Spectacle lens and design method thereof

Abstract

An object of the present invention is to prevent the progression of myopia or hyperopia from being lost even in the peripheral area of ​​a spectacle lens. A spectacle lens and related technologies are provided, the spectacle lens comprising: a first region configured to cause light incident on the object side of the lens to exit from the side of the eyeball of the lens and converge at a predetermined position A on the wearer's retina; and a plurality of second regions configured to cause the light to converge at a position B on the object side or at a position C on the far side relative to position A. In the peripheral area of ​​the spectacle lens, the first region is within a radius of 4.5 mm to 25 mm from the center of the lens. If the second region causes the light to converge at position B, the meridional and sagittal diopter errors have values ​​such that the light converges in a direction extending from the vicinity of position A toward position B. Alternatively, if the second region causes the light to converge at position C, the meridional and sagittal diopter errors have values ​​such that the light converges in a direction extending from the vicinity of position A toward position C.

Description

[0001] This application is a divisional application of the patent application with application number 202080008259.4, application date June 18, 2020, and invention name “Spectacle lenses and design methods thereof”. Technical Field

[0002] The present disclosure relates to a spectacle lens and a design method thereof, and particularly to a spectacle lens for inhibiting the progression of myopia or hyperopia and a design method thereof. Background Art

[0003] In a spectacle lens, parallel light rays incident on the object-side surface of the lens typically exit from the eyeball-side surface of the lens and focus on the wearer's retina (in this specification, at a predetermined position A). That is, parallel light rays from a portion of the spectacle lens having a shape corresponding to the prescription power focus on the retina. This position A will be referred to as focal position A.

[0004] Reference List

[0005] Patent Literature

[0006] US 2017 / 131567A is an example of related art.

[0007] Astigmatism and power errors occur at a portion of a spectacle lens that is distant from the optical center (or centroid) (hereinafter also collectively referred to as the "lens center"). The occurrence of astigmatism and power errors means the occurrence of a refractive error relative to the prescribed power. This refractive error is expressed as (transmission power - prescription power). Therefore, in this specification, refractive error refers to transmission power error unless otherwise specified. Furthermore, the occurrence of astigmatism and power errors means the occurrence of refractive error in the meridian direction and refractive error in the sagittal direction, which serve as the basis for the refractive error. Summary of the Invention

[0008] A first mode of the present disclosure is a spectacle lens comprising:

[0009] a first region that causes light incident on the object-side surface of the lens to exit from the eyeball-side surface of the lens and converge at a predetermined position A on the wearer's retina; and

[0010] a plurality of second regions configured to converge the light at a position B on the object side or a position C on the far side relative to the position A,

[0011] Wherein, in a first area in the peripheral area of ​​the spectacle lens, the peripheral area is a radius range of 4.5 mm to 25 mm from the center of the lens, and if the second area causes the light to converge at position B, the refractive power error in the meridian direction and the refractive power error in the sagittal direction have values ​​that cause the light to converge in a direction extending from near position A toward position B, or if the second area causes the light to converge at position C, have values ​​that cause the light to converge in a direction extending from near position A toward position C.

[0012] The second mode of the present disclosure is the mode described as the first mode, wherein

[0013] The second region is a raised region, and

[0014] In the first area in the peripheral area, both the refractive power error in the meridian direction and the refractive power error in the sagittal direction are -0.25 D or more.

[0015] The third mode of the present disclosure is a mode described as the first mode or the second mode, wherein

[0016] The second region is a raised region, and

[0017] The refractive power error in the meridian direction or the refractive power error in the sagittal direction is -0.12 D or more and +0.12 D or less, and is lower than the value of the other refractive power error.

[0018] The fourth mode of the present disclosure is a mode described as any one of the first to third modes, wherein

[0019] The refractive power error in the meridian direction or the refractive power error in the sagittal direction has a value obtained by performing ray tracing at a finite distance.

[0020] A fifth mode of the present disclosure is a method for designing a spectacle lens, the spectacle lens comprising:

[0021] a first area that causes light incident on the object-side surface of the lens to exit from the eyeball-side surface of the lens and converge at a predetermined position A on the wearer's retina; and a plurality of second areas configured to cause the light to converge at a position B on the object side or a position C on the far side relative to position A,

[0022] The method includes:

[0023] In a first area among the peripheral areas of the spectacle lens, the peripheral area being a radius range of 4.5 mm to 25 mm from the center of the lens, the refractive power error in the meridian direction and the refractive power error in the sagittal direction are set to values ​​such that the light converges in a direction extending from near position A toward position B if the second area converges the light at position B, or to values ​​such that the light converges in a direction extending from near position A toward position C if the second area converges the light at position C.

[0024] The sixth mode of the present disclosure is the mode described as the fifth mode, wherein

[0025] The second region is a raised region, and

[0026] In the first area in the peripheral area, both the refractive power error in the meridian direction and the refractive power error in the sagittal direction are -0.25 D or more. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1A : is a graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Comparative Example 1 described later.

[0028] Figure 1B This is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridional direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base portion) of the eyeglass lens in Comparative Example 1 described later.

[0029] Figure 2 is a front view showing the shape of a spectacle lens according to a mode of the present invention.

[0030] Figure 3 It shows Figure 2 A cross-sectional view of an example configuration of an eyeglass lens is shown in FIG.

[0031] Figure 4 is a schematic cross-sectional view (part 1) showing a Figure 2 The light path of eyeglass lenses is shown.

[0032] Figure 5 is a schematic cross-sectional view (part 2) showing a Figure 2 The light path of eyeglass lenses is shown.

[0033] Figure 6AGraph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Example 1.

[0034] Figure 6B It is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 1.

[0035] Figure 7A Graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Example 2.

[0036] Figure 7B It is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 2.

[0037] Figure 8A Graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Example 3.

[0038] Figure 8B It is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 3.

[0039] Figure 9A Graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Example 4.

[0040] Figure 9B It is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 4.

[0041] Figure 10A Graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Example 5.

[0042] Figure 10BIt is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 5.

[0043] Figure 11A Graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Example 6.

[0044] Figure 11B It is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 6.

[0045] Figure 12A Graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Example 7.

[0046] Figure 12B It is a graph showing the relationship between the distance from the center of the lens (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 7.

[0047] Figure 13A Graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Example 8.

[0048] Figure 13B It is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 8. DETAILED DESCRIPTION

[0049] Patent Document 1 (US Patent Application Publication No. 2017 / 131567) describes a spectacle lens that exhibits an effect of suppressing the progression of refractive errors such as myopia (hereinafter, also referred to as an effect of suppressing the progression of myopia). This spectacle lens is also referred to as a lens that suppresses the progression of myopia. Specifically, for example, micro-convex portions, each of which has a spherical shape with a diameter of approximately 1 mm, are formed on a convex surface, which is the surface on the object side of the spectacle lens.

[0050] In a spectacle lens, generally, parallel light rays incident on the object side of the lens are emitted from the eyeball side of the lens and focused on the wearer's retina (in this specification, at a predetermined position A). That is, parallel light rays from a portion of the spectacle lens having a shape corresponding to the prescription power (for example, a portion of the spectacle lens described in Patent Document 1) are focused on the retina. This position A will be referred to as focal position A. At the same time, for light that has passed through the micro-convex portion of the spectacle lens described in Patent Document 1, the light rays incident on the spectacle lens are focused at a plurality of positions B on the object side relative to the predetermined position A in the optical axis direction. These positions B will be referred to as focal positions B. The defocus imparted by the micro-convex portion suppresses the progression of myopia.

[0051] In this specification, on the object side refers to the side on the optical axis in the direction of the object to be visually identified ("forward direction"), and on the far side refers to the side opposite to the object side: that is, the side on the optical axis in the direction away from the object ("backward direction", or the direction from the eyeglass lens toward the eyeball).

[0052] The spectacle lens described in Patent Document 1 is provided with a micro-convex portion to suppress the progression of myopia, and light rays are focused at a plurality of positions B on the object side relative to a position A on the retina, as described in the background art (see Figure 5 , which will be described later).

[0053] However, a meridional error and a sagittal error occur in the portion away from the center of the lens. Studies by the inventors of the present application have revealed that these errors may cause light to be focused at position C in the opposite direction relative to position B, that is, at the far side (backward) relative to position A on the retina.

[0054] That the light is focused at a position C located in the opposite direction in the region in which the prescription power is intended to be achieved means that the effect of suppressing the progression of myopia exhibited by the micro-convex portions is affected.

[0055] It should be noted that Patent Document 1 states that the micro-convex portions exhibit an effect of suppressing the progression of myopia. However, by replacing the micro-convex portions with micro-concave portions, an effect of suppressing the progression of hyperopia is expected to be exhibited due to a mechanism that is opposite to the myopia progression mechanism and the mechanism of suppressing myopia described in Patent Document 1. However, if micro-concave portions are also provided, there is a concern that failure may occur in portions away from the center of the lens, and the effect of suppressing the progression of hyperopia exhibited by the micro-concave portions may be affected.

[0056] The embodiments of the present disclosure are intended to not impair the effect of suppressing the progression of myopia or hyperopia even in the peripheral area of ​​a spectacle lens.

[0057] The inventors of the present application conducted intensive research to solve the above-mentioned problems. The inventors of the present application first focused on a situation in which light rays focus at a position C located on the opposite side relative to position B at a portion away from the center of the lens, that is, focus at position C located far away from position A on the retina.

[0058] Figure 1A : is a graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Comparative Example 1 described later.

[0059] Figure 1B It is a graph showing the relationship between the distance from the center of the lens (horizontal axis), and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Comparative Example 1 described later.

[0060] Note that the meridian direction refers to the direction, i.e., the radial direction extending radially from the lens center, and the sagittal direction refers to the direction perpendicular to the meridian direction. Symbol p represents the distance from the optical axis in the surface on the object side (convex surface; outer surface).

[0061] In the spectacle lens of this example, the refractive power error in the meridian direction increases in the negative direction in the peripheral area of ​​the spectacle lens, which is a radius range of 4.5 mm to 25 mm from the center of the lens, as shown in FIG. Figure 1B An increase in the refractive error in the negative direction means that the focal position moves toward the far side, that is, in the backward direction.

[0062] That is, the inventors of the present application discovered that there is a problem in that "the focal position moves in the backward direction" in the area where the prescription power is achieved on the side away from the center of the lens (the first area in this specification), and this movement may deteriorate the suppression of the progression of myopia.

[0063] As a measure to this problem, refractive error and astigmatism are in a trade-off relationship (for example, JP 2012-233959A, paragraphs 0028 and 0029). However, when designing the surface shape of a spectacle lens, if astigmatism is allowed to increase to a certain extent, refractive error can be controlled.

[0064] Based on the above findings, the inventors of the present application have conceived a configuration in which, in a case where the intention is to suppress the progression of myopia, for example, even if a refractive power error occurs, in a peripheral area of ​​the spectacle lens having a radius ranging from 4.5 mm to 25 mm from the center of the lens, the refractive power error is set to a value that does not excessively shift the focal position in the rearward direction.

[0065] The present disclosure is made based on the above findings.

[0066] According to the embodiments of the present disclosure, even in the peripheral area of ​​the eyeglass lens, the effect of suppressing the progression of myopia or hyperopia may not be impaired.

[0067] Modes of the present disclosure will be described below. The following description is an example, and the present disclosure is not limited to the modes described as examples.

[0068] Spectacle lenses according to a mode of the present disclosure

[0069] The spectacle lens according to the mode of the present disclosure is a lens that suppresses the progression of myopia. The general features of the lens can be similar to those of the spectacle lens described in Patent Document 1. The specific configuration is as follows.

[0070] “A spectacle lens comprising:

[0071] a first region that causes light incident on the object side of the lens to exit from the eyeball side of the lens and converge at a predetermined position A on the wearer's retina; and

[0072] a plurality of second regions configured to converge the light at a position B on the object side relative to the position A,

[0073] In a first area of ​​the peripheral area of ​​the spectacle lens, the peripheral area being a radius range of 4.5 mm to 25 mm from the center of the lens, the refractive error in the meridian direction and the refractive error in the sagittal direction have values ​​such that light rays converge in a direction extending from near position A toward position B.

[0074] The first region generally corresponds to the first refractive area described in Patent Document 1, for example. The "light rays incident from the surface on the object side" in the above-mentioned specific configuration are rays originating from a point at infinity. The second region generally corresponds to the second refractive area described in Patent Document 1, for example. That is, in this mode, the second region is a convex region.

[0075] In the mode of the present disclosure, even if a refractive power error occurs in a peripheral area of ​​the eyeglass lens having a radius ranging from 4.5 mm to 25 mm from the center of the lens (hereinafter, also referred to simply as the "peripheral area"), the refractive power error in the meridian direction and the refractive power error in the sagittal direction have values ​​such that light rays converge in a direction extending from near a predetermined position A toward position B.

[0076] Note that the reason for using the wording "near" the predetermined position A, that is, the reason for allowing a region slightly located on the far side (in the rearward direction) relative to the predetermined position A, is as follows.

[0077] The first area in the peripheral region is a portion having a shape that achieves the prescribed power. To this end, light rays preferably converge at a predetermined position A on the retina. However, under predetermined conditions, the refractive error is zero, and if this condition is slightly violated, a small refractive error may occur. Furthermore, in actual design, aiming for a precisely zero refractive error is unrealistic, and the refractive error is typically intended to be within a predetermined range. To this end, it is reasonable to allow for a certain degree of refractive error in the peripheral region.

[0078] In the mode of the present disclosure, one of the notable features is that, even if a refractive power error is allowed, the first region in the peripheral region is designed so that the effect of suppressing the progression of myopia is not deteriorated.

[0079] If the diopter value deviates from the prescribed diopter value, that is, if there is an error in the diopter value in the first zone of the peripheral area, it is considered to promote or inhibit eye growth. The degree of promotion or inhibition is considered to be proportional to the diopter value. Therefore, if only a small amount of diopter error remains, it can be said that its effect on inhibiting myopia progression is minimal.

[0080] Regarding the allowable "slight movement of the focal position", for example, it can be considered that the refractive power error in the meridian direction and the refractive power error in the sagittal direction are both -0.25D (diopter) or greater (preferably, -0.12D or greater, or more preferably 0D or greater).

[0081] By adopting the above configuration, even at a portion far from the optical center or the geometric center serving as the lens center, light can be suppressed from focusing on position C located in the opposite direction relative to position B, that is, on the far side near position A on the retina.

[0082] As a result, according to the mode of the present disclosure, even in the peripheral area of ​​the spectacle lens, the effect of suppressing the progression of myopia or hyperopia is not affected.

[0083] Details of the spectacle lens according to the mode of the present disclosure

[0084] Hereinafter, descriptions will be given of more specific examples, possibly desirable examples, and modifications of modes of the present disclosure.

[0085] like Figure 6B As shown, according to Embodiment 1 described later, it may be desirable that the refractive power error in the meridian direction or the refractive power error in the sagittal direction is -0.12D or more and +0.12D or less, and is lower than the value of the other refractive power error.

[0086] exist Figure 6BIn the example shown, the diopter error in the meridian direction is set to -0.12D or greater and +0.12D or less (more specifically, 0D or greater). That is, even in the peripheral area of ​​the spectacle lens, the diopter error is substantially zero, i.e., the prescribed power is achieved in the meridian direction. In this case, the wearer can obtain a clearer field of vision than in a case where the diopter error in the meridian direction and the diopter error in the sagittal direction take values ​​deviating from zero.

[0087] In addition, if Figure 6B As shown, by setting the refractive power error in the sagittal direction to be greater than the refractive power error in the meridian direction set as described in the previous paragraph in the peripheral area, light can be converged in a direction toward position B relative to the predetermined position A.

[0088] That is, compared with conventional spectacle lenses, the spectacle lenses of this mode according to the present disclosure allow the wearer to benefit from the effect of suppressing the progression of myopia while also having a clear field of vision.

[0089] It may also be desirable that the refractive power error in the meridian direction and the refractive power error in the sagittal direction have values ​​obtained by performing ray tracing at a finite distance.

[0090] If a person in whom the myopia suppression effect is to be demonstrated is in a visual environment in which the person works for a long time and the eyes are close to something, the person has already shown signs of myopia in many cases. For this purpose, the spectacle lens according to the mode of the present disclosure is a single-focus lens for processing object distances ranging from medium distances (1 meter to 40 centimeters) to short distances (40 centimeters to 10 centimeters). That is, the first area of ​​the spectacle lens according to the mode of the present disclosure shows the function of the single-focus lens. Needless to say, the technical idea of ​​the present disclosure is also applicable to single-focus lenses that process infinity points, but a single-focus lens for processing medium to short distances will be used as an example of the mode of the present disclosure.

[0091] The spectacle lenses according to the present disclosure are typically single-vision lenses for handling medium to short distances. For this purpose, when setting the meridional or sagittal diopter error, if the diopter error is set to a value obtained by performing ray tracing at a finite distance, a spectacle lens more suitable for actual conditions can ultimately be obtained. The "finite distance" here refers to an object distance set to the aforementioned medium or short distance, or preferably, the object distance of a single-vision lens.

[0092] Although the peripheral area of ​​the spectacle lens is expressed as a distance from the lens center in the present disclosure, it can also be expressed as the rotation angle of the eyeball (in other words, the visual angle). In this case, a radius range of 4.5 mm to 25 mm from the lens center generally corresponds to a rotation angle of 10 degrees to 45 degrees. The rotation angle is described in, for example, the specification of Japanese Patent Application Laid-Open No. 1992-338918, and its description is omitted.

[0093] A more specific configuration of the spectacle lens according to the mode of the present disclosure will be described below.

[0094] The overall structure of eyeglass lenses

[0095] Figure 2 2 is a front view showing the shape of a spectacle lens according to a mode of the present disclosure.

[0096] like Figure 2 As shown, the spectacle lens 1 has a plurality of raised areas 6 regularly arranged around the center of the lens. These raised areas 6 are the second area. The portion other than the raised areas 6 and serving as the base is the first area. The specific configuration of the raised areas 6 will be described in detail later.

[0097] Figure 3 It shows Figure 2 A cross-sectional view of an example configuration of an eyeglass lens is shown in FIG.

[0098] like Figure 3 As shown, the spectacle lens 1 has an object-side surface 3 and an eyeball-side surface 4. The "object-side surface" is the surface that faces the object when the wearer wears the glasses including the spectacle lens 1. The "eyeball-side surface" is the opposite surface, that is, the surface that faces the eyeball when the wearer wears the glasses including the spectacle lens 1. In this embodiment, the object-side surface 3 is convex, while the eyeball-side surface 4 is concave. In other words, the spectacle lens 1 according to this embodiment is a meniscus lens.

[0099] The spectacle lens 1 includes: a lens substrate 2; hard coating layers 8 formed on the convex and concave sides of the lens substrate 2; and antireflection coating layers (AR coating layers) 10 formed on the surfaces of the respective hard coating layers 8. It should be noted that, in addition to the hard coating layer 8 and the antireflection coating layer 10, other coating layers may also be formed on the spectacle lens 1.

[0100] lens substrate

[0101] The lens substrate 2 is made of, for example, a thermosetting resin material such as thiourea, allyl, acryl, or episulfide. It should be noted that any other resin material that can achieve a desired refractive index can be selected as the resin material constituting the lens substrate 2. Furthermore, a lens substrate made of inorganic glass can be used instead of the resin material.

[0102] In this embodiment, the object-side surface 3 (convex surface) of the lens substrate 2 is provided with a plurality of raised areas 6a formed so as to protrude from the surface toward the object side. Each of the raised areas 6a is formed by a curved surface having a different curvature from that of the object-side surface 3 of the lens substrate 2.

[0103] Due to the formation of these raised areas 6a, when viewed in plan, on the object-side surface 3 of the lens substrate 2, the raised areas 6a are arranged as islands with equal spacing therebetween around the center of the lens, each of which has a generally circular shape. In other words, the raised areas 6a are arranged spaced apart from each other without being adjacent to each other, that is, with the first area serving as the base present between the raised areas 6a, each of which has a generally circular shape.

[0104] It should be noted that the plurality of raised regions 6a may alternatively be formed on the surface 4 (concave surface) on the eyeball side of the lens substrate 2. Furthermore, the plurality of raised regions 6a may be formed on both surfaces, namely, the convex surface and the concave surface. For ease of description, the following describes a case where the plurality of raised regions 6a are formed on the surface 3 (convex surface) on the object side as an example.

[0105] Hard coating

[0106] For example, a thermoplastic resin or UV curable resin is used to form the hard coating layer 8. The hard coating layer 8 can be formed by dipping the lens substrate 2 into a hard coating agent or by spin coating, etc. The hard coating layer 8 can improve the durability of the eyeglass lens 1.

[0107] Anti-reflective coating

[0108] The antireflection coating 10 is formed by forming a film of an antireflection agent such as ZrO2, MgF2 or Al2O3 by vacuum evaporation, for example.

[0109] The shape of the surface on the object side

[0110] As described above, a plurality of raised areas 6a are formed on the face 3 on the object side of the lens substrate 2. Therefore, if this face 3 is coated with the hard coating 8 and the anti-reflection coating 10, then following the raised areas 6a on the lens substrate 2, a plurality of raised areas 6b are also formed with the hard coating 8 and the anti-reflection coating 10. That is, each of the raised areas 6, consisting of the raised areas 6a and the raised areas 6b, is arranged on the face 3 (convex surface) on the object side of the spectacle lens 1 so as to protrude from the face 3 toward the object.

[0111] Similar to the raised area 6a, the raised area 6 formed subsequent to the raised area 6a on the lens substrate 2 is arranged as island portions with equal gaps in the circumferential direction and radial direction around the lens center, that is, in a state of being regularly arranged around the lens center.

[0112] In another mode of the present disclosure, the raised region 6 may be formed of at least the hard coating layer 8 or the anti-reflection coating layer 10 , rather than being formed by providing the raised region 6 a on the lens substrate 2 .

[0113] It should be noted that the raised area 6 may be provided at a portion where the optical axis at the center of the lens passes through, as in the present application. Figure 2 As shown, or the area where the convex area 6 is not provided can be fixed to the portion where the optical axis passes. For reference, FIG. 1 of Patent Document 1 shows an example of fixing the area where the convex area is not provided at the portion where the optical axis passes.

[0114] For example, each of the raised areas 6 is configured as follows. It may be desirable for the diameter of each raised area 6 to be approximately 0.8 mm to 2.0 mm. It may be desirable for the protrusion height (protrusion amount) of each raised area 6 to be approximately 0.1 μm to 10 μm, or even approximately 0.7 μm to 0.9 μm. Each raised area 6 has a spherical shape with a radius of curvature of 50 mm to 250 mm, or even approximately 86 mm. Due to this configuration, the diopter of each raised area 6 is approximately 2.00 D to 5.00 D higher than the diopter of the area in which the raised areas 6 are not formed.

[0115] Optical properties

[0116] The spectacle lens 1 having the above-described configuration can achieve the following optical characteristics due to the convex area 6 on the object-side surface 3 , and thus can suppress the progression of ametropia (such as myopia) of the spectacle wearer.

[0117] Figure 4 is a schematic cross-sectional view (part 1) showing a Figure 2 The light path of eyeglass lenses is shown.

[0118] like Figure 4As shown, light incident on the area of ​​the object-side surface 3 of the spectacle lens 1 where the raised area 6 is not formed (i.e., the first area serving as the base) is emitted from the eyeball side surface 4 and then focused on the retina 20a of the eyeball 20. In other words, light passing through the spectacle lens 1 is focused on the retina 20a of the spectacle wearer in principle. In other words, the first area serving as the base of the spectacle lens 1 has a curvature set according to the spectacle wearer's prescription, so that light is focused at a predetermined position A on the retina 20a.

[0119] Figure 5 is a schematic cross-sectional view (part 2) showing a Figure 2 The light path of eyeglass lenses is shown.

[0120] At the same time, if Figure 5 As shown, light incident on the convex area 6 of the spectacle lens 1 is emitted from the side surface 4 of the eyeball and then focused at a position B on the object side relative to the retina 20a of the eyeball 20. That is, the convex area 6 causes the light emitted from the surface 4 on the eyeball side to converge at a position B on the object side relative to the focal position A. These focal positions B are represented by positions B1, B2, B3, ..., B corresponding to the respective convex areas 6. N (N is the total number of raised areas 6).

[0121] Therefore, in principle, the spectacle lens 1 causes light incident on the object side 3 to exit from the eyeball side 4 and converge at a predetermined position A. At the same time, in the portion where the convex area 6 is arranged, the spectacle lens 1 causes light to converge at positions B (B1, B2, B3 . . . B4) located on the object side relative to the predetermined position A. N ). That is, in addition to converging light to achieve the prescription of the eyeglass wearer, the eyeglass lens 1 is also configured to converge light at position B on the object side. Due to such optical characteristics, the eyeglass lens 1 exhibits an effect of suppressing the progression of myopia.

[0122] Method for designing spectacle lenses according to the present invention

[0123] The technical concept of the present disclosure is also applicable to a method for designing eyeglass lenses, which is constructed as follows.

[0124] "A method for designing a spectacle lens, the spectacle lens comprising:

[0125] a first region that causes light incident on the object side of the lens to exit from the eyeball side of the lens and converge at a predetermined position A on the wearer's retina; and

[0126] a plurality of second regions configured to converge the light at a position B on the object side relative to the position A,

[0127] The method includes:

[0128] In a first area of ​​the peripheral area of ​​the spectacle lens, which is a radius range of 4.5 mm to 25 mm from the center of the lens, the refractive power error in the meridian direction and the refractive power error in the sagittal direction are set to values ​​that converge light in a direction extending from near position A toward position B.

[0129] It may be desirable to apply the method for designing a spectacle lens according to the mode of the present disclosure to the same examples as the spectacle lenses already described, and accordingly, the description thereof will be omitted.

[0130] Method for manufacturing a spectacle lens

[0131] The technical idea of ​​the present disclosure is also applicable to a method for manufacturing a spectacle lens, which adopts the above-described method for designing a spectacle lens. A specific example of the method for manufacturing the spectacle lens 1 will be described.

[0132] To manufacture the spectacle lens 1, first, the lens substrate 2 is molded using a known molding method such as cast polymerization. For example, by molding using cast polymerization using a mold having a molding surface provided with a plurality of concave portions, the lens substrate 2 having the raised areas 6 on at least one of its surfaces is obtained.

[0133] After obtaining the lens substrate 2, next, a hard coating layer 8 is formed on the surface of the lens substrate 2. The hard coating layer 8 can be formed by dipping the lens substrate 2 in a hard coating agent or by spin coating or the like.

[0134] After forming the hard coating layer 8, the antireflection coating layer 10 is then formed on the surface of the hard coating layer 8. The hard coating layer 8 can be formed by depositing an antireflection agent by vacuum evaporation.

[0135] The spectacle lens 1 having the plurality of raised areas 6 protruding toward the object on the surface 3 on the object side is obtained by the manufacturing method having the above-described steps.

[0136] In cases where the effect of inhibiting the development of hyperopia is shown

[0137] By replacing the convex area with the concave area and also replacing the position B on the object side with the position C on the far side of the spectacle lens, as well as the method for designing the spectacle lens described so far, an effect of suppressing the progression of hyperopia is exhibited.

[0138] The pattern of the effect of suppressing the progression of hyperopia is shown as follows.

[0139] “A spectacle lens comprising:

[0140] a first region that causes light incident on the object side of the lens to exit from the eyeball side of the lens and converge at a predetermined position A on the wearer's retina; and

[0141] a plurality of second regions configured to converge the light at a position C on the far side relative to the position A,

[0142] In a first area of ​​the peripheral area of ​​the spectacle lens, the peripheral area being a radius range of 4.5 mm to 25 mm from the center of the lens, the refractive error in the meridian direction and the refractive error in the sagittal direction have values ​​such that light rays converge in a direction extending from near position A toward position C.

[0143] In the case of a mode showing the effect of suppressing the progression of hyperopia, it may be desirable to implement the following example.

[0144] "The second area is the recessed area, and

[0145] In the first zone in the peripheral zone, both the refractive power error in the meridian direction and the refractive power error in the sagittal direction are +0.25D or less. ”

[0146] “The refractive power error in the meridian direction or the refractive power error in the sagittal direction (e.g., the refractive power error in the meridian direction) is -0.12 D or more and +0.12 D or less, and is higher than the value of the other refractive power error (e.g., the refractive power error in the sagittal direction).”

[0147] It should be noted that the concave region is actually a region formed by a concave portion. The concave region can have a micro-convex portion (e.g., as described above with reference to Figure 2 and Figure 3 The convex shape of the convex region 6) is concave toward the opposite side. Other shapes, arrangements, etc. can be provided by replacing "convex" with "concave" in the above-mentioned "lens substrate," "shape of the object-side surface," and "optical characteristics."

[0148] Example

[0149] Next, examples will be described to specifically illustrate the contents of the present disclosure. Needless to say, the present disclosure is not limited to the following examples.

[0150] Example 1

[0151] The following spectacle lenses were designed. It should be noted that all the spectacle lenses in the embodiments have a first region serving as a base and a second region serving as a raised region. Configuration overview is as follows Figure 2 shown.

[0152] S:-1.00D

[0153] C:0.00D

[0154] Base surface: 1.0D

[0155] n=1.589

[0156] The outer face, ie the face on the object side, is set to be spherical.

[0157] The inner surface, ie, the surface on the eyeball side, is set to be aspherical.

[0158] The object distance is set to infinity.

[0159] Surface curvature radius: r1 = 589.00 mm

[0160] Inner curvature radius: r2 = 294.407 mm

[0161] Center thickness: 1.0mm

[0162] Eyeball rotation center position: 24 mm from the inner vertex

[0163] Raised area shape: spherical

[0164] Design goal: The refractive error in the meridian direction (meridian: M) is set to essentially zero. The refractive error in the sagittal direction (sagittal: S) is set to a positive value.

[0165] It should be noted that the expression for the inner aspherical surface is as follows.

[0166] [Expression 1]

[0167]

[0168] ρ is as follows:

[0169] [Expression 2]

[0170]

[0171] In Example 1, the symbol values ​​in the expressions for the inner aspherical surface are as follows.

[0172] C=1 / r2=0.00339665487762633276740237691002

[0173] K=1.0

[0174] A4=-2.3251516E-7

[0175] A5=-4.1016978E-9

[0176] A6=5.4002311E-10

[0177] A7=-1.4792439E-11

[0178] A8=1.4112335E-13

[0179] For example, A4=2.3251516E-7 means 2.3251516×10 - 7.

[0180] The differences between the embodiments are highlighted in the table below.

[0181] [Table 1]

[0182]

[0183] Figure 6A Graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Example 1.

[0184] Figure 6B It is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 1.

[0185] like Figure 6B As shown, in Example 1, as defined by the design objectives, the diopter error in the meridian direction is set to substantially zero, and the diopter error in the sagittal direction is set to a positive value. In other words, even if a diopter error occurs, the value of the diopter error is set so that the focal position does not shift excessively in the rearward direction. As a result, the effect of suppressing the progression of myopia or hyperopia is not affected even in the peripheral area of ​​the spectacle lens.

[0186] Comparative Example 1

[0187] A case (Comparative Example 1) in which the requirements in the mode of the present disclosure are not met will be briefly described. Parameters different from the design in Example 1 are as follows. Parameters other than the following parameters are the same as those of Example 1.

[0188] Base surface: 3.0D

[0189] The outer face, ie the face on the object side, is set to be spherical.

[0190] Surface curvature radius: r1 = 196.333 mm

[0191] Inner curvature radius: r2 = 147.041 mm

[0192] Design goal: Since both surfaces are spherical, no

[0193] Figure 1A : is a graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Comparative Example 1 described later.

[0194] Figure 1B It is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Comparative Example 1 described later.

[0195] like Figure 1B As shown, in Comparative Example 1, the meridional refractive error increases in the negative direction in the peripheral area of ​​the spectacle lens, which is the radius range of 4.5 mm to 25 mm from the lens center. This increase in negative refractive error means that the focal position shifts distally, that is, in the rearward direction. As a result, in Comparative Example 1, there is a concern that "focal position shifts distally," which could impair myopia progression suppression.

[0196] Example 2

[0197] Parameters different from the design in Example 1 are as follows. Parameters other than the following parameters are the same as those of Example 1.

[0198] S:-4.00D

[0199] Inner curvature radius: r2 = 117.785 mm

[0200] Design goal: The refractive power error in the meridian direction (meridian: M) and the refractive power error in the sagittal direction (sagittal: S) are set to zero or greater, and the difference therebetween is set to substantially zero.

[0201] The symbol values ​​in the expressions for the inner aspherical surface different from those in Example 1 are as follows.

[0202] C=1 / r2=0.0084900334854361799660441426146

[0203] A4=-8.6406935E - 07

[0204] A5=-2.4341730E - 09

[0205] A6=7.7912471E - 10

[0206] A7=-1.7568504E - 11

[0207] A8=1.3516874E - 13

[0208] Figure 7A Graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Example 2.

[0209] Figure 7B It is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 2.

[0210] like Figure 7B As shown, in Example 2, as defined by the design objectives, the meridional and sagittal diopter errors are set to zero or greater, and the difference between them is set to substantially zero. In other words, astigmatism is set to substantially zero. In other words, even if a diopter error occurs, the value of the diopter error is set so that the focal position does not shift excessively in the rearward direction. As a result, the effect of suppressing the progression of myopia or hyperopia is not affected even in the peripheral areas of the spectacle lens.

[0211] Example 3

[0212] Parameters different from the design in Example 1 are as follows. Parameters other than the following parameters are the same as those of Example 1.

[0213] S:-4.00D

[0214] The object distance was set to 400 mm.

[0215] Inner curvature radius: r2 = 117.785 mm

[0216] The symbol values ​​in the expressions for the inner aspherical surface different from those in Example 1 are as follows.

[0217] C=1 / r2=0.0084900334854361799660441426146

[0218] A4=-5.1590858E - 07

[0219] A5=4.7732903E - 09

[0220] A6=1.4614985E -10

[0221] A7=-1.3000922E - 12

[0222] A8=-1.2863666E - 14

[0223] Figure 8A Graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Example 3.

[0224] Figure 8B It is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 3.

[0225] like Figure 8B As shown, in Example 3, as defined by the design objectives, the diopter error in the meridian direction is set to substantially zero, and the diopter error in the sagittal direction is set to a positive value. In other words, even if a diopter error occurs, the value of the diopter error is set so that the focal position does not shift excessively in the rearward direction. As a result, the effect of suppressing the progression of myopia or hyperopia is not affected even in the peripheral area of ​​the spectacle lens.

[0226] Example 4

[0227] Parameters different from the design in Example 1 are as follows. Parameters other than the following parameters are the same as those of Example 1.

[0228] The object distance was set to 400 mm.

[0229] Design goal: The refractive power error in the meridian direction (meridian: M) and the refractive power error in the sagittal direction (sagittal: S) are set to zero or greater, and the difference therebetween is set to substantially zero.

[0230] The symbol values ​​in the expressions for the inner aspherical surface different from those in Example 1 are as follows.

[0231] C=1 / r2=0.01189418447065473684210526315789

[0232] A4=-2.5708138E - 07

[0233] A5=3.5356031E - 09

[0234] A6=4.0566938E - 11

[0235] A7=-7.5616032E - 13

[0236] A8=-3.6045394E - 15

[0237] Figure 9A Graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter on the inner surface (aspherical surface) of the lens in Example 4.

[0238] Figure 9B It is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 4.

[0239] like Figure 9B As shown, in Example 4, as defined by the design objectives, the meridional and sagittal diopter errors are set to zero or greater, and the difference between them is set to substantially zero. In other words, astigmatism is set to substantially zero. In other words, even if a diopter error occurs, the value of the diopter error is set so that the focal position does not shift excessively in the rearward direction. As a result, the effect of suppressing the progression of myopia or hyperopia is not affected even in the peripheral areas of the spectacle lens.

[0240] Example 5

[0241] Parameters different from the design in Example 1 are as follows. Parameters other than the following parameters are the same as those of Example 1.

[0242] S:-4.00D

[0243] Base surface: 3.0D

[0244] Surface curvature radius: r1 = 196.333 mm

[0245] Inner curvature radius: r2 = 84.075 mm

[0246] The symbol values ​​in the expressions for the inner aspherical surface different from those in Example 1 are as follows.

[0247] C=1 / r2=0.01189418447065473684210526315789

[0248] A4=-3.8714886E - 07

[0249] A5=-3.4591069E - 09

[0250] A6=5.8607762E - 10

[0251] A7=-1.4532515E - 11

[0252] A8=1.4579488E - 13

[0253] Figure 10A Graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter on the inner surface (aspherical surface) of the lens in Example 5.

[0254] Figure 10B It is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 5.

[0255] like Figure 10B As shown, in Example 5, as defined by the design objectives, the diopter error in the meridian direction is set to substantially zero, and the diopter error in the sagittal direction is set to a positive value. In other words, even if a diopter error occurs, the value of the diopter error is set so that the focal position does not shift excessively in the rearward direction. As a result, the effect of suppressing the progression of myopia or hyperopia is not affected even in the peripheral area of ​​the spectacle lens.

[0256] Example 6

[0257] Parameters different from the design in Example 1 are as follows. Parameters other than the following parameters are the same as those of Example 1.

[0258] Base surface: 3.00D

[0259] Surface curvature radius: r1 = 196.333 mm

[0260] Inner curvature radius: r2 = 147.041 mm

[0261] Design goal: The refractive power error in the meridian direction (meridian: M) and the refractive power error in the sagittal direction (sagittal: S) are set to zero or greater, and the difference therebetween is set to substantially zero.

[0262] The symbol values ​​in the expressions for the inner aspherical surface different from those in Example 1 are as follows.

[0263] C=1 / r2=0.00680080586284488964346349745331

[0264] A4=-1.7774001E - 07

[0265] A5=-6.1130668E - 09

[0266] A6=5.8023185E - 10

[0267] A7=-1.5111573E - 11

[0268] A8=1.4122326E - 13

[0269] Figure 11A Graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter on the inner surface (aspherical surface) of the lens in Example 6.

[0270] Figure 11B It is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 6.

[0271] like Figure 11B As shown, in Example 6, as defined by the design objectives, the meridional and sagittal diopter errors are set to zero or greater, and the difference between them is set to substantially zero. In other words, astigmatism is set to substantially zero. In other words, even if a diopter error occurs, the value of the diopter error is set so that the focal position does not shift excessively in the rearward direction. As a result, the effect of suppressing the progression of myopia or hyperopia is not affected even in the peripheral areas of the spectacle lens.

[0272] Example 7

[0273] Parameters different from the design in Example 1 are as follows. Parameters other than the following parameters are the same as those of Example 1.

[0274] Base surface: 3.0D

[0275] The object distance was set to 400 mm.

[0276] Surface curvature radius: r1 = 196.333 mm

[0277] Inner curvature radius: r2 = 147.041 mm

[0278] The symbol values ​​in the expressions for the inner aspherical surface different from those in Example 1 are as follows.

[0279] C=1 / r2=0.00680080586284488964346349745331

[0280] A4=-1.4060042E - 07

[0281] A5=1.695817E - 09

[0282] A6=6.2492899E - 11

[0283] A7=-1.4892971E - 12

[0284] A8=8.663421E - 15

[0285] Figure 12A Graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Example 7.

[0286] Figure 12B It is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 7.

[0287] like Figure 12B As shown, in Example 7, as defined by the design objectives, the diopter error in the meridian direction is set to substantially zero, and the diopter error in the sagittal direction is set to a positive value. In other words, even if a diopter error occurs, the value of the diopter error is set so that the focal position does not shift excessively in the rearward direction. As a result, the effect of suppressing the progression of myopia or hyperopia is not affected even in the peripheral area of ​​the spectacle lens.

[0288] Example 8

[0289] Parameters different from the design in Example 1 are as follows. Parameters other than the following parameters are the same as those of Example 1.

[0290] S:-4.00D

[0291] Base surface: 3.0D

[0292] The object distance was set to 400 mm.

[0293] Surface curvature radius: r1 = 196.333 mm

[0294] Inner curvature radius: r2 = 84.075 mm

[0295] Design goal: The refractive power error in the meridian direction (meridian: M) and the refractive power error in the sagittal direction (sagittal: S) are set to zero or greater, and the difference therebetween is set to substantially zero.

[0296] The symbol values ​​in the expressions for the inner aspherical surface different from those in Example 1 are as follows.

[0297] C=1 / r2=0.01189418447065473684210526315789

[0298] A4=-3.7290196E - 07

[0299] A5=5.4200462E - 09

[0300] A6=7.0189935E - 11

[0301] A7=-4.7759548E - 13

[0302] A8=-9.6189829E - 15

[0303] Figure 13A Graph showing the relationship between the distance from the lens center (horizontal axis) and the surface diopter (vertical axis) on the inner surface (aspherical surface) of the lens in Example 8.

[0304] Figure 13B It is a graph showing the relationship between the distance from the lens center (horizontal axis) and the transmission power error in the meridian direction and the transmission power error in the sagittal direction (vertical axis) in the first area (base part) of the eyeglass lens in Example 8.

[0305] like Figure 13B As shown, in Example 8, as defined by the design objectives, the meridional and sagittal diopter errors are set to zero or greater, and the difference between them is set to substantially zero. In other words, astigmatism is set to substantially zero. In other words, even if a diopter error occurs, the value of the diopter error is set so that the focal position does not shift excessively in the rearward direction. As a result, the effect of suppressing the progression of myopia or hyperopia is not affected even in the peripheral areas of the spectacle lens.

[0306] Aspects of the present disclosure of "spectacle lenses and design methods thereof" are summarized as follows.

[0307] The embodiments of the present disclosure are as follows.

[0308] “A spectacle lens comprising:

[0309] a first region that causes light incident on the object side of the lens to exit from the eyeball side of the lens and converge at a predetermined position A on the wearer's retina; and

[0310] a plurality of second regions configured to converge the light at a position B on the object side or a position C on the far side relative to the position A,

[0311] Wherein, in a first area in the peripheral area of ​​the spectacle lens, the peripheral area is a radius range of 4.5 mm to 25 mm from the center of the lens, if the second area causes light to converge at position B, then the refractive error in the meridian direction and the refractive error in the sagittal direction have values ​​such that light converges in a direction extending from near position A toward position B, or if the second area causes light to converge at position C, then the refractive error in the meridian direction and the refractive error in the sagittal direction have values ​​such that light converges in a direction extending from near position A toward position C.

Claims

1. A spectacle lens for inhibiting the progression of hyperopia, comprising: a first area that causes light incident on the object side of the lens to exit from the eyeball side of the lens and converge at a predetermined position A on the wearer's retina; and a plurality of second regions configured to converge the light at a position C on a far side relative to the position A, wherein, in the first region of the peripheral region of the spectacle lens, the refractive error in the meridian direction and the refractive error in the sagittal direction have values ​​such that the light rays converge in a direction extending from the vicinity of the position A toward the position C, wherein the peripheral region is a radius range of 4.5 mm to 25 mm from the center of the lens, wherein the second region is a recessed region, and In the first area in the peripheral area, both the refractive power error in the meridian direction and the refractive power error in the sagittal direction are +0.25D or less.

2. The spectacle lens according to claim 1, The refractive power error in the meridian direction or the refractive power error in the sagittal direction is -0.12D or more and +0.12D or less, and is lower than the value of the other refractive power error.

3. The spectacle lens according to claim 1 or 2, in, The refractive power error in the meridian direction or the refractive power error in the sagittal direction has a value obtained by performing ray tracing at a finite distance.

4. A method for designing a spectacle lens for inhibiting the progression of hyperopia, the spectacle lens comprising: a first area that causes light incident on the object side of the lens to exit from the eyeball side of the lens and converge at a predetermined position A on the wearer's retina; as well as a plurality of second regions configured to converge the light at a position C on a far side relative to the position A, The method comprises: In the first area of ​​the peripheral area of ​​the spectacle lens, the refractive power error in the meridian direction and the refractive power error in the sagittal direction are set to values ​​such that the light rays converge in a direction extending from the vicinity of the position A toward the position C, wherein the peripheral area is a radius range of 4.5 mm to 25 mm from the center of the lens, wherein the second region is a recessed region, and In the first area in the peripheral area, the refractive power error in the meridian direction and the refractive power error in the sagittal direction are both +0.25D or less.

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