CN217386033U - Spectacle lens and mold - Google Patents
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- CN217386033U CN217386033U CN202221308016.5U CN202221308016U CN217386033U CN 217386033 U CN217386033 U CN 217386033U CN 202221308016 U CN202221308016 U CN 202221308016U CN 217386033 U CN217386033 U CN 217386033U
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Abstract
The application discloses spectacle lens and mould belongs to lens design processing technology field. The spectacle lens comprises a mother lens, wherein the surface of the mother lens is provided with a design surface for correcting or reducing hyperopic defocus and astigmatism at the periphery of an naked eye retina; the design surface is rotationally and symmetrically distributed on the surface of the mother lens and is provided with an optical center which is superposed with the geometric center of the mother lens; the compound area is arranged on the surface of the mother lens and comprises a plurality of groups of annular belts; the annular belt comprises a micro lens for forming myopic defocus and a micro cylindrical lens for forming astigmatic defocus; the micro lenses and the micro cylindrical lenses are connected end to end, and the micro lenses and the micro cylindrical lenses of at least three groups of annular zones are alternately arranged in the radial direction along one radial direction of the mother lens. The mold comprises a first mold base and a second mold base for molding the surface of the female mirror. The application meets the requirement that any part of a hyperopic defocus function, a myopic defocus function and an astigmatic defocus function is reduced or corrected within the area range of the normal saccade pupil.
Description
Technical Field
The application relates to the technical field of lens design and processing, in particular to an eyeglass lens and a mold.
Background
The change of the peripheral refractive condition of the retina through the optical design of the lens can inhibit the growth of the eye axis of the teenagers, thereby slowing down the progression speed of the myopia, and the change becomes an optical method for intervening the myopia of the teenagers, which is recognized in recent years. Particularly, the lens which adopts the micro-lens form to arrange a sufficient amount of myopic defocus on the periphery of the retina has better clinical effect than the traditional concentric circular continuous defocus lens.
In the existing spectacle lens which utilizes a micro-lens structure to superpose a hyperopic out-of-focus correction design, the hyperopic out-of-focus effect of a non-micro-lens area is compensated by utilizing the refractive power formed by the micro-lens and the hyperopic out-of-focus design superposition design, but sufficient astigmatism out-of-focus intervention exceeding the astigmatism out-of-focus amount of naked eyes is not involved aiming at the periphery of a retina, so that the spectacle lens with the structure cannot meet the requirement of reducing or correcting the hyperopic out-of-focus function, the myopic out-of-focus function and the astigmatism out-of-focus function in the normal saccadic area range of the pupil.
Disclosure of Invention
The purpose of the invention is as follows: the embodiment of the application provides an eyeglass, which is suitable for an out-of-focus eyeglass; another embodiment of the present application provides a mold for preparing the above out-of-focus spectacle lens.
The technical scheme is as follows: the embodiment of the application provides an eyeglass, includes:
the surface of the primary lens is provided with a design surface for correcting or reducing hyperopic defocus and astigmatism on the periphery of the naked eye retina; the design surface is rotationally and symmetrically distributed on the surface of the primary mirror and comprises an optical center, and the optical center is superposed with the geometric center of the primary mirror;
the compound area is arranged on the surface of the mother mirror and comprises a plurality of groups of annular belts; the annular belt comprises a micro lens for forming myopic defocus and a micro cylindrical lens for forming astigmatic defocus, and the micro lens and the micro cylindrical lens are connected end to end; in each group of the ring zones, the adjacent microlenses are connected through the micro cylindrical lens;
the micro lenses and the micro cylindrical lenses of at least three groups of the ring belts are alternately arranged in the radial direction along one radial direction of the mother mirror.
In some embodiments, in one zone, the microlenses and the micro-cylinders are connected in a staggered distribution, and the staggered distribution may also include connecting a plurality of microlenses and then connecting the micro-cylinders, and the specific staggered distribution is subject to actual design.
In some embodiments, the parent mirror comprises an anterior surface and a posterior surface, the design face being located on the anterior surface or the posterior surface; the composite area is arranged at the same side or different sides of the design surface.
In some embodiments, the design face and the compound region are on the same side of the parent mirror; or the design surface and the compound area are respectively positioned on the surfaces of the two sides of the mother mirror.
In some embodiments, the design surface is formed by adopting a design for reducing the decentration of the hyperopic defocus in the peripheral part of the retina of the mother lens, the optical power of the design surface is any one-point defocus amount generated by changing along the optical center to the radial direction of the mother lens, and the design surface has the function of reducing or correcting the hyperopic defocus and the astigmatism existing on the periphery of the retina of a wearer after wearing the glasses; the change includes a decreasing or increasing trend.
In some embodiments, the defocus amount comprises an average of average power variationsPositive defocus D Female Astigmatism defocus C formed by astigmatism variation Female ；
And is
Wherein R is 1 And R 2 Respectively the maximum curvature radius and the minimum curvature radius at a certain point on the surface of the female mirror, n is the refractive index of the female mirror, D 0 Is the prescribed optical power of the optical center.
In some embodiments, the average forward defocus amount ranges from 0.80D to 2.00D; c of said astigmatic defocus Female Less than or equal to the average forward defocus amount D Female . D denotes diopter is the unit of magnitude of refractive power.
In some embodiments, the design curved surface of the microlens is a spherical surface or an aspherical surface having a positive defocus amount; the design curved surface of the micro-cylindrical lens is a toroidal curved surface or a toroidal curved surface, and the axial direction of the astigmatism at any point on the micro-cylindrical lens is the same as the axial direction of the astigmatism at the same position on the parent lens.
In some embodiments, the microlenses have sub-positive defocus amounts, and the sub-positive defocus amount of a single microlens is greater than or equal to 2.50D; the micro-cylindrical lens has sub-astigmatism defocusing amount, and the sub-astigmatism defocusing amount of a single micro-cylindrical lens is more than 1.0D. The sub positive defocusing amount of the micro lens is superposed with the average positive defocusing amount of the design surface, and the sub astigmatism defocusing amount of the micro cylindrical lens is superposed with the astigmatism defocusing amount of the design surface.
In some embodiments, the diameter of the microlens is 0.8-2 mm; the arc length of the micro-cylindrical lens is 1-4 mm, and the radial diameter of the micro-cylindrical lens is 0.6-2 mm.
In some embodiments, the radial direction of the primary mirror specifically refers to a direction extending from the geometric center of the primary mirror to the edge of the primary mirror, and a plurality of groups of annular zones are distributed in one radial direction, and at least three groups of adjacent annular zones are arranged alternately so as to satisfy the requirement of arranging the micro lenses and the micro cylindrical mirrors, wherein the arrangement mode can be micro lenses, micro cylindrical mirrors, micro lenses or micro cylindrical mirrors, micro lenses and micro cylindrical mirrors; by the arrangement mode, the requirement that the micro lens and the micro cylindrical lens are always seen simultaneously in the normal saccadic area range of the pupil can be met, and the requirements of reducing or correcting each part of the functions of hyperopic defocus, myopic defocus and astigmatic defocus are met; regarding the eye as a system consisting of a single medium and a refracting surface, wherein n is the refractive index, R is the curvature radius of the refracting surface of the eyeball, h is the lens distance, d is the pupil diameter, l is the eye axis length, R is the radius of the light ray mapping in the lens area, and S is the area of the peripheral area of the lens in the saccade area of the pupil diameter, then the following requirements are met:
in some embodiments, the inner diameter of the annulus nearest the optical center is 4-7 mm from the optical center; the distance between the outer diameter of the annular belt farthest from the optical center and the optical center is 15-35 mm; the distance between two adjacent annular belts is 0.5-2 mm.
In some embodiments, the annulus is a closed annulus or a non-closed annulus.
In some embodiments, the annulus is polygonal or circular; at least 5 annular belts are arranged.
In some embodiments, the microlenses are circular and the micro-cylindrical lenses are circular or cylindrical.
In some embodiments, a mold for preparing the out-of-focus spectacle lens is provided, comprising a first mold holder and a second mold holder for molding a surface of the female lens.
In some embodiments, the working surface of the first die holder is concave and the working surface of the second die holder is convex; the concave surface is provided with a cavity for molding the girdle, a first groove for molding the micro lens and a second groove for molding the micro lens are arranged in the cavity, and the first groove and the second groove are alternately connected.
In some embodiments, the first mold base and the second mold base are made of metal materials, and the glasses lens required by the wearer is manufactured by an injection molding process; or the first die holder and the second die holder are made of glass materials, and the glasses lenses required by the wearer are manufactured by a pouring forming process.
In some embodiments, the ophthalmic lens blank is formed by injection molding or cast molding through a metal or glass mold and the rear surface of the blank is machined via the garage to form the lens desired by the wearer.
In some embodiments, an ophthalmic lens blank is formed by a UV light curing process through metal and glass molds, and the surface of the blank is then machined via the garage to form the desired ophthalmic lens for the wearer.
In some embodiments, the ophthalmic lens patch is formed by a UV light curing process through a metal and glass mold followed by a lens or lens blank formed by a lamination process.
In some embodiments, the material of the primary mirror includes a polymer material or an inorganic non-metal material. Wherein, the high molecular material comprises thermoplastic resin or thermosetting resin, and the inorganic non-metallic material comprises glass and the like. The thermoplastic resin includes polycarbonate or polymethyl methacrylate; the thermosetting resin includes any one of acrylic resin, episulfide resin, thiourethane resin, allyl resin, and polyurethane.
In some embodiments, a coating film is formed on a surface of at least one side of the mother mirror, and the coating film includes a transparent coating film for increasing transmittance of the lens, a hard coating film for increasing durability of the lens, a reflective film for blocking harmful light, an antireflection film for realizing visibility of image formation, a polarizing film having a color change function, or other color change films doped with a material sensitive to ultraviolet rays, and the like.
In some embodiments, the cover film itself may have different colors, and the visible color in the case of light reflection may be green, blue, yellow, purple, etc., or other colors.
Has the advantages that: compared with the prior art, the spectacle lens comprises a mother lens, wherein the surface of the mother lens is provided with a design surface for correcting or reducing hyperopic defocus and astigmatism on the periphery of an naked eye retina; the design surface is rotationally and symmetrically distributed on the surface of the mother lens and comprises an optical center, and the optical center is superposed with the geometric center of the mother lens; the compound area is arranged on the surface of the mother lens and comprises a plurality of groups of annular belts; the annular belt comprises a micro lens for forming myopic defocus and a micro cylindrical lens for forming astigmatic defocus, and the micro lens and the micro cylindrical lens are connected end to end; in each group of ring zones, adjacent micro lenses are connected through the micro cylindrical lenses, and the micro lenses and the micro cylindrical lenses of at least three groups of ring zones are alternately arranged in the radial direction along one radial direction of the mother lens. Through the clitellum that constitutes at the microlens of mother's mirror surface configuration alternate connection and microcolumn, can superpose with the defocus volume that the design face produced, thereby produce the forward defocus volume of sufficient and astigmatism defocus volume, can continue original concentric circular continuous defocus lens cover the lens universe, guarantee the reduction hyperopia defocus of good adaptability and astigmatism defocus the function simultaneously, through other region, under the prerequisite that does not produce great influence to the adaptability of lens, to lens periphery superpose the disposition sufficient, can produce myopia out-of-focus and astigmatism out-of-focus stimulus function of the overkill positive compensation to hyperopia out-of-focus and astigmatism out-of-focus defect that the naked eye retina periphery itself exists, thereby make the person of wearing the glasses obtain more comprehensive optical signal of induction axis of the eye reverse development, inhibit the axis of the growth of teenagers better. In a radial direction of the mother lens, at least three groups of the annular micro lenses and the micro cylindrical lenses are alternately arranged in the radial direction, which meets the requirement that parts of the functions of reducing or correcting the hyperopic defocus, the myopic defocus and the astigmatic defocus always exist in the normal saccadic area range of the pupil. The mould of this application can adapt to different materials and technology and prepare out of focus lens through set up in the recess that microlens and little cylinder mirror correspond on the die holder, and whole forming process is simple, effectively improves the yields of lens.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a side view of a spectacle lens out of focus provided in an embodiment of the present application;
fig. 2 is a front structure view of a spectacle lens out of focus provided in an embodiment of the present application;
FIG. 3 is a schematic view of the cuff structure provided in an embodiment of the present application;
FIG. 4 is a front view of another out-of-focus spectacle lens provided in the embodiments of the present application;
FIG. 5 is a schematic view of a layout of a design surface provided in an embodiment of the present application;
FIG. 6 is a schematic diagram showing the variation of the mean defocus and the astigmatic defocus in each radial direction of the parent mirror provided in the embodiment of the present application;
FIG. 7 is a schematic view of an exemplary embodiment of the present disclosure;
FIG. 8 is a schematic structural diagram of a system formed by a single medium and refractive surfaces provided in an embodiment of the present application;
FIG. 9 is a schematic view of a cuff non-closed configuration provided in an embodiment of the present application;
FIG. 10 is a schematic view of a circular micro-cylinder structure provided in an embodiment of the present application;
FIG. 11 is a schematic view of a polygonal annulus configuration provided in an embodiment of the present application;
FIG. 12 is a schematic view of a second die holder provided in an embodiment of the present application;
fig. 13 is a schematic structural diagram of a first module provided in the embodiment of the present application;
FIG. 14 is an enlarged view of a portion of FIG. 13 at C;
reference numerals: 101-primary mirror, 102-optical center, 103-compound region, 104-annulus, 105-design surface, 1011-front surface, 1012-rear surface, 1041-microlens, 1042-micro-cylindrical lens, 201-first die holder, 202-second die holder, 203-concave surface, 204-convex surface, 205-cavity, 206-first groove, 207-second groove.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implying that the number of indicated technical features is indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, the spectacle lens comprises a mother lens 101, the mother lens 101 comprises a front surface 1011 and a back surface 1012, a design surface 105 for correcting or reducing the peripheral hyperopic defocus and astigmatism of the naked eye retina is arranged on the front surface 1011 or the back surface 1012, and the mother lens 101 with the design for reducing the decentration of the peripheral hyperopic defocus is formed; the design surface 105 has an optical center 102, the optical center 102 coinciding with the geometric center of the parent mirror 101, the optical center 102 functioning to provide the prescribed optical power; the composite region 103 is provided on the front surface 1011 of the mother mirror 101, and the composite region 103 is concentrically arranged on the front surface 1011 around the optical center 102.
Referring to fig. 2, the compound zone 103 includes a plurality of annular zones 104, the annular zones 104 are arranged along the radial direction of the mother lens 101, the annular zones 104 include microlenses 1041 for forming myopic defocus and micro cylindrical lenses 1042 for forming astigmatic defocus, the microlenses 1041 and the micro cylindrical lenses 1042 are alternately connected, wherein the inner diameter of the annular zone 104 closest to the optical center 102 is 4-7 mm from the optical center 102, and the outer diameter of the annular zone 104 near the outermost side of the mother lens 101 is 15-35 mm from the optical center 102.
Referring to fig. 3, the microlenses 1041 and the microcolumn mirrors 1042 are connected end to form annular zones 104, and the distance L2 between adjacent annular zones 104 is 0.5 to 2mm, wherein the microlenses 1041 are circular spherical surfaces or aspheric design curved surfaces, and the diameter is 0.8 to 2.0 mm; the micro cylindrical mirror 1042 is a circular or cylindrical toroidal curved surface or a toroidal designed curved surface, the arc length of the micro cylindrical mirror 1042 on the annular band 104 is 1-5 mm, the radial diameter is equal to r2-r1, and is 0.6-2 mm. A meridian direction a and a sagittal direction B are arranged in a compound region 103 where the annular zone 104 is distributed, and are indicated by a dotted line in the figure, the meridian direction a is a direction in which the parent lens 101 reduces the decentering of the decentering defocus design in the decentering direction around the optical center 102, the sagittal direction B is a radial direction in which the parent lens 101 reduces the decentering of the decentering defocus design in the decentering direction, and when the defocus in the meridian direction is the defocus in the sagittal direction, the monocular defocus forming a spherical or aspheric defocus pattern is formed, in one embodiment of the microlens 1041, the myopic defocus of the microlens 1041 is designed to be a positive direction 2.5D whose positive myopic defocus amounts in the meridian direction and sagittal direction are equal to 2.5D, where the positive defocus amount is a sum or difference of a curvature of the microlens 1041 and a curvature of one of the surfaces arranged in the parent lens 101 with respect to the annular zone 104, for example, the meridian zone 104 is arranged on the front surface 1011 of the parent lens 101, the front surface 1011 has a curvature of 2.0D, the defocus amount of the microlens 1041 in the zone 104 is 3.0D, and the actual curvature of the microlens 1041 is 5.0D; when the defocus in the sagittal direction is greater than the defocus in the meridional direction, astigmatism with a cylindrical lens is formed, the astigmatism defocus amount is the defocus amount in the sagittal direction-the defocus amount in the meridional direction, in an embodiment of the micro cylindrical lens 1042, the defocus amount in the meridional direction of the micro cylindrical lens 1042 is equal to the defocus amount in the region of the parent lens 101 where the paraxial hyperopic defocus reduction design is equal, the defocus amount in the sagittal direction is greater than the defocus amount in the meridional direction by 1.0D or more, the astigmatism defocus amount in the micro cylindrical lens 1042 is the defocus amount in the sagittal direction-the defocus amount in the meridional direction, that is, the astigmatism is greater than 1.0D or more, and since the meridional direction a is the circular distribution direction in which the paraxial hyperopic defocus reduction design of the parent lens 101, and the sagittal direction B is equal to the radial direction of the parent lens 101, the sagittal direction B is perpendicular to the circular distribution direction, and the astigmatism axis is equal to the meridional direction. The zone 104 formed by connecting the astigmatic defocus structures formed by the microlenses 1041 designed for near vision defocus and the microcolumn lenses 1042 designed for astigmatic defocus alternately with each other is disposed on the front surface 1011 of the mother lens 101, so that the spectacle lens has the function of alternately coexisting near defocus and astigmatic defocus in the concentric circle region.
In some embodiments, there is provided an out-of-focus spectacle lens as shown in the structure of fig. 4, the out-of-focus spectacle lens comprising a parent lens 101, a design surface 105 and a compound area 103. The mother mirror 101 is made of Polycarbonate (PC) material with 1.59 refractive index, the structure of the mother mirror 101 is the same as that of figure 1, the mother mirror 101 comprises a front surface 1011 and a back surface 1012, the curvature of the front surface 1011 of the mother mirror 101 is 2.0D, the curvature radius is 295mm, the curvature of the back surface 1012 of the mother mirror 101 is-5.75D, the curvature radius is 102.61mm, and the prescribed focal power of the optical center 102 of the spectacle lens is-3.75D.
In some embodiments, referring to fig. 4 and 5, the female lens 101 is provided with a design surface 105 for reducing the decentered hyperopic defocus, the design surface 105 is rotationally symmetrically distributed on the back surface 1012 of the female lens 101, and the optical power of the design surface 105 is any one-point defocus amount generated by the decreasing or increasing trend of the optical center 102 towards the radial direction of the female lens 101, and has the function of reducing or correcting the hyperopic defocus and astigmatism existing on the periphery of the retina of a wearer after wearing the lens. The distance defocus design defocus amount of the mother lens 101 at the temporal 30-degree field angle is 1.00D, and the design method of the design surface 105 is as follows:
the rise of the design surface 105 is calculated according to the rise formula, which is:
by the average positive defocus amount D of each field of view of the mother mirror 101 Female And C of astigmatic defocus Female And obtaining unknown parameters in the rise expression by taking the unknown parameters as a conditional substitution formula, wherein the result is as follows: c-3.523; -160.662; a. the 2 ＝2.313E-3；A 4 ＝-5.236E-6；A 6 ＝6.385E-7；A 8 ＝8.214E-11；
The above results are substituted again into the average forward defocus amount D obtained by calculating the average power variation Female Astigmatism defocus C formed by astigmatism variation Female The calculation formula of (2);
average forward defocus D Female The calculation formula of (2) is as follows:
astigmatic defocus C Female The calculation formula of (2) is as follows:
wherein R is 1 And R 2 Respectively, the maximum curvature radius and the minimum curvature radius at a certain point on the surface of the mother mirror 101, n is the refractive index of the lens of the mother mirror 101, D 0 The prescribed optical power of the optical center 102.
In some embodiments, the average forward defocus amount ranges from 0.80D to 2.00D; astigmatism defocus C Female Not more than average forward defocusing amount D Female . Wherein the range of the average forward defocus amount is defined as the average forward defocus amount at a radial position of 20mm from the optical center.
Further, R 1 And R 2 Satisfies the following one-dimensional quadratic equation:
(rt-s 2 )R 2 +g[2pqs-(1+p 2 )t-(1+q 2 )r]R+g 4 0, wherein;
finally, the average positive defocus D of the mother lens 101 in each radial direction is obtained Female And astigmatic defocus C Female The specific result is shown in fig. 6, and the average forward defocus amount D of the parent lens at 10-degree, 20-degree, 30-degree and 40-degree angles of view is calculated Female Comprises the following steps: -0.09, -0.51, -1.00 and-1.17; astigmatic defocus C Female Are respectively 0.09,0.51、0.79、0.70。
In some embodiments, the results of the various field angle correcting defocus measurement of the parent lens 101 designed as described above for reducing or correcting the function based on the hyperopic defocus and astigmatism present at the periphery of the retina after wearing the lens are compared with the values of the hyperopic defocus RPRE and the astigmatism in the direction of J180 ° measured at the periphery of the retina under different field angle fixation conditions in the clinical examination report peripheral refraction study after wearing monofocal lens by myopic children in the institute of medical science, wenzhou, institute of medicine, dysbioson, et al, and the results are shown in table 1.
TABLE 1
Wherein, the temporal angle of view corresponds to the position of the offset optical center 102 after wearing glasses, and the calculation formula is L ═ L (L) 1 /2+L 2 ) X tan (W), L is the position of the optical center 102 shifted after lens mounting, L 1 Is the eye axis radius of gyration, L 2 Is the lens-eye distance, W is the temporal angle of view, wherein, the lens-eye distance L 2 12mm and an ocular axis radius of 13 mm. The above calculation results show that the average forward defocus amount D at each field angle is designed to reduce the off-center hyperopic defocus for the parent lens 101 Female And astigmatic defocus C Female The obtained design values have the function of relatively correcting or reducing the hyperopic defocus and astigmatism existing in the periphery of the naked eye retina.
In some embodiments, referring to fig. 4, after the design surface 105 for reducing the off-center farsightedness defocus is disposed on the surface of the mother lens 101, it is further required to dispose a compound zone 103 on the front surface 1011 of the mother lens 101, wherein the compound zone 103 is centered on the optical center 102 and comprises 11 zones 104 arranged along the radial direction of the mother lens 101, and the first zone, the second zone, the third zone, the fourth zone, the fifth zone, the sixth zone, the seventh zone, the eighth zone, the ninth zone, the tenth zone and the eleventh zone are sequentially defined from the optical center 102 to the outer edge of the mother lens 101; each zone 104 comprises micro lenses 1041 and micro cylindrical lenses 1042, the micro lenses 1041 and the micro cylindrical lenses 1042 are alternately connected end to form a closed loopAn annulus 104. The distance between the inner diameter of the first zone 104 and the optical center 102 is 5mm, the distance between the outer diameter of each adjacent zone 104 and the inner diameter of the zone 104 is equal to 1.25mm, and the distance between the outer diameter of the eleventh zone 104 and the optical center 102 is 30 mm. In each zone 104, the single microlens 1041 is a circular spherical surface with a diameter of 1.14mm, the sub-positive defocus amount of the microlens 1041 is 3.0D, and the relative curvature radius r of the microlens 1041 Micro-meter 196.67 mm; the micro-cylindrical mirror 1042 is a cylindrical annular curved surface, the arc length of the micro-cylindrical mirror 1042 is 1.5mm, the radial diameter of the micro-cylindrical mirror 1042 is 0.8mm, the defocusing amount of the sub-astigmatism of the micro-cylindrical mirror 1042 is 1.5D, wherein the curvature c in the meridian direction of the micro-cylindrical mirror 1042 is x The curvature c of the micro-cylinder 1042 in the sagittal direction is the same as the curvature of the front surface 1011 of the mother mirror 101 yd The curvature in the sagittal direction of the micro-cylinder mirror 1042 is 3.5D for the front surface 1011 curvature + sub-astigmatism defocus of the parent mirror 101
n represents the refractive index of the mother mirror 101.
In some embodiments, the compound zone 103 with 11 zones 104 is superimposed on the design surface 105 for reducing the paraxial hyperopic defocus to obtain a defocus spectacle lens, the optical power of the optical center 102 is-3.75D of the prescription power for correcting ametropia of the wearer, the compound zone 103 area of the non-zone 104 outside the optical center 102 is designed for correcting or reducing the paraxial hyperopic defocus and astigmatism, and the power decreases in each radial direction from the point of the optical center 102 to the outside to produce a defocus amount at any point as shown in Table 1, which has the function of reducing or correcting the hyperopic defocus and astigmatism defocus existing on the periphery of the retina after the wearer wears the spectacle lens; after the micro lens 1041 of the compound area 103 is superposed on the mother lens 101 to reduce the side-center far-vision out-of-focus design surface 105, the light is focused in front of the retina to form a sufficient amount of forward out-of-focus D for near-vision out-of-focus, and the expression of the sufficient amount of forward out-of-focus D is as follows:
wherein r is Micro-meter The radius of curvature of the microlens 1041, if the microlens 1041 is an aspheric curved surface, then
c Micro-meter Is the curvature at the apex of the microlens 1041; n is the refractive index of the mother mirror 101; d Female The average forward defocus of the face 105 is designed. The calculation results of the sufficient forward defocus amount D are shown in Table 2.
TABLE 2
The wearer, wearing the glasses, glances at this area and the lenticules 1041 function to focus light in front of the retina to a sufficient amount of positive defocus to create myopic defocus.
In some embodiments, saccadic movements include eye movements such as a side-looking, afterglow saccade, and the like.
In some embodiments, the micro cylindrical lens 1042 of the compound region 103 superposes the mother lens 101 on the decentralized defocus design surface 105, so that the region is formed with a sufficient defocus amount C larger than the astigmatism defocus at the periphery of the naked eye retina, and the expression of the sufficient astigmatism defocus amount C is as follows: c ═ C Female +(n-1)(c x -c y )；
Wherein, c x Curvature in the meridional direction of the micro-cylinder 1042, c y Is the curvature in the sagittal direction of the micro-cylinder 1042; n is the refractive index of the mother mirror 101; c Female To design the amount of astigmatic defocus of the face 105. The calculated defocus C of the adequate astigmatism is shown in Table 3.
TABLE 3
After the wearer wears the glasses, the area is swept, and the micro-cylindrical lens 1042 has the function of forming an astigmatism stimulation signal to enable astigmatism existing on the periphery of the retina to be out-of-focus for overusing.
In some embodiments, saccadic movements include eye movements such as a side-looking, afterglow saccade, and the like.
In some embodiments, by configuring the microlens 1041 array and the micro cylindrical lens 1042 on the front surface 1011 of the mother lens 101 and alternately connecting the myopic defocus and the astigmatic defocus constituted by interlacing with each other, alternately coexist on the same annular zone 104, a sufficient amount of myopic defocus stimulus signals and astigmatic defocus stimulus signals for the periphery of the retina are added, and by allowing both signals to coexist, the functionality of suppressing the deepening of the axis of the eye is further enhanced. Meanwhile, in the non-annular zone 104 composite region 103, the design surface 105 of the mother lens 101 for reducing the decentral hyperopic defocus has the functions of correcting or reducing the hyperopic defocus and astigmatic defocus at the periphery of the retina, and can realize personalized hyperopic defocus correction design aiming at the requirements of different wearers by increasing or reducing the decentration of the decentral hyperopic defocus.
In some embodiments, by configuring the mother lens 101 with the zone 104 with both myopic defocus and astigmatic defocus, the peripheral myopic defocus and astigmatic defocus of the spectacle lens are increased to obtain the stimulus signal to inhibit further development, and at the same time, the defect of decreased adaptability caused by excessive peripheral astigmatism due to the fact that the concentric circular design for reducing the decentered hyperopic defocus in the side center is used to achieve the same defocus is avoided.
In some embodiments, the microlenses 1041 and the micro cylindrical mirrors 1042 of the at least three sets of annular zones 104 are alternately arranged in the radial direction along one radial direction of the parent mirror 101. Referring to fig. 7, the maximum difference L2 between the inner diameter and the outer diameter of the adjacent zone 104 is set to 2mm, the diameter d of the single microlens 1041 is set to 2mm, the arc length L1 of the single microlens 1042 is set to 4mm, the radial width L3 is set to 2mm, the arc length L2 on the concentric circle where the single microlens 1041 and the single microlens 1042 are connected is set to 6mm, the inner diameter L4 in the adjacent zone 104 is set to 4mm, the composite zone 103 is designed to be arranged on the front surface 1011 of the mother lens 101, the design surface 105 for reducing the lateral central hyperopic defocus is arranged on the rear surface 1012 of the mother lens 101, and the out-of-focus spectacle lens is designed by the value of the limit size.
In some embodiments, referring to fig. 8, considering the eye as a system of a single medium and refractive surfaces, the pupillary saccade spectacle lens zone calculation method is calculated using the following formula:
setting: the curvature radius R of the eyeball refracting surface is 5mm, the spectacle distance h is 12mm, the pupil diameter d is 4mm, the eye axis length l is 24mm, the radius R on the gladiodal saccade lens is calculated to be 2.45mm, the diameter is 4.90mm, the area S of the peripheral area of the gladiodal saccade area of the pupil diameter is 18.86mm 2 。
The area formed by the diameter of 4.90mm on the lens with the pupil saccade is calculated to simulate the area presented on the lens when the human eye penetrates the lens, and referring to fig. 7, the simulation presentation area is filled by oblique lines in order to clearly distinguish the area left by the human eye penetrating the lens. Wherein E represents a saccadic region, which represents a circular shape with a diameter of 4.9mm, when the wearer wears the glasses and then eyes penetrate or glance through the middle position of each adjacent zone 104 of the compound region 103 (F in fig. 8), the geometric center of the circular shape of the saccadic region is located in the blank central area of the adjacent zone 104, since the largest difference L2 between the inner diameter and the outer diameter of the adjacent zone 104 is 2mm, the diameter d of the single microlens 1041 is 2mm, the arc length L1 of the single microlens 1042 is 4mm, and the radial width L3 of the microlens 1042 is 2mm, within the circular diameter of the saccadic region of 4.9mm, the diameter is larger than the sum of the blank area of the adjacent zone 104 of L2, the blank area larger than L2+ d and the single microlens 1041 area, the sum of the blank area larger than L2+ L3 and the radial width of the microlens 1042, and the arc length of the microlens 1042 larger than L1; or when the wearer wears the glasses and the eyes penetrate or glance through the middle position of the zone 104 of the compound zone 103 (G in fig. 8), when the circular geometric center of the saccadic region is located at the center position of the zone 104, the diameter of the saccadic region is larger than the arc length of the micro-cylindrical lens 1042 of l1, and is larger than the diameter of the micro-lens 1041 of d, and at the same time, the saccadic diameter is 4.9mm, and the region of l2 which is 6mm and is formed by alternately connecting the micro-lens 1041 and the micro-cylindrical lens 1042 is partially contained in the region of the saccadic diameter; the requirement is met that the area of the myopic out-of-focus sub-microlens 1041 with the function of reducing the decentration of the myopic out-of-focus lens (L2) and the area of the myopic out-of-focus sub-microlens 1042 with the function of adjusting the astigmatism is covered or contained in one pupil scanning area.
In some embodiments, the pupil diameter of the human eye is between about 2.0mm and about 4.0mm in an equicircular shape, and the different pupil diameters correspond to different areas of the peripheral region of the saccadic lens for the eye, e.g., the 2mm pupil diameter saccadic lens has a region diameter of 2.272mm and an area S of 4.054mm 2 (ii) a 3mm pupil diameter the area of the saccade lens is 3.47mm in diameter and the area S is 9.46mm 2 (ii) a 4mm pupil diameter the area diameter of the saccade lens is 4.9mm, area S18.86mm 2 (ii) a In the areas corresponding to the periphery of the saccade lens calculated by different pupil diameters, the sum of the area of the micro lens 1041 calculated by the diameter of the micro lens 1041 generating myopic defocus and the area of the micro cylindrical lens 1042 generating astigmatic defocus overused, the area of which is calculated by the radial diameter, accounts for 70% of the area S of the periphery area of the lens in the saccade area of the pupil diameter, and the other parts in the areas are designed for reducing the sidewise central hyperopic defocus; when a pupil diameter scans the peripheral area of the lens, sufficient three defocus functions such as myopic defocus and astigmatic defocus beyond the peripheral astigmatic defocus of the naked eye retina can be ensured to coexist, namely, the light can be focused in front of the retina, the peripheral astigmatic defocus can be reduced or corrected outside the non-annular zone 104 composite zone 103, and the three defocus functions can be realized, so that the further occurrence and development of the teenager eye axis can be inhibited.
In some embodiments, the mother lens 101 is not designed for correcting hyperopic defocus, only the annular zone 104 with the same structure as above is arranged on the mother lens 101, that is, the surface of the mother lens 101 has the annular zone 104 formed by the structure of myopic defocus and astigmatic defocus, and the non-annular zone has no design surface 105 for reducing or correcting hyperopic defocus and astigmatism, and by the above design, due to the lack of the overlapping effect of the design surface 105 and the microlenses 1041 and the micro cylindrical lenses 1042 on the annular zone, the non-annular zone does not have the function of reducing or correcting hyperopic defocus, although the distance between the annular zones can be adjusted, the non-annular zone necessarily exists between the annular zones, further reducing the axial myopia slowing, and being not beneficial to myopia control; when the non-annular zone is designed to be an aspheric surface, the aspheric surface is designed to reduce or eliminate the focal power difference and oblique astigmatism caused by oblique vision of eyes, reduce the distortion of the peripheral zone of the lens, expand the peripheral visual field and improve the wearing comfort, however, for teenager axial myopia, the defocusing lens has the functions of solving peripheral defocusing and astigmatism stimulation, relieving the further development of the axis of the eye and leading to myopia deepening, and the aspheric surface designed in the non-annular zone obviously has a peripheral visual field which is not needed by teenagers and is not beneficial to inhibiting the development of teenager axial myopia.
In some embodiments, with further reference to fig. 9, where (a) in fig. 9 represents a corresponding left eye and (b) in fig. 9 represents a corresponding right eye, the annulus 104 may adopt a non-closed configuration in an out-of-focus ophthalmic lens design. The method specifically comprises the following steps: the first annular belt or the first annular belt and the second annular belt are designed to be in a non-closed belt shape, and the non-closed annular belt is partially inwards rotated by 8 degrees so as to increase the visual area of downward inwards rotated eyes when a wearer wears glasses to read; the zone 104 comprises a micro lens 1041 for forming myopic defocus and a micro cylindrical lens 1042 for forming astigmatic defocus, and adopts a non-closed design, and by superposing a design surface 105 for reducing the decentered hyperopic defocus at the side center, the wearer can simultaneously configure three functions of reducing the decentered hyperopic defocus and astigmatism easily adapted, and enough myopic defocus for focusing light in front of retina and astigmatic defocus exceeding the peripheral astigmatic defocus of the naked retina within the saccadic range of the pupil after wearing the lens.
In some embodiments, referring to fig. 10, the micro-cylinder 1042 can also adopt a circular structure, and the micro-cylinder 1042 and the micro-lens 1041 are alternately connected to form an annular zone 104 with alternating myopic defocus and astigmatic defocus, and are overlapped with a plus-minus side center hyperopic defocus design, and also has the functions of simultaneously configuring easily adaptable reduction of the side center hyperopic defocus and astigmatism, sufficient myopic defocus capable of focusing light in front of the retina and astigmatic defocus exceeding the peripheral astigmatic defocus of the naked retina within the saccadic range of the pupil.
In some embodiments, referring to fig. 11, the zone 104 may be a polygonal structure, at least a pentagon, and the polygonal zone 104 is used in a side-by-side plus-minus central hyperopic defocus design, and also has three functions of simultaneously configuring, within the range of pupillary saccade, easily adaptable side-by-center hyperopic defocus and astigmatism reduction, sufficient myopic defocus for focusing light in front of the retina, and astigmatic defocus beyond the amount of naked-eye retinal peripheral astigmatic defocus.
In some embodiments, referring to fig. 12-14, to prepare a mold for an out-of-focus ophthalmic lens, the mold includes a first mold shoe 201 and a second mold shoe 202 for molding a surface of the female lens 101. The working surface of the first die holder 201 is a concave surface 203, and the working surface of the second die holder 202 is a convex surface 204; the concave surface 203 is provided with a cavity 205, the structure of the cavity 205 corresponds to the position of the girdle 104 on the mother mirror 101, and the cavity 205 is used for molding the girdle 104; the cavity 205 is provided with a first groove 206 and a second groove 207 which are alternately connected, the first groove 206 is used for forming the micro lens 1041, and the second groove 207 is used for forming the micro cylindrical mirror 1042.
In some embodiments, the material of the mold may be selected from metal or glass, and the mold may be formed by injection molding or cast molding to form a blank of an ophthalmic lens, and then machining the rear surface 1012 of the blank by a lathe to form the desired ophthalmic lens for the wearer.
In some embodiments, the out-of-focus spectacle lens is formed by overlapping compound areas 103 which are formed by staggered connection of a mother lens 101, a micro lens 1041 for myopic out-of-focus and a micro cylindrical lens 1042 for astigmatic out-of-focus, wherein the compound areas are designed to reduce the paraxial hyperopic out-of-focus and astigmatism, and three functions of sufficient myopic out-of-focus which can enable light rays to be focused in front of the retina and astigmatic out-of-focus which exceeds the peripheral astigmatic out-of-focus amount of the naked eye retina are simultaneously configured in the saccadic range of a wearer after the spectacle lens is worn, so that optical stimulation signals for promoting the reverse development of the ocular axis at the periphery of the retina are enriched, and the product functionality is enhanced.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The defocused eyeglass lens-level mold provided by the embodiment of the application is described in detail, and a specific example is applied to explain the principle and the implementation of the application, and the description of the embodiment is only used for helping to understand the technical scheme and the core idea of the application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. An ophthalmic lens, comprising:
a mother lens (101), wherein the surface of the mother lens (101) is provided with a design surface (105) for correcting or reducing the hyperopic defocus and astigmatism of the periphery of the naked eye retina; the design surface (105) is rotationally and symmetrically distributed on the surface of the mother mirror (101), the design surface (105) comprises an optical center (102), and the optical center (102) is coincident with the geometric center of the mother mirror (101);
a compound area (103), wherein the compound area (103) is arranged on the surface of the mother mirror (101), and the compound area comprises a plurality of groups of annular bands (104);
the annular belt (104) comprises a micro lens (1041) for forming myopic defocus and a micro cylindrical lens (1042) for forming astigmatic defocus, and the micro lens (1041) and the micro cylindrical lens (1042) are connected end to end; in each group of the ring zones (104), the adjacent microlenses (1041) are connected through the micro-cylindrical lenses (1042);
the microlenses (1041) and the micro cylindrical lenses (1042) of at least three groups of the zones (104) are alternately arranged in a radial direction of the parent mirror (101).
2. An ophthalmic lens element according to claim 1,
the parent mirror (101) comprising a front surface (1011) and a rear surface (1012), the design face (105) being located on the front surface (1011) or the rear surface (1012);
the composite region (103) is on the same side or different side than the design surface (105).
3. An ophthalmic lens according to claim 1, characterized in that the optical power of the design surface (105) is any one-point defocus generated by the change in the optical center in the radial direction of the parent lens (101).
4. An ophthalmic lens according to claim 1, characterized in that: the design curved surface of the micro lens (1041) is a spherical curved surface or an aspheric curved surface with positive defocusing amount; the design curved surface of the micro cylindrical lens (1042) is a ring curved surface or a super ring curved surface, and the axial direction of the astigmatism at any point on the micro cylindrical lens (1042) is the same as the axial direction of the astigmatism at the same position on the parent lens (101).
5. An ophthalmic lens according to claim 4, characterized in that: the diameter of the micro lens (1041) is 0.8-2 mm; the arc length of the micro cylindrical lens (1042) is 1-4 mm, and the radial diameter of the micro cylindrical lens (1042) is 0.6-2 mm.
6. An ophthalmic lens according to claim 1, characterized in that the inner diameter of the zone (104) closest to the optical centre (102) is at a distance of 4-7 mm from the optical centre (102); the distance between the outer diameter of the annular zone (104) farthest from the optical center (102) and the optical center (102) is 15-35 mm; the distance between two adjacent annular belts (104) is 0.5-2 mm.
7. An ophthalmic lens according to claim 6, characterized in that said annulus (104) is a closed annulus or a non-closed annulus.
8. An ophthalmic lens according to claim 7, characterized in that the circumferential zone (104) is polygonal or circular.
9. An ophthalmic lens according to claim 1, characterized in that said microlenses (1041) are circular and said micro-cylinders (1042) are circular or cylindrical.
10. A mold for producing an ophthalmic lens according to any one of claims 1 to 9, characterized by comprising a first mold shoe (201) and a second mold shoe (202) for shaping the surface of the female lens (101); the working surface of the first die holder (201) is a concave surface (203), and the working surface of the second die holder (202) is a convex surface (204); the concave surface (203) is provided with a cavity (205) for molding the ring belt (104), a first groove (206) for molding the micro lens (1041) and a second groove (207) for molding the micro cylindrical lens (1042) are arranged in the cavity (205), and the first groove (206) and the second groove (207) are alternately connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221308016.5U CN217386033U (en) | 2022-05-26 | 2022-05-26 | Spectacle lens and mold |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221308016.5U CN217386033U (en) | 2022-05-26 | 2022-05-26 | Spectacle lens and mold |
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| CN217386033U true CN217386033U (en) | 2022-09-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114815309A (en) * | 2022-05-26 | 2022-07-29 | 苏州明世光学科技有限公司 | Out-of-focus spectacle lens and mold |
| CN116027571A (en) * | 2022-12-06 | 2023-04-28 | 首都医科大学附属北京同仁医院 | Myopia defocusing lens and myopia defocusing glasses |
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2022
- 2022-05-26 CN CN202221308016.5U patent/CN217386033U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114815309A (en) * | 2022-05-26 | 2022-07-29 | 苏州明世光学科技有限公司 | Out-of-focus spectacle lens and mold |
| CN114815309B (en) * | 2022-05-26 | 2024-05-24 | 苏州明世光学科技有限公司 | Defocused spectacle lens and die |
| CN116027571A (en) * | 2022-12-06 | 2023-04-28 | 首都医科大学附属北京同仁医院 | Myopia defocusing lens and myopia defocusing glasses |
| CN116027571B (en) * | 2022-12-06 | 2023-08-29 | 首都医科大学附属北京同仁医院 | Myopia defocusing lens and myopia defocusing glasses |
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