Microprism ophthalmic lens and method of forming same

Abstract

The invention discloses a microprism spectacle lens and a forming method thereof, the microprism spectacle lens comprises a front mirror surface and a rear mirror surface, the front mirror surface and the rear mirror surface are respectively provided with a front mirror surface upper side optical zone and a front mirror surface lower side optical zone, and a rear mirror surface upper side optical zone and a rear mirror surface lower side optical zone; the rear mirror surface upper side optical region is provided with a rear mirror surface upper side optical region vertical diameter line length, a rear mirror surface upper side optical region horizontal diameter line length and a rear mirror surface upper side optical region area; the rear mirror surface lower side optical region is provided with a rear mirror surface lower side optical region vertical diameter line length, a rear mirror surface lower side optical region horizontal diameter line length and a rear mirror surface lower side optical region area; the front mirror surface lower side optical area is composed of a plurality of miniature triple prisms, the myopia dual-light miniature triple prism spectacle lens relates to the technical field of glasses, the myopia dual-light miniature triple prism spectacle lens has the myopia correction function, has no obvious concave-convex appearance, has the functions of recovering eye adjustment and gathering balance, enables near vision to be equal to far vision, and is suitable for myopia with normal eye positions, external hidden inclination and internal hidden inclination.

Description

Technical Field

[0001] The present invention relates to the technical field of glasses, in particular to a micro prism spectacle lens and a method for forming the same. Background Art

[0002] A single-vision concave lens spectacle lens cannot control the occurrence and development of myopia.

[0003] When the eyes look at near objects, there are three physiological reactions of near vision: pupil constriction, increased accommodation, and increased convergence. Accommodation and convergence are parallel and inseparable coordinated physiological reactions. Accommodation lag is one of the main pathogenic factors for the occurrence and development of myopia. Myopia prevention and control glasses should correct accommodation lag.

[0004] The combination of a convex lens and a triangular prism in the lower region of the spectacle lens is called a bifocal prism. At present, the effectiveness of the bifocal prism in controlling myopia is 50%-60%. The bifocal prism restores the natural balance of accommodation and convergence, and has good effects on emmetropia, esophoria and exophoria myopia, especially for exophoria myopia and myopia with rapid progression of myopia degree.

[0005] Traditional ophthalmic prisms have obvious appearance protrusions, large volume, heavy lenses, easy to cause visual distortion, chromatic aberration and other defects.

[0006] At present, there are no patents and products of ophthalmic micro prisms for myopia prevention and control. The myopia prevention and control spectacle lens for children and adolescents is still one of the technical problems in the spectacle field.

[0007] In summary, it is necessary to develop a new surface design of spectacle lenses, that is, a myopia bifocal micro prism spectacle lens. Summary of the Invention

[0008] Aiming at the deficiencies of the prior art, the present invention provides a micro prism spectacle lens and a method for forming the same, which solves the problems of obvious appearance protrusions, large volume, heavy lenses, easy to cause visual distortion, chromatic aberration and other problems of existing traditional ophthalmic prisms.

[0009] To achieve the above objectives, the present invention is realized through the following technical solutions: A micro prism spectacle lens and a method for forming the same, including a front lens surface and a rear lens surface, and a front upper optical zone, a front lower optical zone, a rear upper optical zone and a rear lower optical zone are respectively provided on the front lens surface and the rear lens surface;

[0010] The vertical meridian length, horizontal meridian length and area of the upper optical zone of the rear lens surface are provided on the upper optical zone of the rear lens surface;

[0011] The vertical meridian length, horizontal meridian length and area of the lower optical zone of the rear lens surface are provided on the lower optical zone of the rear lens surface;

[0012] The upper optical area of the front mirror surface is a plano - mirror, and the lower optical area of the front mirror surface is composed of several micro - triangular prisms;

[0013] The bottom shape of several of the micro - triangular prisms is rectangular, with a diameter length of 2.0 mm, a diameter width of 1.5 mm, a base thickness of 0.5 mm, the base facing the nasal side, and a prism diopter of 3.0△;

[0014] The upper optical area of the rear mirror surface is a concave lens, and the lower optical area of the rear mirror surface is a convex lens;

[0015] The vertical diameter length of the upper optical area of the rear mirror surface is 1.0 mm to 6.0 mm longer than the vertical diameter length of the lower optical area of the rear mirror surface;

[0016] The horizontal diameter length of the upper optical area of the rear mirror surface is 2.0 mm to 8.0 mm longer than the horizontal diameter length of the lower optical area of the rear mirror surface;

[0017] The area of the upper optical area of the rear mirror surface is 6.0 mm 2 to 30.0 mm 2 ;

[0018] The refractive convex lens of the lower optical area of the rear mirror surface has a refractive power of +2.00D.

[0019] Preferably, the refractive power of the concave lens in the upper optical area of the rear mirror surface is 0.00D to - 10.00D.

[0020] Preferably, the convex lens in the lower optical area of the rear mirror surface is a perfect circle or an ellipse, and a gradient area 4 with a width of 2.0 mm to 6.0 mm is set around it or the gradient area 4 is not set.

[0021] Preferably, the positive addition value of the refractive power of the convex lens in the lower optical area of the rear mirror surface relative to the refractive power of the concave lens in the upper optical area of the rear mirror surface is +0.75D to +3.00D.

[0022] Preferably, the bottom shape of several of the micro - triangular prisms can also be one of a circle, an ellipse, a rectangle, a semi - circle, a pentagon, and a hexagon.

[0023] Preferably, the lower optical area of the front mirror surface can also be composed of micro - triangular prisms and refractive convex lenses.

[0024] Preferably, several of the micro - triangular prisms can be distributed in the lower optical area of the front mirror surface in one of a linear array, a semi - circular array, a long - strip array, a radial array, and a perfect - circle array.

[0025] Preferably, a number of the micro prisms are in a decentralized array with a spacing of 0.5 mm between rows and columns. A number of the micro prisms can also be in a stepped array with a zero spacing and being closely connected between rows and columns.

[0026] Preferably, the ratio of the diopter of a number of the micro prisms to the diopter of the convex lens is as follows: the diopter of the micro prism of 3.0△ corresponds to the diopter of the convex lens of +2.00D, the diopter of the micro prism of 2.0△ corresponds to the diopter of the convex lens of +1.50D, the diopter of the micro prism of 1.5△ corresponds to the diopter of the convex lens of +1.00D, and the diopter of the micro prism of 1.0△ corresponds to the diopter of the convex lens of +0.75D.

[0027] The present invention provides a micro prism spectacle lens and a method for forming the same, having the following beneficial effects:

[0028] 1. This myopic bifocal micro prism spectacle lens has a myopia correction function, has no obvious concave or convex appearance, has a function of restoring the eye accommodation and convergence balance, has the same vision for near and far, is suitable for myopia with normal eye position, exophoria, and esophoria, especially for myopic patients with exophoria and those with rapidly developing myopia degrees, and has a significant effect when worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of a decentralized micro prism in the lower optical zone of the front lens surface and a circular convex lens in the lower optical zone of the rear lens surface.

[0030] Figure 2 is a schematic structural diagram of a decentralized micro prism in the lower optical zone of the front lens surface.

[0031] Figure 3 is a schematic structural diagram of a stepped micro prism in the lower optical zone of the front lens surface.

[0032] Figure 4 is a schematic structural diagram of a circular convex lens in the lower optical zone of the rear lens surface with a gradient zone provided.

[0033] Figure 5 is a schematic structural diagram of a circular convex lens in the lower optical zone of the rear lens surface without a gradient zone provided.

[0034] Figure 6 is a schematic structural diagram of the diameter length, diameter width, and base thickness of a three-dimensional enlarged micro prism.

[0035] Figure 7 is a schematic structural diagram of the vertical diameter line, horizontal diameter line, and area of the upper optical zone and the lower optical zone of the rear lens surface.

[0036] In the figure: 1 - front mirror surface, 2 - rear mirror surface, 3 - regular circle, 4 - gradient area, 5 - plano lens, 6 - concave lens, 7 - convex lens, 8 - micro triangular prism, 9 - radial length, 10 - radial width, 11 - substrate thickness, 12 - spacing, 13 - mirror base, 14 - decentralized array, 15 - stepped array, 16 - upper optical area of the rear mirror surface, 17 - lower optical area of the rear mirror surface, 18 - upper optical area of the front mirror surface, 19 - lower optical area of the front mirror surface, 20 - vertical diameter line length of the upper optical area of the rear mirror surface, 21 - vertical diameter line length of the lower optical area of the rear mirror surface, 22 - horizontal diameter line length of the upper optical area of the rear mirror surface, 23 - horizontal diameter line length of the lower optical area of the rear mirror surface, 24 - area of the upper optical area of the rear mirror surface, 25 - area of the lower optical area of the rear mirror surface. Detailed implementation mode

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] Please refer to Figure 1-7 , the present invention provides a technical solution: a micro prism spectacle lens and a method for forming the same, including a front mirror surface 1 and a rear mirror surface 2, and an upper optical area 18 of the front mirror surface, a lower optical area 19 of the front mirror surface, an upper optical area 16 of the rear mirror surface, and a lower optical area 17 of the rear mirror surface are respectively arranged on the front mirror surface 1 and the rear mirror surface 2;

[0039] The front mirror surface 1 is molded or injection-molded into a blank sheet, and then the blank sheet is ground by a numerical control lathe to form the rear mirror surface 2;

[0040] On the upper optical area 16 of the rear mirror surface, a vertical diameter line length 20 of the upper optical area of the rear mirror surface, a horizontal diameter line length 22 of the upper optical area of the rear mirror surface, and an area 24 of the upper optical area of the rear mirror surface are provided;

[0041] On the lower optical area 17 of the rear mirror surface, a vertical diameter line length 21 of the lower optical area of the rear mirror surface, a horizontal diameter line length 23 of the lower optical area of the rear mirror surface, and an area 25 of the lower optical area of the rear mirror surface are provided;

[0042] The upper optical area 18 of the front mirror surface is a plano lens 5, and the lower optical area 19 of the front mirror surface is composed of a plurality of micro triangular prisms 8;

[0043] A triangular prism is a transparent lens body with a triangular cross-section in optics. The combination of a triangular prism and a convex lens is called a bifocal prism. The bifocal prism can effectively control the development of myopia. Traditional ophthalmic triangular prism lenses have many defects such as obvious convex appearance, large volume, heavy lens, easy to cause visual distortion, and chromatic dispersion;

[0044] The maximum diameter length of the micro triangular prism 8 ranges from 50 μm (micrometer level) to less than 4.0 mm (millimeter level), and it has advantages such as no obvious convex or concave phenomenon, small volume, light weight, reduced visual distortion, and reduced chromatic dispersion. The micro triangular prism 8 is combined with the convex lens 7, which is called a bifocal micro prism or a bifocal micro triangular prism;

[0045] The number of the micro triangular prisms 8 can be set within the range of 6 to 300;

[0046] The bottom shape of several of the micro triangular prisms 8 is rectangular, with a diameter length 9 of 2.0 mm, a diameter width 10 of 1.5 mm, a base thickness 11 of 0.5 mm, the base 13 facing the nasal side, and a prism diopter of 3.0△;

[0047] The upper optical zone 16 on the rear lens surface is a concave lens 6, and the lower optical zone 17 on the rear lens surface is a convex lens 7;

[0048] The vertical diameter length 20 of the upper optical zone on the rear lens surface is longer than the vertical diameter length 21 of the lower optical zone on the rear lens surface by 1.0 mm to 6.0 mm;

[0049] The horizontal diameter length 22 of the upper optical zone on the rear lens surface is longer than the horizontal diameter length 23 of the lower optical zone on the rear lens surface by 2.0 mm to 8.0 mm;

[0050] The area 24 of the upper optical zone on the rear lens surface is larger than the area 25 of the lower optical zone on the rear lens surface by 6.0 mm 2 to 30.0 mm 2 ;

[0051] The refractive power of the refractive convex lens in the lower optical zone of the rear lens surface 2 is +2.00 D;

[0052] When the eye looks at near objects, there are physiological reactions of the near vision triple linkage, including pupil constriction, increased accommodation, and increased convergence. To reduce the accommodation force with a convex lens and reduce the convergence force with a triangular prism, and to balance the accommodation and convergence functions, it is necessary to usually compound the convex lens and the triangular prism. The lower optical zone on the front lens surface of the existing myopia spectacle lens is set as a micro triangular prism, and the lower optical zone on the front lens surface is compounded or the lower optical zone on the rear lens surface is a refractive convex lens, forming a bifocal micro triangular prism or a bifocal micro prism;

[0053] The prism diopter of the micro triangular prism 8 is between 1.0△ and 3.5△, and the corresponding diopter of the convex lens 7 is between +0.50 D and 3.50 D

[0054] There are two upper and lower optical zones respectively arranged on the front and rear mirror surfaces of this spectacle lens. The upper optical zone on the front mirror surface is a plano lens. The purpose of setting the plano lens is to be designed to adapt to the concave lens in the upper optical zone on the rear mirror surface. The plano lens does not affect or interfere with the refractive power of the concave lens in the upper optical zone on the rear mirror surface.

[0055] Furthermore, the refractive power of the concave lens in the upper optical zone 16 on the rear mirror surface is from 0.00D to -10.00D. The purpose of setting 0.00D is for those with low hyperopia reserve to wear. The refractive power of the upper optical zone 16 on the rear mirror surface is also customized according to the myopic astigmatism degree, and the astigmatism degree < 4.00DS.

[0056] Furthermore, the convex lens 7 in the lower optical zone 17 on the rear mirror surface is a perfect circle or an ellipse and a gradient zone of 2.0mm to 6.0mm is set around it or no gradient zone is set.

[0057] Furthermore, the positive addition value of the refractive power of the convex lens 7 in the lower optical zone 17 on the rear mirror surface relative to the refractive power of the concave lens 6 in the upper optical zone 16 on the rear mirror surface is from +0.75D to +3.00D.

[0058] Furthermore, the bottom shape of several of the micro prisms 8 can also be one of a circle, an ellipse, a rectangle, a semi-circle, a pentagon, and a hexagon.

[0059] Furthermore, the lower optical zone 19 on the front mirror surface can also be composed of micro prisms and refractive convex lenses.

[0060] Furthermore, several of the micro prisms 8 can be distributed within the lower optical zone 19 on the front mirror surface in one of a linear array, a semi-circular array, a long strip array, a radial array, and a perfect circle array.

[0061] Furthermore, several of the micro prisms 8 form a decentralized array 14, and a 0.5mm spacing is set for the spacing 12 between rows and columns. Several of the micro prisms 8 can also form a stepped array 15, and the spacing 12 between rows and columns is zero and they are closely connected.

[0062] Furthermore, the ratio of the degrees of several of the micro prisms 8 to the degree of the convex lens 7: the degree of the micro prism 8 of 3.0△ corresponds to the degree of the convex lens 7 of +2.00D, the degree of the micro prism 8 of 2.0△ corresponds to the degree of the convex lens 7 of +1.50D, the degree of the micro prism 8 of 1.5△ corresponds to the degree of the convex lens 7 of +1.00D, the degree of the micro prism 8 of 1.0△ corresponds to the degree of the convex lens 7 of +0.75D;

[0063] The positive addition value means adding the degree of the convex lens on the basis of the refractive power of the concave lens, so it is also called the additional plus power of the lower optical zone;

[0064] The ratio of the diopter of the micro triangular prism 8 to the diopter of the convex lens 7 is also increased or decreased according to the myopia diopter, accommodation diopter, and convergence power of the spectacle wearer. The principle is within the above ratio of diopters, but the above ratio is not limited.

[0065] Those skilled in the art shall connect the components in this case in sequence. For the specific connection and operation sequence, reference should be made to the following working principle. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process.

[0066] Embodiment: Taking the case of a myopia diopter of -4.00D as an example: The front surface 1 of the spectacle lens is molded by pressing or injection molding into a blank lens. The upper optical zone 18 of the front surface is a plano lens, and the diopter of the micro triangular prism 8 in the lower optical zone 19 of the front surface is prepared as 3.0△. Then, the blank lens is formed into the rear surface 2 through a numerical control lathe. The refractive power of the upper optical zone of the rear surface is -4.00D, and the lower optical zone 17 of the rear surface is formed into a positive circular convex lens with a positive addition value of +2.00D. The convex lens 7 is provided with a 4.0mm gradient zone;

[0067] The convex lens 7 in the lower optical zone 17 of the rear surface is positive circular or elliptical. The rear surface is formed by a numerical control lathe. The astigmatism diopter of positive circular grinding is extremely low. A gradient zone 4 of 2.0mm to 6.0mm is provided around the circular convex lens, or the gradient zone 4 is not provided. The gradient zone 4 eliminates the refractive jump phenomenon between the convex and concave lenses in the lower optical zone and the upper optical zone.

[0068] This myopia bifocal micro triangular prism spectacle lens has the functions of correcting myopia and improving distant vision, balancing the disorders of accommodation and convergence functions, making near vision equal to distant vision, and effectively controlling the occurrence and development of myopia, with outstanding substantive features and remarkable progress.

[0069] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation. An element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0070] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Microprismatic spectacle lenses and a method for forming the same, comprising a front lens surface (1) and a rear lens surface (2), characterized in that, The front mirror surface (1) and the rear mirror surface (2) are respectively provided with a front upper mirror surface optical zone (18), a front lower mirror surface optical zone (19), a rear upper mirror surface optical zone (16), and a rear lower mirror surface optical zone (17); The rear upper mirror surface optical zone (16) is provided with a vertical diameter line length (20), a horizontal diameter line length (22), and an area (24) of the rear upper mirror surface optical zone; The rear lower mirror surface optical zone (17) is provided with a vertical diameter line length (21), a horizontal diameter line length (23), and an area (25) of the rear lower mirror surface optical zone; The front upper mirror surface optical zone (18) is a plano - lens (5), and the front lower mirror surface optical zone (19) is composed of a plurality of micro - triangular prisms (8); The bottom shapes of the plurality of micro - triangular prisms (8) are rectangular, with a diameter length (9) of 2.0 mm, a diameter width (10) of 1.5 mm, a base thickness (11) of 0.5 mm, the base (13) facing the nasal side, and a prism diopter of 3.0△; The rear upper mirror surface optical zone (16) is a concave lens (6), and the rear lower mirror surface optical zone (17) is a convex lens (7); The vertical diameter line length (20) of the rear upper mirror surface optical zone is 1.0 mm to 6.0 mm longer than the vertical diameter line length (21) of the rear lower mirror surface optical zone; The horizontal diameter line length (22) of the rear upper mirror surface optical zone is 2.0 mm to 8.0 mm longer than the horizontal diameter line length (23) of the rear lower mirror surface optical zone; The area (24) of the upper optical zone of the rear mirror surface is greater than the area (25) of the lower optical zone of the rear mirror surface by 6.0 mm 2 to 30.0 mm 2 ; The refractive convex lens refractive power of the lower optical zone of the rear mirror surface (2) is +2.00D.

2. The microprismatic spectacle lens and the method for forming the same according to claim 1, wherein The concave lens refractive power of the rear upper mirror surface optical zone (16) is 0.00D to - 10.00D.

3. The microprismatic spectacle lens and the method for forming the same according to claim 1, wherein The convex lens (7) of the rear lower mirror surface optical zone (17) is circular or elliptical and is provided with a gradient zone (4) with a width of 2.0 mm to 6.0 mm around it or without a gradient zone (4); 4. The microprismatic spectacle lens and its forming method according to claim 1, characterized in that, The positive addition value of the refractive power of the convex lens (7) of the rear lower mirror surface optical zone (17) relative to the refractive power of the concave lens (6) of the rear upper mirror surface optical zone (16) is +0.75D to +3.00D.

5. The microprismatic spectacle lens according to claim 1 and its forming method, characterized in that, The bottom shapes of the plurality of micro - triangular prisms (8) can also be one of circular, elliptical, rectangular, semi - circular, pentagonal, and hexagonal.

6. The microprismatic spectacle lens and its forming method according to claim 1, characterized in that, The front lower mirror surface optical zone (19) can also be composed of micro - triangular prisms and refractive convex lenses.

7. The microprismatic spectacle lens according to claim 1 and the method for forming the same, characterized in that, The plurality of micro - triangular prisms (8) can be distributed in the front lower mirror surface optical zone (19) in one of a linear array, a semi - circular array, a long - strip array, a radial array, and a circular array.

8. The microprismatic spectacle lens and the method for forming the same according to claim 1, wherein, The plurality of micro - triangular prisms (8) are in a dispersed array (14), with a spacing (12) of 0.5 mm between rows and columns. The plurality of micro - triangular prisms (8) can also be in a stepped array (15), with a spacing (12) of zero between rows and columns and being closely connected.

9. The microprismatic spectacle lens and its forming method according to claim 1, characterized in that, Ratio of the degrees of several of the micro triangular prisms (8) to the degrees of the convex lens (7): For a micro triangular prism (8) with a degree of 3.0△, the corresponding convex lens (7) has a degree of +2.00D; for a micro triangular prism (8) with a degree of 2.0△, the corresponding convex lens (7) has a degree of +1.50D; for a micro triangular prism (8) with a degree of 1.5△, the corresponding convex lens (7) has a degree of +1.00D; for a micro triangular prism (8) with a degree of 1.0△, the corresponding convex lens (7) has a degree of +0.75D.

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