Spectacle lens and method for designing spectacle lens

Abstract

To provide a technique for reducing individual differences in a myopia progression suppression effect or a hyperopia reduction effect without requiring a wearer to have RPR.SOLUTION: A spectacle lens and its related technique are provided. The spectacle lens exhibits a myopia progression suppression effect or a hyperopia reduction effect, comprises a center side clear region, a functional region, and an outer clear region, and satisfies conditions 1 to 3 in any circle that can be arranged when a circle having a diameter of 4 mm is arranged in the functional region in plan view.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a spectacle lens and a method for designing a spectacle lens. [Background technology]

[0002] As a spectacle lens for suppressing the progression of refractive errors such as myopia, there is a lens having island-shaped regions formed thereon, each having a refractive power that is more positive than the prescribed refractive power (see, for example, Patent Document 1).

[0003] With a spectacle lens of this configuration, of the light beams that enter from the object-side surface and exit from the eyeball-side surface, the light beams that pass through areas other than the defocus area are focused on the wearer's retina, but the light beams that pass through the defocus area are focused at a position closer to the retina, thereby suppressing the progression of myopia.

[0004] Patent Document 2 describes the following:

[0005] FIG. 1 is a diagram showing how light rays entering the eye from the peripheral visual field are focused behind the peripheral retina when the eyeglass lenses for inhibiting the progression of myopia described in FIG. 1 of Patent Document 1 are worn.

[0006] As shown in Figure 1 of Patent Document 2, light rays entering the eye from the peripheral field of view corresponding to the eccentricity angle from the optical axis direction pass through the spectacle lens at an angle, which causes off-axis astigmatism (oblique astigmatism) and off-axis hyperopia.

[0007] As a result, a misalignment occurs between the optical focal plane (base power image position locus) and the peripheral retina, as shown in Fig. 1 of Patent Document 2. Due to this misalignment, the actual defocus power may be lower than the defocus power set in the spectacle lens for suppressing the progression of myopia.

[0008] In most cases, this deviation increases the further away from the fovea of ​​the retina. The refractive power that causes this deviation is also called relative peripheral refraction (RPR). A detailed definition is given in Patent Document 2, which can be referenced in this specification. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] U.S. Patent Application Publication No. 2017 / 0131567 [Patent Document 2] Japanese Patent Publication No. 2022-039960 Summary of the Invention [Problem to be solved by the invention]

[0010] RPR varies from wearer to wearer, or in other words, the shape of the retina varies from wearer to wearer.

[0011] Figure 19 is a diagram showing how light rays entering the eye from the peripheral visual field are focused behind the peripheral retina when wearing the spectacle lenses for inhibiting the progression of myopia described in Figure 1 of Patent Document 1.

[0012] As shown in the figure, in the area near the outer edge of the eyeglass lens (e.g., the outer part of the functional area described below, hereafter simply referred to as the "periphery"), there is a gap between the position of the image perceived by the convergence of light beams and the position of the retina. This gap differs depending on the wearer.

[0013] As a result, even if the spectacle lenses have the same defocus power as a convex region, the effect obtained from the defocus power will differ for each wearer depending on the state of the wearer's retina, that is, there will be individual differences in the effect of inhibiting the progression of myopia or reducing hyperopia.

[0014] In Patent Document 1, the defocus power in the convex area is uniform across the spectacle lens, which results in the above-mentioned individual differences.

[0015] In Patent Document 2, the defocus power is set in accordance with the RPR of the wearer, and the defocus power is just-fit for each wearer. The method in Patent Document 2 requires obtaining the RPR of each wearer, which is time-consuming.

[0016] An object of one aspect of the present invention is to provide a technology that reduces individual differences in the effect of inhibiting the progression of myopia or the effect of reducing hyperopia, without requiring the wearer's RPR. [Means for solving the problem]

[0017] As a result of intensive research, the present inventors have discovered that the above-mentioned problems can be solved by providing a spectacle lens that is freestyled according to the state of the wearer's retina.

[0018] To elaborate on this freestyle, there are always multiple non-convergence areas on the retina, which will be described later and which bring about defocus power, within any circle of the pupil diameter (diameter 3 to 6 mm, for example, diameter 4 mm).The present inventor has discovered a configuration in which the defocus powers in the multiple non-convergence areas on the retina are made different from one another.

[0019] With the above configuration, for example, within any circle, there is a non-convergence area on the retina that brings about two or more types of defocus power, namely, defocus power 1 and defocus power 2. While defocus power 1 is a perfect fit for (the state of) the retina of wearer 1, there may be cases where defocus power 1 is less effective in inhibiting the progression of myopia or reducing hyperopia for (the state of) the retina of wearer 2.

[0020] However, if defocus power 2 is an exact fit for wearer 2, then a single type of spectacle lens can be used to adequately exert the myopia progression inhibiting effect or hyperopia reducing effect for wearers 1 and 2. Even if the fit is not exact, either defocus power 1 or 2 is close to the value required for an exact fit. Therefore, even if the fit is not exact, it can be made to approach an exact fit. As a result, individual differences in the myopia progression inhibiting effect or hyperopia reducing effect can be reduced.

[0021] Specific embodiments of the present invention based on the above findings are as follows. A first aspect of the present invention is A spectacle lens that has an effect of inhibiting the progression of myopia or reducing hyperopia, a central clear area including the eye point, which causes a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the wearer's pupil, and converge on the retina, thereby realizing the wearer's prescribed refractive power; a functional area having an annular shape surrounding the central clear area, the functional area including: a base area for causing a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the wearer's pupil, and converge on the retina, thereby realizing the wearer's prescribed refractive power; and a retinal non-convergence area for causing a light beam incident from the object-side surface to exit from the eyeball-side surface, while not causing a light beam incident into the wearer's pupil to converge on the retina; Equipped with This is a spectacle lens that, when viewed in a plane, satisfies the following conditions for any circle that can be placed within the functional area, with the circle having a diameter of 4 mm. <Condition 1> Within the circle is a base region. <Condition 2> There are multiple areas of non-convergence on the retina within the circle. <Condition 3> The circle includes a plurality of retinal non-convergence areas having different defocus powers set therein.

[0022] A second aspect of the present invention is In the eyeglass lens according to the first aspect, the difference in defocus power between the plurality of retinal non-convergence areas under condition 3 is 0.50 D or more.

[0023] A third aspect of the present invention is The spectacle lens according to the first or second aspect, wherein the retinal non-convergence area has a spherical shape.

[0024] A fourth aspect of the present invention is In the spectacle lens according to any one of the first to third aspects, the retinal non-convergence area is arranged in at least one of the following ways in plan view. (Aspect 1) In plan view, the retinal non-convergence areas are spaced apart from each other. (Aspect 2) Within the functional area, the base area and the epiretinal non-convergence area are both annular zones. (Aspect 3) In planar view, the non-convergence areas on the retina are connected in a chain-like pattern.

[0025] A fifth aspect of the present invention is The spectacle lens according to any one of the first to fourth aspects, wherein in some of the plurality of on-retinal non-convergence regions, defocus power increases with increasing distance from the center of the lens.

[0026] A sixth aspect of the present invention is The eyeglass lens according to any one of the first to fifth aspects includes an outer clear area, which is an area around the functional area, and causes a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the wearer's pupil, and converge on the retina, thereby achieving the wearer's prescribed refractive power.

[0027] A seventh aspect of the present invention is The spectacle lens according to any one of the first to sixth aspects, wherein the retinal non-convergence area has a convex shape relative to the base area, and exhibits an effect of inhibiting the progression of myopia.

[0028] An eighth aspect of the present invention is A method for designing a spectacle lens that has an effect of inhibiting the progression of myopia or reducing hyperopia, comprising: a central clear area including the eye point, which causes a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the wearer's pupil, and converge on the retina, thereby realizing the wearer's prescribed refractive power; a functional area having an annular shape surrounding the central clear area, the functional area including: a base area for causing a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the wearer's pupil, and converge on the retina, thereby realizing the wearer's prescribed refractive power; and a retinal non-convergence area for causing a light beam incident from the object-side surface to exit from the eyeball-side surface, while not causing a light beam incident into the wearer's pupil to converge on the retina; Equipped with This is a method for designing eyeglass lenses, in which, when a circle with a diameter of 4 mm is placed within the functional region in a planar view, the eyeglass lenses are designed so that the following conditions are satisfied for all circles that can be placed within the functional region. <Condition 1> Within the circle is a base region. <Condition 2> There are multiple areas of non-convergence on the retina within the circle. <Condition 3> The circle includes a plurality of retinal non-convergence areas having different defocus powers set therein.

[0029] A ninth aspect of the present invention is a method for manufacturing a semiconductor device comprising: the retinal non-convergence area has two to four types of spherical shapes set to the mutually different defocus power values, In a method for designing eyeglass lenses according to an eighth aspect, in some of the types, the defocus power of the non-convergence area on the retina is increased from the defocus power set in the some of the types as the distance from the center of the lens increases.

[0030] A tenth aspect of the present invention is a method for manufacturing a semiconductor device comprising: The method for designing a spectacle lens according to the eighth or ninth aspect further comprises an outer clear area, which is an area around the functional area, causing a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the pupil of the wearer, and converge on the retina, thereby achieving the prescribed refractive power of the wearer.

[0031] An eleventh aspect of the present invention is a method for manufacturing a semiconductor device comprising: In the method for designing a spectacle lens according to any one of the eighth to tenth aspects, the retinal non-convergence region has a convex shape relative to the base region, and exerts an effect of inhibiting the progression of myopia.

[0032] Other aspects of the present invention that can be combined with the above aspects are as follows.

[0033] The central clear area (and the base area in the functional area, and further the outer clear area) of one aspect of the present invention functions as a so-called single-focus lens.

[0034] When a circle with a diameter of 4 mm is placed within the functional area in a planar view, the area of ​​the set of circles (excluding overlapping parts in the set) that satisfy conditions 1 to 3 when the placeable circles are grouped together (so-called planar area) may be 80% or more of the area of ​​the functional area, with 85% or more, 90% or more, 95% or more, 98% or more, 99% or more, and 100% being preferred in that order.

[0035] In a planar view, the area (area ratio) of the retinal non-convergence area provided in the functional area relative to the area of ​​the retinal non-convergence area in the entire eyeglass lens is preferably 85% or more, 90% or more, 95% or more, 98% or more, and 99% or more, in that order.

[0036] There are no limitations on the size and shape of the central clear area, and the shape may be circular, rectangular, elliptical, etc. As a guideline for the lower limit of the size of the central clear area, it may be a size that can contain a circle with a diameter of 6.00 mm centered on the eyepoint. As a guideline for the upper limit of the size of the central clear area, it may be a size that can fit within a circle with a diameter of 13.00 mm centered on the eyepoint.

[0037] The functional area preferably falls within a circle whose center is the eyepoint and whose diameter is any one value between 15.00 and 40.00 mm.

[0038] As a guideline, the functional zone may be defined as a zone in which 30% or more (or 40% or more, 50% or more, or 60% or more) of the light flux incident on the wearer's pupil does not converge onto the retina. The upper limit may be, for example, 70%. Also, the base zone may be set larger than any other non-convergence zone within the functional zone and / or when viewed in the circle.

[0039] In the functional area, the area of ​​the retinal non-convergence area, which is configured to have the effect of inhibiting the progression of myopia or reducing hyperopia, in a planar view may be specified to be 20% or more and 80% or less of the entire functional area. The retinal non-convergence areas may be arranged so that they become sparser towards the outer edge of the functional area. Furthermore, the functional area may include multiple retinal non-convergence areas, and two or more types of defocus power may be set in the multiple retinal non-convergence areas, with the area of ​​each type of defocus power being approximately the same (for example, each area area may be within ±10% of the average area area per type).

[0040] However, in consideration of making it easier to obtain good visibility even in peripheral vision, it is preferable that no configuration intended to suppress the progression of refractive error (e.g., defocus area, convex area and / or concave area, embedded structure, etc.) is provided between the outer edge of the spectacle lens and the functional area. In other words, it is preferable that the entire area between the outer edge of the spectacle lens and the functional area is an outer clear area.

[0041] It is not excluded that some (e.g., several) of the multiple retinal non-convergence regions in the functional region have a shape other than spherical. For example, the ratio of the area of ​​the retinal non-convergence regions other than spherical to the total area of ​​the retinal non-convergence regions may be 10% or less, 5% or less, or 3% or less. However, from the viewpoint of fully exerting defocusing power, it is preferable that all retinal non-convergence regions have a spherical shape.

[0042] The effects of the present invention are certainly achieved when all of the above conditions 1 to 3 are satisfied. On the other hand, the effects of the present invention may be achieved even if only a small portion of all the circles does not satisfy at least one of the above conditions 1 to 3.

[0043] For example, the "very small part" is as follows: When a circle with a diameter of 4 mm is placed within the functional area in a planar view, when the circles that can be placed are grouped together, the area (so-called planar area) of the group of circles (excluding overlapping parts in the group) that do not satisfy condition 1, condition 2, and / or condition 3 may be 20% or less of the area of ​​the functional area, with 15% or less, 10% or less, 5% or less, 1% or less, and 0% being preferred in that order.

[0044] In the eyeglass lenses described above, by replacing the convex portions with concave portions, the light beam will be focused on the opposite side, the back side (-Z direction) rather than the front side (+Z direction), thereby achieving the effect of reducing hyperopia.

[0045] The present invention also includes a case where no outer clear area is provided.

[0046] The matters described in relation to the eyeglass lens, which is one aspect of the present invention, can also be applied to a method for designing or manufacturing an eyeglass lens, and may be combined with other contents described in this specification.

[0047] The technical concept of the present invention is also reflected in a pair of eyeglass lenses in which one aspect of the present invention is applied to each of a right-eye lens and a left-eye lens.

[0048] The technical concept of the present invention is also reflected in eyeglasses in which the vicinity of the periphery of the eyeglass lens is cut based on a predetermined frame shape and the eyeglasses are fitted into the frame. [Effects of the Invention]

[0049] According to one aspect of the present invention, it is possible to provide a technology that reduces individual differences in the effect of inhibiting the progression of myopia or the effect of reducing hyperopia, without requiring the wearer's RPR. [Brief explanation of the drawings]

[0050] [Figure 1] FIG. 1 is a schematic plan view of a first specific example of a spectacle lens according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic plan view of a second specific example of a spectacle lens according to an embodiment of the present invention. [Figure 3] FIG. 3 is a schematic plan view of a <Specific Example 3> of a spectacle lens according to one embodiment of the present invention. [Figure 4] FIG. 4 is a schematic plan view of a <Specific Example 4> of a spectacle lens according to one embodiment of the present invention. [Figure 5] FIG. 5 is a schematic plan view of a <Specific Example 5> of a spectacle lens according to one embodiment of the present invention. [Figure 6] FIG. 6 is a schematic plan view of a spectacle lens according to a sixth embodiment of the present invention. [Figure 7] FIG. 7 is a schematic plan view of a <Specific Example 7> of a spectacle lens according to one embodiment of the present invention. [Figure 8] FIG. 8 is a schematic plan view of Example 8 of a spectacle lens according to one embodiment of the present invention. [Figure 9]FIG. 9 is a schematic plan view of a ninth specific example of a spectacle lens according to an embodiment of the present invention. [Figure 10] FIG. 10 is a schematic plan view of a <Specific Example 10> of a spectacle lens according to one aspect of the present invention. [Figure 11] FIG. 11 is a schematic plan view of Example 11 of a spectacle lens according to one embodiment of the present invention. [Figure 12] FIG. 12 is a schematic plan view of a twelfth specific example of a spectacle lens according to one aspect of the present invention. [Figure 13] FIG. 13 is a schematic plan view of a <Specific Example 13> of a spectacle lens according to one aspect of the present invention. [Figure 14] FIG. 14 is a schematic plan view of a <Specific Example 14> of a spectacle lens according to one embodiment of the present invention. [Figure 15] FIG. 15 is a schematic plan view of a <Specific Example 15> of a spectacle lens according to one embodiment of the present invention. [Figure 16] FIG. 16 is a schematic plan view of a spectacle lens according to an embodiment of the present invention. [Figure 17] FIG. 17 is a schematic plan view of a <Specific Example 17> of a spectacle lens according to one embodiment of the present invention. [Figure 18] FIG. 18 is a schematic plan view of Example 18 of a spectacle lens according to one aspect of the present invention. [Figure 19] Figure 19 is a diagram showing how light rays entering the eye from the peripheral visual field are focused behind the peripheral retina when wearing the spectacle lenses for inhibiting the progression of myopia described in Figure 1 of Patent Document 1. DETAILED DESCRIPTION OF THE INVENTION

[0051] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following description of preferred embodiments of the present invention will be given by way of example only, and the present invention is not limited to the illustrated embodiments.

[0052] The spectacle lenses mentioned in this specification have an object-side surface and an eyeball-side surface. The "object-side surface" refers to the surface that is located on the object side when a wearer wears spectacles equipped with the spectacle lens, and the "eyeball-side surface" refers to the opposite, i.e., the surface that is located on the eyeball side when a wearer wears spectacles equipped with the spectacle lens. This relationship also applies to the lens substrate that forms the basis of the spectacle lens. In other words, the lens substrate also has an object-side surface and an eyeball-side surface. In one embodiment of the present invention, the object-side surface is a convex surface, and the eyeball-side surface is a concave surface. In other words, the spectacle lens in one embodiment of the present invention is a meniscus lens.

[0053] The spectacle lens according to one embodiment of the present invention is a myopia progression inhibiting lens, similar to the spectacle lens described in Patent Document 1. However, the spectacle lens according to one embodiment of the present invention is not limited to this. For example, the spectacle lens according to one embodiment of the present invention may be a hyperopia reducing lens. Note that myopia progression inhibition and hyperopia reduction inhibition are collectively referred to as refractive error progression inhibition.

[0054] As an embodiment of the present invention, a case where a convex portion is provided on the base region, which has the effect of inhibiting the progression of myopia, will be exemplified, similarly to Patent Document 1. The following mainly exemplifies spectacle lenses in which the retinal non-convergence region described below has a convex shape with respect to the base region and which have the effect of inhibiting the progression of myopia.

[0055] In this specification, the horizontal direction when the eyeglass lens is worn is defined as the X direction, the vertical (up and down) direction as the Y direction, and the thickness direction of the eyeglass lens, which is perpendicular to the X and Y directions, as the Z direction. The Z direction is also the optical axis direction of the eyeglass lens. The origin is the lens center. The lens center refers to the optical center or geometric center of the eyeglass lens. In this specification, an example is given in which the optical center and the geometric center approximately coincide. As viewed from the wearer's perspective, the right is the +X direction, the left is the -X direction, the up is the +Y direction, the down is the -Y direction, the object side is the +Z direction, and the opposite direction (backward) is the -Z direction. These near and far directions relate to the light beam passing through the center of the pupil, and although X and Y coordinates must also be taken into account in the strict sense when viewing peripheral vision, they are defined as above in this specification for the sake of convenience. In this specification, "planar view" refers to the state when viewed from the +Z direction to the -Z direction. The direction extending radially from the center of the lens is the +r direction, and the circumferential direction perpendicular to the r direction is the θ direction. In addition, if the functional area is provided only on the outermost surface on the eyeball side, the state when viewed from the -Z direction to the +Z direction may be considered as the planar view. Hereinafter, when discussing "positions" such as the eye point and geometric center of a spectacle lens, they refer to positions in a planar view unless otherwise specified.

[0056] In this specification, "to" indicates a value greater than or equal to a predetermined value and less than or equal to a predetermined value.

[0057] <Eyeglass lenses> A spectacle lens according to one aspect of the present invention comprises a central clear area and a functional area.

[0058] The central clear area has a smooth surface shape that can achieve the wearer's prescribed refractive power from a geometrical optics perspective, and is transparent in the visible light wavelength range, for example. The central clear area corresponds to the first refractive area in Patent Document 1.

[0059] The central clear area is an area that includes the center of the lens and / or the eye point, and is an area that causes the light beam that enters from the object-side surface to exit from the eyeball-side surface, enter the wearer's pupil, and converge on the retina.

[0060] The central clear region of one embodiment of the present invention can achieve prescribed power (spherical power, cylindrical power, cylindrical axis, etc.) This spherical power may be a power to be corrected when looking straight ahead (distance to an object is approximately from infinity to 1 m) (for example, distance power, hereinafter referred to as distance power) or a power to be corrected when looking at intermediate distances (1 m to 40 cm) or near distances (40 cm to 10 cm).

[0061] Furthermore, the central clear area does not include any configuration intended to have an effect of suppressing the progression of refractive error (for example, a defocus area, a convex area and / or a concave area, an embedded structure, etc.).

[0062] The central clear area (and the base area in the functional area, and further the outer clear area) of one aspect of the present invention functions as a so-called single-focus lens.

[0063] Incidentally, the prescription data of the wearer's information is written on the lens bag of the eyeglass lens. In other words, if there is a lens bag, it is possible to identify the eyeglass lens based on the prescription data of the wearer's information. Furthermore, eyeglass lenses are usually set with a lens bag. Therefore, the technical idea of ​​the present invention is also reflected in eyeglass lenses that come with a lens bag, and the same applies to sets of lens bags and eyeglass lenses.

[0064] The "eye point" is, for example, the position through which the line of sight passes when the wearer is wearing a spectacle lens and looking straight ahead, and this example will be given below. The eye point may also be the position through which the wearer's line of sight passes when viewing an object close to the wearer (in other words, when viewing close up), i.e., the near eye point. In one aspect of the present invention, an example is given in which the geometric center of the spectacle lens before framing into the frame coincides with the eye point, coincides with the prism reference point, and coincides with the lens center. Hereinafter, a spectacle lens before framing into the frame will be given as an example of a spectacle lens of one aspect of the present invention, but the present invention is not limited to this aspect.

[0065] The position of the eye point can be specified by referring to a remark chart or a centration chart issued by the lens manufacturer.

[0066] The functional area is an area in which a light beam incident from the object-side surface is emitted from the eyeball-side surface, while at least a portion of a light beam incident into the pupil of the wearer is not converged onto the retina. The functional area is an annular area adjacent to and surrounding the central clear area in a planar view.

[0067] The annular outer clear area surrounding the functional area on the outer edge of the spectacle lens directs light beams incident from the object-side surface to exit from the eyeball-side surface, enter the wearer's pupil, and converge on the retina. In other words, the functional area is an annular area located between the outer clear area and the central clear area.

[0068] The functional area sandwiched between the outer clear area and the central clear area is composed of an epiretinal non-convergence area and a base area.

[0069] The base region has the same function as the central clear region (and the outer clear region described below). In one aspect of the present invention, the functional region other than the base region is a non-convergence region on the retina.

[0070] The non-convergence area on the retina is an area that does not converge the light beam incident on the pupil of the wearer onto the retina, and has a refractive power different from the prescribed refractive power exerted by the base area.

[0071] In one aspect of the present invention, both the base region and the non-convergence region on the retina within the functional region are spherical. This configuration allows the defocusing power to be fully exerted. This configuration will be exemplified below.

[0072] In this specification, the "defocus power" refers to the difference between the refractive power of each non-convergence area on the retina (in other words, the defocus area) and the refractive power of the area other than each defocus area. In other words, the "defocus power" is the difference obtained by subtracting the refractive power of the base area from the average value of the minimum and maximum refractive powers at a predetermined location of the non-convergence area on the retina.

[0073] In this specification, the term "refractive power" refers to the average refractive power, which is the average value between the refractive power in the direction in which the refractive power is minimum and the refractive power in the direction in which the refractive power is maximum (the direction perpendicular to that direction).

[0074] In a spectacle lens according to one aspect of the present invention, the shape of the non-convergence area on the retina is spherical. Therefore, the correspondence relationship between the defocusing power and the curvature of the spherical surface is clear. In this specification, the defocusing power is sometimes referred to as the curvature, and conversely, the curvature is sometimes referred to as the defocusing power.

[0075] In the spectacle lens according to one aspect of the present invention, when a circle with a diameter of 4 mm is placed within the functional region in plan view, any circle that can be placed satisfies the following condition. <Condition 1> Within the circle is a base region. <Condition 2> There are multiple areas of non-convergence on the retina within the circle. <Condition 3> The circle includes the plurality of retinal non-convergence areas having different defocus powers. However, condition 3 also includes the case where, for example, there is one retinal non-convergence area with defocus power 1 and two retinal non-convergence areas with defocus power 2 within the circle. In other words, the retinal non-convergence areas within the circle do not necessarily have to be completely different from each other. The 4 mm diameter circle is assumed to be the pupil diameter. The dashed circle in Figures 1 to 18 shown below corresponds to this circle. Instead of the 4 mm diameter circle, a circle with a single value in the range of 3 to 6 mm may be used, taking into account the expansion and contraction of the pupil diameter and individual differences.

[0076] By satisfying the above conditions 1 and 2, the retinal non-convergence area can suppress the progression of myopia, while the base area can realize the wearer's prescribed refractive power from the viewpoint of geometrical optics. Note that it is sufficient if the retinal non-convergence area exists partially within the circle. The defocus power provided by this partially existing area (only a part of the retinal non-convergence area) may be set to a value equal to the defocus power in one retinal non-convergence area, for example, when there are multiple retinal non-convergence areas that are approximately circular in plan view, as in the below-mentioned embodiment 1.

[0077] By satisfying the above conditions, defocus power 1 is a perfect fit for wearer 1 (the state of the retina), while even if defocus power 1 reduces the effect of inhibiting the progression of myopia or reducing hyperopia for wearer 2 (the state of the retina), defocus power 2 can be a perfect fit for wearer 2.

[0078] Even if it is not a perfect fit, either defocus power 1 or 2 is close to the value required for a perfect fit. Therefore, even if it is not a perfect fit, it can be made close to a perfect fit.

[0079] As a result, a single type of spectacle lens can be used to sufficiently suppress the progression of myopia or reduce hyperopia for wearers 1 and 2, and a technology can be provided that reduces individual differences in the effect of suppressing the progression of myopia or reducing hyperopia without requiring the wearer's RPR.

[0080] <Preferred Examples and Modified Examples of Eyeglass Lenses> Preferred examples and modifications of the spectacle lens according to one aspect of the present invention will be described below.

[0081] When a circle with a diameter of 4 mm is placed within the functional area in a planar view, the area of ​​the set of circles (excluding overlapping parts in the set) that satisfy conditions 1 to 3 when the placeable circles are grouped together (so-called planar area) may be 80% or more of the area of ​​the functional area, with 85% or more, 90% or more, 95% or more, 98% or more, 99% or more, and 100% being preferred in that order.

[0082] It is not excluded that some (e.g., several) of the multiple retinal non-convergence regions in the functional region have a shape other than spherical. For example, the ratio of the area of ​​the retinal non-convergence regions other than spherical to the total area of ​​the retinal non-convergence regions may be 10% or less, 5% or less, or 3% or less. However, from the viewpoint of fully exerting defocusing power, it is preferable that all retinal non-convergence regions have a spherical shape.

[0083] Various arrangements of the retinal non-convergence areas within the functional area can be adopted.

[0084] (Aspect 1) For example, as described in Patent Document 1, retinal non-convergence regions having a substantially circular shape in plan view may be arranged in an island pattern (i.e., spaced apart and not adjacent to each other) around the center of the spectacle lens at equal intervals in the circumferential and radial directions. One example of the arrangement of retinal non-convergence regions in plan view is an arrangement in which the centers of the convex regions are independently and discretely arranged so that they form the vertices of an equilateral triangle (the center of each retinal non-convergence region is arranged at the vertex of a honeycomb structure). In this case, the spacing between the retinal non-convergence regions may be 1.0 to 2.0 mm. The number of retinal non-convergence regions may be 100 to 100,000. The shape of the retinal non-convergence regions in plan view is not limited to being circular, and may be elliptical, polygonal, etc.

[0085] More specific aspects of Aspect 1 will be shown in the specific examples below. In the specific examples below, the retinal non-convergence regions are arranged in a honeycomb configuration, a circumferential configuration, or a spiral configuration in plan view (each of these configurations will be described later). Any combination of these configurations is also one aspect of Aspect 1 of the present invention. Furthermore, an aspect of the present invention also includes an aspect in which several retinal non-convergence regions of Aspect 1 are strung together, as in Aspect 3 below.

[0086] (Aspect 2) In another embodiment, both the base region and the retinal non-convergence region within the functional region may be annular. There are no limitations on the shape of the annular zone in plan view, and the inner side (the outline closer to the lens center) and / or the outer side (the outline farther from the lens center) of the annular zone may be a perfect circle, ellipse, rectangle, etc. It is preferable that the annular zone has a spherical shape in a radial cross section.

[0087] In the second aspect, the annular zones that are the retinal non-convergence regions and the annular zones that are the base regions are alternately arranged in the radial direction. The region between the annular zone of the retinal non-convergence region with the smallest diameter and the annular zone of the retinal non-convergence region with the largest diameter (including both annular zones) may be set as the functional region. This may be used as a method for defining the functional region in the second aspect.

[0088] (Aspect 3) In another embodiment, a plurality of retinal non-convergence regions having a substantially circular shape in plan view may be connected in a daisy-chain fashion in the circumferential direction to form an annular zone. The retinal non-convergence regions may be connected in a daisy-chain fashion in the radial direction so that each annular zone is connected in the radial direction. It is preferable that each retinal non-convergence region has a spherical cross-sectional shape.

[0089] In the third embodiment, the annular zones formed by connecting the retinal non-convergence regions and the annular zones that are the base regions are alternately arranged in the radial direction. However, there may be a portion where the annular zones are connected in the radial direction. The region between the annular zone of the retinal non-convergence region with the smallest diameter and the annular zone of the retinal non-convergence region with the largest diameter (including both annular zones) may be set as the functional region. This may be used as a method for defining the functional region in the third embodiment.

[0090] Although this is common to aspects 1 to 3, the condition 2, "there are multiple retinal non-convergence areas within the circle," naturally includes, for example, a case where two retinal non-convergence areas that are substantially circular in plan view are entirely contained within the circle, but also includes a case where there are two retinal non-convergence areas that are partially contained within the circle. The same applies to aspect 3, which is a daisy-chain. Furthermore, in aspect 2, which is a non-daisy-chain of rings, it is sufficient to have two or more rings that are partially contained within the circle.

[0091] In the above-mentioned aspects 1 to 3, the on-retinal non-convergence area may have two to four types of spherical shapes set to the mutually different defocus power values. In this case, the difference between the mutually different defocus power values ​​in the above-mentioned condition 3 may be 0.50D (preferably 0.75D, 1.00D) or more. This makes it possible to provide a wide variety of values, and a single type of spectacle lens can be used to sufficiently exert the effect of inhibiting the progression of myopia or the effect of reducing hyperopia for wearers 1 and 2.

[0092] In the above-mentioned aspect 1, the retinal non-convergence area may have two to four types of spherical shapes set to the mutually different defocus power values, and in some (more specifically, only some) of the types, the defocus power of the retinal non-convergence area may be increased with increasing distance from the lens center.

[0093] When the RPR around the retina is positive, the focal point of the lens' base power is behind the retina, the focal point of the non-convergence area on the retina is relatively close to the retina, and the spot formed on the retina by diverging light from the focal point of the non-convergence area on the retina becomes smaller. To compensate for this, the defocus power of the non-convergence area on the retina can be increased as described in the above paragraph.

[0094] On the other hand, instead of adopting the configuration described in the above paragraph for all types of defocus power values, it is preferable to increase the defocus power of the retinal non-convergence area for only some types (for example, one specific type) of retinal non-convergence area as it moves away from the lens center. This makes it possible to solve the problem related to RPR without significantly changing the wearing comfort between the area closer to the lens center and the area closer to the lens periphery even within the functional area. In other words, it is possible to eliminate the deterioration of defocus power caused by RPR.

[0095] "Increasing the defocus power of the retinal non-convergence area as it moves away from the center of the lens" means that, in the one specific type and multiple retinal non-convergence areas, the spherical power (curvature) of the retinal non-convergence area on the outer edge side of the lens (near the outer clear area) is greater than the spherical power (curvature) of the retinal non-convergence area on the center side of the lens (near the central clear area).

[0096] In addition, it is preferable that the spherical power (curvature) of the retinal non-convergence areas in the one specific type and multiple retinal non-convergence areas is equal or increases in the radial direction (+r direction). "Equal spherical power (curvature)" naturally includes cases where the values ​​are completely the same, and also includes cases where the values ​​are different but within the tolerance range (±0.12D).

[0097] The reason why it is stated that the different defocus power values ​​are "set to" is as follows. In the retinal non-convergence areas of only some types, the curvature increases individually in the radial direction (+r direction), that is, not all retinal non-convergence areas belonging to that type have the same curvature. On the other hand, a reference curvature (refractive power) is set in advance. This reference curvature (refractive power) is increased in the radial direction (+r direction) in each retinal non-convergence area. Even in this preferred example, it is sufficient to satisfy the above conditions 1 to 3, and in the above condition 3, the difference between the different defocus power values ​​needs to be 0.50D (preferably 0.75D, 1.00D) or more. A specific example of the content of this paragraph will be described later as a design method invention.

[0098] The shape of the outer edge of the functional area (that is, the shape of the functional area side in the outer clear area and the boundary between them) is preferably defined as follows.

[0099] The functional area preferably falls within a circle whose center is the eyepoint and whose diameter is any one value between 15.00 and 40.00 mm. When this configuration is adopted, the distance from the eye point to the functional area in the peripheral field of view is not greater than in the past, and the outer clear area is positioned on the outer edge of the functional area, making it easier to obtain good visibility in the peripheral field of view. If the lower limit of this configuration is reached or exceeded, it is possible to ensure a sufficient area for the non-convergence region on the retina. If the upper limit of this configuration is set to or below the upper limit, the following effect can be obtained. That is, the farther the point through which the line of sight passes is from the lens center, the greater the difference in prism power between the base region and the retinal non-convergence region, and the greater the effect of double images on the wearer. Therefore, if the upper limit is set to or below the upper limit, the retinal non-convergence region is positioned not too far from the lens center, so the difference in prism power does not become excessive.

[0100] The following examples are given as examples of methods for defining functional regions in the above-mentioned aspect 1.

[0101] The definition of the outer shape of the functional area (i.e. the shape of the outer clear area) may be:

[0102] In a planar view, the boundary line between the functional area and the outer clear area may be defined as the envelope of the collection of all circles (all with the same radius) with a radius r1 [mm] (r1 is any value in the range of 1.50 to 2.50) that can circumscribe a retinal non-convergence area within the functional area on the outer clear area side without including other retinal non-convergence areas (definition of the outer edge of the functional area). Because the value of r1 × 2 (and r2 × 2, described below) assumes the pupil diameter, each of these circles is also referred to as a clear pupil circle in this specification. Hereinafter, an envelope will be illustrated, but the shape of the outer clear area may be defined as a "collection of clear pupil circles" rather than an envelope of a collection of clear pupil circles. In other words, the outer clear area may include the eyepoint and be composed of a collection of clear pupil circles. Furthermore, in a spectacle lens, an area other than the central clear area and the outer clear area may be defined as the functional area.

[0103] The definition of the central shape of the functional region (i.e., the shape of the central clear region) may be as follows.

[0104] In a planar view, when the boundary between the functional area and the central clear area is defined as the envelope of the collection of all circles (all with the same radius) of radius r2 [mm] (r2 is any value between 1.50 and 2.50) that can circumscribe the retinal non-convergence area within the functional area on the side of the central clear area without including other retinal non-convergence areas, the central clear area is preferably sized to encompass a circle centered at the eyepoint and having a diameter of any one of 6.00 to 13.00 mm, and to fit within another circle having a diameter within that range (6.00 to 13.00 mm) (definition of the central side of the functional area). The shape of the central clear area may be defined as the "collection of clear pupil circles" rather than the envelope of the collection of clear pupil circles. In other words, the central clear area may include the eyepoint and be composed of a collection of clear pupil circles. As an example of dimensions, the diameters of the inscribed and circumscribed circles of the central clear area fall within the range of 6.00 to 13.00 mm. It is preferable that the central clear area be of this size.

[0105] There are no limitations on the size and shape of the central clear area, and the shape may be circular, rectangular, elliptical, etc. As a guideline for the lower limit of the size of the central clear area, it may be a size that can contain a circle with a diameter of 6.00 mm centered on the eyepoint. As a guideline for the upper limit of the size of the central clear area, it may be a size that can fit within a circle with a diameter of 13.00 mm centered on the eyepoint.

[0106] By adopting the configuration described in the above paragraph, sufficiently good visibility can be obtained when viewed from the front.

[0107] The definitions of the central clear area and the outer clear area are not limited to the above. For example, in each of the specific examples given below, the central clear area is defined as a circle that does not include the non-convergence area on the retina and has the largest diameter from the center of the lens. Furthermore, in each of the specific examples given below, the boundary between the functional area and the outer clear area is defined as a circle that includes the non-convergence area on the retina and has the largest diameter from the center of the lens. Even if the definitions described in this paragraph are adopted, the specific examples given below are set to satisfy the above conditions 1 to 3.

[0108] As shown in Patent Document 1, the annular functional area is composed of a plurality of convex areas (that is, non-convergence areas on the retina) on a base area having the same shape as the central clear area or the outer clear area.

[0109] As a guideline, the functional region may be defined as one in which 30% or more (or 40% or more, 50% or more, or 60% or more) of the light flux incident on the wearer's pupil does not converge onto the retina. The larger this percentage value, the greater the effect of inhibiting the progression of myopia or reducing hyperopia is expected to be, but visibility will decrease. The percentage value may be determined appropriately based on the balance between the effect of inhibiting the progression of myopia or reducing hyperopia and visibility. The upper limit may be, for example, 70%. Furthermore, the base region may be set larger than any other non-convergence region within the functional region and / or when viewed from the circle.

[0110] In the functional area, the area of ​​the retinal non-convergence area, which is configured to have the effect of inhibiting the progression of myopia or reducing hyperopia, in a planar view may be specified to be 20% or more and 80% or less of the entire functional area. The retinal non-convergence areas may be arranged so that they become sparser towards the outer edge of the functional area. Furthermore, the functional area may include multiple retinal non-convergence areas, and two or more types of defocus power may be set in the multiple retinal non-convergence areas, with the area of ​​each type of defocus power being approximately the same (for example, each area area may be within ±10% of the average area area per type).

[0111] The shape of the functional area is not limited and may be annular in plan view, and the ring may be circular, rectangular, elliptical, or a combination thereof on the inside (i.e., the boundary between the central clear area and the functional area) and / or the outside (i.e., the boundary between the outer clear area and the functional area).

[0112] The spectacle lens of one embodiment of the present invention may be a spectacle lens after being fitted into a frame, and a part of the functional area of ​​the spectacle lens may be in contact with the outer edge of the spectacle lens, and another part of the functional area may be in contact with the outer clear area. The expression "outer clear area around the functional area" includes this case. Furthermore, it does not preclude the provision of a non-convergence area on the retinal side further to the outer edge of the outer clear area.

[0113] However, in consideration of making it easier to obtain good visibility even in peripheral vision, it is preferable that no configuration intended to have an effect of suppressing the progression of refractive error (e.g., defocus area, convex area and / or concave area, embedded structure, etc.) is provided between the outer edge of the spectacle lens and the functional area. In other words, it is preferable that the entire area between the outer edge of the spectacle lens and the functional area is an outer clear area.

[0114] It is preferable that no non-convergence area on the retina is provided in the outer clear area on the outer edge side of the functional area (preferably between the outer edge of the functional area and the outer edge of the spectacle lens).

[0115] The effects of the present invention are certainly achieved when all of the above conditions 1 to 3 are satisfied. On the other hand, the effects of the present invention may be achieved even if only a small portion of all the circles does not satisfy at least one of the above conditions 1 to 3.

[0116] For example, the "very small part" is as follows: When a circle with a diameter of 4 mm is placed within the functional area in a planar view, when the circles that can be placed are grouped together, the area (so-called planar area) of the group of circles (excluding overlapping parts in the group) that do not satisfy condition 1, condition 2, and / or condition 3 may be 20% or less of the area of ​​the functional area, with 15% or less, 10% or less, 5% or less, 1% or less, and 0% being preferred in that order.

[0117] In the eyeglass lenses described above, by replacing the convex portions with concave portions, the light beam will be focused on the opposite side, the back side (-Z direction) rather than the front side (+Z direction), thereby achieving the effect of reducing hyperopia.

[0118] The matters described as an eyeglass lens, which is one aspect of the present invention, can also be applied to a design method or a manufacturing method of an eyeglass lens. An example is as follows. The following configuration may be combined with other contents described in this specification. "A method for designing or manufacturing a spectacle lens that has the effect of inhibiting the progression of myopia or reducing hyperopia, a central clear area including the eye point, which causes a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the wearer's pupil, and converge on the retina, thereby realizing the wearer's prescribed refractive power; a functional area having an annular shape surrounding the central clear area, the functional area including: a base area for causing a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the wearer's pupil, and converge on the retina, thereby realizing the wearer's prescribed refractive power; and a retinal non-convergence area for causing a light beam incident from the object-side surface to exit from the eyeball-side surface, while not causing a light beam incident into the wearer's pupil to converge on the retina; an outer clear area that is located around the functional area and that causes a light beam that has entered through the object-side surface to exit through the eyeball-side surface, enter the wearer's pupil, and converge on the retina, thereby achieving the wearer's prescribed refractive power; A method for designing or manufacturing a spectacle lens, comprising: A method for designing or manufacturing a spectacle lens, in which, when a circle with a diameter of 4 mm is placed within the functional region in a plan view, any circle that can be placed satisfies the above conditions 1 to 3.

[0119] The retinal non-convergence area has two to four types of spherical shapes set to the different defocus power values, and In some of the types, the defocus power of the non-convergence area on the retina may be increased from the defocus power set in the some of the types as the distance from the lens center increases.

[0120] In the specific example 1 described below, if a retinal non-convergence area (number 1) that exhibits defocus power 1 (3.50 D) is located closer to the lens center, it will exhibit 3.50 D as originally set. On the other hand, if it is located further from the lens center (near the outer clear area), the defocus power increases (and thus the refractive power (curvature) increases) to defocus power 2 (4.50 D), which is one specific example of the configuration described in the above paragraph. In this specific example, the retinal non-convergence area (number 2) that produces defocus power 2 exhibits the same defocus power (4.50 D) whether it is located closer to the lens center or further away.

[0121] The present invention also includes a case where no outer clear area is provided.

[0122] <Example of eyeglass lenses> The arrangement of the defocus region, which is a non-convergence region on the retina, is not particularly limited and can be determined from the viewpoint of, for example, visibility from outside the defocus region, adding design features to the defocus region, adjusting refractive power using the defocus region, etc. Note that the defocus region is an example of a non-convergence region on the retina, and does not converge the light flux on the retina but converges the light flux in front of the retina (toward the +Z direction).

[0123] In a functional region arranged around the central clear region of the eyeglass lens, substantially circular defocus regions may be arranged in an island pattern (i.e., spaced apart and not adjacent to each other) at equal intervals in the circumferential and radial directions. An example of the arrangement of the defocus regions in a planar view is an independent, discrete arrangement in which the centers of the convex regions are at the vertices of equilateral triangles (hexagonal arrangement in which the centers of the defocus regions are located at the vertices of a honeycomb structure). In this case, the distance between the defocus regions may be 1.0 to 2.0 mm. The number of defocus regions (and thus on-retinal non-convergence regions) may be 10 to 200.

[0124] In the functional area, an example of a configuration (on-retinal non-convergence area) that has the effect of suppressing the progression of myopia or reducing hyperopia is the defocus area.

[0125] A defocus region is a region in which, from a geometrical optics perspective, at least a portion of the region does not focus light at the light-focusing position of the base region. A defocus region is a portion corresponding to the micro-convex portion in Patent Document 1. A spectacle lens according to an embodiment of the present invention is a myopia progression inhibiting lens, similar to the spectacle lens described in Patent Document 1. Similar to the micro-convex portion in Patent Document 1, the multiple defocus regions according to an embodiment of the present invention may be formed on at least one of the object-side surface and the eyeball-side surface of the spectacle lens. This specification mainly illustrates a case in which multiple defocus regions are provided only on the object-side surface of the spectacle lens. Hereinafter, unless otherwise specified, an example will be given in which the defocus region has a curved shape that protrudes toward the outside of the lens.

[0126] It is preferable that more than half of the multiple defocus areas (all defocus areas in a functional area) are arranged at the same period in a planar view. An example of a pattern with the same period is an equilateral triangle arrangement in a planar view (the centers of the defocus areas are arranged at the vertices of an equilateral triangle net). Preferably, it is 80% or more, more preferably 90% or more, and even more preferably 95% or more. Hereinafter, as with the above, preferred examples of "more than half of all defocus areas in a functional area (or 80% or more)" are 80% or more, 90% or more, and 95% or more, in order of preference, and repeated description will be omitted.

[0127] Each defocus area is configured, for example, as follows: The diameter of the defocus area in plan view is preferably about 0.6 to 2.0 mm. The surface area of ​​each defocus area is 0.50 to 3.14 mm. 2 The convex defocus area has a radius of curvature of 50 to 250 mm, preferably a spherical shape of about 86 mm.

[0128] Although there are no specific limitations on the numerical values ​​of the defocus power in each defocus area, for example, it is preferable that the minimum value of the defocus power provided by the defocus area on the spectacle lens is within the range of 0.50 to 4.50 D and the maximum value is within the range of 3.00 to 10.00 D. The difference between the maximum and minimum values ​​is preferably within the range of 1.00 to 5.00 D.

[0129] The lens substrate is formed of a thermosetting resin material such as thiourethane, allyl, acrylic, or epithio. However, other resin materials that provide the desired refractive index may be selected as the resin material for the lens substrate. Alternatively, the lens substrate may be made of inorganic glass instead of a resin material.

[0130] The hard coat film is formed using, for example, a thermoplastic resin or a UV-curable resin. The hard coat film can be formed by immersing the lens substrate in a hard coat solution, by spin coating, or the like. Coating with such a hard coat film can improve the durability of the eyeglass lens.

[0131] The anti-reflection coating is formed by vacuum deposition of an anti-reflection agent such as ZrO2, MgF2, Al2O3, etc. Coating with such an anti-reflection coating can improve the visibility of images through the eyeglass lenses.

[0132] A plurality of defocus regions are formed on the object-side surface of the lens substrate. Therefore, when this surface is covered with a hard coat film and an anti-reflection film, a plurality of defocus regions are also formed by the hard coat film and the anti-reflection film, following the defocus regions in the lens substrate.

[0133] In manufacturing spectacle lenses, first, a lens substrate is molded by a known molding method such as cast polymerization. For example, a mold having a molding surface with a plurality of recesses is used to perform molding by cast polymerization, thereby obtaining a lens substrate having a defocus region on at least one surface. Once the lens substrate is obtained, a hard coat film is then formed on the surface of the lens substrate. The hard coat film can be formed by immersing the lens substrate in a hard coat solution, by spin coating, or the like. After the hard coat film is formed, an anti-reflection film is further formed on the surface of the hard coat film by vacuum deposition of the raw materials for the film. By using such a manufacturing procedure, a spectacle lens having a plurality of defocus areas protruding toward the object side on the object side surface is obtained.

[0134] The thickness of the coating formed through the above steps may be, for example, in the range of 0.1 to 100 μm (preferably 0.5 to 5.0 μm, and more preferably 1.0 to 3.0 μm). However, the thickness of the coating is determined depending on the function required of the coating, and is not limited to the range exemplified above.

[0135] One or more additional coating layers can be formed on the coating layer. Examples of such coating layers include various coating layers such as anti-reflection coatings, water-repellent or hydrophilic anti-fouling coatings, and anti-fogging coatings. Known techniques can be applied to form these coating layers.

[0136] <Glasses> The technical concept of the present invention is also reflected in eyeglasses in which the peripheral portions of the spectacle lenses are cut based on a predetermined frame shape and then fitted into the frame. There are no limitations on the type or shape of the frame, and it may be full-rim, half-rim, under-rim, or rimless.

[0137] Specific examples of spectacle lenses according to one aspect of the present invention are shown below, but the present invention is not limited to the following specific examples.

[0138] <Example 1> FIG. 1 is a schematic plan view of a <Specific Example 1> of a spectacle lens 1 according to one embodiment of the present invention.

[0139] The following lens substrate was fabricated while employing the above-described mode 1 (discretely arranged convex portions). Note that no other materials were laminated onto the lens substrate. The prescribed power S (spherical power) was 0.00D, and the C (cylindrical power) was 0.00D. The lens substrate is an uncut lens 1, which has a perfect circular shape in a plan view, and the lens center is the center of the perfect circle. This center is also referred to as the eye point in the examples. The central clear region 2, outer clear region 4, and base region 3b realize the prescribed refractive power. Planar diameter of lens substrate: 60mm Lens material type: PC (polycarbonate) Lens substrate refractive index: 1.589 Lens base curve: 3.00D The above content is common to each specific example, so further description will be omitted. Shape of the central clear area 2: Planar circular shape (diameter 9.4 mm) centered on the center of the lens (geometric center and eye point) Shape of functional area 3: Area centered on the center of the lens (geometric center and eye point) (diameter 33.5 mm, but annular area excluding clear area 2 on the central side) Surface forming the non-convergence area on the retina: Surface on the object side Shape of the retinal non-convergence area: convex, spherical, and circular in plan view (diameter 1.0 mm) Number of defocus powers in the retinal non-convergence area: 2 (Defocus power 1, represented by the white circle in the figure, is 3.50D; defocus power 2, represented by the hatched circle in the figure, is 4.50D) Arrangement of retinal non-convergence areas in planar view: Each retinal non-convergence area is individually and discretely arranged so that the center of each retinal non-convergence area is the vertex of an equilateral triangle (the center of each retinal non-convergence area is arranged at the vertex of the honeycomb structure) Pitch between retinal non-convergence areas (distance between the centers of retinal non-convergence areas): 1.5mm The outer clear area 4 is provided closer to the outer edge of the eyeglass lens 1 than the functional area 3. The entire area between the outer edge of the eyeglass lens 1 and the functional area 3 is the outer clear area 4 (this also applies to the following examples). The method for defining the central clear area 2 and the outer clear area 4 is the same as that in embodiment 1. The contents of this paragraph, other than the contents relating to the defocus power, are common to Specific Examples 1 to 6. The retinal non-convergence area (part 1) 3a1 provides the defocus power 1. The non-convergence area (part 2) 3a2 on the retina brings about defocus power 2. The non-convergence area (part 3) 3a3 on the retina causes defocus power 3.

[0140] In this specific example, the number of non-convergence areas on the retina that cause defocus power 1 was set to 102, and the number of non-convergence areas on the retina that cause defocus power 2 was set to 294.

[0141] <Example 2> FIG. 2 is a schematic plan view of a second specific example of a spectacle lens 1 according to an embodiment of the present invention.

[0142] In this specific example, the number of non-convergence areas on the retina that cause defocus power 1 was set to 129, and the number of non-convergence areas on the retina that cause defocus power 2 was set to 267, and their arrangement was changed as shown in Figure 2. Other than that, it was the same as the above specific example 1.

[0143] <Example 3> FIG. 3 is a schematic plan view of a <Specific Example 3> of the eyeglass lens 1 according to one aspect of the present invention.

[0144] In this specific example, the number of non-convergence areas on the retina that cause defocus power 1 was set to 210, and the number of non-convergence areas on the retina that cause defocus power 2 was set to 186, and their arrangement was changed as shown in Figure 3. Other than that, it was the same as the above-mentioned specific example 1.

[0145] <Example 4> FIG. 4 is a schematic plan view of a fourth specific example of a spectacle lens 1 according to an embodiment of the present invention.

[0146] In this specific example, the number of non-convergence areas on the retina that cause defocus power 1 was set to 196, and the number of non-convergence areas on the retina that cause defocus power 2 was set to 200, and their arrangement was changed as shown in Figure 4. Other than that, it was the same as the above-mentioned specific example 1.

[0147] <Example 5> FIG. 5 is a schematic plan view of a <Specific Example 5> of a spectacle lens 1 according to an embodiment of the present invention.

[0148] In this specific example, the contents relating to the defocus power are changed from those in the first specific example as follows. Number of defocus powers in the design of the retinal non-convergence area: 3 (Defocus power 1, which is brought about by the white circle in the figure, is 2.50D; defocus power 2, which is brought about by the hatched circle in the figure, is 3.50D; defocus power 3, which is brought about by the black circle in the figure, is 4.50D) The number of non-convergence areas on the retina that cause defocus power 1 was set to 126, the number of non-convergence areas on the retina that cause defocus power 2 to 138, and the number of non-convergence areas on the retina that cause defocus power 3 to 132, and their arrangement was changed as shown in Figure 5. Other than that, it was the same as the above-mentioned specific example 1.

[0149] <Example 6> FIG. 6 is a schematic plan view of a "sixth specific example" of a spectacle lens 1 according to an embodiment of the present invention.

[0150] In this specific example, the number of non-convergence areas on the retina that cause defocus power 1 is set to 129, the number of non-convergence areas on the retina that cause defocus power 2 is set to 138, and the number of non-convergence areas on the retina that cause defocus power 3 is set to 129, and their arrangements are changed as shown in Fig. 6. Other than that, the same as in the above specific example 1 is used.

[0151] <Example 7> FIG. 7 is a schematic plan view of a <Specific Example 7> of a spectacle lens 1 according to an embodiment of the present invention.

[0152] In this specific example, the following settings were made: Unless otherwise specified, the same settings as in Example 1 were made. Shape of the central clear area 2: Planar circular shape (diameter 9.0 mm) centered on the center of the lens (geometric center and eye point) Shape of functional area 3: Area centered on the center of the lens (geometric center and eye point) (diameter 34.0 mm, but annular area excluding clear area 2 on the central side) Number of defocus powers in the retinal non-convergence area: 2 (Defocus power 1, represented by the white circle in the figure, is 3.50D; defocus power 2, represented by the hatched circle in the figure, is 4.50D) Arrangement of retinal non-convergence areas in planar view: The centers of the retinal non-convergence areas are arranged on a single circumference and are not in contact with each other, and multiple such circumferences are arranged radially. Radius of the circle around which the center of each retinal non-convergence area is located: 5.03mm, 6.46mm, 7.89mm, 9.32mm, 10.75mm, 12.18mm, 13.61mm, 15.05mm, 16.48mm Total number of retinal non-convergence areas on each circumference (in the order of the radius values): 21, 27, 33, 39, 45, 51, 57, 63, 69 Circumferential pitch between retinal non-convergence areas (distance between the centers of retinal non-convergence areas): 1.5 mm In this example, the type of defocus power is changed for each circumference, as shown in Figure 7. In other words, only retinal non-convergence areas of one type of defocus power are arranged on one circumference. In this specific example, the number of non-convergence areas on the retina that result in defocus power 1 is set to 225, and the number of non-convergence areas on the retina that result in defocus power 2 is set to 180, and their arrangement is changed as shown in Figure 7.

[0153] <Example 8> FIG. 8 is a schematic plan view of an eighth specific example of a spectacle lens 1 according to an aspect of the present invention.

[0154] In this example, the contents relating to the defocus power are changed as follows from Example 7. Number of defocus powers in the design of the retinal non-convergence area: 3 (Defocus power 1, which is brought about by the white circle in the figure, is 2.50D; defocus power 2, which is brought about by the hatched circle in the figure, is 3.50D; defocus power 3, which is brought about by the black circle in the figure, is 4.50D) In this specific example, the number of non-convergence areas on the retina that cause defocus power 1 is set to 135, the number of non-convergence areas on the retina that cause defocus power 2 is set to 135, and the number of non-convergence areas on the retina that cause defocus power 3 is set to 135, and their arrangements are changed as shown in Figure 8.

[0155] <Example 9> FIG. 9 is a schematic plan view of a <Specific Example 9> of the eyeglass lens 1 according to one aspect of the present invention.

[0156] In this specific example, the number of non-convergence areas on the retina that cause defocus power 1 is set to 203, and the number of non-convergence areas on the retina that cause defocus power 2 is set to 202, and their arrangement is changed as shown in Figure 9. Other than that, it is the same as the above specific example 7. As shown in FIG. 9, this specific example does not exclude the possibility that non-convergence areas on the retina with a plurality of types of defocus powers are arranged on one circumference.

[0157] <Example 10> FIG. 10 is a schematic plan view of a <Specific Example 10> of a spectacle lens 1 according to one aspect of the present invention.

[0158] As shown in Figure 10, this example does not exclude the possibility of arranging non-convergence areas on the retina with multiple types of defocus power on one circumference. Other than that, it is the same as Example 8.

[0159] <Example 11> FIG. 11 is a schematic plan view of an eleventh specific example of a spectacle lens 1 according to an aspect of the present invention.

[0160] In this specific example, the following settings were made: Unless otherwise specified, the same settings as in Example 7 were made. Shape of the central clear area 2: Planar circular shape (diameter 7.6 mm) centered on the center of the lens (geometric center and eye point) Shape of functional area 3: Area centered on the center of the lens (geometric center and eye point) (diameter 35.4 mm, but annular area excluding clear area 2 on the central side) Arrangement of retinal non-convergence areas in planar view: The centers of the retinal non-convergence areas are arranged on a single circumference and are not in contact with each other, and multiple such circumferences are arranged radially. Radius of the circle around which the center of each retinal non-convergence area is located: 4.32mm, 5.75mm, 7.18mm, 8.61mm, 10.04mm, 11.47mm, 12.90mm, 14.33mm, 15.76mm, 17.19mm Total number of retinal non-convergence areas on each circumference (in the order of the radius values): 18, 24, 30, 36, 42, 48, 54, 60, 66, 72 In this example, the type of defocus power is changed for each circumference, as shown in Fig. 11. In other words, only retinal non-convergence areas of one type of defocus power are arranged on one circumference. In this specific example, the number of non-convergence areas on the retina that result in defocus power 1 is set to 210, and the number of non-convergence areas on the retina that result in defocus power 2 is set to 240, and their arrangement is changed as shown in Figure 11.

[0161] <Example 12> FIG. 12 is a schematic plan view of a <Specific Example 12> of a spectacle lens 1 according to one aspect of the present invention.

[0162] In this example, the contents relating to the defocus power are changed from those in Example 11 as follows. Number of defocus powers in the design of the retinal non-convergence area: 3 (Defocus power 1, which is brought about by the white circle in the figure, is 2.50D; defocus power 2, which is brought about by the hatched circle in the figure, is 3.50D; defocus power 3, which is brought about by the black circle in the figure, is 4.50D) In this specific example, the number of non-convergence areas on the retina that result in defocus power 1 is set to 180, the number of non-convergence areas on the retina that result in defocus power 2 is set to 126, and the number of non-convergence areas on the retina that result in defocus power 3 is set to 144, and their arrangements are changed as shown in Figure 12.

[0163] <Example 13> FIG. 13 is a schematic plan view of a <Specific Example 13> of a spectacle lens 1 according to one aspect of the present invention.

[0164] In this specific example, the number of non-convergence areas on the retina that cause defocus power 1 is set to 225, and the number of non-convergence areas on the retina that cause defocus power 2 is set to 225, and their arrangement is changed as shown in Fig. 13. Other than that, it is the same as the above-mentioned specific example 11. As shown in FIG. 13, this specific example does not exclude the case where non-convergence areas on the retina with a plurality of types of defocus power are arranged on one circumference.

[0165] <Example 14> FIG. 14 is a schematic plan view of a <Specific Example 14> of a spectacle lens 1 according to one aspect of the present invention.

[0166] As shown in FIG. 14, this specific example does not exclude the possibility that non-convergence areas on the retina with a plurality of types of defocus powers are arranged on one circumference. In this specific example, the number of non-convergence areas on the retina that cause defocus power 1 is set to 150, the number of non-convergence areas on the retina that cause defocus power 2 is set to 150, and the number of non-convergence areas on the retina that cause defocus power 3 is set to 150, and their arrangements are changed as shown in Figure 14. Other than that, the same as in Example 12 was used.

[0167] <Example 15> FIG. 15 is a schematic plan view of a <Specific Example 15> of a spectacle lens 1 according to one aspect of the present invention.

[0168] In this specific example, the following settings were made: Unless otherwise specified, the same settings as in Example 1 were made. Shape of the central clear area 2: Planar circular shape (diameter 9.4 mm) centered on the center of the lens (geometric center and eye point) Shape of functional area 3: Area centered on the center of the lens (geometric center and eye point) (diameter 34.0 mm, but annular area excluding clear area 2 on the central side) Number of defocus powers in the retinal non-convergence area: 2 (Defocus power 1, represented by the white circle in the figure, is 3.50D; defocus power 2, represented by the hatched circle in the figure, is 4.50D) -Planar arrangement of non-convergence areas on the retina: spiral arrangement (details below) A spiral is assumed to start near the origin of the XY plane (in this specification, the center of the lens, which is the eye point). The centers of multiple retinal non-convergence areas are placed on the spiral. The equation of the spiral is as follows: r=a(θ+θ0) a and θ0 are constants. Set θ0 = 0 in the row of center points of retinal non-convergence areas. Five other spirals are also assumed. Each spiral also has multiple centers of retinal non-convergence areas. In each spiral, θ0 = π / 3, 2π / 3, π, 4π / 3, and 5π / 3. Pitch between each retinal non-convergence area on the spiral (distance between the centers of the retinal non-convergence areas): 1.5 mm In this example, the type of defocus power is changed for each spiral, as shown in Figure 15. In other words, only one type of defocus power non-convergence area on the retina is arranged on one spiral. In this specific example, the number of non-convergence areas on the retina that result in defocus power 1 is set to 225, and the number of non-convergence areas on the retina that result in defocus power 2 is set to 225, and their arrangement is changed as shown in Figure 15.

[0169] <Example 16> FIG. 16 is a schematic plan view of a <Specific Example 16> of a spectacle lens 1 according to one aspect of the present invention.

[0170] In this specific example, the contents relating to the defocus power are changed from those in the above specific example 15 as follows. Number of defocus powers in the design of the retinal non-convergence area: 3 (Defocus power 1, which is brought about by the white circle in the figure, is 2.50D; defocus power 2, which is brought about by the hatched circle in the figure, is 3.50D; defocus power 3, which is brought about by the black circle in the figure, is 4.50D) In this specific example, the number of non-convergence areas on the retina that cause defocus power 1 is set to 150, the number of non-convergence areas on the retina that cause defocus power 2 is set to 150, and the number of non-convergence areas on the retina that cause defocus power 3 is set to 150, and their arrangements are changed as shown in Figure 16.

[0171] <Example 17> FIG. 17 is a schematic plan view of a <Specific Example 17> of a spectacle lens 1 according to one aspect of the present invention.

[0172] In this specific example, the number of non-convergence areas on the retina that cause defocus power 1 is set to 225, and the number of non-convergence areas on the retina that cause defocus power 2 is set to 225, and their arrangement is changed as shown in Fig. 17. Other than that, it is the same as the specific example 15. As shown in FIG. 17, this specific example does not exclude the arrangement of non-convergence areas on the retina with a plurality of types of defocus power on one spiral.

[0173] <Example 18> FIG. 18 is a schematic plan view of <Specific Example 18> of the eyeglass lens 1 according to one aspect of the present invention.

[0174] As shown in FIG. 18, this specific example does not exclude the possibility that non-convergence areas on the retina with a plurality of types of defocus powers are arranged on one spiral. In this specific example, the number of non-convergence areas on the retina that cause defocus power 1 is set to 150, the number of non-convergence areas on the retina that cause defocus power 2 is set to 150, and the number of non-convergence areas on the retina that cause defocus power 3 is set to 150, and their arrangements are changed as shown in Figure 18. Other than that, the same as in Example 15 was used.

[0175] The technical scope of the present invention is not limited to the above-described embodiments, but includes various modifications and improvements within the scope of the specific effects obtained by the constituent elements of the invention and their combinations. For example, the present invention is applicable not only to spectacle lenses but also to other ophthalmic lenses (e.g., contact lenses and intraocular lenses (for phakic or aphakic patients)). [Explanation of symbols]

[0176] 1. Eyeglass lenses 2. Clear area on the central side 3. Functional Area 3a1 Retinal non-convergence area (part 1) 3a2 Retinal non-convergence area (part 2) 3a3 Retinal non-convergence area (part 3) 3b Base region 4. Outer clear area EL1... (Line that forms the boundary between the outer clear area and the functional area) EL2 (shape of the central clear area) line

Claims

1. A spectacle lens that has an effect of inhibiting the progression of myopia or reducing hyperopia, a central clear area including the eye point, which causes a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the wearer's pupil, and converge on the retina, thereby realizing the wearer's prescribed refractive power; a functional area having an annular shape surrounding the central clear area, the functional area including: a base area for causing a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the wearer's pupil, and converge on the retina, thereby realizing the wearer's prescribed refractive power; and a retinal non-convergence area for causing a light beam incident from the object-side surface to exit from the eyeball-side surface, while not causing a light beam incident into the wearer's pupil to converge on the retina; Equipped with A spectacle lens that, when viewed in a plane, satisfies the following conditions for any circle that can be placed within the functional region, the circle having a diameter of 4 mm. <Condition 1> Within the circle is a base region. <Condition 2> There are multiple areas of non-convergence on the retina within the circle. <Condition 3> The circle includes a plurality of retinal non-convergence areas having different defocus powers set therein.

2. The eyeglass lens according to claim 1 , wherein the difference in defocus power between the plurality of on-retinal non-convergence areas under the condition 3 is 0.50 D or more.

3. The eyeglass lens of claim 1 , wherein the epiretinal non-convergence area is spherical.

4. The eyeglass lens according to claim 1 , wherein, in a planar view, the retinal non-convergence area is arranged in at least one of the following ways: (Aspect 1) In plan view, the retinal non-convergence areas are spaced apart from each other. (Aspect 2) The base area and the non-convergence area on the retina within the functional area are both annular zones. (Aspect 3) In planar view, the non-convergence areas on the retina are connected in a chain-like pattern.

5. The spectacle lens of claim 1 , wherein a portion of the plurality of retinal non-convergence regions has a defocusing power that increases with increasing distance from the center of the lens.

6. 2. The eyeglass lens according to claim 1, further comprising an outer clear area which is a region around the functional area and causes a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the pupil of the wearer, and converge on the retina, thereby realizing the wearer's prescribed refractive power.

7. 7. The eyeglass lens according to claim 1, wherein the retinal non-convergence area has a convex shape relative to the base area, and has an effect of inhibiting the progression of myopia.

8. A method for designing a spectacle lens that has an effect of inhibiting the progression of myopia or reducing hyperopia, comprising: a central clear area including the eye point, which causes a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the wearer's pupil, and converge on the retina, thereby realizing the wearer's prescribed refractive power; a functional area having an annular shape surrounding the central clear area, the functional area including: a base area for causing a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the wearer's pupil, and converge on the retina, thereby realizing the wearer's prescribed refractive power; and a retinal non-convergence area for causing a light beam incident from the object-side surface to exit from the eyeball-side surface, while not causing a light beam incident into the wearer's pupil to converge on the retina; Equipped with A method for designing a spectacle lens, the method comprising: designing a spectacle lens such that, when a circle with a diameter of 4 mm is placed within the functional region in a planar view, the following condition is satisfied for any circle that can be placed within the functional region: <Condition 1> Within the circle is a base region. <Condition 2> There are multiple areas of non-convergence on the retina within the circle. <Condition 3> The circle includes a plurality of retinal non-convergence areas having different defocus powers set therein.

9. the retinal non-convergence area has two to four types of spherical shapes set to the mutually different defocus power values, 9. The method for designing eyeglass lenses according to claim 8, wherein, for some of the types, the defocus power of the on-retinal non-convergence region is increased from the defocus power set for the some of the types as the distance from the lens center increases.

10. 9. The method for designing eyeglass lenses according to claim 8, further comprising an outer clear area, which is an area around the functional area, and causes a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the pupil of the wearer, and converge on the retina, thereby realizing the prescribed refractive power of the wearer.

11. The method for designing a spectacle lens according to any one of claims 8 to 10, wherein the retinal non-convergence area has a convex shape with respect to the base area, and has an effect of inhibiting the progression of myopia.

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