Spectacles and spectacle lens

Abstract

To provide technology in spectacles with spectacle lenses that exhibit a myopia progression inhibiting effect or a hyperopia mitigating effect, for ensuring peripheral vision while inhibiting habituation of upward or downward gazing, thereby facilitating attaining the myopia progression inhibiting effect or hyperopia mitigating effect.SOLUTION: Spectacles have spectacle lenses that exhibit a myopia progression inhibiting effect or a hyperopia mitigating effect. The spectacle lenses each have: a central clear region which achieves prescribed refractive power for a wearer and includes an eye point of the spectacle lens; an annular functional region which has a portion having different refractive power than the prescribed refractive power and surrounds the central clear region; and an annular peripheral clear region which achieves the prescribed refractive power and surrounds the functional region; where, on the vertical straight line passing through the eye point, the width of the peripheral clear region in the vertical direction is smaller than the circle equivalent diameter of the central clear region.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] As one form of spectacle lens that has the effect of inhibiting the progression of myopia or reducing hyperopia, for example, Patent Document 1 describes a spectacle lens that has a clear area and a functional area. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7177959 Summary of the Invention [Problem to be solved by the invention]

[0004] An embodiment of the present invention aims to provide a technology in which, in glasses having spectacle lenses that have the effect of inhibiting the progression of myopia or reducing hyperopia, the effect of inhibiting the progression of myopia or reducing hyperopia is easily obtained by suppressing the habit of looking up or down while ensuring peripheral vision. [Means for solving the problem]

[0005] The first aspect of the present invention is A pair of glasses having a spectacle lens that has an effect of inhibiting the progression of myopia or reducing hyperopia, The eyeglass lens is A central clear area that realizes the wearer's prescribed refractive power and includes the eye point of the spectacle lens; a ring-shaped functional area having a portion having a refractive power different from the prescribed refractive power and surrounding the central clear area; and an annular peripheral clear area that achieves the prescribed power and surrounds the functional area, The eyeglasses have a vertical width of the peripheral clear area on a vertical line passing through the eye point that is smaller than a circular equivalent diameter of the central clear area.

[0006] A second aspect of the present invention is In the eyeglasses according to the first aspect, the horizontal width of the peripheral clear area on a horizontal line passing through the eye point is larger than the circle-equivalent diameter of the central clear area.

[0007] A third aspect of the present invention is In the eyeglasses according to the first aspect, the peripheral clear area has a width in the vertical direction of 2.5 mm or more and 5.0 mm or less.

[0008] A fourth aspect of the present invention is In the eyeglasses according to the first aspect, the central clear area is sized to fit within a circle having a diameter of 4 mm to 13 mm centered on the eyepoint.

[0009] A fifth aspect of the present invention is The eyeglasses according to the first aspect, wherein the area of ​​the central clear area is 4% or more and 16% or less of the sum of the areas of the central clear area and the function area.

[0010] A sixth aspect of the present invention is a method for producing a composition comprising the steps of: The eyeglasses according to any one of the first to fifth aspects further have a frame with a vertical width of 27 mm to 38 mm and a horizontal width of 42 mm to 50 mm.

[0011] A seventh aspect of the present invention is A spectacle lens having an effect of inhibiting the progression of myopia or reducing hyperopia, A central clear area that realizes the wearer's prescribed refractive power and includes the eye point of the spectacle lens; a ring-shaped functional area having a portion having a refractive power different from the prescribed refractive power and surrounding the central clear area; and an annular peripheral clear area that achieves the prescribed power and surrounds the functional area, This is a spectacle lens in which, when cut to fit a frame with a vertical width of 27 mm or more and 38 mm or less, the vertical width of the peripheral clear area on a vertical line passing through the eyepoint is smaller than the circular equivalent diameter of the central clear area. Effect of the Invention

[0012] According to one embodiment of the present invention, in glasses having spectacle lenses that have the effect of inhibiting the progression of myopia or reducing hyperopia, it is possible to prevent the habit of looking up or down while maintaining peripheral vision, making it easier to obtain the effect of inhibiting the progression of myopia or reducing hyperopia. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a schematic plan view of the object side surface of a left-eye spectacle lens according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic plan view showing an example of a spectacle lens having an effect of inhibiting the progression of myopia according to a reference example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] <Inventor's findings> First, the findings obtained by the inventor will be described. FIG. 2 is a schematic plan view showing an example of a spectacle lens having a myopia progression suppression effect according to a reference example. As shown in FIG. 2, the spectacle lens 100 according to the reference example has a central clear area 110, a functional area 120, and a peripheral clear area 130. The central clear area 110 and the peripheral clear area 130 are areas with good visibility that realize the prescribed refractive power of the wearer. On the other hand, the functional area 120, for example, has a plurality of convex areas formed therein, and is an area with poor visibility compared to the central clear area 110 and the peripheral clear area 130. With these configurations, the spectacle lens 100 has a myopia progression suppression effect. Details of each area will be described later.

[0015] As described in Patent Document 1, from the viewpoint of efficiently obtaining the myopia progression suppression effect, it is preferable to arrange the functional area 120 close to the eye point (EP). However, as a result of arranging the functional area 120 close to the eye point, the central clear area 110 becomes narrow and the peripheral clear area 130 becomes wide, and it has been found that there are many cases where the wearer shifts the glasses up and down and looks at things by looking up or down (i.e., looking at things using the peripheral clear area 130). Spectacle lenses that have the effect of suppressing myopia progression are often designed especially for children (e.g., elementary school students), and this problem is particularly evident when the wearer is a child. If such a state becomes a habit, it may be difficult to obtain the myopia progression suppression effect, and it may also cause strabismus and poor posture.

[0016] The inventors have conducted extensive research into the above-mentioned problems. As a result, they have found that by making the vertical width of the peripheral clear area on a vertical line passing through the eyepoint smaller than the circular equivalent diameter of the central clear area, the motivation to move the glasses up and down to look at things using the peripheral clear area is reduced, and the habit of looking up or down is suppressed, making it easier to obtain a myopia progression suppression effect or a hyperopia reduction effect (hereinafter also referred to as a myopia progression suppression effect, etc.). In addition, they have found that by providing a peripheral clear area so as to surround the functional area, a minimum peripheral vision can be secured, thereby increasing safety.

[0017] [Details of the embodiment of the present invention] Next, an embodiment of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0018] 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 a wearer wears spectacles equipped with the spectacle lens, and the "eyeball-side surface" is the opposite, that is, the surface that is located on the eyeball side when a wearer wears spectacles equipped with the spectacle lens. This relationship also applies to the lens substrate that is the basis of the spectacle lens. In other words, the lens substrate also has an object-side surface and an eyeball-side surface.

[0019] In this specification, the eye point (EP) is, for example, the position through which the line of sight passes when the wearer is wearing the glasses and facing straight ahead, and this example will be given below. The eye point may be the position through which the wearer's line of sight passes when he or she visually recognizes an object close to the wearer (in other words, when looking at something close), that is, the near vision eye point. In one aspect of the present invention, a case is exemplified in which the geometric center of the eyeglass lens before being framed coincides with the eye point, coincides with the prism reference point, and coincides with the lens center. The eye point can be specified by referring to a remark chart or centration chart issued by the lens manufacturer.

[0020] First embodiment of the present invention (1) Eyeglasses and eyeglass lenses Fig. 1 is a schematic plan view of the object side surface of a left-eye spectacle lens 10 of this embodiment. The spectacle lens 10 of this embodiment is a myopia progression inhibiting lens that has a myopia progression inhibiting effect, and has a central clear area 11, a functional area 12, and a peripheral clear area 13. The spectacle lens 10 of this embodiment is in a state where it is cut to fit a frame, as shown in Fig. 1.

[0021] The central clear area 11 is an area that realizes the prescribed refractive power of the wearer and includes the eye point of the eyeglass lens 10. In this embodiment, an example is shown in which the central clear area 11 is circular and the center of the central clear area 11 coincides with the eye point of the eyeglass lens 10. The central clear area 11 is, for example, a transparent part having a smooth surface shape, and is an area that causes a light beam incident from the surface on the object side to exit from the surface on the eyeball side, enter the pupil of the wearer, and converge on the retina.

[0022] The prescribed power (spherical power, cylindrical power, cylindrical axis, etc.) can be realized by the central clear area 11. This spherical power may be a power (distance power) to be corrected when looking straight ahead (when the distance from the object is about infinity to 1 m), or may be a power to be corrected when looking at intermediate distances (when the distance from the object is about 1 m to 40 cm) or near distances (when the distance from the object is about 40 cm to 10 cm).

[0023] Moreover, the central clear area 11 is not provided with any configuration (for example, a convex area or a concave area) intended to exert an effect of inhibiting the progression of myopia.

[0024] The central clear area 11 of this embodiment (and the base area 14 and the peripheral clear area 13 in the functional area 12 described later) functions as a so-called single focal length lens. The surface shape is not particularly limited, but in this embodiment, the central clear area 11 is exemplified as having a spherical shape.

[0025] The functional region 12 is an annular region having a portion having a refractive power different from the prescribed refractive power of the wearer and surrounding the central clear region 11. In this embodiment, the functional region 12 is provided with a plurality of convex regions 15 (also called defocus regions) in an island shape as a portion having a refractive power different from the prescribed refractive power of the wearer. More specifically, as shown in FIG. 1, the convex regions 15 are independently and discretely arranged so that the centers of the respective convex regions 15 are the apexes of an equilateral triangle. In the functional region 12, the portion other than the convex regions 15 is a base region 14 that performs the same function as the central clear region 11. The functional region 12 is, for example, a region that causes a light beam incident from a surface on the object side to exit from a surface on the eyeball side, while at least a portion of the light beam incident into the pupil of the wearer is not converged on the retina, and thus the eyeglass lens 10 of this embodiment has an effect of suppressing the progression of myopia. In this embodiment, as shown in FIG. 1, the functional region 12 may be defined as a region between a circle centered on the eyepoint and tangent to the convex region 15 closest to the eyepoint, and a circle centered on the convex region 15 farthest from the eyepoint.

[0026] The multiple convex regions 15 may be formed on at least one of the object side surface or the eyeball side surface of the eyeglass lens 10. In this embodiment, a case where multiple convex regions 15 are provided only on the object side surface of the eyeglass lens 10 is illustrated. The surface shape of the convex regions 15 is preferably, for example, a spherical shape. The number of multiple convex regions 15 in the functional region 12 is not particularly limited, but is, for example, 20 to 500.

[0027] The multiple convex regions 15 are arranged, for example, in an island shape (i.e., spaced apart and not adjacent to each other). The arrangement of the multiple convex regions 15 is preferably periodic. This can reduce discomfort such as blurring in a specific direction and improve the wearing comfort of the eyeglass lens 10.

[0028] The diameter of the convex region 15 in plan view is preferably, for example, 0.6 mm or more and 2.0 mm or less. The pitch of the convex regions 15 (the center-to-center distance between adjacent convex regions 15) is preferably, for example, 1.0 mm or more and 2.0 mm or less. The difference (defocus power) between the refractive power of the convex region 15 and the refractive power of the portion other than the convex region 15 is preferably, for example, 0.5 D or more and 10 D or less.

[0029] Although the convex regions 15 may be arranged in areas other than the functional region 12, from the viewpoint of improving the wearing comfort of the eyeglass lens 10, it is preferable that, for example, 80% or more (more preferably 90% or more) of all the convex regions 15 provided on the eyeglass lens 10 are arranged in the functional region 12.

[0030] In the functional region 12, the area ratio of the convex region 15 is preferably, for example, 30% or more and 60% or less (more preferably 40% or more and 60% or less). If the area ratio of the convex region 15 is less than 30%, there is a possibility that the effect of inhibiting the progression of myopia may not be sufficiently obtained. In contrast, by setting the area ratio of the convex region 15 to 30% or more, it is possible to sufficiently obtain the effect of inhibiting the progression of myopia. On the other hand, if the area ratio of the convex region 15 exceeds 60%, there is a possibility that the wearing comfort and the appearance of the eyeglass lens 10 may be adversely affected. In contrast, by setting the area ratio of the convex region 15 to 60% or less, it is possible to maintain the wearing comfort and the appearance of the eyeglass lens 10.

[0031] The peripheral clear area 13 is an annular area that realizes the prescribed refractive power of the wearer and surrounds the functional area 12. In this embodiment, the peripheral clear area 13 performs the same function as the central clear area 11. In addition, since the peripheral clear area 13 is provided along the outer periphery of the spectacle lens 10 so as to surround the functional area 12, a minimum level of peripheral vision can be ensured.

[0032] Here, the central clear area 11 and the peripheral clear area 13 are areas with good visibility that realize the prescribed refractive power of the wearer. On the other hand, the functional area 12 has a plurality of convex areas 15 formed therein, and is an area with poorer visibility than the central clear area 11 and the peripheral clear area 13. Therefore, for example, if the central clear area 11 is narrow and the peripheral clear area 13 is wide, the wearer may shift the glasses up and down and look at things by looking up or down (using the peripheral clear area 13 to look at things). If such a state becomes a habit, it may be difficult to obtain the effect of inhibiting the progression of myopia, and it may also cause strabismus or poor posture.

[0033] In contrast, in the eyeglass lens 10 of the present embodiment, the vertical width of the peripheral clear area 13 on a vertical line passing through the eye point is smaller than the circle-equivalent diameter d of the central clear area 11. As shown in FIG. 1, the vertical width of the peripheral clear area 13 on a vertical line passing through the eye point can be measured at two points, the top and bottom of the eyeglass lens 10, and both the vertical width w1 (upper side of FIG. 1) and the horizontal width w2 (lower side of FIG. 1) are smaller than the circle-equivalent diameter d of the central clear area 11. This reduces the motivation to move the glasses up and down to use the peripheral clear area 13 to see things, and suppresses the habit of looking up or down, making it easier to obtain the effect of suppressing the progression of myopia. Note that, from the viewpoint of ensuring a minimum level of peripheral vision, the widths w1 and w2 are preferably greater than 0 mm. Also, from the viewpoint of further suppressing the motivation to use the peripheral clear area 13 to see things, the widths w1 and w2 are preferably smaller than (π / 4)d.

[0034] On the other hand, the horizontal width of the peripheral clear area 13 on a horizontal line passing through the eye point is preferably larger than the circle-equivalent diameter d of the central clear area 11. As shown in FIG. 1, the horizontal width of the peripheral clear area 13 on a horizontal line passing through the eye point can be measured at two points, the left and right, of the eyeglass lens 10, and it is preferable that at least one of the width w3 on the nose side (left side of FIG. 1) or the width w4 on the ear side (right side of FIG. 1) is larger than the circle-equivalent diameter d of the central clear area 11. This makes it easier to ensure sufficient peripheral vision and improves safety. In addition, because it is more difficult to see an object by shifting the eyeglasses left and right than to see an object by shifting them up and down due to the structure of the eyeglasses, even if the width w3 or the width w4 is larger than the circle-equivalent diameter d of the central clear area 11, the motivation to see an object using the peripheral clear area 13 is suppressed. In addition, it is more preferable that the width w4 on the ear side is larger than the width w3 on the nose side from the viewpoint of ensuring peripheral vision and suppressing the motivation to see an object using the peripheral clear area 13.

[0035] Moreover, the width w1 and the width w2 are preferably, for example, 2.5 mm or more and 5.0 mm or less. If the width w1 and the width w2 are less than 2.5 mm, the peripheral vision in the vertical direction may be insufficient. In contrast, by setting the width w1 and the width w2 to 2.5 mm or more, the peripheral vision in the vertical direction can be sufficiently secured. On the other hand, if the width w1 and the width w2 exceed 5.0 mm, the possibility that the wearer uses the peripheral clear area 13 to see objects increases, so that the myopia progression suppression effect, etc. may be difficult to obtain. In contrast, by setting the width w1 and the width w2 to 5.0 mm or less, it becomes difficult to see objects using the peripheral clear area 13, so that the myopia progression suppression effect, etc. can be more easily obtained. Setting width w1 and width w2 to 5.0 mm or less corresponds to, for example, setting the width of the area with high visibility to less than the pupil diameter of the wearer when the wearer looks up or down, and setting width w1 and width w2 to 2.5 mm or more corresponds to, for example, setting the width of the area with high visibility to more than half the pupil diameter of the wearer.

[0036] Furthermore, it is preferable that the maximum value of the vertical width of the peripheral clear area 13 on a vertical line passing through the central clear area 11 is smaller than the circle-equivalent diameter d of the central clear area 11. This reduces the motivation to use the peripheral clear area 13 to look at things even when the line of sight moves slightly left or right from the eyepoint, and suppresses the habit of looking up or down, making it easier to obtain the effect of inhibiting the progression of myopia, etc. Also, it is more preferable that the maximum value of the vertical width of the peripheral clear area 13 on a vertical line passing through the central clear area 11 is, for example, 2.5 mm or more and 5.0 mm or less.

[0037] The central clear area 11 is preferably sized to fit within a circle having a diameter of 4 mm to 13 mm (more preferably 6 mm to 11 mm) centered on the eyepoint. This improves the wearing comfort of the spectacles and provides a sufficient effect of inhibiting the progression of myopia. When the central clear area 11 is circular and the center of the central clear area 11 coincides with the eyepoint, as in this embodiment, the fact that the central clear area 11 fits within a circle having a diameter of 4 mm to 13 mm and centered on the eyepoint can be rephrased as the circle-equivalent diameter d of the central clear area 11 being 4 mm to 13 mm.

[0038] The area of ​​the central clear region 11 is preferably 4% to 16% of the sum of the areas of the central clear region 11 and the functional region 12 (corresponding to the diameter of the central clear region 11 being 25% to 40% of the outer diameter of the functional region 12), and more preferably 6.3% to 12.3% (corresponding to the diameter of the central clear region 11 being 25% to 35% of the outer diameter of the functional region 12). If the area of ​​the central clear region 11 is smaller than 4% of the sum of the areas of the central clear region 11 and the functional region 12, it may be difficult to find a clear zone in the functional region 12, and the motivation to see things using the peripheral clear region 13 may be easily induced. Also, if the area of ​​the central clear region 11 is larger than 16% of the sum of the areas of the central clear region 11 and the functional region 12, the functional region 12 may be relatively insufficient, and the effect of inhibiting myopia progression may be difficult to work. On the other hand, by making the area of ​​the central clear region 11 4% or more and 16% or less (more preferably 6.3% or more and 12.3% or less) of the sum of the areas of the central clear region 11 and the functional region 12, the central clear region 11 becomes easier for the wearer to recognize, and the functional region 12 acts effectively, making it easier to obtain effects such as inhibiting the progression of myopia.

[0039] By fitting the spectacle lens 10 of this embodiment into a predetermined frame, it is possible to realize glasses having the spectacle lens 10 that has the effect of suppressing the progression of myopia. The frame of the glasses of this embodiment has, for example, a vertical width L1 of 27 mm to 38 mm and a horizontal width L2 (also called lens width) of 42 mm to 50 mm. The above frame size is assumed to be a general frame for children, but for example, a frame with a vertical width L1 of 30 mm or less may cause the glasses to be shifted downward to look at objects from outside the frame. Therefore, in consideration of the above problem, it is more preferable that the frame of the glasses of this embodiment has a vertical width L1 of 31 mm to 38 mm.

[0040] As the lens substrate constituting the spectacle lens 10, various lens substrates generally used can be used. The lens substrate may be, for example, a plastic lens substrate or a glass lens substrate. The glass lens substrate may be, for example, a lens substrate made of inorganic glass. As the lens substrate, a plastic lens substrate is preferable from the viewpoint of being lightweight and difficult to break. Examples of the plastic lens substrate include styrene resins such as (meth)acrylic resins, polycarbonate resins, allyl resins, allyl carbonate resins such as diethylene glycol bisallyl carbonate resin (CR-39), vinyl resins, polyester resins, polyether resins, urethane resins obtained by reacting an isocyanate compound with a hydroxy compound such as diethylene glycol, thiourethane resins obtained by reacting an isocyanate compound with a polythiol compound, and a cured product (generally called a transparent resin) obtained by curing a curable composition containing a (thio)epoxy compound having one or more disulfide bonds in the molecule. The curable composition may be called a polymerizable composition. As the lens substrate, a non-dyed one (colorless lens) or a dyed one (dyed lens) may be used. The thickness of the lens substrate is not particularly limited, but may be, for example, about 1 to 30 mm (center thickness). The refractive index of the lens substrate may be, for example, about 1.60 to 1.75. However, the refractive index of the lens substrate is not limited to this range, and may be within this range or may be above or below this range. In this specification, the refractive index refers to the refractive index for light with a wavelength of 500 nm.

[0041] (2) Modifications, etc. Although the embodiment of the present invention has been specifically described above, the present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the gist of the present invention.

[0042] In the above-described embodiment, the case where the eyeglass lens 10 has the effect of inhibiting the progression of myopia has been described. However, for example, by changing the convex region 15 to a concave region, the present invention can also be applied to eyeglass lenses that have the effect of reducing hyperopia, and to eyeglasses having such eyeglass lenses.

[0043] In the above embodiment, the case where the eyeglass lens 10 is cut to fit the frame has been described, but the present invention is also applicable to eyeglass lenses before cutting. In this case, the central clear area, the functional area, and the peripheral clear area may be designed so that, for example, when the eyeglass lens 10 is cut to fit a frame having a vertical width of 27 mm or more and 38 mm or less (preferably 31 mm or more and 38 mm or less), the vertical width of the peripheral clear area on a vertical line passing through the eye point is smaller than the circle equivalent diameter of the central clear area. In addition, it is preferable to design the central clear area, the functional area, and the peripheral clear area so that, for example, when the eyeglass lens 10 is cut to fit a frame having a horizontal width of 42 mm or more and 50 mm or less, the horizontal width of the peripheral clear area on a horizontal line passing through the eye point is larger than the circle equivalent diameter of the central clear area. Other features similar to those of the above embodiment are applicable. EXAMPLES

[0044] Next, examples of the present invention will be described. These examples are merely examples of the present invention, and the present invention is not limited to these examples.

[0045] In this example, glasses samples 1 to 6 were designed as glasses having spectacle lenses that have a myopia progression suppression effect. In this example, a model was used in which the frame box center, lens center, and center of each area (central clear area, functional area, peripheral clear area) were at the same point (matching the eye point). Two types of frames were used: a frame (Frame A) for lower grades of elementary school with a vertical width of 29 mm and a horizontal width of 44 mm, and a frame (Frame B) for upper grades of elementary school with a vertical width of 36 mm and a horizontal width of 48 mm.

[0046] The spectacle lenses of Samples 1 to 6 have the following common configuration. Lens material: PC (polycarbonate) Lens material refractive index: 1.589 Prescription power (spherical power): 0.00D Prescription power (Cylinder power): 0.00D Functional area configuration: Convex areas arranged in islands Shape of convex area: Spherical - Convex area power: 3.50D Surface forming the convex area: Surface on the object side - Arrangement of convex areas: The center of each convex area is arranged to be the vertex of an equilateral triangle. Planar shape of the convex area: Circular (diameter 1.00 mm) Convex area pitch (center distance between adjacent convex areas): 1.50mm

[0047] In sample 1, a spectacle lens (lens 1) having a central clear area with a circle equivalent diameter of 7.8 mm and a functional area with an outer diameter of 26.1 mm was applied to frame 1.

[0048] In sample 2, the same eyeglass lens (lens 1) as in sample 1 was applied to frame 2.

[0049] In sample 3, a spectacle lens (lens 2) having a central clear area with a circle equivalent diameter of 7.8 mm and a functional area with an outer diameter of 22.5 mm was applied to frame 1.

[0050] In sample 4, a spectacle lens (lens 2) similar to that in sample 2 was applied to frame 2.

[0051] In sample 5, a spectacle lens (lens 3) having a central clear area with a circle equivalent diameter of 9.4 mm and a functional area with an outer diameter of 26.1 mm was applied to frame 1.

[0052] In sample 6, a spectacle lens (lens 4) having a central clear area with a circle equivalent diameter of 6.9 mm and a functional area with an outer diameter of 20 mm was applied to frame 2.

[0053] For the glasses of Samples 1 to 6, the vertical and horizontal widths of the peripheral clear area were measured on a vertical (or horizontal) straight line passing through the eyepoint. The results are shown in Table 1.

[0054] [Table 1]

[0055] As shown in Table 1, in the glasses of Samples 1 to 4, the vertical width of the peripheral clear area is smaller than the circular equivalent diameter of the central clear area. This reduces the motivation to move the glasses up and down and use the peripheral clear area to see objects, making it easier to achieve the myopia progression suppression effect. In the glasses of Sample 5, the vertical width of the peripheral clear area is 0 mm, so from the viewpoint of ensuring a minimum peripheral vision, Samples 1 to 4 are preferable. In the glasses of Sample 6, the vertical width of the peripheral clear area is larger than the circular equivalent diameter of the central clear area, so there is a possibility that the peripheral clear area will be used to see objects, making it difficult to achieve the myopia progression suppression effect.

[0056] In addition, in the glasses of Samples 1 to 4, the horizontal width of the peripheral clear area was larger than the equivalent circle diameter of the central clear area. This makes it easier to ensure sufficient peripheral vision and increases safety. In the glasses of Sample 5, the horizontal width of the peripheral clear area is smaller than the equivalent circle diameter of the central clear area, so it may be difficult to ensure peripheral vision.

[0057] In addition, in the glasses of Samples 2 and 3, the vertical width of the peripheral clear area was within the range of 2.5 mm to 5.0 mm. This makes it easier to obtain the effect of inhibiting the progression of myopia while ensuring sufficient peripheral vision in the vertical direction. Therefore, it can be said that the design of Lens 2 is more preferable for Frame A, and the design of Lens 1 is more preferable for Frame B.

[0058] From the above, it has been confirmed that in glasses having spectacle lenses that have the effect of inhibiting the progression of myopia, etc., by designing them taking into consideration not only each area (central clear area, functional area, peripheral clear area) but also the frame size, it is possible to ensure peripheral vision while preventing the habit of looking up or down, making it easier to achieve the effect of inhibiting the progression of myopia, etc. [Explanation of symbols]

[0059] 10, 100 Glasses Lenses 11, 110 Central clear area 12, 120 Functional Area 13, 130 Peripheral clear area 14 Base Area 15 Convex region

Claims

1. A pair of glasses having a spectacle lens that has an effect of inhibiting the progression of myopia or reducing hyperopia, The eyeglass lens is A central clear area that realizes the wearer's prescribed refractive power and includes the eye point of the spectacle lens; a ring-shaped functional area having a portion having a refractive power different from the prescribed refractive power and surrounding the central clear area; and an annular peripheral clear area that achieves the prescribed power and surrounds the functional area, The eyeglasses, wherein a vertical width of the peripheral clear area on a vertical line passing through the eye point is smaller than a circular equivalent diameter of the central clear area.

2. The eyeglasses according to claim 1 , wherein a horizontal width of the peripheral clear area on a horizontal line passing through the eye point is larger than a circular equivalent diameter of the central clear area.

3. The eyeglasses according to claim 1 , wherein a width in a vertical direction of the peripheral clear area is 2.5 mm or more and 5.0 mm or less.

4. The eyeglasses according to claim 1 , wherein the central clear area is sized to fit within a circle having a diameter of 4 mm to 13 mm and centered at the eye point.

5. The eyeglasses according to claim 1 , wherein an area of ​​the central clear region is equal to or greater than 4% and equal to or less than 16% of a sum of an area of ​​the central clear region and the functional region.

6. The eyeglasses according to claim 1 , further comprising a frame having a vertical width of 27 mm to 38 mm and a horizontal width of 42 mm to 50 mm.

7. A spectacle lens having an effect of inhibiting the progression of myopia or reducing hyperopia, A central clear area that realizes the wearer's prescribed refractive power and includes the eye point of the spectacle lens; a ring-shaped functional area having a portion having a refractive power different from the prescribed refractive power and surrounding the central clear area; and an annular peripheral clear area that achieves the prescribed power and surrounds the functional area, When the eyeglass lens is cut to fit a frame having a vertical width of 27 mm or more and 38 mm or less, the vertical width of the peripheral clear area on a vertical line passing through the eyepoint is smaller than the circle equivalent diameter of the central clear area.

Images