Spectacle lens with defocusing function and preparation method thereof

Abstract

The invention discloses a spectacle lens with a defocus function, and relates to the technical field of myopia prevention and control, comprising a split defocus spectacle lens, wherein a central optical zone is arranged on the defocus spectacle lens, and a far light zone, a near light zone, an inner light zone and an outer light zone are arranged on the defocus spectacle lens, the far light zone and the near light zone are respectively located above and below the central optical zone, the inner light zone and the outer light zone are respectively located on both sides of the central optical zone, the angle range of the far light zone is a fan-shaped zone of 30° to 150° in the counterclockwise direction along the horizontal radial line of the central optical zone, the angle range of the near light zone is a fan-shaped zone of 45° to 135° in the clockwise direction along the horizontal radial line of the central optical zone, two fan-shaped zones are formed between the far light zone and the near light zone, and the two fan-shaped zones are respectively the inner light zone and the outer light zone; myopia correction can be performed more comprehensively, and the defocus spectacle lens is made by adopting a split structure, so that the production of the defocus spectacle lens is simpler.

Description

Technical Field

[0001] The present invention relates to the technical field of myopia prevention and control, and in particular to a spectacle lens with a defocusing function and a preparation method thereof. Background Art

[0002] It is generally recognized in modern medicine that the growth of the human eye depends on the peripheral focusing regulation of the retina. The peripheral hyperopic defocus of the retina promotes the growth of the eye. Correcting the peripheral hyperopic defocus of the retina can control the growth of myopic eyeballs. The inner or outer area of ​​the traditional myopic lens is a concave lens of the same degree as the central area. While the concave lens in the central area of ​​the lens corrects the central myopic defocus of the retina, the concave lens in the inner and outer peripheral areas of the lens increases the peripheral hyperopic defocus of the inner and outer retina, promotes the growth of the eyeball and increases the degree of myopia. In this case, defocused lenses for correcting myopia for the inner and outer retina have appeared on the market, for example: Patent No.: CN201420413649.1, a utility model patent, discloses a peripheral defocused frame lens in the inner and outer areas, which belongs to myopia prevention and treatment glasses. Myopic eyes have a state of peripheral refractive asymmetry of the retina. Existing peripheral defocused lenses cannot eliminate this asymmetric state, and also aggravate or produce refractive anisometropia. The utility model prepares unequal correction degrees for the inner and outer functional areas, and the correction degree of the inner functional area is greater than that of the outer functional area, thereby eliminating or reducing the asymmetric refractive state of the retinal periphery. This peripheral defocus frame spectacle lens is used to correct the outer and inner retinal periphery hyperopic defocus, control the growth of myopic eyeballs, has a wide field of view, good wearing compliance, eliminates the asymmetric refractive state of the retinal periphery, restores the normal physiological optical state of the human eye, and effectively prevents and controls myopia in children and adolescents;

[0003] The above patent divides the lens into an inner functional area and an outer functional area. However, according to the unique physiological structure of the eyeball, the refraction of the eye is asymmetric in the upper, lower, left and right directions. Therefore, the above patent does not divide the hyperopia functional area and the myopia functional area, and does not have the hyperopia and myopia correction function, resulting in the defocus lens being unable to correct myopia better and more comprehensively. At the same time, the existing defocus lenses are of an integral structure, and their production method is that the defocus lenses are made of the same material to form an integral structure. In this method, since the materials are the same and the refractive power of the materials themselves is the same, it is difficult to process light zones with different refractive powers as a whole. It is necessary to adjust the curvature radius of each light zone during the subsequent polishing process to achieve the required refractive power, but the polishing requirements are high, and it is difficult to smoothly transition between light zones with large differences in refractive power, resulting in a large surface drop of the defocus lenses, affecting their normal use. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a lens with a defocus function, which can correct myopia more comprehensively. At the same time, the defocus lens is made of a split structure, which makes the production of the defocus lens simpler.

[0005] The objective of the present invention is achieved through the following technical solutions: a spectacle lens with a defocusing function, comprising a split defocusing spectacle lens, wherein a central optical zone is arranged on the defocusing spectacle lens, and a far optical zone, a near optical zone, an inner optical zone and an outer optical zone are arranged on the defocusing spectacle lens, wherein the far optical zone and the near optical zone are respectively located above and below the central optical zone, and the inner optical zone and the outer optical zone are respectively located on both sides of the central optical zone;

[0006] The angle range of the far light zone is a fan-shaped area of ​​30° to 150° counterclockwise along the horizontal axis of the central optical zone, and the angle range of the near light zone is a fan-shaped area of ​​45° to 135° clockwise along the horizontal axis of the central optical zone. Two fan-shaped areas are formed between the far light zone and the near light zone, and the two fan-shaped areas are respectively an inner light zone and an outer light zone.

[0007] Further, the defocus lens includes a lens body, the lens body is provided with a far sector-shaped groove, a far lens is fitted in the far sector-shaped groove, and the far lens forms the far light zone, the lens body is provided with a near sector-shaped groove, a near lens is fitted in the near sector-shaped groove, and the near lens forms the near light zone, the lens body is provided with an inner sector-shaped groove, an inner lens is fitted in the inner sector-shaped groove, and the inner lens forms the inner light zone, the lens body is provided with an outer sector-shaped groove, an outer lens is fitted in the outer sector-shaped groove, and the outer lens forms the outer light zone.

[0008] Furthermore, the distance fan-shaped groove, near fan-shaped groove, inner fan-shaped groove and outer fan-shaped groove are connected in sequence to form a closed circular ring, and a positioning piece is arranged inside the closed circular ring, and the positioning piece is used to locate the position of any one of the distance lens, near lens, inner lens and outer lens on the defocused eyeglass lens.

[0009] Furthermore, a glue injection hole is provided on the side wall of the defocused eyeglass lens, and the glue injection hole is communicated with the closed circular ring.

[0010] Furthermore, arc-shaped protrusions are provided on both sides of the distance lens and the near lens, and the arc-shaped protrusions are matched with the arc surface of the central optical zone.

[0011] Furthermore, the defocus lens includes a refractive compensation layer, a functional layer and a refractive correction layer, the functional layer is located between the refractive compensation layer and the refractive correction layer, the side of the refractive compensation layer away from the functional layer is a convex surface, and the side of the refractive correction layer away from the functional layer is a concave surface, and the functional layer is provided with multiple convex surfaces and multiple concave surfaces, the multiple convex surfaces form a continuous annular structure, and the multiple concave surfaces form a continuous annular structure, and the convex surfaces and the concave surfaces are staggered in the radial direction to form a continuous wavy structure.

[0012] Furthermore, the functional layer is made of resin material.

[0013] A method for preparing a spectacle lens with a defocusing function comprises the following steps:

[0014] S1, using a mold to obtain a lens body;

[0015] S2. using mold processing to produce a distance lens blank, a near lens blank, an inner lens blank and an outer lens blank of corresponding diopter;

[0016] S3, grinding and trimming the distance lens blank, the near lens blank, the inner lens blank and the outer lens blank;

[0017] S4, assembling the distance lens, the near lens, the inner lens and the outer lens onto the defocused spectacle lens;

[0018] S5, injecting resin glue into the defocused spectacle lens through the glue injection hole to adhere the distance lens, the near lens, the inner lens and the outer lens to the defocused spectacle lens to form a complete spectacle lens;

[0019] S6. Finely polish the surface of the lens.

[0020] A method for preparing a spectacle lens with a defocusing function comprises the following steps:

[0021] S1. Production of a refractive compensation layer and a refractive correction layer; a mold space is formed inside the mold, a functional molding part is arranged in the middle of the mold, and a plurality of convex parts and a plurality of concave parts are arranged on both end surfaces of the functional molding part, the plurality of convex parts form a continuous annular structure, the plurality of concave parts form a continuous annular structure, the convex parts and the concave parts are staggered in the radial direction to form a continuous wave-shaped structure, and the raw materials for molding the defocus eyeglass lens are injected into the mold space through the injection hole on the mold, thereby forming a semi-finished defocus eyeglass lens, and the semi-finished defocus eyeglass lens has an installation space for the functional layer;

[0022] S2, using the semi-finished defocused eyeglass lens as a functional layer manufacturing mold to form the functional layer in the installation space; placing the semi-finished defocused eyeglass lens in a shaping mold, the internal space shape of the shaping mold is adapted to the external shape of the semi-finished defocused eyeglass lens, the injection hole on the shaping mold is connected to the installation space, and resin is injected into the installation space through the injection hole on the shaping mold, and after curing, a functional layer is formed in the installation space of the semi-finished defocused eyeglass lens to manufacture a defocused eyeglass lens blank;

[0023] S3, finely grinding the defocused eyeglass lens blank in step S2 to form a defocused eyeglass lens.

[0024] The beneficial effects of the present invention are:

[0025] 1. Since the refractive powers of the distance light zone, near light zone, inner light zone and outer light zone are different, the defocus lens adopts a split design to form the distance light zone, near light zone, inner light zone and outer light zone. Each light zone is independent of each other to avoid astigmatism. At the same time, the various light zones of the defocus lens are reasonably divided to meet the physiological optical field needs of the human eye, and can correct myopia more comprehensively. At the same time, the defocus lens is made of a split structure, which makes the production of the defocus lens simpler.

[0026] 2. When installing the distance lens, near lens, inner lens and outer lens, quickly locate the position of one of the lenses through the positioning sheet, and then install the remaining lenses accordingly, so that the corresponding lens can be accurately installed in the corresponding light zone.

[0027] 3. Inject resin glue into the circular ring of the defocused eyeglass lens through the glue injection hole to fix each lens on the defocused eyeglass lens to achieve the installation of the split eyeglass lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front view of a spectacle lens with a defocusing function according to the present invention;

[0029] Figure 2 It is a side view of Example 1 of a spectacle lens with a defocusing function of the present invention;

[0030] Figure 3 It is a structural schematic diagram of a lens main body in a lens with a defocusing function according to the present invention;

[0031] Figure 4 It is a side view of the second embodiment of the eyeglass lens with defocusing function of the present invention;

[0032] Figure 5 Schematic diagram of the internal structure of the mold in the second embodiment of the present invention;

[0033] In the figure, 1-defocus lens, 2-central optical zone, 3-distant optical zone, 4-near optical zone, 5-inner optical zone, 6-outer optical zone, 7-distant lens, 8-near lens, 9-inner lens, 10-outer lens, 11-positioning piece, 12-lens body, 13-arc-shaped protrusion, 14-mold space, 15-refractive compensation layer, 16-functional layer, 17-refractive correction layer, 18-convex surface, 19-concave surface, 20-convex portion, 21-concave portion. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0035] The human eyeball is divided into a far vision zone, a near vision zone, an inner vision zone and an outer vision zone. Different vision zones have different refractive powers for light. In order to correct the myopia of different vision zones, defocus glasses are produced. The existing defocus glasses are manufactured in the following way: the defocus glasses are made of the same material to form an integral structure. In this way, since the materials are the same and the refractive powers of the materials themselves are the same, it is difficult to process light zones with different refractive powers as a whole. It is necessary to adjust the radius of curvature of each light zone during the subsequent polishing process to achieve the required refractive power. However, the polishing requirements are high, and it is difficult to smoothly transition between light zones with large differences in refractive power, resulting in a large surface drop of the defocus glasses, which affects their normal use. In view of the difficulty in manufacturing the integral defocus glasses in the prior art, the present application sets the defocus glasses as a split structure to reduce the difficulty in processing and manufacturing the defocus glasses. The present application provides two embodiments for the split structure of the defocus glasses. The present application provides a corresponding processing and preparation method according to the structure of the defocus glasses in the corresponding embodiments, which is as follows:

[0036] Embodiment 1: Figure 1 and Figure 3 As shown, a spectacle lens with a defocusing function comprises a defocusing spectacle lens 1, a central optical zone 2 is arranged on the defocusing spectacle lens 1, a far optical zone 3, a near optical zone 4, an inner optical zone 5 and an outer optical zone 6 are arranged on the defocusing spectacle lens 1, the far optical zone 3 and the near optical zone 4 are respectively located above and below the central optical zone 2, and the inner optical zone 5 and the outer optical zone 6 are respectively located on both sides of the central optical zone 2; Figure 1As shown, the angle range of the far optical zone 3 is a sector-shaped area of ​​30° to 150° counterclockwise along the horizontal radial line HM of the central optical zone 2, and the angle range of the near optical zone 4 is a sector-shaped area of ​​45° to 135° clockwise along the horizontal radial line HM of the central optical zone 2. Two sector-shaped areas are formed between the far optical zone 3 and the near optical zone 4, and the two sector-shaped areas are an inner optical zone 5 and an outer optical zone 6. The defocused eyeglass lens 1 is reasonably divided into optical zones according to the field of view of the human eyeball, so as to form the far optical zone 3, the near optical zone 4, the inner optical zone 5 and the outer optical zone 6 on the defocused eyeglass lens 1, so that The defocused spectacle lens 1 is more in line with the actual field of view of the glasses and can correct myopia more comprehensively; the area division of the distance light zone 3, the near light zone 4, the inner light zone 5 and the outer light zone 6 adopts a four-zone method: the symmetry axis dividing line is an imaginary line, and the simulated imaginary symmetry axis is based on the 315°-135° axis and the 225°-45° axis. The two axes intersect each other at the center of the retinal area and the optical center of the mirror field of view. The two symmetry axes divide the fundus retina into a central retina (CR) located in the central circular area and four symmetrical sector-shaped areas of the peripheral retina. The four fan-shaped areas are: the superior retina (SR), the inferior retina (IR), the inner retina (NR) and the outer retina (TR). The mirror field of view of the defocused eyeglass lens 1 is also divided into a circular central optical zone (CV) 2 located at the optical center and four quadrants distributed in the peripheral area, namely, the far vision zone (SV) 3, the near vision zone (IV) 4, the inner vision zone (NV) 5 and the outer vision zone (TV) 6. According to the principle of the mutual correspondence between the refractive retinas of the lens, the mirror circular central optical zone (CV) 2 corresponds to the central retina (CR), the far vision zone (SV) 3 in the peripheral area of ​​the mirror corresponds to the inferior retina (IR), and the inner vision zone (TV) 6 corresponds to the inner vision zone (NV). V)5 corresponds to the outer retina (TR), the mirror near zone (IV) 4 corresponds to the upper retina (SR), and the mirror outer optical zone (TV) 6 corresponds to the inner retina (NR). In design, in order to set different sizes of central optical zones 2 or different sizes of inner optical zones 5 and outer optical zones 6, the circumferential azimuth of each zone can be designed differently. For example, in this application, the angle range of the far optical zone 3 is enlarged, the angle range of the near optical zone 4 is reduced, and the angle range of the inner optical zone 5 is equal to the angle range of the outer optical zone 6, so as to correct myopia around the central optical zone 2. In specific implementation, the angle range of each optical zone can be adjusted according to the actual diopter of the wearer's glasses.

[0037] Furthermore, if Figure 1 and Figure 3As shown, the defocused spectacle lens 1 comprises a spectacle lens body 12, the spectacle lens body 12 is provided with a far sector groove, a far lens 7 is fitted in the far sector groove, and the far lens 7 forms a far light zone 3, the spectacle lens body 12 is provided with a near sector groove, a near lens 8 is fitted in the near sector groove, and the near lens 8 forms a near light zone 4, the spectacle lens body 12 is provided with an inner sector groove, an inner lens 9 is fitted in the inner sector groove, and the inner lens 9 forms an inner light zone 5, the spectacle lens body 12 is provided with an outer sector groove, an outer lens 10 is fitted in the outer sector groove, and the outer lens 10 forms an outer light zone 6, and the central optical zone 2 is arranged in the middle of the spectacle lens body 12, and the far lens 7, near lens 8, inner lens 9 and outer lens 10 on the defocused spectacle lens 1 are all of split structure, and are fixed by assembling and bonding. The defocused eyeglass lens 1 is fixed on the lens body 12, thereby forming the defocused eyeglass lens 1, the far-use fan-shaped groove, the near-use fan-shaped groove, the inner fan-shaped groove and the outer fan-shaped groove are connected in sequence to form a closed circular ring, and a positioning piece 11 is arranged in the closed circular ring, and the positioning piece 11 is used to locate the position of any one of the far-use lens 7, the near-use lens 8, the inner lens 9 and the outer lens 10 on the defocused eyeglass lens 1. In specific implementation, the positioning piece 11 can be arranged on the critical line between the far-use optical zone 3 and the inner optical zone 5, or on the critical line between the far-use optical zone 3 and the outer optical zone 6, or on the critical line between the inner optical zone 5 and the near-use optical zone 4, or on the critical line between the outer optical zone 6 and the near-use optical zone 4. The position of one of the lenses can be quickly located by the positioning piece 11, and then the remaining lenses can be installed accordingly, so that the corresponding lens can be accurately installed in the corresponding optical zone.

[0038] Furthermore, a glue injection hole is provided on the side wall of the defocused lens 1, and the glue injection hole is communicated with the closed circular ring. Resin glue is injected into the closed circular ring through the glue injection hole, and the resin glue flows into between the lenses under the action of pressure, so that each lens is bonded to the lens body 12 through the resin glue. Arc-shaped protrusions 13 are provided on both sides of the distance lens 7 and the near lens 8, and the arc-shaped protrusions 13 are adapted to the arc surface of the central optical zone 2. Through the arc-shaped protrusions 13, a bonding gap is generated between the distance lens 7 and the inner lens 9, a bonding gap is generated between the inner lens 9 and the near lens 8, a bonding gap is generated between the near lens 8 and the outer lens 10, and a bonding gap is generated between the outer lens 10 and the distance lens 7, so that the resin glue flows into the bonding gap, thereby improving the bonding effect; corresponding fan-shaped grooves are opened on the lens body 12 according to the curvature radius of each lens, so that after each lens is assembled on the lens body 12, the structural resin glue makes the surface of each lens transition smoothly, thereby reducing the drop between each lens.

[0039] In combination with the split structure of the defocus eyeglass lens in Example 1, a method for preparing an eyeglass lens with a defocus function is provided, comprising the following steps:

[0040] S1, using a mold to obtain a defocused eyeglass lens 1;

[0041] S2, using mold processing to make the distance lens 7 blank, the near lens 8 blank, the inner lens 9 blank and the outer lens 10 blank of corresponding diopter; because the distance lens 7, the near lens 8, the inner lens 9 and the outer lens 10 are made of different refractive materials, it is difficult to use the mold for overall processing, otherwise the melted materials will flow and mix in the mold, and thus the desired defocused eyeglass lens 1 cannot be made. After the distance lens 7, the near lens 8, the inner lens 9 and the outer lens 10 are separately set, the corresponding refractive lenses can be obtained by separate processing, thereby making the production of the defocused eyeglass lens simpler and faster;

[0042] S3, grinding and trimming the distance lens blank 7, the near lens blank 8, the inner lens blank 9 and the outer lens blank 10;

[0043] S4, assembling the distance lens 7, the near lens 8, the inner lens 9 and the outer lens 10 onto the defocused spectacle lens 1;

[0044] S5, injecting resin glue into the defocused eyeglass lens 1 through the glue injection hole to adhere the distance lens 7, the near lens 8, the inner lens 9 and the outer lens 10 to the defocused eyeglass lens 1 to form a complete eyeglass lens;

[0045] S6. Finely polish the surface of the lens.

[0046] Embodiment 2: Figure 1 , Figure 4 and Figure 5 As shown, a spectacle lens with a defocus function comprises a defocus spectacle lens 1, a central optical zone 2 is arranged on the defocus spectacle lens 1, a far light zone 3, a near light zone 4, an inner light zone 5 and an outer light zone 6 are arranged on the defocus spectacle lens 1, the far light zone 3 and the near light zone 4 are respectively located above and below the central optical zone 2, and the inner light zone 5 and the outer light zone 6 are respectively located on both sides of the central optical zone 2; the angle range of the far light zone 3 is a fan-shaped area of ​​30° to 150° counterclockwise along the horizontal radial line HM of the central optical zone 2, the angle range of the near light zone 4 is a fan-shaped area of ​​45° to 135° clockwise along the horizontal radial line HM of the central optical zone 2, and two fan-shaped areas are formed between the far light zone 3 and the near light zone 4, and the two fan-shaped areas are the inner light zone 5 and the outer light zone 6; as shown Figure 4As shown, the defocus eyeglass lens 1 comprises a refractive compensation layer 15, a functional layer 16 and a refractive correction layer 17, wherein the functional layer 16 is located between the refractive compensation layer 15 and the refractive correction layer 17, wherein the side of the refractive compensation layer 15 away from the functional layer 16 is a convex surface, and the side of the refractive correction layer 17 away from the functional layer 16 is a concave surface, and a central optical zone 2 is provided in the middle of the functional layer 16, and a plurality of convex surfaces 18 and a plurality of concave surfaces 19 are provided on the functional layer 16, wherein the plurality of convex surfaces 18 form a continuous annular structure, and the plurality of concave surfaces 19 form a continuous annular structure, and the convex surfaces 18 and the concave surfaces 19 are alternately arranged radially. In a specific implementation, the diopter of the convex surface 18 and the concave surface 19 in the far optical zone 3 is equal to the diopter of the far optical zone 3, the diopter of the convex surface 18 and the concave surface 19 in the near optical zone 4 is equal to the diopter of the near optical zone 4, the diopter of the convex surface 18 and the concave surface 19 in the inner optical zone 5 is equal to the diopter of the inner optical zone 5, and the diopter of the convex surface 18 and the concave surface 19 in the outer optical zone 6 is equal to the diopter of the outer optical zone 6. For example, if the diopter of the far optical zone 3 is relative to the central optical zone The positive addition of the diopter of the near optical zone 4 relative to the diopter of the central optical zone 2 is +0.50D to 3.00D; the positive addition of the diopter of the inner optical zone 5 relative to the diopter of the central optical zone 2 is +0.50D to 3.50D; the positive addition of the diopter of the outer optical zone 6 relative to the diopter of the central optical zone 2 is +0.2D to 2.50D, then the positive addition of the diopter of the convex surface 18 and the concave surface 19 of the functional layer 16 located in the far optical zone 3 relative to the diopter of the central optical zone 2 is +0.50D to 3.50D. +0.50D~3.00D, the positive addition of the refractive power of the convex surface 18 and the concave surface 19 of the functional layer 16 in the near optical zone 4 relative to the refractive power of the central optical zone 2 is +0.10D~3.50D, the positive addition of the refractive power of the convex surface 18 and the concave surface 19 of the functional layer 16 in the inner optical zone 5 relative to the refractive power of the central optical zone 2 is +0.50D~3.50D, and the positive addition of the refractive power of the convex surface 18 and the concave surface 19 of the functional layer 16 in the outer optical zone 6 relative to the refractive power of the central optical zone 2 is +0.20D~2.50D, the defocused eyeglass lens 1 is divided and arranged along the thickness direction, and the diopter of each optical zone meets the design requirements through the functional layer 16. Specifically, the diameters of the concave surface 19 and the convex surface 18 are kept consistent, and the refractive power is changed by changing the length of the convex arc of the concave surface 19 and the convex surface 18, thereby adjusting the diopter of the corresponding optical zone. At the same time, the curvature radius of the concave surface 19 and the convex surface 18 can also be changed to change the refractive power of the functional layer, which can also achieve the purpose of adjusting the diopter of the corresponding optical zone. For the purpose of the degree, parallel light rays are scattered by the concave surface 18, and finally imaged on the retina after being refracted by the inner surface of the refractive correction layer 17. This is the correction area. Parallel light rays are refracted by the convex surface 18, and finally imaged in front of the retina after being refracted by the inner surface of the refractive correction layer 17. This is the defocus area. Through the above settings, the parallel curves can realize the changes of the refraction position and the focus position of the light rays according to the predetermined tortuosity requirements of the convex surface 18 and the concave surface 19, and effectively realize the correction of hyperopia defocus and refractive error.

[0047] Furthermore, the functional layer 16 is made of a resin material, which has a low melting point and is easy to solidify and shape. At the same time, the refractive compensation layer 15 and the refractive correction layer 17 are made of the same material, and the melting point of the material is higher than the melting point of the resin, which is easy to process and shape later. The specific processing method is as follows:

[0048] A method for preparing a spectacle lens with a defocusing function is provided for the second embodiment, comprising the following steps:

[0049] S1, the preparation of the refractive compensation layer 15 and the refractive correction layer 17; Figure 5 As shown, a mold space 14 is formed inside the mold, an inner wall of the mold space 14 is provided with a curved surface that matches the convex surface of the refractive compensation layer 15, and another symmetrical inner wall is provided with a curved surface that matches the concave surface of the refractive correction layer 17. A functional molding part is provided in the middle of the mold, and an optical surface is provided in the middle of the functional molding part, so that a central optical zone 2 is formed in the center of the functional layer. Both end surfaces of the functional molding part are provided with a plurality of convex parts 20 and a plurality of concave parts 21, and the plurality of convex parts 20 form a continuous annular structure, and the plurality of concave parts 21 form a continuous annular structure. The convex parts 20 and the concave parts 21 are staggered in the radial direction to form a continuous wave-shaped structure. The raw materials for forming the defocus eyeglass lens are injected into the mold space 14 through the injection hole on the mold, so as to form a defocus eyeglass lens semi-finished product, and the defocus eyeglass lens semi-finished product has an installation space for the functional layer 16.

[0050] S2, using the semi-finished defocused eyeglass lens as a functional layer to make a mold, so as to form a functional layer 16 in the installation space; placing the semi-finished defocused eyeglass lens in a shaping mold, the shaping mold is divided into an upper mold and a lower mold, the internal space shape of the shaping mold is adapted to the external shape of the semi-finished defocused eyeglass lens, the injection mold hole on the shaping mold is connected to the installation space, and resin is injected into the installation space through the injection mold hole on the shaping mold, and after curing, a functional layer is formed in the installation space of the semi-finished defocused eyeglass lens to make a defocused eyeglass lens blank; in specific implementation, the refractive compensation layer 15 and the refractive correction layer 1 7 uses the same material, so as to ensure that the refractive compensation layer 15 and the refractive correction layer 17 can be molded at the same time in step S1. At the same time, the melting point of the material of the refractive compensation layer 15 is greater than the melting point of the resin. Therefore, when the functional layer 16 is molded, the molten resin will not melt the refractive compensation layer 15. Since the internal space shape of the shaping mold is compatible with the external shape of the defocus eyeglass blank, even if the injection of the resin softens the refractive compensation layer 15 and the refractive correction layer 17, it will not affect the external shape of the refractive compensation layer 15 and the refractive correction layer 17, thereby ensuring the processing quality of the defocus eyeglass.

[0051] S3, finely grinding the defocused eyeglass lens blank in step S2 to form a defocused eyeglass lens 1.

[0052] In summary, the present invention provides two structural embodiments of split-type defocused eyeglasses 1. Embodiment 1 does not have high requirements on the mold itself, and the mold is simple to manufacture, but has high requirements on assembly, and there are assembly errors and processing errors of each lens; Embodiment 2 has a functional molding part inside the mold that requires the mold itself, and the functional molding part is provided with multiple convex parts 20 and multiple concave parts 21 for making functional layers, which makes the manufacture of the mold itself difficult, but can indirectly form an integral defocused eyeglasses, reducing the assembly steps of the defocused eyeglasses, eliminating assembly errors and processing errors of each lens, and making the defocused eyeglasses 1 more accurate; therefore, users can select defocused eyeglasses with different split structures according to specific circumstances, and manufacture the defocused eyeglasses 1 of the present invention according to the corresponding preparation method.

[0053] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A spectacle lens with a defocusing function, characterized in that: The invention comprises a split defocus eyeglass (1), wherein a central optical zone (2) is arranged on the defocus eyeglass (1), and a far optical zone (3), a near optical zone (4), an inner optical zone (5) and an outer optical zone (6) are arranged on the defocus eyeglass (1), wherein the far optical zone (3) and the near optical zone (4) are respectively located above and below the central optical zone (2), and the inner optical zone (5) and the outer optical zone (6) are respectively located on both sides of the central optical zone (2); The angle range of the far light zone (3) is a fan-shaped area of ​​30° to 150° in the counterclockwise direction along the horizontal axis (HM) of the central optical zone (2), and the angle range of the near light zone (4) is a fan-shaped area of ​​45° to 135° in the clockwise direction along the horizontal axis (HM) of the central optical zone (2). Two fan-shaped areas are formed between the far light zone (3) and the near light zone (4), and the two fan-shaped areas are respectively an inner light zone (5) and an outer light zone (6); The defocused spectacle lens (1) comprises a spectacle lens body (12), the spectacle lens body (12) being provided with a far-view fan-shaped groove, a far-view lens (7) being adapted in the far-view fan-shaped groove, and the far-view lens (7) forming the far-view optical zone (3), the spectacle lens body (12) being provided with a near-view fan-shaped groove, a near-view lens (8) being adapted in the near-view fan-shaped groove, and the near-view lens (8) forming the near-view optical zone (4), the spectacle lens body (12) being provided with an inner fan-shaped groove, an inner lens (9) being adapted in the inner fan-shaped groove, and the inner lens (9) forming the inner optical zone (5), and the spectacle lens body (12) being provided with an outer fan-shaped groove, an outer lens (10) being adapted in the outer fan-shaped groove, and the outer lens (10) forming the outer optical zone (6); The far-field fan-shaped groove, the near-field fan-shaped groove, the inner fan-shaped groove and the outer fan-shaped groove are connected in sequence to form a closed circular ring, and a positioning piece (11) is arranged in the closed circular ring, and the positioning piece (11) is used to locate the position of any one of the far-field lens (7), the near-field lens (8), the inner lens (9) and the outer lens (10) on the defocused spectacle lens (1). A glue injection hole is provided on the side wall of the defocused spectacle lens (1), and the glue injection hole is connected to the closed circular ring. Both sides of the far-field lens (7) and the near-field lens (8) are provided with arc-shaped protrusions (13), and the arc-shaped protrusions (13) are adapted to the arc surface of the central optical zone (2).

2. The eyeglass lens with defocusing function according to claim 1, characterized in that: The defocus eyeglass lens (1) comprises a refractive compensation layer (15), a functional layer (16) and a refractive correction layer (17); the functional layer (16) is located between the refractive compensation layer (15) and the refractive correction layer (17); a side of the refractive compensation layer (15) away from the functional layer (16) is a convex surface; a side of the refractive correction layer (17) away from the functional layer (16) is a concave surface; a plurality of convex surfaces (18) and a plurality of concave surfaces (19) are arranged on the functional layer (16); the plurality of convex surfaces (18) form a continuous annular structure; the plurality of concave surfaces (19) form a continuous annular structure; the convex surfaces (18) and the concave surfaces (19) are arranged alternately in a radial direction to form a continuous wave-shaped structure.

3. The eyeglass lens with defocusing function according to claim 2, characterized in that: The functional layer (16) is made of resin material.

4. The method for preparing a spectacle lens with a defocusing function according to claim 1, characterized in that: The following steps are involved: S1, using a mold to obtain a lens body (12); S2, using mold processing to produce a distance lens (7) blank, a near lens (8) blank, an inner lens (9) blank, and an outer lens (10) blank of corresponding diopter; S3, grinding and trimming the distance lens (7) blank, the near lens (8) blank, the inner lens (9) blank, and the outer lens (10) blank; S4, assembling the distance lens (7), the near lens (8), the inner lens (9) and the outer lens (10) onto the defocused spectacle lens (1); S5, injecting resin glue into the defocused eyeglass lens (1) through the glue injection hole, so as to adhere the distance lens (7), the near lens (8), the inner lens (9) and the outer lens (10) to the defocused eyeglass lens (1) to form a complete eyeglass lens; S6. Finely polish the surface of the lens.

5. The method for preparing a spectacle lens with a defocusing function according to claim 2, characterized in that: The following steps are involved: S1. Production of a refractive compensation layer (15) and a refractive correction layer (17); a mold space (14) is formed inside the mold, a functional molding portion is provided in the middle of the mold, and a plurality of convex portions (20) and a plurality of concave portions (21) are provided on both end surfaces of the functional molding portion, the plurality of convex portions (20) form a continuous annular structure, the plurality of concave portions (21) form a continuous annular structure, the convex portions (20) and the concave portions (21) are staggered in a radial direction to form a continuous wave-shaped structure, and a defocus eyeglass molding raw material is injected into the mold space (14) through an injection hole on the mold, thereby forming a defocus eyeglass semi-finished product, and the defocus eyeglass semi-finished product has an installation space for the functional layer (16); S2, using the defocused eyeglass semi-finished product as a functional layer to make a mold for forming a functional layer (16) in the installation space; placing the defocused eyeglass semi-finished product in a shaping mold, wherein the shape of the internal space of the shaping mold matches the external shape of the defocused eyeglass semi-finished product, the injection mold hole on the shaping mold is connected to the installation space, and resin is injected into the installation space through the injection mold hole on the shaping mold. After curing, a functional layer is formed in the installation space of the defocused eyeglass semi-finished product, thereby manufacturing a defocused eyeglass blank; S3, finely grinding the defocused eyeglass lens blank in step S2 to form a defocused eyeglass lens (1).

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