Eyeglass lens and eyeglasses

Abstract

Provided is a spectacle lens in which at least some second refraction regions and a plurality of second refraction regions are arranged side by side on an object-side surface or an eyeball-side surface so as to form rings, the rings being provided with an inner ring and an outer ring surrounding the inner ring, the position of the center of the inner ring and the position of the center of the outer ring being different when the spectacle lens is viewed in plan view, and one among the following conditions being satisfied. Also provided is art related thereto. Condition 1: The interval between the rings in the radial direction is wider than the interval between the second refraction regions in the rings in the circumferential direction. Condition 2: The interval between the rings in the radial direction is narrower than the interval between the second refraction regions in the rings in the circumferential direction.

Description

Eyeglass lenses and glasses

[0001] The present invention relates to spectacle lenses and spectacles.

[0002] Fresnel lenses are known as spectacle lenses that suppress the progression of refractive errors such as myopia. Patent Document 1, which relates to such lenses, describes the following: Claim 1 of Patent Document 1 describes a method for treating the progression of refractive errors in a human eye, the method including: (a) providing a Fresnel lens having a first optical zone with a first refractive power and a second optical zone with at least one second refractive power; and (b) correcting the refractive error using the first refractive power and generating at least one defocus using the second refractive power.

[0002] Patent Document 1 also describes that myopia and hyperopia are common refractive errors of the human eye.

[0012] Patent Document 1 also describes a method for treating the progression of refractive errors in a human eye, the method including providing a Fresnel lens having a first optical zone and a second optical zone. A Fresnel-type concentric bifocal or multifocal lens having a first optical zone, an alternating central optical zone 41, with a prescribed refractive power, and a second refractive zone, an alternating central optical zone 42, which generates defocus, is shown in Figures 4a and 4b of Patent Document 1.

[0003] Patent Document 2 describes a configuration in which the second refractive power area is cylindrical in shape instead of a Fresnel lens.

[0004] Spectacle lenses with configurations different from those described in Patent Documents 1 and 2 are also known. Examples of such spectacle lenses include those in which island-shaped regions having a refractive power more positive than the prescribed refractive power are formed on the lens (see, for example, Patent Document 3). Spectacle lenses of the configuration described in Patent Document 3, etc., shown below, are also called DIMS (Defocus Incorporated Multiple Segments) spectacle lenses, or DIMS for short. Hereinafter, these island-shaped regions may also be referred to as defocus regions.

[0005] Claim 1 of Patent Document 3 describes the following: A spectacle lens is described, which comprises: a first refractive region having a first refractive power based on a prescription for correcting refractive error of the eye; and a second refractive region having a refractive power different from the first refractive power and having a function of focusing light at a position other than the retina of the eye so as to suppress the progression of the refractive error of the eye, wherein the second refractive region is formed as a number of independent island-like regions near the center of the lens, and the first refractive region is formed in a region other than the region where the second refractive region is formed. A myopia progression suppression lens is described as this spectacle lens.

[0006] Patent Document 4 describes that a plurality of at least three optical elements have an optical function of not focusing an image on the retina of the eye under standard wearing conditions and peripheral vision so as to slow the progression of abnormal refraction of the eye (Claim 1, Figures 14a, 14b, and 15).

[0007]

[0102] of Patent Document 5 describes that by changing the convex portion of the substrate of a spectacle lens to a concave portion, a function of reducing hyperopia can be achieved.

[0008] Patent Document 6 describes a lens for inhibiting the progression of myopia from the viewpoint of modulation transfer function (MTF). It also discloses that a periodic uneven structure suppresses contrast at a specific spatial frequency, thereby providing a myopia suppression effect.

[0009] JP 2008-514318 A, CN111103701 A, US2017 / 0131567 A, WO2019 / 166657 B, WO2020 / 045567 B, WO2021 / 249846 B,

[0010] When a parallel beam of light passes through the spectacle lens from a sufficiently distant location and enters the pupil, the convex area of ​​the spectacle lens provides a refractive effect in accordance with its shape, whereas when divergent light passes through the spectacle lens from a location close to the wearer of the spectacle lens and enters the pupil, the convex area of ​​the spectacle lens provides only a low refractive effect.

[0011] Fig. 1A is an explanatory diagram showing the state of a spherical wave (φ4, i.e., within a pupil diameter of 4.0 mm, shown behind the eyeball) when a parallel light beam from a sufficiently far away passes through a myopia progression retarding lens and enters the pupil. Fig. 1B is an explanatory diagram showing the state of a spherical wave (φ4, i.e., within a pupil diameter of 4.0 mm, shown behind the eyeball) when divergent light from close to the wearer of the myopia progression retarding lens passes through the myopia progression retarding lens and enters the pupil.

[0012] In FIG. 1A, a spherical wave corresponding to each micro-convex portion (referred to as a convex region in this specification) is generated. On the other hand, in FIG. 1B, divergent light passing through each convex region enters the pupil from diagonally downward to diagonally upward. Therefore, compared to each spherical wave in FIG. 1A, one spherical wave is elongated in the vertical direction of the page. The ratio of this elongation is approximately (1 + L / T), where L [mm] is the corneal vertex distance and T [mm] is the distance from the lens to the object during near vision. While the retina would normally receive a spherical wave corresponding to each convex region, this is not the case when using a myopia progression retarding lens for near vision, resulting in only a low refractive effect. Specifically, the apparent power decreases in inverse proportion to the square of the elongation ratio, i.e., the apparent power is 1 / (1 + L / T)^2 of the actual power. For example, when L=12 mm and T=300 mm, the elongation ratio is 1.04, and the apparent power is 1 / 1.08 of the original power. This phenomenon may be called "a decrease in apparent power."

[0013] Furthermore, from the viewpoint of MTF, the spatial frequency at which contrast is suppressed is determined by the period of the structure. When the apparent period is elongated, the spatial frequency at which contrast is suppressed increases by the ratio of the elongation. For example, in a configuration in which the first refractive region and the second refractive region are provided 2 mm apart in the meridional direction and 1 mm apart in the sagittal direction, for light having a wavelength of 530 nm from infinity, the contrast is suppressed at a spatial frequency of 33 CPD in the meridional direction and at a spatial frequency of 66 CPD in the sagittal direction, but the suppressed spatial frequencies are shifted to 34.32 CPD and 68.64 CPD, respectively, due to the elongation.

[0014] This phenomenon also occurs because the refractive effect is determined by (incident height on the lens x refractive power), and when divergent light is incident, the incident height is relatively low on glasses that are located in front of the pupil.

[0015] The above-mentioned problem may also occur in the DIMS. In order to solve the above-mentioned problem, it is conceivable to take measures to irregularly arrange the many defocus regions in the DIMS. Unlike the Fresnel lens, the DIMS has many defocus regions, and it is conceivable to take measures to solve the above-mentioned problem by arranging each defocus region as desired.

[0016] However, adopting the above-mentioned method brings about new problems that must be considered. Specifically, irregularly arranging the defocus regions increases the difficulty of processing, and further increases the difficulty of measuring the DIMS obtained after processing.

[0017] The Fresnel lens originally has a ring-shaped configuration in a planar view. For example, the Fresnel lens shown in Figures 4a and 4b of Patent Document 1 has a rotationally symmetric shape with respect to a common center point, with alternating central optical zones 41 and 42. This rotationally symmetric shape is annular, i.e., rotationally symmetric, even when viewed relative to the eyeball-side surface on which the ring-shaped configuration is formed (planar view), and is also rotationally symmetric in any cross-sectional view that passes through the center point and is a cross section relative to the planar view. Therefore, the difficulty of processing and measuring the Fresnel lens does not increase significantly.

[0018] To add a bit about the difficulty of processing, the Fresnel lens has a rotationally symmetric shape and is easy to lathe. In this respect, it differs from the DIMS lens in which the second refractive region is formed as a number of independent island-like regions near the center of the lens. Whether a cutting process is performed to directly form the ring-shaped structure on the eyeglass lens, or whether the ring-shaped structure is formed on a mold when manufacturing the eyeglass lens by injection molding using a mold, lathe processing is easy. The ease of lathe processing means that low-cost, high-precision processing is possible.

[0019] To add a bit more about the difficulty of measurement, lens measuring instruments usually have a mode for scanning circumferentially in a planar view, so the difficulty of measuring a Fresnel lens, which has a rotationally symmetrical shape, is not increased.

[0020] As a result of considering the problems of "low refractive power" and "difficulty of processing and measurement" that have been mentioned so far, the inventors discovered DIMS, which partially adopts the concept of a Fresnel lens.

[0021] Specifically, the inventor discovered that the above problem can be solved by arranging at least a portion of the second refractive region in the form of a ring on the object-side surface or the eyeball-side surface in a planar view, providing multiple rings, and shifting the position of the center of rotation between the ring closer to the center of the ring and the ring farther from the center of the ring in a planar view.

[0022] More specifically, it was discovered that the rings are arranged closely together on the nose side of the spectacle lens through which the line of sight passes during near vision, so that the rings can fully exert their refractive effect. With this configuration, the difficulty of processing and measuring the second refractive area is not so great compared to when the second refractive area is irregularly arranged, because the second refractive area is in the form of a ring.

[0023] In this specification, "at least a portion of the second refractive region is arranged in a ring shape on the object-side surface or the eyeball-side surface" includes a case in which circular segments (referred to as "second refractive regions" in this specification) are strung together to form a ring in a planar view, as shown in FIG. 15 of Patent Document 4, a case in which the second refractive regions are not connected to each other but are arranged in a ring shape, and a case in which both strung and unconnected regions are mixed. The following examples mainly illustrate cases in which the second refractive regions are strung together to form a ring. For convenience of explanation, this "arrangement in a ring shape" is also referred to as a "(second) ring-shaped region" in this specification, omitting the description of each second refractive region and considering it as a rough ring shape. The width of the ring-shaped region corresponds to the diameter of the segment (referred to as "second refractive region" in this specification) in a planar view (or the width of the segment in the radial direction of the eyeglass lens).

[0024] When the second refractive regions are connected in a daisy chain, the second ring-shaped region includes the second refractive regions and the first refractive regions so as to fill the gaps, as shown in Fig. 2A. When the second refractive regions are not connected in a daisy chain, the second ring-shaped region includes the second refractive regions and the first refractive regions so as to fill the gaps, as shown in Fig. 2B.

[0025] In this specification, the term "annular region" refers to a substantially circular region having a width. In this specification, the center of the circle passing through the center of the width of the ring is referred to as the "center of the ring." The center of the circle formed by the inside of the ring and the center of the circle formed by the outside of the ring are both located at the same position as the center of the ring.

[0026] However, the inventors' investigations have revealed that there are further improvements that need to be made in addition to the configuration based on the above findings.

[0027] For example, even if segments are connected in a ring shape as shown in Figure 15 of Patent Document 4, it becomes necessary to consider the relationship between the radial (meridional) spacing between each ring and the circumferential (sagittal) spacing between each segment within each ring. For example, if, on a single lens, the radial spacing between each ring on the nose side is wider than the circumferential spacing between each segment within each ring, while the radial spacing between each ring on the ear side is narrower than the circumferential spacing between each segment within each ring, the wearer is likely to feel uncomfortable. In other words, even if the "low refractive effect" is solved, the design freedom provided by the large number of defocus regions in the above-mentioned DIMS may adversely affect wearing comfort in the form of the freedom of radial and circumferential spacing.

[0028] The above problem applies not only to the case where the spectacle lens is a myopia progression suppression lens and the second refractive region is a convex region, but also to the case where the spectacle lens is a hyperopia reduction lens and the second refractive region is a concave region.

[0029] One embodiment of the present invention aims to prevent an increase in the difficulty of processing and measuring a lens for inhibiting myopia progression or a lens for reducing hyperopia, while maintaining the wearing comfort, including preventing a decrease in the refractive effect of the second refractive region in near vision.

[0030] The following aspects have been created based on the above findings. Among the following aspects, aspects that depend on an independent aspect can be arbitrarily combined with other dependent aspects and / or other independent aspects.

[0031] A first aspect of the present invention is a spectacle lens comprising: a first refractive region having a first refractive power that achieves a prescribed refractive power for a wearer; and a second refractive region having a second refractive power different from the first refractive power, wherein at least a portion of the second refractive region and a plurality of second refractive regions are arranged side by side in the form of a ring on the object-side surface or the eyeball-side surface, the ring comprising an inner ring and an outer ring surrounding the inner ring, the positions of the centers of the inner ring and the outer ring being different when the spectacle lens is viewed in a plan view, and the spectacle lens satisfies any of the following conditions: <Condition 1> The radial spacing between each ring is wider than the circumferential spacing between the second refractive regions within each ring. <Condition 2> The radial spacing between each ring is narrower than the circumferential spacing between the second refractive regions within each ring.

[0032] A second aspect of the present invention is the eyeglass lens according to the first aspect, wherein at least a portion of the ring is configured by a plurality of second refractive regions connected in a chain.

[0033] A third aspect of the present invention is a spectacle lens having an effect of inhibiting the progression of myopia, according to the first or second aspect, wherein the second refractive region is a protruding portion when viewed from the first refractive region.

[0034] A fourth aspect of the present invention is a pair of glasses comprising the eyeglass lens according to the first or second aspect and an eyeglass frame.

[0035] The protruding height of each second ring-shaped region (the amount of protrusion from the first ring-shaped region) is preferably about 0.1 to 10 μm, and more preferably about 0.4 to 2.0 μm.

[0036] In plan view, the proportion of the area of ​​the surface on which the second annular region group is formed may be 20 to 60%.

[0037] Each second refractive region (also referred to as a "segment" in this specification) is configured, for example, as follows: The diameter of the segment in plan view is preferably about 0.6 to 2.0 mm. The surface area of ​​each segment is preferably 0.50 to 3.14 mm. ２ The radius of curvature of the segment is 50 to 250 mm, preferably about 86 mm, and is spherical.

[0038] Although there are no specific limitations on the numerical value of the defocus power in each second annular region, for example, it is preferable that the minimum value of the defocus power provided by the defocus region 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.

[0039] In the case of a spectacle lens that has a hyperopia reduction effect, the "convex" in the description of the second refractive region may be read as "concave." Also, in the case of a spectacle lens that has a hyperopia reduction effect, the value described in this item may be used by appropriately inverting the positive and negative signs.

[0040] As a guideline for the lower limit of the size of the central clear area, it is sufficient if it is large enough to contain a circle with a diameter of 5.00 mm and centered at the eye point EP. As a guideline for the upper limit of the size of the central clear area, it is sufficient if it is large enough to fit within a circle with a diameter of 10.00 mm and centered at the eye point EP. The area of ​​the central clear area is 80 mm. ２ The shape of the center side clear area may be, for example, a circular shape, as long as it is rotationally symmetrical in a plan view.

[0041] The requirement that the width of the nose side of each first annular region monotonically decreases outward may be satisfied. For example, when the width of the nose side of any first annular region is compared with the width of the nose side of the first annular region immediately outside it, the two widths may be equal, or the more outer the first annular region is, the smaller the width of the nose side of the outer first annular region may be.

[0042] An example of a specific numerical range for each component is as follows: Ring width of first annular region: 0.5 to 1.5 mm Ring width of second annular region: 0.5 to 1.5 mm Ratio of ring width of second annular region to ring width of first annular region: 1:2 to 2:1 In one aspect of the present invention, this "ring width of the first annular region" also refers to the radial spacing between each of the second annular regions. The above numerical ranges are only valid when the above condition 1 or condition 2 is satisfied. Note that, for example, the circumferential spacing between the second refractive regions within each of the second annular regions may be 0 to 1.5 mm, and the value of (circumferential spacing between the second refractive regions within each of the second annular regions) / (diameter of the second refractive region within each of the second annular regions) may be 0 to 2. The following conditional formula may be satisfied: ((L-D_k) / (L-D_1)) ３／２ <W_k / W_1<((LD_k) / (LD_1)) １／２

[0043] The requirement that the width of the ear side of each first annular region monotonically increases outward may be satisfied. For example, when the width of the ear side of any first annular region is compared with the width of the ear side of the first annular region immediately outside it, the two widths may be equal, or the ear side width of the outer first annular region may increase as the first annular region becomes more outward.

[0044] As an example, in a first annular region (one if there is an odd number of first annular regions, and both if there is an even number of first annular regions) located midway between the first annular region farthest from the eyepoint and the first annular region closest to the eyepoint, the width on the ear side may be greater than the width on the nose side.

[0045] According to one embodiment of the present invention, in a myopia progression suppression lens or a hyperopia reduction lens, the wearing comfort can be maintained, including suppressing the decrease in the refractive effect of the second refractive region in near vision, while the difficulty of processing and measuring can be reduced.

[0046]

[0023] Fig. 1A is an explanatory diagram showing the state of a spherical wave when a parallel light beam from a sufficient distance passes through a myopia progression inhibiting lens and enters the pupil. Fig. 1B is an explanatory diagram showing the state of a spherical wave when divergent light from close to the wearer of the myopia progression inhibiting lens passes through the myopia progression inhibiting lens and enters the pupil. Fig. 2A is a schematic plan view of a spectacle lens showing the state in which, when the second refractive regions are connected in a daisy-chain configuration, the second annular region includes the second refractive region and the first refractive region so as to fill the gaps. Fig. 2B is a schematic plan view of a spectacle lens showing the state in which, when the second refractive regions are not connected in a daisy-chain configuration, the second annular region includes the second refractive region and the first refractive region so as to fill the gaps, as shown in Fig. 2B. Fig. 3 is a front view of a spectacle lens according to one embodiment of the present invention, showing the state in which only the fourth second annular region counting from the inside is displaced to the left (towards the nose). Fig. 4 is a front view showing a spectacle lens according to another embodiment of the present invention, showing only the first, third, and fifth second annular regions, counting from the inside, displaced to the left (toward the nose). Segments are omitted. Fig. 5 is an explanatory schematic diagram showing a spectacle lens according to Comparative Example 1 in a front view, in which the segments of the second annular region are indicated in black. Fig. 6 is an explanatory schematic diagram showing a spectacle lens according to Example 1 in a front view, in which the segments of the second annular region are indicated in black, and the right-hand view is a partial enlarged view of the left-hand view.

[0047] One embodiment of the present invention will be described below. The following description based on the drawings is an example, and the present invention is not limited to the exemplified embodiment. In this specification, the symbol "to" indicates a value greater than or equal to a predetermined value and less than or equal to a predetermined value.

[0048] <Definitions> The spectacle lenses mentioned in this specification have an object-side surface and an eyeball-side surface. The "object-side surface" is the surface that is located on the object side when spectacles equipped with the spectacle lens are worn by a wearer. The "eyeball-side surface" is the opposite, i.e., the surface that is located on the eyeball side when spectacles equipped with the spectacle lens are worn by a wearer. The object-side surface is generally a convex surface and the eyeball-side surface is generally a concave surface, that is, spectacle lenses are meniscus lenses.

[0049] In this specification, the left-right direction when facing the object-side surface of the spectacle lens (hereinafter referred to as plan view) is defined as the x-direction, the up-down direction as the y-direction, and the thickness direction of the spectacle 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 spectacle lens. The origin is defined as the eyepoint. In this specification, a case in which the eyepoint and the geometric center approximately coincide will be illustrated. The right (3 o'clock direction) is defined as the +x-direction, the left (9 o'clock direction) as the -x-direction, the up (0 o'clock direction) as the +y-direction, the down (6 o'clock direction) as the -y-direction, the object side direction as the +z-direction, and the opposite direction (toward the back) as the -z-direction. The x-direction is also referred to as the x-axis, the y-direction as the y-axis, and the z-direction as the z-axis. The content of this paragraph can be rephrased as follows: "When the spectacle lens is worn, the axis passing through the lens center from the object side toward the eyeball side is defined as the z-axis, the axis extending from bottom to top and perpendicular to the z-axis is defined as the y-axis, and the axis extending from left to right and perpendicular to the z-axis is defined as the x-axis."

[0050] When a third party looks straight ahead at the person wearing the eyeglasses, the −x direction of the left-eye lens is the nose side and the +x direction is the ear side as seen by the third party. Figure 3 shown below relates to the left-eye lens.

[0051] In this specification, the term "nasal side" refers to a predetermined direction (e.g., the -x direction) from the eye point (origin) toward the region where x<0 in a left-eye lens. This definition takes into account the fact that the line of sight drops and moves toward the nose (inward) during near vision. In this specification, the term "ear side" refers to a predetermined direction (e.g., the +x direction) from the eye point (origin) toward the region where x>0 in a left-eye lens. Considering the fact that the line of sight drops during near vision, the "predetermined direction from the eye point (origin) toward the region where x<0 in a left-eye lens" may refer to a predetermined direction from the eye point (origin) toward the region where x<0 and y≦0 (preferably, y≧2x). Furthermore, in this specification, the terms "nasal side" and "ear side" may be opposite directions. On the other hand, for example, the nasal side may be considered to be the direction along y=x, while the ear side may be considered to be the direction along y=0. For right-eye lenses, the magnitude relationship described in this paragraph can be reversed to define the nasal side and ear side.

[0052] Unless otherwise specified, this specification will discuss the state when a third party looks straight ahead at the state of wearing the eyeglasses. When the eyeglass lenses are placed on a stand, the object-side surface or the eyeball-side surface is oriented in the direction of the sky. Therefore, when discussing the configuration of each surface of the eyeglass lenses, a planar view is assumed. When a second ring-shaped region is formed on the eyeball-side surface, the orientation when facing the eyeball-side surface is considered to be a planar view.

[0053] The "eye point (EP)" is the position where the line of sight passes when the eyeglass lens is worn and the wearer looks straight ahead. In one aspect of the present invention, the eye point is aligned with the prism reference point. In another aspect of the present invention, the eye point is positioned midway between two hidden marks.

[0054] In this specification, the eye point side of the eyeglass lens is referred to as the inside, and the side of the outermost edge of the eyeglass lens is referred to as the outside. In this specification, expressions such as "closest to the eye point" are used, and the direction closer to the eye point (center of the lens) is referred to as the inside, and the opposite direction, that is, the direction away from the eye point (direction from the eye point toward the outer edge of the lens), is referred to as the outside.

[0055] In this specification, an example will be given in which the eye point coincides with the geometric center or centering center. The eye point may also be called the optical center or lens center.

[0056] Incidentally, the prescription data of the wearer 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 as an object based on the prescription data of the wearer, including whether it is for the right eye or the left eye. Furthermore, eyeglass lenses usually come as a 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.

[0057] The eye point can be determined by referring to a remark chart or a centration chart issued by a lens manufacturer.

[0058] In this specification, "equal" includes a case where a numerical value B to be compared is equal to a reference numerical value A (e.g., a distance or a coordinate value), and also includes a case where 0.8≦B / A≦1.2 (preferably 0.9≦B / A≦1.1, and more preferably 0.95≦B / A≦1.05).

[0059] In this specification, "when the eyeglass lens is viewed in a plan view, the position of the center of the inner ring and the position of the center of the outer ring are different" means, for example, that the distance between the positions of the two centers is 0.01 mm or more (or 0.1 mm or more, 0.5 mm or more, or 1 mm or more).

[0060] <Eyeglass Lens According to One Aspect of the Present Invention> Figure 3 is a front view of an eyeglass lens according to one aspect of the present invention, showing only the fourth second annular region counting from the inside displaced to the left (toward the nose). While Figure 3 illustrates an example in which there are six second annular regions, in the following examples, eleven second annular regions are provided. Reference numeral 1 denotes the eyeglass lens, reference numeral 2 denotes the central clear region (described below), and reference numeral 4 denotes the outer clear region (described below). Reference numeral EP denotes the eye point. Reference numeral 3a denotes the first annular region group (described below), and reference numeral 3b denotes the second annular region group (described below). The numbers 1, 2, 3, etc. following reference numerals 3a and 3b indicate the order of proximity to the eye point EP. Reference numeral C denotes the center of the second annular region, and the numbers 1, 2, 3, etc. following reference numeral C denote the centers of the second annular regions 3b1, 3b2, 3b3, etc. 3 illustrates a case where the center of the second ring-shaped region 3b9, which is the farthest from the eye point EP, is coincident with the eye point EP.

[0061] A spectacle lens according to one aspect of the present invention comprises: a first refractive region having a first refractive power that realizes a prescribed refractive power for a wearer; and a second refractive region having a second refractive power different from the first refractive power, wherein at least a portion of the second refractive region and a plurality of second refractive regions are arranged in a ring on the object-side surface or the eyeball-side surface, the ring comprising an inner ring and an outer ring surrounding the inner ring, and the positions of the centers of the inner ring and the outer ring are different when the spectacle lens is viewed in a plan view, and the spectacle lens satisfies any of the following conditions: <Condition 1> The radial spacing between each ring (each second annular region described below) is wider than the circumferential spacing between the second refractive regions within each ring (each second annular region described below). <Condition 2> The radial spacing between each ring (each second annular region described below) is narrower than the circumferential spacing between the second refractive regions within each ring (each second annular region described below).

[0062] In one aspect of the present invention, when the above condition 1 is adopted, the above condition 1 is satisfied in every ring and every second refractive region within that ring in a single spectacle lens. Similarly, when the above condition 2 is adopted, the above condition 2 is satisfied in every ring and every second refractive region within that ring in a single spectacle lens.

[0063] For example, when the above condition 1 is adopted, the radial distance is wider than the circumferential distance on both the nose side and ear side as viewed from the eyepoint. Similarly, when the above condition 2 is adopted, the radial distance is narrower than the circumferential distance on both the nose side and ear side as viewed from the eyepoint.

[0064] By adopting this configuration, it is possible to achieve a balance between the circumferential direction and the radial direction while employing DIMS, and the wearing comfort is not reduced. Hereinafter, an example will be given in which condition 1 is adopted.

[0065] At least a portion of the ring may be configured by a plurality of second refractive regions connected in a daisy chain. As shown in Patent Document 4, the entire ring may be configured by a plurality of second refractive regions connected in a daisy chain. In the case of a daisy chain, the circumferential spacing between the second refractive regions within each ring (each second ring-shaped region) is considered to be zero.

[0066] Hereinafter, for the sake of convenience, as one aspect of the present invention, a spectacle lens having a myopia progression suppression effect will be exemplified, and a case where the second refractive region is a convex region will be exemplified. In other words, a case where the second refractive region is a protruding portion as viewed from the first refractive region will be exemplified. On the other hand, in the case of a spectacle lens having a hyperopia reduction effect, the "convex" in the following description regarding the second refractive region can be read as "concave." Furthermore, in the case of a spectacle lens having a hyperopia reduction effect, the values ​​described in this section may be used by appropriately inverting the positive and negative sides.

[0067] A spectacle lens according to one aspect of the present invention employs part of the concept of a Fresnel lens. Based on this concept, the spectacle lens according to one aspect of the present invention includes a plurality of second annular regions, which are annular regions formed by second refractive regions when the spectacle lens is viewed in a plan view. The plurality of second annular regions are referred to as a second annular region group. The spectacle lens also includes a plurality of first annular regions, each sandwiched between each second annular region and formed by a first refractive region. The plurality of first annular regions are referred to as a first annular region group. The first annular regions and the second annular regions are alternately arranged adjacent to each other outward from the eye point.

[0068] One feature of one aspect of the present invention is that the second annular regions are densely arranged on the nose side extending outward from the eyepoint, while the second annular regions are sparsely arranged on the ear side extending outward from the eyepoint.

[0069] In one aspect of the present invention, the second annular region is densely arranged on the nose side of the spectacle lens so that the second annular region can fully exert its refractive effect.

[0070] With this configuration, in one aspect of the present invention, it is possible to suppress a decrease in the refractive effect of the second annular region in near vision.

[0071] Furthermore, since the relationship between the radial distance between each ring, i.e., between each second ring-shaped region, and the circumferential distance between each segment within each ring is constant, wearing comfort can be maintained. Furthermore, because the DIMS lens partially adopts a ring-shaped arrangement (a Fresnel lens concept), it is possible to suppress an increase in the difficulty of processing and measuring.

[0072] By arranging the second ring-shaped region densely on the nose side, the second ring-shaped region is naturally arranged sparsely on the ear side. This configuration can achieve another effect in addition to the effect of the present invention described above.

[0073] For example, in the case of a lens for the left eye, during distance and side viewing, the line of sight passes through the region where y > 0 and x > 0. Since the second ring-shaped region is densely arranged on the nose side, the second ring-shaped region is dense in the region where x < 0, but conversely, the second ring-shaped region is sparse in the region where x > 0.

[0074] The sparseness of the second annular region means that the area occupied by the first annular region (the first refractive region having the prescribed refractive power) is larger on the ear side than on the nose side. In other words, when viewing far and to the side, the state is closer to that of wearing normal eyeglass lenses.

[0075] In other words, in one aspect of the present invention, the center positions of the second annular region closer to the eyepoint and the second annular region farther from the eyepoint are made different, so that the second annular regions are densely arranged on the nose side extending outward from the eyepoint.

[0076] The first refractive region is a portion having a smooth surface shape that can realize the wearer's prescribed refractive power from a geometrical optics perspective, and is, for example, a portion that is transparent in the visible light wavelength range. The first refractive region corresponds to the first refractive region of Patent Document 3. The first refractive region of one aspect of the present invention functions as a so-called single-vision lens.

[0077] In one aspect of the present invention, the inside of the second annular region closest to the eyepoint is a central clear region, which is a first refractive region, and the eyepoint is located within this central clear region. The central clear region and the first annular region group may be collectively referred to as simply a "clear region." The clear region may also be collectively referred to as a clear region, including the outer clear region described below. The clear region is a region that causes a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the wearer's pupil, and be focused on the retina.

[0078] The first refractive region of one aspect 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 viewing straight ahead (distance from an object is approximately from infinity to 1 m) (for example, distance power; hereinafter, distance power will be exemplified), or may be a power to be corrected when viewing at intermediate distances (1 m to 40 cm) or near distances (40 cm to 10 cm).

[0079] For the sake of convenience, the present specification refers to the center or upper portion of the spectacle lens as the distance portion, and the lower portion of the spectacle lens as the near portion. The lower portion is the portion through which the line of sight passes when viewing an object at a distance shorter than the distance to the object defined by the first refractive region. The distance portion and near portion in this specification are concepts different from the distance portion and near portion used in progressive power lenses.

[0080] The second refractive region corresponds to the alternating central optical zone 42 described in Patent Document 1, and is an annular region having a second refractive power different from the first refractive power.

[0081] The second refractive region according to one aspect of the present invention is composed of a plurality of annular convex regions (second annular regions) that provide a positive defocusing power so that a light beam incident on the object-side surface exits from the eyeball-side surface, while a light beam incident on the wearer's pupil is focused in front of the light beam that has passed through the base region. The second refractive region may also be referred to as a defocusing region, or may be a region having a power different from the prescribed power, a so-called retinal non-focusing region, or a region that does not focus a light beam incident on the wearer's pupil on the retina. In one aspect of the present invention, the region other than the second refractive region is the first refractive region.

[0082] The defocus area is an area in which, from the viewpoint of geometrical optics, at least a part of the area does not cause light to be focused at the light-focusing position of the clear area.

[0083] The protruding height of each second ring-shaped region (the amount of protrusion from the first ring-shaped region) is preferably about 0.1 to 10 μm, and more preferably about 0.4 to 2.0 μm.

[0084] In plan view, the proportion of the area of ​​the surface on which the second annular region group is formed may be 20 to 60%.

[0085] Each second refractive region (also referred to as a "segment" in this specification) is configured, for example, as follows: The diameter of the segment in plan view is preferably about 0.6 to 2.0 mm. The surface area of ​​each segment is preferably 0.50 to 3.14 mm. ２ The radius of curvature of the segment is 50 to 250 mm, preferably about 86 mm, and is spherical.

[0086] There is no limitation on the three-dimensional shape of the segments. As in one aspect of the present invention, the segments may be configured with curved surfaces (either spherical surfaces, aspherical surfaces, or a combination thereof), or may be configured with discontinuous surfaces other than curved surfaces.

[0087] For example, the central portion of the segment may be spherical, while the remaining peripheral portion may be aspherically curved. In this case, the boundary between the central portion and the peripheral portion is the point where the spherical shape changes to the aspherically curved shape. The boundary between the central portion and the peripheral portion may be located at 1 / 3 to 2 / 3 of the radius in plan view. Of course, the entire segment may be aspherically curved.

[0088] Although there are no specific limitations on the numerical value of the defocus power in each second annular region, for example, it is preferable that the minimum value of the defocus power provided by the defocus region 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.

[0089] The "defocus power" refers to the difference between the refractive power of each second annular region, which is a defocus region, and the refractive power of the portion other than each second annular region (clear region). In other words, the "defocus power" is the difference obtained by subtracting the refractive power of the base portion from the average value of the minimum and maximum refractive powers at a predetermined point in the defocus region.

[0090] In this specification, the term "refractive power" refers to the average refractive power, which is the average value of 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).

[0091] <Specific examples or preferred examples of eyeglass lenses according to one aspect of the present invention> There are no limitations on the size and shape of the central clear region. As a rough guide for the lower limit of the size of the central clear region, it is sufficient that it is large enough to contain a circle with a diameter of 5.00 mm and centered at the eye point EP. As a rough guide for the upper limit of the size of the central clear region, it is sufficient that it is large enough to fit within a circle with a diameter of 10.00 mm and centered at the eye point EP. The area of ​​the central clear region is 80 mm ２ The shape of the center side clear area may be rotationally symmetric in plan view, for example, may be circular.

[0092] Preferred examples relating to near vision will be given below.

[0093] In the second annular region group, the center of the second annular region closest to the eyepoint is preferably shifted toward the nose with respect to the center of the second annular region farther from the eyepoint, so that when the line of sight passes through the center clear region in near vision, the object can be more reliably viewed through the center clear region that is closer to the eyepoint.

[0094] The center position of each second annular region constituting the second annular region group may be monotonically displaced toward the nose from the center position of the second annular region farthest from the eye point to the center position of the second annular region closest to the eye point.

[0095] "Monotonic displacement toward the nose" refers to, for example, when comparing the center position of any second annular region with the center position of the second annular region immediately inside it, the centers are equal, or the center position of the inner second annular region is displaced toward the nose (specifically, in one direction toward the nose). Alternatively, the equality of the centers may be omitted. While the example described in this paragraph is preferred, it is also acceptable to use the definition that 60% or more of the number of all second annular regions and / or 60% or more of the total area of ​​all second annular regions are monotonically displaced toward the nose. It is preferable to use a value of 70%, 80%, or 90% instead of 60%.

[0096] Furthermore, the displacement (displacement toward the nose) from the center position of any second annular region to the center position of the second annular region immediately inside it may be equal or may increase inward (i.e., monotonically increasing). Alternatively, the requirement that the displacements toward the nose be equal may be omitted. While the example described in this paragraph is preferred, it is also possible to use the requirement that 60% or more of the number of all second annular regions and / or 60% or more of the total area of ​​all second annular regions satisfy the monotonically increasing requirement described in this paragraph. It is preferable to use a value of 70%, 80%, or 90% instead of 60%.

[0097] As a result of the configuration described in the above paragraph, the center of the second annular region closest to the eyepoint may be located on the nasal side of the eyepoint.

[0098] The requirement that the nasal width of each first annular region monotonically decreases outward may be satisfied. For example, when comparing the nasal width of any first annular region with the nasal width of the first annular region immediately outside it, the two widths may be equal, or the nasal width of the outer first annular region may decrease as the first annular region becomes more outward. Alternatively, the requirement that the two widths be equal may be omitted. While the example described in this paragraph is preferred, the requirement that 60% or more of the number of all first annular regions and / or 60% or more of the total area of ​​all first annular regions satisfy the monotonous decrease described in this paragraph may also be used. Preferably, a value of 70%, 80%, or 90% is used instead of 60%.

[0099] Preferred examples relating to far vision and / or side vision will be given below.

[0100] In the first annular region farthest from the eyepoint, the temporal width is greater than the nasal width, and the value of {(temporal width) - (nasal width)} in each first annular region may be equal or may increase (i.e., monotonically increase) outward from the eyepoint. Alternatively, equality may be excluded. Although the example described in this paragraph is preferred, a rule that 60% or more of the number of all first annular regions and / or 60% or more of the total area of ​​all first annular regions satisfies the monotonically increasing rule described in this paragraph may also be used. It is preferable to use a value of 70%, 80%, or 90% instead of 60%.

[0101] With this configuration, the width of the first annular region, which is the clear region, increases with increasing distance from the eyepoint toward the ear. Generally, for a wearer, the farther the position through which the line of sight passes on the eyeglass lens is from the eyepoint toward the ear, the more distant the wearer's vision becomes, away from the frontal view and / or side view. As a result, the more distant the wearer's vision becomes from the frontal view toward the ear, the more easily the wearer's vision passes through the clear region. This allows for comfortable distance and / or side vision. In particular, blurring of objects is reduced when checking traffic lights or the presence (lighting) of other vehicles in the direction of the ear while driving, allowing for better safety confirmation.

[0102] In addition to or instead of the above {(ear side width) - (nose side width)}, the ear side width of each first annular region may be required to monotonically increase outward. For example, when the ear side width of any first annular region is compared with the ear side width of the first annular region immediately outside it, the two widths may be equal, or the ear side width of the outer first annular region may increase the more outward the first annular region is.

[0103] As an example, in a first annular region (one if there is an odd number of first annular regions, and both if there is an even number of first annular regions) located midway between the first annular region farthest from the eyepoint and the first annular region closest to the eyepoint, the width on the ear side may be greater than the width on the nose side.

[0104] The center of the second annular region farthest from the eyepoint may be set to the same position as the eyepoint. This configuration alleviates the sense of incongruity caused by the centers of the second annular regions being different, improving the appearance of the eyeglass lens. Furthermore, by setting the center of the second annular region farthest from the eyepoint as the position of the eyepoint, it becomes easier to grasp the eyepoint during shaping or fitting to the wearer.

[0105] Furthermore, the arrangement of the second annular region group (and thus the first annular region group, central clear region, and outer clear region) is not particularly limited, and can be determined, for example, from the perspective of the visibility of the second annular region group from the outside, the design provided by the second annular region group, the refractive effect of the second annular region group, etc.

[0106] There is no particular limitation on the number of second ring-shaped regions (and therefore first ring-shaped regions) as long as they have the effect of inhibiting the progression of myopia (or the effect of reducing hyperopia).

[0107] The size of each second annular region and each first annular region is not limited to the above preferred example, and may be any size as long as it has the effect of inhibiting the progression of myopia (or the effect of reducing hyperopia).

[0108] On the other hand, in consideration of ease of lathe machining, the width of each second annular region may be equal in all directions in plan view, and all the widths of the second annular regions may be equal.

[0109] With respect to the first group of annular regions, for example, the outer diameter of each first annular region may increase in an arithmetic progression from the inside to the outside.

[0110] Furthermore, the width of each first annular region (clear region) may be larger than the width of each adjacent second annular region, which makes it easier to ensure a good field of vision.

[0111] An example of a specific numerical range for each component is as follows: Ring width of first annular region: 0.5 to 1.5 mm Ring width of second annular region: 0.5 to 1.5 mm Ratio of ring width of second annular region to ring width of first annular region: 1:2 to 2:1 In one aspect of the present invention, this "ring width of the first annular region" also refers to the radial spacing between each of the second annular regions. The above numerical ranges are only valid when the above-mentioned condition 1 or condition 2 is satisfied. Note that, for example, the circumferential spacing between the second refractive regions within each of the second annular regions may be 0 to 1.5 mm, and the value of (circumferential spacing between the second refractive regions within each of the second annular regions) / (diameter of the second refractive region within each of the second annular regions) may be 0 to 2.

[0112] An example of the range of values ​​for the width of the ear side of the first annular region is detailed below.

[0113] Assume a corneal vertex distance of 12 mm and an anterior tilt angle of 0°. The parameters are set as follows: i is a natural number and indicates the order of the first annular region from the side closest to the eyepoint (inner side). The ith first annular region from the inside is the region sandwiched between the ith and (i+1)th second annular regions from the inside. The number of second annular regions is k+1, and the maximum value of i, i.e., the number of first annular regions, is k. The definitions of the symbols are as follows: L [unit: mm]: distance from the pupil to the visual object (set to 200 mm or less in this example); D_i [unit: mm]: distance from the pupil to the center of the ith first annular region from the side closest to the eyepoint (inner side) (the central clear region is treated as number 0); W_i [unit: mm]: width on the nose side of the ith first annular region from the side closest to the eyepoint (inner side) (the central clear region is treated as number 0).

[0114] The apparent width W' of the first annular region during near vision (the width after elongation also discussed in Figures 1A and 1B above) is obtained by the following formula: W'_i = W_i x L / (L - D_i) While the optimal configuration is for most of the first annular regions to have the same "apparent width," it is preferable for the "apparent width" to be equal between the first first annular region, which is closest to the eyepoint and the kth first annular region, which is the outermost, where differences in "apparent width" are most likely to occur. Taking this into consideration, it is preferable to satisfy the following formula: W_1 x L / (L - D_1) = W_k x L / (L - D_k) Rearranging this formula, the following formula shows the preferable condition for the width of the first annular region: W_k / W_1 = (L - D_k) / (L - D_1) In other words, it is preferable for the left and right sides of the above formula to be equal.

[0115] Even if the "apparent widths" are not completely equal as described above, it can be considered to be sufficiently effective as long as the difference in "apparent width" is halved as shown below. When the first ring-shaped regions are arranged with equal widths as described in Patent Document 1, the apparent region width differs by the following amount: W'_k / W'_1=(L-D_1) / (L-D_k) If the value corresponds to the square root of the right-hand side of this equation, it can be considered that the difference in apparent region width is halved or less. Taking this into consideration, it is preferable to satisfy the following equation: ((L-D_1) / (L-D_k)) －１／２ <W'_k / W'_1<((LD_1) / (LD_k)) １／２ The lower limit value in the above equation takes into consideration the tolerance for over-correcting the original difference. More specifically, if over-correction occurs such that W_k / W_1 falls below 1, it is acceptable if W'_1 / W'_k is smaller than the value equivalent to the square root. Applying the above equation to the aforementioned preferred condition yields the following condition: ((L-D_k) / (L-D_1)) ３／２ <W_k / W_1<((LD_k) / (LD_1)) １／２

[0116] A second annular region farthest from the eye point may be disposed outside the first annular region farthest from the eye point, and an outer clear region, which is a first refractive region, may be disposed outside the second annular region farthest from the eye point. The outer clear region is a region in which the second annular region (defocus region) is not formed, similar to the central clear region.

[0117] <Other specific examples of eyeglass lenses> The lens substrate is formed from a thermosetting resin material such as thiourethane, allyl, acrylic, or epithio. Note that other resin materials that provide the desired refractive index may be selected as the resin material constituting the lens substrate. Furthermore, the lens substrate may be made of inorganic glass instead of a resin material.

[0118] 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.

[0119] The anti-reflection film is, for example, ZrO ２ , MgF ２ , Al ２ O ３ The anti-reflection coating is formed by vacuum deposition of an anti-reflection agent such as the above. By coating with such an anti-reflection coating, the visibility of images passing through the eyeglass lens can be improved.

[0120] As described above, 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.

[0121] In manufacturing eyeglass lenses, a lens substrate is first molded by a known molding method such as cast polymerization. For example, a lens substrate having a defocus region on at least one surface is obtained by molding using a mold having a molding surface with multiple recesses by cast polymerization. After obtaining the lens substrate, 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 or by using spin coating, etc. After the hard coat film is formed, an antireflection film is then formed on the surface of the hard coat film. The antireflection film can be formed by vacuum deposition of the raw materials for the film. This manufacturing process with the above procedure results in an eyeglass lens having multiple defocus regions protruding toward the object side on the object-side surface.

[0122] 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.

[0123] 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.

[0124] <Eyeglasses> The technical concept of the present invention is also reflected in eyeglasses in which the vicinity of the periphery of the above-mentioned eyeglass lenses is cut based on a predetermined frame shape and the eyeglasses are fitted into an eyeglass frame. There are no limitations on the type or shape of the eyeglass frame, and it may be full-rim, half-rim, under-rim, or rimless.

[0125] Although the spectacle lenses described so far have been assumed to be uncut lenses before edging, the technical concept of the present invention can also be applied to lenses after edging, as described in the above paragraph. However, edging may result in at least a portion of the outermost (or, in some cases, even further inside) second annular region being cut. In this case, the outermost second annular region in the lens after edging refers to the second annular region that has not been cut at all. In the lens after edging, the region between the second annular region that has not been cut at all and the periphery of the spectacle lens, other than the second annular region that has been cut at all, is referred to as the outer clear region.

[0126] <Others> The technical scope of the present invention is not limited to the above-described embodiments, but also includes various modifications and improvements within the scope of the specific effects that can be obtained by the constituent elements of the invention and their combinations.

[0127] Fig. 4 is a front view showing a spectacle lens according to a further specific embodiment of the present invention, in which only the first, third, and fifth second ring-shaped regions, counting from the inside, are displaced to the left (toward the nose). In Fig. 4, the segments are not shown.

[0128] Incidentally, it is not precluded from disposing second refractive regions as segments between the adjacent inner and outer rings as shown in Fig. 15 of Patent Document 4. In other words, it is not precluded from arranging the second refractive regions in the radial direction as well.

[0129] The technical concept of the present invention is also reflected in a method for designing a spectacle lens having a second ring-shaped region as described above on at least one of the object-side surface and the eyeball-side surface to realize a spectacle lens according to one aspect of the present invention. The technical concept of the present invention is also reflected in a method for manufacturing a spectacle lens, in which a lens substrate is processed to realize the surface designed by this design method.

[0130] The present invention will be specifically explained below using examples, but the present invention is not limited to the following examples.

[0131] <Comparative Example 1> The following spectacle lens for the left eye was produced. The spectacle lens consisted of only a lens substrate, with no other material being laminated onto the lens substrate. The prescribed refractive power was S (spherical refractive power) of 0.00 D and C (astigmatic refractive power) of 0.00 D. In the spectacle lens, which was an uncut lens, the eye point was aligned with the geometric center. The coordinates in the tables below are those when the eye point was positioned at the origin. - Diameter of lens substrate in plan view: 60.00 mm - Type of lens substrate: PC (polycarbonate) - Refractive index of lens substrate: 1.589 - Surface on which second annular region is formed: Object-side surface - Shape of second refractive regions (segments) within second annular region in plan view: Perfect circle - Alignment pattern of second refractive regions (segments) within second annular region in plan view: Circumferentially linked (zero separation distance) - Diameter of second refractive regions (segments) within second annular region: 1.10 mm - Shape of second annular region in plan view: Perfect ring - Defocus power of second refractive regions (segments) in second annular region: 3.50 D - Range of central clear region: Circular region with a radius of 3.00 mm from eye point EP An outer clear region was provided outside the outermost second annular region. The table below numbers the second annular regions, with the side closest to the eyepoint numbered 1 and the outer side numbered 2, and summarizes the coordinates and spacing (distance) (in mm) of the second annular regions for each number.

[0132] FIG. 5 is a schematic explanatory diagram showing the segments of the second ring-shaped region in black in a front view of the eyeglass lens according to Comparative Example 1.

[0133] Example 1 The eyeglass lenses according to the following table were manufactured. The rest of the procedure was the same as in Comparative Example 1.

[0134] FIG. 6 is a schematic explanatory diagram showing the segments of the second ring-shaped region in black in a front view of the eyeglass lens according to Example 1, and the right-hand view is a partially enlarged view of the left-hand view.

[0135] Compared to Comparative Example 1, Example 1 allows the second annular regions to be densely arranged on the nose side of the spectacle lens, through which the line of sight passes, so that the second annular regions can fully exert their refractive effect during near vision. Specifically, the apparent spacing between the second annular regions can be made constant on the nose side (-x direction). As a result, compared to Comparative Example 1, Example 1 can suppress a decrease in the refractive effect of the second annular regions during near vision. Furthermore, since the relationship between the radial spacing between each second annular region and the circumferential spacing between each segment within each ring is constant, wearing comfort can be maintained. Furthermore, because the lens employs a ring-shaped configuration (a Fresnel lens concept) despite being a DIMS lens, the difficulty of processing and measuring the lens is reduced.

[0136] REFERENCE SIGNS LIST 1: eyeglass lens 2: central clear area 3a: first annular area group 3b: second annular area group 4: outer clear area EP: eye point C: center of second annular area a: first refractive area b: second refractive area

Claims

1. A spectacle lens comprising a first refractive region having a first refractive power that realizes a prescribed refractive power for a wearer, and a second refractive region having a second refractive power different from the first refractive power, wherein at least a part of the second refractive region and a plurality of second refractive regions are arranged side by side in a ring on the object side surface or the eyeball side surface, the ring comprises an inner ring and an outer ring surrounding the inner ring, the position of the center of the inner ring is different from the position of the center of the outer ring when the spectacle lens is viewed in a plane, and the spectacle lens satisfies any one of the following conditions: <Condition 1> The radial distance between each ring is wider than the circumferential distance between the second refractive regions within each ring. <Condition 2> The radial distance between each ring is narrower than the circumferential distance between the second refractive regions within each ring.

2. The eyeglass lens according to claim 1, wherein at least a portion of the ring is formed by a plurality of second refractive regions connected in a daisy chain.

3. A spectacle lens having an effect of inhibiting the progression of myopia, wherein the second refractive region is a protruding portion as viewed from the first refractive region.

4. A pair of glasses comprising the eyeglass lens according to claim 1 or 2 and an eyeglass frame.

Images