Eyeglass lenses

Abstract

To provide a technique which provides good visibility even for near vision when wearing a spectacle lens having a clear region and a functional region.SOLUTION: A spectacle lens 1 and associated technique are provided, the spectacle lens having a central clear region 2, including an eye point EP, designed to allow rays incident from an object-side surface to exit from an eyeball-side surface and allow the rays to enter a pupil of a wearer and converge on the retina, and a functional region 3, a ring-like region surrounding the central clear region 2, designed to allow the rays incident from an object-side surface to exit from the eyeball-side surface and to prevent at least a portion of the rays entering the pupil of the wearer from converging on the retina, where, in plan view, the central clear region 2 extends more toward the nose side than the ear side in a horizontal direction viewing from the eye point EP.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to spectacle lenses.

Background Art

[0002] As a spectacle lens for suppressing the progression of refractive errors such as myopia, there is one in which island regions having a refractive power plus than a plurality of prescribed refractive powers are formed on the lens (see, for example, Patent Document 1).

[0003] According to the spectacle lens having this configuration, among the light beams incident from the object-side surface and exiting from the eyeball-side surface, the light beams passing through other than the defocus region are focused on the wearer's retina, but the light beams passing through the defocus region are focused at a position in front of the retina, and thus the progression of myopia is suppressed.

[0004] In FIG. 1 of Patent Document 1, a case where the above island region is not provided at the geometric center of the lens and in its vicinity is illustrated.

[0005] Patent Documents 2 and 3 disclose spectacle lenses provided with a predetermined structure on the outer edge side rather than at the geometric center of the spectacle lens and in its vicinity in order to suppress the progression of refractive errors of myopia. In the spectacle lenses described in Patent Documents 2 and 3, in a plan view, at the geometric center and in its vicinity, a structure having an effect of suppressing the progression of myopia is not provided (FIG. 1 of Patent Document 2, FIG. 5A of Patent Document 3).

[0006] Patent Document 4 describes a spectacle lens including a base portion that causes a light beam incident from the object-side surface to exit from the eyeball-side surface and converge at position A on the retina of the eyeball, and a defocus region that gives a plus or minus defocus to the transmitted light beam and has an effect of converging at a position different from the light passing through the base portion.

[0007] Paragraph 0102 of Patent Document 4 describes how changing the convex portion of the base material of an eyeglass lens to a concave portion can provide a function to suppress the progression of hyperopia. In an example of an eyeglass lens described in Patent Document 4 (Figure 5 of Patent Document 4), in a plan view, no structure is provided at the geometric center and its vicinity that provides a myopia or hyperopia progression suppression effect. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] U.S. Patent Application Publication No. 2017 / 0131567 [Patent Document 2] International Public Gazette WO2019 / 166657 [Patent Document 3] U.S. Patent No. 10884264 [Patent Document 4] International Public Gazette WO2020 / 045567 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] If the above-mentioned myopia progression suppression structure (for example, the island-shaped region described in Patent Document 1) is not provided at the center of the lens, then naturally, the light beam that passes through the region without the island-shaped region and enters the wearer's pupil will not provide the above-mentioned myopia progression suppression effect. Instead, the prescribed power is achieved in the clear region, resulting in good visibility. In this specification, the region in which the myopia or hyperopia progression suppression structure is not provided is also referred to as the clear region. The clear region will be described later.

[0010] The inventors' research has revealed that when a wearer of eyeglass lenses designed to suppress myopia progression converges their eyes while looking at something close up, the light beam entering the wearer's pupil passes through the island-like region instead of the clear region, which may prevent the light beam from converging on the retina, thus potentially resulting in poor visibility.

[0011] Regarding this problem, the inventors' research has revealed that the same problem occurs not only with the island-shaped regions mentioned above, but also with configurations that have a myopia or hyperopia progression suppression effect (such as configurations in which some concave and / or convex regions are formed on the surface of the spectacle lens or materials with different refractive indices are embedded inside the spectacle lens, for example, spectacle lenses described in Patent Documents 2 to 4). In plan view, the region having the configuration that has the myopia or hyperopia progression suppression effect is also called the functional region. The functional region will be described later.

[0012] To more easily obtain the above-mentioned myopia progression suppression effect, it is conceivable to design the clear area to be smaller and the functional area to be larger. However, if the clear area is designed to be small, when the wearer focuses on near objects and converges their eyes, good visibility may not be obtained, as described above. In other words, the inventors have found that in spectacle lenses equipped with a clear area and a functional area to achieve a myopia or hyperopia progression suppression effect, it is necessary to consider an approach other than the method described in this paragraph.

[0013] One aspect of the present invention aims to provide a technology that allows for good visibility even when viewing objects at close range when wearing eyeglass lenses having a clear region and a functional region. [Means for solving the problem]

[0014] A first aspect of the present invention is: A central clear region including the eye point, where a light beam incident from the object-side surface is directed out from the eye-side surface, enters the wearer's pupil, and converges onto the retina. An annular region surrounding the aforementioned central clear region, comprising a functional region that causes light beams incident from the object-side surface to exit from the eye-side surface, while preventing at least a portion of the light beams incident in the wearer's pupil from converging onto the retina, Equipped with, In a plan view, the maximum horizontal width of the rectangular portion within the central clear area, in the range between d[mm] above and d[mm] below the horizontal line passing through the eye point, is greater on the nasal side of the eye point than on the temporal side of the eye point, when d is at least one value in the range of 1.00 to 2.00, for spectacle lenses.

[0015] A second aspect of the present invention is: The spectacle lens described in the first embodiment has a value of 1.50.

[0016] A third aspect of the present invention is: The spectacle lens according to the first or second embodiment, wherein the maximum width of the rectangular portion from the eye point to the nose in the horizontal direction is 3.60 mm or more.

[0017] A fourth aspect of the present invention is: A central clear region including the eye point, where a light beam incident from the object-side surface is directed out from the eye-side surface, enters the wearer's pupil, and converges onto the retina. An annular region surrounding the aforementioned central clear region, comprising a functional region that causes light beams incident from the object-side surface to exit from the eye-side surface, while preventing at least a portion of the light beams incident in the wearer's pupil from converging onto the retina, Equipped with, In a planar view, the shape of the central clear region is defined as a collection of all circles with a radius of 2.00 mm that can circumscribe the portion of the functional region that does not cause the light beam incident on the wearer's pupil to converge onto the retina, without including other such portions. In the central clear region, the shape on the temporal side and the shape on the nasal side are asymmetrical with respect to a vertical line passing through the eye point, and the maximum horizontal distance from the eye point to the nasal side is 3.60 mm or more.

[0018] A fifth aspect of the present invention is: The spectacle lens according to the fourth aspect, wherein at least one of the center of gravity of the shape of the center-side clear region and the midpoint of the horizontal line segment passing through the eye point in the shape of the center-side clear region is disposed on the nasal side of the eye point.

[0019] A sixth aspect of the present invention is a region including an eye point, comprising a center-side clear region that causes a light beam incident from the object-side surface to exit from the eyeball-side surface, enter the wearer's pupil, and converge on the retina, and an annular region surrounding the center-side clear region, which causes a light beam incident from the object-side surface to exit from the eyeball-side surface, while at least a part of the light beam incident on the wearer's pupil does not converge on the retina, a functional region; and is provided with In a plan view, the center-side clear region is a spectacle lens that protrudes toward the nasal side from the horizontal ear side when viewed from the eye point.

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[0024] In one embodiment of the present invention, the central clear region (and the base region within the functional region, and furthermore, the outer clear region) functions as a so-called fixed-focus lens.

[0025] The maximum width of the rectangular portion on the nasal side from the eye point may preferably be 4.00 mm or more.

[0026] When the envelope of the aggregate is shaped like the central clear region, the maximum distance from the eye point to the nasal side in the horizontal direction within that shape may preferably be 4.00 mm or more.

[0027] The aforementioned aggregate may be interpreted as the envelope of the aggregate.

[0028] One guideline for the lower limit of the size of the central clear area is that it should be large enough to encompass a circle with a diameter of 3.00 mm (or 4.00 mm, or 5.00 mm) centered on the eye point. One guideline for the upper limit of the size of the central clear area is that it should fit within a circle with a diameter of 10.00 mm centered on the eye point. The minimum horizontal distance from the eye point to the edge of the central clear area (or the minimum radius if the clear area is circular in plan view) may be 3.60 mm or less. The area of ​​the central clear area is 80 mm². 2 The following is also possible: The shape of the central clear area 2 may be circular, rectangular, elliptical, etc., in plan view.

[0029] One guideline for the lower limit of the functional area size is that it should be large enough to encompass a circumference of 12.50 mm in diameter centered on the eye point. One guideline for the upper limit of the functional area size is that it should be large enough to encompass a circumference of 50.00 mm in diameter centered on the eye point.

[0030] The functional region has an annular shape in plan view, and the ring may be circular, rectangular, elliptical, or a combination thereof on the inside (i.e., the boundary between the central clear region and the functional region) and / or on the outside (i.e., the boundary between the outer clear region and the functional region).

[0031] In the functional field, it may be defined as not focusing 30% or more (or 40%, 50%, or 60%) of the light beam entering the wearer's pupil onto the retina. A higher percentage is expected to increase the effect of inhibiting myopia or hyperopia progression, but visibility will decrease. The value of this percentage should be determined appropriately based on the balance between the effect of inhibiting myopia or hyperopia progression and visibility. The upper limit may be, for example, 70%.

[0032] In the functional area, the area of ​​the configuration (convex region, embedded structure) that provides a myopia or hyperopia progression suppression effect in a planar view may be defined as 30% or more (or 40% or more, 50% or more, or 60% or more) of the entire functional area.

[0033] The technical concept of the present invention is also reflected in a pair of spectacle lenses to which one aspect of the present invention is applied to the right-eye lens and the left-eye lens, respectively.

[0034] The technical concept of this invention is also reflected in eyeglasses in which the vicinity of the periphery of the eyeglass lens is cut based on a predetermined frame shape and then fitted into the frame. [Effects of the Invention]

[0035] According to one aspect of the present invention, a technology is available that provides good visibility even when viewing objects at close range when wearing eyeglass lenses having a clear region and a functional region. [Brief explanation of the drawing]

[0036] [Figure 1] Figure 1 is a schematic enlarged plan view illustrating (Nominal 1) relating to the central clear region of an eyeglass lens according to one aspect of the present invention. [Figure 2]Figure 2 is a schematic enlarged plan view illustrating (Nominal 2) relating to the central clear region of an eyeglass lens according to one embodiment of the present invention. [Figure 3] Figure 3 is a schematic plan view of a spectacle lens according to one aspect of the present invention, specifically <Specific Example 1>, before applying one aspect of the present invention. [Figure 4] Figure 4 is a schematic plan view of a spectacle lens according to one aspect of the present invention, specifically <Specific Example 1>, after applying one aspect of the present invention. [Figure 5] Figure 5 is a schematic plan view of a specific example 2 of an eyeglass lens according to one aspect of the present invention, before the application of one aspect of the present invention. [Figure 6] Figure 6 is a schematic plan view of a spectacle lens according to one aspect of the present invention, specifically <2>, after applying one aspect of the present invention. [Figure 7] Figure 7 is a schematic plan view of a spectacle lens according to one aspect of the present invention, specifically <3>, before applying one aspect of the present invention. [Figure 8] Figure 8 is a schematic plan view of a spectacle lens according to one aspect of the present invention, specifically <3>, after applying one aspect of the present invention. [Figure 9] Figure 9 is a schematic plan view of a spectacle lens according to one aspect of the present invention, specifically <Specific Example 4>, before applying one aspect of the present invention. [Figure 10] Figure 10 is a schematic plan view of an eyeglass lens according to one aspect of the present invention, specifically <4>, after applying one aspect of the present invention. [Modes for carrying out the invention]

[0037] Embodiments of the present invention will be described below. The following description based on the drawings is illustrative, and the present invention is not limited to the illustrated embodiments.

[0038] The spectacle lenses described herein have an object-facing surface and an eye-facing surface. The "object-facing surface" is the surface that faces the object when the spectacle lenses are worn by the wearer, and the "eye-facing surface" is the opposite surface, that is, the surface that faces the eye when the spectacle lenses are worn by the wearer. This relationship also applies to the lens substrate that forms the basis of the spectacle lenses. In other words, the lens substrate also has an object-facing surface and an eye-facing surface.

[0039] In this specification, the horizontal direction when wearing eyeglass lenses is defined as the X direction, the vertical direction (up and down) is defined as the Y direction, and the thickness direction of the eyeglass lenses, which is perpendicular to the X and Y directions, is defined as the Z direction. The Z direction is also the optical axis direction of the eyeglass lenses. To the wearer, the right is the +X direction, the left is the -X direction, upwards is the +Y direction, downwards is the -Y direction, the direction towards the object is the +Z direction, and the opposite direction (away from the wearer) is the -Z direction. In this specification, "planar view" refers to the state when viewed from the +Z direction to the -Z direction. Each figure in this application illustrates the case when viewing the right eye lens in a planar view, with the nasal direction being the +X direction and the temporal direction being the -X direction when the right eye lens is worn. Furthermore, if the functional area is provided only on the outermost surface on the eyeball side, the view from the -Z direction to the +Z direction may be considered as a planar view. Hereafter, when discussing "positions" such as the eye point and geometric center in eyeglass lenses, unless otherwise specified, it refers to the position in a planar view.

[0040] In this specification, "~" refers to a value greater than or equal to a predetermined value and less than or equal to a predetermined value.

[0041] <Eyeglass Lenses> An eyeglass lens according to one aspect of the present invention comprises a central clear region and a functional region.

[0042] The central clear region is a portion having a smooth surface shape that can realize the wearer's prescribed refractive power from a geometrical optical standpoint. The central clear region corresponds to the first refractive region in Patent Document 1, and may also be the base region provided at the lens center and its vicinity in the spectacle lens described in Figure 5 of Patent Document 4. Furthermore, the central clear region is a region that includes the eye point, and is the region in which the light beam incident from the object-side surface is emitted from the eyeball-side surface, incident into the wearer's pupil, and focused onto the retina.

[0043] In one embodiment of the present invention, the central clear region enables the realization of prescription powers (spherical power, astigmatism power, astigmatism axis, etc.). This spherical power may be the power to be corrected when looking straight ahead (at a distance of approximately 1m to infinity) (for example, distance power, which will be used as an example hereafter), or it may be the power to be corrected when looking at an intermediate object (1m to 40cm) or a near object (40cm to 10cm).

[0044] Furthermore, the central clear area does not contain any features intended to suppress the progression of myopia or hyperopia (e.g., defocus areas, convex and / or concave areas, embedded structures, etc.).

[0045] In one embodiment of the present invention, the central clear region (and the base region within the functional region, and furthermore, the outer clear region) functions as a so-called fixed-focus lens.

[0046] Incidentally, the wearer's prescription data is printed on the lens bag of the eyeglass lenses. In other words, if the lens bag is present, it is possible to identify the eyeglass lenses as belonging to the wearer based on their prescription data. Furthermore, eyeglass lenses are usually sold as a set with a lens bag. Therefore, eyeglass lenses that come with a lens bag also reflect the technical concept of this invention, and the same applies to the set of lens bag and eyeglass lenses.

[0047] The "eye point (EP)" is the position through which the line of sight passes when wearing eyeglass lenses and looking straight ahead. In one embodiment of the present invention, the geometric center of the eyeglass lens before it is fitted into a frame coincides with the eye point and also coincides with the prism reference point. Hereafter, an eyeglass lens before it is fitted into a frame will be used as an example of an eyeglass lens according to one embodiment of the present invention, but the present invention is not limited to this embodiment.

[0048] The eye point can be identified by referring to a remark chart or centration chart issued by the lens manufacturer.

[0049] The functional region is the area in which light beams incident from the object-side surface are directed outwards from the eye-side surface, while at least a portion of the light beam incident within the wearer's pupil is not focused onto the retina. In planar view, the functional region is an annular area surrounding the central clear region.

[0050] The entire annular functional region does not necessarily have a different surface shape (for example, one with an opaque finish like frosted glass) or internal embedded structure from the central clear region of the spectacle lens. For example, in the case where a convex region is provided in an island-like manner, as in the first refractive region of Patent Document 1, while a second refractive region that realizes the prescribed power (a base region that performs the same function as the central clear region) is provided around the convex region, the annular region including the base region and the convex region may be considered as the functional region.

[0051] Furthermore, regarding the functional region, as shown in Figure 1 of Patent Document 2, in an eyeglass lens in which convex regions are formed in a chain-like manner in an annular shape and multiple such chain-like rings are arranged radially, with the region where no convex regions are formed being the base region, the region between the smallest diameter chain-like ring and the largest diameter chain-like ring may be set as the functional region.

[0052] Furthermore, regarding the functional region, as shown in Figure 3B of Patent Document 3, the functional region may be defined as the annular region between the part closest to the eye point and the part furthest from the eye point EP when materials with different refractive indices are embedded inside the spectacle lens.

[0053] (Regulation 1) Figure 1 is a schematic enlarged plan view illustrating (Nomenclature 1) relating to the central clear region 2 of the spectacle lens 1 according to one embodiment of the present invention. In Figure 1, the structure of the functional region 3 adopted in <Specific Example 2> described later is used.

[0054] One feature of one aspect of the present invention is that, in a plan view, the maximum horizontal width of the rectangular portion within the central clear region 2, in the range between d[mm] above and d[mm] below the horizontal line passing through the eye point EP, is greater on the nasal side of the eye point EP than on the temporal side of the eye point EP, when d is at least one value in the range of 1.00 to 2.00.

[0055] The provisions described in the paragraph above take into consideration that when viewing near objects while wearing spectacle lens 1 according to one aspect of the present invention, the line of sight passes horizontally nasally from the eye point EP. d is a provision related to the line of sight and takes into consideration the radius of the pupil size PS. For example, if d[mm] is 2.00[mm], it means that the pupil radius is assumed to be 2.00[mm], i.e., the pupil diameter is assumed to be 4.00[mm]. Furthermore, the provisions described in the paragraph above mean that when moving the line of sight within the central clear area 2, the distance the line of sight can move is greater horizontally nasally than horizontally temporally from the eye point EP.

[0056] The value of d can be any one value within the range of 1.00 or more and 2.00 or less, and as exemplified in the paragraph above, it may be 2.00 or 1.50.

[0057] The maximum horizontal width of the rectangular portion on the nasal side from the eye point EP may be 3.60 mm or more (preferably 4.00 mm or more), and there is no upper limit. If an upper limit is to be defined, it is sufficient to apply the upper limit of the size of the central clear area 2 described later.

[0058] The distance from eye point EP to the nose should be greater than the distance from eye point EP to the ear, but the difference between the two distances can be in the range of, for example, 0.40 to 3.00 mm.

[0059] The difference between these two distances may be defined as a relative value. For example, the value obtained by taking the maximum horizontal width of the rectangular portion on the temporal side from the eye point EP as the denominator and the maximum width on the nasal side from the eye point EP as the numerator may be greater than 1.00 and less than or equal to 2.00. The lower limit of this value may be 1.20 or 1.40, and the upper limit may be 1.80 or 1.60.

[0060] In (Provision 1), a circle may be used instead of a rectangle (another embodiment of Provision 1). Specifically, in a plan view, in a circle with radius r [mm] whose center lies on a horizontal line passing through the eye point EP, within the central clear area 2, when r is set to at least one value in the range of 1.50 to 2.50, the provision that the maximum distance from the eye point EP to the center of the circle in the horizontal direction is greater on the nasal side than on the temporal side may be adopted. More specifically, a circle whose center lies on a horizontal line passing through the eye point EP may be assumed, with a circle α that can be positioned furthest to the temporal side in the horizontal direction within the central clear area 2, and a circle β that can be positioned furthest to the nasal side in the horizontal direction within the central clear area 2, and the provision that the distance β' between the center of circle β and the eye point EP is greater than the distance α' between the center of circle α and the eye point EP may be adopted. The value of r may be 2.00 or 1.50. Since the value of 2r is assumed to be the pupil diameter, in this specification, each of these circles is also called a clear pupil circle.

[0061] In (Regulation 1), when a circle is used instead of a rectangle, the maximum distance from the eye point EP to the center of the circle on the nasal side in the horizontal direction may be 1.60 mm or more (preferably 2.00 mm or more). Also, the maximum distance from the eye point EP to the nasal end of the circle on the horizontal direction may be 3.60 mm or more (preferably 4.00 mm or more). In either case, there is no upper limit. If an upper limit is to be specified, it is sufficient to apply the upper limit of the size of the central clear area 2 shown below.

[0062] In (Provision 1), when a circle is used instead of a rectangle, the difference between the maximum distance on the ear side and the maximum distance on the nasal side from the eye point EP to the center of the circle in the horizontal direction may be a value in the range of, for example, 1.00 to 3.00 mm.

[0063] The difference between these two distances may be defined as a relative value. For example, the value obtained by taking the maximum distance on the ear side from the eye point EP to the center of the circle in the horizontal direction as the denominator and the maximum distance on the nasal side as the numerator may be greater than 1.00 and less than or equal to 2.00. The lower limit of this value may be 1.20 or 1.40, and the upper limit may be 1.80 or 1.60.

[0064] (Provision 1) may be adopted in combination with (another form of Provision 1).

[0065] (Regulation 2) Figure 2 is a schematic enlarged plan view illustrating (Nominal 2) relating to the central clear region 2 of the spectacle lens 1 according to one embodiment of the present invention. In Figure 2, the structure of the functional region 3 adopted in <Specific Example 2> described later is used.

[0066] In one embodiment of the present invention, in a plan view, the shape of the central clear area 2 (i.e., the boundary line between the central clear area 2 and the functional area 3) may be defined as the envelope (indicated as EL1 in Figure 2) of a collection of circles with a radius of 2.00 mm (all with the same radius) that can circumscribe the portion of the functional area 3 that does not cause the light beam incident on the wearer's pupil to converge onto the retina, without including other such portions on the central clear area 2 side (one of which is the circle labeled as PS in Figure 2). Hereafter, the envelope will be used as an example, but the shape of the central clear area 2 may be defined as a "collection of clear pupil circles" rather than the envelope of a collection of clear pupil circles. In other words, the central clear area 2 may include the eye point EP and be composed of a collection of clear pupil circles.

[0067] In (Provision 2), when the envelope of the above-mentioned assembly is defined as the shape of the central clear region 2, the maximum distance from the eye point EP to the nasal side in the horizontal direction within that shape may be 3.60 mm or more (preferably 4.00 mm or more), and there is no upper limit. If an upper limit is to be defined, it is sufficient to apply the upper limit of the size of the central clear region 2 shown below.

[0068] In (Regulation 2), when the envelope of the aggregate is defined as the shape of the central clear region 2, the centroid GVC of the shape of the central clear region 2 may be positioned nasally to the eye point EP.

[0069] The above (regulation 2) is also one way of specifying the shape of the central clear area 2. Furthermore, by positioning the center of gravity GVC of the shape of the central clear area 2 on the nasal side of the eye point EP, the line of sight is more likely to pass through the central clear area 2 when the eyes converge. If the center of gravity GVC of the shape of the central clear area 2 is positioned horizontally on the nasal side when viewed from the eye point EP, the line of sight can more reliably pass through the central clear area 2 when the eyes converge.

[0070] Furthermore, if the midpoint of the horizontal line segment passing through eye point EP is positioned closer to the nose than eye point EP in the shape of the central clear area 2, then the line of sight can more reliably pass through the central clear area 2 when the eyes converge.

[0071] Whether the above-mentioned center of gravity GVC is used or the above-mentioned midpoint of the horizontal line segment is used, the horizontal distance from the eye point EP to the center of gravity GVC or midpoint may be a value in the range of, for example, 0.10 (or 1.00) to 3.00 mm.

[0072] The central clear region 2 defined in (Rule 2) is asymmetrical in shape on the ear side and shape on the nose side with respect to a vertical line passing through the eye point EP. For example, the shape of the central clear region 2 is such that on the ear side, it is half of a polygon with rounded corners (or a perfect circle or ellipse) shape A, while on the nose side, the remaining half of shape A extends horizontally towards the nose from the centroid GVC of shape A (in other words, it is extended).

[0073] The following provision encompasses all of the above and expresses one aspect of the present invention in a functional manner.

[0074] (Regulation 3) One feature of one aspect of the present invention is that, in a plan view, the central clear region 2 protrudes more towards the nose than towards the ear in the horizontal direction when viewed from the eye point EP.

[0075] In one embodiment of the present invention, by employing at least one of (No. 1), (No. 2), or (No. 3), when a wearer of the eyeglass lens 1 for suppressing the progression of myopia or hyperopia converges their eyes while looking at something close up, the light beam entering the wearer's pupil passes through the central clear region 2, causing the light beam to converge on the retina and resulting in good visibility.

[0076] Although the figures in this application illustrate the case where the right-eye lens is viewed from a planar perspective, one aspect of the present invention can also be applied to the left-eye spectacle lens 1. By applying one aspect of the present invention to the right-eye lens and the left-eye lens respectively, a pair of spectacle lenses can be obtained that suppresses myopia progression while also providing good visibility.

[0077] <Suitable examples and modified examples of eyeglass lens 1> Preferred examples and variations of the spectacle lens 1 in one aspect of the present invention are described below.

[0078] In the above (Provision 1), the entire annular functional region does not necessarily have a different surface shape of the spectacle lens (for example, one that is processed to scatter some light, such as frosted glass) or internal embedded structure from the central clear region. For example, in the case where a convex region is provided in an island-like manner, as in the first refractive region of Patent Document 1, while a second refractive region that realizes the prescribed power (a base region that performs the same function as the central clear region) is provided around the convex region, the annular region including the base region and the convex region may be considered as the functional region.

[0079] In the annular functional region, there may be configurations in which no convex regions, etc., are provided over a predetermined range of rotation angles when the +Y direction is considered to be zero degrees of rotation from the eye point EP. In such cases, for example, in the case of a lens for the right eye, there may be configurations in which no convex regions, etc., are provided over a range of rotation angles of several to more than ten degrees centered on 90 degrees clockwise (horizontally towards the nose). Even in such cases, as described above (Nomenclature 1), the maximum horizontal width of the rectangular portion within the central clear region, in the range between d[mm] above and d[mm] below the horizontal line passing through the eye point, remains larger on the nasal side from the eye point than on the temporal side from the eye point. Furthermore, the central clear region still protrudes more towards the nose than towards the temporal side in the horizontal direction from the eye point.

[0080] There are no limitations on the size and shape of the central clear area 2. One guideline for the lower limit of the central clear area 2's size is that it should be large enough to encompass a circle with a diameter of 5.00 mm centered on the eye point EP. One guideline for the upper limit of the central clear area 2's size is that it should fit within a circle with a diameter of 10.00 mm centered on the eye point EP. The minimum horizontal distance from the eye point EP to the edge of the central clear area 2 (or the minimum radius if the clear area is circular in plan view) may be 3.60 mm or less. The area of ​​the central clear area 2 is 80 mm². 2 The following is also possible: The shape of the central clear area 2 may be circular, rectangular, elliptical, etc., in plan view.

[0081] There are no limitations on the size and shape of functional area 3. One guideline for the lower limit of the size of functional area 3 is that it should be large enough to encompass a circumference of 15 mm in diameter centered on the eye point EP. One guideline for the upper limit of the size of functional area 3 is that it should be large enough to encompass a circumference of 50.00 mm in diameter centered on the eye point EP. The shape of functional area 3 is annular in plan view, and the ring may be circular, rectangular, elliptical, or a combination thereof on the inside (i.e., the boundary between the central clear area 2 and functional area 3) and / or on the outside (i.e., the boundary between the outer clear area 4 and functional area 3).

[0082] As a guideline, functional region 3 may be defined as not converging on the retina with 30% or more (or 40%, 50%, or 60%) of the light beam entering the wearer's pupil. A higher percentage is expected to increase the effect of inhibiting myopia or hyperopia progression, but visibility will decrease. The value of this percentage should be determined appropriately, taking into account the balance between the effect of inhibiting myopia or hyperopia progression and visibility.

[0083] Furthermore, in functional region 3, the area of ​​the configuration that provides a myopia or hyperopia progression suppression effect (convex region 3a, embedded structure) in a planar view may be defined as 30% or more (or 40% or more, 50% or more, or 60% or more) of the entire functional region 3. The upper limit may be, for example, 70%.

[0084] The spectacle lens 1 may include an outer clear region 4 that is in contact with the functional region 3 on the outer edge side, and which directs the light beam incident from the object-side surface to exit from the eye-side surface, enters the wearer's pupil, and converges on the retina. In that case, the functional region 3 becomes an annular region located between the outer clear region 4 and the central clear region 2.

[0085] As one way of defining the shape of the outer clear region 4, the way of defining the shape of the central clear region 2 (Nomenclature 2) may be used. That is, in a planar view, the outer clear region 4 may be defined as not including the eye point EP and being composed of a collection of clear pupil circles. Then, in the spectacle lens 1, the region other than the central clear region 2 and the outer clear region 4 may be defined as the functional region 3.

[0086] One specific embodiment for determining the shape of the outer clear region 4 is as follows: In a planar view, focus on the portion within the functional region 3 that does not cause the light beam incident on the wearer's pupil to converge onto the retina, and which is located furthest to the outer edge of the spectacle lens 1. Here, "the portion located furthest to the outer edge of the spectacle lens 1" refers to each portion that is radially furthest from the eye point EP in each range from 0 to 360 degrees in the circumferential direction. For each portion, the shape of the region sandwiched between the envelope EL2 of the collection of circles with a radius of 2.00 mm (all with the same radius) that can circumscribe around the outer edge of the spectacle lens 1 without including other portions may be defined as the shape of the outer clear region 4. Alternatively, the "collection of clear pupil circles" rather than the envelope of the collection of clear pupil circles may be defined as the shape of the outer clear region 4.

[0087] The outer clear region 4 may be annular, or it may be shaped to form only a part of the ring. In other words, a part of the functional region 3 may be in contact with the outer edge of the spectacle lens 1, and the other part of the functional region 3 may be in contact with the outer clear region 4. Furthermore, the spectacle lens 1 in one embodiment of the present invention may be the spectacle lens 1 after it has been framed, and a part of the functional region 3 in the spectacle lens 1 may be in contact with the outer edge of the spectacle lens 1, and the other part of the functional region 3 may be in contact with the outer clear region 4. It is not forbidden to provide another functional region 3 on the outer edge side of the outer clear region 4, but it is preferable that the entire outer edge side of the functional region 3 is the outer clear region 4, that is, that the outer edge side of the functional region 3 does not have a structure intended to provide a myopia or hyperopia progression suppression effect (e.g., a defocus region, a convex region 3a and / or a concave region, an embedded structure, etc.).

[0088] <An example of eyeglass lens 1> The arrangement of multiple defocus areas is not particularly limited and can be determined from perspectives such as visibility from outside the defocus area, design enhancement by the defocus area, and refractive power adjustment by the defocus area.

[0089] In the functional region 3 arranged around the central clear region 2 of the eyeglass lens 1, approximately circular defocus regions may be arranged in an island-like manner (i.e., separated from each other without being adjacent) at equal intervals in the circumferential and radial directions. As an example of the arrangement of defocus regions in a plan view, each convex region 3a is independently and discretely arranged such that its center becomes the vertex of an equilateral triangle (the center of each defocus region is located at the vertices of a honeycomb structure: hexagonal arrangement). In this case, the spacing between defocus regions may be 1.0 to 2.0 mm. The number of defocus regions may also be 100 to 100,000.

[0090] In functional area 3, one example of a configuration that provides a myopia or hyperopia progression suppression effect is the defocus area.

[0091] A defocus region is, from a geometrical optical standpoint, a region in which at least a portion is not focused to the focusing position of the base region 3b. A defocus region corresponds to the minute protrusion described in Patent Document 1. An eyeglass lens 1 according to one aspect of the present invention is a myopia progression suppressing lens, similar to the eyeglass lens described in Patent Document 1. Similar to the minute protrusion described in Patent Document 1, the multiple defocus regions according to one aspect of the present invention may be formed on at least one of the object-side surface and the eyeball-side surface of the eyeglass lens 1. In this specification, the case in which multiple defocus regions are provided only on the object-side surface of the eyeglass lens 1 is mainly illustrated. Hereafter, unless otherwise specified, the defocus region is illustrated as having a curved shape that protrudes toward the outside of the lens.

[0092] It is preferable that more than half of the multiple defocus regions (all defocus regions within the functional region) are arranged in the same period when viewed from above. An example of a pattern with the same period is an equilateral triangle arrangement when viewed from above (the centers of the defocus regions are located at the vertices of the equilateral triangle; a hexagonal arrangement is also possible). The direction of the period may be in the circumferential and / or radial direction. Preferably, it is 80% or more, more preferably 90% or more, and even more preferably 95% or more. Hereafter, preferred examples of "more than half of the total number of defocus regions within the functional region (or more than 80%)" will be listed in the same order of preference as above: 80% or more, 90% or more, 95% or more, and so on, without repeating.

[0093] The defocus region may be spherical, aspherical, toric, or a combination of these (for example, the center of each defocus region may be spherical, and the peripheral area outside the center may be aspherical). The boundary between the center and peripheral areas may be provided at 1 / 3 to 2 / 3 of the radius of the defocus region (or convex region 3a) in plan view. However, it is preferable that at least the center of the defocus region (or convex region 3a) is a convex curved surface that protrudes outward from the lens. Furthermore, since it is preferable that more than half of the multiple defocus regions (all defocus regions within the functional region) are arranged in the same period in plan view, it is preferable that the defocus regions are spherical.

[0094] Each defocus region is configured, for example, as follows. The diameter of the defocus region in plan view is preferably around 0.6 to 2.0 mm. The surface area of ​​each region is 0.50 to 3.14 mm. 2 It may be to a certain extent. The radius of curvature of the convex region 3a is spherical, with a radius of curvature of 50 to 250 mm, preferably about 86 mm.

[0095] In functional region 3, the proportion of the total area of ​​the defocus region to the total area of ​​the defocus region and base region 3b may be 20-60%.

[0096] While there are no specific numerical limits on the defocus power in each defocus region, it is preferable that, for example, the minimum defocus power produced by the defocus region on the spectacle lens 1 is within the range of 0.50 to 4.50 D, and the maximum value is within the range of 3.00 to 10.00 D. The difference between the maximum and minimum values ​​is preferably within the range of 1.00 to 5.00 D.

[0097] "Defocus power" refers to the difference between the refractive power of each defocused region and the refractive power of the parts outside each defocused region. In other words, "defocus power" is the difference obtained by subtracting the refractive power of the base portion from the average value of the minimum and maximum refractive powers at a predetermined point in the defocused region. In this specification, the case in which the defocused region is a convex region 3a is given as an example.

[0098] In this specification, "refractive force" refers to the average refractive force, which is the average value of the refractive force in the direction in which the refractive force is minimum and the refractive force in the direction in which the refractive force is maximum (perpendicular to that direction).

[0099] The lens substrate is formed from a thermosetting resin material such as thiourethane, allyl, acrylic, or epithio. However, other resin materials that can achieve the desired refractive index may be selected as the resin material constituting the lens substrate. Alternatively, an inorganic glass lens substrate may be used instead of a resin material.

[0100] The hard coat film is formed, for example, using a thermoplastic resin or a UV-curable resin. The hard coat film can be formed by immersing the lens substrate in a hard coat solution or by using a spin coat, etc. By coating the lens with such a hard coat film, the durability of the spectacle lens 1 can be improved.

[0101] The anti-reflective coating is formed by depositing an anti-reflective agent such as ZrO2, MgF2, or Al2O3 by vacuum deposition. This coating improves the visibility of the image seen through the spectacle lens 1.

[0102] As described above, multiple defocus regions are formed on the object-facing surface of the lens substrate. Therefore, when this surface is coated with a hard coat film and an anti-reflective film, multiple defocus regions are formed in the hard coat film and the anti-reflective film, following the defocus regions in the lens substrate.

[0103] In manufacturing eyeglass lenses 1, first, the lens substrate is formed by a known molding method such as casting polymerization. For example, by using a mold having a molding surface with multiple recesses and performing molding by casting polymerization, a lens substrate having a defocus region on at least one surface can be obtained. Next, once the lens substrate is obtained, a hard coat film is formed on its surface. The hard coat film can be formed by immersing the lens substrate in a hard coat solution or by using a spin coat, etc. After forming the hard coat film, an anti-reflective film is further formed on the surface of the hard coat film. The anti-reflective film can be formed by depositing the raw materials for the film by vacuum deposition. By manufacturing using this procedure, an eyeglass lens 1 is obtained having multiple defocus regions protruding toward the object on the object-facing surface.

[0104] The film thickness formed through the above process may be, for example, in the range of 0.1 to 100 μm (preferably 0.5 to 5.0 μm, and more preferably 1.0 to 3.0 μm). However, the film thickness is determined according to the function required of the film and is not limited to the range exemplified above.

[0105] It is also possible to form one or more additional coatings on top of the existing coating. Examples of such coatings include anti-reflective coatings, water-repellent or hydrophilic anti-fouling coatings, and anti-fogging coatings. Known techniques can be applied to the formation of these coatings.

[0106] <Glasses> The technical concept of the present invention is also reflected in eyeglasses in which the peripheral edge of the above-mentioned eyeglass lens 1 is cut based on a predetermined frame shape and fitted into the frame. There are no limitations on the type or shape of the frame, and it may be full-rim, half-rim, under-rim, or rimless.

[0107] The following are specific examples of eyeglass lenses 1 according to one aspect of the present invention. The present invention is not limited to the following specific examples.

[0108] <Specific Example 1> Figure 3 is a schematic plan view of a specific example 1 of the eyeglass lens 1 according to one aspect of the present invention, before applying one aspect of the present invention. Figure 4 is a schematic plan view of a spectacle lens 1 according to one aspect of the present invention after applying one aspect of the present invention to <Specific Example 1>.

[0109] The following spectacle lens 1 was fabricated. Note that spectacle lens 1 consists only of a lens substrate; no other materials are laminated onto the lens substrate. The prescribed refractive power was set to 0.00D for S (spherical refractive power) and 0.00D for C (astigmatic refractive power). • Diameter of the lens substrate in plan view: 60.00 mm • Lens substrate type: PC (polycarbonate) • Refractive index of lens substrate: 1.589 The above information is common to all specific examples, so it will be omitted from further discussion.

[0110] In this specific example, before applying one aspect of the present invention, the central clear area 2 was defined as a circular area with a radius of 3.50 mm from the eye point EP, and the functional area 3 was defined as a circular area with a radius of 20.00 mm from the lens center (excluding the central clear area 2). An outer clear area 4 was provided on the outer edge side of the spectacle lens 1, beyond the functional area 3.

[0111] In this specific example, the functional region 3 is assumed to be an opaque region, such as frosted glass, that has been processed over the entire functional region 3. On the other hand, the functional region 3 may also be an annular region including a base region 3b and a configuration intended to provide a myopia or hyperopia progression suppression effect (e.g., a defocus region, a convex region 3a and / or a concave region, an embedded structure, etc.).

[0112] Furthermore, by applying one aspect of the present invention, the central clear region 2 was extended horizontally toward the nose, and the shape of the central clear region 2 was stretched into an ellipse. Compared to before applying one aspect of the present invention, the central clear region 2 was stretched 1.00 mm toward the nose. As a result, the central clear region 2 protruded 1.00 mm toward the nose than toward the ear. Consequently, before applying one aspect of the present invention, the central clear region 2 was a perfect circle with a radius of 3.50 mm (diameter of 7.00 mm), but after applying one aspect of the present invention, the central clear region 2 became an ellipse with a vertical axis (minor axis) of 7.00 mm and a horizontal axis (major axis) of 8.00 mm.

[0113] This specific example satisfies the above (condition 1). Specifically, regardless of whether d was set to a value between 1.00 and 2.00, the maximum horizontal width of the rectangular portion of (condition 1) was 1.00 mm greater on the nasal side of the eye point EP than on the ear side of the eye point EP. This specific example also satisfies the above (another embodiment of condition 1).

[0114] In the shape of the central clear area 2 when the above (regulation 2) is adopted, the center of gravity GVC lies on a horizontal line passing through the eye point EP, the horizontal distance from the eye point EP to the center of gravity GVC is 0.50 mm, and the horizontal distance to the midpoint of the horizontal line segment passing through the eye point EP is 0.50 mm. For a pupil diameter of 4.00 mm, the maximum amount of inward movement (distance that can be moved towards the nose) in the central clear area 2 increased from 1.50 mm to 2.00 mm.

[0115] In this specific example, by applying one aspect of the present invention, the central clear region 2 can encompass not only the far pupil position PS1 but also the near pupil position PS2.

[0116] <Specific Example 2> Figure 5 is a schematic plan view of a specific example 2 of the eyeglass lens 1 according to one aspect of the present invention, before applying one aspect of the present invention. Figure 6 is a schematic plan view of a spectacle lens 1 according to one aspect of the present invention, after applying one aspect of the present invention to <Specific Example 2>.

[0117] In this specific example, the following configuration was adopted. • Functional region 3 configuration: Convex regions 3a are discretely arranged as defocus regions. Within functional region 3, everything except the convex regions 3a is the base region 3b. • Shape of convex region 3a: Spherical • Refractive force of convex region 3a: 3.50D • Formation surface of convex region 3a: Surface on the object side • Arrangement of convex regions 3a in plan view: Each convex region 3a is independently and discretely arranged such that its center becomes a vertex of an equilateral triangle (the center of each convex region 3a is located at the vertices of a honeycomb structure). • Shape of the convex region 3a in plan view: perfect circle (diameter 1.00 mm) • Pitch between each convex region 3a (distance between the centers of the convex regions 3a): 1.50 mm • Assuming the wearer's pupil diameter is 4.00mm.

[0118] In this specific example, before applying one aspect of the present invention, the central clear area 2 was defined as a circular area with a radius of approximately 3.45 mm from the eye point EP, and the functional area 3 was defined as a circular area with a radius of 20.00 mm from the center of the lens (excluding the central clear area 2). An outer clear area 4 was provided on the outer edge side of the spectacle lens 1, beyond the functional area 3.

[0119] Even if the method for specifying the shape of the central clear region 2 described above (Nomenclature 2) is applied, the central clear region 2 will have a shape outlined by the envelope of the collection of circumscribed circles for the convex region 3a of the functional region 3 (for example, the envelope EL1 in Figure 2) (the same applies to the following specific examples).

[0120] Furthermore, even if one embodiment for specifying the shape of the outer clear region 4 is applied using the embodiment for specifying the shape of the central clear region 2 (precedent 2), a functional region 3 can be obtained that is very close to the annular region described in the paragraph above (the same applies to the following specific examples). Strictly speaking, the outer boundary line of the functional region 3 shown in the figures for specific examples 2 and 3 (the envelope EL2, which is a dashed line) is not circular, but rather slightly convex toward the center of the circle in the part where the convex region 3a does not exist (the functional region 3 is concave), but in the figures, the envelope EL2 is shown as a circle as a schematic diagram.

[0121] Furthermore, by applying one aspect of the present invention, the central clear region 2 was extended horizontally toward the nose. Specifically, the two convex regions 3a located closest to the horizontal line passing through the eye point EP and closest to the eye point EP (the geometric center GC of the spectacle lens 1) were omitted before applying this aspect of the present invention. As a result, the shape of the central clear region 2 was extended horizontally toward the nose.

[0122] This specific example satisfies the above (condition 1). Specifically, when d is set to 1.50, the maximum horizontal width of the rectangular portion of (condition 1) was 1.30 mm greater on the nasal side of the eye point EP than on the ear side of the eye point EP. This specific example also satisfies the above (another embodiment of condition 1).

[0123] In the shape of the central clear area 2 when the above (regulation 2) is adopted, the centroid GVC lies on a horizontal line passing through the eye point EP, the horizontal distance from the eye point EP to the centroid GVC is approximately 0.4 mm, and the horizontal distance to the midpoint of the horizontal line segment passing through the eye point EP is 0.59 mm. For a pupil diameter of 4 mm, the maximum amount of inward movement (distance that can be moved towards the nose) in the central clear area increased from 1.51 mm to 2.70 mm.

[0124] In this specific example, by applying one aspect of the present invention, the central clear region 2 can encompass not only the far pupil position PS1 but also the near pupil position PS2.

[0125] <Specific Example 3> Figure 7 is a schematic plan view of <Specific Example 3> of an eyeglass lens 1 according to one aspect of the present invention, before applying one aspect of the present invention. Figure 8 is a schematic plan view of a spectacle lens 1 according to one aspect of the present invention, after applying one aspect of the present invention to <Specific Example 3>.

[0126] In this example, the following changes were made compared to Example 2.

[0127] The arrangement of the convex regions 3a in a plan view was changed. Specifically, the convex regions 3a were aligned horizontally and vertically. The pitch between each convex region 3a (distance between the centers of the convex regions 3a) was set to 1.25 mm.

[0128] In this specific example, before applying one aspect of the present invention, the central clear area 2 was defined as a circular area with a radius of 3.25 mm from the eye point EP, and the functional area 3 was defined as a circular area with a radius of 20.00 mm from the lens center (excluding the central clear area 2). An outer clear area 4 was provided on the outer edge side of the spectacle lens 1, beyond the functional area 3.

[0129] Furthermore, by applying one aspect of the present invention, the central clear region 2 was extended horizontally toward the nose. Specifically, before applying one aspect of the present invention, five convex regions 3a were omitted: one above and one below the horizontal line passing through the eye point EP and closest to the eye point EP (geometric center GC of the spectacle lens 1), one through which the horizontal line passes, and one above and one below in the adjacent row (arranged in the Y direction) that is closest to the horizontal line. As a result, the shape of the central clear region 2 was extended horizontally toward the nose.

[0130] This specific example satisfies the above (revision 1). Specifically, when d is set to 1.50 mm, the maximum horizontal width of the rectangular portion of (revision 1) was 1.25 mm greater on the nasal side of the eye point EP than on the ear side of the eye point EP. This specific example also satisfies the above (another embodiment of revision 1).

[0131] In the shape of the central clear area 2 when the above (regulation 2) is adopted, the centroid GVC lies on a horizontal line passing through the eye point EP, the horizontal distance from the eye point EP to the centroid GVC is approximately 0.4 mm, and the horizontal distance to the midpoint of the horizontal line segment passing through the eye point EP is 0.63 mm. With a pupil diameter of 4 mm, the maximum amount of inward movement (distance that can be moved towards the nose) in the central clear area increased from 1.25 mm to 2.50 mm.

[0132] In this specific example, by applying one aspect of the present invention, the central clear region 2 can encompass not only the far pupil position PS1 but also the near pupil position PS2.

[0133] <Specific Example 4> Figure 9 is a schematic plan view of <Specific Example 4> of an eyeglass lens 1 according to one aspect of the present invention, before applying one aspect of the present invention. Figure 10 is a schematic plan view of a spectacle lens 1 according to one aspect of the present invention, after applying one aspect of the present invention to <Specific Example 4>.

[0134] In this example, the following changes were made compared to Example 2.

[0135] The arrangement of the convex regions 3a in a plan view was changed. Specifically, the convex regions 3a were aligned in the circumferential direction. This alignment was performed for each diameter (for each distance from the eye point EP). The alignment status is shown in the table below. In the table below, the ring number is the number assigned to the circumferentially aligned group of convex regions 3a in order of proximity to the eye point EP, the radius is the radius of the ring, and the number of convex regions 3a is the number of convex regions 3a arranged on the ring. [Table 1]

[0136] In this specific example, before applying one aspect of the present invention, the central clear area 2 was defined as a circular area with a radius of 3.35 mm from the eye point EP, and the functional area 3 was defined as a circular area with a radius of 20.00 mm from the lens center (excluding the central clear area 2). An outer clear area 4 was provided on the outer edge side of the spectacle lens 1, beyond the functional area 3.

[0137] Furthermore, by applying one aspect of the present invention, the central clear region 2 was extended horizontally toward the nose. Specifically, in the convex region 3a on ring number 1 before applying one aspect of the present invention, three convex regions 3a were omitted: one above and one below the horizontal line passing through the eye point EP, and the one through which the horizontal line passes. This extended the shape of the central clear region 2 horizontally toward the nose.

[0138] This specific example satisfies the above (condition 1). Specifically, when d is set to 1.50, the maximum horizontal width of the rectangular portion of (condition 1) was 1.54 mm greater on the nasal side of the eye point EP than on the ear side of the eye point EP. This specific example also satisfies the above (another embodiment of condition 1).

[0139] In the shape of the central clear area 2 when the above (regulation 2) is adopted, the centroid GVC lies on a horizontal line passing through the eye point EP, the horizontal distance from the eye point EP to the centroid GVC is approximately 0.5 mm, and the horizontal distance to the midpoint of the horizontal line segment passing through the eye point EP is 0.72 mm. With a pupil diameter of 4 mm, the maximum amount of inward movement (distance that can be moved towards the nose) in the central clear area increased from 1.34 mm to 2.47 mm.

[0140] In this specific example, by applying one aspect of the present invention, the central clear region 2 can encompass not only the far pupil position PS1 but also the near pupil position PS2.

[0141] The technical scope of the present invention is not limited to the embodiments described above, and includes various modified and improved forms to the extent that specific effects can be obtained by the constituent elements of the invention or combinations thereof. [Explanation of Symbols]

[0142] 1. Eyeglass lenses 2. Clear area on the central side 3. Functional Domain 3a... Convex area 3b...Base area 4. Outer clear area EP... Eyepoint GC...geometric center GVC...center of gravity PS... Pupil size PS1...Distance pupil position PS2...Near pupil position EL1... (Envelope that forms the shape of the central clear region) EL2... (Envelope, which represents the boundary shape between the outer clear region and the functional region)

Claims

1. An eyeglass lens that provides a myopia progression suppression effect or a hyperopia reduction effect, The central clear region includes the eye point, which is the area through which the line of sight passes when the wearer is looking straight ahead while wearing eyeglass lenses, and where the light beam entering from the object-side surface is emitted from the eye-side surface, enters the wearer's pupil, and is focused onto the retina to achieve the wearer's prescribed refractive power. A functional region comprising an annular region surrounding the central clear region, having a base region that causes a light beam incident from the object-side surface to exit from the eye-side surface, enter the wearer's pupil, and converge on the retina to realize the wearer's prescribed refractive power, and a portion that causes a light beam incident from the object-side surface to exit from the eye-side surface, while preventing the light beam incident in the wearer's pupil from converging on the retina, Equipped with, In a plan view, the maximum horizontal width of a rectangular portion within the central clear region, in the range between d [mm] above and d [mm] below the horizontal line passing through the eye point, is greater on the nasal side of the eye point than on the ear side of the eye point, when d is at least one value in the range of 1.00 to 2.00, is the width of the portion on the nasal side of the eye point than on the ear side of the eye point.

2. The spectacle lens according to claim 1, wherein d is 1.

50.

3. The spectacle lens according to claim 1 or 2, wherein in the rectangular portion, the maximum width horizontally from the eye point toward the nose is 3.60 mm or more.

4. An eyeglass lens that provides a myopia progression suppression effect or a hyperopia reduction effect, The central clear region includes the eye point, which is the area through which the line of sight passes when the wearer is looking straight ahead while wearing eyeglass lenses, and where the light beam entering from the object-side surface is emitted from the eye-side surface, enters the wearer's pupil, and is focused onto the retina to achieve the wearer's prescribed refractive power. A functional region comprising an annular region surrounding the central clear region, having a base region that causes a light beam incident from the object-side surface to exit from the eye-side surface, enter the wearer's pupil, and converge on the retina to realize the wearer's prescribed refractive power, and a portion that causes a light beam incident from the object-side surface to exit from the eye-side surface, while preventing the light beam incident in the wearer's pupil from converging on the retina, Equipped with, In a plan view, the central clear region of the spectacle lens protrudes more towards the nose than towards the ear in the horizontal direction when viewed from the eye point.

5. An eyeglass lens according to any one of claims 1 to 4, comprising an outer clear region that is in contact with the functional region on the outer edge side of the eyeglass lens, and which causes a light beam incident from the object-side surface to be emitted from the eye-side surface, incident into the wearer's pupil, and focused onto the retina.

6. In the functional region, the spectacle lens according to any one of claims 1 to 5, wherein 30% or more of the light beam incident into the wearer's pupil is not focused onto the retina.

7. In a plan view, the central clear region is sized to fit within a circle with a diameter of 10.00 mm centered on the eye point, according to any one of claims 1 to 6.

Images