WO2023065556A1 - 一种眼镜片及框架眼镜 - Google Patents

一种眼镜片及框架眼镜 Download PDF

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Publication number
WO2023065556A1
WO2023065556A1 PCT/CN2022/072734 CN2022072734W WO2023065556A1 WO 2023065556 A1 WO2023065556 A1 WO 2023065556A1 CN 2022072734 W CN2022072734 W CN 2022072734W WO 2023065556 A1 WO2023065556 A1 WO 2023065556A1
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WIPO (PCT)
Prior art keywords
lens
spectacle lens
control
lenses
spectacle
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2022/072734
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English (en)
French (fr)
Inventor
夏日升
厉以宇
陈浩
瞿佳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wenzhou Medical University
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Wenzhou Medical University
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 Wenzhou Medical University filed Critical Wenzhou Medical University
Priority to AU2022372574A priority Critical patent/AU2022372574A1/en
Priority to US18/563,431 priority patent/US12111516B2/en
Priority to CA3219574A priority patent/CA3219574C/en
Priority to EP22882182.3A priority patent/EP4296762B1/en
Publication of WO2023065556A1 publication Critical patent/WO2023065556A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/022—Ophthalmic lenses having special refractive features achieved by special materials or material structures
    • 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
    • G02C7/024—Methods of designing ophthalmic lenses
    • 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
    • G02C7/024—Methods of designing ophthalmic lenses
    • G02C7/028—Special mathematical design techniques
    • 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
    • G02C7/08—Auxiliary lenses; Arrangements for varying focal length
    • 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

Definitions

  • the present disclosure relates to the field of ophthalmic equipment, and more particularly to an ophthalmic lens intended to be worn in front of the human eye to inhibit the development of abnormalities of the eyeglasses, such as myopia or hyperopia.
  • the representative of the early myopia slowing and controlling functional lens is the peripheral continuous defocusing lens.
  • the refractive power of the spherical lens around the lens is higher than that of the central area of the lens.
  • the spherical lens refractive power gradually increases along each radial direction.
  • the continuous change of surface curvature is the main reason for the progressive increase of spherical lens refractive power.
  • the continuous change of the surface curvature of the lens must be accompanied by the appearance of the difference of the main curvature of the surface, and the difference of the main curvature will mainly show the astigmatism distribution of the curved surface.
  • the astigmatic aberration occurs simultaneously, which in turn leads to a reduction in the image quality of the lens.
  • peripheral continuous defocus lenses when the user wears such lenses, if the eyes see objects from the defocus area where the refractive power of the peripheral spherical lens increases, the visual effect will be much blurred compared to the central optical area of the lens. And when the eyes see objects from the central optical zone, the peripheral vision will also have the effect of peripheral vision blurring because it passes through the peripheral defocus area.
  • This peripheral vision blurring mechanism is considered to be closely related to the control of myopia progression.
  • the obvious defect of the peripheral continuous defocusing lens is that the change distribution of the refractive power of the spherical lens will inevitably cause the continuous change of the visual magnification, so there will be distortion and distortion in the whole field of view, which will bring discomfort to the wearer.
  • the new type of myopia slowing and controlling functional lens mainly adopts the peripheral discrete multi-point defocus design, and a series of microlenses are scattered and arranged around the lens according to certain rules, and the positive addition power of the microlenses is used to form the second diopter zone, for example Chinese patent CN104678572A spectacle lens is disclosed.
  • the first refraction zone without microlens distribution has the conventional function of focusing the image on the retina of the eye, and at the same time, the second refraction zone has the function of focusing the image in front of the retina of the eye, thus To inhibit the development of myopia.
  • the microlenses In order to be able to image on the retina and in front of the retina at the same time, the microlenses must be separated from each other by a certain distance, and the spaced area works as the first refractive zone, so the area filling rate of the microlenses in the microstructure area usually cannot exceed 60 %, in order to make the lens effective. It is precisely because of the limited filling rate of the microlens that the peripheral discrete multi-point defocus lens cannot deeply modulate the imaging quality of the image plane on the retina. At the same time, in the case of using the peripheral discrete lens, images (double images) exist on the retina and in front of the retina, which easily causes eye accommodation disorder.
  • one of the objects of the present disclosure is to provide a spectacle lens capable of suppressing the development of ametropia of the eye while ensuring sufficient visibility and a good wearing feeling.
  • the ophthalmic lens includes an optic zone and a control zone.
  • the optical zone provides correction for vision in patients with refractive errors.
  • the optic zones form a base surface of the ophthalmic lens and have a refractive power based on a prescription of an eyeball, the optic zones including a central optic zone located in a central region of the ophthalmic lens.
  • a control zone surrounds the central optical zone and includes a plurality of control subunits attached to each other. Each control subunit has a centrally located first lens and a plurality of second lenses surrounding the first lens. The first lens and the second lens have different refractive powers.
  • Each second lens has a regular polygonal surface shape, at least a part of the second lenses in the plurality of control subunits are in surface contact with each other through the surface where the sides of the regular polygon are located, and the plurality of control subunits
  • the unit is configured such that the wavefront formed by it can be superimposed on the working focal plane of the optical zone to form a uniform diffuse spot, and the diffuse spot can form a blurred peripheral vision image.
  • Optic zones designed based on the eye's prescription ensure clear vision when the eye is looking straight ahead or through other lens areas that have optic zones.
  • the second lens passing through the control area can form a blurred peripheral image in front and/or behind the retina, thereby avoiding eyeball stimulation, ensuring that the eye axis of the eye does not change, and the vision does not deteriorate.
  • the control area used for adjustment can have Large filling rate, therefore, the control area can deeply modulate the imaging quality of the image plane on the retina to form a blurred image and avoid double images.
  • ADD is the additional refractive power of the first lens, which is taken from 0-0.3D any value.
  • the second lens at the periphery of the control subunit has a regular polygonal surface shape, and each control subunit is bonded by the second lens, therefore, the first lens surrounded by the second lens is a regular polygon.
  • the face shape exists and can be arranged in a regular form in the circumferential direction on the spectacle lens.
  • each first lens of the control unit When the refractive power of each first lens of the control unit is set to be substantially equal to the refractive power of the corresponding optical zone, the first lens now has a function equivalent to that of the optical zone. When the wearer looks in any direction, a clear image can be formed.
  • said at least a part of said first lenses in a plurality of said control subunits are in surface contact with all of the second lenses in the control subunits.
  • the second lens can be processed first.
  • the surface of a lens facing each second lens is processed. Even, when the additional refractive power of the first lens is 0, the processing personnel only need to process the second lens. Obviously, this is beneficial to improve the processing speed and processing quality.
  • the second lens is a regular lens, and the normal direction of the second lens at its center is generally the same as the normal direction of the base surface at that location.
  • the wavelets of the second projection lens will not be confocal with each other, the central rays of the wavelets corresponding to the second lens of this form will all face the same image point position formed by the basic curved surface on the retina, ensuring that the wavelets When it spreads to the retina, it will form a stack at the image point, and the ideal image point will be diffused into a diffuse spot, so that the image quality will be significantly reduced. This achieves the best blurred imaging results.
  • the apex of the second lens is formed on the base surface.
  • the second lens is a convex lens or a concave lens arranged on the object-side surface of the spectacle lens away from the eyeball, and there is a distance between the six edges of the top surface of the second lens and the base surface.
  • arranging the apex of the second lens on the base surface ensures that the second lens will not protrude from the base surface or be recessed by a deep distance, and the thickness of the spectacle lens can be kept in a relatively stable range. For the second lens protruding from the base surface, the lens will not have a large thickness due to the existence of the second lens, so it can be thin and light.
  • the film is a high-hardness material used to improve the wear resistance of the spectacle lens, and its hardness is greater than that of the base material of the spectacle lens.
  • At least 80% of the second lenses have the same surface shape and refractive power, so that the wavefronts generated by this part of the second lenses have the same phase advance or phase lag relative to the wavefronts generated by the first lenses. Therefore, these second lenses can make the phase-modulated wavefront form a diffuse spot with a certain size and uniform energy distribution on the retina instead of a clear point image.
  • the surface shape of the second lens is selected from any one of equilateral triangle, square, and regular hexagon.
  • the central optical zone basically has a circular shape, and the radius r of the circle is in the range of 3 mm to 10 mm.
  • the surfaces of the first lens and the second lens are the same regular hexagon
  • the control subunit includes a first lens in the middle and 6*N second lenses surrounding the first lens , wherein, the N is an integer selected from 1-5.
  • the N is 1, and in the control sub-units at non-edge positions of the control area, each of the first lenses is in surface contact with six second lenses.
  • a plurality of the control subunits share at least a part of the second lens.
  • the diffuse spot diameter D r formed by the second lens on the retina satisfies:
  • ADD 22 is the additional refractive power of the second lens
  • D 22 is the diameter of the circumscribed circle of the second lens
  • P e+1 is the overall refractive power of the optical system composed of the spectacle lens and the eye after wearing glasses for correction, wherein, Dr is taken from 10 ⁇ m-100 ⁇ m.
  • Dr is taken from 10 ⁇ m-100 ⁇ m.
  • the additional refractive power of the microlenses can be set to a smaller value; on the contrary, if the number of microlenses is small, the additional refractive power of the microlenses can be set to a larger value.
  • the spectacle lens can enable the eyeball to obtain a visual effect that meets the blurring requirements of the image plane.
  • the diameter of the circumscribed circle of the regular polygon is in the range of 0.6mm-2.5mm.
  • the second lens set in this size range is smaller than the diameter of the pupil, which can ensure that the field of view corresponding to the pupil is subjected to phase modulation by multiple second lenses, thus ensuring that the image plane blur effect can be formed.
  • the outer edge of the control area is basically a regular polygon or a circle.
  • the spectacle lens is composed of an optical zone, a control zone and an optical zone.
  • each of the first lenses in the control area is configured such that the eyes can discern images after passing through the part of the first lenses.
  • the first lens in this form has the function equivalent to the optical zone, which ensures that when the eye turns to correspond to the control zone, the control zone can provide a clear image as the basis, and at the same time, the optical zone near the control zone Provides a clear image of the additional surroundings.
  • the user can basically clearly recognize the object image.
  • each of the control subunits is configured such that the first lenses are arranged at equal intervals in the circumferential direction of the spectacle lens and in a radial direction perpendicular to the circumferential direction.
  • the optical zone and the control zone are integrally formed.
  • the relative position between the optical zone and the control zone is precisely controlled during processing.
  • control area is formed on the object-side surface of the spectacle lens away from the eyeball, or the eyeball-side surface of the spectacle lens close to the eyeball.
  • the present disclosure actually also relates to a kind of frame glasses, which includes any one of the spectacle lenses mentioned above.
  • the spectacle lens designed in the present disclosure and the frame glasses with the spectacle lens can ensure that the glasses can obtain a clear field of vision when they are rotated to various angles, and at the same time, they can ensure blurred vision in the periphery and avoid stimulation to the eyeballs. Since the second lenses used to provide the blurred image plane are arranged in a form of adhering to each other, it is more beneficial to provide the blurred image plane.
  • Fig. 1 is a schematic structural view of the front of an ophthalmic lens according to a preferred embodiment of the present disclosure.
  • Fig. 2 is a structural schematic diagram of a cross-section of an ophthalmic lens according to a preferred embodiment of the present disclosure.
  • Fig. 3 is a structural schematic diagram of the control area of the spectacle lens in Figs. 1 and 2 .
  • Fig. 4 is a schematic front view and a schematic cross-sectional view of a second lens of an ophthalmic lens.
  • Spectacle lenses 1.
  • Control subunit U.
  • the spectacle lens 1 is a spectacle lens 1 suitable for being worn in front of human eyes.
  • the spectacle lens 1 is not attached to the eyeball surface, but is erected in front of the eyes by such as a metal frame or a plastic material frame.
  • Fig. 1 shows the front view of the spectacle lens 1, which corresponds to the viewing angle directly in front of the center of the spectacle lens 1;
  • Fig. 2 shows a cross-sectional view of the spectacle lens 1, which corresponds to the section along the A-A direction in Fig. 1 view.
  • the spectacle lens 1 has a substantially circular face shape, alternatively, the spectacle lens 1 may also have a rectangular, square or other irregular face shape.
  • the "surface shape” in the present disclosure refers to the shape defined by the outer edge of the object as a whole or a local area of the object when viewed along the normal direction of the object or the local center of the object.
  • an ophthalmic lens 1 comprising an optical zone 10, a control zone 20, and the like.
  • the optical zones in Fig. 1 are shown in the form of colored blocks.
  • Optic zone 10 is capable of providing a corrective effect on the vision of patients with refractive errors.
  • the optical zone 10 of the ophthalmic lens 1 is optionally made of a material having a refractive index of 1.5 to 1.76 and suitable for use as an ophthalmic lens.
  • the control area 20 is used to form a uniform diffusion spot, so that the wearer of the spectacle lens 1 can form a blurred peripheral vision image, and prevent the eyeball from being stimulated by the outside world.
  • the optical zone 10 forms the base surface S of the spectacle lens 1 and has a refractive power based on the prescription of the eyeball.
  • the optic zone 10 comprises a central optic zone 11 located in the central region of the ophthalmic lens 1 .
  • the surface of the optical zone 10 used for vision correction is smooth and continuous.
  • the base surface S can be a rotationally symmetric spherical or aspherical form, or a non-rotationally symmetric cylinder or spherical cylinder.
  • a non-rotationally symmetrical cylindrical or sphero-cylindrical surface can have different curvatures in the four quadrants.
  • the central optical zone 11 in the optical zone 10 basically has a circular shape, and the radius R of the circle is set at any value within the range of 3mm to 10mm, for example, 4mm, 5mm, 6mm and so on.
  • the spectacle lens 1 there is a distance between the outer edge of the control zone 20 and the outer edge of the ophthalmic lens 1 .
  • the area between the outer edge of the control zone 20 and the outer edge of the spectacle lens 1 is also the optical zone 10 (i.e., the peripheral optical zone 12), thus, in the direction of the spectacle lens 1 from the center to the outer edge, the spectacle lens 1 consists of optical zone 10 (central optical zone 11), control zone 20, and optical zone 10 (peripheral optical zone 12) in sequence.
  • the spectacle lens 1 is in fact provided with any mechanism or structure such as a groove, a through hole, a protrusion, etc. for fixing it near its outer edge and/or outer edge,
  • Mechanism or structures are used to fix spectacle frames, etc., and do not belong to the innovations of the present disclosure, and the disclosure of these contents does not affect the implementability of the disclosed solutions.
  • this article does not go into details.
  • the outer edge of the control zone 20 defines a substantially regular hexagonal shape.
  • the outer edge of the control area 20 can also be substantially square, rectangular, circular or the like.
  • the total area covered by the control zone 20 on the surface of the ophthalmic lens 1 can determine the shape defined by the outer edge of the control zone 20 .
  • the outer edge of the control zone 20 can define more formal shapes; in the embodiment with the control zone 20 with a smaller coverage area, the control
  • the outer edge of the zone 20 is preferably set in a circle or a shape with a large number of sides (such as a hexagon as shown in FIG. 1 ).
  • substantially a regular polygon means that on a macroscopic level, the outer edge of a certain region or part that can be discerned by a skilled person is a regular polygon.
  • its edge does not necessarily have to be a straight line segment or perimeter, and the edge or perimeter may actually be a straight line segment, a wavy line segment, or other forms of polylines, etc.
  • the region or part belongs to the meaning of "substantially a regular polygon".
  • the outer edge of the control area 20 is substantially a regular hexagon” in FIG.
  • the surface shape of the control zone 20 defined by the outer edge of the is "regular hexagon". Based on this, those skilled in the art can clearly understand the specific meaning intended to be expressed by "substantially” in the present disclosure.
  • the control zone 20 is arranged around the central optical zone 11 of the spectacle lens 1 , and is in the form of a ring structure.
  • the control area 20 includes a plurality of control subunits U attached to each other as shown in FIG. 3 .
  • each control subunit U located in the non-edge position of the control area 20 it has a first lens 21 located in the center (for ease of distinction, the first lens 21 in FIG.
  • the form shown, in fact, the spectacle lens as a whole is transparent or translucent state) and six second lenses 22 surrounding the first lens 21.
  • the first lens 21 and the second lens 22 have the same regular hexagonal surface shape.
  • the first lens 21 and the second lens 22 have different refractive powers.
  • the second lenses 22 in each control subunit U are in surface contact with each other through the surfaces where the sides of the regular hexagon are located.
  • these control subunits U are configured such that the wavefronts formed by them can be superimposed on the working focal plane of the optical zone 10 to form uniform diffuse spots, which can form blurred peripheral vision images.
  • the blurred peripheral visual image mentioned here is relative to the visual image of the central optical zone.
  • the modulation transfer function of the peripheral imaging field of view drops below 20% at a spatial frequency of 10cyc/deg, which is far lower than that of the central optical zone. Modulation transfer function values for the optical zones (MTF values for the central optical zone typically exceed 70%).
  • a plurality of control sub-units U that are "attached to each other” means that the control sub-units U are attached to each other in the circumferential direction and radial direction of the ophthalmic lens 1, or are evenly spaced between the circumferential direction and the radial direction. fit relationship.
  • the wavefront when the imaging wavefront passes through the control area 20, the wavefront will be space-divided according to the distribution of each second lens 22, and the formed sub-wavefronts will be correspondingly phase delayed by the additional refractive power of the second lens 22 (or advance), all the wavelets are finally superimposed on the working focal plane corresponding to the base surface S in the same area on the retina, these wavelets will not form a confocal point, thus reducing the imaging quality on the retina and avoiding the A second image plane occurs at a spatial location outside the retina.
  • control subunits U in the control area 20 are arranged in the form of bonding to each other, and the second lenses 22 in the control subunits U are arranged in the form of bonding to each other, and are used for adjusting
  • the control area 20 used therefor has a larger filling rate.
  • the control area 20 can therefore deeply modulate the imaging quality of the image plane on the retina, ensuring that the peripheral blurred image can be formed in any direction when the eye rotates, which advantageously avoids the blurred image formation in the prior art.
  • the second lenses 22 (control sub-units U) attached to each other can cooperate to avoid double images.
  • each first lens 21 in the control area 20 is configured so that the eyes can distinguish images after passing through this part of the first lens 21, and the first lens 21 has an equivalent function in the optical zone 10.
  • the second lens 22 and the optical zone 10 at other positions can ensure that the wearer obtains a clear image.
  • the user can basically clearly recognize the object image.
  • the wearer looks forward normally or turns to a position close to the eyelids, the pupils are all facing the optical zone 10, and the wearer can naturally obtain a clear image.
  • the second lens 22 of the control area 20 can form an additional peripheral blurred object image.
  • Each second lens 22 can optionally be set as a spherical lens or an aspheric lens under the premise of providing a peripheral blurred object image.
  • the refractive power of the second lens 22 between different control subunits U can be set to be the same or different, and the phase modulation effect produced by each corresponding control subunit U on each sub-wavefront can be a mutually consistent phase retardation (phase advance amount ), or a non-uniform phase delay (phase lead).
  • the second lens 22 is a regular lens, and the normal direction of the second lens 22 at its center is generally the same as the normal direction of the base surface S at that position.
  • the wavelets of the second projection lens will not be confocal with each other, the central rays of the wavelets corresponding to the second lens 22 of this form will all face the same image point position formed by the basic curved surface on the retina, ensuring that the wavelets When the wave front propagates to the retina, it will form a stack at the image point, which will spread the ideal image point into a diffuse spot, so that the image quality will be significantly reduced. This achieves the best blurred imaging results.
  • sub-figure (a) corresponds to the front direction of the spectacle lens 1 of Fig. 1
  • sub-figure (b) corresponds to the cross-sectional direction of the spectacle lens 1 of Fig. 2
  • the view directions of sub-graph (a) and sub-graph (b) are perpendicular to each other.
  • the six vertices of the second lens 22 on the spectacle lens 1 are set on the base surface S (ie, the arc dashed line in FIG. 4 ).
  • the base surface S where the second lens 22 is located is a virtual surface (the virtual surface is occupied by the surface of the second lens 22), and the virtual surface corresponds to the ophthalmic lens 1 set there according to the prescription.
  • the lens is formed in a form in which the middle protrudes from the surface of the ophthalmic lens 1 . It can be understood that when the spectacle lens 1 is being processed, the pattern of the basic surface S of the lens will be automatically produced in the processing equipment program. The apex position of the second lens 22 is set according to the reference point, and the pattern of the second lens 22 is further processed on this basis.
  • the second lens 22 is a convex lens arranged on the object side surface of the spectacle lens 1 away from the eyeball, and there is a distance between the six edges of the top surface of the second lens 22 and the base surface S .
  • the edges of the top surface of the second lens 22 can also be recessed from the base surface S instead.
  • the second lens 22 is in the form of a concave lens.
  • disposing the apex of the second lens 22 on the base surface S ensures that the second lens 22 will not protrude or be recessed by a deep distance from the base surface S, and the thickness of the spectacle lens 1 can be kept in a relatively stable range.
  • the lens does not have a large thickness due to the existence of the second lens 22, so it can be thin and light.
  • the second lens 22 recessed by the base surface S the second lens 22 having a smaller recess depth will not cause the ophthalmic lens 1 to have weaker anti-bending and anti-torsion properties at the position corresponding to the second lens 22 .
  • setting the apex of the second lens 22 on the base surface S can ensure a stable reference base in the lens processing process, and reduce the complexity of lens processing.
  • the first lens 21 is in surface contact with all the second lenses 22 in the control subunit U, and each second lens 22 serves as a common part of two adjacent control subunits U.
  • the second lens 22 can be processed first.
  • it is only necessary to process the surface of the first lens 21 to a corresponding shape that can form the required refractive power.
  • the processing personnel only need to process the second lens 22 . Obviously, this is beneficial to improve the processing speed and processing quality.
  • the control subunit U includes a first lens 21 in the middle and 6*N second lenses 22 surrounding the first lens 21, wherein , N is an integer from 1-5. It can be understood that FIG. 3 corresponds to the form of the control subunit U in which N is 1. When N is set to 2, there are 12 second lenses 22 surrounding the first lens 21 , that is, there are two layers of second lenses 22 outside the first lens 21 .
  • the second lens 22 can be set as the common second lens 22 of adjacent control subunits U.
  • the second lens 22 of the present disclosure at least 80% of the second lenses 22 are set to have the same surface shape and refractive power, and these designs make the wavefront produced by the second lens 22 have A consistent phase lag or phase advance phenomenon, which makes the phase-modulated wavefront (the wavefront generated by the second lens 22) form a uniform optical effect of a diffuse spot with a certain size and uniform energy distribution on the retina, rather than clear point like.
  • all the second lenses 22 are set to have the same surface shape and refractive power, which is conducive to forming a better uniform optical effect.
  • the surface shape of the second lens 22 can also be Set to an equilateral triangle, square, etc.
  • These types of second lenses 22 all have the ability to ensure that the spherical or arc-shaped base surface S1 of the spectacle lens 1 forms a control zone 20 in a form of surface contact with each other, and the control zone 20 forms the first circumferential and radial uniform distribution.
  • the lens 21 is convenient to improve the clarity of the object image sensed by the glasses when the glasses are facing the control area 20 .
  • the space (first lens) separated by the second lens 22 of the control subunit U forms a regular shape with substantially equal distances from the edge to the center, which is especially beneficial for the scene where the eyes see objects through the control area.
  • the second lens 22 with a regular hexagonal surface is the second lens 22 of the optimal form, which ensures that the first lens 21 (0 additional diopter or less diopter) surrounded by the second lens 22 has The form is infinitely close to a circle, which can ensure to a large extent that the first lens 21 of all the control areas 20 form a clear object image at the macula.
  • the diameter of the circumscribed circle of the regular hexagon is set within the range of 0.6mm-2.5mm.
  • the second lens 22 arranged in this size range to be smaller than the diameter of the pupil, it can ensure that the field of view corresponding to the pupil is subjected to phase modulation by multiple second lenses 22 , thus ensuring that the image plane blur effect can be formed.
  • the diameter Dr of the diffuse spot formed by the second lenses 22 on the retina satisfies:
  • ADD22 is the additional refractive power of the second lens
  • D22 is the diameter of the circumscribed circle of the second lens
  • Pe+1 is the overall refractive power of the optical system composed of the spectacle lens and the eye after wearing the glasses corrected, wherein, Dr is taken from 10 ⁇ m-100 ⁇ m.
  • Dr is taken from 10 ⁇ m-100 ⁇ m.
  • the additional refractive power of the second lens 22 can be set to a smaller value; otherwise, if the number of the second lens 22 is small, the additional refractive power of the second lens 22 can be is set to a larger value.
  • the spectacle lens 1 can enable the eyeball to obtain a visual effect satisfying the blurring degree of the image plane.
  • each control subunit U is configured such that the first lenses 21 are arranged at equal intervals in the circumferential direction of the spectacle lens 1 and in a radial direction perpendicular to the circumferential direction.
  • this is also to ensure that the first lens 21 can cooperate with other optical zones 10 to ensure that the wearer can obtain sufficient vision to distinguish objects when the glasses rotate to the control zone 20 .
  • the radial is only a vertical direction relative to the circumferential direction, which is expressed as the direction extending from the middle of the spectacle lens 1 to the outer edge,
  • the underlying meaning of "the spectacle lens 1 has a circular shape” is not necessarily implied.
  • the ophthalmic lens 1 of the present disclosure may have other non-circular surface shapes such as rectangle.
  • the optical zone 10 and the control zone 20 are integrally formed.
  • the relative position between the optical zone 10 and the control zone 20 is precisely controlled during processing.
  • the ophthalmic lens 1 formed by pasting it is actually difficult to accurately control the relative positions of the control zone 20 and the optical zone 10 .
  • the integral formation of the optical zone 10 and the control zone 20 is not necessary.
  • control area 20 shown in the embodiment shown in FIGS. The eyeball-side surface of the eyeball; or, the control area 20 is simultaneously formed on the object-side surface and the eyeball-side surface of the spectacle lens 1 .

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Abstract

一种眼镜片（1），包括光学区（10）和控制区（20）。光学区（10）能够为屈光不正患者的视力提供校正作用。光学区（10）形成眼镜片（1）的基础表面（S）且具有基于眼球的处方的屈光力。控制区（20）环绕在眼镜片（1）的中央光学区（11），其包括多个彼此贴合的控制子单元（U）。每个控制子单元（U）具有位于中央位置的第一透镜（21）和周围的多个第二透镜（22）。各个第二透镜（22）具有呈正多边形的面型，多个控制子单元（U）中的至少一部分的各个第二透镜（22）之间通过正多边形的边所在的面进行面接触，并且多个控制子单元（U）被配置成使其形成的波面能够叠加在光学区（10）的工作焦面上而形成均匀的弥散斑，弥散斑能够形成模糊的周边视觉图像。这种眼镜片（1）能够对视网膜上的像面成像质量作深度调制。

Description

一种眼镜片及框架眼镜 技术领域
本公开涉及眼科设备领域，尤其涉及一种眼镜片，其旨在佩戴在人眼前方，以抑制眼镜的诸如近视或远视等异常的发展。
背景技术
传统镜片主要寻求对已经具有屈光不正的眼睛进行视力校正。这类镜片是作为救济的形式来解决眼睛所存在的缺陷。人们佩戴这类镜片(例如单光镜片)后，视力不可避免地会进一步恶化(例如近视进一步加深)。人们更希望能够对屈光不正(例如近视、远视等)进行主动控制，以防止视力的进一步恶化。因此，眼镜片正在传统的单光镜片基础上发展出新的具有近视缓控作用的功能型镜片。
早期近视缓控功能型镜片的代表是周边连续离焦型镜片，其镜片周边的球镜屈光力要高于镜片中央区，例如球镜屈光力沿各个径向方向逐渐递增的回转对称型环带离焦镜片、球镜屈光力沿四个相互正交的方向以不同的递增方式逐渐变化的非回转对称型离焦镜片，以及球镜屈光力从镜片上部到下部纵向递增的渐变多焦镜片等。在这类镜片中，面型曲率的连续改变是球镜屈光力递增的主因。然而，根据微分几何的基本原理，镜片的面型曲率连续变化一定伴随着表面主曲率差异的出现，主曲率的差异会主要表现出曲面的像散分布，因此，球镜屈光力递增的同时也导致像散像差的同步出现，进而导致镜片成像质量降低。
对于周边连续离焦型镜片，用户在佩戴该类镜片时，眼睛视线如果从周边球镜屈光力递增的离焦区视物，视觉效果相比于使用镜片中央光学区要模糊很多。而当眼睛视线从中央光学区视物时，周 边视野因为经过周边离焦区，同样会有周边视觉模糊的效果，这种周边视野模糊机制被认为与近视进展控制作用之间存在紧密关联。但是，周边连续离焦型镜片的明显缺陷是球镜屈光力的变化分布必然引起视觉放大率的连续改变，因此全视野内会出现视物扭曲和畸变，给佩戴者带来不适效果。
新一类的近视缓控功能型镜片主要采用周边离散型多点离焦设计，其镜片周边按照一定规律分散布置了一系列微透镜，利用微透镜的正加光度形成第二屈光区，例如中国专利CN104678572A眼镜片所公开的。镜片在成像工作时，没有微透镜分布的第一屈光区具有将像聚焦在眼睛视网膜上的常规功能，与此同时，第二屈光区具有将像聚焦在眼睛视网膜前方的功能，由此来抑制近视的发展。为了能同时在视网膜上和视网膜前成像，微透镜必须相互间隔一定的距离，留出的间隔区域作为第一屈光区进行工作，因此微透镜在微结构区域内的面积填充率通常不能超过60％，才能使镜片发挥效用。正是因为微透镜的填充率受限问题，周边离散型多点离焦镜片无法对视网膜上的像面成像质量作深度调制。同时，在使用该周边离散型镜片的情况下，视网膜以及视网膜之前分别存在图像(二重像)，容易引起眼睛调节紊乱问题。
因此，亟待一种能够为屈光不正的患者带来清晰视野，同时抑制视力进一步发展的眼镜片。
发明内容
针对根据现有技术的眼镜片的上述现状，本公开的目的之一在于提供一种能够抑制眼睛的屈光不正的发展，同时确保充分的可视性和良好佩戴感的眼镜片。
该目的通过公开以下形式的眼镜片来实现。该眼镜片包括光学区和控制区。光学区能够为屈光不正患者的视力提供校正作用。所述光学区形成所述眼镜片的基础表面且具有基于眼球的处方的屈光力，所述光学区包括位于所述眼镜片的中央区域的中央光学区。控 制区环绕在所述中央光学区，其包括多个彼此贴合的控制子单元。每个控制子单元具有位于中央位置的第一透镜和环绕所述第一透镜的多个第二透镜。所述第一透镜和所述第二透镜具有不同的屈光力。各个第二透镜具有呈正多边形的面型，多个控制子单元中的至少一部分的各个所述第二透镜之间通过所述正多边形的边所在的面进行面接触，并且多个所述控制子单元被配置成使其形成的波面能够叠加在所述光学区的工作焦面上而形成均匀的弥散斑，所述弥散斑能够形成模糊的周边视觉图像。
当眼睛朝前观看或者透过其他设有光学区的镜片区域视物时，基于眼球处方而设计的光学区能够保证眼睛获得清晰的视觉效果。同时，穿过控制区的第二透镜能够在视网膜的前和/或后形成模糊的周边图像，从而避免了对眼球刺激，保证了眼睛的眼轴不再变化，视力不再恶化。由于控制区内的各个控制子单元是以彼此贴合的形式进行布置的，并且各个控制子单元内的各个第二透镜是以彼此贴合的形式布置，用作调节之用的控制区能够具有较大的填充率，因此，控制区能够对视网膜上的像面成像质量作深度调制，形成模糊图像，避免二重像的情况出现。
优选地，所述第一透镜的屈光力P1与对应区域的光学区的屈光力P0满足以下关系：P1＝P0+ADD，其中，ADD为第一透镜的附加屈光力，其取自0-0.3D中的任意值。由于处于控制子单元外周的第二透镜具有正多边形的面型，且各个控制子单元之间是通过第二透镜而贴合的，因此，由第二透镜包绕的第一透镜是以正多边形面型形式存在，并且在眼镜片上在周向上能以规则形式布置。当将控制单元的各个第一透镜的屈光力设置成基本上等同于对应位置的光学区的屈光力，第一透镜此时具有等价于光学区的功能。当佩戴者朝任何方向视物均能形成清晰的图像。
优选地，多个所述控制子单元中的所述至少一部分的所述第一透镜与该控制子单元中的所有第二透镜面接触。对于这类眼镜片，可优先加工第二透镜，在加工至设置第一透镜的位置时，只需要对 第一透镜的表面进行加工至能够形成所需屈光力的对应形状即可，而无需对第一透镜朝向各个第二透镜的表面进行加工。甚至，在第一透镜的附加屈光力为0时，加工人员只需对第二透镜进行加工即可。显然地，这有利于提高加工速度和加工质量。
优选地，所述第二透镜为规则透镜，并且所述第二透镜在其中心处的法线方向与该位置的基础表面的法线方向总体相同。尽管第二投镜的子波面不会相互共焦点，但是该形式的第二透镜所对应的子波面的中心光线将全都朝向由基础曲面在视网膜上形成的同一个像点位置，确保了子波面在传播到视网膜时会在该像点处形成堆叠，将理想像点扩散为弥散斑，从而让成像质量出现明显下降。这实现了最佳的模糊成像效果。
优选地，所述第二透镜的顶点形成于基础表面上。更优选地，所述第二透镜为设置在所述眼镜片的远离眼球的物体侧表面的凸透镜或凹透镜，并且第二透镜的顶面的六条棱边与基础表面之间存在距离。一方面，将第二透镜的顶点设置在基础表面上确保了第二透镜不会由基础表面突出或凹陷较深的距离，眼镜片的厚度得以处于较为稳定的范围内。对于由基础表面突出的第二透镜，镜片不会由于第二透镜的存在而具有较大的厚度，因此可以形成轻薄的特点。对于由基础表面凹陷的第二透镜，较小凹陷深度的第二透镜不会导致眼镜片在对应于第二透镜的位置具有较弱的抗弯曲、抗扭曲性能。另一方面，将第二透镜的顶点设定在基础表面上，可以保证镜片加工过程可以具有稳定的参照基础，镜片的加工复杂度得以降低。除此之外，第二透镜的顶面的六条棱边与基础表面之间存在距离，这可以保证在后续的镜片加硬镀膜加工过程中第二透镜将具有良好的复形再现效果，避免了膜层的平滑作用可能对第二透镜附加屈光力的稳定性产生干扰。可以理解，该处的膜是用作提高眼镜片的耐磨性的高硬度材质，其硬度大于眼镜片的基础材料的硬度。
优选地，至少80％的第二透镜具有相同的面型和屈光力，以使该部分第二透镜产生的波面相对于所述第一透镜所产生的波面具有 相同的相位超前或相位滞后。由此，这些第二透镜能够让相位调制后的波面在视网膜上形成具有一定尺寸且能量分布均匀的弥散斑，而非清晰的点像。
优选地，所述第二透镜的面型选自等边三角形、正方形、正六边形中的任意一种。
优选地，所述中央光学区基本上具有圆形的面型，所述圆形的半径r在3mm至10mm的范围内。
优选地，所述第一透镜和第二透镜的面型为相同的正六边形，所述控制子单元包括位于中间的一个第一透镜和环绕所述第一透镜的6*N个第二透镜，其中，所述N为取自1-5的整数。
优选地，所述N为1，并且在所述控制区的非边缘位置的控制子单元，每个所述第一透镜分别与6个第二透镜面接触。
优选地，多个所述控制子单元至少共用一部分所述第二透镜。
优选地，在对应于瞳孔的视野范围内，所述第二透镜在视网膜所形成的的弥散斑直径D r满足：
Figure PCTCN2022072734-appb-000001
其中，ADD 22为所述第二透镜的附加屈光力，D 22为第二透镜的外接圆的直径，P e+l为戴镜矫正后的眼镜片和眼睛组成的光学系统的整体屈光力，其中，Dr取自10μm-100μm。在瞳孔直径范围内，如若微透镜数量较多，微透镜的附加屈光力可以被设定为较小值；反之，如果微透镜数量较小，微透镜的附加屈光力可以被设定为较大值。对于这两种形式，眼镜片均可使得眼球获得满足像面模糊度要求的视觉效果。
优选地，所述正多边形的外接圆的直径在0.6mm-2.5mm的范围内。设置在该尺寸范围的第二透镜小于瞳孔的直径，其可以确保瞳孔对应的视野受多个第二透镜的相位调制作用，因此可以确保能够形成像面模糊效果。
优选地，所述控制区的外缘和眼镜片的外缘之间存在距离，并且，在眼镜片中心的法线方向，所述控制区的外缘基本上呈正多边 形或圆形。在眼镜片从中心到外缘的方向上，眼镜片由光学区、控制区、光学区组成。
优选地，所述控制区的各个所述第一透镜被配置成使得眼睛经由该部分第一透镜后可辨别图像。事实上，该形式的第一透镜具有等价于光学区的功能，其确保了眼睛转动至对应于控制区的时候，控制区能够提供作为基础的清晰像，同时，在控制区附近的光学区提供附加的周边的清晰像。虽然在该状态下，由于控制区的第二透镜提供的模糊像面作用，但是用户基本可以清楚识别物象。
优选地，各个所述控制子单元被配置成使得所述第一透镜在所述眼镜片的周向以及和周向垂直的径向上等间距布置。
优选地，所述光学区和所述控制区一体成形。对于一体成形的眼镜片而言，光学区和控制区之间的相对位置在加工过程中即被精准控制。对于粘贴形成的眼镜片，控制区和光学区事实上难以确保精准控制光学区和控制区的相对位置。
优选地，所述控制区形成于所述眼镜片的远离眼球的物体侧表面，或者眼镜片的靠近眼球的眼球侧表面。
除此之外，本公开事实上还涉及一种框架眼镜，该框架眼镜包括如上所述的任意一项眼镜片。
在符合本领域常识的基础上，上述各优选实施方式，可任意组合，即得本公开各较佳实例。
本公开设计的眼镜片以及具有该眼镜片的框架眼镜可以保证眼镜在转动至各个角度时均能获得清晰视野，同时，其确保了在周边形成模糊的视觉，避免了对眼球的刺激。由于用作提供模糊像面的第二透镜是以彼此贴合的形式进行布置的，更有利于提供模糊像面。
附图说明
为了更好地理解本公开的上述及其他目的、特征、优点和功能，可以参考附图中所示的优选实施方式。附图中相同的附图标记指代相同的部件。本领域技术人员应该理解，附图旨在示意性地阐明本 公开的优选实施方式，对本公开的范围没有任何限制作用，图中各个部件并非按比例绘制。
图1是根据本公开的优选实施方式的眼镜片的正面的结构示意图。
图2是根据本公开的优选实施方式的眼镜片的横截面的结构示意图。
图3是图1、2的眼镜片的控制区的结构示意图。
图4是眼镜片的第二透镜的正面示意图和截面示意图。
其中：
眼镜片：1。
光学区：10。
中央光学区：11。
外缘光学区：12。
控制区：20。
控制子单元：U。
第一透镜：21。
第二透镜：22。
基础表面：S。
具体实施方式
接下来将参照附图详细描述本公开的公开构思。这里所描述的仅仅是根据本公开的优选实施方式，本领域技术人员可以在所述优选实施方式的基础上想到能够实现本公开的其他方式，所述其他方式同样落入本公开的范围。在以下的具体描述中，例如“上”、“下”、“内”、“外”、“纵”、“横”等方向性的术语，参考附图中描述的方向使用。本公开的实施例的部件可被置于多种不同的方向，方向性的术语是用于示例的目的而非限制性的。
本公开中，眼镜片1是一种适用于佩戴在人眼前方的眼镜片1。眼镜片1不贴附在眼球表面，而是通过诸如金属框架或塑性材料框 架架设于眼睛前方。
图1示出了眼镜片1的正面视图，其对应于眼镜片1中心的正前方的视角；图2示出了眼镜片1的横截面视图，该视图对应于图1中的A-A向的截面视图。
参见图1，在该实施例中，眼镜片1具有基本呈圆形面型的样式，可替换地，眼镜片1还可以是具有矩形、正方形或其他异形形状的面型。
如无特别说明，在本公开中的“面型”是指沿着物件或物件的局部中心的法线方向观察，该物件总体或物件的局部区域的外缘限定的形状。
参见图1-2，其示出了眼镜片1，该眼镜片1包括光学区10和控制区20等。其中，为了便于区别，图1中的光学区以着色图块的形式示出。光学区10能够为屈光不正患者的视力提供校正作用。眼镜片1的光学区10可选地由折射率为1.5至1.76且适于用作眼镜片的材料制成。控制区20用于形成均匀的弥散斑，使得眼镜片1佩戴者形成模糊的周边视觉图像，避免眼球受到外界刺激。
光学区10形成眼镜片1的基础表面S且具有基于眼球的处方的屈光力。光学区10包括位于眼镜片1的中央区域的中央光学区11。对于用作校正视力之用的光学区10，其表面光滑连续。基础表面S可以是回转对称的球面形式或非球面形式，也可以是非回转对称的柱面或者球柱面。非回转对称的柱面或球柱面可以在四个象限上具有不同的曲率。
光学区10中的中央光学区11基本上具有圆形的面型，圆形的半径R被设定在3mm至10mm的范围内的任意值，例如，4mm、5mm、6mm等等。
在图1、2的实施例中，控制区20的外缘和眼镜片1的外缘之间存在距离。具体地，控制区20的外缘和眼镜片1的外缘之间的区域也是光学区10(即边缘光学区12)，由此，在眼镜片1从中心到外缘的方向上，眼镜片1依次设有光学区10(中央光学区11)、控 制区20、光学区10(边缘光学区12)组成。
需要说明的是，尽管未示出，眼镜片1事实上在接近其外缘和/或外缘处还设有用于对其进行固定的凹槽、通孔、突起等任意形式的机构或结构，这些机构或结构用作固定眼镜框架等，并不属于本公开的创新之处，这些内容的公开与否不影响本公开方案的可实施性。在此，本文未予赘述。
继续参见图1，在眼镜片1中心的法线方向，控制区20的外缘限定出基本上呈正六边形的形状。此外，控制区20的外缘还可以是基本上呈正方形、矩形、圆形等。控制区20在眼镜片1表面的覆盖区域的总面积可决定控制区20的外缘所限定的形状。总体而言，在设有较大覆盖面积的控制区20的实施例中，控制区20外缘可以限定更多形式的形状；在设有较小覆盖面积的控制区20的实施例中，控制区20外缘优选地被设定成圆形或边长数量较多的形状(例如图1所示的六边形)。
在本公开中，“基本上呈正多边形”表示，在宏观层面上，技术人员所能辨别到的某区域或部件的外缘是正多边形的含义。对于基本上呈正多边形的区域或部件，其边缘事实上并不必然地是直线形式的线段或围边，边缘或围边实际可以是直线线段、波浪线线段或其他形式的折线形式等等。在技术人员能够辨别到区域或部件的外缘所限定的形状的基础上，该区域或部件均属于“基本上呈正多边形”的含义。例如，在图1的“控制区20的外缘基本上呈正六边形”的示例中，控制区20的外缘事实上为波浪线形式的边长，但技术人员能够辨别出该控制区20的外缘限定的控制区20的面型呈“正六边形”。基于此，本领域技术人员能够清楚理解本公开“基本上”所要表达的具体含义。
控制区20环绕设置在眼镜片1的中央光学区11，其呈环形结构。控制区20含有如图3所示的多个彼此贴合的控制子单元U。在该实施例中，对于位于控制区20的非边缘位置的每个控制子单元U，其具有位于中央位置的第一透镜21(为了便于区别，图3中的第一透 镜21以黑色图块的形式示出，事实上，眼镜片整体为透明或半透明状态)和环绕第一透镜21的6个第二透镜22。第一透镜21和第二透镜22具有相同的正六边形的面型。第一透镜21和第二透镜22具有不同的屈光力。各个控制子单元U中的各个第二透镜22之间通过正六边形的边所在的面进行面接触。结合图1、2，这些控制子单元U被配置成使其形成的波面能够叠加在光学区10的工作焦面上而形成均匀的弥散斑，弥散斑能够形成模糊的周边视觉图像。这里说的模糊的周边视觉图像是相对中央光学区的视觉图像而言的，作为优选方案，即周边成像视场的调制传递函数在空间频率10cyc/deg处下降到20％以下，远低于中央光学区的调制传递函数值(中央光学区的调制传递函数值通常超过70％)。
在此，多个“彼此贴合”的控制子单元U是指，控制子单元U之间在眼镜片1的周向、径向彼此面贴合或周向和径向二者之间均面贴合的关系。
经过上述设计的眼镜片1，成像波面在经过控制区20时，波面将按照各个第二透镜22的分布进行空间分割，形成的子波面将由第二透镜22的附加屈光力产生相应的相位延迟(或超前)，所有的子波面最终在视网膜上的同一区域内叠加至与基础表面S相对应的工作焦面上，这些子波面不会形成共焦点，从而使视网膜上的成像质量降低，并避免了在视网膜之外的空间位置出现第二个像面的情况发生。
如上所述，由于控制区20内的各个控制子单元U是以彼此贴合的形式进行布置的，并且各个控制子单元U内各个第二透镜22是以彼此贴合的形式布置，用作调节之用的控制区20因此具有较大的填充率。在此情况下，控制区20因此能够对视网膜上的像面成像质量作深度调制，确保眼睛转动至任何方向上均能形成周边模糊图像，有利避免了现有技术中，用作形成模糊图像的控制单元之间形成的不规则区域仍存在对眼球产生刺激的风险。彼此贴合的第二透镜22(控制子单元U)能够协同作用，避免二重像的情况出现。
对于本公开的控制子单元U中的第一透镜21，其屈光力P1与对应区域的光学区10的屈光力P0被设定成满足：P1＝P0+ADD，其中，ADD为附加屈光力，其取自0-0.3D中的任意值。优选地，附加屈光力ADD被设定成0，此时，控制区20的各个第一透镜21被配置成使得眼睛经由该部分第一透镜21后能够辨别图像，第一透镜21此时具有等价于光学区10的功能。当佩戴者转动眼睛，使得瞳孔转动到与正对控制区20时，第二透镜22以及其他位置的光学区10可确保佩戴者获得清晰的图像。虽然在该状态下，由于控制区20的第二透镜22提供的模糊像面作用，但是用户基本可以清楚识别物象。而在佩戴者正常前视或大幅度转动至接近眼睑的位置时，瞳孔均正对着光学区10，佩戴者自然也能获得清晰图像。综上，在以上任何情况下，控制区20的第二透镜22均能形成附加的周边模糊物象。
在满足提供周边模糊物象的前提下，各第二透镜22可选地设定成球面透镜或非球面透镜。不同的控制子单元U之间的第二透镜22的屈光力可设置成相同或不同，对应的各控制子单元U对各子波面产生的相位调制作用可以是相互一致的相位延迟量(相位超前量)，也可以是非一致的相位延迟量(相位超前量)。
第二透镜22为规则透镜，并且第二透镜22在其中心处的法线方向与该位置的基础表面S的法线方向总体上相同。尽管第二投镜的子波面不会相互共焦点，但是该形式的第二透镜22所对应的子波面的中心光线将全都朝向由基础曲面在视网膜上形成的同一个像点位置，确保了子波面在传播到视网膜时会在该像点处形成堆叠，将理想像点扩散为弥散斑，从而让成像质量出现明显下降。这实现了最佳的模糊成像效果。
参见图4中的子图(a)和(b)，其中，子图(a)对应于图1的眼镜片1的正面方向，子图(b)对应于图2的眼镜片1的截面方向，子图(a)和子图(b)的视图方向相互垂直。作为本公开的优选实施例，见图4的子图(b)，眼镜片1上的第二透镜22的6个顶点被设定在基础表面S(即图4的弧形虚线)上。需要说明的是， 该设有第二透镜22的位置的基础表面S为虚拟表面(虚拟表面为第二透镜22的表面所占据)，虚拟表面对应于眼镜片1按照处方需要在该处设定的具有特定屈光力的表面。在结合子图(a)，当6个顶点被设定在基础表面S上时，透镜形成为中间突出眼镜片1表面的形式。可以理解，在眼镜片1进行加工时，加工设备程序内会自动生产镜片的基础表面S的样式，在加工至设有第二透镜22的位置时，因此能以该位置处的基础表面S作为参考点来设定第二透镜22的顶点位置，并在此基础上进一步加工出第二透镜22的样式。在该过程中，并不需要首先在设有第二透镜22的位置先行加工基础表面S，而后再加工第二透镜。将眼镜片1的第二透镜22的顶点设定在基础表面S的这种设定方式可以保证第二透镜22的位置精度和第二透镜22的曲率、屈光力精度。
在图1-4的实施例中，第二透镜22为设置在眼镜片1的远离眼球的物体侧表面的凸透镜，并且第二透镜22的顶面的六条棱边与基础表面S之间存在距离。在另一实施例中，虽然未示出，应理解，第二透镜22的6个顶点位于基础表面S上的同时，第二透镜22的顶面的棱边还可替换由基础表面S下凹，此时第二透镜22为凹透镜的形式。
一方面，将第二透镜22的顶点设置在基础表面S上确保了第二透镜22不会由基础表面S突出或凹陷较深的距离，眼镜片1的厚度得以处于较为稳定的范围内。对于由基础表面S突出的第二透镜22，镜片不会由于第二透镜22的存在而具有较大的厚度，因此可以形成轻薄的特点。对于由基础表面S凹陷的第二透镜22，较小凹陷深度的第二透镜22不会导致眼镜片1在对应于第二透镜22的位置具有较弱的抗弯曲、抗扭曲性能。另一方面，将第二透镜22的顶点设定在基础表面S上，可以保证镜片加工过程可以具有稳定的参照基础，镜片的加工复杂度得以降低。
在图1-3的实施例中，第一透镜21与该控制子单元U中的所有第二透镜22面接触，并且各个第二透镜22作为两个相邻的控制子 单元U的共同部分。对于这类眼镜片1，可优先加工第二透镜22，在加工至设置第一透镜21的位置时，只需要对第一透镜21的表面进行加工至能够形成所需屈光力的对应形状即可，而无需对第一透镜21朝向各个第二透镜22的表面进行加工。甚至，在第一透镜21的附加屈光力为0时，加工人员只需对第二透镜22进行加工即可。显然地，这有利于提高加工速度和加工质量。
对于具有相同的正六边形面型的第一透镜21和第二透镜22，控制子单元U包括位于中间的一个第一透镜21和环绕第一透镜21的6*N个第二透镜22，其中，N为取自1-5的整数。可以理解，在图3对应于N为1的控制子单元U的形式。在N设定为2的时候，环绕第一透镜21的第二透镜22有12个，也即第一透镜21外有两层第二透镜22。
继续参见图3，对于多个控制子单元U而言，至少一部分的述第二透镜22可设为相邻的控制子单元U的共用第二透镜22。对于控制区20的主体区域内(即不包括控制区20内缘和外缘的区域内)，第一透镜21和第二透镜22的数量基本满足：N2＝N1*3的关系，其中N1是第一透镜21的数量，N2是第二透镜22的数量。
对于本公开的第二透镜22，至少80％的第二透镜22被设定成具有相同的面型和屈光力，这些设计使第二透镜22所产生的波面相对于第一透镜所产生的波面具有一致的相位滞后或者相位超前现象，这使得让相位调制后的波面(第二透镜22产生的波面)在视网膜上形成具有一定尺寸且能量分布均匀的弥散斑这种均一的光学效果，而非清晰的点像。事实上，优选地，所有的第二透镜22被设定成具有相同的面型和屈光力，这利于形成更佳均一的光学效果。
尽管以上说明以及附图1-4仅示出了作为正六边形面型的第一透镜21、第二透镜22，事实上，基于本公开的发明构思，第二透镜22的面型还可以被设定成等边三角形、正方形等。这些类型的第二透镜22均有可以保证在眼镜片1的球形或弧形的基础表面S1以彼此面接触的形式形成控制区20，并且控制区20形成周向、径向均匀 分布的第一透镜21，便于改善眼镜在正对控制区20时，眼镜所能感测到的物象清晰度。由控制子单元U的第二透镜22隔离开的空间(第一透镜)形成边缘到中心位置的距离基本等长的规则形状，这特别利于眼睛通过控制区视物的场景。
基于以上可以理解，具有正六边形面型的第二透镜22为最优形式的第二透镜22，其确保了第二透镜22围成的第一透镜21(0附加屈光度或较小屈光度)具有无限接近于圆形的形式，这可以在较大程度上保证所有控制区20的第一透镜21在黄斑点形成清晰物象。
对于本公开的第一透镜21、第二透镜22，其呈正六边形的外接圆的直径被设定在0.6mm-2.5mm的范围内。对于设有设置在该尺寸范围的第二透镜22小于瞳孔的直径，其可以确保瞳孔对应的视野受多个第二透镜22的相位调制作用，因此可以确保能够形成像面模糊效果。
优选地，在对应于瞳孔的视野范围内，这些第二透镜22在视网膜所形成的的弥散斑直径Dr满足：
Figure PCTCN2022072734-appb-000002
其中，ADD22为所述第二透镜的附加屈光力，D22为第二透镜的外接圆的直径，Pe+l为戴镜矫正后的眼镜片和眼睛组成的光学系统的整体屈光力，其中，Dr取自10μm-100μm。在瞳孔直径范围内，如若第二透镜22数量较多，第二透镜22的附加屈光力可以被设定为较小值；反之，如果第二透镜22数量较小，第二透镜22的附加屈光力可以被设定为较大值。对于这两种形式的第二透镜22设置方式，眼镜片1均可使得眼球获得满足像面模糊度要求的视觉效果。
优选地，各个控制子单元U被配置成使得第一透镜21在眼镜片1的周向以及和周向垂直的径向上等间距布置。在此，这也是为了保证第一透镜21与其他光学区10能够协同作用，保证佩戴者眼镜转动至控制区20时也能获得足以辨别物象的视力。
需要说明的，尽管上述本文上述表述中采用了“径向”，但该“径向”只是相对于周向而言的垂直方向，其表示为从眼镜片1的中间向 外缘的延伸方向，并不必然地隐含“眼镜片1具有圆形面型”的潜在含义。如前文所述，本公开的眼镜片1可以是具有矩形等其他非圆形的面型。
优选地，光学区10和控制区20是一体成形的。对于一体成形的眼镜片1而言，光学区10和控制区20之间的相对位置在加工过程中即被精准控制。对于粘贴形成的眼镜片1，控制区20和光学区10事实上难以确保精准控制光学区10和控制区20的相对位置。
然而，一体形成的光学区10和控制区20并不是必然的，例如，在图1所示的具有凸透镜形式的第二透镜22的实施例中，控制区20可以是通过粘接的方式固定于基础表面S上的。
此外，尽管图1-4的实施例中展示的控制区20形成于眼镜片1的远离眼球的物体侧表面，事实上，这仅为优选实施方式，控制区20还可以形成眼镜片1的靠近眼球的眼球侧表面；或者，同时在眼镜片1的物体侧表面和眼球侧表面同时形成控制区20。
本公开的保护范围仅由权利要求限定。得益于本公开的教导，本领域技术人员容易认识到可将本公开所公开结构的替代结构作为可行的替代实施方式，并且可将本公开所公开的实施方式进行组合以产生新的实施方式，它们同样落入所附权利要求书的范围内。

Claims (21)

  1. 一种眼镜片，所述眼镜片包括：
    光学区，所述光学区形成所述眼镜片的基础表面且具有基于眼球的处方的屈光力，所述光学区包括位于所述眼镜片的中央区域的中央光学区；以及
    控制区，所述控制区环绕所述中央光学区，所述中央光学区包括多个彼此贴合的控制子单元，每个控制子单元具有位于中央位置的第一透镜和环绕所述第一透镜的多个第二透镜，所述第一透镜和所述第二透镜具有不同的屈光力，各个第二透镜具有呈正多边形的面型，多个控制子单元中的至少一部分的各个所述第二透镜之间通过正多边形的边所在的面进行面接触，并且
    多个所述控制子单元被配置成使其形成的波面能够叠加在所述光学区的工作焦面上而形成均匀的弥散斑，所述弥散斑能够形成模糊的周边视觉图像。
  2. 根据权利要求1所述的一种眼镜片，其特征在于：所述第一透镜的屈光力P1与对应区域的光学区的屈光力P0满足以下关系：
    P1＝P0+ADD，其中，ADD为所述第一透镜的附加屈光力，其取自0-0.3D中的任意值。
  3. 根据权利要求2所述的一种眼镜片，其特征在于：多个所述控制子单元中的所述至少一部分的所述第一透镜与该控制子单元中的所有第二透镜面接触。
  4. 根据权利要求1所述的一种眼镜片，其特征在于：所述第二透镜为规则透镜，并且所述第二透镜在其中心处的法线方向与该位置的基础表面的法线方向相同。
  5. 根据权利要求1-4中任意一项所述的一种眼镜片，其特征在于：所述第二透镜的顶点形成于基础表面上。
  6. 根据权利要求5所述的一种眼镜片，其特征在于：所述第二透镜为设置在所述眼镜片的远离眼球的物体侧表面的凸透镜或凹透 镜，并且第二透镜的顶面的六条棱边与基础表面之间存在距离。
  7. 根据权利要求1-4中任意一项所述的一种眼镜片，其特征在于：至少80％的第二透镜具有相同的面型和屈光力，以使该部分第二透镜产生的波面相对于所述第一透镜所产生的波面具有相同的相位超前或相位滞后。
  8. 根据权利要求1所述的一种眼镜片，其特征在于：所述第二透镜的面型选自等边三角形、正方形、正六边形中的任意一种。
  9. 根据权利要求8所述的一种眼镜片，其特征在于：所述中央光学区具有基本上呈圆形的面型，所述圆形的半径r在3mm至10mm的范围内。
  10. 根据权利要求1所述的一种眼镜片，其特征在于：所述第一透镜和第二透镜的面型为相同的正六边形，所述控制子单元包括位于中间的一个第一透镜和环绕所述第一透镜的6*N个第二透镜，其中，所述N为取自1-5的整数。
  11. 根据权利要求10所述的一种眼镜片，其特征在于：所述N为1，并且在所述控制区的非边缘位置的控制子单元，每个所述第一透镜分别与6个第二透镜面接触。
  12. 根据权利要求10或11所述的一种眼镜片，其特征在于：多个所述控制子单元至少共用一部分所述第二透镜。
  13. 根据权利要求1或10所述的一种眼镜片，其特征在于：在对应于瞳孔的视野范围内，所述第二透镜在视网膜所形成的的弥散斑直径D r满足：
    Figure PCTCN2022072734-appb-100001
    其中，ADD 22为所述第二透镜的附加屈光力，D 22为第二透镜的外接圆的直径，P e+l为戴镜矫正后的眼镜片和眼睛组成的光学系统的整体屈光力，其中，D r取自10μm-100μm。
  14. 根据权利要求13所述的一种眼镜片，其特征在于：所述正多边形的外接圆的直径在0.6mm-2.5mm的范围内。
  15. 根据权利要求1所述的一种眼镜片，其特征在于：所述控制 区的外缘和眼镜片的外缘之间存在距离，并且，在眼镜片中心的法线方向，所述控制区的外缘基本上呈正多边形或圆形。
  16. 根据权利要求1所述的一种眼镜片，其特征在于：所述控制区的各个所述第一透镜被配置成使得眼睛经由这些第一透镜后可辨别物像。
  17. 根据权利要求16所述的一种眼镜片，其特征在于：各个所述控制子单元被配置成使得所述第一透镜在所述眼镜片的周向以及和周向垂直的径向上等间距布置。
  18. 根据权利要求5所述的一种眼镜片，其特征在于：所述眼镜片的表面经过镀膜处理，该膜具有高于所述眼镜片的基础材料的硬度。
  19. 根据权利要求1所述的一种眼镜片，其特征在于：所述光学区和所述控制区一体成形。
  20. 根据权利要求1或17所述的一种眼镜片，其特征在于：所述控制区形成于所述眼镜片的远离眼球的物体侧表面，或者眼镜片的靠近眼球的眼球侧表面。
  21. 一种框架眼镜，其特征在于，所述框架眼镜包括如权利要求1-20中任意一项所述的眼镜片。
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