A fitting method for astigmatism contact lens sets, including apodized monofocal lenses for lower cylindrical error correction and toric lenses for higher cylindrical error, as well as related astigmatism lens sets.

Abstract

A fitting method for a contact lens set for astigmatism, including an apodized monofocal lens for lower cylindrical error correction and a toric lens for higher cylindrical error correction, and related contact lens sets for astigmatism. Astigmatic eyes with a cylindrical error greater than a higher specified cylindrical error label power (e.g., >1.25 diopters (D)) may be fitted with a non-apodized toric lens with a stabilization mechanism. However, astigmatic eyes with a cylindrical error up to a higher specified cylindrical error label power (e.g., ≤1.25 diopters (D)) may be fitted with an apodized monofocal lens. Apodized monofocal lenses have an apodization profile that reduces aberrations and provides improved visual acuity, so that more astigmatic patients with higher cylindrical errors may find visual acuity with apodized monofocal lenses acceptable, and so that comfort resulting from the absence of a stabilization mechanism is improved.

Description

Technical Field

[0001] (Claim of Priority) This application claims the benefit of U.S. Provisional Patent Application No. 63 / 540,159, filed on September 25, 2023, entitled "FITTING METHODS FOR ASTIGMATIC CONTACT LENS SETS INCLUDING APODIZED SINGLE-VISION LENSES FOR LOWER CYLINDER ERROR CORRECTION AND TORIC LENSES FOR HIGHER CYLINDER ERROR, AND RELATED ASTIGMATIC LENS SETS", the disclosure of which is hereby incorporated herein by reference in its entirety.

[0002] (Field of the Invention) The present disclosure relates to the field of ophthalmic lenses for use with astigmatic patients. More specifically, the present disclosure is directed to systems of lenses including apodized lenses, and methods of prescribing the same for astigmatic patients.

Background Art

[0003] Common conditions leading to reduced visual acuity include myopia (i.e., a condition in which distant vision is poor) and hyperopia (i.e., a condition in which near vision is poor), and corrective lenses in the form of spectacles or hard or soft contact lenses are prescribed for myopia and hyperopia. These conditions are generally described as an imbalance between the length of the eye and the focal point of the optical components of the eye. A myopic eye focuses in front of the retinal plane, and a hyperopic eye focuses behind the retinal plane. Myopia typically develops because the axial length of the eye becomes longer than the focal length of the optical components of the eye, that is, the eye becomes too long. Hyperopia typically develops because the axial length of the eye is too short compared to the focal length of the optical components of the eye. Patients with these conditions can have their vision corrected with spherical contact lenses having appropriate lens spherical power.

[0004] Astigmatism is a visual impairment or refractive error in which the eye is unable to focus on a point object and produce a focused image on the retina, resulting in a blurred field of vision. Astigmatism is caused by the rotationally symmetric curvature of the refractive surfaces of the eye (including the cornea and lens). For example, Figure 1A shows an astigmatic eye 100 which includes a cornea 102 whose refractive surface is not rotationally symmetric, curving steeper in one direction than in another. In other words, one or more of the refractive surfaces of the cornea 102 are more curved or steeper on a principal meridian than on other orthogonal principal meridians, thereby having different amounts of refractive power and wavefront aberration along different meridians. As a result, the image 104 is stretched to two focal points 106 rather than being focused to a single point. The non-astigmatic eye 108 shown in Figure 1B has a cornea 110 with a rotationally symmetric refractive surface, thereby focusing the image 112 to a single point 114.

[0005] Corneal astigmatism can be corrected using hard or rigid gas-permeable contact lenses. In this case, a fluid or tear film lens may be present between the posterior surface of the rigid contact lens and the cornea. This fluid or tear film lens conforms to or takes the shape of the posterior surface of the contact lens. Because the refractive index of the fluid or tear film lens is nearly identical to that of the cornea, corneal toricity is optically neutralized or reduced. In these cases, toric lenses are generally not necessary. However, rigid gas-permeable contact lenses and hard contact lenses are generally less comfortable than soft or hydrogel contact lenses. Because soft or hydrogel contact lenses enclose the cornea, a fluid lens is usually not seen, and the tear fluid closely resembles a thin film. In this case, a toric lens design is necessary.

[0006] Toric lenses are optical elements that have two different powers with two orientations perpendicular to each other. Essentially, toric lenses have two spherical powers along orthogonal meridians to correct nearsightedness or farsightedness. These powers are produced with curvatures oriented at various angles that are maintained relative to the eye. Toric lenses can be used in eyeglasses, intraocular lenses, and contact lenses. Toric lenses used in eyeglasses and intraocular lenses are fixed to the eye by either an eyeglass frame or haptics, thereby always providing optimal visual correction. However, toric contact lenses tend to rotate on the eye, which may temporarily provide suboptimal correction of vision. Consequently, toric contact lenses also include mechanisms that stabilize the contact lens relative to the eye when the wearer blinks or looks around.

[0007] Maintaining the orientation of toric contact lenses on the eye is typically achieved by mechanical means. For example, "prism stabilization," which includes offsetting or tilting the front surface of the contact lens relative to the rear surface, thickening the lower peripheral portion of the contact lens, creating undulations on the surface of the contact lens, and trimming the edges of the contact lens, are all methods that are utilized.

[0008] Additionally, “static stabilization” has been used to stabilize contact lenses by utilizing thicker and thinner zones, or, in some cases, areas where the thickness of the contact lens increases or decreases at its periphery. Typically, the thicker or thinner zones are located at the periphery of the contact lens, symmetrically with respect to the vertical and / or horizontal axes. For example, each of two thicker or thinner zones may be positioned on either side of the optical zone and centered along the 0-180 degree axis of the contact lens, as shown, for example, in U.S. Patent No. 11,281,024. In another example, a single thicker zone may be designed at the bottom of the contact lens, providing a weighting effect similar to that of prism stabilization, but also incorporating an area where the thickness increases from top to bottom to stabilize the contact lens by utilizing the force of the upper eyelid. Note that prior art literature has used the term “dynamic stabilization” to mean what is referred to herein as static stabilization. The terms static and dynamic stabilization may be used interchangeably.

[0009] The challenges of stabilization zones in design or use are the trade-off between contact lens stability and comfort, and the physical constraints associated with increased thickness. The gradient of the stabilization zone is fixed in the contact lens. Modifying the design to improve the rotational speed of convergence, such as by increasing the surface gradient of the stabilization zone, can increase thickness and negatively impact comfort. Additionally, contact lenses must achieve two things: to rotate to the correct orientation upon insertion and to maintain that orientation throughout the wearing period. Conventional designs require a performance trade-off between these two requirements.

[0010] In patients with astigmatism, the greater the amount of cylindrical error correction required, the more sensitive the patient becomes to axial misalignment and rotational stability on the eye in terms of adverse effects on the wearer's visual acuity. See, for example, U.S. Patent No. 11,281,024. Therefore, higher cylindrical error correction requires a more robust stabilization mechanism in the lens design, which often requires a more prominent (thicker) stabilization zone. However, when the eyelid interacts with the mechanical stabilization features of the lens, such stabilization mechanisms may increase patient awareness. With lower cylindrical error correction, patients are less sensitive to axial rotational misalignment, so the lens stabilization design can be less noticeable, thereby allowing the patient to tolerate a higher level of misalignment before visual acuity is adversely affected.

[0011] Currently, some ophthalmologists are attempting to fit patients with low cylindrical power (typically ≤0.75 diopters (D) of cylindrical power) to spherical lenses instead of toric lenses by placing them in "equivalent spherical power" lenses. Equivalent spherical power lenses are intended to give the closest estimate of the prescription without including the cylindrical power for cylindrical error correction. These patients are prescribed spherical power lenses, in which case the spherical power value is derived by considering the actual spherical power correction need and adding a number equal to half the actual cylindrical power need to it. Because these patients are not properly corrected for either the actual spherical or cylindrical power need, visual acuity will inevitably decrease by a clinically significant degree (e.g., >0.5 lines - 10 log minimum angle of resolution (MAR)) when using equivalent spherical power lenses compared to when using the best toric lenses. However, the advantage of equivalent spherical power lenses for wearers compared to toric lenses is that spherical lenses are typically less expensive and more comfortable than toric lenses.

[0012] In addition to the myopia or hyperopia conditions mentioned above, the human visual system often has higher-order aberrations that interfere with accurate focusing on the image point, resulting in blurred images and reduced retinal image quality. These higher-order aberrations can include spherical aberration, coma, and trefoil. Spherical aberration (SPHA) occurs when the focal point changes with increasing radius from the lens center, resulting in reduced image contrast and decreased visual acuity. For example, Figure 2 shows the average ocular SPHA (D / mm²) of a patient's eye as a function of diopters (SKU(D)) compared to the typical spherical lens SPHA (SKU(D)) of curve 204. 2 Graph 200 shows an example of this in curve 202. As shown in Graph 200 in Figure 2, at -3D, the average ocular SPHA of the patient's eye in curve 202 cancels out with the lens SPHA of curve 204. However, due to large deviations in ocular SPHA, most patients have residual SPHA in the eyepiece system. In addition to SPHA and astigmatism, other aberrations, including HOA and slight misfocus aberrations (e.g., less than 0.25D), can also contribute to the deterioration of the patient's retinal image quality. All of these residual aberrations (including astigmatism, SPHA, slight misfocus, HOA, etc.) result in a lower root mean square (RMS) in the central region than in the peripheral region. Therefore, the overall wavefront RMS is reduced by masking the peripheral region.

[0013] Spherical aberration, caused by the difference in curvature of two different meridians, may be more pronounced in toric meridians in uncorrected astigmatists (e.g., when an astigmatist wears an equivalent spherical power lens) than in myopia or hyperopia. Residual aberrations (including astigmatism, spherical aberration, and focus shift) have wavefronts with lower RMS in the central region than in the peripheral region.

[0014] Overall, the wavefront RMS of contact lens wearers with these aberrations can be reduced by "masking" the peripheral region of the lens, which is also called "apodization." "Masking" or "apodizing" refers to the manipulation of the percentage of light transmission through the lens relative to radial positions from the central axis. Depending on the design intent, the apodization profile of a lens can take different forms, such as a Gaussian or non-Gaussian profile with or without a central region of 100% transmission, and a profile that extends to the edge of the optical zone or to the edge of the lens.

[0015] The benefits of apodization can include an increase in the Modular Transfer Function (MTF) for lower spatial frequencies of interest. Gradual changes in the apodized transmission profile can reduce the effects of diffraction at the pupillary rim and / or the effects of higher-order aberrations, all of which can lead to an improvement in overall visual performance. [Overview of the Initiative] [Means for solving the problem]

[0016] Embodiments disclosed herein include a fitting method for a contact lens set for astigmatism, which includes apodized monofocal lenses for lower cylindrical error correction and toric lenses for higher cylindrical error correction. Related contact lens sets for astigmatism are disclosed. In exemplary embodiments, a contact lens set for astigmatism is provided, which includes a first subset (i.e., one or more) of lenses, which are apodized monofocal lenses available in different formulations having spherical powers and apodization profiles for refractive error correction. The contact lens set also includes a second subset (i.e., one or more) of lenses, which are non-apodized toric lenses available in different formulations having spherical powers for refractive error correction and cylindrical powers for cylindrical error correction. Patients with astigmatism can be fitted to lenses from the monofocal and toric lenses in the first and second subsets of the contact lens set, depending on the refractive error correction and cylindrical error correction prescriptions.

[0017] In exemplary embodiments, an apodized monofocal lens from a first subset of lenses in a contact lens set is provided for use in the astigmatic eyes of patients with a lower cylindrical error (e.g., ≤1.25 diopters (D)) that is less than the specified cylindrical error label power of the contact lens set. A non-apodized toric lens from a second subset of lenses in the contact lens set is provided for use in the astigmatic eyes of patients with a higher cylindrical error (e.g., >1.25 diopters (D)) that is greater than the specified cylindrical error label power of the contact lens set. The apodized monofocal lens in the contact lens set is an apodized lens that includes an apodization profile that reduces or masks transmitted light through the peripheral region of the spherical lens to reduce the patient's effective pupil size. This has the effect of reducing the overall wavefront aberration of the lens wearer wearing such apodized monofocal lens, improving visual acuity in astigmatism patients with minimal or no trade-off in visual acuity (VA) for patients with a specified cylindrical error label power or lower. For example, a contact lens set including an apodized monofocal lens for correcting the visual acuity of astigmatism eyes with cylindrical error correction up to 1.25 diopters (D) as a specified cylindrical error label power, with minimal or no trade-off in VA, has been developed as disclosed herein. Thus, more patients with astigmatism eyes with cylindrical errors up to a specified cylindrical error label power may be able to wear an apodized monofocal lens from a contact lens set that provides an acceptable VA for astigmatism patients and offers improved comfort. This can avoid or reduce the need for astigmatism patients with cylindrical errors up to a specified cylindrical label power to wear toric lenses, which may be undesirable due to being less comfortable (e.g., due to their stabilization mechanism) and / or more expensive.

[0018] Therefore, in the disclosed contact lens set, if a patient with astigmatism has an astigmatic eye with a cylindrical error correction smaller than the specified cylindrical error (e.g., ≤1.25D), the astigmatic eye may be fitted with an apodized monofocal lens from a first subset of lenses that is more comfortable to wear and can provide visual acuity with minimal or no trade-offs in VA. This makes it possible for more patients with astigmatic eyes with cylindrical errors up to a higher value than the specified cylindrical error label power to be fitted with an apodized monofocal lens from a contact lens set that can provide the patient with an acceptable VA and improved comfort. However, if a patient with astigmatism has an astigmatic eye that prefers toric lenses and / or has a cylindrical error correction larger than the specified cylindrical error label power of the contact lens set (e.g., >1.25D), the astigmatic eye may be fitted with a toric lens from a second subset of lenses that has refractive error correction label powers and cylindrical error label powers corresponding to the astigmatic eye's correction needs.

[0019] In one exemplary embodiment, if an astigmatic eye is determined to have a cylindrical error correction smaller than a specified cylindrical error label power, then the astigmatic eye may be fitted with an apodized monofocal lens as an equivalent spherical power lens. An equivalent spherical power lens is a monofocal lens having a spherical power based on both the refractive error correction and the cylindrical error correction of the astigmatic eye. For example, an equivalent spherical power lens may have a spherical power based on averaging the sum of the refractive error correction and the cylindrical error correction. An equivalent spherical power lens is intended to give the closest estimate of the astigmatic eye prescription without including the cylindrical power for cylindrical error correction.

[0020] In another exemplary embodiment, if an astigmatic eye is determined to have a cylindrical error correction smaller than a specified cylindrical error label power, the astigmatic eye may be fitted with an apodized monofocal lens having a refractive error correction label power corresponding to the actual refractive error correction of the astigmatic eye. An apodized monofocal lens having an apodization profile can reduce aberrations across the wearer's wavefront, thereby allowing a monofocal lens having a refractive error correction label power corresponding to the refractive error correction of the astigmatic eye to be fitted to the astigmatic eye and still provide sufficient refractive error correction to achieve acceptable or improved visual acuity.

[0021] In another exemplary embodiment, a method is provided for fitting contact lenses in a set of contact lenses for a patient with astigmatism, wherein each of the lenses has a spherical power for substantially correcting a refractive error corresponding to an intrinsic refractive error label power. The method includes determining the refractive error correction and cylindrical error correction for the astigmatic eye of the contact lens wearer, based on the refractive error and cylindrical error in the astigmatic eye. In response to determining that the cylindrical error correction for the astigmatic eye is ≤1.25D, the method includes selecting a first lens to fit the astigmatic eye from a first subset of lenses, having a refractive error label power associated with the determined refractive error correction. In response to determining that the cylindrical error correction for the astigmatic eye is >1.25D, the method includes selecting a second lens to fit the astigmatic eye from a second subset of lenses, having a refractive error label power corresponding to the determined refractive error correction and a cylindrical error label power corresponding to the determined cylindrical error correction. The first subset of lenses includes, each, a monofocal lens further having an apodization profile. The second subset of lenses includes, each, an unapodized toric lens further having a cylindrical power that substantially corrects the cylindrical error corresponding to an intrinsic cylindrical error label power of >1.25 diopters (D).

[0022] In another exemplary aspect, a contact lens set for correcting vision in an astigmatic eye of a contact lens wearer is provided. The contact lens set includes a plurality of lenses, each having a spherical power that substantially corrects a refractive error corresponding to a unique refractive error label power. Lenses of a first subset of the plurality of lenses each have a first optical zone having a first central axis and a first radius extending from the first central axis to a first lens edge, and each include a single-focus lens further having an apodization profile. Lenses of a second subset of the plurality of lenses each include a non-apodized toric lens further having a cylindrical power that substantially corrects a cylindrical error corresponding to a unique cylindrical error label power of >1.25 diopters (D). The apodization profile in each lens of the first subset of lenses includes a first transmission zone that allows 100% transmission up to a first radius of about 0.7897 millimeters (mm) from the first central axis, and a second transmission zone having a transmission of less than 100%, such transmission decreasing as a function of increasing first radius.

[0023] Additional features and advantages are set forth in the following detailed description, and in part will be readily apparent to those skilled in the art from that description, or will be recognized by practicing the aspects described in the present specification and claims, as well as the accompanying drawings.

[0024] It should be understood that both the foregoing general description and the following detailed description are merely exemplary, and are intended to provide an overview or framework for understanding the nature and characteristics of the claimed subject matter.

[0025] The accompanying drawings are included to provide a further understanding, and are incorporated in and constitute a part of this specification. The drawings illustrate one or more aspects, and together with the description serve to explain the principles and operations of various aspects. [Brief Description of the Drawings]

[0026] The above and other features and advantages of the present disclosure will become apparent from the following more specific description of the aspects of the present disclosure, as illustrated in the accompanying drawings. [Figure 1A] These are schematic diagrams of an astigmatic eye and a normal eye, respectively. [Figure 1B] These are schematic diagrams of an astigmatic eye and a normal eye, respectively. [Figure 2] This is a graph illustrating an exemplary ocular spherical aberration (SPHA) of an average eye as a function of diopters (D), compared with the conventional SPHA of a spherical lens. [Figure 3] This is a graph illustrating an exemplary simulation of visual acuity (VA) of an astigmatic eye wearing a toric lens and wearing an equivalent spherical power lens, as a function of accommodation movement. [Figure 4] This is a diagram of an exemplary apodized monofocal lens that includes an exemplary non-Gaussian apodization transmission profile, which filters light transmission against the radius of the apodized monofocal lens and can be used as a spherical lens or an equivalent spherical power lens for astigmatic eyes to provide refractive error correction. [Figure 5A] This is a graph of an exemplary non-Gaussian apodization transmission profile that can be provided in the apodized monofocal lens of Figure 4. [Figure 5B] This is the formula for the non-Gaussian apodization transmission profile of Figure 5A, as a function of the radius of the apodized monofocal lens. [Figure 6A] This is a graph illustrating the exemplary VA of a similar monofocal lens without apodization, the apodized monofocal lens of Figure 4, and an exemplary non-apodization toric lens, all as a function of accommodation movement. [Figure 6B] This is a graph illustrating the exemplary VA of a similar monofocal lens without apodization, the apodized monofocal lens of Figure 4, and an exemplary non-apodization toric lens, all as a function of accommodation movement. [Figure 6C]This graph illustrates the exemplary VA of a similar monofocal lens without apodization, the apodized monofocal lens shown in Figure 4, and an exemplary non-apodized toric lens, all as functions of convergence motion. [Figure 6D] This graph illustrates the exemplary VA of a similar monofocal lens without apodization, the apodized monofocal lens shown in Figure 4, and an exemplary non-apodized toric lens, all as functions of convergence motion. [Figure 7A] (1) A table illustrating the exemplary difference in VA for astigmatic eyes with prescribed refractive error and cylindrical error when wearing an apodized monofocal lens (for example, the apodized monofocal lens in Figure 4) with an apodization profile having a spherical power corresponding to the equivalent spherical power for the prescribed refractive error, and (2) a table comparing this with wearing a toric lens without apodization that has spherical and cylindrical powers corresponding to the prescribed refractive error and cylindrical error. [Figure 7B] (1) A table illustrating the exemplary difference in VA for astigmatic eyes with prescribed refractive error and cylindrical error when wearing an apodized monofocal lens (for example, the apodized monofocal lens in Figure 4) with an apodization profile having a spherical power corresponding to the prescribed refractive error's spherical power, and (2) a table comparing this to wearing a toric lens without apodization that has spherical and cylindrical powers corresponding to the prescribed refractive error and cylindrical error. [Figure 8]An exemplary contact lens set used to correct the vision of patients with astigmatism, the contact lens set comprising: a first subset of lenses which are non-Gaussian apodized monofocal lenses, such as the apodized monofocal lens in Figure 4, having spherical power and a non-Gaussian apodization transmission profile, selected for astigmatic eyes having a cylindrical power greater than a specified cylindrical error label power; and a second subset of lenses which are non-apodized toric lenses having spherical power and cylindrical power, selected for astigmatic eyes having a cylindrical error greater than a specified cylindrical error label power. [Figure 9] This flowchart illustrates an exemplary fitting process for fitting lenses from a contact lens set to the astigmatic eye of a toric patient, based on the need for refractive error correction and cylindrical error correction, the contact lens set comprising: a first subset of lenses which are apodized monofocal lenses with spherical power and apodization profile selected for the astigmatic eye having a cylindrical error correction smaller than a specified cylindrical error label power; and a second subset of lenses which are non-apodized toric lenses which have spherical power to correct the refractive error of the astigmatic eye and cylindrical power larger than a specified cylindrical error label power to correct the cylindrical error. [Figure 10] This is a diagram of an exemplary apodized monofocal lens, including an exemplary Gaussian apodization transmission profile, which can be used as a spherical lens or equivalent spherical power lens for astigmatic eyes to filter light transmission relative to the radius of the spherical lens and provide refractive error correction. [Figure 11A] Figure 10 is a graph of another exemplary Gaussian apodization transmission profile having a central flat transmission zone, which can be provided in an apodized monofocal lens. [Figure 11B] Figure 11A shows the equation for the Gaussian apodization transmission profile as a function of the radius of the apodized single-focus lens. [Figure 12]This graph illustrates the exemplary VA of a similar monofocal lens without apodization, the apodized monofocal lens shown in Figure 10, and an exemplary non-apodized toric lens, all as functions of convergence motion. [Figure 13] An exemplary contact lens set used to correct the vision of patients with astigmatism, the contact lens set comprising: a first subset of lenses which are Gaussian apodized monofocal lenses, such as the Gaussian apodized monofocal lens in Figure 10, having a spherical power and a Gaussian apodization transmission profile, selected for astigmatic eyes having a cylindrical error correction smaller than a specified cylindrical error label power; and a second subset of lenses which are non-apodized toric lenses having a spherical power and a cylindrical power, selected for astigmatic eyes having a cylindrical error correction larger than a specified cylindrical error label power. [Modes for carrying out the invention]

[0027] Embodiments disclosed herein include a fitting method for a contact lens set for astigmatism, which includes apodized monofocal lenses for lower cylindrical error correction and toric lenses for higher cylindrical error correction. Related contact lens sets for astigmatism are disclosed. In exemplary embodiments, a contact lens set for astigmatism is provided, which includes a first subset (i.e., one or more) of lenses, which are apodized monofocal lenses available in different formulations having spherical powers and apodization profiles for refractive error correction. The contact lens set also includes a second subset (i.e., one or more) of lenses, which are non-apodized toric lenses available in different formulations having spherical powers for refractive error correction and cylindrical powers for cylindrical error correction. Patients with astigmatism can be fitted to lenses from the monofocal and toric lenses in the first and second subsets of the contact lens set, depending on the refractive error correction and cylindrical error correction prescriptions.

[0028] Figure 3 is a graph illustrating an exemplary simulation of visual acuity (VA) (in units of -10log minimum resolution angle (MAR)) of astigmatic eyes wearing toric lenses and equivalent spherical power lenses as a function of convergence motion. The VA performance curve 302 in Figure 3 is the averaged through-focus VA of 10 astigmatic patients with -3D refractive error correction and 0.75D cylindrical error correction. The VA performance curve 304 in Figure 3 is the VA performance of the same patient group wearing equivalent spherical power contact lenses. The equivalent spherical power as a spherical power value is derived by considering the patient's actual refractive power correction need and adding a number equal to the proportion of the patient's actual cylindrical power need (e.g., half). As shown in Figure 3, the VA performance curve 304 for toric patients wearing equivalent spherical power lenses is lower than the VA performance curve 302 for toric patients wearing toric lenses. This is because patients wearing equivalent spherical power lenses are not adequately corrected for their actual spherical or cylindrical power needs. Toric patients wearing equivalent spherical power lenses may inevitably experience a clinically significant decrease in visual acuity (VA) when wearing equivalent spherical power lenses compared to when wearing toric lenses (e.g., >0.5 line - 10 logMAR). However, the advantage for wearers of equivalent spherical power lenses compared to toric lenses is that spherical lenses are typically less expensive and more comfortable than toric lenses. The stabilization mechanisms incorporated into the peripheral lens region of toric lenses to maintain the correct orientation may reduce contact lens comfort.

[0029] In this regard, in exemplary embodiments, embodiments disclosed herein include an apodized monofocal lens from a first subset of lenses in a contact lens set, provided for use in the astigmatic eyes of patients having a lower cylindrical error (e.g., ≤1.25 diopters (D)) than the specified cylindrical error label power of the contact lens set. A non-apodized toric lens from a second subset of lenses in the contact lens set is provided for use in the astigmatic eyes of patients having a higher cylindrical error (e.g., >1.25 diopters (D)) than the specified cylindrical error label power of the contact lens set. The apodized monofocal lens in the contact lens set is an apodized lens that includes an apodization profile that reduces or masks transmitted light through the peripheral region of the spherical lens to reduce the patient's effective pupil size. This has the effect of reducing the overall wavefront aberration of the wearer wearing such apodized monofocal lens, improving visual acuity in astigmatist patients with minimal or no trade-off in VA for astigmatist patients with a specified cylindrical error label power or lower. For example, a contact lens set including an apodized monofocal lens for correcting the visual acuity of astigmatist eyes with cylindrical error correction up to 1.25 diopters (D) as a specified cylindrical error label power, with minimal or no trade-off in VA, has been developed as disclosed herein. Thus, more patients with astigmatist eyes with cylindrical errors up to a specified cylindrical error label power may be able to wear monofocal lenses from a contact lens set that provides an acceptable VA for astigmatist patients and offers improved comfort. This can avoid or reduce the need for astigmatist patients with cylindrical errors up to a specified cylindrical error label power to wear toric lenses, which may be less desirable due to being less comfortable (e.g., due to their stabilization mechanism) and / or being more expensive.

[0030] Therefore, in the contact lens sets disclosed herein, if a patient with astigmatism has an astigmatic eye with a cylindrical error correction smaller than a specified cylindrical error (e.g., ≤1.25D), the astigmatic eye may be fitted with an apodized monofocal lens from a first subset of lenses that is more comfortable to wear and can provide visual acuity with minimal or no trade-offs in VA. This makes it possible for more patients with astigmatic eyes with cylindrical errors up to a higher value than the specified cylindrical error label power to be fitted with monofocal lenses from a contact lens set that can provide the patient with an acceptable VA and improved comfort. However, if a patient with astigmatism has an astigmatic eye that prefers toric lenses and / or has a cylindrical error correction larger than the specified cylindrical error label power of the contact lens set (e.g., >1.25D), the astigmatic eye may be fitted with a toric lens from a second subset of lenses that has refractive error correction label powers and cylindrical error label powers corresponding to the astigmatic eye's correction needs.

[0031] In this regard, Figure 4 is a diagram of an exemplary apodized monofocal lens 400, which includes an exemplary apodization profile 402 having refractive error correction and being a non-Gaussian apodization transmission profile. The non-Gaussian apodized monofocal lens 400 is an example of an apodized monofocal lens that can be provided for use in the astigmatic eyes of patients having a lower cylindrical error (e.g., ≤1.25 diopters (D)) than the specified cylindrical error label power of the contact lens set. The non-Gaussian apodized monofocal lens 400 can be used as a spherical lens or equivalent spherical power lens for astigmatic eyes to provide refractive error correction. Either the front surface 404 or the rear surface 406 of the optical zone 408 of the non-Gaussian apodized monofocal lens 400 may have a spherical power to provide refractive error correction according to the spherical power profile provided in the non-Gaussian apodized monofocal lens 400.

[0032] As shown in Figure 4, the apodization profile 402 in the non-Gaussian apodized single-focus lens 400 filters the light transmission through the optical zone 408 of the non-Gaussian apodized single-focus lens 400 with respect to a radius r from the central axis C1 of the non-Gaussian apodized single-focus lens 400. In this example, the non-Gaussian apodization transmission profile 402 includes a first transmission zone 410(1) in the optical zone 408 between the central axis C1 and a second radius r2 of the optical zone 408, which is constant and has a flat top, in order to provide a constant 100% (or approximately 100%) transmission of light through the optical zone 408. For example, the first radius r1 may be about 0.7897 millimeters (mm). The non-Gaussian apodization transmission profile 402 also provides a second transmission zone 410(2) in optical zone 408 between a second radius r2 and a third radius r3 of optical zone 408, having a curvature profile that progressively reduces the transmission of light through the non-Gaussian apodized single-focus lens 400 as a function of the radius increasing toward the edge 412 of optical zone 408. The non-Gaussian apodization transmission profile 402 also provides a third transmission zone 410(3) in optical zone 408 between a third radius r3 and a fourth radius r4 (at the edge 412) of optical zone 408, having a curvature profile that progressively reduces the transmission of light through optical zone 408 to a fourth radius r4 of the non-Gaussian apodized single-focus lens 400.

[0033] Figure 5A is a transmission graph 500 of an exemplary non-Gaussian apodization transmission profile 502, which can be provided as an apodization profile 402 in the non-Gaussian apodized single-focus lens 400 of Figure 4. As shown in Figure 5A, the transmission graph 500 plots the percentage of light transmission as a function of radius r from the central axis C1. The non-Gaussian apodization transmission profile 502 includes a first transmission region 504(1) from the central axis C1 to a radius of 0.7897 mm, where 100% of the light is transmitted. The non-Gaussian apodization transmission profile 502 also includes a second transmission region 504(2) from the central axis C1 to a radius of 2.0 mm, where the percentage of light transmitted decreases as a function of radius up to 2.0 mm. The non-Gaussian apodization transmission profile 502 also includes a third transmission region 504(2) with a radius of 2.0 mm from the central axis C1, where the percentage of transmitted light is 0%. Figure 5B shows equation 510 for light transmission (T) as a function of radius (r) (T / r) for the exemplary non-Gaussian transmission apodization profile 502 of Figure 5A.

[0034] Non-apodized toric lenses from a second subset of lenses in a contact lens set are provided for use in the astigmatic eyes of patients with higher cylindrical error (e.g., >1.25 diopters (D)) greater than the specified cylindrical error label power of the contact lens set. The second subset of lenses may include one or more lenses for use in the astigmatic eyes of patients with higher cylindrical error greater than the specified cylindrical error label power of the contact lens set. Apodized monofocal lenses in a contact lens set are apodized lenses that include an apodization profile that reduces or masks transmitted light through the peripheral region of the spherical lens, thereby reducing the patient's effective pupil size. This reduces the overall wavefront aberration of the lens wearer wearing such an apodized monofocal lens and has the effect of improving the visual acuity of astigmatic patients with minimal or no trade-off in VA for astigmatic patients with a specified cylindrical error label power or lower. For example, a contact lens set including an apodized monofocal lens for correcting the visual acuity of astigmatic eyes with cylindrical error correction up to 1.25 diopters (D) as a specified cylindrical error label power, with minimal or no trade-offs in VA, has been developed as disclosed herein. Therefore, more patients with astigmatic eyes with higher cylindrical errors than a specified cylindrical error label power may be able to wear monofocal lenses from a contact lens set that provides an acceptable VA for astigmatic patients and offers improved comfort. This can avoid or reduce the need for astigmatic patients with cylindrical errors up to a specified cylindrical error label power to wear toric lenses, which may be less desirable due to being less comfortable (e.g., due to their stabilization mechanism) and / or more expensive.

[0035] Figures 6A to 6D are graphs 600A to 600D illustrating exemplary VA (-10logMAR) as a function of convergence motion (D) for a similar monofocal lens without apodization (VA_Base), a non-Gaussian apodized monofocal lens (e.g., non-Gaussian apodized monofocal lens 400 in Figure 4) (VA_Apod), and an exemplary non-apodized toric lens (VA_Max), respectively, for patient wearers with various cylindrical errors and cylindrical powers (in toric lenses).

[0036] Figure 6A shows graph 600A of the VA curve 602A for a patient with a cylindrical error of 1.0D wearing a monofocal lens without apodization (VA_BaseA), the VA curve 602B (VA_ApodA) for a patient wearing a non-Gaussian apodized monofocal lens (e.g., non-Gaussian apodized monofocal lens 400 in Figure 4), and the VA curve 602C (VA_MaxA) for a patient wearing a non-apodized toric lens with a cylindrical power of 0.75D, all as functions of convergence motion (D). As shown in Figure 6A, the non-apodized toric lens with a cylindrical power of 0.75D (VA_MaxA) shows a VA improvement of more than 0.5 lines compared to the monofocal lens without apodization (VA_BaseA). Therefore, VA can be improved by fitting a patient with a non-apodized toric lens with a cylindrical power of 0.75D (VA_maxA). However, as also shown in Figure 6A, a non-Gaussian apodized monofocal lens (e.g., a non-Gaussian apodized monofocal lens 400 in Figure 4) (VA_ApodA) offers an additional VA improvement compared to a non-apodized toric lens with a cylindrical power of 0.75D (VA_maxA). Thus, by fitting a patient with a cylindrical error of 0.75D with an apodized equivalent spherical power monofocal lens (VA_ApodA) (e.g., a non-Gaussian apodized monofocal lens 400 in Figure 4), the patient can enjoy not only an improved VA but also increased comfort compared to an unapodized toric lens with a cylindrical power of 0.75D that has a stabilizing mechanism (VA_max).

[0037] As previously discussed, apodized monofocal lenses, including an apodization profile, can reduce the effective pupil size of a patient by reducing or masking transmitted light through the peripheral region of the optical zone. This has the effect of improving visual acuity in astigmatized patients, reducing aberrations in the overall wavefront of the lens wearer wearing such an apodized monofocal lens, resulting in either minimal or no trade-off in VA for astigmatized patients with a cylindrical error of 0.75D.

[0038] Figure 6B shows graph 600B of the VA curves 604A for a patient-wearer with a cylindrical error of 1.0D wearing a non-apodized monofocal lens (VA_BaseB), VA curve 604B for a patient-wearer wearing a non-Gaussian apodized monofocal lens 400 (e.g., the non-Gaussian apodized monofocal lens 400 in Figure 4) (VA_ApodB), and VA curve 604C for a patient-wearer wearing a non-apodized toric lens with a cylindrical power of 0.75D (VA_maxB), all as functions of convergence motion (D). As shown in Figure 6B, the non-apodized toric lens with a cylindrical power of 0.75D (VA_maxB) shows a VA improvement of more than 0.5 lines compared to the non-apodized monofocal lens (VA_BaseB). Therefore, VA can be improved by fitting the patient with a non-apodized toric lens with a cylindrical power of 0.75D (VA_maxB). However, as also shown in Figure 6B, there is no VA improvement with a non-Gaussian apodized monofocal lens (e.g., a non-Gaussian apodized monofocal lens 400 in Figure 4) (VA_ApodB) compared to a non-apodized toric lens with a cylindrical power of 0.75D (VA_maxB), while the difference in VA between these lenses is less than 0.5 rows VA. Therefore, by fitting a non-Gaussian apodized monofocal lens (VA_ApodB) (e.g., a non-Gaussian apodized monofocal lens 400 in Figure 4) to a patient with a cylindrical error of 0.75D, the patient may enjoy increased comfort compared to an unapodized toric lens with a cylindrical power of 0.75D (VA_maxB) with a stabilizing mechanism, with very little or minimal trade-off in VA.

[0039] Figure 6C shows graph 600C of the VA curve 606A for a patient with a cylindrical error of 1.25D wearing a non-apodized monofocal lens (VA_BaseC), the VA curve 606B for a patient wearing a non-Gaussian apodized monofocal lens (e.g., non-Gaussian apodized monofocal lens 400 in Figure 4) (VA_ApodC), and the VA curve 606C for a patient wearing a non-apodized toric lens with a cylindrical power of 1.25D (VA_maxC), all as functions of convergence motion (D). As shown in Figure 6C, the non-apodized toric lens with a cylindrical power of 1.25D (VA_maxC) shows a VA improvement of more than 0.8 rows compared to the non-apodized monofocal lens (VA_BaseC). Therefore, VA can be improved by fitting the patient with a non-apodized toric lens with a cylindrical power of 1.25D (VA_maxC). However, as also shown in Figure 6C, there is no VA improvement with a non-Gaussian apodized monofocal lens (e.g., a non-Gaussian apodized monofocal lens 400 in Figure 4) (VA_ApodC) compared to a non-apodized toric lens with a cylindrical power of 1.25D (VA_maxC), while the difference in VA between these lenses is less than 0.5 rows of VA. Therefore, by fitting a non-Gaussian apodized monofocal lens (VA_ApodC) (e.g., a non-Gaussian apodized monofocal lens 400 in Figure 4) to a patient with a cylindrical error of 1.25D, the patient may enjoy increased comfort compared to an unapodized toric lens with a cylindrical power of 1.25D (VA_maxC) with a stabilizing mechanism, with very little or minimal trade-off in VA. Furthermore, implanting a non-Gaussian apodized monofocal lens (VA_ApodC) (e.g., non-Gaussian apodized monofocal lens 400 in Figure 4) in a patient with a cylindrical error of 1.25D can result in at least a 0.5 row VA improvement compared to a monofocal lens without apodization (VA_BaseC).

[0040] Figure 6D shows graph 600D of the VA curves 608A for a patient with a cylindrical error of 1.5D wearing a monofocal lens without apodization (VA_BaseC), VA curve 608B for a patient wearing a non-Gaussian apodized monofocal lens 400 (e.g., the non-Gaussian apodized monofocal lens 400 in Figure 4) (VA_ApodD), and VA curve 608C for a patient wearing a non-apodized toric lens with a cylindrical power of 1.25D (VA_maxD), all as functions of convergence motion (D). As shown in Figure 6D, the non-apodized toric lens with a cylindrical power of 1.25D (VA_maxD) shows a VA improvement of more than 0.5 rows compared to the monofocal lens without apodization (VA_BaseD). Therefore, VA can be improved by fitting the patient with a non-apodized toric lens with a cylindrical power of 1.25D (VA_maxD). However, as also shown in Figure 6D, there is no VA improvement with a non-Gaussian apodized monofocal lens (e.g., a non-Gaussian apodized monofocal lens 400 in Figure 4) (VA_ApodD) compared to a non-apodized toric lens with a cylindrical power of 1.25D (VA_maxD), while the difference in VA between these lenses is less than approximately 0.6 rows VA. Therefore, by fitting a patient with a cylindrical error of 1.5D with a non-Gaussian apodized monofocal lens (VA_ApodD) (e.g., a non-Gaussian apodized monofocal lens 400 in Figure 4), the patient may enjoy increased comfort compared to an unapodized toric lens (VA_maxC) with a cylindrical power of 1.25D and a stabilizing mechanism, with very little trade-off in VA (e.g., more than 0.5 rows). A decrease in VA beyond 0.5 rows may not be acceptable design performance, and therefore, in this example, it may be preferable for toric patients to wear a non-Gaussian apodized monofocal lens with a cylindrical error of up to 1.25D as the cylindrical error labeled power.However, it may still only be usable for patients with reduced cylindrical error (e.g., a maximum cylindrical error of only 0.75D), and may then be an improvement over an unapodized monofocal lens, which must be fitted with a toric lens.

[0041] This is also shown in Figure 7A, which illustrates an exemplary difference in VA (-10logMAR) for an astigmatic eye with a pupil size of 4mm and a prescribed refractive error correction and cylindrical error 702 when wearing (1) a monofocal lens with an apodization profile having a spherical power corresponding to the equivalent spherical power for the prescribed refractive error (e.g., a non-Gaussian apodized monofocal lens 400 in Figure 4), compared to when wearing a toric lens 704 without apodization having spherical and cylindrical powers corresponding to the prescribed refractive error and cylindrical error. As shown in Figure 7A, for a cylindrical error 702 of 0.75D, the VA is improved by 0.1 lines with the non-Gaussian apodized monofocal lens compared with the toric lens 704. For a cylindrical error of 1.0D in lens 702, the VA decreases by 0.1 rows in a non-Gaussian apodized monofocal lens compared to a toric lens 704. For a cylindrical error of 1.25D in lens 702, the VA decreases by -0.4 rows in a non-Gaussian apodized monofocal lens compared to a toric lens 704. For a cylindrical error of 1.5D in lens 702, the VA decreases by 0.6 rows in a non-Gaussian apodized monofocal lens compared to a toric lens 704. A VA decrease exceeding 0.5 rows may be unacceptable, and therefore, in this example, it may be desirable to use a non-Gaussian apodized monofocal lens with a cylindrical error of up to 1.25D as the specified cylindrical error label power limit for toric patients. However, this may only be usable for patients with reduced cylindrical error (e.g., a cylindrical error of only 0.75D at most), and is still better than an unapodized monofocal lens, which must then be fitted with a toric lens.

[0042] Therefore, if an astigmatic eye is determined to have a cylindrical error correction (e.g., ≤1.25D) smaller than a specified cylindrical error label power, then the astigmatic eye may be fitted with an apodized monofocal lens as an equivalent spherical power lens, as opposed to a toric lens, and still achieve an acceptable trade-off of improved VA or increased VA for the benefit of wearing comfort.

[0043] Alternatively, if an astigmatic eye is determined to have a cylindrical error correction smaller than a specified cylindrical error label power (e.g., ≤1.25D), then the astigmatic eye may be fitted with an apodized monofocal lens, as opposed to a toric lens, as an actual spherical lens (not an equivalent spherical power lens), and still achieve either an improved VA or an acceptable trade-off of VA for the benefit of increased wearing comfort.

[0044] In this regard, Figure 7B illustrates an exemplary difference in VA for astigmatic eyes with prescribed refractive error and cylindrical error 702 when wearing a monofocal lens (e.g., a non-Gaussian apodized monofocal lens 400 in Figure 4) (not an equivalent spherical power lens) with an apodization profile having a spherical power corresponding to the actual spherical power for the prescribed refractive error, and Table 706 compared with wearing a toric lens 704 without apodization, having spherical and cylindrical powers corresponding to the prescribed refractive error and cylindrical error. As shown in Figure 7B, for a cylindrical error 702 of 0.75D, the VA does not decrease with the non-Gaussian apodized monofocal lens compared to the toric lens 704. For a cylindrical error 702 of 1.0D, the VA decreases by only 0.2 rows with the non-Gaussian apodized monofocal lens compared to the toric lens 704. For a cylindrical error of 1.25D 702, the VA decreases by only 0.5 rows with a non-Gaussian apodized monofocal lens compared to a toric lens 704. For a cylindrical error of 1.5D 702, the VA decreases by 0.6 rows with a non-Gaussian apodized monofocal lens compared to a toric lens 704. A decrease of more than 0.5 rows in VA may be unacceptable, and therefore, in this example, it may be desirable to fit a non-Gaussian apodized monofocal lens with a cylindrical error of up to 1.25D as the specified cylindrical error label power limit to a toric patient. However, this may only be usable for patients with reduced cylindrical errors (e.g., a cylindrical error of only 0.75D at most), and is still better than an unapodized monofocal lens, which then must be fitted with a toric lens.

[0045] Apodized monofocal lenses are provided to be fitted to toric patients up to a specified cylindrical error label power (e.g., ≤1.25D) and are still determined to achieve either an improved VA or an acceptable trade-off of VA compared to toric lenses for the benefit of increased wearing comfort. Therefore, it may be desirable to provide contact lens sets that include such apodized monofocal lenses for different refractive error correction prescriptions across different cylindrical error correction prescriptions up to a specified cylindrical error label power. In this regard, Figure 8 is an exemplary contact lens set 800 used to correct the visual acuity of astigmatic patients. The contact lens set includes a first subset of non-Gaussian apodized monofocal lenses 802, such as the non-Gaussian apodized monofocal lens 400 of Figure 4, which has a spherical power and a non-Gaussian apodization transmission profile, selected for astigmatic eyes having a cylindrical power smaller than a specified cylindrical error label power (e.g., ≤1.25D). The first subset of non-Gaussian apodized monofocal lenses 802 may include one or more lenses having spherical power and a non-Gaussian apodization transmission profile, selected for astigmatic eyes having a cylindrical power smaller than a specified cylindrical error label power. The contact lens set 800 also includes a second subset of toric lenses 804, which are non-apodized toric lenses having spherical power and cylindrical power, selected for astigmatic eyes having a cylindrical error greater than a specified cylindrical error label power (e.g., >1.25D). The second subset of toric lenses 804 may include one or more lenses, which are non-apodized toric lenses having spherical power and cylindrical power, selected for astigmatic eyes having a cylindrical error greater than a specified cylindrical error label power. The second subset of toric lenses, 804, is provided when the VA trade-off when fitting apodized monofocal lenses for astigmatic eyes is greater than or unacceptable for the patient.

[0046] As shown in Figure 8, the first subset of non-Gaussian apodized monofocal lenses 802 includes non-Gaussian apodized monofocal lenses with stock-keeping units (SKUs) designed for use as either equivalent spherical power lenses or spherical lenses in toric patients with cylindrical errors up to a specified cylindrical error label power (e.g., ≤1.25D). The first subset of non-Gaussian apodized monofocal lenses 802 also includes non-Gaussian apodized monofocal lenses 802M for myopia correction for various myopic refractive powers from -12D to -1D, and non-Gaussian apodized monofocal lenses 802H for hyperopia correction for various hyperopic refractive powers from +1D to +9D. It should be noted that any desired number of SKUs of the non-Gaussian apodized monofocal lens 802M for myopia correction and the non-Gaussian apodized monofocal lens 802H for hyperopia correction for various respective myopic and hyperopic spherical powers can be provided for the first subset of the non-Gaussian apodized monofocal lens 802.

[0047] Furthermore, as shown in Figure 8, the second subset of toric lenses 804, which includes toric lenses, includes minimum stock management units (SKUs) for different cylindrical powers of 0.75D, 1.0D, and 1.25D (or up to a specified cylindrical error label power (e.g., >1.25D)). The toric lenses 804 in the second subset of toric lenses 804 have a stabilization mechanism to maintain the rotational stability of the toric lenses 804 on the eye. The second subset of toric lenses 804 also includes myopia-correcting toric lenses 804M for various myopia refractive powers starting from -12D, and hyperopia-correcting toric lenses 804H for various hyperopia refractive powers starting up to +9D. It should be noted that any desired number of SKUs of the toric lens 804M for myopia correction and the toric lens 804H for hyperopia correction for various myopic and hyperopic spherical powers can be provided for the second subset of the toric lens 804.

[0048] Figure 9 is a flowchart illustrating an exemplary fitting process 900 for fitting lenses to an astigmatic patient from a contact lens set, such as the contact lens set 800 in Figure 8, based on the required refractive error correction and cylindrical error correction. As will be discussed below, the fitting process 900 for fitting lenses to a patient's astigmatic eye from a contact lens set includes fitting lenses to the astigmatic eye from a first subset of lenses (e.g., apodized monofocal lens 802 in Figure 8, which has a non-Gaussian apodized monofocal lens, such as the non-Gaussian apodized monofocal lens 400 in Figure 4) which are apodized monofocal lenses having a spherical power and apodization profile related to the refractive error of the astigmatic eye, selected for fitting in an astigmatic eye having a cylindrical error smaller than a specified cylindrical error label power (e.g., ≤1.25D). The fitting process 900 for fitting a lens to an astigmatic eye from a contact lens set also includes fitting a lens to the patient from a second subset of lenses (e.g., toric lens 804 of the second subset in Figure 8), which are non-apodized toric lenses having spherical and cylindrical powers and a spherical power that substantially corrects the refractive error corresponding to the refractive error of the astigmatic eye, selected for astigmatic eyes having a cylindrical error correction greater than a specified cylindrical error label power (e.g., >1.25D). If the fitting process 900 in Figure 9 requires that an apodized monofocal lens from the first subset of lenses be fitted to an astigmatic eye when the cylindrical error of the astigmatic eye is less than a specified cylindrical error label power, the astigmatic eye may be fitted with an apodized monofocal lens as either an equivalent spherical power lens related to the refractive error of the astigmatic eye or an actual spherical lens corresponding to the refractive error of the astigmatic eye.

[0049] In this regard, the fitting process 900 in Figure 9 is considered with respect to the contact lens set 800 in Figure 8, but this is not limited to this. In this regard, as shown in Figure 9, the fitting process 900 includes determining the refractive error correction and cylindrical error correction of the contact lens wearer's astigmatic eye based on the refractive error and cylindrical error in the astigmatic eye (block 902 in Figure 9). In response to determining that the cylindrical error correction of the astigmatic eye is less than or equal to a specified cylindrical error label power (e.g., ≤1.25D) (block 904 in Figure 9), the fitting process 900 includes selecting a first apodized monofocal lens 802 from a first subset of apodized monofocal lenses 802 that is fitted to the astigmatic eye and has a refractive error label power associated with the determined refractive error correction (block 906 in Figure 9). The refractive error label power associated with the determined refractive error correction may be either the equivalent spherical power for the determined refractive error correction of the astigmatic eye, or the spherical power directly corresponding to the determined refractive error correction of the astigmatic eye.

[0050] However, in response to determining that the cylindrical error correction of the astigmatic eye is greater than a specified cylindrical error label power (e.g., >1.25D) (block 908 in Figure 9), the fitting process 900 includes selecting a second toric lens 804 from a second subset of toric lenses 804 that is fitted to the astigmatic eye and has a refractive error label power corresponding to the determined refractive error correction of the astigmatic eye, and also has a cylindrical error label power corresponding to the determined cylindrical error correction of the astigmatic eye (block 910 in Figure 9).

[0051] It should be noted that the fitting process 900 in Figure 9 can be performed on either or both of the right eye (ocular dexter, OD) and / or the left eye (ocular sinister, OS) astigmatism. In this regard, the fitting process 900 can determine the correction of OD and / or OS refractive error and OD and / or OS cylindrical error for the OD and / or OS astigmatism of a contact lens wearer based on the OD and / or OS refractive error and OD and / or OS cylindrical error in each OD and / or OS astigmatism. In response to determining that the OD and / or OS cylindrical error correction of each OD and / or OS astigmatism eye is less than or equal to a specified cylindrical error label power (e.g., ≤1.25D), the fitting process includes selecting a first apodized monofocal lens 802 from a first subset of apodized monofocal lenses 802 that is fitted to the OD and / or OS astigmatism eye and has a refractive error label power associated with each determined OD and / or OS refractive error correction (block 906 in Figure 9). The refractive error label power associated with each determined OD and / or OS refractive error correction may be either the equivalent spherical power for the determined refractive error correction of the OD and / or OS astigmatism eye, or the spherical power directly corresponding to each determined OD and / or OS refractive error correction of the OD and / or OS astigmatism eye.

[0052] However, in response to determining that the OD and / or OS cylindrical error correction of each OD and / or OS astigmatic eye is greater than a specified cylindrical error label power (e.g., >1.25D), the fitting process includes selecting a second toric lens 804 from a second subset of toric lenses 804 that is fitted to the astigmatic eye, having a refractive error label power corresponding to each determined OD and / or OS refractive error correction of each OD and / or OS astigmatic eye, and having a cylindrical error label power corresponding to each determined OD and / or OS cylindrical error correction of the astigmatic eye.

[0053] Furthermore, if a toric patient complains of a decrease in VA in an astigmatic eye fitted with an apodized monofocal lens, such as the apodized monofocal lens 802 from the first subset of Figure 8, and the cylindrical error is less than or equal to a specified cylindrical error label power (e.g., ≤1.25D), the astigmatic eye can be refitted with a toric lens having a cylindrical power corresponding to the cylindrical error of the astigmatic eye. In this regard, for example, the toric lens 804 from the second subset of Figure 8 can be extended with a separate third lens set, provided that the third lens set has refractive error correction SKUs with cylindrical powers less than or equal to a specified cylindrical error label power (e.g., ≤1.25D) that can also be fitted to an astigmatic eye. The patient can then determine whether the VA from the toric lens of the third lens set is acceptable.

[0054] Furthermore, if a toric patient complains of discomfort with a fitted toric lens, such as toric lens 804 from the second subset of Figure 8, in an astigmatic eye, and their cylindrical error is within a specified cylindrical error label power (e.g., >1.25D), the astigmatic eye may be refitted with an apodized monofocal lens, such as apodized monofocal lens 802 from the first subset of Figure 8. The patient can then determine whether the VA from apodized monofocal lens 802 is acceptable.

[0055] Figure 10 is a diagram of another exemplary monofocal lens 1000, including an exemplary apodization profile 1002 which has refractive error correction and is a Gaussian apodization transmission profile. The Gaussian apodized monofocal lens 1000 is an example of a Gaussian apodized monofocal lens that can be provided for use in the astigmatic eyes of patients with lower cylindrical error (e.g., ≤1.25 diopters (D)) which is smaller than the specified cylindrical error label power of the contact lens set. The Gaussian apodized monofocal lens 1000 can be used as a spherical lens or equivalent spherical power lens for astigmatic eyes to provide refractive error correction. Either the front surface 1004 or the rear surface 1006 of the optical zone 1008 of the Gaussian apodized monofocal lens 1000 may have a spherical power to provide refractive error correction according to a spherical power profile provided in the Gaussian apodized monofocal lens 1000.

[0056] As shown in Figure 10, the apodization profile 1002 in the Gaussian apodized single-focus lens 1000 filters the light transmission through the optical zone 1008 of the Gaussian apodized single-focus lens 1000 with respect to a radius r from the central axis C2 of the Gaussian apodized single-focus lens 1000. In this example, the Gaussian apodization transmission profile 1002 includes a first transmission zone 1010(1) in the optical zone 1008 between the central axis C2 and radius r5, which has a curved profile that progressively reduces the light transmission of the Gaussian apodized single-focus lens 1000 as a function of the radius increasing toward the edge 1012 of the optical zone 1008.

[0057] Figure 11A is a transmission graph 1100 of an exemplary Gaussian apodization transmission profile 1002 (with a central flat top / transmission) which can be provided as an apodization profile 1102 in the Gaussian apodized single-focus lens 1000 of Figure 10. As shown in Figure 11A, the transmission graph 1100 plots the percentage of light transmission as a function of radius r5 from the central axis C2. The Gaussian apodization transmission profile 1102 includes a first transmission region 1104(1) where light is transmitted 100% starting from the central axis C2 to a radius of approximately 0.8 mm, and then decreases to about 0.5% (e.g., 0.497%) of light transmission at a radius of approximately 2.8 mm from the central axis C2. Figure 11B is equation 1106 of light transmission (T) as a function of radius (r) (T / r) for the exemplary Gaussian apodization transmission profile 1102 of Figure 11A. Alternatively, it should be noted that a regular Gaussian apodization transmission profile can be provided in apodized monofocal lenses that do not have a centrally flat upper portion.

[0058] Figure 12 shows graph 1200 of the VA curves for a patient with a cylindrical error of 0.75D wearing a non-apodized monofocal lens (VA_Base) (VA_Base), for a patient wearing a Gaussian apodized monofocal lens (e.g., Gaussian apodized monofocal lens 1000 in Figure 10) (VA_Apod) (VA_Apod), and for a patient wearing a non-apodized toric lens (VA_Max) with a cylindrical power of 0.75D, all as functions of convergence motion (D). As shown in Figure 12, the non-apodized toric lens with a cylindrical power of 0.75D (VA_MaxA) shows a VA improvement of more than 0.6 lines compared to the non-apodized monofocal lens (VA_BaseA). Therefore, VA can be improved by fitting the patient with a non-apodized toric lens with a cylindrical power of 0.75D (VA_MaxA). However, as also shown in Figure 12, there is no VA improvement with a Gaussian apodized monofocal lens (e.g., Gaussian apodized monofocal lens 1000 in Figure 10) (VA_Apod) compared to a non-apodized toric lens with a cylindrical power of 0.75D (VA_Max), while the difference in VA between these lenses is less than 0.5 rows VA. Therefore, by fitting a Gaussian apodized monofocal lens (VA_Apod) (e.g., Gaussian apodized monofocal lens 1000 in Figure 10) to a patient with a cylindrical error of 0.75D, the patient can enjoy increased comfort compared to a non-apodized toric lens with a cylindrical power of 0.75D (VA_MaxB) with a stabilization mechanism, with very little or minimal trade-off in VA. For example, patients with a cylindrical error of 1.25D or less can enjoy increased comfort with very little or minimal trade-offs in visual acuity by using a Gaussian apodized monofocal lens (VA_Apod) (e.g., Gaussian apodized monofocal lens 1000 in Figure 10) instead of a non-apodized toric lens with a stabilization mechanism (VA_MaxB).Furthermore, implanting a non-Gaussian apodized monofocal lens (VA_ApodA) (e.g., Gaussian apodized monofocal lens 1000 in Figure 10) in patients with a 0.75D cylindrical error can result in at least a 0.5-row improvement in VA compared to a monofocal lens without apodization (VA_BaseA).

[0059] Gaussian apodized monofocal lenses are provided to be fitted to toric patients up to a specified cylindrical error label power (e.g., ≤1.25D) and are still determined to achieve either an improved VA or an acceptable trade-off of VA compared to toric lenses for the benefit of increased wearing comfort. Therefore, it may be desirable to provide contact lens sets that include such Gaussian apodized monofocal lenses for different refractive error correction prescriptions across different cylindrical error correction prescriptions up to a specified cylindrical error label power. In this regard, Figure 13 is an exemplary contact lens set 1300 used to correct the visual acuity of astigmatism patients. The contact lens set includes a first subset of Gaussian apodized monofocal lenses, such as the Gaussian apodized monofocal lens 1000 in Figure 10, which has a spherical power and Gaussian apodization transmission profile selected for astigmatic eyes having a cylindrical power smaller than a specified cylindrical error label power (e.g., ≤1.25D). The first subset of Gaussian apodized monofocal lenses 1302 may include one or more lenses having a selected spherical power and Gaussian apodization transmission profile for astigmatic eyes having a cylindrical power smaller than a specified cylindrical error label power. The fitting process 900 in Figure 9 can also be performed, as another example, using the contact lens set 1300 in Figure 13.

[0060] As shown in Figure 13, the first subset of Gaussian apodized monofocal lenses 1302 includes Gaussian apodized monofocal lenses with stock management units (SKUs) designed for use as either equivalent spherical power lenses or spherical lenses in toric patients with cylindrical errors up to a specified cylindrical error label power (e.g., ≤1.25D). The first subset of Gaussian apodized monofocal lenses 1302 also includes Gaussian apodized monofocal lenses 1302M for myopia correction for various myopic refractive powers from -12D to -1D, and Gaussian apodized monofocal lenses 1302H for hyperopia correction for various hyperopic refractive powers from +1D to +9D. It should be noted that any desired number of SKUs of the Gaussian apodized monofocal lens 1302M for myopia correction and the Gaussian apodized monofocal lens 1302H for hyperopia correction for various respective myopic and hyperopic spherical powers can be provided for the first subset of the Gaussian apodized monofocal lens 1302.

[0061] The contact lens set 1300 also includes, as part of the contact lens set 800, a second subset of toric lenses 804 previously discussed with respect to Figure 8, which are non-apodized toric lenses having spherical and cylindrical powers selected for astigmatic eyes with a cylindrical error greater than a specified cylindrical error label power (e.g., >1.25D). The second subset of toric lenses 804 may include one or more lenses having spherical and cylindrical powers selected for astigmatic eyes with a cylindrical error greater than a specified cylindrical error label power. The second subset of toric lenses 804 is provided when the VA trade-off when fitting an apodized monofocal lens to an astigmatic eye is greater than or acceptable for the patient.

[0062] The examples disclosed above include, but are not limited to, lens sets comprising: (1) an apodized monofocal lens from a first subset of lenses in a contact lens set provided for use in the astigmatic eyes of patients having a lower cylindrical error (e.g., ≤1.25 diopters(D)) which is less than the specified cylindrical error label power of the contact lens set; and (2) a non-apodized toric lens from a second subset of lenses in the contact lens set provided for use in the astigmatic eyes of patients having a higher cylindrical error (e.g., >1.25 diopters(D)) which is greater than the specified cylindrical error label power of the contact lens set. The specified cylindrical error label power is disclosed as an example of 1.25D, but the specified cylindrical error label power can also be adjusted from 1.25D. For example, the specified cylindrical error label power can be any desired cylindrical error label power, including 1.25D to 2.0D, such as 1.5D, 1.75D, and 2.0D, although this is not limited to such specified alternative cylindrical error label powers. Apodized monofocal lenses, including an apodization profile for use in the astigmatic eyes of patients with lower cylindrical errors than such alternative specified cylindrical error label powers, can still reduce or mask transmitted light through the peripheral region of the spherical lens, thereby still reducing the patient's effective pupil size, and thus reducing the overall wavefront aberration of the lens wearer, resulting in an effect of improving visual acuity in astigmatic patients with minimal or no trade-off in visual acuity (VA) of astigmatic patients.

[0063] Furthermore, in another exemplary embodiment, the lenses of a second subset of a contact lens set provided for use in the astigmatic eyes of patients with a higher cylindrical error greater than the specified cylindrical error label power of the contact lens set do not need to be unapodized toric lenses. Such lenses in the second subset may be apodized toric lenses that provide both toric correction and an apodized profile, in contrast to unapodized toric lenses. One advantage of such a contact lens set having a second subset of apodized toric lenses for use in the astigmatic eyes of patients with a higher cylindrical error greater than the specified cylindrical error label power of the contact lens is the cosmetic advantage of wear for bilateral patients with cylindrical errors above and below the specified cylindrical error label power, such that the patient wears lenses from each of the first subset and the second subset in each eye. By apodizing both the first and second subsets of lenses, the lens will appear similar in each eye, in contrast to bilateral wearers, where one eye would appear to have a clear lens and the other eye a darker apodized lens. Furthermore, the second subset of lenses, which are apodized toric lenses for use in the astigmatic eye of a patient with a higher cylindrical error greater than the specified cylindrical error label power, may also have the advantage of reducing higher-order spherical aberrations in the higher cylindrical-corrected eye compared to correcting cylindrical error in the larger pupil. The above embodiments relate to exemplary contact lens sets, contact lens pairs, and individual contact lenses, but it should be noted that such examples are not limited to contact lenses and can be applied to any type of lens and associated lens sets and pairs. It should also be noted that other apodization profiles can be provided for the apodized monofocal lenses considered herein, and the apodized monofocal lenses considered herein are not limited to the non-Gaussian and Gaussian apodization transmission profiles disclosed herein.

[0064] It is important to note that the lens designs of this disclosure may be incorporated into any number of different contact lenses formed from any number of materials. Specifically, the lens designs of this disclosure include, but are not limited to, daily disposable contact lenses, hard gas permeable contact lenses, multifocal contact lenses, toric contact lenses, and hybrid contact lenses, and any of the contact lenses described herein may be used. In addition, although this disclosure describes contact lenses, it is important to note that the concepts of this disclosure may be applied to spectacle lenses, intraocular lenses, corneal inlays, and onlays.

[0065] This disclosure is not limited to the specific embodiments disclosed, and modifications and other embodiments are intended to be included within the scope of the appended claims and their equivalents. Certain terms are used herein, but they are used in a general and descriptive sense, not for restrictive purposes. A person skilled in the art will understand the concepts of this disclosure and recognize applications of those concepts not specifically addressed herein by reading the following description in reference to the accompanying drawings. The embodiments described below represent the information necessary to enable a person skilled in the art to implement this disclosure and represent the best form of implementation. These concepts and uses are intended to be included within the scope of this disclosure and the appended claims. Many modifications and other embodiments of this disclosure described herein will be conceivable to a person skilled in the art to which this disclosure relates, who has an interest in the teachings presented in the foregoing description and the associated drawings. Modifications and other embodiments are shown and described in what is considered the most practical and specific embodiment disclosed, but are intended to be included within the scope of the appended claims. It will be apparent to those skilled in the art that deviations from the specific designs and methods described and illustrated may be presented to them and used without departing from the spirit and scope of this disclosure.

[0066] Implementation examples are described in the following numbered sections. 1. A method for fitting contact lenses in a contact lens set for astigmatism patients, comprising multiple lenses, wherein each of the multiple lenses has a spherical power to substantially correct the refractive error corresponding to an inherent refractive error label power, The refractive error correction and cylindrical error correction for astigmatic eyes of contact lens wearers are determined based on the refractive error and cylindrical error in the astigmatic eye. In response to determining the cylindrical error correction for astigmatic eyes to be ≤1.25D, Selecting a first lens from a first subset of lenses that is suitable for an astigmatic eye and has a refractive error label power associated with the determined refractive error correction, In response to determining the cylindrical error correction for astigmatic eyes as >1.25D, This includes selecting a second lens from a second subset of lenses that is suitable for an astigmatic eye, having a refractive error label power corresponding to the determined refractive error correction and a cylindrical error label power corresponding to the determined cylindrical error correction, Here, The first subset of lenses among multiple lenses each includes a prime lens that further has an apodization profile, A method comprising a second subset of lenses, each of which is an unapodized toric lens having a further cylindrical power that substantially corrects a cylindrical error corresponding to an intrinsic cylindrical error label power of >1.25 diopters (D). 2. Selecting the first lens from the first subset of lenses, The method according to Clause 1, comprising selecting a first lens from a first subset of lenses that is suitable for an astigmatic eye, having a refractive error label power of equivalent spherical power for the determined refractive error correction and the determined cylindrical error correction. 3. Selecting the first lens from the first subset of lenses, The method according to Clause 1, comprising selecting a first lens from a first subset of lenses that is suitable for an astigmatic eye and has a refractive error label power corresponding to the determined refractive error correction. 4. In response to determining the cylindrical error correction for astigmatic eyes to be ≤1.25D, When wearing the first lens selected for astigmatism, feedback is received from the contact lens wearer based on perceived visual acuity, In response to feedback indicating that perceived visual acuity is unacceptable to contact lens wearers, The method further includes selecting a third lens suitable for an astigmatic eye from a third subset of lenses, which has a second refractive error label power corresponding to the determined refractive error correction and a cylindrical error label power corresponding to the determined cylindrical error correction, The method according to any one of claims 1 to 3, wherein each lens in the third subset of lenses includes an unapodized toric lens having a further cylindrical power that substantially corrects a cylindrical error corresponding to an intrinsic cylindrical error label power of ≤1.25D. 5. In response to determining the cylindrical error correction for astigmatic eyes to be >1.25D, Based on the perceived comfort when wearing the second lens selected for astigmatism, feedback will be received from contact lens wearers, In response to feedback indicating that what is perceived is acceptable to the contact lens wearer, The method according to any one of clauses 1 to 4, further comprising selecting a first lens, which is suitable for an astigmatic eye and has a refractive error label power associated with the determined refractive error correction, from a first subset of lenses among a plurality of lenses. 6. Determining the refractive error correction for astigmatism in contact lens wearers is To determine the correction of OD refractive error in the right eye (OD) of a contact lens wearer with astigmatism, This includes determining the correction of the refractive error in the left eye (OS) of a contact lens wearer with OS astigmatism, Determining cylindrical error correction for contact lens wearers is To determine the correction of OD cylindrical error for OD astigmatism, To determine the correction of OS cylindrical error in OS astigmatism, and In response to determining the cylindrical error correction for OD astigmatism as ≤1.25D, Selecting a first lens for OD astigmatism, which is suitable for an OD astigmatism eye having a refractive error label power associated with the determined OD refractive error correction, from a first subset of lenses, In response to determining the cylindrical error correction for OD astigmatism as >1.25D, A second lens suitable for OD astigmatism is selected from a second subset of lenses, having a refractive error label power corresponding to the determined OD refractive error correction and a cylindrical error label power corresponding to the determined OD cylindrical error correction. In response to determining the cylindrical error correction for OS astigmatism as ≤1.25D, Select a third lens for OS astigmatism, from the first subset of lenses, that is suitable for OS astigmatism and has a refractive error label power associated with the determined OS refractive error correction. In response to determining the cylindrical error correction for OS astigmatism as >1.25D, The method according to any one of clauses 1 to 5, comprising selecting a fourth lens from a second subset of lenses that is suitable for an OS astigmatism eye, having a refractive error label power corresponding to the determined OS refractive error correction and a cylindrical error label power corresponding to the determined OS cylindrical error correction. 7. The method according to any one of the claims 1 to 6, wherein each lens of the first subset of lenses has a non-Gaussian apodization transmission profile. 8. The method according to any one of clauses 1 to 8, wherein the apodization profile in each lens of the first subset of lenses is configured to allow 100% transmission up to a radius of approximately 0.7897 millimeters (mm) from the central axis and a second transmission zone having less than 100% transmission, wherein such transmission decreases as a function of increasing radius. 9. Each lens of the first subset of lenses has a central axis and has a non-Gaussian apodization transmission profile including the following:

[0067]

number

[0068]

number

[0069]

number

[0070] [Implementation Method] (1) A method for fitting contact lenses in a set of contact lenses for a patient with astigmatism, wherein each of the lenses has a spherical power to substantially correct a refractive error corresponding to a specific refractive error label power, and the method is The refractive error correction and cylindrical error correction for astigmatic eyes of contact lens wearers are determined based on the refractive error and cylindrical error in the astigmatic eye. In response to determining that the cylindrical error correction for the astigmatic eye is ≤1.25D, Selecting a first lens from a first subset of lenses that is suitable for the astigmatic eye and has a refractive error label power related to the refractive error correction determined above, In response to determining that the cylindrical error correction for the astigmatic eye is >1.25D, The method includes selecting a second lens from a second subset of lenses that is suitable for the astigmatic eye, having a refractive error label power corresponding to the determined refractive error correction and a cylindrical error label power corresponding to the determined cylindrical error correction, Each of the lenses in the first subset of the plurality of lenses further includes a prime lens having an apodization profile, A method comprising the second subset of lenses among the plurality of lenses, each of which includes an unapodized toric lens having a further cylindrical power that substantially corrects a cylindrical error corresponding to an intrinsic cylindrical error label power of >1.25 diopters (D). (2) Selecting the first lens from the first subset of lenses, The method according to Embodiment 1, comprising selecting the first lens, which is suitable for the astigmatic eye, from the first subset of lenses, having a refractive error label power of the equivalent spherical power of the determined refractive error correction and the determined cylindrical error correction. (3) Selecting the first lens from the first subset of lenses, The method according to Embodiment 1, comprising selecting the first lens, which is suitable for the astigmatic eye and has a refractive error label power corresponding to the determined refractive error correction, from the first subset of lenses. (4) In response to determining that the cylindrical error correction of the astigmatic eye is ≤1.25D, When the selected first lens is worn in the astigmatic eye, feedback is received from the contact lens wearer based on perceived visual acuity. In response to the feedback indicating that the perceived visual acuity is unacceptable to the contact lens wearer, The present invention further includes selecting a third lens from a third subset of the plurality of lenses that is suitable for the astigmatic eye, having a second refractive error label power corresponding to the determined refractive error correction and a cylindrical error label power corresponding to the determined cylindrical error correction, The method according to Embodiment 1, wherein each lens in the third subset of lenses includes an unapodized toric lens having a further cylindrical power that substantially corrects a cylindrical error corresponding to an intrinsic cylindrical error label power of ≤1.25D. (5) In response to determining that the cylindrical error correction of the astigmatic eye is >1.25D, Based on the perceived comfort when the selected second lens is worn in the astigmatic eye, feedback is received from the contact lens wearer. In response to the feedback indicating that the perceived sensation is acceptable to the contact lens wearer, The method according to Embodiment 1, further comprising selecting a first lens, which is suitable for the astigmatic eye and has a refractive error label power associated with the determined refractive error correction, from a first subset of the plurality of lenses.

[0071] (6) Determining the refractive error correction for the astigmatic eye of the contact lens wearer, To determine the correction of the OD refractive error in the right eye (OD) of the contact lens wearer with astigmatism, This includes determining the correction of the refractive error of the left eye (OS) of the contact lens wearer with astigmatism, Determining the correction of the cylindrical error for the contact lens wearer is To determine the correction of the OD cylindrical error for the aforementioned OD astigmatic eye, and To determine the correction of the OS cylindrical error for the aforementioned OS astigmatic eye, and In response to determining that the cylindrical error correction for the aforementioned OD astigmatic eye is ≤1.25D, Selecting a first lens for the OD astigmatism eye that is suitable for the OD astigmatism eye and has a refractive error label power associated with the determined OD refractive error correction, from the first subset of lenses, In response to determining the cylindrical error correction of the aforementioned OD astigmatic eye to be >1.25D, A second lens suitable for the OD astigmatic eye is selected from the second subset of lenses, having a refractive error label power corresponding to the determined OD refractive error correction and a cylindrical error label power corresponding to the determined OD cylindrical error correction. In response to determining that the cylindrical error correction for the aforementioned OS astigmatic eye is ≤1.25D, Selecting a third lens for the OS astigmatism eye from the first subset of lenses, which is suitable for the OS astigmatism eye and has a refractive error label power associated with the determined OS refractive error correction, In response to determining that the cylindrical error correction for the aforementioned OS astigmatic eye is >1.25D, The method according to Embodiment 1, comprising selecting a fourth lens from the second subset of lenses that is suitable for the OS astigmatic eye, having a refractive error label power corresponding to the determined OS refractive error correction and a cylindrical error label power corresponding to the determined OS cylindrical error correction. (7) The method according to Embodiment 1, wherein each lens among the first subset of lenses has a non-Gaussian apodization transmission profile. (8) The method according to Embodiment 1, wherein the apodization profile in each lens of the first subset of lenses is configured to allow 100% transmission up to a radius of about 0.7897 millimeters (mm) from the central axis and a second transmission zone having less than 100% transmission, wherein such transmission decreases as a function of increasing radius. (9) Each lens of the first subset of lenses has a central axis and has a non-Gaussian apodization transmission profile including the following:

number

[0072] (11) Each lens of the first subset of lenses has a central axis and has a Gaussian apodization transmission profile including the following:

number

number

[0073] (16) The contact lens set according to Embodiment 13, wherein the front surface of each of the lenses of the first subset has the spherical power. (17) The contact lens set according to Embodiment 13, wherein the posterior surface of each of the lenses of the first subset has the spherical power. (18) Each of the front or rear surfaces of the lenses of the second subset has the spherical power, The contact lens set according to Embodiment 13, wherein the other of the front or rear surface of each of the lenses of the second subset has the cylindrical power. (19) The contact lens set according to Embodiment 13, wherein the unapodized toric lens in each of the lenses of the second subset further comprises a stabilization mechanism for maintaining rotational stability of the unapodized toric lens on the eye. (20) The contact lens set according to Embodiment 13, wherein the front surface of each of the lenses of the second subset has the cylindrical power.

[0074] (21) The contact lens set according to Embodiment 13, wherein the rear surface of each of the lenses of the second subset has the cylindrical power. (22) The contact lens set according to Embodiment 13, further comprising a third subset of lenses from the plurality of lenses, each including an unapodized toric lens, each having a second cylindrical power that substantially corrects a cylindrical error corresponding to a second cylindrical error label power of ≤1.25D.

Claims

1. A contact lens set for correcting the vision of a contact lens wearer with astigmatism, The present invention comprises multiple lenses, each having a spherical power that substantially corrects the refractive error corresponding to a specific refractive error label power, The lenses of the first subset of the plurality of lenses each include a single focal length lens having a first optical zone having a first central axis and a first radius extending from the first central axis to the first lens edge, and each further having an apodization profile. The lenses of the second subset of the aforementioned lenses each further include an unapodized toric lens having a cylindrical power that substantially corrects a cylindrical error corresponding to an intrinsic cylindrical error label power of >1.25 diopters (D), A contact lens set wherein the apodization profile in each lens of the first subset of lenses includes a first transmission zone that allows 100% transmission up to a first radius of about 0.7897 millimeters (mm) from the first central axis, and a second transmission zone having less than 100% transmission, wherein such transmission decreases as a function of increasing first radius.

2. The contact lens set according to claim 1, wherein the apodization profile of each first lens among the lenses of the first subset includes a non-Gaussian apodization transmission profile.

3. The non-Gaussian apodization transmission profile includes the following: [Math 1] During the ceremony, The contact lens set according to claim 2, wherein r = radius from the first central axis.

4. The contact lens set according to claim 1, wherein each front surface of the lenses of the first subset has the spherical power.

5. The contact lens set according to claim 1, wherein the posterior surface of each of the lenses of the first subset has the spherical power.

6. Each of the front or rear surfaces of the lenses in the second subset has the spherical power, The contact lens set according to claim 1, wherein the other of the front or rear surface of each of the lenses of the second subset has the cylindrical power.

7. The contact lens set according to claim 1, wherein the unapodized toric lens in each of the lenses of the second subset further comprises a stabilization mechanism for maintaining rotational stability of the unapodized toric lens on the eye.

8. The contact lens set according to claim 1, wherein each front surface of the lenses of the second subset has the cylindrical power.

9. The contact lens set according to claim 1, wherein the rear surface of each of the lenses of the second subset has the cylindrical power.

10. The contact lens set according to claim 1, further comprising a third subset of lenses from the plurality of lenses, each including an unapodized toric lens, each having a second cylindrical power that substantially corrects a cylindrical error corresponding to a second cylindrical error label power of ≤1.25D.

11. A method for fitting contact lenses in a contact lens set for a patient with astigmatism, wherein each of the lenses has a spherical power to substantially correct a refractive error corresponding to a specific refractive error label power, and the method is The refractive error correction and cylindrical error correction for astigmatic eyes of contact lens wearers are determined based on the refractive error and cylindrical error in the astigmatic eye. In response to determining that the cylindrical error correction for the astigmatic eye is ≤1.25D, Selecting a first lens from a first subset of lenses that is suitable for the astigmatic eye and has a refractive error label power related to the refractive error correction determined above, In response to determining that the cylindrical error correction for the astigmatic eye is >1.25D, The process includes selecting a second lens from a second subset of lenses that is suitable for the astigmatic eye, having a refractive error label power corresponding to the determined refractive error correction and a cylindrical error label power corresponding to the determined cylindrical error correction, Each of the lenses in the first subset of the plurality of lenses further includes a prime lens having an apodization profile, A method comprising the second subset of lenses among the plurality of lenses, each of which includes an unapodized toric lens having a cylindrical power that substantially corrects a cylindrical error corresponding to an intrinsic cylindrical error label power of >1.25 diopters (D).

12. Selecting the first lens from the first subset of lenses is The method according to claim 11, comprising selecting the first lens, which is suitable for the astigmatic eye, from the first subset of lenses, having a refractive error label power of the equivalent spherical power of the determined refractive error correction and the determined cylindrical error correction.

13. Selecting the first lens from the first subset of lenses is The method according to claim 11, comprising selecting the first lens, which is suitable for the astigmatic eye and has a refractive error label power corresponding to the determined refractive error correction, from the first subset of lenses.

14. In response to determining that the cylindrical error correction for the astigmatic eye is ≤1.25D, When the selected first lens is worn in the astigmatic eye, feedback is received from the contact lens wearer based on perceived visual acuity. In response to the feedback indicating that the perceived visual acuity is unacceptable to the contact lens wearer, The present invention further includes selecting a third lens from a third subset of the plurality of lenses that is suitable for the astigmatic eye, having a second refractive error label power corresponding to the determined refractive error correction and a cylindrical error label power corresponding to the determined cylindrical error correction, The method according to claim 11, wherein each lens in the third subset of lenses further includes an unapodized toric lens having a cylindrical power that substantially corrects a cylindrical error corresponding to an intrinsic cylindrical error label power of ≤1.25D.

15. In response to determining that the cylindrical error correction for the astigmatic eye is >1.25D, Based on the perceived comfort when the selected second lens is worn in the astigmatic eye, feedback is received from the contact lens wearer. In response to the feedback indicating that the perceived sensation is acceptable to the contact lens wearer, The method according to claim 11, further comprising selecting a first lens, which is suitable for the astigmatic eye and has a refractive error label power associated with the determined refractive error correction, from a first subset of the plurality of lenses.

16. To determine the refractive error correction for the astigmatic eye of the contact lens wearer, To determine the correction of the OD refractive error for the right eye (OD) of the contact lens wearer, This includes determining the correction of the OS refractive error for the left eye (OS) of the contact lens wearer with astigmatism, Determining the correction of the cylindrical error for the contact lens wearer is To determine the correction of the OD cylindrical error for the aforementioned OD astigmatism eye, To determine the correction of the OS cylindrical error for the OS astigmatism eye, In response to determining that the cylindrical error correction for the aforementioned OD astigmatic eye is ≤1.25D, Selecting a first lens for the OD astigmatism eye from the first subset of lenses, which is suitable for the OD astigmatism eye and has a refractive error label power associated with the determined OD refractive error correction, In response to determining that the cylindrical error correction for the aforementioned OD astigmatic eye is >1.25D, A second lens suitable for the OD astigmatic eye is selected from the second subset of lenses, having a refractive error label power corresponding to the determined OD refractive error correction and a cylindrical error label power corresponding to the determined OD cylindrical error correction. In response to determining that the cylindrical error correction of the OS astigmatic eye is ≤1.25D, A third lens for the OS astigmatism eye, which is suitable for the OS astigmatism eye and has a refractive error label power associated with the determined OS refractive error correction, is selected from the first subset of lenses. In response to determining that the cylindrical error correction for the aforementioned OS astigmatic eye is >1.25D, The method according to claim 11, comprising selecting a fourth lens from the second subset of lenses that is suitable for the OS astigmatism eye, having a refractive error label power corresponding to the determined OS refractive error correction and a cylindrical error label power corresponding to the determined OS cylindrical error correction.

17. The method according to claim 11, wherein each lens among the first subset of lenses has a non-Gaussian apodization transmission profile.

18. The method according to claim 11, wherein the apodization profile in each lens of the first subset of lenses is configured to allow 100% transmission up to a radius of about 0.7897 millimeters (mm) from the central axis and a second transmission zone having less than 100% transmission, wherein such transmission decreases as a function of increasing radius.

19. Each lens in the first subset of lenses has a central axis and a non-Gaussian apodization transmission profile including the following: [Math 2] During the ceremony, The method according to claim 11, wherein r = radius from the central axis.

20. The method according to claim 11, wherein each lens among the first subset of lenses has a central axis and a Gaussian apodization transmission profile.

21. Each lens in the first subset of lenses has a central axis and a Gaussian apodization transmission profile including the following: [Math 3] During the ceremony, The method according to claim 11, wherein r = radius from the central axis.

22. The method according to claim 11, wherein the unapodized toric lens in each of the second subset of lenses further comprises a stabilization mechanism for maintaining rotational stability of the unapodized toric lens on the eye.

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