Spectacle lens and frame spectacles

Abstract

The present disclosure relates to an ophthalmic lens and frame eyeglasses, the ophthalmic lens comprising: an optical zone forming a base surface of the ophthalmic lens and having a prescription refractive power based on an eyeball and comprising a central optical zone; the control area surrounds the central optical area of the spectacle lens, the control area comprises a plurality of control subunits which are attached to one another, each control subunit is provided with a first lens located at the central position and a plurality of second lenses surrounding the first lens, the first lenses and the second lenses have different refractive powers, each second lens has a regular hexagonal surface shape, and each second lens has a regular hexagonal surface shape. At least a part of the second lenses in the plurality of control subunits are in surface contact through the surfaces where the edges of the regular hexagons are located, and connecting lines of the centers of the second lenses of the same control subunit form a rhombus. The filling rate of the out-of-focus control area of the spectacle lens is high, and the myopia control effect is good.

Description

Technical Field

[0001] The present disclosure relates to the field of ophthalmic devices, and more particularly to an eyeglass lens intended to be worn in front of a person's eyes to inhibit the development of eye abnormalities such as myopia or hyperopia. Background Art

[0002] Traditional lenses mainly seek to correct vision for eyes that already have refractive errors. This type of lens is used as a form of relief to solve the defects of the eyes. After people wear this type of lenses (such as single-vision lenses), their vision will inevitably deteriorate further (such as myopia further deepens). People hope to actively control refractive errors (such as myopia, hyperopia, etc.) to prevent further deterioration of vision. Therefore, spectacle lenses are developing new functional lenses with myopia control effects based on traditional single-vision lenses.

[0003] The representatives of early myopia slow control functional lenses are peripheral continuous defocus lenses, whose spherical refractive power at the periphery of the lens is higher than that in the central area of ​​the lens, such as rotationally symmetrical annular defocus lenses whose spherical refractive power gradually increases along each radial direction, non-rotationally symmetrical defocus lenses whose spherical refractive power gradually changes in different increasing ways along four mutually orthogonal directions, and progressive multifocal lenses whose spherical refractive power increases longitudinally from the upper part to the lower part of the lens. In this type of lens, the continuous change of the surface curvature is the main reason for the increase in spherical refractive power. This type of lens will have astigmatism aberration, which will lead to a decrease in the imaging quality of the lens.

[0004] For peripheral continuous defocus lenses, when users wear this type of lenses, if the eyes look at objects from the defocus area with increasing refractive power of the peripheral spherical lens, the visual effect will be much blurrier than using the central optical area of ​​the lens. When the eyes look at objects from the central optical area, the peripheral vision will also have a blurred peripheral vision effect because it passes through the peripheral defocus area. In addition, when patients wear this lens, the visual distortion and aberration will appear in the full field of view, causing discomfort to the wearer.

[0005] A new type of myopia control functional lens mainly adopts a peripheral discrete multi-point defocus design, in which a series of microlenses are dispersedly arranged around the lens according to a certain rule, and the positive addition of the microlenses is used to form a second refractive zone, such as disclosed in Chinese patents CN104678572A and CN113900275A. When the lens is imaging, the first refractive zone without microlenses has the conventional function of focusing the image on the retina of the eye. At the same time, the second refractive zone has the function of focusing the image in front of the retina of the eye, thereby inhibiting the development of myopia. In order to simultaneously image on the retina and in front of the retina, the microlenses adopt a specific layout. In order to improve the filling rate of the microlenses, CN113900275A also sets a special layout of "taking a first microlens as the center and surrounded by several second microlenses", which solves the problem of low filling rate of CN104678572A. However, the myopia control effect of the microlens layout disclosed in CN113900275A needs to be further improved. Utility Model Content

[0006] In view of the above-mentioned status of the eyeglasses according to the prior art, one of the objectives of the present disclosure is to provide an eyeglasses which further increases the filling rate of the defocused microlenses to improve the myopia control effect.

[0007] The object is achieved by disclosing a spectacle lens in the following form. The spectacle lens comprises an optical zone and a control zone. The optical zone is capable of providing a correction effect for the vision of patients with ametropia. The optical zone forms the base surface of the spectacle lens and has a refractive power based on the prescription of the eyeball, and the optical zone comprises a central optical zone located in the central area of ​​the spectacle lens. The control zone surrounds the central optical zone of the spectacle lens and comprises a plurality of control sub-units that fit each other. Each control sub-unit comprises a first lens located in a central position and a plurality of second lenses surrounding the first lens. The first lens and the second lens have different refractive powers. Each second lens has a regular hexagonal surface shape, and each second lens of at least a part of the plurality of control sub-units is in surface contact through the surface where the edge of the regular hexagon is located, and the connecting line of the centers of the second lenses of the control sub-unit forms a rhombus.

[0008] Compared with the conventional layout, the above-mentioned microlens layout enables the filling rate of the microlens to reach more than 70%. The visual experience that the patient can obtain after wearing the above-mentioned spectacle lenses is not inferior to the visual experience after wearing the spectacle lenses shown in CN104678572A. And because the filling rate is improved, the spectacle lenses according to the present disclosure have better myopia prevention and control effects.

[0009] Preferably, all the second lenses located at the inner edge of the control zone are oriented so that the boundary length L of the control zone is:

[0010] L = N*d.

[0011] Wherein, d is the side length of the second lens, and N is an integer not less than 75.

[0012] Preferably, the radius of the central optical zone is not greater than 7.5 mm, and the control subunits are arranged continuously and repeatedly at the inner boundary and adjacent to the inner boundary of the control zone.

[0013] Preferably, the diameter of the circumscribed circle of the second lens is selected from any value in the range of 1.25 mm to 1.42 mm.

[0014] Preferably, when the entrance pupil diameter is set to 3 mm, at the center position of the control subunit, the modulation transfer function of the control subunit at 20 lp / mm is in the range of 0.32-0.45, and the modulation transfer function at 30 lp / mm is in the range of 0.16-0.26.

[0015] Preferably, adjacent control subunits share all the second lenses whose centers are located on the same side length of the rhombus.

[0016] Preferably, the filling rate variation period L of the control subunit is Wherein, d is the side length of the second lens.

[0017] Preferably, the refractive powers of the second lenses in the same control subunit are the same.

[0018] Preferably, the second lens has an additional refractive power compared to the prescribed refractive power, and the additional refractive power is any value within the range of -5D to +5D.

[0019] Preferably, within the 6 mm aperture range at any position of the control area, the surface area of ​​all the second lenses accounts for no less than 70%, and the rate of change is less than 9%.

[0020] In addition, the present disclosure actually also relates to a pair of frame glasses, which comprises any one of the spectacle lenses described above.

[0021] Based on the common sense in the art, the above-mentioned preferred implementation modes can be arbitrarily combined to obtain the preferred embodiments of the present disclosure.

[0022] The spectacle lenses and frame glasses with the spectacle lenses of the disclosed design further increase the proportion of the area used for defocus myopia control (second lens), thereby improving the myopia prevention and control effect. At the same time, after the wearer wears the spectacle lenses (frame glasses), the eyes can obtain a clear field of vision when turning to various angles, and form a blurred vision around the fovea, thereby avoiding stimulation of eye axis growth. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to better understand the above and other purposes, features, advantages and functions of the present disclosure, reference may be made to the preferred embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present disclosure and have no limiting effect on the scope of the present disclosure, and the components in the drawings are not drawn to scale.

[0024] Figure 1 It is a structural schematic diagram of the front side of a spectacle lens in the prior art;

[0025] Figure 2 is a schematic structural diagram of the front side of a spectacle lens according to a preferred embodiment of the present disclosure;

[0026] Figure 3 yes Figure 1 A schematic diagram of the structure of a control subunit of a control area of ​​a spectacle lens;

[0027] Figure 4 yes Figure 2 A schematic diagram of the structure of a control subunit of a control area of ​​a spectacle lens;

[0028] Figure 5 is a schematic diagram of the optical path of the eyeglass lens according to the preferred embodiment of the present disclosure;

[0029] Figure 6 is a comparison diagram of the modulation transfer functions of the eyeglasses according to the present disclosure and the eyeglasses in the prior art. DETAILED DESCRIPTION

[0030] Next, the disclosed concept of the present disclosure will be described in detail with reference to the accompanying drawings. Described here are only preferred embodiments according to the present disclosure, and those skilled in the art may think of other ways to implement the present disclosure on the basis of the preferred embodiments, and the other ways also fall within the scope of the present disclosure. In the following specific description, directional terms such as "upper", "lower", "inner", "outer", "longitudinal", "horizontal", etc. are used with reference to the directions described in the accompanying drawings. The components of the embodiments of the present disclosure can be placed in a variety of different directions, and the directional terms are used for illustrative purposes and are not restrictive.

[0031] In the present disclosure, the spectacle lens 1 is a spectacle lens suitable for being worn in front of a person's eyes. The spectacle lens is not attached to the surface of the eyeball, but is mounted in front of the eye through a metal frame or a plastic material frame.

[0032] Figure 1 The front view of the spectacle lens in the prior art CN113900275A is shown. Figure 2shows a front view of an ophthalmic lens according to the present disclosure, Figure 1-2 Both correspond to the angle of view directly in front of the center of the lens.

[0033] Figure 1 The spectacle lenses in the invention correspond to the attached drawings of CN113900275A. Figure 1 In order to facilitate the description of the difference between the present application and the present application, the applicant has already Figure 1 , 2 The control area B of the drawing is colored accordingly. The first lens B1 in the drawing is colored gray, the second lens B2 is colored dark green, and the corresponding parts of the new spectacle lens proposed in the present application are colored the same. Figure 1-4 .

[0034] Unless otherwise specified, the "surface shape" in the present disclosure refers to the shape defined by the outer edge of the object as a whole or a local area of ​​the object when observed along the normal direction of the center of the object or a local area of ​​the object.

[0035] See also Figure 2 The eyeglass 1 according to the present disclosure shown includes an optical zone 10 and a control zone 20, etc. The optical zone 10 can provide correction for the vision of patients with refractive errors. The optical zone 10 of the eyeglass 1 is optionally made of PC or resin with a refractive index of 1.58 to 1.78 and suitable for use as the eyeglass 1. The optical zone 10 of the control zone 20 includes a central optical zone 11 located at the center of the eyeglass 1 and a peripheral optical zone 12 located at the periphery. For the optical zone 10 used for correcting vision, its surface is smooth and continuous. The base surface can be a rotationally symmetrical spherical form or an aspherical form, or it can be a non-rotationally symmetrical cylinder or a sphero-cylindrical surface. The non-rotationally symmetrical cylinder or sphero-cylindrical surface can have different curvatures in the four quadrants.

[0036] The control area 20 surrounds the central optical area 11 of the eyeglass lens 1, and the control area 20 includes a plurality of control subunits U that are attached to each other. Each control subunit U has a first lens 21 located at a central position and a plurality of second lenses 22 surrounding the first lens 21. The first lens 21 and the second lens 22 have different refractive powers. Each second lens 22 has a regular hexagonal surface shape, and at least a portion of the second lenses 22 of the plurality of control subunits U are in surface contact through the surface where the edges of the regular hexagon are located, and the connecting line of the centers of the second lenses 22 of the control subunits U forms a shape as shown in FIG. Figure 4 The rhombus is shown by the dashed line. In the example shown, the side length of the rhombus is Wherein, d is the side length of the second lens 22. The two groups of interior angles of the rhombus are 120° and 60° respectively.

[0037] Here, a plurality of control subunits U “fitting into each other” means that the control subunits U fit into each other in the circumferential direction or radial direction of the eyeglass lens 1 or fit into each other in both the circumferential direction and radial direction.

[0038] The control area 20 can form a uniform diffuse light spot, so that the wearer of the spectacle lens 1 forms a blurred peripheral visual image, thereby preventing the eyeball from being stimulated by the outside world.

[0039] It should be noted that, although not shown, the eyeglass lens 1 is actually provided with any form of mechanism or structure such as a groove, a through hole, a protrusion, etc. near its outer edge and / or at its outer edge for fixing it. These mechanisms or structures are used to fix the eyeglass frame, etc., which are not the innovation of the present disclosure. Whether these contents are disclosed or not does not affect the feasibility of the present disclosure. Here, this article does not elaborate on them.

[0040] contrast Figure 1 , 2 The control area B in the prior art and the control area 20 of the present application are shown in the figure. When the control areas B and 20 of the two are the same in area, Figure 1 The surface area of ​​all the second lenses B2 shown in FIG. 1 accounts for 67% of the surface area in the control area B. Figure 1 The surface area ratio (i.e., filling rate) of all second lenses 22 of the eyeglass lens 1 of the present application in the control area 20 can reach 75%. Due to the improved filling rate, the eyeglass lens 1 according to the present disclosure has a better myopia prevention and control effect.

[0041] According to the response of central visual pathway neurons and the construction theory of primary visual cortex in modern ophthalmology (hereinafter referred to as "theory one"), visual cells in the sensitive area of ​​the retinal fovea and its vicinity are more sensitive to stimulation of irregular corners. At the same time, the longer border of the central optical zone of the spectacle lens will also enhance the stimulation of visual cells, which requires the spectacle lens to set as long a border as possible in its central optical zone. According to Earl Smith's discovery (hereinafter referred to as "theory two"), the retina is more sensitive to defocused stimulating light within the range of 10°-20° of the foveal angle. Defocus design of the area corresponding to the wearer's foveal 10°-20° area on the spectacle lens will be more conducive to the wearer's myopia control. At the same time, Guo et al. pointed out in the One-year results of the Variation of Orthokeratology Lens Treatment Zone (VOLY) Study that a smaller (central) optical zone is more conducive to delaying the growth of the eye axis and is conducive to myopia control (hereinafter referred to as "theory three"). Among the various myopia control theories mentioned above, "Theory 1" requires that a central optical zone with a larger diameter and more tortuous borders be set in the eyeglasses; "Theory 2" requires that the defocus control area adjacent to the central optical zone (corresponding to the "control zone" of this application) is preferably within the 10°-20° area of ​​the foveal viewing angle; "Theory 3" requires that the diameter of the central optical zone should be set as small as possible; in addition, according to the requirement of clear vision of the human eye, the central optical zone of the frame glasses should not be set as small as possible (the specific size is related to the wearer's pupil diameter). There are conflicts between these theories. For example, if a smaller central optical zone is set according to the requirements of Theory 3, the border of the central optical zone will be shorter, and it may also cause unclear vision.

[0042] In order to reconcile the above-mentioned conflicting requirements, the present application designs the following optical zone form: all the second lenses 22 located at the inner edge of the control zone 20 are preferably oriented so that the boundary length L of the control zone 20 is N*d. Wherein, d is the side length of the second lens 22, and N is an integer not less than 75. At the same time, the radius of the central optical zone 11 of the eyeglass lens 1 is set to be no greater than 7.5 mm.

[0043] See also Figure 2 In this example, the diameter of the central optical zone 11 of the spectacle lens 1 is set to 7.2 mm, and the boundary length L of the central optical zone 11 (control zone 20) is 78 d. Figure 1 , 2 , when the diameters of the central optical zones A and 11 of both are set to 7.2 mm, Figure 1The boundary length L of the central optical zone A in the prior art design is only 54d. Therefore, according to the design of the present application, the boundary length of the central optical zone 11 / control zone 20 is greatly increased, and the number of corners increases, which will be beneficial to myopia control according to theory 1.

[0044] Here, the diameter of the central optical zone 11 refers to the diameter of the smallest inscribed circle defined by all the first lenses 21 and / or the second lenses 22 located at the inner edge of the control zone 20 .

[0045] Combination Figure 2 , 5 As shown in the figure, when the central optical zone 11 is set to 7.2 mm, the boundary of the central optical zone 11 (control zone 20) corresponds to a foveal viewing angle of 10.2°. At this time, the inner boundary of the control zone 20 is close to the lower boundary of the foveal viewing angle of the above-mentioned theory 2 (foveal 10° viewing angle). At this time, it is only necessary to set an appropriate number of control subunits U covering areas in the radial direction of the control zone 20 to cover the corresponding area of ​​the foveal viewing angle of 10-20°, so as to achieve the result that the myopic defocus control zone 20 is arranged in all the most sensitive areas of the retina. The specific number of the above-mentioned control subunits U can be determined according to Figure 5 Therefore, the central optical zone 11 of the above-mentioned form can cover the area corresponding to 10°-20° of the wearer's retinal fovea under the premise of designing the central optical zone 11 as small as possible.

[0046] It can be understood that when the diameter of the central optical zone 11 remains unchanged, the diameter of the central optical zone 11 is appropriately reduced. Figure 2 The side length of the second lens 22 shown in FIG. 2 is increased, the boundary length L of the control zone 20 will increase to a certain extent; conversely, the side length of the second lens 22 is increased, the boundary length L of the control zone 20 will decrease to a certain extent. When the side length of the second lens 22 remains unchanged, the diameter of the central optical zone 11 increases, the boundary length L of the control zone 20 will increase to a certain extent; conversely, the diameter of the central optical zone 11 decreases, the boundary length L of the control zone 20 will decrease to a certain extent. Therefore, the boundary length of the control zone 20 can be adjusted by adjusting the side length of the second lens 22 and / or the diameter of the central optical zone 11, so that the boundary length L of the control zone 20 is N*d, and N is not less than 75.

[0047] Preferably, if Figure 2 As shown, the control area 20 is arranged with continuous and repeated control subunits U at the inner boundary and adjacent to the inner boundary. When the wearer moves his eyes, his sight passes through different boundary areas of the control area 20 or his sight moves from the boundary area to the inside of the control area 20, and the wearer's visual sense difference is small, which reduces the dizziness caused by eye movement.

[0048] In the present application, the diameter of the circumscribed circle of the second lens 22 is selected from any value in the range of 1.25 mm to 1.42 mm, for example, it can be set to 1.35 mm, 1.38 mm, etc.

[0049] Preferably, when the entrance pupil diameter is set to 3 mm, at the center of the control subunit U, the modulation transfer function of the control subunit U at 20 lp / mm is in the range of 0.32-0.45, and the modulation transfer function at 30 lp / mm is in the range of 0.16-0.26. In the medium and low frequency range (0 lp / mm to 30 lp / mm), compared with the control area (control subunit) of the second lens B2 filling rate of 67% in the prior art, the MTF of the control area (control subunit) of the second lens 22 filling rate of 75% of the present application is lower, thereby generating a stronger defocus stimulus, which is more conducive to controlling the wearer's eye axis from growing.

[0050] Continue to see Figure 2 In a preferred embodiment, in the control area 20, adjacent control subunits U share all second lenses 22 whose centers are located on the same side length of the rhombus. That is, two adjacent control subunits U share the "side length" of the rhombus. On the basis of setting the size of the circumscribed circle of the second lens 22 to any value in the range of 1.25mm-1.42mm as described above, the side length of a second lens 22 is further selected so that within the 6mm aperture range at any position of the control area 20, the proportion of the surface area of ​​all second lenses 22 (i.e., the filling rate) is not less than 70%, and the rate of change is less than 9%. For example, the side length of the second lens 22 (first lens 21) is set to 1.38mm. At this time, within any 6mm aperture range of the control area 20, the filling rate varies from 70.3% to 78.8%. A smaller filling rate variation range allows the wearer to experience smaller visual changes when his / her line of sight passes through different positions of the control area 20, thereby reducing dizziness; while a larger filling rate is more conducive to slowing down the wearer's eye axis changes and preventing worsening of myopia / hyperopia.

[0051] Optionally, the filling rate variation period L of the control subunit U is set to Wherein, d is the side length of the second lens 22 .

[0052] Preferably, the refractive powers of the second lenses 22 in the same control subunit U are the same.

[0053] The second lens 22 has an additional refractive power compared to the prescribed refractive power, and the additional refractive power is any value within the range of -5D to +5D, for example, 3D, 3.5D, etc.

[0054] The lenses of the control unit 20 may be optionally arranged on the inner surface and / or the outer surface of the eyeglass 1. The first and second lenses may be prepared in the form of protruding and / or recessed from the surface of the eyeglass 1. The refractive power of the first lens 21 may be set to be the same as the refractive power of the central optical zone 11, or to have a refractive power difference of no more than 0.5D from the refractive power of the central optical zone 11.

[0055] It should be additionally explained that, for the eyeglass lens 1 of the present application, when the imaging wavefront passes through the control area 20, the wavefront will be spatially divided according to the distribution of each second lens 22, and the formed sub-wavefronts will produce corresponding phase delays (or advances) due to the additional refractive power of the second lens 22. All sub-wavefronts are eventually superimposed on the working focal plane corresponding to the base surface S in the same area on the retina. These sub-wavefronts will not form a common focus, thereby reducing the imaging quality on the retina and avoiding the occurrence of a second image plane in a spatial position outside the retina.

[0056] Under the premise of providing a peripheral blurred image, each second lens 22 can be optionally set to a spherical lens or an aspherical lens. The refractive power of the second lens 22 between different control sub-units U can be set to be the same or different, and the phase modulation effect generated by the corresponding control sub-units U on each sub-wavefront can be a mutually consistent phase delay amount (phase advance amount) or an inconsistent phase delay amount (phase advance amount).

[0057] The protection scope of the present disclosure is limited only by the claims. Thanks to the teachings of the present disclosure, those skilled in the art will easily recognize that alternative structures of the structures disclosed in the present disclosure can be used as feasible alternative embodiments, and the embodiments disclosed in the present disclosure can be combined to produce new embodiments, which also fall within the scope of the appended claims. Description of the drawings:

[0059] Central optical zone of prior art spectacle lenses: A.

[0060] Control area of ​​the eyeglass lens of the prior art: B.

[0061] Control subunit of eyeglasses in the prior art: u.

[0062] The first lens of the spectacle lens in the prior art: B1.

[0063] The second lens of the spectacle lens in the prior art: B2.

[0064] The novel eyeglass lens of the present application: 1.

[0065] Optical zone of the new spectacle lens:10.

[0066] Central optical zone of the new spectacle lens:11.

[0067] Peripheral optical zone of new spectacle lenses:12.

[0068] Control area of ​​the new eyeglass lens: 20.

[0069] Control subunit of the new eyeglass lens: U.

[0070] The first lens of the new spectacle lens: 21.

[0071] The second lens of the new spectacle lens: 22.

Claims

1. A spectacle lens, characterized in that: The spectacle lenses include: an optical zone forming a base surface of the eyeglass and having a prescription power based on an eyeball, the optical zone including a central optical zone located in a central area of ​​the eyeglass; and A control area, the control area surrounds the central optical area of ​​the eyeglass, the control area includes a plurality of control sub-units that are attached to each other, each control sub-unit has a first lens located at a central position and a plurality of second lenses surrounding the first lens, the first lens and the second lens have different refractive powers, each second lens has a regular hexagonal surface, and each of the second lenses of at least a part of the plurality of control sub-units is in surface contact with each other through a surface where an edge of the regular hexagon is located, and A line connecting the centers of the second lenses of the same control subunit forms a rhombus.

2. The spectacle lens according to claim 1, characterized in that: All the second lenses located at the inner edge of the control zone are oriented so that the boundary length L of the control zone is: L = N * d; Wherein, d is the side length of the second lens, and N is an integer not less than 75.

3. The spectacle lens according to claim 2, characterized in that: The radius of the central optical zone is no greater than 7.5 mm, and the control sub-units are arranged continuously and repeatedly at the inner boundary and adjacent to the inner boundary of the control zone.

4. The spectacle lens according to claim 3, characterized in that: The diameter of the circumscribed circle of the second lens is selected from any value in the range of 1.25 mm to 1.42 mm.

5. The spectacle lens according to claim 1, characterized in that: When the entrance pupil diameter is set to 3 mm, at the center position of the control subunit, the modulation transfer function of the control subunit at 20 lp / mm is in the range of 0.32-0.45, and the modulation transfer function at 30 lp / mm is in the range of 0.16-0.

26.

6. The spectacle lens according to any one of claims 1 to 5, characterized in that: Adjacent control subunits share all the second lenses whose centers are located on the same side length of the rhombus.

7. The spectacle lens according to any one of claims 1 to 5, characterized in that: The filling rate variation period L of the control subunit is Wherein, d is the side length of the second lens.

8. The spectacle lens according to claim 1, characterized in that: The refractive power of each of the second lenses in the same control subunit is the same.

9. The spectacle lens according to claim 1 or 8, characterized in that: The second lens has an additional refractive power compared to the prescribed refractive power, and the additional refractive power is any value within the range of -5D to +5D.

10. The spectacle lens according to claim 1, characterized in that: Within the 6 mm aperture range at any position of the control area, the surface area of ​​all the second lenses accounts for no less than 70%, and the rate of change is less than 9%.

11. A frame glasses, characterized in that: The frame glasses include the spectacle lenses according to any one of claims 1 to 10.

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