Method of fitting astigmatic contact lens sets including apodized monooptic lenses for lower lenticular error correction and toric lenses for higher lenticular error, and associated astigmatic lens sets

Abstract

A fitting method for an astigmatic contact lens set and an associated astigmatic contact lens set. The astigmatic contact lens set includes an apodization monooptic lens for lower lenticular error correction and a toric lens for higher lenticular error correction. An astigmatic eye having a lenticular error greater than a higher specified lenticular error label focal power (e.g., gt; 1.25 diopter (D)) may be equipped with a non-apodized toric lens with a stabilization mechanism. However, astigmatic eyes having lenticular errors up to higher specified lenticular error label powers (e.g., < = 1.25 diopters (D)) may be equipped with apodized monocular lenses. The apodized monocular lens has an apodized distribution that reduces aberration to provide improved vision, so that a larger number of astigmatic patients up to higher lenticular error can achieve acceptable vision with the apodized monocular lens and improve comfort due to the absence of a stabilizing mechanism.

Description

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

[0002] This disclosure relates to the field of ophthalmic lenses for patients with astigmatism. More specifically, this disclosure relates to a lens system including an apoplexy lens, and a method of prescribing a lens system for a patient with astigmatism. Background Technology

[0003] Common conditions that cause decreased visual acuity include myopia (nearsightedness) and hyperopia (farsightedness), which require corrective lenses in the form of glasses or rigid or soft contact lenses. These conditions are often described as an imbalance between the length of the eye and the focusing power of the eye's optics. Myopic eyes focus light in front of the plane of the retina, while hyperopic eyes focus light behind the plane of the retina. Myopia usually develops because the axial length of the eye grows longer than the focal length of the eye's optics; that is, the eye becomes too long. Hyperopia usually develops because the axial length of the eye is too short compared to the focal length of the eye's optics. Patients with these conditions can correct their vision with spherical contact lenses with the appropriate spherical power.

[0004] Astigmatism is an optical or refractive defect in which an individual's vision is blurred because the eye cannot focus point objects onto the retina to form a focused image. Astigmatism is caused by the non-rotationally symmetric curvature of the eye's refractive surfaces, including the cornea and lens. For example, Figure 1A An astigmatic eye 100 is shown, comprising a cornea 102 that is more steeply curved in one direction than in another, such that the refractive surfaces of the cornea 102 are not rotationally symmetric. In other words, one or more refractive surfaces of the cornea 102 are more curved or steeper along one principal meridian relative to another orthogonal principal meridian, resulting in different amounts of optical power and wavefront aberration along different meridians. This causes the image 104 to be stretched into a bilinear focal point 106 rather than focused on a single point. Figure 1B The non-astigmatic eye 108 shown has a cornea 110 with a rotationally symmetric refractive surface, which allows the image 112 to be focused onto a single point 114.

[0005] Rigid or rigid gas-permeable contact lenses can be used to correct corneal astigmatism. In this case, a fluid or tear film lens can be present between the posterior surface of the rigid contact lens and the cornea. This fluid or tear film lens conforms to or shapes the posterior surface of the contact lens. Because the refractive index of the fluid or tear film lens almost matches that of the cornea, it can optically cancel or reduce corneal scattering. In these cases, toric lenses are usually not needed. However, rigid gas-permeable and rigid contact lenses are generally less comfortable than soft or hydrogel contact lenses. Because soft or hydrogel contact lenses wrap around the cornea, there is generally no fluid lens and the tear film is more like a thin film. In this case, a toric lens design is required.

[0006] Toric lenses are optical elements that have two different optical powers in two orientations perpendicular to each other. Essentially, a toric lens has two spherical powers along orthogonal meridians for correcting myopia or hyperopia. These powers are generated by utilizing curvatures preferably held relative to the eye at different angular orientations. Toric lenses can be used in eyeglasses, intraocular lenses, and contact lenses. Toric lenses used in eyeglasses or intraocular lenses are held fixed relative to the eye by the frame or haptics, thus always providing optimal visual correction. However, toric contact lenses tend to rotate on the eye, thus temporarily providing suboptimal visual correction. Therefore, toric contact lenses also include mechanisms for holding the contact lens relatively stably on the eye when the wearer blinks or looks around.

[0007] Maintaining the orientation of toric contact lenses on the eye is usually achieved through mechanical means. For example, "prism stabilization," which includes eccentricity or tilting of the anterior surface of the contact lens relative to the posterior surface, thickening of the periphery of the lower contact lens, forming depressions or protrusions on the surface of the contact lens, and truncating the edge of the contact lens, are all methods that have been used.

[0008] Additionally, "static stabilization" has been used, where a contact lens is stabilized by using thick and thin zones, or, depending on the specific circumstances, by using areas that increase or decrease the thickness of the contact lens periphery. Typically, the thick or thin zones are located around the periphery of the contact lens and are symmetrical about the vertical and / or horizontal axes. For example, each of two thick or thin zones can be positioned on either side of the optical zone and centered along the 0-180 degree axis of the contact lens, as illustrated, for example, in U.S. Patent No. 11,281,024. In another example, a single thick zone positioned at the bottom of the contact lens can be designed to provide a weight effect similar to prism stabilization, but also combined with a zone that increases in thickness from top to bottom to utilize upper eyelid forces to stabilize the contact lens. It is important to note that earlier technical literature used the term "dynamic stabilization" to refer to the static stabilization described herein. The terms static stabilization and dynamic stabilization can be used interchangeably.

[0009] The challenge with current designs or utilization of the stabilization zone is the trade-off between contact lens stability and comfort, as well as the physical limitations associated with increased thickness. The slope of the stabilization zone is fixed within the contact lens. Design changes to improve the rotational speed of deposition (such as increasing the surface slope of the stabilization zone) also increase thickness and can adversely affect comfort. Furthermore, the contact lens needs to accomplish two things: rotate to the proper orientation upon insertion and maintain that orientation during wear. Conventional designs require performance trade-offs between these aspects.

[0010] In patients with astigmatism, the higher the known required cylindrical lens error correction, the more sensitive the patient is to axial misalignment and rotational stability of the eye in terms of adverse effects on the wearer's visual acuity. See, for example, U.S. Patent No. 11,281,024. Therefore, to achieve higher cylindrical lens error correction, a more robust stabilization mechanism is required in the lens design, which typically necessitates a more pronounced (thicker) stabilization zone. However, such stabilization mechanisms can increase patient awareness due to the interaction between the eyelid and the mechanical stability characteristics of the lens. For lower cylindrical lens error correction, the lens stabilization design can be less pronounced because the patient is less sensitive to axial rotational misalignment, thus allowing the patient to tolerate a higher level of misalignment before adverse effects on vision occur.

[0011] Currently, some eye care practitioners are attempting to prescribe spherical lenses instead of toroidal lenses for patients with low cylinder power (typically ≤0.75 diopters (D)) by placing them in “spherical equivalent” lenses. Spherical equivalent lenses are designed to provide the closest estimate of a prescription, excluding the cylinder power used for cylinder error correction. These patients are prescribed spherical lenses where the spherical power value is derived by taking their actual spherical power correction requirement and adding a number equal to half their actual cylinder power requirement. Because these patients are not properly correcting their actual spherical or cylinder power requirements, their visual acuity using spherical equivalent lenses is clinically significant compared to their visual acuity using optimal toroidal lenses (e.g., a decrease of more than 0.5 lines -10 log minimum resolving angle (MAR)). However, compared to toric lenses, the advantage of spherical equivalent lenses for the wearer is that spherical lenses are generally cheaper and more comfortable than toric lenses.

[0012] In addition to the myopia or hyperopia described above, the human visual system typically also possesses higher-order aberrations that prevent precise focusing on image points, resulting in blurred images and reduced retinal image quality. These higher-order aberrations can include spherical aberration, coma, trilobal aberration, etc. Spherical aberration (SPHA) occurs when the focal position changes with increasing radius from the center of the lens, leading to reduced image contrast and decreased visual acuity. For example, Figure 2 Figure 200 shows the mean spherical aberration (SPHA) (D / mm²) of the patient's eye as a function of refractive power (SKU (D)) compared to the typical spherical lens SPHA in curve 204. 2 Examples. Figure 2 As shown in curve 200, at -3D, the average ocular SPHA of the patient's eye in curve 202 cancels out the lens SPHA in curve 204. However, due to significant ocular SPHA bias, most patients have residual SPHA in the eyepiece system. Besides SPHA and astigmatism, other aberrations (including HOA and slight defocus aberrations (e.g., less than 0.25D)) can also contribute to decreased retinal image quality in patients. For all these residual aberrations (including astigmatism, SPHA, slight defocus, HOA, etc.), they have a lower root mean square (RMS) in their central region than in their peripheral region. Therefore, masking the peripheral region will reduce the total wavefront RMS.

[0013] For patients with uncorrected astigmatism (e.g., when wearing spherically equivalent lenses), spherical aberrations along the toric meridian may be more pronounced than in myopic or hyperopic patients due to the difference in curvature between the two different meridians. Residual aberrations (including astigmatism, spherical aberrations, defocus, etc.) have a lower wavefront RMS in the central area than in the periphery.

[0014] In general, for contact lens wearers with these aberrations, the wavefront RMS can be reduced by "masking" the peripheral area of ​​the lens, a technique also known as "apodization." "Masking" or "apodization" refers to adjusting the percentage of light transmittance through the lens based on the radial position of the light rays relative to the central axis. The apodization distribution of a lens can take different forms depending on the design intent, such as Gaussian or non-Gaussian distributions (with or without a central area of ​​100% transmittance), and distributions extending to the edges of the optical zone or the lens edge.

[0015] The benefits of apodization can include improving the modular transfer function (MTF) for lower spatial frequencies of interest. The gradual change in apodization transmission distribution can reduce the effects of diffraction at the pupil margin and / or reduce the effects of higher-order aberrations, thereby improving overall visual performance. Summary of the Invention

[0016] The aspects disclosed herein include methods for fitting astigmatic contact lens sets, which include apodized single-vision lenses for lower cylinder error correction and toric lenses for higher cylinder error correction. Related astigmatic contact lens sets are disclosed. In an exemplary aspect, an astigmatic contact lens set is provided, comprising a first subgroup (i.e., one or more) of lenses that are apodized single-vision lenses available in various prescriptions, having spherical power and apodization distribution for refractive error correction. The contact lens set also includes a second subgroup (i.e., one or more) of lenses that are non-apodized toric lenses available in various prescriptions, having spherical power for refractive error correction and cylindrical power for cylinder error correction. Astigmatic patients can be fitted with lenses from the corresponding first and second subgroups of lenses in the contact lens set, including single-vision and toric lenses, according to their refractive error correction and cylinder error correction prescriptions.

[0017] In an exemplary aspect, an apodized single-vision lens from a first subgroup of lenses in the contact lens set is provided for a patient with astigmatism having a lower cylinder error (e.g., ≤1.25 diopters (D)) than the specified cylinder error label power of the contact lens set. A non-apodized toric lens from a second subgroup of lenses in the contact lens set is provided for a patient with a higher cylinder error (e.g., >1.25 diopters (D)) than the specified cylinder error label power of the contact lens set. The apodized single-vision lens in the contact lens set is an apodized lens that includes an apodization distribution that reduces or masks transmitted light through the peripheral area of ​​the spherical lens to reduce the patient's effective pupil size. This reduces the overall wavefront aberration of lens wearers fitted with such apodized single-vision lens and has the effect of improving visual acuity in astigmatic patients with a cylinder error equal to or lower than the specified cylinder error label power, with minimal or no trade-off in visual acuity (VA). For example, as disclosed herein, contact lens families have been developed that include apodized single-vision lenses to correct visual acuity in astigmatic eyes with a cylinder error correction of up to 1.25 diopters (D) as a specified cylinder error label power, where the VA (visual acuity) trade-off is minimal or nonexistent. Therefore, a large number of patients with astigmatic eyes may be able to be fitted with apodized single-vision lenses from contact lens families that provide an acceptable VA and enhanced comfort for the astigmatic patient with a cylinder error higher than the specified cylinder error label power. This could avoid or reduce the need for toric lenses to be fitted to astigmatic patients with cylinder errors up to the specified cylinder error label power, which may be less desirable due to lower comfort (e.g., due to their stabilization mechanism) and / or higher cost.

[0018] Therefore, in the disclosed contact lens group, if a patient with astigmatism has a cylinder error correction of less than a specified cylinder error (e.g., ≤1.25D), the astigmatic eye can be fitted with an apodized single-vision lens from the first subgroup of lenses. This apodized single-vision lens is more comfortable to wear and provides visual acuity with minimal or no compromise in VA. This allows a larger number of patients with astigmatism to be fitted with apodized single-vision lenses from the contact lens group that provide acceptable VA and enhanced comfort, and whose astigmatic eye has a cylinder error greater than the specified cylinder error label power. However, if a patient with astigmatism prefers torsional lenses and / or has a cylinder error correction greater than the specified cylinder error label power of the contact lens group (e.g., >1.25D), the astigmatic eye can be fitted with a torsional lens from the second subgroup of lenses. This torsional lens has a refractive error correction label power and a cylinder error label power corresponding to the correction requirements of the astigmatic eye.

[0019] In one exemplary aspect, if it is determined that the astigmatic eye has a cylinder error correction of less than a specified cylinder error label power, such that the astigmatic eye is fitted with an apodized single-vision lens, then the astigmatic eye may be fitted with an apodized single-vision lens as a spherical equivalent lens. The spherical equivalent lens is a single-vision lens having a spherical power based on the refractive error correction and the astigmatic correction of the astigmatic eye. For example, the spherical equivalent lens may have a spherical power based on the sum of the refractive error correction and the cylinder error correction. The spherical equivalent lens is intended to provide the closest estimate of the prescription for the astigmatic eye, excluding the cylinder power used for cylinder error correction.

[0020] In another exemplary aspect, if it is determined that the astigmatic eye has a cylinder error correction of less than a specified cylinder error label power, such that the astigmatic eye is fitted with an apodized single-vision lens, then the astigmatic eye can be fitted with an apodized single-vision lens having a refractive error label power corresponding to the actual refractive error correction of the astigmatic eye. An apodized single-vision lens with an apodization distribution can reduce the aberrations across the entire wavefront of the lens wearer, allowing a single-vision lens with a refractive error label power corresponding to the refractive error correction of the astigmatic eye to be fitted to the astigmatic eye while still providing sufficient refractive error correction to achieve acceptable or improved vision.

[0021] In another exemplary aspect, a method is provided for fitting a group of contact lenses to a patient with astigmatism, the group comprising a plurality of lenses, each having a spherical power to substantially correct a refractive error corresponding to a unique refractive error label power. The method includes determining a refractive error correction and a cylinder error correction for the astigmatic eye based on the refractive error and cylinder error in the astigmatic eye of the contact lens wearer. In response to determining that the cylinder error correction for the astigmatic eye is ≤1.25D, the method includes selecting a first lens from a first subgroup of lenses to fit the astigmatic eye, the first lens having a refractive error label power associated with the determined refractive error correction. In response to determining that the cylinder error correction for the astigmatic eye is >1.25D, the method includes selecting a second lens from a second subgroup of lenses to fit the astigmatic eye, the second lens having a refractive error label power corresponding to the determined refractive error correction and a cylinder error label power corresponding to the determined cylinder error correction. The first subgroup of lenses in the plurality of lenses each includes a single-vision lens that also has an apomorphic distribution. The second subgroup of lenses in the plurality of lenses each includes a non-apoptotic toric lens that also has a cylindrical power to substantially correct the cylindrical error corresponding to the single cylindrical error label power of >1.25 diopters (D).

[0022] In another exemplary aspect, a contact lens assembly is provided for correcting the vision of an astigmatic eye in a contact lens wearer. The contact lens assembly includes a plurality of lenses, each having a spherical power to substantially correct a refractive error corresponding to a unique refractive error label power. A first sub-group of lenses each has a first optical zone having a first central axis and a first radius extending from the first central axis to the edge of the first lens, and each of the first sub-group lenses includes a single-vision lens also having an apodization distribution. A second sub-group of lenses each includes a non-apodization toric lens, which also has a cylindrical power to substantially correct a cylindrical error corresponding to a unique cylindrical error label power >1.25 diopters (D). The apodization distribution in each lens of the first subgroup includes a first transmission zone and a second transmission zone, the first transmission zone allowing 100% transmission from a first central axis to a first radius of about 0.7897 mm, the second transmission zone having less than 100% transmission, and wherein such transmission decreases with increasing first radius.

[0023] Additional features and advantages will be set forth in the following detailed description and will be apparent in part to those skilled in the art from the description, or will be recognized by practice of the aspects as described in the written description, its claims, and the accompanying drawings.

[0024] It should be understood that the above general description and the following detailed description are merely exemplary and are intended to provide an overview or framework for understanding the nature and features of the claims.

[0025] The accompanying drawings are included to provide a further understanding and are incorporated in and form a part of this specification. The drawings illustrate one or more aspects and, together with the description, serve to explain the principles and operation of those aspects. Attached Figure Description

[0026] The above and other features and advantages of this disclosure will become apparent from the following more specific description of aspects of this disclosure as illustrated in the accompanying drawings.

[0027] Figure 1A and Figure 1B These are schematic diagrams of astigmatism and normal eyes, respectively. Figure 2 This is a graph illustrating how the average eye's exemplary spherical aberration (SPHA) varies with diopter (D) compared to a conventional SPHA with a spherical lens. Figure 3 This is an exemplary simulation graph illustrating how visual acuity (VA) varies with convergence and divergence in astigmatic eyes wearing toric lenses and spherical equivalent lenses. Figure 4This is an illustration of an exemplary apodization single-vision lens, which includes an exemplary non-Gaussian apodization transmission distribution that filters light transmission relative to the radius of the apodization single-vision lens, and can be used as a spherical lens or spherical equivalent lens for astigmatic eyes to provide refractive error correction. Figure 5A It is possible Figure 4 A graph illustrating an exemplary non-Gaussian apodization transmission distribution provided in an apodization single-vision lens; Figure 5B yes Figure 5A The formula for how the non-Gaussian apodization transmission distribution varies according to the radius of the apodization single-vision lens; Figures 6A to 6D illustrate similar single-vision lenses without aberration. Figure 4 The graphs of exemplary VA for apotropy single-vision lenses and exemplary non-potropy toric lenses, where all VAs vary according to convergence and divergence; Figure 7A This is a table illustrating exemplary differences in the VA differences of astigmatic eyes with prescription refractive errors and cylinder errors when worn: (1) Apomorphic single-vision lenses with apomorphic distribution (e.g., similar to Figure 4 (1) Apomorphic single-vision lenses in which the apomorphic distribution has spherical power corresponding to the spherical equivalent power of the prescription refractive error; (2) compared to the case when wearing non-apomorphic toric lenses with spherical power and cylindrical power corresponding to the prescription refractive error and astigmatism error. Figure 7B This is a table illustrating exemplary differences in the VA differences of astigmatic eyes with prescription refractive errors and cylinder errors when worn: (1) Apomorphic single-vision lenses with apomorphic distribution (e.g., similar to Figure 4 (1) In the case of apomorphic single-vision lenses, the apomorphic distribution has spherical power corresponding to the spherical power of the prescription refractive error; (2) compared to the case when wearing non-apoptotic toric lenses with spherical power and cylindrical power corresponding to the prescription refractive error and astigmatism error; and Figure 8 This is an exemplary contact lens assembly for correcting the vision of patients with astigmatism, wherein the contact lens assembly includes: a first sub-group of lenses, the first sub-group of lenses being non-Gaussian apodization single-vision lenses, similar to... Figure 4 The apodized single-vision lens has a spherical power and a non-Gaussian apodized transmission distribution selected for astigmatic eyes, and its cylindrical power is greater than the specified cylindrical error label power; and a second sub-group of lenses, which is a non-apodized toric lens, has a spherical power and a cylindrical power selected for astigmatic eyes, and its cylindrical power is greater than the specified cylindrical error label power; Figure 9This is a flowchart illustrating an exemplary fitting process for fitting lenses from a contact lens group to the astigmatic eyes of a toric patient based on refractive error correction and cylinder error correction requirements, wherein the contact lens group includes a first subgroup of lenses and a second subgroup of lenses, the first subgroup of lenses being apodized single-vision lenses having a spherical power and apodization distribution selected for the astigmatic eye, and a cylinder error correction less than a specified cylinder error label power, and the second subgroup of lenses being non-apodized toric lenses having a spherical power for correcting the refractive error of the astigmatic eye and a cylinder power greater than a specified cylinder error label power for correcting cylinder error.

[0028] Figure 10 This is an illustration of an exemplary apodization single-vision lens, which includes an exemplary Gaussian apodization transmission distribution, the non-Gaussian apodization transmission distribution filtering light transmission relative to the radius of a spherical lens, and can be used as a spherical lens or spherical equivalent lens for astigmatic eyes to provide refractive error correction. Figure 11A It is possible Figure 10 A graph of another exemplary Gaussian apodization transmission distribution with a centrally flat transmission region is provided in an apodization single-vision lens. Figure 11B yes Figure 11A The formula for how the Gaussian apodization transmission distribution varies according to the radius of the apodization single-vision lens; Figure 12 Examples of single-vision lenses without distortion. Figure 10 The graphs show exemplary VA curves for apotropy single-vision lenses and exemplary non-apoptotic toric lenses, with all VA varying according to convergence and divergence; and Figure 13 This is an exemplary contact lens assembly for correcting the vision of patients with astigmatism, wherein the contact lens assembly includes: a first sub-group of lenses, the first sub-group of lenses being Gaussian apodization single-vision lenses, similar to... Figure 10 The first is a Gaussian apodized single-vision lens with spherical power and Gaussian apodized transmission distribution selected for astigmatic eyes, and its cylindrical error correction is less than the specified cylindrical error label power; and the second sub-lens is a non-apodized toric lens with spherical power and cylindrical power selected for astigmatic eyes, and its cylindrical error correction is greater than the specified cylindrical error label power. Detailed Implementation

[0029] The aspects disclosed herein include methods for fitting astigmatic contact lens sets, which include apodized single-vision lenses for lower cylinder error correction and toric lenses for higher cylinder error correction. Related astigmatic contact lens sets are disclosed. In an exemplary aspect, an astigmatic contact lens set is provided, comprising a first subgroup (i.e., one or more) of lenses that are apodized single-vision lenses available in various prescriptions, having spherical power and apodization distribution for refractive error correction. The contact lens set also includes a second subgroup (i.e., one or more) of lenses that are non-apodized toric lenses available in various prescriptions, having spherical power for refractive error correction and cylindrical power for cylinder error correction. Astigmatic patients can be fitted with lenses from the corresponding first and second subgroups of lenses in the contact lens set, including single-vision and toric lenses, according to their refractive error correction and cylinder error correction prescriptions.

[0030] Figure 3 This is an exemplary simulation graph 300 illustrating how the visual acuity (VA) (in -10log minimum resolution angle (MAR) of an astigmatic eye wearing a toric lens and a spherical equivalent lens varies with convergence and divergence. Figure 3 The VA performance curve 302 in the figure is the average defocus VA of ten (10) astigmatic patients, with refractive error correction of -3D and cylinder error correction of 0.75D. Figure 3 The VA performance curve 304 in the figure represents the VA performance of the same group of patients fitted with spherical equivalent contact lenses. Spherical equivalence, as a spherical power value, is derived by obtaining the patient's actual refractive power correction requirement and adding a number equal to a proportion (e.g., half) of their actual cylindrical power requirement. Figure 3 As shown, the VA performance curve 304 for toric patients fitted with spherical equivalent lenses is lower than that for toric patients fitted with toric lenses 302. This is because patients fitted with spherical equivalent lenses do not receive adequate correction for their actual spherical or cylindrical power requirements. Toric patients fitted with spherical equivalent lenses are likely to have VA degradation relative to the clinically significant (e.g., >0.5 line -10 logMAR) VA degradation they would have with toric lenses. However, the benefit of spherical equivalent lenses for the wearer compared to toric lenses is that spherical lenses are generally cheaper and more comfortable. The inclusion of a stabilizing mechanism in the peripheral lens area of ​​a toric lens to maintain proper lens orientation can reduce contact lens comfort.

[0031] In this regard, in an exemplary aspect, the aspects disclosed herein include apomorphic single-vision lenses from a first subgroup of lenses in the contact lens set being provided for a patient with astigmatic eyes having a lower cylinder error (e.g., ≤1.25 diopters (D)) than the specified cylinder error label power of the contact lens set. Non-apoptotic toric lenses from a second subgroup of lenses in the contact lens set are provided for a patient with a higher cylinder error (e.g., >1.25 diopters (D)) than the specified cylinder error label power of the contact lens set. The apomorphic single-vision lenses in the contact lens set are apomorphic lenses that include an apomorphic distribution that reduces or masks transmitted light through the peripheral area of ​​the spherical lens to reduce the effective pupil size of the patient. This reduces the overall wavefront aberration of lens wearers fitted with such apomorphic single-vision lenses and has the effect of improving visual acuity in astigmatic patients with minimal or no compromise in visual acuity (VA) for astigmatic patients with a cylinder error equal to or lower than the specified cylinder error label power. For example, as disclosed herein, contact lens families have been developed that include apodization single-vision lenses to correct visual acuity in astigmatic eyes with a cylinder error correction of up to 1.25 diopters (D) as a specified cylinder error label power, where the VA trade-off is minimal or nonexistent. Therefore, a large number of patients with astigmatic eyes may be able to be fitted with single-vision lenses from the contact lens family that provide an acceptable VA and enhanced comfort for the astigmatic patient with a cylinder error higher than the specified cylinder error label power. This could avoid or reduce the need for toric lenses to be fitted to astigmatic patients with cylinder errors up to the specified cylinder error label power, which may be less desirable due to lower comfort (e.g., due to their stabilization mechanism) and / or higher cost.

[0032] Therefore, in the contact lens group under discussion, if a patient with astigmatism has a cylinder error correction of less than the specified cylinder error (e.g., ≤1.25D), the astigmatic eye can be fitted with an apodized single-vision lens from the first subgroup of lenses. This apodized single-vision lens is more comfortable to wear and provides visual acuity with minimal or no compromise in VA. This allows a larger number of patients with astigmatism to be fitted with single-vision lenses from the contact lens group that provide acceptable VA and enhanced comfort, and whose astigmatic eye has a cylinder error greater than the specified cylinder error label power. However, if a patient with astigmatism prefers toric lenses and / or has a cylinder error correction greater than the specified cylinder error label power of the contact lens group (e.g., >1.25D), the astigmatic eye can be fitted with a toric lens from the second subgroup of lenses. This toric lens has a refractive error correction label power and a cylinder error label power corresponding to the correction requirements of the astigmatic eye.

[0033] In this respect, Figure 4 This is an illustration of another exemplary apodization single-vision lens 400, which has refractive error correction and includes an exemplary apodization distribution 402, which is a non-Gaussian apodization transmission distribution. The non-Gaussian apodization single-vision lens 400 is an example of an apodization single-vision lens that can be provided for a patient with an astigmatic eye having a lower cylinder error (e.g., ≤1.25 diopters (D)) than a specified cylinder error label power of the contact lens group. The non-Gaussian apodization single-vision lens 400 can be used as a spherical lens or spherical equivalent lens for astigmatic eyes to provide refractive error correction. The anterior surface 404 or posterior surface 406 of the optical zone 408 of the non-Gaussian apodization single-vision lens 400 may have spherical power to provide refractive error correction according to the spherical power distribution provided in the non-Gaussian apodization single-vision lens 400.

[0034] like Figure 4 As shown, the apodization distribution 402 in the non-Gaussian apodization single-vision lens 400 filters light transmission through the optical region 408 of the non-Gaussian apodization single-vision lens 400 relative to a radius r from its central axis C1. In this example, the non-Gaussian apodization transmission distribution 402 includes a first transmission region 410(1) in the optical region 408, which lies between the central axis C1 and a second radius r2 of the optical region 408. This first transmission region is constant and has a flat top to provide a constant 100% (or approximately 100%) light transmission through the optical region 408. For example, the first radius r1 can be approximately 0.7897 millimeters (mm). The non-Gaussian apodization transmission distribution 402 also provides a second transmission region 410(2) in the optical region 408 between the second radius r2 and the third radius r3 of the optical region 408. This second transmission region has a curved distribution to progressively reduce the light transmission of the non-Gaussian apodization single-beam lens 400 as the radius toward the edge 412 of the optical region 408 increases. The non-Gaussian apodization transmission distribution 402 also provides a third transmission region 410(3) in the optical region 408 between the third radius r3 and the fourth radius r4 (at the edge 412). This third transmission region has a curved distribution to progressively reduce the light transmission through the optical region 408 to the fourth radius r4 of the non-Gaussian apodization single-beam lens 400.

[0035] Figure 5A This is a transmission curve 500 of an exemplary non-Gaussian apodization transmission distribution 502, which can be used as... Figure 4 The apodization distribution 402 in the non-Gaussian apodization single-vision lens 400 is provided. For example... Figure 5AAs shown, transmission curve 500 plots the percentage of light transmitted according to a radius r from the central axis C1. The non-Gaussian apodization transmission distribution 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 distribution 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 transmitted light decreases as the radius becomes 2.0 mm. The non-Gaussian apodization transmission distribution 502 also includes a third transmission region 504(2) extending beyond the central axis C1 to a radius exceeding 2.0 mm, where the percentage of transmitted light is 0%. Figure 5B yes Figure 5A Formula 510 for the light transmission (T) (T / r) varying according to radius (r) in the exemplary non-Gaussian transmission apodization distribution 502.

[0036] Non-apodimetric toric lenses from the second subgroup of the contact lens group are provided for patients with astigmatic eyes having a higher cylindrical error (e.g., >1.25 diopters (D)) than the specified cylindrical error label power of the contact lens group. The second subgroup may include one or more lenses for patients with astigmatic eyes having a higher cylindrical error than the specified cylindrical error label power of the contact lens group. Apodimetric single-vision lenses in the contact lens group are apodimetric lenses that include an apodimetric distribution, which reduces or masks transmitted light through the peripheral area of ​​the spherical lens to reduce the patient's effective pupil size. This reduces the overall wavefront aberration of lens wearers fitted with such apodimetric single-vision lenses and has the effect of improving visual acuity in astigmatic patients with minimal or no compromise in visual acuity (VA) for those with a cylindrical error equal to or less than the specified cylindrical error label power. For example, as disclosed herein, contact lens families have been developed that include apodization single-vision lenses to correct visual acuity in astigmatic eyes with a cylinder error correction of up to 1.25 diopters (D) as a specified cylinder error label power, where the VA trade-off is minimal or nonexistent. Therefore, a large number of patients with astigmatic eyes may be able to be fitted with single-vision lenses from the contact lens family that provide an acceptable VA and enhanced comfort for the astigmatic patient with a cylinder error higher than the specified cylinder error label power. This could avoid or reduce the need for toric lenses to be fitted to astigmatic patients with cylinder errors up to the specified cylinder error label power, which may be less desirable due to lower comfort (e.g., due to their stabilization mechanism) and / or higher cost.

[0037] Figures 6A to 6D are curves 600A to 600D, illustrating for patient wearers with various cylindrical errors and cylindrical powers (in toric lenses), based on convergence (D) similar single-vision lenses without apomorphism (VA_Base), and non-Gaussian apomorphic single-vision lenses (e.g., similar to...). Figure 4 The exemplary VA (-10logMAR) of the non-Gaussian apodized single-vision lens 400 (VA_Apod) and the exemplary non-apodized toric lens (VA_Max).

[0038] Figure 6A shows the VA curve 602A for a patient with a cylinder error of 1.0D fitted with a single-vision lens without apodization (VA_BaseA), and for a patient fitted with a single-vision lens with non-Gaussian apodization (e.g., similar to...). Figure 4 Figure 602B shows the VA curves for patients wearing non-Gaussian apodized single vision lenses (VA_ApodA) and Figure 602C shows the VA curves for patients fitted with non-gaussian apodized toric lenses (VA_MaxA) with a cylindrical power of 0.75D. All VA curves vary according to convergence (D). As shown in Figure 6A, the VA improvement of the non-gaussian apodized toric lens (VA_MaxA) with a cylindrical power of 0.75D exceeds 0.5 lines compared to the non-gaussian single vision lens (VA_BaseA). Therefore, VA can be improved by fitting patients with non-gaussian apodized toric lenses (VA_maxA) with a cylindrical power of 0.75D. However, also as shown in Figure 6A, non-gaussian apodized single vision lenses (e.g., similar to...)... Figure 4 The non-Gaussian apoda single-vision lens 400 (VA_ApodA) offers additional VA improvement compared to the non-apoda toric lens (VA_maxA) with a cylinder power of 0.75D. Therefore, by prescribing a spherical equivalent apoda single-vision lens (VA_ApodA) (e.g., similar to...) for patients with a cylinder error of 0.75D... Figure 4 With the non-Gaussian apoplexy single-vision lens 400, patients not only enjoy an improved VA compared to the non-gaussian toric lens (VA_max) with 0.75D cylindrical power including a stabilizing mechanism, but also experience increased comfort.

[0039] As previously discussed, apodization single-vision lenses, including those with apodization distributions, reduce or block transmitted light through the peripheral area of ​​the optical zone, thereby reducing the patient's effective pupil size. This reduces the overall wavefront aberration in wearers fitted with such apodization single-vision lenses and has the effect of improving vision in patients with astigmatism, with minimal or no trade-off in VA for patients with astigmatism having a cylinder error of 0.75D.

[0040] Figure 6B shows the VA curve 604A for a patient with a cylinder error of 1.0D fitted with a single-vision lens without apodization (VA_BaseB), and for a patient fitted with a single-vision lens with non-Gaussian apodization 400 (e.g., similar to...). Figure 4 The graphs 604B and 600B show the VA curves for patients wearing non-Gaussian apodized single vision lenses (VA_ApodB) and patients fitted with non-apodized toric lenses (VA_maxB) with a cylindrical power of 0.75D, respectively. All VA curves vary according to convergence (D). As shown in Figure 6B, the VA improvement of the non-apodized toric lens (VA_maxB) with a cylindrical power of 0.75D is greater than 0.5 lines compared to the non-apodized single vision lens (VA_BaseB). Therefore, VA can be improved by fitting patients with non-apodized toric lenses (VA_maxB) with a cylindrical power of 0.75D. However, as also shown in Figure 6B, although non-Gaussian apodized single vision lenses (e.g., similar to...) can improve VA, the VA of the non-apodized single vision lens (VA_maxB) with a cylindrical power of 0.75D can also improve VA. Figure 4 The non-Gaussian apodized single-vision lens 400 (VA_ApodB) did not provide VA improvement compared to the non-gaussian toric lens (VA_maxB) with a cylindrical power of 0.75D, but the VA difference between these lenses was less than 0.5 lines of VA. Therefore, fitting a non-Gaussian apodized single-vision lens (VA_ApodB) (e.g., similar to...) to a patient with a cylindrical power of 0.75D is not recommended. Figure 4 In the case of non-Gaussian apoplexy single-vision lenses (400), patients can enjoy increased comfort compared to non-apoplexy toric lenses (VA_maxB) with a cylindrical power of 0.75D, which include a stabilizing mechanism, where the VA trade-off is very small or minimal.

[0041] Figure 6C shows the VA curves for a patient with a cylinder error of 1.25D fitted with a single-vision lens without apodization (VA_BaseC) 606A, and for a patient fitted with a single-vision lens with non-Gaussian apodization (e.g., similar to Figure 4 The graph 606B shows the VA curves for patients wearing non-Gaussian apodized single vision lenses (VA_ApodC) and the graph 606C shows the VA curves for patients fitted with non-gaussian apodized toric lenses (VA_maxC) with a cylindrical power of 1.25D. All VA curves vary according to convergence (D). As shown in Figure 6C, the VA improvement of the non-gaussian apodized toric lens (VA_maxC) with a cylindrical power of 1.25D exceeds 0.8 lines compared to the non-gaussian single vision lens (VA_BaseC). Therefore, VA can be improved by fitting patients with non-gaussian apodized toric lenses (VA_maxC) with a cylindrical power of 1.25D. However, as also shown in Figure 6C, although non-gaussian apodized single vision lenses (e.g., similar to...) can improve VA, the VA of the non-gaussian apodized single vision lenses (e.g., similar to...) can also improve VA. Figure 4 The non-Gaussian apodized single-vision lens 400 (VA_ApodC) did not provide VA improvement compared to the non-gaussian toric lens (VA_maxC) with a cylindrical power of 1.25D, but the VA difference between these lenses was less than 0.5 rows of VA. Therefore, fitting non-Gaussian apodized single-vision lenses (VA_ApodC) (e.g., similar to...) to patients with a 1.25D cylindrical power error is not recommended. Figure 4 In the case of non-Gaussian apodized single-vision lenses (VA_ApodC), patients can enjoy increased comfort compared to non-gaussian toric lenses (VA_maxC) with a 1.25D cylindrical power, including a stabilizing mechanism, where the VA tradeoff is very small or minimal. Furthermore, for patients with a 1.25D cylindrical error, non-Gaussian apodized single-vision lenses (VA_ApodC) can be fitted (e.g., similar to...). Figure 4 The non-Gaussian apodized single-vision lens 400 can achieve at least 0.5 lines of VA improvement relative to a single-vision lens without apodization (VA_BaseC).

[0042] Figure 6D shows the VA curve 608A for a patient with a cylinder error of 1.5D fitted with a single-vision lens without apodization (VA_BaseC), and for a patient fitted with a single-vision lens with non-Gaussian apodization 400 (e.g., similar to...). Figure 4 The graphs 608B and 600D show the VA curves for patients wearing non-Gaussian apodized single vision lenses (VA_ApodD) and patients fitted with non-apodized toric lenses (VA_maxD) with a cylindrical power of 1.25D, respectively. All VA curves vary according to convergence (D). As shown in Figure 6D, the VA improvement of the non-apodized toric lens (VA_maxD) with a cylindrical power of 1.25D is greater than 0.5 lines compared to the non-apodized single vision lens (VA_BaseD). Therefore, VA can be improved by fitting patients with non-apodized toric lenses (VA_maxD) with a cylindrical power of 1.25D. However, as also shown in Figure 6D, although non-Gaussian apodized single vision lenses (e.g., similar to...) can improve VA, the VA of the non-apodized single vision lens (VA_maxD) with a cylindrical power of 1.25D can also improve VA. Figure 4 The non-Gaussian apodized single-vision lens 400 (VA_ApodD) did not provide VA improvement compared to a non-gaussian toric lens (VA_maxD) with a cylindrical power of 1.25D, but the VA difference between these lenses was less than approximately 0.6 rows of VA. Therefore, fitting a non-Gaussian apodized single-vision lens (VA_ApodD) (e.g., similar to...) to a patient with a 1.5D cylindrical power error... Figure 4In the case of a non-Gaussian apodization single-vision lens 400, patients can enjoy increased comfort compared to a non-gaussian toric lens with a 1.25D cylindrical power, including a stabilizing mechanism, where the VA tradeoff is very small (e.g., more than 0.5 lines). A reduction in VA by more than 0.5 lines may not be acceptable design performance, and therefore in this example, it might be desirable to fit toric patients with a non-Gaussian apodization single-vision lens with a cylindrical error of up to 1.25D as the cylindrical error label power. However, this may still be an improvement over a non-gaussian single-vision lens that may only be suitable for fitting patients with a reduced cylindrical error (e.g., only up to 0.75D cylindrical error) and subsequently require fitting toric lenses.

[0043] This is also Figure 7A The figure shows a table 700 illustrating exemplary differences in the VA (-10logMAR) of an astigmatic eye with a 4mm pupil size and a prescription refractive error correction of -3D and a cylinder error of 702 when worn: (1) Single-vision lenses with apodization distribution (e.g., similar to Figure 4 (1) Non-Gaussian apomorphic single-vision lens 400), the apomorphic distribution having spherical power corresponding to the spherical equivalent power of the prescription refractive error; (2) compared to the case when wearing a non-apomorphic toric lens 704 with spherical power and cylindrical power corresponding to the prescription refractive error and astigmatism error. Figure 7A As shown, for a cylinder error of 0.75D 702, the non-Gaussian apodization single-vision lens improves the VA by 0.1 lines compared to the toric lens 704. For a cylinder error of 1.0D 702, the non-Gaussian apodization single-vision lens reduces the VA by only 0.1 lines compared to the toric lens 704. For a cylinder error of 1.25D 702, the non-Gaussian apodization single-vision lens reduces the VA by only -0.4 lines compared to the toric lens 704. For a cylinder error of 1.5D 702, the non-Gaussian apodization single-vision lens reduces the VA by 0.6 lines compared to the toric lens 704. A reduction in VA by more than 0.5 lines may be unacceptable, and therefore in this example, it might be desirable to use a non-Gaussian apodization single-vision lens with a cylinder error up to 1.25D as the specified cylinder error label power limit for fitting toric patients. However, this is still superior to non-apoptotic single-vision lenses, which may only be used to fit patients with reduced cylinder error (e.g., only up to 0.75D cylinder error) and then require the fitting of toric lenses.

[0044] Therefore, if an astigmatic eye is determined to have a cylinder error correction of less than the specified cylinder error label power (e.g., ≤1.25D), such that the astigmatic eye is fitted with an apodized single-vision lens, the astigmatic eye can be fitted with an apodized single-vision lens as a spherical equivalent lens instead of a toric lens, and still achieve an improved VA or an acceptable compromise of VA to benefit increased wearing comfort.

[0045] Alternatively, if it is determined that the astigmatic eye has a cylinder error correction of less than the specified cylinder error label power (e.g., ≤1.25D), such that the astigmatic eye is fitted with an apodization single-vision lens, then the astigmatic eye may be fitted with an apodization single-vision lens as an actual spherical lens (not a spherical equivalent lens) rather than a toric lens, and still achieve an improved VA or an acceptable compromise of VA to facilitate increased wearing comfort.

[0046] In this respect, Figure 7B Table 706 illustrates exemplary differences in the VA of an astigmatic eye with prescription refractive error and cylinder error 702 when worn: (1) Single-vision lenses with apodization distribution (e.g., similar to Figure 4 (1) The non-Gaussian apophorous single-vision lens 400, whose spherical power (aspheric equivalent lens) corresponds to the actual spherical power of the prescription refractive error; (2) compared to the case when wearing a non-apophorous toric lens 704 whose spherical power and cylindrical power correspond to the prescription refractive error and astigmatism error. Figure 7B As shown, for a cylinder error of 0.75D 702, the VA (visual acuity) of the non-Gaussian apodization single-vision lens is not reduced compared to the toric lens 704. For a cylinder error of 1.0D 702, the VA of the non-Gaussian apodization single-vision lens is reduced by only 0.2 lines compared to the toric lens 704. For a cylinder error of 1.25D 702, the VA of the non-Gaussian apodization single-vision lens is reduced by only 0.5 lines compared to the toric lens 704. For a cylinder error of 1.5D 702, the VA of the non-Gaussian apodization single-vision lens is reduced by 0.6 lines compared to the toric lens 704. A reduction in VA by more than 0.5 lines may be unacceptable, and therefore in this example, it might be desirable to use a non-Gaussian apodization single-vision lens with a cylinder error up to 1.25D as the specified cylinder error label power limit for fitting toric patients. However, this is still superior to non-apoptotic single-vision lenses, which may only be used to fit patients with reduced cylinder error (e.g., only up to 0.75D cylinder error) and then require the fitting of toric lenses.

[0047] Because it has been determined that apodization single-vision lenses can be provided for fitting patients with toric refractive errors up to a specified cylinder error label power (e.g., ≤1.25D) and still achieve improved VA or an acceptable trade-off between VA and toric lenses, but for the benefit of increased wearing comfort, it may be desirable to provide a contact lens set comprising such apodization single-vision lenses for different refractive error correction prescriptions, rather than such Gaussian apodization single-vision lenses for different cylinder error correction prescriptions up to a specified cylinder error label power. In this respect, Figure 8 This is an exemplary contact lens assembly 800 for correcting the vision of patients with astigmatism. The contact lens assembly includes a first sub-assembly of non-Gaussian apodization single-vision lenses 802, similar to... Figure 4 The contact lens group 800 includes a non-Gaussian apodized single-vision lens 400 having a spherical power and Gaussian apodized transmission distribution selected for astigmatic eyes, wherein the cylindrical power is less than a specified cylindrical error label power (e.g., ≤1.25D). A first subgroup of non-Gaussian apodized single-vision lenses 802 may include one or more lenses having a spherical power and non-Gaussian apodized transmission distribution selected for astigmatic eyes with a cylindrical power less than a specified cylindrical error label power. The contact lens group 800 also includes a second subgroup of toric lenses 804, which are non-apodized toric lenses having a spherical power and cylindrical power selected for astigmatic eyes with a cylindrical error greater than a specified cylindrical error label power (e.g., >1.25D). The second subgroup of toric lenses 804 may include one or more lenses that are non-apodimetric toric lenses with spherical and cylindrical powers selected for an astigmatic eye having a cylindrical error greater than a specified cylindrical error label power. The second subgroup of toric lenses 804 is provided when the VA (visual atrophy) compromise for fitting an apodimetric single-vision lens to an astigmatic eye is greater than desired or unacceptable to the patient.

[0048] like Figure 8As shown, the first subgroup of non-Gaussian apodization single-vision lenses 802 includes non-Gaussian apodization single-vision lenses that include stock units (SKUs) designed as spherical equivalent lenses or spherical lenses for fitting patients with toric surfaces having a cylinder error up to a specified cylinder error label power (e.g., ≤1.25D). The first subgroup of non-Gaussian apodization single-vision lenses 802 also includes myopia-correcting non-Gaussian apodization single-vision lenses 802M for various myopia refractive powers from -12D to -1D and hyperopia-correcting non-Gaussian apodization single-vision lenses 802H for various hyperopia refractive powers from +1D to +9D. It should be noted that any desired number of SKUs of myopic non-Gaussian apodized single-vision lenses 802M and hyperopic non-Gaussian apodized single-vision lenses 802H for various corresponding myopic and hyperopic spherical powers can be provided in the first subgroup of non-Gaussian apodized single-vision lenses 802.

[0049] Similarly, Figure 8 As shown, the second subgroup of toric lenses 804 includes stock units (SKUs) for different cylindrical powers such as 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 subgroup of toric lenses 804 have a stabilizing mechanism for maintaining rotational stability of the toric lenses 804 on the eye. The second subgroup 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 from +9D. It should be noted that any desired number of SKUs of myopia-correcting toric lenses 804M and hyperopia-correcting toric lenses 804H for various corresponding myopia and hyperopia spherical powers can be provided in the second subgroup of toric lenses 804.

[0050] Figure 9 This illustrates how to adjust contact lens groups (such as...) based on the required refractive error correction and cylinder error correction. Figure 8 The flowchart illustrates an exemplary fitting process 900 for fitting lenses from a contact lens group 800 to an astigmatic patient. As discussed below, the fitting process 900 for fitting lenses from a contact lens group to a patient's astigmatic eye includes fitting lenses from a first subgroup of lenses to the astigmatic eye, which is an apomorphic single-vision lens (e.g., similar to...). Figure 8 The first subgroup of apodization single-vision lenses 802 has similar characteristics to... Figure 4The non-Gaussian apodization single-vision lens 400 in the contact lens group has a spherical power related to the refractive error of the astigmatic eye, and an apodization distribution selected for fitting in an astigmatic eye having a cylinder error less than a specified cylinder error label power (e.g., ≤1.25D). The fitting process 900 of fitting a lens from the contact lens group to an astigmatic eye also includes fitting a second subgroup of lenses (e.g., similar to...) Figure 8 The second subgroup of toric lenses (804) is fitted to the patient. This second subgroup of lenses is a non-apodimetric toric lens, which has a spherical power and a cylindrical power selected for astigmatic eyes, with a cylindrical error correction greater than a specified cylindrical error label power (e.g., >1.25D), and has a spherical power to substantially correct the refractive error corresponding to the astigmatic eye. When Figure 9 The fitting process 900 requires that when fitting an astigmatic eye with an apodization single-vision lens in the first subgroup of lenses, the astigmatic eye can be fitted with an apodization single-vision lens as a spherical equivalent lens related to the refractive error of the astigmatic eye or an actual spherical lens corresponding to the refractive error of the astigmatic eye.

[0051] In this respect, regarding Figure 8 The contact lens assembly 800 was discussed Figure 9 The fitting process in 900 is described, but this is not limiting. In this respect, such as... Figure 9 As shown, the fitting process 900 includes determining the refractive error correction and cylinder error correction for the contact lens wearer's astigmatic eye based on the refractive error and cylinder error in the astigmatic eye. Figure 9 (See box 902 in the image). In response to determining that the cylinder error correction of the astigmatic eye is less than or equal to a specified cylinder error label power (e.g., ≤1.25D), Figure 9 (in frame 904), the fitting process 900 includes selecting a first apodization single vision lens 802 from the first subgroup of apodization single vision lenses 802 to fit an astigmatic eye having a refractive error label power associated with the determined refractive error correction ( Figure 9 (See box 906 in the text). The refractive error label power associated with the determined refractive error correction can be the spherical equivalence of the determined refractive error correction for astigmatic eyes or directly corresponding to the spherical power of the determined refractive error correction for astigmatic eyes.

[0052] However, in response to determining that the cylinder error correction for an astigmatic eye is greater than the specified cylinder error label power (e.g., >1.25D), Figure 9(in frame 908), the fitting process 900 includes selecting a second toroidal lens 804 from the second subgroup of toroidal lenses 804 to fit the astigmatic eye, the second toroidal lens having a refractive error label power corresponding to the determined refractive error correction of the astigmatic eye and a cylinder error label power corresponding to the determined cylinder error correction of the astigmatic eye. Figure 9 (Box 910 in the middle).

[0053] It should be noted that this procedure can be performed on one or both of the astigmatism in the right eye (OD) and the left eye (OS). Figure 9 The fitting process 900 in this context. In this regard, the fitting process 900 can determine the correction of the OD refractive error and / or OS refractive error and the correction of the OD cylinder error and / or OS cylinder error for the contact lens wearer based on the OD refractive error and / or OS refractive error and the OD cylinder error and / or OS cylinder error in the corresponding OD astigmatic eye and / or OS astigmatic eye. In response to determining that the correction of the OD cylinder error and / or OS cylinder error for the corresponding OD astigmatic eye and / or OS astigmatic eye is less than or equal to a specified cylinder error label power (e.g., ≤1.25D), the fitting process includes selecting a first apodization single vision lens 802 from a first subgroup of apodization single vision lenses 802 to fit to an OD astigmatic eye and / or OS astigmatic eye having a refractive error label power associated with the determined correction of the corresponding OD refractive error and / or OS refractive error. Figure 9 (See box 906 in the text). The refractive error label power associated with the corresponding determined OD refractive error correction and / or OS refractive error correction can be the spherical equivalence of the determined refractive error correction for OD astigmatic eyes and / or OS astigmatic eyes, or the spherical power directly corresponding to the determined corresponding OD refractive error correction and / or OS refractive error correction for OD astigmatic eyes and / or OS astigmatic eyes.

[0054] However, in response to determining that the OD cylinder error correction and / or OS cylinder error correction of the corresponding OD astigmatic eye and / or OS astigmatic eye is greater than a specified cylinder error label power (e.g., >1.25D), the fitting process includes selecting a second toroidal lens 804 from the second subgroup of toroidal lenses 804 to be fitted to the astigmatic eye, the second toroidal lens having a refractive error label power corresponding to the determined corresponding OD refractive error correction and / or OS refractive error correction of the corresponding OD astigmatic eye and / or OS astigmatic eye, and having a cylinder error label power corresponding to the determined corresponding OD cylinder error correction and / or OS cylinder error correction of the astigmatic eye.

[0055] In addition, if a patient with toric facial complains of being fitted with apodization single-vision lenses (such as...) Figure 8If the VA of the astigmatic eye is reduced in the first subgroup of apodization single-vision lenses 802, then when its cylinder error is less than or equal to the specified cylinder error label power (e.g., ≤1.25D), the astigmatic eye can be refitted with a toroidal lens with a cylinder power corresponding to the cylinder error of the astigmatic eye. In this regard, for example, Figure 8 The second subgroup of toric lenses 804 can be extended with a separate third lens group, provided that the third lens group has a refractive error correction SKU with a cylindrical power less than or equal to the specified cylindrical error label power (e.g., ≤1.25D), which can also be suitable for astigmatic eyes. The patient can then determine whether the VA obtained using the toric lenses in the third lens group is acceptable.

[0056] Additionally, if a patient with toric vision complains about the toric lenses (such as those fitted to their astigmatic eyes)... Figure 8 If the second subgroup of toric lenses 804 causes discomfort when its cylinder error is greater than or equal to the specified cylinder error label power (e.g., >1.25D), then apodization single-vision lenses (such as...) can be used. Figure 8 The first subgroup of apomorphic single-vision lenses 802 is used to refit the astigmatic eye. The patient can then determine whether the VA obtained through the apomorphic single-vision lens 802 is acceptable.

[0057] Figure 10 This is an illustration of another exemplary single-vision lens 1000, which has refractive error correction and includes an exemplary apodization distribution 1002, which is a Gaussian apodization transmission distribution. The Gaussian apodization single-vision lens 1000 is an example of a Gaussian apodization single-vision lens that can be provided for a patient with an astigmatic eye having a lower cylinder error (e.g., ≤1.25 diopters (D)) than a specified cylinder error label power of the contact lens group. The Gaussian apodization single-vision lens 1000 can be used as a spherical lens or spherical equivalent lens for astigmatic eyes to provide refractive error correction. The anterior surface 1004 or posterior surface 1006 of the optical zone 1008 of the Gaussian apodization single-vision lens 1000 may have spherical power to provide refractive error correction according to the spherical power distribution provided in the Gaussian apodization single-vision lens 1000.

[0058] like Figure 10As shown, the apodization distribution 1002 in the Gaussian apodization single-vision lens 1000 filters light transmission through the optical region 1008 of the Gaussian apodization single-vision lens 1000 relative to a radius r from its central axis C2. In this example, the Gaussian apodization transmission distribution 1002 includes a first transmission region 1010(1) in the optical region 1008 between the central axis C2 and the radius r5 of the optical region 1008, which has a curved distribution to progressively reduce the light transmission of the Gaussian apodization single-vision lens 1000 as the radius increases toward the edge 1012 of the optical region 1008.

[0059] Figure 11A This is a transmission curve 1100 of an exemplary Gaussian apodization transmission distribution 1002 (with a flat top / transmission at the center), which can be used as... Figure 10 The apodization distribution 1102 in the Gaussian apodization single-vision lens 1000 is provided. (As...) Figure 11A As shown, the transmission curve 1100 plots the percentage of light transmitted according to a radius r5 from the central axis C2. The Gaussian apodization transmission distribution 1102 includes a first transmission region 1104(1), in which light is transmitted 100% from the central axis C2 to a radius of approximately 0.8 mm, and then decreases to approximately 0.5% (e.g., 0.497%) at a radius of approximately 2.8 mm from the central axis C2. Figure 11B It is based on Figure 11A Formula 1106 shows the transmittance (T) (T / r) of the radius (r) of the exemplary Gaussian apodization transmission distribution 1102. It should be noted that, alternatively, a regular Gaussian apodization transmission distribution can be provided in apodization single-vision lenses that do not have a centrally flat top.

[0060] Figure 12 The diagram shows the VA curve 1202A for a patient with a cylinder error of 0.75D fitted with a single-vision lens without apodization (VA_Base), and for a patient fitted with a single-vision lens with Gaussian apodization (e.g., similar to...). Figure 10 Graph 1200 shows the VA curves for patients wearing Gaussian apodized single-vision lenses 1000 (VA_Apod) and VA curves for patients wearing non-apodized toric lenses with a cylindrical power of 0.75D (VA_Max). All VA curves vary according to convergence (D). Figure 12 As shown, compared to a single-vision lens without apophthalmia (VA_BaseA), a non-apoptotic toric lens with a cylindrical power of 0.75D (VA_MaxA) improves VA by more than 0.6 lines. Therefore, VA can be improved by fitting the patient with a non-apoptotic toric lens with a cylindrical power of 0.75D (VA_MaxA). However, as also... Figure 12As shown, although Gaussian apodization single-vision lenses (e.g., similar to...) Figure 10 The Gaussian apodized single-vision lens 1000 (VA_Apod) did not provide VA improvement compared to a non-apodized toric lens (VA_Max) with a cylindrical power of 0.75D, but the VA difference between these lenses was less than 0.5 lines of VA. Therefore, fitting a Gaussian apodized single-vision lens (VA_Apod) (e.g., similar to...) to a patient with a 0.75D cylindrical power error... Figure 10 In the case of Gaussian apodized single-vision lenses (VA_Apod), patients can enjoy increased comfort compared to non-apoptotic toric lenses (VA_MaxB) with a cylinder power of 0.75D, including a stabilizing mechanism, where the VA tradeoff is very small or minimal. As an example, patients with a cylinder error of up to or equal to 1.25D can utilize Gaussian apodized single-vision lenses (VA_Apod) (e.g., similar to...). Figure 10 The Gaussian apodized single-vision lens 1000 offers increased comfort compared to non-apodized toric lenses (VA_MaxB) with a stable mechanism, where the VA tradeoff is very small or minimal. Furthermore, for patients with a cylinder error of 0.75D, non-Gaussian apodized single-vision lenses (VA_ApodA) (e.g., similar to...) are fitted. Figure 10 The Gaussian apodization single-vision lens 1000 can achieve at least 0.5 lines of VA improvement relative to a single-vision lens without apodization (VA_BaseA).

[0061] Because it has been established that Gaussian apodization single-vision lenses can be provided for fitting patients with toric refractive errors up to a specified cylinder error label power (e.g., ≤1.25D) and still achieve improved VA or an acceptable trade-off between VA and toric lenses, but for the benefit of increased wearing comfort, it may be desirable to provide a contact lens set comprising such Gaussian apodization single-vision lenses for different refractive error correction prescriptions, rather than such Gaussian apodization single-vision lenses for different cylinder error correction prescriptions up to a specified cylinder error label power. In this regard, Figure 13 This is an exemplary contact lens assembly 1300 for correcting the vision of patients with astigmatism. The contact lens assembly includes a first sub-group of Gaussian apodization single-vision lenses 1302, which are apodization single-vision lenses, similar to... Figure 10 The Gaussian apodization single-vision lens 1000 has a spherical power and Gaussian apodization transmission distribution selected for astigmatic eyes, wherein the cylindrical power is less than a specified cylindrical error label power (e.g., ≤1.25D). A first subgroup of Gaussian apodization single-vision lenses 1302 may include one or more lenses having a spherical power and Gaussian apodization transmission distribution selected for astigmatic eyes with a cylindrical power less than a specified cylindrical error label power. As another example, Figure 9 The fitting process in 900 can also be used Figure 13 The contact lens assembly 1300 is used to perform this.

[0062] like Figure 13 As shown, the first subgroup of Gaussian apodization single-vision lenses 1302 includes Gaussian apodization single-vision lenses comprising stock units (SKUs) designed as spherical equivalent lenses or spherical lenses for fitting patients with toric surfaces having a cylindrical error up to a specified cylindrical error label power (e.g., ≤1.25D). The first subgroup of Gaussian apodization single-vision lenses 1302 also includes myopia-correcting Gaussian apodization single-vision lenses 1302M for various myopia refractive powers from -12D to -1D and hyperopia-correcting Gaussian apodization single-vision lenses 1302H for various hyperopia refractive powers from +1D to +9D. It should be noted that any desired number of SKUs of myopic corrective Gaussian ...

[0063] Contact lens assembly 1300 also includes previously mentioned Figure 8 The second subgroup of toric lenses 804 discussed is part of the contact lens group 800. This second subgroup of toric lenses is a non-apodial toric lens with spherical and cylindrical powers selected for an astigmatic eye having a cylindrical error greater than a specified cylindrical error label power (e.g., >1.25D). The second subgroup of toric lenses 804 may include one or more lenses with spherical and cylindrical powers selected for an astigmatic eye having a cylindrical error greater than a specified cylindrical error label power. The second subgroup of toric lenses 804 is provided when the VA (visual asymmetry) compromise for fitting an apodial single-vision lens to an astigmatic eye is greater than the patient's desired or acceptable level.

[0064] It should be noted that although the examples disclosed above include lens sets comprising: (1) an apodized single-vision lens in a first subgroup of lenses in the contact lens set, the apodized single-vision lens being provided for a patient's astigmatic eye having a lower cylinder error (e.g., ≤1.25 diopters (D)) less than the specified cylinder error label power of the contact lens set; and (2) a non-apodized toric lens in a second subgroup of lenses in the contact lens set, the non-apodized toric lens being provided for a patient's astigmatic eye having a higher cylinder error (e.g., >1.25 diopters (D)) greater than the specified cylinder error label power of the contact lens set, this is not limiting. The specified cylinder error label power is disclosed as an example of 1.25D, but the specified cylinder error label power can also be adjusted from 1.25D. For example, the specified cylinder error label power can be any desired cylinder error label power, including but not limited to those between 1.25D and 2.0D, such as 1.5D, 1.75D, and 2.0D as examples. Apodized single-vision lenses with apodized distributions used in a patient's astigmatic eye (having a lower cylinder error than such alternatively specified cylinder error label power) can still reduce or mask transmitted light through the peripheral area of ​​the spherical lens to still reduce the patient's effective pupil size, thereby reducing the overall wavefront aberration of the lens wearer. The effect is to improve the visual acuity of the astigmatic patient while minimizing or eliminating any trade-off in the astigmatic patient's visual acuity (VA).

[0065] Furthermore, in another exemplary aspect, the second subgroup of lenses provided to a patient with an astigmatic eye having a higher cylindrical error than the specified cylindrical error label of the contact lens group need not be non-apodimetric toric lenses. In contrast to non-apodimetric toric lenses, such a second subgroup of lenses can be apodimetric toric lenses that provide both toric correction and apodimetric distribution. One beneficial effect of such a contact lens group with a second subgroup of apodimetric toric lenses used in a patient with an astigmatic eye having a higher cylindrical error than the specified cylindrical error label of the contact lens is an aesthetic benefit for bilateral patients whose eyes have cylindrical errors higher and lower than the specified cylindrical error label, such that each eye of the patient will be fitted with a lens from each of the first and second subgroups. By apodizing both the first and second subgroups, the lenses will appear similar in each eye, unlike bilateral wearers who will appear to have a clear lens in one eye and a darker apodimetric lens in the other. Furthermore, as a second subgroup of apodized toric lenses used in a patient's astigmatic eye with a higher cylinder error than the specified cylinder error label power, it can also have the benefit of reducing higher-order spherical aberrations in a higher-cylinder-corrected eye compared to cylinder error correction in a large pupil. Note that the aspects described above relate to exemplary contact lens groups, contact lens pairs, and individual contact lenses, but such examples are not limited to contact lenses but can be applied to any type of lens and associated contact lens groups and pairs. It should also be noted that other apodization distributions can be provided for the apodized single-vision lenses discussed herein, and the apodized single-vision lenses discussed herein are not limited to the non-Gaussian and Gaussian apodization transmission distributions disclosed herein.

[0066] It is particularly noteworthy that the lens designs of this disclosure can be incorporated into many different contact lenses made of many materials. Specifically, the lens designs of this disclosure can be used in any of the contact lenses described herein, including but not limited to daily wear soft contact lenses, rigid gas-permeable contact lenses, bifocal contact lenses, toric contact lenses, and hybrid contact lenses. Furthermore, although this disclosure is described in relation to contact lenses, it is particularly important to note that the concepts of this disclosure can be applied to spectacle lenses, intraocular lenses, corneal inlays, and inlays.

[0067] It should be understood that this disclosure is not limited to the specific aspects disclosed, and modifications and other aspects are intended to be included within the scope of the appended claims and their equivalents. Although specific terminology is used herein, it is used only in a general and descriptive sense and not for limiting purposes. Those skilled in the art will understand the concepts of this disclosure and recognize the application of concepts not specifically set forth herein when reading the following description in conjunction with the accompanying drawings. The aspects set forth below represent the information necessary for those skilled in the art to practice this disclosure and illustrate the best mode of practice. It should be understood that these concepts and applications fall within the scope of this disclosure and the appended claims. Those skilled in the art to which this disclosure pertains will conceive of numerous modifications and other embodiments of this disclosure set forth herein, having benefited from the teachings presented in the foregoing description and the associated drawings. While shown and described in what is believed to be the most practical and specific aspect disclosed, modifications and other aspects are also intended to be included within the scope of the appended claims. It will be apparent to those skilled in the art that changes can be made to the specific designs and methods described and shown, and these changes can be used without departing from the spirit and scope of this disclosure.

[0068] Specific implementation examples are described in the following numbered clauses: 1. A method for fitting a contact lens assembly for a patient with astigmatism, the contact lens assembly comprising a plurality of lenses, each of the plurality of lenses having a spherical power to substantially correct a refractive error corresponding to a single refractive error label power, the method comprising: The refractive error correction and cylinder error correction for the astigmatic eye are determined based on the refractive error and cylinder error in the astigmatic eye of the contact lens wearer; In response to determining that the cylinder error correction for the astigmatic eye is ≤1.25D: A first lens is selected from the first subgroup of lenses to be fitted to the astigmatic eye, the first lens having a refractive error label power associated with the determined refractive error correction; and In response to determining that the cylinder error correction of the astigmatic eye is >1.25D: A second lens is selected from the second subgroup of lenses to be fitted to the astigmatic eye, the second lens having a refractive error label power corresponding to the determined refractive error correction and a cylinder error label power corresponding to the determined cylinder error correction. in: The first subgroup of lenses in the plurality of lenses each includes a single-vision lens that also has an apodization distribution; and The second subgroup of lenses in the plurality of lenses each includes a non-apomorphic toric lens, which also has a cylindrical power to substantially correct the cylindrical error corresponding to a single cylindrical error label power of >1.25 diopters (D).

[0069] 2. The method according to Clause 1, wherein selecting the first lens from the first subgroup of lenses comprises: The first lens is selected from the first subgroup of lenses to be fitted to the astigmatic eye, the first lens having a refractive error label power of spherical equivalence with a determined refractive error correction and a determined cylinder error correction.

[0070] 3. The method according to Clause 1, wherein selecting the first lens from the first subgroup of lenses comprises: The first lens is selected from the first subgroup of lenses to be fitted to the astigmatic eye, the first lens having a refractive error label power corresponding to the determined refractive error correction.

[0071] 4. The method according to any one of Clauses 1 to 3, further comprising, in response to determining that the cylinder error correction of the astigmatic eye is ≤1.25D: Receive feedback from the wearer of the contact lens, the feedback being based on visual acuity perceived when the selected first lens is worn in the astigmatic eye; and In response to the feedback indicating that the perceived visual acuity is unacceptable for the contact lens wearer: A third lens is selected from the third subgroup of the plurality of lenses to be fitted to the astigmatic eye, the third lens having a second refractive error label power corresponding to the determined refractive error correction and a cylinder error label power corresponding to the determined cylinder error correction. Each lens in the third subgroup includes a non-apomorphic toric lens, which also has a cylindrical power to substantially correct the corresponding... ≤ The unique cylindrical error label for 1.25D is the cylindrical error of the optical power.

[0072] 5. The method according to any one of Clauses 1 to 4, further comprising, in response to determining that the cylinder error correction of the astigmatic eye is >1.25D: Receive feedback from the wearer of the contact lens, the feedback being based on the comfort felt when the selected second lens is worn in the astigmatic eye; and In response to the feedback indicating that the perceived comfort level is acceptable to the wearer of the contact lens: A first lens is selected from the first subgroup of the plurality of lenses to be fitted to the astigmatic eye, the first lens having a refractive error label power associated with the determined refractive error correction.

[0073] 6. The method according to any one of Clauses 1 to 5, wherein: Determining the refractive error correction for the astigmatic eye of the contact lens wearer includes: Determine the OD refractive error correction for the right (OD) astigmatic eye of the contact lens wearer; and Determine OS refractive error correction for the left (OS) astigmatic eye of the contact lens wearer; Determining the cylinder error correction for the wearer of the contact lens includes: Determine the OD cylinder error correction for the aforementioned OD astigmatic eye; and Determine the OS cylinder error correction for the OS astigmatic eye; In response to determining that the cylinder error correction for the OD astigmatic eye is ≤1.25D: A first lens is selected from the first subgroup of lenses for the OD astigmatic eye to be fitted to the OD astigmatic eye, the first lens having a refractive error label power associated with the determined OD refractive error correction; In response to determining that the cylinder error correction for the OD astigmatic eye is >1.25D: A second lens is selected from the second subgroup of lenses to be fitted to the OD astigmatic eye, the second lens having a refractive error label power corresponding to the determined OD refractive error correction and a cylinder error label power corresponding to the determined OD cylinder error correction. In response to determining that the cylinder error correction for the OS astigmatic eye is ≤1.25D: A third lens is selected from the first subgroup of lenses to be fitted to the OS astigmatic eye, the third lens having a refractive error label power associated with the determined OS refractive error correction; and In response to determining that the cylinder error correction for the OS astigmatic eye is >1.25D: A fourth lens is selected from the second subgroup of lenses to be fitted to the OS astigmatic eye, the fourth lens having a refractive error label power corresponding to the determined OS refractive error correction and a cylinder error label power corresponding to the determined OS cylinder error correction.

[0074] 7. The method according to any one of Clauses 1 to 6, wherein each lens in the first subgroup of lenses has a non-Gaussian apodization transmission distribution.

[0075] 8. The method according to any one of Clauses 1 to 8, wherein the apodization distribution in each lens of the first subgroup of lenses is configured to allow 100% transmission from the central axis to a radius of about 0.7897 mm, and a second transmission zone having less than 100% transmission, and wherein such transmission decreases with increasing radius.

[0076] 9. The method according to any one of Clauses 1 to 8, wherein each lens in the first subgroup of lenses has a central axis and a non-Gaussian apodization transmission distribution, the non-Gaussian apodization transmission distribution comprising: in: r = radius from the central axis.

[0077] 10. The method according to any one of Clauses 1 to 6, wherein each lens in the first subgroup of lenses has a central axis and a Gaussian apodization transmission distribution.

[0078] 11. The method according to any one of Clauses 1 to 6 or Clause 10, wherein each lens in the first subgroup of lenses has a central axis and a Gaussian apodization transmission distribution, the Gaussian apodization transmission distribution comprising: in: r = radius from the central axis.

[0079] 12. The method according to any one of Clauses 1 to 11, wherein the non-apophthalmic toric lens in each of the second subgroup of lenses further comprises a stabilizing mechanism for maintaining rotational stability of the non-apophthalmic toric lens on the eye.

[0080] 13. A contact lens assembly for correcting the vision of an astigmatic eye in a contact lens wearer, the contact lens assembly comprising: Multiple lenses, each having a spherical power to substantially correct a refractive error corresponding to the power of a single refractive error label; in: Each of the plurality of lenses in the first sub-group has a first optical region, the first optical region having a first central axis and a first radius extending from the first central axis to the edge of the first lens, and each of the first sub-groups of lenses includes a single-vision lens further having an apodization distribution; and The second subgroup of lenses in the plurality of lenses each includes a non-apomorphic toric lens, which also has a cylindrical power to substantially correct the cylindrical error corresponding to a single cylindrical error label power of >1.25 diopters (D). The apodization distribution in each lens of the first subgroup includes a first transmission zone and a second transmission zone, the first transmission zone allowing 100% transmission from the first central axis to a first radius of approximately 0.7897 mm, the second transmission zone having less than 100% transmission, and wherein such transmission decreases with increasing first radius.

[0081] 14. The contact lens group as described in Clause 13, wherein the apodization distribution of each first lens in the first subgroup of lenses comprises a non-Gaussian apodization transmission distribution.

[0082] 15. The contact lens assembly according to Clause 14, wherein the non-Gaussian apodization transmission distribution includes: in: r = radius from the first central axis.

[0083] 16. A contact lens group according to any one of Clauses 13 to 15, wherein the front surface of each lens in the first subgroup of lenses has the spherical power.

[0084] 17. A contact lens group according to any one of Clauses 13 to 15, wherein the rear surface of each lens in the first subgroup of lenses has the spherical power.

[0085] 18. The contact lens assembly according to any one of Clauses 13 to 15, wherein: Each lens in the second sub-group has the spherical power on either its front or rear surface; and The other of the front or rear surface of each lens in the second subgroup has the cylindrical power.

[0086] 19. The contact lens group according to any one of Clauses 13 to 18, wherein the non-apophthalmic toric lens in each of the lenses in the second subgroup further includes a stabilizing mechanism for maintaining rotational stability of the non-apophthalmic toric lens on the eye.

[0087] 20. A contact lens group according to any one of Clauses 13 to 19, wherein the front surface of each lens in the second subgroup of lenses has the cylindrical power.

[0088] 21. A contact lens group according to any one of Clauses 13 to 19, wherein the rear surface of each lens in the second subgroup of lenses has the cylindrical power.

[0089] 22. The contact lens group according to any one of Clauses 13 to 21 further includes a third subgroup of lenses among the plurality of lenses, each of the third subgroups comprising a non-apod toric lens, each of the non-apod toric lenses having a second cylindrical power to substantially correct for cylindrical errors corresponding to a second cylindrical error label power of ≤1.25D.

Claims

1. A method for fitting a contact lens assembly for a patient with astigmatism, the contact lens assembly comprising a plurality of lenses, each of the plurality of lenses having a spherical power to substantially correct a refractive error corresponding to a single refractive error label power, the method comprising: The refractive error correction and cylinder error correction for the astigmatic eye are determined based on the refractive error and cylinder error in the astigmatic eye of the contact lens wearer; In response to determining that the cylinder error correction for the astigmatic eye is ≤1.25D: A first lens is selected from the first subgroup of lenses to be fitted to the astigmatic eye, the first lens having a refractive error label power associated with the determined refractive error correction; and In response to determining that the cylinder error correction of the astigmatic eye is >1.25D: A second lens is selected from the second subgroup of lenses to be fitted to the astigmatic eye, the second lens having a refractive error label power corresponding to the determined refractive error correction and a cylinder error label power corresponding to the determined cylinder error correction. in: The first subgroup of lenses in the plurality of lenses each includes a single-vision lens that also has an apodization distribution; and The second subgroup of lenses in the plurality of lenses each includes a non-apomorphic toric lens, which also has a cylindrical power to substantially correct the cylindrical error corresponding to a single cylindrical error label power of >1.25 diopters (D).

2. The method of claim 1, wherein selecting the first lens from the first subgroup of lenses comprises: The first lens is selected from the first subgroup of lenses to be fitted to the astigmatic eye, the first lens having a refractive error label power of spherical equivalence with a determined refractive error correction and a determined cylinder error correction.

3. The method of claim 1, wherein selecting the first lens from the first subgroup of lenses comprises: The first lens is selected from the first subgroup of lenses to be fitted to the astigmatic eye, the first lens having a refractive error label power corresponding to the determined refractive error correction.

4. The method of claim 1, further comprising, in response to determining that the cylinder error correction of the astigmatic eye is ≤1.25D: Receive feedback from the wearer of the contact lens, the feedback being based on visual acuity perceived when the selected first lens is worn in the astigmatic eye; and In response to the feedback indicating that the perceived visual acuity is unacceptable for the contact lens wearer: A third lens is selected from the third subgroup of the plurality of lenses to be fitted to the astigmatic eye, the third lens having a second refractive error label power corresponding to the determined refractive error correction and a cylinder error label power corresponding to the determined cylinder error correction. Each lens in the third subgroup includes a non-apomorphic toric lens, which also has a cylindrical power to substantially correct the corresponding... ≤ The unique cylindrical error label for 1.25D is the cylindrical error of the optical power.

5. The method of claim 1, further comprising, in response to determining that the cylinder error correction of the astigmatic eye is >1.25D: Receive feedback from the wearer of the contact lens, the feedback being based on the comfort felt when the selected second lens is worn in the astigmatic eye; and In response to the feedback indicating that the perceived comfort level is acceptable to the wearer of the contact lens: A first lens is selected from the first subgroup of the plurality of lenses to be fitted to the astigmatic eye, the first lens having a refractive error label power associated with the determined refractive error correction.

6. The method according to claim 1, wherein: Determining the refractive error correction for the astigmatic eye of the contact lens wearer includes: Determine the OD refractive error correction for the right (OD) astigmatic eye of the contact lens wearer; and Determine OS refractive error correction for the left (OS) astigmatic eye of the contact lens wearer; Determining the cylinder error correction for the wearer of the contact lens includes: Determine the OD cylinder error correction for the aforementioned OD astigmatic eye; and Determine the OS cylinder error correction for the OS astigmatic eye; In response to determining that the cylinder error correction for the OD astigmatic eye is ≤1.25D: A first lens is selected from the first subgroup of lenses for the OD astigmatic eye to be fitted to the OD astigmatic eye, the first lens having a refractive error label power associated with the determined OD refractive error correction; In response to determining that the cylinder error correction for the OD astigmatic eye is >1.25D: A second lens is selected from the second subgroup of lenses to be fitted to the OD astigmatic eye, the second lens having a refractive error label power corresponding to the determined OD refractive error correction and a cylinder error label power corresponding to the determined OD cylinder error correction. In response to determining that the cylinder error correction for the OS astigmatic eye is ≤1.25D: A third lens is selected from the first subgroup of lenses to be fitted to the OS astigmatic eye, the third lens having a refractive error label power associated with the determined OS refractive error correction; and In response to determining that the cylinder error correction for the OS astigmatic eye is >1.25D: A fourth lens is selected from the second subgroup of lenses to be fitted to the OS astigmatic eye, the fourth lens having a refractive error label power corresponding to the determined OS refractive error correction and a cylinder error label power corresponding to the determined OS cylinder error correction.

7. The method of claim 1, wherein each lens in the first subgroup of lenses has a non-Gaussian apodization transmission distribution.

8. The method of claim 1, wherein the apodization distribution in each of the first subgroup lenses is configured to allow 100% transmission from the central axis to a radius of about 0.7897 mm, and a second transmission zone having less than 100% transmission, and wherein such transmission decreases with increasing radius.

9. The method of claim 1, wherein each lens in the first subgroup of lenses has a central axis and a non-Gaussian apodization transmission distribution, the non-Gaussian apodization transmission distribution comprising: in: r = radius from the central axis.

10. The method of claim 1, wherein each lens in the first subgroup of lenses has a central axis and a Gaussian apodization transmission distribution.

11. The method of claim 1, wherein each lens in the first subgroup of lenses has a central axis and a Gaussian apodization transmission distribution, the Gaussian apodization transmission distribution comprising: in: r = radius from the central axis.

12. The method of claim 1, wherein the non-apod toric lens in each of the second sub-group of lenses further comprises a stabilizing mechanism for maintaining rotational stability of the non-apod toric lens on the eye.

13. A contact lens assembly for correcting the vision of an astigmatic eye in a contact lens wearer, the contact lens assembly comprising: Multiple lenses, each having a spherical power to substantially correct a refractive error corresponding to the power of a single refractive error label; in: Each of the plurality of lenses in the first sub-group has a first optical region, the first optical region having a first central axis and a first radius extending from the first central axis to the edge of the first lens, and each of the first sub-groups of lenses includes a single-vision lens further having an apodization distribution; and The second subgroup of lenses in the plurality of lenses each includes a non-apomorphic toric lens, which also has a cylindrical power to substantially correct the cylindrical error corresponding to a single cylindrical error label power of >1.25 diopters (D). The apodization distribution in each lens of the first subgroup includes a first transmission zone and a second transmission zone, the first transmission zone allowing 100% transmission from the first central axis to a first radius of approximately 0.7897 mm, the second transmission zone having less than 100% transmission, and wherein such transmission decreases with increasing first radius.

14. The contact lens group of claim 13, wherein the apodization distribution of each first lens in the first subgroup comprises a non-Gaussian apodization transmission distribution.

15. The contact lens assembly of claim 14, wherein the non-Gaussian apodization transmission distribution comprises: in: r = radius from the first central axis.

16. The contact lens group of claim 13, wherein the front surface of each lens in the first subgroup of lenses has the spherical power.

17. The contact lens group of claim 13, wherein the rear surface of each lens in the first subgroup of lenses has the spherical power.

18. The contact lens assembly according to claim 13, wherein: Each lens in the second sub-group has the spherical power on either its front or rear surface; and The other of the front or rear surface of each lens in the second subgroup has the cylindrical power.

19. The contact lens assembly of claim 13, wherein the non-apophthalmic toric lens in each of the lenses in the second sub-assembly further comprises a stabilizing mechanism for maintaining rotational stability of the non-apophthalmic toric lens on the eye.

20. The contact lens group of claim 13, wherein the front surface of each lens in the second subgroup of lenses has the cylindrical power.

21. The contact lens group of claim 13, wherein the rear surface of each lens in the second subgroup of lenses has the cylindrical power.

22. The contact lens group of claim 13, further comprising a third subgroup of lenses, each of the third subgroups comprising a non-apod toric lens, each of the non-apod toric lenses having a second cylindrical power to substantially correct a cylindrical error corresponding to a second cylindrical error label power of ≤1.25D.

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