Method and system for determining ophthalmic elements tailored to the wearer

Abstract

The present invention relates to a method implemented by computer means for determining ophthalmic elements tailored to a wearer with a prescription, the method comprising at least: a) providing an initial set of ophthalmic elements, wherein each ophthalmic element of the initial set is tailored to the wearer's prescription; b) for each ophthalmic element of the initial set, calculating the value of each criterion of a plurality of criteria including a plurality of lens criteria and / or a plurality of wearer criteria; c) generating an optimal set of ophthalmic elements by calculating Pareto-optimal ophthalmic elements among the ophthalmic elements of the initial set based on the value of each criterion; and d) determining a final ophthalmic element for the wearer from the optimal set of ophthalmic elements based on a selected criterion based on the wearer's preference.

Description

Technology Field

[0001] The present invention relates to a method and system for determining ophthalmic elements tailored to a wearer. Furthermore, the present invention relates to a method for providing an ophthalmic lens to a wearer from such ophthalmic elements. Background Technology

[0002] Optical lenses are generally determined to be manufactured according to the wearer's specifications. For example, in the case of ophthalmic lenses for vision correction or improvement, the lenses are determined based on a wearer's prescription that corresponds to the wearer's visual requirements. Additionally, other requirements related to aesthetics and comfort, such as the shape and size of the eyeglass frame supporting the lenses, may be considered when determining the ophthalmic lenses.

[0003] Since these requirements are generally antagonistic, they cannot all be satisfied simultaneously. Therefore, a compromise is necessary.

[0004] Nevertheless, numerous trade-offs are possible based on these requirements to fully customize ophthalmic lenses for the wearer, for example, by varying at least the optical design or the geometric structure of the lens.

[0005] Consequently, it is necessary to determine the most suitable compromise for the wearer among numerous options. The problem to be solved

[0006] The present invention aims to provide a method and system for determining ophthalmic elements tailored to a wearer that overcome the aforementioned defects and disadvantages. means of solving the problem

[0007] To this end, the present invention proposes a method implemented by computer means for determining ophthalmic elements tailored to a wearer with a prescription, and the method is at least,

[0008] a) a step of providing an initial set of ophthalmic elements, wherein each ophthalmic element of the initial set is tailored to the wearer's prescription;

[0009] b) For each ophthalmic element of the initial set, a step of calculating the value of each criterion of a plurality of criteria including a plurality of lens criteria and / or a plurality of wearer criteria;

[0010] c) generating an optimal set of ophthalmic elements by calculating Pareto-optimal ophthalmic elements among the ophthalmic elements of the initial set based on the value of each criterion; and

[0011] d) includes the step of determining the final ophthalmic element for the wearer from the optimal set of ophthalmic elements based on selected criteria based on the wearer's preference.

[0012] Advantageously, this method can provide ophthalmic elements by taking into account various requirements for the wearer, while ensuring that the determined ophthalmic elements are the best compromise that complies with the wearer's requirements.

[0013] Advantageously, Pareto-optimal optimization corresponds to the optimization of multiple criteria, where it is impossible to improve one criterion without compromising another.

[0014] In other words, this method provides a decision-making aid method for selecting a lens design or a lens from a set of possible compromises using selection criteria set at least partially by the user. The criteria may advantageously include optical criteria, surface criteria, and wearer criteria.

[0015] Furthermore, since all trade-offs can be calculated in advance, these decisions can be made in real time; that is, additional calculation steps are no longer required to select lenses tailored to the wearer or the final lens design.

[0016] Thanks to the present invention, after generating an optimal set of ophthalmic elements, that is, a set of possible compromises of ophthalmic elements, the wearer can advantageously select a final ophthalmic element from this optimal set of ophthalmic elements by improving at least one criterion by modifying the range of at least one criterion. Thus, the final ophthalmic element forms at least one of the best compromises of ophthalmic elements for the wearer.

[0017] According to additional embodiments that may be considered alone or in combination,

[0018] - Pareto Optimization: It is impossible to improve one criterion without compromising another.

[0019] - The method further includes the step of selecting at least two criteria from a plurality of criteria based on the wearer's preference, and the optimal set of ophthalmic elements is generated by calculating Pareto-optimal ophthalmic elements among the initial set of ophthalmic elements based on the values ​​of each selected criterion.

[0020] - An ophthalmic element is an ophthalmic lens or the optical design of an ophthalmic lens.

[0021] - An initial set of ophthalmic elements is provided from a database of predetermined ophthalmic elements.

[0022] - Each predetermined ophthalmic element is an ophthalmic element optimized for the wearer's prescription.

[0023] - Each ophthalmic element of the initial set is calculated based on a plurality of predetermined ophthalmic elements.

[0024] - Each ophthalmic element of the initial set is a linear combination of a plurality of predetermined ophthalmic elements;

[0025] - A database of M predetermined ophthalmic lens designs, for example, where 'i' is a progressive surface denoted by Di which is an integer from 1 to M, an initial set of ophthalmic lens designs can be generated by calculating each ophthalmic lens design.

[0026] Each new surface S is defined as follows: , with .

[0027] Each new surface S is a progressive surface when the ophthalmic lens design is selected to have the same inset and the same progressive length.

[0028] - Multiple lens standards include optical standards and / or surface standards, the optical standards relate to the optical parameters of the ophthalmic element, and the surface standards relate to the surface parameters of the surface of the ophthalmic element.

[0029] - Ophthalmic lenses are progressive ophthalmic lenses.

[0030] - The final ophthalmic element for the wearer is determined from the optimal set of ophthalmic elements according to the order of criteria selected by the wearer or eye care practitioner.

[0031] - The wearer criteria include at least information indicating the wearer's activity while the ophthalmic element is intended to be worn by the wearer.

[0032] - The initial set of ophthalmic elements includes at least 100 ophthalmic elements, preferably at least 500 ophthalmic elements, and more preferably 1000 ophthalmic elements.

[0033] Another object of the present invention is to a system for implementing a method for determining an ophthalmic element tailored to a wearer according to the present invention as described above, wherein the wearer has a prescription, and the system,

[0034] Memory; and

[0035] Includes a processor,

[0036] The processor,

[0037] A step of providing an initial set of ophthalmic elements, wherein each ophthalmic element of the initial set is tailored to the wearer's prescription;

[0038] For each ophthalmic element of an initial set, a step of calculating the value of each criterion of a plurality of criteria including a plurality of lens criteria and / or a plurality of wearer criteria;

[0039] A step of generating an optimal set of ophthalmic elements by calculating Pareto-optimal ophthalmic elements among the ophthalmic elements of an initial set based on the value of each criterion; and

[0040] To perform the step of determining the final ophthalmic element for the wearer from the optimal set of ophthalmic elements based on selected criteria based on the wearer's preference,

[0041] It is configured to execute program instructions stored in memory.

[0042] According to one embodiment, Pareto-optimal optimization makes it impossible to improve one criterion without compromising another criterion.

[0043] According to one embodiment, the system is configured so that a distant entity can access it remotely.

[0044] In addition, the present invention relates to a method for providing an ophthalmic lens to a wearer, wherein the method comprises:

[0045] - A step of providing wearer data including at least the wearer's prescription;

[0046] - A step of determining an ophthalmic element tailored to a wearer according to the method for determining an ophthalmic element tailored to a wearer according to the present invention as described above; and

[0047] - Includes the step of manufacturing an ophthalmic lens according to determined ophthalmic elements tailored to the wearer.

[0048] According to one embodiment, Pareto-optimal optimization makes it impossible to improve one criterion without compromising another criterion.

[0049] According to an additional aspect, the present invention also relates to a computer program product comprising one or more stored sequences of instructions that can access a process, wherein

[0050] When these instructions are executed by the processor, they cause the processor,

[0051] - A method for determining an ophthalmic element tailored to a wearer according to the present invention as described above; and / or

[0052] - Have the wearer implement the method of providing ophthalmic lenses.

[0053] The present invention also relates to a computer-readable storage medium on which a program is recorded, wherein the program causes a computer to execute at least one of the methods of the present invention.

[0054] In addition, the present invention relates to a device comprising a processor configured to store one or more sequences of instructions and to execute at least one of the following steps.

[0055] - A method for determining an ophthalmic element tailored to a wearer according to the present invention as described above; and / or

[0056] - Method of providing ophthalmic lenses to the wearer.

[0057] Unless otherwise specifically stated, as is evident in the following discussion, throughout the discussion of the specification, the use of terms such as “operation,” “calculation,” etc., is recognized as referring to the operation and / or process of a computer or arithmetic system, or a similar electronic arithmetic device, of manipulating and / or converting data expressed as a physical quantity within the registers and / or memory of the arithmetic system into other data similarly expressed as an electronic physical quantity within the memory, registers, or other such information storage, transmitting or display devices of the arithmetic system.

[0058] Embodiments of the present invention may include a device for performing the operations of this specification. This device may include a general-purpose computer or a digital signal processor (“DSP”) that may be specifically configured for a desired purpose or may be selectively activated or reconfigured by a computer program stored in the computer. Such computer program may be stored on a computer-readable storage medium such as a floppy disk, an optical disk, a CD-ROM, a magnetic-optical disk, a ROM, a RAM, an EPROM, an EEPROM, a magnetic or optical card, or any other type of disk suitable for storing electronic instructions and capable of being coupled to a computer system, but not limited thereto.

[0059] The processes and displays presented herein are not inherently related to any specific computer or other device. Various general-purpose systems may be used with programs according to the teachings of this specification, or it may be found convenient to construct more specialized devices to perform the desired method.

[0060] The desired structure for these various systems is shown in the description below. Furthermore, embodiments of the present invention are not described with reference to any specific programming language. It will be understood that the teachings of the present invention can be implemented as described herein using various programming languages. Effects of the invention

[0061] Included in the contents of the present invention. Brief explanation of the drawing

[0062] Now, embodiments of the present invention will be described merely as examples with reference to the following drawings. FIG. 1 is a flowchart of a method for determining an ophthalmic element tailored to a wearer according to the present invention. FIG. 2 is a flowchart of a method for determining an ophthalmic element tailored to a wearer according to another embodiment of the present invention. FIGS. 3 and 4 illustrate the results of a first embodiment and a second embodiment of the method according to the present invention. FIG. 5 illustrates a system for implementing a method for determining an ophthalmic element tailored to a wearer according to the present invention. FIG. 6 is a flowchart of a method for providing an ophthalmic lens to a wearer according to the present invention. The elements of the drawings are illustrated for simplicity and clarity and are not necessarily drawn to scale. For example, the dimensions of some elements of the drawings may be exaggerated relative to others to help improve understanding of embodiments of the invention. Specific details for implementing the invention

[0063] Referring to FIG. 1, the present invention relates to a method for determining an ophthalmic element tailored to a wearer. In practice, this method is implemented by computer means.

[0064] Preferably, the ophthalmic element is an ophthalmic lens or an optical design of an ophthalmic lens, and more specifically, the ophthalmic lens may be a progressive ophthalmic lens.

[0065] In the context of the present invention, the term "ophthalmic lens" may refer to an uncut lens or an eyeglass lens with edges formed to fit a specific eyeglass frame.

[0066] This term may also refer to the ophthalmic lens which may exhibit at least one added value, such as, for example, hue, polarization filtering, electrochromic properties, anti-reflective properties, or scratch-resistant properties, or may include a photochromic unit or a light guide unit, etc.

[0067] In the sense of the present invention, the ophthalmic element tailored to the wearer is an ophthalmic element suitable for the wearer's prescription.

[0068] The term "prescription" should be understood to mean, for example, a set of optical characteristics such as optical power, astigmatism, and prism deviation to correct the wearer's visual defect by a lens placed in front of the eye, and, where applicable, addition characteristics determined by an ophthalmologist or optometrist. For example, prescription data may include data for an eye with a refractive error.

[0069] For example, a prescription for progressive add-power lenses includes the refractive power and astigmatism values ​​along the axis for distance vision, and, where appropriate, the add-power value. The prescription data may include data for an emmetropic eye.

[0070] The fitting of ophthalmic lenses to the wearer's prescription must be verified at least at the optical reference point of each ophthalmic lens.

[0071] The method includes at least the following steps.

[0072] - Initial set provision step (S10),

[0073] - Reference value calculation step (S20),

[0074] - Optimal set generation step (S30), and

[0075] - Final ophthalmic element determination step (S40).

[0076] During the initial set provision step (S10), an initial set of ophthalmic elements is provided. Each ophthalmic element of the initial set is fitted to the wearer's prescription.

[0077] Preferably, the initial set of ophthalmic elements comprises at least 100 ophthalmic elements, preferably at least 500 ophthalmic elements, and more preferably 1,000 ophthalmic elements.

[0078] According to one embodiment, an initial set of ophthalmic elements is provided from a predetermined database of ophthalmic elements.

[0079] Advantageously, each predetermined ophthalmic element is an ophthalmic element optimized for the wearer's prescription. In other words, each specific ophthalmic element in a set of ophthalmic elements is designed to fit a specific wearer's prescription, but two ophthalmic elements in the set may not be designed to fit the same prescription. Therefore, a set of ophthalmic elements may include several different optical designs designed to fit prescriptions for eyes with refractive errors.

[0080] For example, a predetermined ophthalmic element may be a conventional ophthalmic lens. Such a conventional lens may be a lens calculated according to specific parameters.

[0081] Specific parameters may be unique ophthalmic element features (shape, width, etc.) or features related to the wearer's form.

[0082] Specific parameters may be related to the wearer's eye-lens distance or pantoscopic angle.

[0083] A specific parameter may be the maximum value of the width of the ophthalmic element contour for a myopic wearer or the minimum value of the width of the center of the ophthalmic element for a hyperopic wearer.

[0084] These existing lenses may be multiple lenses prior to the addition and optimization of specific functions, such as the addition of additional layers on the lens or surface treatment (e.g., surface treatment for blue light filtering). In this way, the method of determining suitable optical elements according to the wearer is cost-effective and enables variable possibilities for optimizing optical elements according to the wearer's needs.

[0085] Alternatively, each ophthalmic element of the initial set may be calculated based on a plurality of predetermined ophthalmic elements. For example, each ophthalmic element of the initial set may advantageously be a linear combination of a plurality of predetermined ophthalmic elements. The predetermined ophthalmic elements may also be conventional ophthalmic lenses.

[0086] A linear combination of multiple predetermined ophthalmic elements may be a linear combination of progressive planes to define a desired progressive plane based on the predetermined progressive planes without the need to redesign the progressive planes from the beginning.

[0087] For example, considering a database of M predetermined ophthalmic lens designs, for example, progressive surfaces denoted by Di where "i" is an integer from 1 to M, an initial set of ophthalmic lens designs can be generated by calculating each ophthalmic lens design, that is, each new surface (S) is calculated as follows. , Each new surface (S) is a progressive surface, for example, when an ophthalmic lens design is selected to have the same inset and the same progressive length.

[0088] Next, the back surface can be calculated for each surface (S) to arrive at a given prescription by taking into account several constraints, such as thickness and prism, for example.

[0089] Alternatively, each ophthalmic element of the initial set can be generated by optimization according to the wearer's at least visual requirements, that is, by varying some surface parameters while satisfying some constraints.

[0090] The constraints may be, for example, center thickness, edge thickness, and center prism, and the surface parameters of the lens to be varied may be, for example, progressive length, inset, material, progressive length at 85% of the add power, resegmentation of the progressive, astigmatism, kinematics between the anterior and posterior diopters, etc. Kinematics is a set of basic operations (rotation and translation) that enable the axis system reference to be changed from the anterior axis system to the posterior axis system.

[0091] Next, for each ophthalmic element of the initial set, step (S20) calculates the value of each criterion of a plurality of criteria. The plurality of criteria include a plurality of lens criteria and / or a plurality of wearer criteria. Some criteria may be selected by an eye care professional and / or a wearer.

[0092] A plurality of lens references advantageously include optical references and / or surface references. In the sense of the present invention, the optical reference relates to the optical parameters of the ophthalmic element, and the surface reference relates to the surface parameters of the surface of the ophthalmic element.

[0093] For example, optical criteria and surface criteria may be field width, peak value, position peak, and slope of optical criteria such as astigmatism, refractive power, and distortion.

[0094] In the context of the present invention, distortion is defined as an aberration that results in a straight line being imaged as a curve. In ophthalmic optics, "barrel" distortion occurs in negative lenses, whereas "pin-cushion" distortion occurs in positive lenses. This is inherent in the optical properties of simple positive or negative lenses. Distortion manifested as waves or ripples in the image of a line viewed through a lens far from the eye can be induced by local surface irregularities caused by improper processing (see Dictionary of Ophthalmic Optics by AH Keeney, RE Hagman and CJ Fratello, Butterworth-Hernemann 1995).

[0095] According to another example, optical and surface criteria may be, for example, robustness with respect to the magnification of the far-field power (FV) with respect to the wide-field angle. In this case, robustness may be defined as a criterion for measuring the variation in far-field power when the wearer's conditions (wide-field angle and Galbe angle) change.

[0096] According to other examples, optical and surface criteria may be related to binocular parameters, the geometric structure of the lens, etc.

[0097] Additionally, the optical standard may be a central visual optical standard (CVOC) group consisting of a prism deviation of central visual acuity, an ocular deviation, an object field of view of central visual acuity, an image field of view of central visual acuity, a magnification of peripheral visual acuity, or a variation of the preceding standard.

[0098] In one embodiment, the optical reference may also be a group of peripheral vision optical references (PVOCs) consisting of pupil field ray deviation, object vision of peripheral vision, image vision of peripheral vision, prism deviation of peripheral vision, magnification of peripheral vision, or a variation of the preceding reference.

[0099] The wearer criterion includes, in a favorable way, information indicating the wearer's activities, such as sports, driving, reading, indoor / outdoor activities, etc., at least while the wearer is intended to wear the ophthalmic element.

[0100] Advantageously, each wearer criterion can be linked to surface criteria and / or optical criteria. For example, criteria related to activities such as sports, driving, and reading can be linked to visual behaviors such as field width and astigmatism position peaks.

[0101] Therefore, the criteria for the wearer's activity can be defined as a linear combination of optical and surface criteria.

[0102] Wearer criteria may also be related to the wearer's visual behavior (eye movement, head movement, lowering eyes when reading, reading distance for different devices, etc.). These criteria can be inferred from the use of smart frames or, for example, provided by the wearer on a website.

[0103] During the optimal set generation step (S30), an optimal set of ophthalmic elements is generated by calculating Pareto-optimal ophthalmic elements among the ophthalmic elements of the initial set based on the value of each criterion.

[0104] Pareto optimality is an allocation of resources that cannot be reallocated to improve any one individual or preference criterion without worsening at least one individual or preference criterion. This means that, in the context of multi-goal optimization, also known as Pareto optimization, one criterion cannot be improved without compromising another.

[0105] In other words, the concept of Pareto optimality makes it possible to divide the set of possible ophthalmic elements into two. Therefore, the following can be distinguished.

[0106] - Can be improved uniformly: Can increase well-being of a specified standard without decreasing well-being of other standards.

[0107] - Things that cannot be improved uniformly: An increase in well-being according to a given standard implies a decrease in well-being according to at least one other standard.

[0108] What can be designated as Pareto-optimal is the ophthalmic element corresponding to this second case.

[0109] Therefore, thanks to the present invention, all designs for which there is no other design better in all criteria are identified and selected.

[0110] Next, during step (S40), the final ophthalmic element for the wearer is determined from the optimal set of ophthalmic elements based on selected criteria based on the wearer's preference. By doing so, the relative importance of the criteria can be adjusted, and the best compromise design can always be selected.

[0111] Preferably, the final ophthalmic element for the wearer is determined from an optimal set of ophthalmic elements based on an order of criteria selected by the wearer or an eye care professional.

[0112] For example, the wearer can align criteria related to their activities according to their preference or the time required to perform each activity.

[0113] Alternatively, this information can be inferred from questionnaires about the wearer's lifestyle or from wearable devices such as swatches or smartphone applications that provide data about the wearer's lifestyle.

[0114] According to another example, the wearer can mark or rate each selected criterion.

[0115] According to another example, the wearer can assign weights to each selected criterion, or the wearer can assign a predetermined number of points between the selected criteria.

[0116] According to another embodiment compatible with the previous embodiments, the method further comprises the step of selecting at least one criterion from a plurality of criteria based on the wearer's preference, and an optimal set of ophthalmic elements is generated by calculating Pareto-optimal ophthalmic elements from an initial set of ophthalmic elements based on the value of each selected criterion.

[0117] Now, an embodiment of the method according to the present invention will be described in detail below with reference to FIGS. 3 and FIGS. 4.

[0118] Example 1: Optical Reference and Surface Reference

[0119] Now, an embodiment of the method according to the present invention will be described in detail below.

[0120] Considering existing ophthalmic lens designs with M=5, each tailored to a wearer's prescription, N=1000 new ophthalmic lens designs can be generated by linear combinations of the 5 existing ophthalmic lens designs. Each new ophthalmic lens design is also tailored to a wearer's prescription.

[0121] 1,000 new ophthalmic lens designs are provided to form an initial set of ophthalmic elements during step (S10).

[0122] Next, six optical criteria are provided, including field width and resulting astigmatism for far vision (FV), intermediate vision (IV), and near vision (NV).

[0123] For each ophthalmic element of the initial set, the value of each criterion is calculated. Table 1 provides the calculated values ​​of the optical criteria for the lenses of the initial set.

[0124]

[0125] Table 1: Optical reference values ​​for ophthalmic elements of the initial set

[0126] Next, the optical reference value can be normalized. Figure 3 illustrates the result.

[0127] Therefore, among a very large set (1000) of ophthalmic lens designs, only the most appropriate ophthalmic lens design must be identified according to six selected criteria.

[0128] To this end, during step (30), an optimal set of ophthalmic elements is generated by calculating Pareto-optimal ophthalmic elements among the initial set of ophthalmic elements based on the value of each criterion.

[0129] Referring to Fig. 3, only three ophthalmic lens designs (D1, D2, and D3) are in the optimal set of ophthalmic elements. In fact, D1, D2, and D3 are considered the best compromise among the initial set of 1,000 ophthalmic lens designs.

[0130] Ophthalmic lens design (DN) is not included in the optimal set of ophthalmic elements because it cannot be considered a good compromise. In fact, all standard values ​​are at their lowest.

[0131] Next, at least one final ophthalmic element for the wearer from the optimal set of ophthalmic elements is determined based on criteria selected based on the wearer's preference.

[0132] Preferably, the final ophthalmic element for the wearer is advantageously determined from an optimal set of ophthalmic elements based on the order of criteria selected by the wearer.

[0133] For example, the wearer can select optical criteria and surface criteria according to their preference, as shown in Table 2, and select more orders of optical criteria and surface criteria.

[0134]

[0135] Table 2: Selection of Optical and Surface Criteria Based on Wearer Preference

[0136] For each compromise, that is, for each optimal ophthalmic lens design, a score is calculated based on a linear combination of wearer weights.

[0137] - D1 5.18;

[0138] - D2 4.9:

[0139] - D3 6.68.

[0140] In this example, therefore, the final ophthalmic factor determined for the wearer is D3.

[0141] Example 2: Wearer-based

[0142] In this example, as in Example 1, an initial set of 1,000 ophthalmic elements is provided during step (S10).

[0143] Next, four wearer criteria are provided, each of which relates to the wearer's activities while the wearer is intended to wear the ophthalmic element, such as driving, reading, sports, and computer.

[0144] For each ophthalmic element of the initial set, the value of each criterion is calculated. The normalized results are shown in Table 3.

[0145]

[0146] Table 3: User reference values ​​for ophthalmic elements of the initial set

[0147] During step (30), an optimal set of ophthalmic elements is generated by calculating Pareto-optimal ophthalmic elements among the initial set of ophthalmic elements based on the value of each criterion.

[0148] In the same manner as in Example 1, the optimal set of ophthalmic elements generated by calculating Pareto-optimal ophthalmic elements based on the value of each criterion includes the ophthalmic elements (D1, D2, and D3) of the initial set during step (30). Thus, D1, D2, and D3 are considered as the best compromise among the initial set of 1,000 ophthalmic lens designs.

[0149] On the other hand, the ophthalmic lens design (DN) is not included in the optimal set of ophthalmic elements because all standard values ​​are at their lowest.

[0150] Next, at least one final ophthalmic element for the wearer from the optimal set of ophthalmic elements is determined based on criteria selected based on the wearer's preference.

[0151] Preferably, the final ophthalmic element for the wearer is advantageously determined from an optimal set of ophthalmic elements based on the order of criteria selected by the wearer.

[0152] For example, the wearer assigns 10 points to different wearer criteria to determine the final ophthalmic element that meets the wearer's wishes among the previously calculated Pareto optimal ophthalmic elements, as shown in Table 4.

[0153]

[0154] Table 4: Selection of wearer criteria based on wearer preference

[0155] For each Pareto-optimal ophthalmic lens design, a score is calculated based on a linear combination of wearer weights.

[0156] - D1 5.49;

[0157] - D2 6.02;

[0158] - D3 6.23.

[0159] In this example, therefore, the final ophthalmic factor determined for the wearer is D3.

[0160] Referring to FIG. 5, the present invention also relates to a system (10) for implementing such a method of determining an ophthalmic element tailored to a wearer according to the present invention as described above, wherein the wearer has a prescription, and the system,

[0161] - Memory (12); and

[0162] - Includes a processor (14), and the processor,

[0163] A step of providing an initial set of ophthalmic elements, wherein each ophthalmic element of the initial set is tailored to the wearer's prescription;

[0164] For each ophthalmic element of an initial set, a step of calculating the value of each criterion of a plurality of criteria including a plurality of lens criteria and / or a plurality of wearer criteria;

[0165] A step of generating an optimal set of ophthalmic elements by calculating Pareto-optimal ophthalmic elements among the ophthalmic elements of an initial set based on the value of each criterion; and

[0166] To perform the step of determining the final ophthalmic element for the wearer from the optimal set of ophthalmic elements based on selected criteria based on the wearer's preference,

[0167] It is configured to execute program instructions stored in memory.

[0168] Such a system can be configured to be accessed remotely. For example, this method can be implemented from requests generated and transmitted from a website.

[0169] Another object of the present invention relates to a method for providing an ophthalmic lens to a wearer. Referring to FIG. 6, this method comprises:

[0170] - Wearer data provision step (S100),

[0171] - ophthalmic element determination step (S120), and

[0172] - Includes an ophthalmic lens manufacturing step (S130).

[0173] During the wearer data provision step (S100), wearer data including at least the wearer's prescription is provided.

[0174] Next, during the ophthalmic element determination step (S120), an ophthalmic element tailored to the wearer is determined according to the ophthalmic element determination method tailored to the wearer according to the present invention as described above.

[0175] Subsequently, an ophthalmic lens according to ophthalmic elements tailored to the determined wearer is manufactured during step (S130).

[0176] The present invention, as described above, can provide ophthalmic elements that take into account different requirements for the wearer, while ensuring that the determined ophthalmic element is the best compromise that complies with the wearer's requirements. This method provides a decision-making aid method in which a lens design or lens is determined by selecting from a set of possible compromises using selection criteria that are at least partially set by the user. The criteria may advantageously include optical criteria, surface criteria, and wearer criteria.

[0177] The present invention has been described above with the help of examples without limiting the general concept of the invention.

[0178] To a person skilled in the art, many additional modifications and variations will be apparent when referring to the exemplary embodiments described above, which are provided merely as examples and are not intended to limit the scope of the invention as determined solely by the claims.

[0179] In the claims, the word “comprising” does not exclude other elements or steps, and indefinite articles such as “one” or “one” do not exclude the plural. The mere fact that different features are cited in different dependent claims does not indicate that a combination of these features cannot be used advantageously. Any reference numerals in the claims should not be interpreted as limiting the scope of the invention.

Claims

Claim 1 A method implemented by computer means for determining ophthalmic elements tailored to a wearer with a prescription, comprising at least: a) providing an initial set of ophthalmic elements, wherein each ophthalmic element of the initial set is tailored to the wearer's prescription; b) for each ophthalmic element of the initial set, calculating the value of each criterion of a plurality of criteria including a plurality of lens criteria and / or a plurality of wearer criteria; c) generating an optimal set of ophthalmic elements by calculating Pareto-optimal ophthalmic elements among the ophthalmic elements of the initial set based on the value of each criterion, wherein the Pareto-optimal ophthalmic elements correspond to ophthalmic elements for which no criterion can be improved without compromising at least one other criterion; and d) determining a final ophthalmic element for the wearer from the optimal set of ophthalmic elements based on a selected criterion based on the wearer's preference. Claim 2 The method of claim 1 further comprises the step of selecting at least two criteria from the plurality of criteria based on the wearer's preference, and the optimal set of ophthalmic elements is generated by calculating Pareto-optimal ophthalmic elements from the initial set of ophthalmic elements based on the value of each selected criterion. Claim 3 A method according to claim 1, wherein the ophthalmic element is an ophthalmic lens or an optical design of an ophthalmic lens. Claim 4 A method according to claim 1, wherein the initial set of ophthalmic elements is provided from a predetermined database of ophthalmic elements. Claim 5 In paragraph 4, the method wherein each predetermined ophthalmic element is an ophthalmic element optimized for the wearer's prescription. Claim 6 A method according to paragraph 4, wherein each ophthalmic element of the initial set is calculated based on a plurality of predetermined ophthalmic elements. Claim 7 In claim 6, the method wherein each ophthalmic element of the initial set is a linear combination of the plurality of predetermined ophthalmic elements. Claim 8 In claim 7, an initial set of ophthalmic lens designs, for example, a database of progressive surfaces denoted by Di where i is 1 to M, of which M is predetermined ophthalmic lens designs, can be generated by calculating each ophthalmic lens design, and each new surface (S) is, , A method defined as such, wherein each of the above new surfaces (S) is a progressive surface if the ophthalmic lens designs are selected to have the same inset and the same progressive length. Claim 9 A method according to claim 1, wherein the plurality of lens standards include an optical standard and / or a surface standard, the optical standard is related to the optical parameters of the ophthalmic element, and the surface standard is related to the surface parameters of the surface of the ophthalmic element. Claim 10 A method according to claim 1, wherein the final ophthalmic element for the wearer is determined from an optimal set of ophthalmic elements based on the order of criteria selected by an eye care practitioner or the wearer. Claim 11 A method according to claim 1, wherein the wearer criteria include information indicating the wearer's activity while at least the ophthalmic element is intended to be worn by the wearer. Claim 12 A method according to claim 1, wherein the initial set of ophthalmic elements comprises at least 100 ophthalmic elements. Claim 13 A method according to claim 1, wherein the initial set of ophthalmic elements comprises at least 500 ophthalmic elements. Claim 14 A method according to claim 1, wherein the initial set of ophthalmic elements comprises 1,000 ophthalmic elements. Claim 15 A system for executing a method for determining ophthalmic elements tailored to a wearer with a prescription according to any one of claims 1 to 14, comprising: a memory; and a processor, wherein the processor comprises: a step of providing an initial set of ophthalmic elements, wherein each ophthalmic element of the initial set is tailored to the wearer's prescription; a step of calculating the value of each criterion of a plurality of criteria, including a plurality of lens criteria and / or a plurality of wearer criteria, for each ophthalmic element of the initial set; a step of generating an optimal set of ophthalmic elements by calculating Pareto-optimal ophthalmic elements among the ophthalmic elements of the initial set based on the value of each criterion, wherein the Pareto-optimal ophthalmic elements correspond to ophthalmic elements for which no criterion can be improved without compromising at least one other criterion; and a step of determining a final ophthalmic element for the wearer from the optimal set of ophthalmic elements based on a selected criterion based on the wearer's preference, the system being configured to execute program instructions stored in the memory. Claim 16 A method for providing an ophthalmic lens to a wearer, comprising the steps of: providing wearer data including at least a prescription of said wearer; determining an ophthalmic element tailored to said wearer according to any one of claims 1 to 14; and manufacturing an ophthalmic lens according to said determined ophthalmic element tailored to said wearer. Claim 17 A computer-readable storage medium storing a sequence of one or more stored instructions accessible to a processor, wherein the instructions, when executed by the processor, cause the processor to execute at least: a) providing an initial set of ophthalmic elements, wherein each ophthalmic element of the initial set is fitted to a wearer’s prescription; b) for each ophthalmic element of the initial set, a value for each of a plurality of criteria including a plurality of lens criteria and / or a plurality of wearer criteria; c) generating an optimal set of ophthalmic elements by computing Pareto-optimal ophthalmic elements among the ophthalmic elements of the initial set based on each criterion value, wherein the Pareto-optimal ophthalmic elements correspond to ophthalmic elements for which no criteria can be improved without compromising at least one other criterion; and d) determining a final ophthalmic element for the wearer from the optimal set of ophthalmic elements based on a selected criterion based on the wearer’s preference. Claim 18 delete Claim 19 delete Claim 20 delete Claim 21 delete

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