extends from an internal boundary and the external refractive region extends from an external boundary; and The phase-shifting structure is positioned between the inner refractive region and the outer refractive region, and the phase-shifting structure extends from the inner boundary to the outer boundary.

7. The method according to claim 1, further comprising: The one or more phase-shifting regions are arranged in the extending direction, and the phase-shifting structure is adapted to increase the depth of focus of the optical device in the extending direction.

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