WO2023005211A1 - 用于控制近视加深的环焦眼镜片及其制造方法 - Google Patents

用于控制近视加深的环焦眼镜片及其制造方法 Download PDF

Info

Publication number
WO2023005211A1
WO2023005211A1 PCT/CN2022/079507 CN2022079507W WO2023005211A1 WO 2023005211 A1 WO2023005211 A1 WO 2023005211A1 CN 2022079507 W CN2022079507 W CN 2022079507W WO 2023005211 A1 WO2023005211 A1 WO 2023005211A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring
curved surface
focus
curvature
focus spectacle
Prior art date
Application number
PCT/CN2022/079507
Other languages
English (en)
French (fr)
Inventor
张志辉
王波
杜嗣河
梁子文
何丽婷
张家俊
黄卓明
王政行
Original Assignee
香港理工大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 香港理工大学 filed Critical 香港理工大学
Priority to CA3227573A priority Critical patent/CA3227573A1/en
Priority to JP2024504238A priority patent/JP2024525968A/ja
Priority to KR1020247006833A priority patent/KR20240035896A/ko
Priority to AU2022317671A priority patent/AU2022317671A1/en
Priority to EP22847831.9A priority patent/EP4379456A1/en
Publication of WO2023005211A1 publication Critical patent/WO2023005211A1/zh

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
    • G02C2202/24—Myopia progression prevention
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses

Definitions

  • the invention relates to spectacle lenses, in particular to a ring-focus spectacle lens for controlling myopia deepening and a manufacturing method thereof.
  • Myopia is a common eye disease. Myopia is mainly due to the excessive elongation of the eyeball, which makes the focal plane of distant objects fall in front of the retina, resulting in blurred distant vision. According to a study, by 2050, more than 50% of the global population will be nearsighted. In order to find effective intervention measures to control the development of myopia, scholars in related fields have conducted a lot of research. There are three mainstream methods now, including 1) atropine eye drops; 2) "OK lens” that changes the curvature of the cornea; 3) defocusing lens that blurs the peripheral vision.
  • Orthokeratology lenses are hard contact lenses that are worn at night while sleeping. The principle is that through the contact between the lens and the cornea, pressure can be used to change the cornea to an ideal curvature. Patients need to wear it every night to maintain a stable effect. Once stopped, it will rebound. In addition, failure to handle the hygiene of the lens will increase the risk of infection or scratching the cornea.
  • the defocus lens uses optical technology to deviate the focus around the lens, blurring the peripheral vision and helping to restrain the elongation of the eyeballs.
  • due to the blurred peripheral vision it is easy to cause tripping, and special care should be taken when walking and going up and down stairs.
  • DISC defocusing soft contact lenses
  • DISC lenses have a positive effect on myopia control, as a contact lens, they are invasive in nature, and a large number of primary and middle school students cannot wear soft contact lenses due to eye health problems. For example, they may have lens intolerance issues or safety concerns, which may limit how long they can wear them.
  • An ophthalmic lens incorporating defocusing is very attractive and acceptable to all patients, as it is inherently non-invasive, easy to wear and very safe, just like conventional ophthalmic lenses.
  • spectacle lenses maximize wear time for optimal myopia control.
  • simply transferring the design concept of DISC mirror concentric rings to spectacle lenses will cause many problems.
  • concentric rings of different focal powers will have obvious seams at the joint positions. For contact lenses, these seams will not be easily observed in appearance due to the influence of tears.
  • the seam appears on the spectacle lens it will be very obvious in appearance, which will seriously affect the appearance and reduce the patient's willingness to wear it.
  • the invention discloses a ring-focus spectacle lens for controlling myopia deepening and a manufacturing method thereof. While the ring-focus spectacle lens can provide patients with clear vision, it also has multiple ring-shaped defocus areas to form an optical defocus effect. Since the ring focus spectacle lens has no seams between the concentric rings of different powers, the ring focus spectacle lens is as aesthetically pleasing as an ordinary spectacle lens.
  • the manufacturing method can use three front mold cores, one set of rear mold cores and a flat rear mold core to manufacture a series of ring-focus ophthalmic lenses with full power, thereby reducing the number of mold cores and production cost.
  • the manufacturing method provides a semi-finished lens/lens to manufacture ring-focus spectacle lenses with high degrees of myopia and high degrees of astigmatism. Since the market demand for high myopia and high astigmatism is small, it is not cost-effective to use a separate mold core.
  • the method of adding post-processing to the semi-finished lens not only greatly reduces the number of mold cores, but also reduces the inventory quantity of required lenses, thereby reducing the cost.
  • Certain embodiments of the present invention disclose a ring focus ophthalmic lens for controlling myopia progression comprising a convex anterior surface, a concave posterior surface, multiple corrective zones for imaging light onto the retina, and a Light rays are imaged in multiple astigmatism areas in front of the retina, the optical center of the front surface and the optical center of the back surface are located on the same optical axis, the correction area has a first refractive power, the astigmatism area has a second refractive power, and the first The second refractive power is greater than the first refractive power, and the correction zone and the astigmatism zone are alternately arranged in the ring focus spectacle lens.
  • the front surface includes a free-form surface composed of a plurality of first curved surfaces and a plurality of second curved surfaces, the plurality of first curved surfaces have the same radius of curvature, and the plurality of second curved surfaces have the same or different curvatures Radius, the radius of curvature of the first curved surface is greater than the radius of curvature of the second curved surface, the first curved surface and the second curved surface are staggered in the free curved surface, and the correction zone is at least composed of the first curved surface Defined, the astigmatism area is at least defined by the second curved surface.
  • first curved surface and the adjacent second curved surface are connected in a tangent continuous manner or a transitional curved surface, and in the tangent continuous manner, the first curved surface and the adjacent said second curved surface is tangentially continuous in such a way that the endpoints of the first curved surface coincide with the endpoints of the second curved surface at the point of intersection, and at said point of intersection the tangent to the first curved surface has the same slope as the tangent to the second curved surface, and
  • the extension of the line connecting the center of the first curved surface to the center of the second curved surface passes through the contact point, in the way of the transition curved surface, between the first curved surface and the adjacent second curved surface
  • a transition surface is provided, the starting point and the end point of the transition surface are respectively connected with the end point of the first curved surface and the starting point of the adjacent second curved surface, and the intersection between the first curved surface and the transition surface A joint, the curvature direction and size of the first curved surface and the
  • the previous curved surface and the latter curved surface are in the tangentially continuous manner
  • the previous curved surface and the subsequent curved surface are connected in the manner of the transition curved surface.
  • the threshold is 3.5D.
  • the first curved surface and the second curved surface adjacent to each other are connected in said tangent continuous manner.
  • the free-form surface is formed by a generatrix revolving along the optical axis, the generatrix is composed of a plurality of first curves and a plurality of second curves, each first curve has the curvature of the first curved surface Radius, each second curve has the radius of curvature of the second curved surface, the first curve and the second curve are staggered in the generatrix, the first curve turns to form the first curved surface, The second curved line is turned to form the second curved surface.
  • the radii of curvature of the plurality of second curved surfaces are constant or increase along the radial direction of the ring focus lens.
  • the second refractive power is 0.5D to 5D greater than the first refractive power.
  • the curvature of the correction zone of the anterior surface is 401 to 600 curves.
  • the curvature of the correction zone of the anterior surface is 201 to 400 curves.
  • the curvature of the correction zone of the anterior surface is 50 to 200 curves.
  • the rear surface is spherical, even-order aspheric or biconical.
  • the plurality of corrective zones includes a corrective central zone and a plurality of corrective concentric rings
  • the corrective central zone is located at the center of the ring focus ophthalmic lens
  • the plurality of astigmatic zones includes a plurality of astigmatic concentric rings, so The correction concentric rings and the astigmatism concentric rings are alternately arranged.
  • the diameter of the corrective central zone is 5 mm to 12 mm
  • the width of the corrective concentric rings is 0.5 mm to 2 mm
  • the width of the astigmatic concentric rings is 0.5 mm to 2 mm.
  • the plurality of astigmatic zones has 5-15 astigmatic concentric rings
  • the plurality of corrective zones includes 5-15 corrective concentric rings.
  • the center thickness of the ring focus spectacle lens is 1 mm to 3 mm, and the diameter of the ring focus spectacle lens is 60 mm to 80 mm.
  • Certain embodiments of the present invention disclose a method for manufacturing a series of said ring-focus spectacle lenses, said series of ring-focus spectacle lenses comprising a first collar of ring-focus spectacle lenses having different degrees of myopia and astigmatism Focus spectacle lenses, a second set of ring focus spectacle lenses with different degrees of myopia and astigmatism, a third set of ring focus lenses with different degrees of myopia and astigmatism, and a set of ring focus lenses with different degrees of myopia degree and astigmatism of the fourth set of ring-focus spectacle lenses, the myopia degree of the first set of ring-focus spectacle lenses is less than the myopia degree of the second set of ring-focus spectacle lenses, and the myopia degree of the second set of ring-focus spectacle lenses Less than the myopia degree of the third set of ring-focus spectacle lenses, the myopia degree of the third set of ring-focus spectacle lenses is less than the myopia degree of the fourth set of ring-focus spectacle lenses, the method includes:
  • a set of rear mold cores for generating rear surfaces with different radii of curvature comprising a plurality of rear mold cores, each rear mold core for generating a rear surface with a corresponding radius of curvature;
  • the rear surface of the semi-finished lens is processed to produce the fourth ring focus lens.
  • the first set of ring-focus spectacle lenses has a first refractive power of -2D to 0D
  • the second set of ring-focus spectacle lenses has a first refractive power of -4D to -2D.
  • Ring-focus spectacle lenses the third set of ring-focus spectacle lenses have ring-focus spectacle lenses with a first refractive power of -6D to -4D
  • the fourth set of ring-focus spectacle lenses has a first refractive power of less than -6D or a degree of astigmatism Less than -2D ring focus spectacle lenses.
  • the first correction zone has a curvature of 401 to 600 bends
  • the second correction zone has a curvature of 201 to 400 bends
  • the third correction zone has a curvature of 50 to 200 bends.
  • the set of back cores has 80 to 120 back cores.
  • the center thickness of the semi-finished lens is 2 mm to 20 mm.
  • FIG. 1 is a schematic structural view of a ring-focus spectacle lens according to an embodiment of the present invention
  • Fig. 2 is an optical effect diagram of a ring-focus spectacle lens according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a generatrix of a free-form surface according to an embodiment of the present invention.
  • Fig. 4 is a distribution diagram of a correction area and an astigmatism area according to an embodiment of the present invention.
  • Figure 5a and Figure 5b show the joining methods of different curved surfaces
  • FIG. 6 is a flow chart of a method for manufacturing a series of ring-focus ophthalmic lenses according to an embodiment of the present invention
  • Fig. 7 is a structural diagram of a mold according to an embodiment of the present invention.
  • Figure 8 is a schematic diagram of the cooperation of the front surface and the rear surface according to an embodiment of the present invention.
  • FIG. 9 is a real shot of a ring-focus spectacle lens according to an embodiment of the present invention.
  • Certain embodiments of the present invention disclose a ring focus ophthalmic lens for controlling myopia progression comprising a convex anterior surface, a concave posterior surface, multiple corrective zones for imaging light onto the retina, and a Light rays are imaged in multiple astigmatism areas in front of the retina, the optical center of the front surface and the optical center of the back surface are located on the same optical axis, the correction area has a first refractive power, the astigmatism area has a second refractive power, and the first The second refractive power is greater than the first refractive power, and the correction zone and the astigmatism zone are alternately arranged in the ring focus spectacle lens.
  • the front surface includes a free-form surface composed of a plurality of first curved surfaces and a plurality of second curved surfaces, the plurality of first curved surfaces have the same radius of curvature, and the plurality of second curved surfaces have the same or different curvatures Radius, the radius of curvature of the first curved surface is greater than the radius of curvature of the second curved surface, the first curved surface and the second curved surface are staggered in the free curved surface, and the correction zone is at least composed of the first curved surface Defined, the astigmatism area is at least defined by the second curved surface.
  • first curved surface and the adjacent second curved surface are connected in a tangent continuous manner or a transitional curved surface, and in the tangent continuous manner, the first curved surface and the adjacent said second curved surface is tangentially continuous in such a way that the endpoints of the first curved surface coincide with the endpoints of the second curved surface at the point of intersection, and at said point of intersection the tangent to the first curved surface has the same slope as the tangent to the second curved surface, and
  • the extension of the line connecting the center of the first curved surface to the center of the second curved surface passes through the contact point, in the way of the transition curved surface, between the first curved surface and the adjacent second curved surface
  • a transition surface is provided, the starting point and the end point of the transition surface are respectively connected with the end point of the first curved surface and the starting point of the adjacent second curved surface, and the intersection between the first curved surface and the transition surface A joint, the curvature direction and size of the first curved surface and the
  • the previous curved surface and the latter curved surface are in the tangentially continuous manner
  • the previous curved surface and the subsequent curved surface are connected in the manner of the transition curved surface.
  • the threshold is 3.5D.
  • the first curved surface and the second curved surface adjacent to each other are connected in said tangent continuous manner.
  • the free-form surface is formed by a generatrix revolving along the optical axis, the generatrix is composed of a plurality of first curves and a plurality of second curves, each first curve has the curvature of the first curved surface Radius, each second curve has the radius of curvature of the second curved surface, the first curve and the second curve are staggered in the generatrix, the first curve turns to form the first curved surface, The second curved line is turned to form the second curved surface.
  • the radii of curvature of the plurality of second curved surfaces are constant or increase along the radial direction of the ring focus lens.
  • the second refractive power is 0.5D to 5D greater than the first refractive power.
  • the curvature of the correction zone of the anterior surface is 401 to 600 curves.
  • the curvature of the correction zone of the anterior surface is 201 to 400 curves.
  • the curvature of the correction zone of the anterior surface is 50 to 200 curves.
  • the rear surface is spherical, even-order aspheric or biconical.
  • the plurality of corrective zones includes a corrective central zone and a plurality of corrective concentric rings
  • the corrective central zone is located at the center of the ring focus ophthalmic lens
  • the plurality of astigmatic zones includes a plurality of astigmatic concentric rings, so The correction concentric rings and the astigmatism concentric rings are alternately arranged.
  • the diameter of the corrective central zone is 5 mm to 12 mm
  • the width of the corrective concentric rings is 0.5 mm to 2 mm
  • the width of the astigmatic concentric rings is 0.5 mm to 2 mm.
  • the plurality of astigmatic zones has 5-15 astigmatic concentric rings
  • the plurality of corrective zones includes 5-15 corrective concentric rings.
  • the center thickness of the ring focus spectacle lens is 1 mm to 3 mm, and the diameter of the ring focus spectacle lens is 60 mm to 80 mm.
  • the ring focus spectacle lens 1 includes a convex front surface 11 and a concave rear surface 12 , multiple correction zones 101 and multiple astigmatism zones 102 .
  • the optical center 111 of the front surface 11 and the optical center 121 of the rear surface 12 are located on the same optical axis 10 .
  • the front surface 11 is a free curved surface 13 composed of a plurality of curved surfaces 131 and a plurality of curved surfaces 132 .
  • the curved surface 131 has a curvature radius RA
  • the curved surface 131 has a curvature radius RB
  • RA is greater than RB .
  • the back surface 12 can be a spherical surface or an even-order aspherical surface or a biconical surface.
  • the correcting area 101 is used to provide patients with clear vision, it images the light on the retina 201 , and has a first refractive power X 1 for correcting ametropia.
  • the rectification zone 101 is delimited by at least a curved surface 131 .
  • the astigmatism zone 102 is used to provide optical defocus, which images the light at a position 202 in front of the retina 201 and has a second refractive power X 2 of astigmatism.
  • the astigmatism zone 102 is defined by at least a curved surface 132 .
  • X 2 X 1 +m, m ⁇ [0.5D, 5D], X 2 is preferably 3.5D.
  • the correction area 101 and the astigmatism area 102 are arranged alternately in the radial direction in the ring focus lens 1 .
  • the free-form surface 13 can be formed by turning a smooth curve as the generatrix 14 along the optical axis 10 .
  • the bus bar 14 is composed of a plurality of curves 141 having a radius of curvature RA and a plurality of curves 142 having a radius of curvature RB .
  • the curve 141 and the curve 142 intersect in the bus bar 14 , the curve 141 is turned to form the curved surface 131 , and the curve 142 is turned to form the curved surface 132 .
  • the radius of curvature RB of the curve 142 is constant or increases along the radial direction of the ring focus lens 1 .
  • the plurality of corrective regions 101 includes a corrective central region 101a, a plurality of corrective concentric rings 101b, and a corrective concentric outer ring 101c.
  • the plurality of astigmatic regions 102 includes a plurality of astigmatic concentric rings 102a.
  • the corrective central zone 101a is located at the center of the ring focus spectacle lens 1 and is cylindrical and has a diameter D 1 , which is preferably 8mm.
  • the width W 1 of the correcting concentric ring 101b is preferably 1 mm.
  • the diameter D2 of the ring focus spectacle lens 1 is preferably 70 mm.
  • the width W2 of the astigmatic concentric ring 102a is preferably 1 mm.
  • the plurality of toric regions 102 preferably includes nine astigmatic concentric rings 102a.
  • the central thickness of the ring focus spectacle lens 1 is preferably 1.5 mm.
  • the front surface 11 is a free curved surface 13 composed of a curved surface 131 with RA and a curved surface 132 with RB , in order to solve the seam problem when the concentric rings of different optical powers (that is, the radii of curvature of the rings are different) meet , the rings can be connected in a tangent continuous way or in a transitional surface way.
  • the end point (i.e. the endpoint) of the curved surface 131 of the nth ring (such as the correction concentric ring 101b) and the starting point (ie the endpoint) of the curved surface 132 of the n+1th ring (such as the astigmatic concentric ring 102a) ) are coincident at the contact point, and the slope of the tangent line of the curved surface 131 and the curved surface 132 is the same at the contact point, and the extension line of the line connecting the centers of the curved surface 131 and the curved surface 132 passes through the contact point.
  • a transition surface is provided between the nth ring and the n+1th ring, and the starting point and the end point of the transition surface are respectively the same as the end point of the nth ring and the adjacent
  • the starting points of the n+1 rings are connected, at the junction point of the first curved surface and the transition surface, the curvature direction and magnitude of the first curved surface and the transition surface are the same, and at the junction of the second curved surface and the transition surface
  • the curvature direction and magnitude of the second curved surface and the transition surface are the same, and the curvature changes continuously on the transition surface.
  • the above-mentioned tangent continuous mode and transitional surface mode can be selected to connect adjacent rings (curved surfaces) according to needs.
  • the method of tangent continuity may be selected for all
  • the method of transitional curved surfaces may be selected for all
  • the connection method may be selected according to the diopter difference of the curved surfaces of adjacent rings.
  • the rings are connected in a tangential and continuous manner , so that the end point (i.e.
  • the end point) of the curved surface 131 of the nth ring (such as the correction concentric ring 101b) and the starting point (ie the end point) of the curved surface 132 of the n+1th ring (such as the astigmatic concentric ring 102a) coincide at the contact point,
  • the slope of the tangent line of the curved surface 131 and the curved surface 132 at the contact point is the same, and the extension line of the line connecting the centers of the curved surface 131 and the curved surface 132 passes through the contact point.
  • the curved surface 131 and the curved surface 132 are tangentially continuous, so the endpoint 1311 of the curved surface 131 coincides with the endpoint 1321 of the curved surface 132 at the contact point 1331, and the tangent line 1312 of the curved surface 131 and the tangent line of the curved surface 132 at the contact point 1331
  • the slopes of 1322 are the same, and the line O A OB connecting the center OA of the curved surface 131 with the center OB of the curved surface 132, and the extension line 1341 of 134 pass through the contact point 1331, thereby solving the seam problem.
  • the rings are connected in a continuous manner of curvature, between the first curved surface 131 and the second curved surface
  • the aforementioned threshold for example, 3.5D
  • the rings are connected in a continuous manner of curvature, between the first curved surface 131 and the second curved surface
  • the end point 1311 of the first curved surface 131 coincides with the starting point of the transition surface 133, and at this point both curvature and direction are the same; similarly, the start point 1321 of the second curved surface 132 coincides with the end point 1332 of the transition surface , and at that point both have the same curvature and direction.
  • the curvature changes continuously, from RA to RB .
  • the present invention provides a production method in which the front and rear molds cooperate with each other to form lenses with different correction degrees. This method greatly reduces the number of mold cores to reduce production costs.
  • Certain embodiments of the present invention disclose a method for manufacturing a series of said ring-focus spectacle lenses, said series of ring-focus spectacle lenses comprising a first collar of ring-focus spectacle lenses having different degrees of myopia and astigmatism Focus spectacle lenses, a second set of ring focus spectacle lenses with different degrees of myopia and astigmatism, a third set of ring focus lenses with different degrees of myopia and astigmatism, and a set of ring focus lenses with different degrees of myopia degree and astigmatism of the fourth set of ring-focus spectacle lenses, the myopia degree of the first set of ring-focus spectacle lenses is less than the myopia degree of the second set of ring-focus spectacle lenses, and the myopia degree of the second set of ring-focus spectacle lenses Less than the myopia degree of the third set of ring-focus spectacle lenses, the myopia degree of the third set of ring-focus spectacle lenses is less than the myopia degree of the fourth set of ring-focus spectacle lenses, the method includes:
  • a set of rear mold cores for generating rear surfaces with different radii of curvature comprising a plurality of rear mold cores, each rear mold core for generating a rear surface with a corresponding radius of curvature;
  • the rear surface of the semi-finished lens is processed to produce the fourth ring focus lens.
  • the first set of ring-focus spectacle lenses has a first refractive power of -2D to 0D
  • the second set of ring-focus spectacle lenses has a first refractive power of -4D to -2D.
  • Ring-focus spectacle lenses the third set of ring-focus spectacle lenses have ring-focus spectacle lenses with a first refractive power of -6D to -4D
  • the fourth set of ring-focus spectacle lenses has a first refractive power of less than -6D or a degree of astigmatism Less than -2D ring focus spectacle lenses.
  • the first correction zone has a curvature of 401 to 600 bends
  • the second correction zone has a curvature of 201 to 400 bends
  • the third correction zone has a curvature of 50 to 200 bends.
  • the set of back cores has 80 to 120 back cores.
  • the center thickness of the semi-finished lens is 2 mm to 20 mm.
  • FIG. 6 is a flowchart of a method for manufacturing a series of ring focus ophthalmic lenses according to an embodiment of the present invention.
  • the range of ring focus lenses includes multiple sets of ring focus lenses with different degrees of myopia and astigmatism.
  • a first front mold core for generating a first set of ring-focus spectacle lenses with a myopia of 0 to -2D is provided for generating a lens with myopia a second front core for a second set of ring focus spectacle lenses with powers from -2D to -4D, a third front core for creating a third set of ring focus spectacle lenses with myopia powers from -4D to -6D, and A set of back cores for creating back surfaces with different radii of curvature.
  • the first front core is used to create the front face with a first rectified curvature
  • the second front core is used to create a front face with a second rectified camber
  • the third front core is used to create a third rectified camber
  • the curvature of the first correction area is greater than the curvature of the second correction area
  • the curvature of the second correction area is greater than the curvature of the third correction area.
  • the set of rear cores includes a plurality of rear cores, each for generating a rear surface with a corresponding radius of curvature.
  • step S62 use the first front mold core and the set of rear mold cores to generate a first set of ring focus spectacle lenses, use the second front mold core and the set of rear mold cores to generate a second set of ring focus spectacle lenses, and use A third front mold core and the set of rear mold cores are used to produce a third set of ring-focus ophthalmic lenses.
  • a planar rear mold core for generating a fourth set of ring focus spectacle lenses having a degree of myopia less than -6D and an astigmatism less than -2D is provided, which is used to generate a planar back surface.
  • a third front core and a planar back mandrel are used to create a semi-finished lens having a front surface with a third correction zone curvature and a back surface that is planar, and the back surface of the semi-finished lens is machined to produce a fourth collar lens.
  • FIG. 7 is a structural diagram of a mold 70 according to an embodiment of the present invention, and the mold 70 includes a front core 71 and a rear core 72 .
  • the curvature of the correction zone on the front surface is preferably 500 curves, and all myopia degrees and astigmatism degrees All completed by cooperating rear surfaces 12 (R C1 , R C2 , R C3 , . . . ).
  • curvature of the correction area is preferably 300 curves, and all the degrees of myopia and astigmatism are also completed by the matching rear surface 12 (R C1 , R C2 , R C3 , ...) .
  • the curvature of the correction zone is preferably 100 bends, and all the degrees of myopia and astigmatism are also determined by the matching rear surface 12 (R C1 , R C2 , R C3 , ...) Finish. That is, the mold of the entire ophthalmic lens series includes three front cores 61 for generating the front surfaces 11 of three different free-form surfaces, and a set of rear cores 62 for generating the rear surface 12, and the two cooperate with each other to form a complete Manufactures most of the entire collection. Because the whole set of molds does not require a set of independent cores for each degree, this method greatly reduces the number of cores on the front and rear surfaces and reduces production costs.
  • the curvature of the correction area of the front surface is 500, and a rear surface with a curvature radius of 104.5819 can be used to form a lens with a flat correction area.
  • a curvature radius is 82.6233 of the rear surface, it can be Form a myopic lens with a correction zone of -1.5D.
  • the curvature of the correction area of the front surface is 300, and the back surface with a radius of curvature of 104.5819, a myopia lens with a correction area of -2.25D can be formed, and a back surface with a radius of curvature of 82.6233 can be formed.
  • a myopic lens with a correction area of -3.75D similarly, when the curvature of the correction area of the front surface is 100, and the rear surface with a radius of curvature of 104.5819, a myopia lens with a correction area of -4.5D can be formed.
  • a back surface with a radius of curvature of 82.6233 can form a myopic lens with a correction zone of -6D.
  • the degree of myopia ⁇ -6D or the degree of astigmatism ⁇ -2D is required, use a 100-curve as the front mold, and use a plane mold for the back mold, with a center thickness of preferably 8mm, so as to make the front surface with a 100-curve correction zone curvature and be a plane Semi-finished lenses on the rear surface of the lens, and then do secondary processing on the semi-finished products to produce ring-focus spectacle lenses with myopia ⁇ -6D or astigmatism ⁇ -2D. This is because there is less demand for this type of lens, and it is not cost-effective to produce it with a mold.
  • the semi-finished product method can reduce the number of mold cores and inventory, thereby reducing costs.
  • Fig. 9 is a real shot of a ring-focus spectacle lens according to an embodiment of the present invention, which clearly shows that there is no seam on the surface of the lens. Under the projection of the lens under the light, it can be seen that the correction area and the astigmatism area have obviously different refractive powers, which fully verifies the correctness and feasibility of the present invention.
  • the present invention has the following significant advantages.
  • the present invention provides a manufacturing-oriented seamless ring focus eyeglass lens design technology for controlling the deepening of myopia and a tangential and continuous design of concentric rings with different focal powers on the front surface, and its appearance is consistent with ordinary lenses without any joints. Seams for an aesthetically pleasing appearance.
  • correction area and astigmatism area are arranged in a staggered manner to reduce the peripheral vision detachment caused by optical defocus.
  • This manufacturing-oriented method uses three front cores, one set of rear cores and one flat rear core to manufacture a series of lenses with full power, which greatly reduces the number of cores and production cost.
  • the optimized distribution of refractive power not only provides patients with a clear vision, but also ensures that patients can receive positive optical defocus signals to the maximum extent, inhibiting eyeball elongation and improving vision.

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Eyeglasses (AREA)

Abstract

一种用于控制近视加深的环焦眼镜片（1）及其制造方法。环焦眼镜片（1）能为患者提供清晰视力的同时，也具有多个环形散焦区以形成光学离焦效果。由于通过相切连续的连接方式，不同光焦度的同心环之间不具有接缝，使环焦眼镜片（1）如普通眼镜片一样美观。制造方法使用三个前模芯（71）、一套后模芯（72）和一个平面后模芯以制造一系列的具有不同度数的环焦眼镜片（1），从而减少模芯数量和生产成本。同时，制造方法针对高近视度数高散光度数的需求，提供一种半成品镜片，这不仅大大减少模芯数量，也减少所需镜片的库存数量，从而降低成本。

Description

用于控制近视加深的环焦眼镜片及其制造方法 技术领域
本发明涉及眼镜片，具体涉及一种用于控制近视加深的环焦眼镜片及其制造方法。
背景技术
近视是常见的眼部疾病，近视主要是由于眼球过度拉长，使得远处物体的焦平面落在视网膜前方从而导致远处视力模糊。根据一项研究，到2050年，全球将有超过50％的近视人口。为了找到有效的干预措施来控制近视的发展，相关领域的学者已经进行了大量的研究。现在主流的方式有三种，其包括1)阿托品眼药水；2)改变角膜弧度的“OK镜”；3)令周边视野模糊的离焦镜。阿托品浓度越高效果越好，但是副作用也很明显：瞳孔变大、畏光、视近困难、过敏，浓度越高近视反弹越明显等，即便是低浓度的阿托品也需在密切随访监测下使用，安全性很难保证。俗称“OK镜”的角膜塑形镜是硬性隐形眼镜，于晚上睡觉时佩戴，原理是透过镜片与角膜的接触，利用压力令角膜改变至理想弧度，患者需每晚佩戴才能保持稳定疗效，一旦停用就会反弹，此外若未能处理好镜片的卫生，会增加感染或刮伤角膜的风险。离焦镜利用光学技术将镜片周边的焦点偏离，令周边视野模糊，有助于抑制眼球拉长，但由于周边视野模糊，容易造成绊倒，走路和上落楼梯需特别小心。
香港理工大学视光学院的研究小组最近进行的一项随机临床研究表明，与使用单焦隐形眼镜的儿童相比，佩戴散焦软性隐形眼镜(DISC)的中小学生近两年的近视加深较慢。当小学生每天戴8个小时的DISC镜片时，近视加深慢60％。DISC镜通过不同光焦度的交替同心环设计，为患者提供清晰的视力的同时，令患者不断的接收各个视觉距离的正向离焦讯号，抑制眼球拉长。尽管DISC镜对近视控制有正面效果，但作为一种隐 形眼镜，本质上是侵入性的，由于眼镜健康问题，大量的中小学生不能配戴软性隐形眼镜。例如，他们可能有镜片不耐受的问题或使用安全问题，这都可能会限制他们的佩戴时间。
结合了散焦功能的眼镜片对于所有患者来说都是有非常大的吸引力且易于接受的，因为它本质上与传统的眼镜片一样都是非侵入性，易于佩戴且非常安全。同时，眼镜片可以使佩戴时间最大化，以便实现最佳的近视控制。但是简单的将DISC镜同心环设计概念转移到眼镜片上，会产生许多问题。特别是不同光焦度的同心环在相接位置会出现明显的接缝，对于隐形眼镜来说，这些接缝会由于泪水的影响，在外观上不容易被观察到。但当接缝出现在眼镜片上时，外观上会非常明显，会严重影响美观，减低患者佩戴意欲。
发明内容
本发明公开一种用于控制近视加深的环焦眼镜片及其制造方法。该环焦眼镜片能为患者提供清晰视力的同时，也具有多个环形散焦区以形成光学离焦效果。由于该环焦眼镜片在不同光焦度的同心环之间不具有接缝，该环焦眼镜片如普通眼镜片一样美观。该制造方法可使用三个前模芯，一套后模芯和平面后模芯以制造一系列的具有全度数的环焦眼镜片，从而减少模芯数量和生产成本。同时，该制造方法提供一种半成品镜片/透镜以制造高近视度数和高散光度数的环焦眼镜片。由于高近视度数高散光度数的市场需求较小，使用单独模芯的方式不符合成本效益。使用该半成品镜片加后加工的方式不仅大大减少了模芯数量，也减少了所需镜片的库存数量，从而降低了成本。
本发明某些实施例公开一种用于控制近视加深的环焦眼镜片，其包括凸起的前表面、下凹的后表面、用于将光线成像于视网膜上的多个矫正区和用于将光线成像于视网膜前的多个散光区，前表面的光学中心和后表面的光学中心位于同一光轴上，所述矫正区具有第一屈光力，所述散光区具有第二屈光力，所述第二屈光力大于所述第一屈光力，所述矫正区和所述散光区在所述环焦眼镜片中交错排列。其中，所述前表面包括由多个第一 曲面和多个第二曲面组成的自由曲面，所述多个第一曲面具有相同的曲率半径，所述多个第二曲面具有相同或不同的曲率半径，所述第一曲面的曲率半径大于所述第二曲面的曲率半径，所述第一曲面和所述第二曲面在自由曲面中交错相接，所述矫正区至少由所述第一曲面限定，所述散光区至少由所述第二曲面限定。并且其中，所述第一曲面和相邻的所述第二曲面以相切连续的方式或者过渡曲面的方式相接，在所述相切连续的方式中，所述第一曲面和相邻的所述第二曲面相切连续，就此第一曲面的端点与第二曲面的端点在相接点处重合，并且在所述相接点处第一曲面的切线与第二曲面的切线的斜率相同，以及将第一曲面的圆心与第二曲面的圆心相连的连线的延长线通过所述相接点，在所述过渡曲面的方式中，所述第一曲面和相邻的所述第二曲面之间设置有一个过渡曲面，所述过渡曲面的起点和终点分别与所述第一曲面的终点和相邻的所述第二曲面的起点相接，在所述第一曲面和所述过渡曲面的相接点，所述第一曲面和所述过渡曲面的曲率方向和大小相同，在所述第二曲面和所述过渡曲面的相接点，所述第二曲面和所述过渡曲面的曲率方向和大小相同，所述过渡曲面上曲率连续变化。
根据某些实施例，从镜片中央沿径向往外，当前一曲面的屈光度减后一曲面的屈光度小于或等于阈值时，所述前一曲面和所述后一曲面以所述相切连续的方式相接，当所述前一曲面的屈光度减所述后一曲面的屈光度大于阈值时，所述前一曲面和所述后一曲面以所述过渡曲面的方式相接。
根据某些实施例所述阈值是3.5D。
根据某些实施例，彼此相邻的第一曲面和第二曲面都以所述相切连续的方式相接。
根据某些实施例，所述自由曲面由母线沿所述光轴回转形成，所述母线由多条第一曲线和多条第二曲线组成，每条第一曲线具有所述第一曲面的曲率半径，每条第二曲线具有所述第二曲面的曲率半径，所述第一曲线和所述第二曲线在所述母线中交错相接，所述第一曲线回转形成所述第一曲面，所述第二曲线回转形成所述第二曲面。
根据某些实施例，多个第二曲面的曲率半径沿环焦眼镜片的径向不变 或增加。
根据某些实施例，所述第二屈光力比所述第一屈光力大0.5D至5D。
根据某些实施例，当所述第一屈光力为-2D至0D中时，前表面的矫正区弯度为401弯至600弯。
根据某些实施例，当所述第一屈光力为-4D至-2D时，前表面的矫正区弯度为201弯至400弯。
根据某些实施例，当所述第一屈光力为-6D至-4D时，前表面的的矫正区弯度为50弯至200弯。
根据某些实施例，所述后表面为球面、偶次非球面或双锥面。
根据某些实施例，所述多个矫正区包括矫正中央区和多个矫正同心环，所述矫正中央区位于环焦眼镜片的中心，所述多个散光区包括多个散光同心环，所述矫正同心环与所述散光同心环交错排列。
根据某些实施例，矫正中央区的直径为5mm至12mm，矫正同心环的宽度为0.5mm至2mm，散光同心环的宽度为0.5mm至2mm。
根据某些实施例，所述多个散光区具有5-15个散光同心环，所述多个矫正区包括5-15个矫正同心环。
根据某些实施例，环焦眼镜片的中心厚度为1mm至3mm，环焦眼镜片的直径为60mm至80mm。
本发明某些实施例公开一种用于制造一系列的所述环焦眼镜片的方法，所述系列的环焦眼镜片包括具有不同近视度和散光度的环焦眼镜片的第一套环焦眼镜片，具有不同近视度和散光度的环焦眼镜片的第二套环焦眼镜片，具有不同近视度和散光度的环焦眼镜片的第三套环焦眼镜片，以及具有不同近视度和散光度的环焦眼镜片的第四套环焦眼镜片，第一套环焦眼镜片的近视度数小于第二套环焦眼镜片的近视度数、第二套环焦眼镜片的近视度数小于第三套环焦眼镜片的近视度数、第三套环焦眼镜片的近视度数小于第四套环焦眼镜片的近视度数，所述方法包括：
提供用于生成具有第一矫正区弯度的前表面的第一前模芯；
提供用于生成具有第二矫正区弯度的前表面的第二前模芯，其中，所述第一矫正区弯度大于所述第二矫正区弯度；
提供用于生成具有第三矫正区弯度的前表面的第三前模芯，其中，所述第二矫正区弯度大于所述第三矫正区弯度；
提供用于生成具有不同曲率半径的后表面的一套后模芯，其包括多个后模芯，每个后模芯用于生成具有相应的曲率半径的后表面；
提供用于生成为平面的后表面的平面后模芯；
使用所述第一前模芯和该套后模芯以生成所述第一套环焦眼镜片；
使用所述第二前模芯和该套后模芯以生成所述第二套环焦眼镜片；
使用所述第三前模芯和该套后模芯以生成所述第三套环焦眼镜片；
使用所述第三前模芯和所述平面后模芯以生成半成品透镜；以及
对所述半成品透镜的后表面加工以生成所述第四套环焦眼镜片。
根据某些实施例，所述第一套环焦眼镜片具有第一屈光力为-2D至0D的环焦眼镜片、所述第二套环焦眼镜片具有第一屈光力为-4D至-2D的环焦眼镜片、所述第三套环焦眼镜片具有第一屈光力为-6D至-4D的环焦眼镜片，所述第四套环焦眼镜片具有第一屈光力少于-6D或散光度数小于-2D的环焦眼镜片。
根据某些实施例，所述第一矫正区弯度为401弯至600弯、所述第二矫正区弯度为201弯至400弯、所述第三矫正区弯度为50弯至200弯。
根据某些实施例，该套后模芯具有80至120个后模芯。
根据某些实施例，半成品透镜的中心厚度为2mm至20mm。
附图说明
图1为根据本发明实施例的环焦眼镜片的结构示意图；
图2为根据本发明实施例的环焦眼镜片的光学效果图；
图3为根据本发明实施例的自由曲面的母线的示意图；
图4为根据本发明实施例的矫正区和散光区的分布图；
图5a和图5b示出不同曲面的相接方法；
图6为根据本发明实施例的一种用于制造一系列的环焦眼镜片的方法的流程图；
图7为根据本发明实施例的模具的结构图；
图8为根据本发明实施例的前表面和后表面相互配合的示意图；以及
图9为根据本发明实施例的环焦眼镜片的实拍图。
具体实施方式
下面结合附图以及实施例说明本发明的具体实施方式。
本发明某些实施例公开一种用于控制近视加深的环焦眼镜片，其包括凸起的前表面、下凹的后表面、用于将光线成像于视网膜上的多个矫正区和用于将光线成像于视网膜前的多个散光区，前表面的光学中心和后表面的光学中心位于同一光轴上，所述矫正区具有第一屈光力，所述散光区具有第二屈光力，所述第二屈光力大于所述第一屈光力，所述矫正区和所述散光区在所述环焦眼镜片中交错排列。其中，所述前表面包括由多个第一曲面和多个第二曲面组成的自由曲面，所述多个第一曲面具有相同的曲率半径，所述多个第二曲面具有相同或不同的曲率半径，所述第一曲面的曲率半径大于所述第二曲面的曲率半径，所述第一曲面和所述第二曲面在自由曲面中交错相接，所述矫正区至少由所述第一曲面限定，所述散光区至少由所述第二曲面限定。并且其中，所述第一曲面和相邻的所述第二曲面以相切连续的方式或者过渡曲面的方式相接，在所述相切连续的方式中，所述第一曲面和相邻的所述第二曲面相切连续，就此第一曲面的端点与第二曲面的端点在相接点处重合，并且在所述相接点处第一曲面的切线与第二曲面的切线的斜率相同，以及将第一曲面的圆心与第二曲面的圆心相连的连线的延长线通过所述相接点，在所述过渡曲面的方式中，所述第一曲面和相邻的所述第二曲面之间设置有一个过渡曲面，所述过渡曲面的起点和终点分别与所述第一曲面的终点和相邻的所述第二曲面的起点相接，在 所述第一曲面和所述过渡曲面的相接点，所述第一曲面和所述过渡曲面的曲率方向和大小相同，在所述第二曲面和所述过渡曲面的相接点，所述第二曲面和所述过渡曲面的曲率方向和大小相同，所述过渡曲面上曲率连续变化。
根据某些实施例，从镜片中央沿径向往外，当前一曲面的屈光度减后一曲面的屈光度小于或等于阈值时，所述前一曲面和所述后一曲面以所述相切连续的方式相接，当所述前一曲面的屈光度减所述后一曲面的屈光度大于阈值时，所述前一曲面和所述后一曲面以所述过渡曲面的方式相接。
根据某些实施例所述阈值是3.5D。
根据某些实施例，彼此相邻的第一曲面和第二曲面都以所述相切连续的方式相接。
根据某些实施例，所述自由曲面由母线沿所述光轴回转形成，所述母线由多条第一曲线和多条第二曲线组成，每条第一曲线具有所述第一曲面的曲率半径，每条第二曲线具有所述第二曲面的曲率半径，所述第一曲线和所述第二曲线在所述母线中交错相接，所述第一曲线回转形成所述第一曲面，所述第二曲线回转形成所述第二曲面。
根据某些实施例，多个第二曲面的曲率半径沿环焦眼镜片的径向不变或增加。
根据某些实施例，所述第二屈光力比所述第一屈光力大0.5D至5D。
根据某些实施例，当所述第一屈光力为-2D至0D中时，前表面的矫正区弯度为401弯至600弯。
根据某些实施例，当所述第一屈光力为-4D至-2D时，前表面的矫正区弯度为201弯至400弯。
根据某些实施例，当所述第一屈光力为-6D至-4D时，前表面的的矫正区弯度为50弯至200弯。
根据某些实施例，所述后表面为球面、偶次非球面或双锥面。
根据某些实施例，所述多个矫正区包括矫正中央区和多个矫正同心环，所述矫正中央区位于环焦眼镜片的中心，所述多个散光区包括多个散光同心环，所述矫正同心环与所述散光同心环交错排列。
根据某些实施例，矫正中央区的直径为5mm至12mm，矫正同心环的宽度为0.5mm至2mm，散光同心环的宽度为0.5mm至2mm。
根据某些实施例，所述多个散光区具有5-15个散光同心环，所述多个矫正区包括5-15个矫正同心环。
根据某些实施例，环焦眼镜片的中心厚度为1mm至3mm，环焦眼镜片的直径为60mm至80mm。
图1-5示出根据本发明实施例的一种用于控制近视加深的无接缝的环焦眼镜片。如图1-2所示，环焦眼镜片1包括凸起的前表面11和下凹的后表面12，多个矫正区101和多个散光区102。前表面11的光学中心111和后表面12的光学中心121位于同一条光轴10上。前表面11是由多个曲面131和多个曲面132组成的自由曲面13。曲面131具有曲率半径R A，曲面131具有曲率半径R B，R A大于R B，曲面131和曲面132在自由曲面13中交错相接。后表面12可以是球面也可以是偶次非球面或双锥面。矫正区101用于为患者提供清晰视力，其将光线成像于视网膜201上，并具有矫正屈光不正的第一屈光力X 1。矫正区101至少由曲面131限定。散光区102用于提供光学离焦，其将光线成像于视网膜201前的位置202，并具有散光的第二屈光力X 2。散光区102至少由曲面132限定。在本实施例，X 2＝X 1+m，m∈[0.5D,5D],X 2优选为3.5D。矫正区101与散光区102在环焦眼镜片1中沿径向交错排列。
如图3所示，自由曲面13可用一条顺滑的曲线作为母线14沿光轴10回转形成。母线14由具有曲率半径R A的多条曲线141和具有曲率半径R B的多条曲线142组成。曲线141和曲线142在母线14中交错相接，曲线141回转形成曲面131，曲线142回转形成曲面132。根据某些实施例，曲线142的曲率半径R B沿环焦眼镜片1的径向不变或增加。
如图4所示，多个矫正区101包括矫正中央区101a、多个矫正同心环 101b和矫正同心外环101c。多个散光区102包括多个散光同心环102a。根据本实施例，矫正中央区101a位于环焦眼镜片1的中心，为圆柱形并具有直径D 1，其优选为8mm。矫正同心环101b的宽度W 1优选为1mm。环焦眼镜片1的直径D 2优选为70mm。散光同心环102a的宽度W 2优选为1mm。多个散光区102优选包括9个散光同心环102a。环焦眼镜片1的中心厚度优选为1.5mm。
由于前表面11是由具有R A的曲面131和和R B的曲面132组成的自由曲面13，为了解决不同光焦度(即各环的曲率半径不同)的同心环相接时的接缝问题，环与环之间可以以相切连续的方式或者过渡曲面的方式相接。
在所述相切连续的方式中，第n环(例如矫正同心环101b)的曲面131的终点(即端点)与第n+1环(例如散光同心环102a)的曲面132的起点(即端点)在相接点处重合，且在相接点处曲面131和曲面132的切线的斜率相同，同时将曲面131和曲面132的圆心相连的连线的延长线通过相接点。
在所述过渡曲面的方式中，第n环和第n+1环之间设置有一个过渡曲面，所述过渡曲面的起点和终点分别与所述第n环的终点和相邻的所述第n+1环的起点相接，在所述第一曲面和所述过渡曲面的相接点，所述第一曲面和所述过渡曲面的曲率方向和大小相同，在所述第二曲面和所述过渡曲面的相接点，所述第二曲面和所述过渡曲面的曲率方向和大小相同，所述过渡曲面上曲率连续变化。
在实际应用中，可以根据需要选择上述相切连续方式和过渡曲面的方式来连接相邻的环(曲面)。例如，可以全部选择相切连续的方式，可以全部选择过渡曲面的方式，也可以根据相邻的环的曲面的屈光度的差值来选择连接方式。
根据一个实施例，从镜片中央沿径向往外，当前一曲面131的屈光度减后一曲面132的屈光度小于或等于一阈值(例如3.5D)时，环与环之间采用相切连续的方式连接，从而使第n环(例如矫正同心环101b)的曲面131的终点(即端点)与第n+1环(例如散光同心环102a)的曲面132的 起点(即端点)在相接点处重合，且在相接点处曲面131和曲面132的切线的斜率相同，同时将曲面131和曲面132的圆心相连的连线的延长线通过相接点。如图5a所示，曲面131和曲面132相切连续，就此曲面131的端点1311与曲面132的端点1321在相接点1331处重合，并且在相接点1331处曲面131的切线1312与曲面132的切线1322的斜率相同，以及将曲面131的圆心O A与曲面132的圆心O B相连的连线O AO B，134的延长线1341通过相接点1331，从而解决接缝问题。
从镜片中央沿径向往外，当前一曲面131的屈光度减后一曲面132的屈光度大于前述阈值(例如3.5D)时，环与环之间采用曲率连续的方式连接,在第一曲面131和第二曲面132之间有一个过渡曲面133。如图5b所示，第一曲面131的终点1311和过渡曲面133的起点重合，并在该点两者的曲率和方向都相同；同样，第二曲面132的起点1321和过渡曲面的终点1332重合，并在该点两者的曲率和方向都相同。在过渡曲面133上，曲率连续变化，从R A变化为R B。
进一步的面向制造，本发明提供了一种前后模互相配合形成不同矫正度数镜片的生产方式，该方式大大较少模芯数量从而降低生产成本。
本发明某些实施例公开一种用于制造一系列的所述环焦眼镜片的方法，所述系列的环焦眼镜片包括具有不同近视度和散光度的环焦眼镜片的第一套环焦眼镜片，具有不同近视度和散光度的环焦眼镜片的第二套环焦眼镜片，具有不同近视度和散光度的环焦眼镜片的第三套环焦眼镜片，以及具有不同近视度和散光度的环焦眼镜片的第四套环焦眼镜片，第一套环焦眼镜片的近视度数小于第二套环焦眼镜片的近视度数、第二套环焦眼镜片的近视度数小于第三套环焦眼镜片的近视度数、第三套环焦眼镜片的近视度数小于第四套环焦眼镜片的近视度数，所述方法包括：
提供用于生成具有第一矫正区弯度的前表面的第一前模芯；
提供用于生成具有第二矫正区弯度的前表面的第二前模芯，其中，所述第一矫正区弯度大于所述第二矫正区弯度；
提供用于生成具有第三矫正区弯度的前表面的第三前模芯，其中，所 述第二矫正区弯度大于所述第三矫正区弯度；
提供用于生成具有不同曲率半径的后表面的一套后模芯，其包括多个后模芯，每个后模芯用于生成具有相应的曲率半径的后表面；
提供用于生成为平面的后表面的平面后模芯；
使用所述第一前模芯和该套后模芯以生成所述第一套环焦眼镜片；
使用所述第二前模芯和该套后模芯以生成所述第二套环焦眼镜片；
使用所述第三前模芯和该套后模芯以生成所述第三套环焦眼镜片；
使用所述第三前模芯和所述平面后模芯以生成半成品透镜；以及
对所述半成品透镜的后表面加工以生成所述第四套环焦眼镜片。
根据某些实施例，所述第一套环焦眼镜片具有第一屈光力为-2D至0D的环焦眼镜片、所述第二套环焦眼镜片具有第一屈光力为-4D至-2D的环焦眼镜片、所述第三套环焦眼镜片具有第一屈光力为-6D至-4D的环焦眼镜片，所述第四套环焦眼镜片具有第一屈光力少于-6D或散光度数小于-2D的环焦眼镜片。
根据某些实施例，所述第一矫正区弯度为401弯至600弯、所述第二矫正区弯度为201弯至400弯、所述第三矫正区弯度为50弯至200弯。
根据某些实施例，该套后模芯具有80至120个后模芯。
根据某些实施例，半成品透镜的中心厚度为2mm至20mm。
图6为根据本发明实施例的一种用于制造一系列的环焦眼镜片的方法的流程图。该系列的环焦眼镜片包括具有不同近视度和散光度的多套环焦眼镜片。当近视度数大于-6D和散光度数大于-2D时，根据步骤S61，提供用于生成具有近视度为0至-2D的第一套环焦眼镜片的第一前模芯、用于生成具有近视度为-2D至-4D的第二套环焦眼镜片的第二前模芯、用于生成具有近视度为-4D至-6D的第三套环焦眼镜片的第三前模芯，以及用于生成具有不同曲率半径的后表面的一套后模芯。第一前模芯用于生成具有第一矫正区弯度的前表面，第二前模芯用于生成具有第二矫正区弯度的前表面，第三前模芯用于生成具有第三矫正区弯度的前表面，第一矫正区弯 度大于第二矫正区弯度，第二矫正区弯度大于第三矫正区弯度。该套后模芯包括多个后模芯，每个后模芯用于生成具有相应的曲率半径的后表面。
根据步骤S62，使用第一前模芯和该套后模芯以生成第一套环焦眼镜片，使用第二前模芯和该套后模芯以生成第二套环焦眼镜片，以及使用第三前模芯和该套后模芯以生成第三套环焦眼镜片。
当近视度数小于-6D和散光度数小于-2D时，根据步骤S63，提供用于生成具有近视度数小于-6D和散光度数小于-2D的第四套环焦眼镜片的平面后模芯，其用于生成为平面的后表面。使用第三前模芯和平面后模芯以生成具有第三矫正区弯度的前表面和为平面的后表面的半成品透镜，以及对半成品透镜的后表面加工以生成第四套环焦眼镜片。第一套环焦眼镜片、第二套环焦眼镜片、第三套环焦眼镜片和第四套环焦眼镜片中的环焦眼镜片在近视度和散光度上没有重叠。
图7为根据本发明实施例的模具70的结构图，该摸具70包括前模芯71和后模芯72。在本实施例中，如图8所示，当环焦眼镜片1的第一屈光力X 1∈[-2D,0D]时，前表面的矫正区弯度优选为500弯，所有近视度数和散光度数都由相配合的后表面12(R C1，R C2，R C3，…)完成。在本实施例中，矫正区弯度可通过以下经验公式计算：矫正区弯度＝(0.532/R A)x100,R A的单位为米，但也可通过本领域的其它相关的公式计算。当X 1∈[-4D,-2D]时，矫正区弯度优选为300弯，所有近视度数和散光度数同样都由上述相配合的后表面12(R C1，R C2，R C3，…)完成。当X 1∈[-6D,-4D]时，矫正区弯度优选为100弯，所有近视度数和散光度数也同样都由上述相配合的后表面12(R C1，R C2，R C3，…)完成。即整个眼镜片系列的模具包括三个用于生成三个不同自由曲面的前表面11的前模芯61，和一套用于生成后表面12的后模芯62，两者互相配合就可以完整地制造整个系列的大部分。因为整套模具不需要每个度数都有一套独立的模芯，所以该方法大大减少了前后表面模芯的数量，降低了生产成本。
根据某些实施例，前表面的矫正区弯度为500弯，配合一个曲率半径为104.5819的后表面，就可以组成一个矫正区为平光的镜片，配合一个曲率半径为82.6233的后表面时，就可以组成一个矫正区为-1.5D的近视 镜片。当前表面的矫正区弯度为300弯时，同样配合曲率半径为104.5819的后表面时，就可以组成一个矫正区为-2.25D的近视镜片，配合一个曲率半径为82.6233的后表面时，就可以组成一个矫正区为-3.75D的近视镜片；同理当前表面的矫正区弯度为100弯时，同样配合曲率半径为104.5819的后表面时，就可以组成一个矫正区为-4.5D的近视镜片，配合一个曲率半径为82.6233的后表面时，就可以组成一个矫正区为-6D的近视镜片。
当需要近视度数<-6D或散光度数<-2D时，使用100弯的做前模，后模用平面的，中心厚度优选8mm，以做出具有100弯的矫正区弯度的前表面和为平面的后表面的半成品镜片，然后再对该半成品做二次加工以生成近视度数<-6D或散光度数<-2D的环焦眼镜片。这是由于该类镜片的需求较少，用模具生产不符合成本效益，半成品的方式可以减少模芯数量和库存，从而降低成本。
图9为根据本发明实施例的环焦眼镜片的实拍图，其可以清晰示出镜片表面无任何接缝。在灯光下镜片的投影，可以看到矫正区和散光区有明显不同的光焦度，这充分验证了本发明的正确性和可行性。
与现有技术相比，本发明具有以下显著的优点。
1.本发明提供了用于控制近视加深的一种面向制造的无接缝环焦眼镜片设计技术以及前表面的不同光焦度同心环相切连续设计，其外观与普通镜片一致无任何接缝，具有美观的外观。
2.矫正区和散光区交错排列，减少由于光学离焦而产生的周边视觉剥离。
3.该面向制造方法使用三个前模芯、一套后模芯和一个平面后模芯以制造一系列具有完整度数的镜片，这大大减少模芯数量和生产成本。
4.优化的屈光力分布，不仅为患者提供清晰的视野，也最大化的保证患者可以接受到正向光学离焦讯号，抑制眼球拉长，改善视力。
虽然以上描述了本发明的具体实施方式，但是本领域的技术人员应当理解，这仅仅是举例说明，在不背离本发明的原理和实质的前提下，可以对这些实施的方式做出一些变更和修改，因此，本发明的保护范围由所附 的权利要求书限定。

Claims (20)

  1. 一种用于控制近视加深的环焦眼镜片，其包括凸起的前表面、下凹的后表面、用于将光线成像于视网膜上的多个矫正区和用于将光线成像于视网膜前的多个散光区，前表面的光学中心和后表面的光学中心位于同一光轴上，所述矫正区具有第一屈光力，所述散光区具有第二屈光力，所述第二屈光力大于所述第一屈光力，所述矫正区和所述散光区在所述环焦眼镜片中交错排列；
    其中，所述前表面包括由多个第一曲面和多个第二曲面组成的自由曲面，所述多个第一曲面具有相同的曲率半径，所述多个第二曲面具有相同或不同的曲率半径，所述第一曲面的曲率半径大于所述第二曲面的曲率半径，所述第一曲面和所述第二曲面在自由曲面中交错相接，所述矫正区至少由所述第一曲面限定，所述散光区至少由所述第二曲面限定；
    并且其中，所述第一曲面和相邻的所述第二曲面以相切连续的方式或者过渡曲面的方式相接，
    在所述相切连续的方式中，所述第一曲面和相邻的所述第二曲面相切连续，就此第一曲面的端点与第二曲面的端点在相接点处重合，并且在所述相接点处第一曲面的切线与第二曲面的切线的斜率相同，以及将第一曲面的圆心与第二曲面的圆心相连的连线的延长线通过所述相接点，
    在所述过渡曲面的方式中，所述第一曲面和相邻的所述第二曲面之间设置有一个过渡曲面，所述过渡曲面的起点和终点分别与所述第一曲面的终点和相邻的所述第二曲面的起点相接，在所述第一曲面和所述过渡曲面的相接点，所述第一曲面和所述过渡曲面的曲率方向和大小相同，在所述第二曲面和所述过渡曲面的相接点，所述第二曲面和所述过渡曲面的曲率方向和大小相同，所述过渡曲面上曲率连续变化。
  2. 根据权利要求1所述的环焦眼镜片，其中，从镜片中央沿径向往外，当前一曲面的屈光度减后一曲面的屈光度小于或等于阈值时，所述前一曲面和所述后一曲面以所述相切连续的方式相接，当所述前一曲面的屈光度减所述后一曲面的屈光度大于阈值时，所述前一曲面和所述后一曲面以所 述过渡曲面的方式相接。
  3. 根据权利要求1所述的环焦眼镜片，其中，所述阈值是3.5D。
  4. 根据权利要求1所述的环焦眼镜片，其中，彼此相邻的第一曲面和第二曲面都以所述相切连续的方式相接。
  5. 根据权利要求1-4中任何一项所述的环焦眼镜片，其中，所述自由曲面由母线沿所述光轴回转形成，所述母线由多条第一曲线和多条第二曲线组成，每条第一曲线具有所述第一曲面的曲率半径，每条第二曲线具有所述第二曲面的曲率半径，所述第一曲线和所述第二曲线在所述母线中交错相接，所述第一曲线回转形成所述第一曲面，所述第二曲线回转形成所述第二曲面。
  6. 根据权利要求1-4中任何一项所述的环焦眼镜片，其中，多个第二曲面的曲率半径沿环焦眼镜片的径向不变或增加。
  7. 根据权利要求1-4中任何一项所述的环焦眼镜片，其中，所述第二屈光力比所述第一屈光力大0.5D至5D。
  8. 根据权利要求1-4中任何一项所述的环焦眼镜片，其中，当所述第一屈光力为-2D至0D中时，前表面的矫正区弯度为401弯至600弯。
  9. 根据权利要求1-4中任何一项所述的环焦眼镜片，其中，当所述第一屈光力为-4D至-2D时，前表面的矫正区弯度为201弯至400弯。
  10. 根据权利要求1-4中任何一项所述的环焦眼镜片，其中，当所述第一屈光力为-6D至-4D时，前表面的矫正区弯度为50弯至200弯。
  11. 根据权利要求1-4中任何一项所述的环焦眼镜片，其中，所述后表面为球面、偶次非球面或双锥面。
  12. 根据权利要求1-4中任何一项所述的环焦眼镜片，其中，所述多个矫正区包括矫正中央区和多个矫正同心环，所述矫正中央区位于环焦眼镜片的中心，所述多个散光区包括多个散光同心环，所述矫正同心环与所述散光同心环交错排列。
  13. 根据权利要求12所述的环焦眼镜片，其中，矫正中央区的直径为 5mm至12mm，矫正同心环的宽度为0.5mm至2mm，散光同心环的宽度为0.5mm至2mm。
  14. 根据权利要求12所述的环焦眼镜片，其中，所述多个散光区具有5-15个散光同心环，所述多个矫正区包括5-15个矫正同心环。
  15. 根据权利要求1-4中任何一项所述的环焦眼镜片，其中，环焦眼镜片的中心厚度为1mm至3mm，环焦眼镜片的直径为60mm至80mm。
  16. 一种用于制造一系列的根据权利要求1所述的环焦眼镜片的方法，所述系列的环焦眼镜片包括具有不同近视度和散光度的环焦眼镜片的第一套环焦眼镜片，具有不同近视度和散光度的环焦眼镜片的第二套环焦眼镜片，具有不同近视度和散光度的环焦眼镜片的第三套环焦眼镜片，以及具有不同近视度和散光度的环焦眼镜片的第四套环焦眼镜片，第一套环焦眼镜片的近视度数小于第二套环焦眼镜片的近视度数、第二套环焦眼镜片的近视度数小于第三套环焦眼镜片的近视度数、第三套环焦眼镜片的近视度数小于第四套环焦眼镜片的近视度数，所述方法包括：
    提供用于生成具有第一矫正区弯度的前表面的第一前模芯；
    提供用于生成具有第二矫正区弯度的前表面的第二前模芯，其中，所述第一矫正区弯度大于所述第二矫正区弯度；
    提供用于生成具有第三矫正区弯度的前表面的第三前模芯，其中，所述第二矫正区弯度大于所述第三矫正区弯度；
    提供用于生成具有不同曲率半径的后表面的一套后模芯，其包括多个后模芯，每个后模芯用于生成具有相应的曲率半径的后表面；
    提供用于生成为平面的后表面的平面后模芯；
    使用所述第一前模芯和该套后模芯以生成所述第一套环焦眼镜片；
    使用所述第二前模芯和该套后模芯以生成所述第二套环焦眼镜片；
    使用所述第三前模芯和该套后模芯以生成所述第三套环焦眼镜片；
    使用所述第三前模芯和所述平面后模芯以生成半成品透镜；以及
    对所述半成品透镜的后表面加工以生成所述第四套环焦眼镜片。
  17. 根据权利要求16所述的方法，其中，所述第一套环焦眼镜片具有第一屈光力为-2D至0D的环焦眼镜片、所述第二套环焦眼镜片具有第一屈光力为-4D至-2D的环焦眼镜片、所述第三套环焦眼镜片具有第一屈光力为-6D至-4D的环焦眼镜片，所述第四套环焦眼镜片具有第一屈光力少于-6D或散光度数小于-2D的环焦眼镜片。
  18. 根据权利要求16所述的方法，其中，所述第一矫正区弯度为401弯至600弯、所述第二矫正区弯度为201弯至400弯、所述第三矫正区弯度为50弯至200弯。
  19. 根据权利要求16所述的方法，其中，该套后模芯具有80至120个后模芯。
  20. 根据权利要求16所述的方法，其中，半成品透镜的中心厚度为2mm至20mm。
PCT/CN2022/079507 2021-07-28 2022-03-07 用于控制近视加深的环焦眼镜片及其制造方法 WO2023005211A1 (zh)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CA3227573A CA3227573A1 (en) 2021-07-28 2022-03-07 Ring focus spectacle lens for controlling myopia progression, and manufacturing method therefor
JP2024504238A JP2024525968A (ja) 2021-07-28 2022-03-07 近視の進行を制御するためのリングフォーカス眼鏡レンズ及びその製造方法
KR1020247006833A KR20240035896A (ko) 2021-07-28 2022-03-07 근시 진행 제어용 링 초점 안경 렌즈 및 그 제조 방법
AU2022317671A AU2022317671A1 (en) 2021-07-28 2022-03-07 Ring focus spectacle lens for controlling myopia progression, and manufacturing method therefor
EP22847831.9A EP4379456A1 (en) 2021-07-28 2022-03-07 Ring focus spectacle lens for controlling myopia progression, and manufacturing method therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HK32021035686.3 2021-07-28
HK32021035686 2021-07-28

Publications (1)

Publication Number Publication Date
WO2023005211A1 true WO2023005211A1 (zh) 2023-02-02

Family

ID=82196238

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/079507 WO2023005211A1 (zh) 2021-07-28 2022-03-07 用于控制近视加深的环焦眼镜片及其制造方法

Country Status (7)

Country Link
EP (1) EP4379456A1 (zh)
JP (1) JP2024525968A (zh)
KR (1) KR20240035896A (zh)
CN (2) CN114706234A (zh)
AU (1) AU2022317671A1 (zh)
CA (1) CA3227573A1 (zh)
WO (1) WO2023005211A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116027571A (zh) * 2022-12-06 2023-04-28 首都医科大学附属北京同仁医院 一种近视离焦镜片及近视离焦眼镜
CN116699871A (zh) * 2023-05-29 2023-09-05 江苏全真光学科技股份有限公司 一种多点离焦变色眼镜片及其制备方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996008745A1 (en) * 1994-09-16 1996-03-21 Permeable Technologies, Inc. Multifocal contact lens and method for preparing
CN101090686A (zh) * 2004-09-30 2007-12-19 香港理工大学 光学治疗方法
US20120062836A1 (en) * 2010-09-09 2012-03-15 Tse Yan Yin Method and system for retarding the progression of myopia
TW201344282A (zh) * 2012-04-26 2013-11-01 Jau Cyen Spectacles Co Ltd 非球面超薄遠視鏡片
CN105511105A (zh) * 2016-02-01 2016-04-20 彭孟跑 一种全景360°环焦镜片、模具及其制作方法
CN110068937A (zh) * 2018-01-22 2019-07-30 庄臣及庄臣视力保护公司 具有用于近视控制的光学非同轴区的眼科镜片
CN110208962A (zh) * 2019-05-13 2019-09-06 江苏点进光学眼镜有限公司 一种环焦面控近视舒缓镜片

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996008745A1 (en) * 1994-09-16 1996-03-21 Permeable Technologies, Inc. Multifocal contact lens and method for preparing
CN101090686A (zh) * 2004-09-30 2007-12-19 香港理工大学 光学治疗方法
US20120062836A1 (en) * 2010-09-09 2012-03-15 Tse Yan Yin Method and system for retarding the progression of myopia
TW201344282A (zh) * 2012-04-26 2013-11-01 Jau Cyen Spectacles Co Ltd 非球面超薄遠視鏡片
CN105511105A (zh) * 2016-02-01 2016-04-20 彭孟跑 一种全景360°环焦镜片、模具及其制作方法
CN110068937A (zh) * 2018-01-22 2019-07-30 庄臣及庄臣视力保护公司 具有用于近视控制的光学非同轴区的眼科镜片
CN110208962A (zh) * 2019-05-13 2019-09-06 江苏点进光学眼镜有限公司 一种环焦面控近视舒缓镜片

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116027571A (zh) * 2022-12-06 2023-04-28 首都医科大学附属北京同仁医院 一种近视离焦镜片及近视离焦眼镜
CN116027571B (zh) * 2022-12-06 2023-08-29 首都医科大学附属北京同仁医院 一种近视离焦镜片及近视离焦眼镜
CN116699871A (zh) * 2023-05-29 2023-09-05 江苏全真光学科技股份有限公司 一种多点离焦变色眼镜片及其制备方法
CN116699871B (zh) * 2023-05-29 2023-11-10 江苏全真光学科技股份有限公司 一种多点离焦变色眼镜片及其制备方法

Also Published As

Publication number Publication date
EP4379456A1 (en) 2024-06-05
AU2022317671A1 (en) 2024-02-29
JP2024525968A (ja) 2024-07-12
KR20240035896A (ko) 2024-03-18
CN217982048U (zh) 2022-12-06
CN114706234A (zh) 2022-07-05
CA3227573A1 (en) 2023-02-02

Similar Documents

Publication Publication Date Title
JP7472225B2 (ja) レンズ要素
US5652638A (en) Concentric annular ring lens designs for astigmatism
WO2023005211A1 (zh) 用于控制近视加深的环焦眼镜片及其制造方法
TW201333579A (zh) 多焦點光學鏡片
CN114994946A (zh) 一种具有环带分布微环曲面透镜阵列眼镜片及其设计方法
CN107728338B (zh) 角膜塑形镜
CN215117038U (zh) 无级离焦镜片与框架眼镜
CN114911073A (zh) 无级离焦镜片与框架眼镜
CN215117039U (zh) 无级离焦镜片与框架眼镜
CN114911075A (zh) 无级离焦镜片与框架眼镜

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22847831

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2024504238

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 3227573

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2401000565

Country of ref document: TH

WWE Wipo information: entry into national phase

Ref document number: AU2022317671

Country of ref document: AU

ENP Entry into the national phase

Ref document number: 20247006833

Country of ref document: KR

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2022847831

Country of ref document: EP

Ref document number: 1020247006833

Country of ref document: KR

ENP Entry into the national phase

Ref document number: 2022317671

Country of ref document: AU

Date of ref document: 20220307

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2022847831

Country of ref document: EP

Effective date: 20240228