Spectacle lenses and glasses

Abstract

The present disclosure relates to a spectacle lens, which includes an optical zone and a control zone, wherein the optical zone includes a central optical zone located in the central area of ​​the spectacle lens. The control zone is located at the periphery of the central optical zone, and includes a lens array composed of a plurality of first microlenses located at different positions of the spectacle lens, the microlens array occupies at least 20% of the surface area of ​​the control zone, wherein the equivalent normal of each first microlens is determined by its own position in the spectacle lens, so that each first microlens can work together to form an image focus focused in front of the retina, and the equivalent normal is the central rotation axis of the first microlens or the normal of the center position of the top surface of the first microlens. The microlenses on the spectacle lens of the present invention can be designed to be fixed, so as to meet the functions of myopia prevention and control, presbyopia correction, etc.

Description

Technical Field

[0001] The present disclosure relates to the field of ophthalmic equipment, and in particular to a spectacle lens that is intended to be worn in front of a person's eyes to inhibit the progression of myopia, assist in accommodation, and improve the near vision quality of presbyopia. Background Art

[0002] Traditional lenses mainly seek to correct vision for eyes that already have refractive errors. This type of lens is used as a form of relief to solve the defects of the eyes. After people wear this type of lenses (such as single-vision lenses), their vision will inevitably deteriorate further (for example, myopia will further deepen). People hope to actively control refractive errors (such as myopia, hyperopia, etc.) to prevent further deterioration of vision. Therefore, spectacle lenses are developing new functional lenses with myopia control effects based on traditional single-vision lenses.

[0003] Microstructured lenses have gradually become the mainstream of myopia prevention and control frame products. The principle is to form myopia defocus visual interference through the surface micro-lens design on the basis of providing prescription correction vision for the base lens.

[0004] For example, the eyeglasses disclosed in document CN104678572B (hereinafter referred to as "Document 1") have a first refractive area with a first refractive power as a base, and a second refractive area with a second refractive power. The second refractive area is discretely arranged on the periphery of the central optical area of ​​the eyeglasses. The second refractive area is a microlens design. Generally speaking, the second refractive area has an additional refractive power relative to the first refractive area so as to form myopic defocus. The parameters of each second refractive area (microlens) are the same, and the central normal direction of the microlens is the same as the base normal direction. The adverse effect brought about by this is that the second refractive areas (microlenses) in different areas do not work together to form a perfect myopic defocus, that is, a clear image cannot be formed in front of the retina. Specifically, since the second refractive area (microlens) has additional positive power, when the light passes through the area where the microlens is provided, the focal length actually becomes shorter and the image is formed in front of the retina (see Figure 2 ). See Figure 2 The imaging positions of the second refractive areas at different positions are different, so that each second refractive area forms a comprehensive Figure 2 In addition, the astigmatism caused by the oblique incidence of marginal rays will also affect the image quality.

[0005] Another problem with Document 1 is that if more second refractive areas are arranged, the myopia control effect of peripheral defocus will be strengthened, thereby achieving a good myopia prevention and control effect. However, this also means that the unclear image formed by the second refractive area on the retina will be more obvious. On the contrary, if fewer second refractive areas are arranged, the wearer's visual clarity will be improved, but the myopia prevention and control effect of peripheral defocus will be weakened.

[0006] Document CN113848656A further introduces a phase difference design based on Document 1, which further designs the second refractive area into corresponding second units and third units. The second unit and the third unit cooperate to form a phase difference, so as to reduce the glare and stimulation of the light to the eyes, so as to reduce the fatigue of the patient's eyes. However, this document still has the problems of Document 1.

[0007] Document CN115032815A further refines the design of microlenses. Specifically, it designs the center normal direction of each microlens to be the same as the base normal direction of the lens. Based on the disclosure of this document, the microlens group will further enhance the defocusing effect, and the image formed in front of the retina will be even less clear.

[0008] The above-mentioned various prior arts such as the disclosed documents all provide a peripheral approximate defocus effect that forms an unclear image in the periphery. Although the disclosed various prior arts also illustrate in a diagram how the microlens group cooperates to achieve focusing in front of the peripheral position of the retina to form a clear image, and the corresponding documents also state the "peripheral defocus myopia control theory", the prior arts do not explain how these microlenses should be arranged to cooperate to form a clear image.

[0009] In the prior art, there are similar prevention and control lenses designed with extended depth of focus technology. The extended depth of focus technology is to use certain zoom elements to expand the depth of field that the eye can see clearly within the self-focusing range, so as to ensure that the eye can see clear objects both near and far. However, the implementation mechanism of this type of technology is relatively complex. At present, it has only been used in embedded vision correction products such as artificial lenses. There is no systematic theory and verification on contact lenses and frame glasses.

[0010] Based on this, it is necessary to provide a lens that can meet the basic needs of patients for myopia prevention and control or presbyopia adjustment.

[0011] Public Content

[0012] In view of the above-mentioned status quo of eyeglasses according to the prior art, one of the purposes of the present disclosure is to provide an eyeglass that can inhibit the development of refractive errors of the eyes or improve the near vision of people with presbyopia while ensuring sufficient visibility and a good wearing feeling.

[0013] The object is achieved by disclosing a spectacle lens of the following form. The spectacle lens comprises an optical zone and a control zone. The optical zone can provide a correction effect for the vision of a patient with refractive error. A spectacle lens, the spectacle lens comprising:

[0014] an optical zone forming a base surface of the non-planar form of the spectacle lens and having a refractive power based on a base prescription of an eyeball, the optical zone including a central optical zone located in a central area of ​​the spectacle lens; and

[0015] A control zone, the control zone is located at the periphery of the central optical zone and includes a lens array composed of a plurality of first microlenses located at different positions of the eyeglass, the lens array occupies at least 20% of the surface area of ​​the control zone, wherein an equivalent normal line of each of the first microlenses is determined by its position on the eyeglass, so that each of the first microlenses can cooperate to form an image focus focused in front of the retina, and the equivalent normal line is a central rotation axis of the first microlens or a normal line of the center position of the top surface of the first microlens.

[0016] First, unlike the previous "peripheral defocus theory" that forms a blurred image in front of the retina to eliminate the "hyperopic defocus" caused to the eyeball, which in turn stimulates the lengthening of the eye axis and the deepening of myopia caused by it, in this case, the inventor also proposed a scheme for positive stimulation of the shortening of the eye axis. Specifically, in the process of conventional myopia patients seeing objects, the spectacle lenses according to the above scheme not only bring clear images to the patient's retina, but also form images in front of the patient's retina with the help of a special form of the first microlens, thereby stimulating the eyeball's eye axis to shorten, achieving a better myopia prevention and control effect.

[0017] Secondly, based on the basic concept that "the first microlens combination can be confocal in front of the retina to form a clear image in front of the retina", the inventors proposed the "equivalent normal" in combination with optical and geometric theories, and used it to constrain the orientation of the first microlens, which provides a practical and feasible solution for the orientation design and processing of each first microlens.

[0018] Preferably, the first microlens is a single focus lens, a multi-focus lens or a combination thereof, wherein the multi-focus lens is an aspheric lens, a lightsaber optical element, an axicon optical element or a peacock eye optical element. According to the sensitivity of different myopic patients, the inventor provides a variety of lens combinations.

[0019] Preferably, the first microlens includes a curved focusing portion at the top and a direction-adjusting portion at the bottom, the curved focusing portion has a curved surface, the equivalent normal is the normal of the center position of the curved surface, and the direction-adjusting portion is connected to the base surface and is configured to adjust the focusing direction of the first microlens. In this solution, the single-focus lens and the aspherical lens are geometrically divided into two virtual components, and the processing personnel can directly adjust the normal direction and the corresponding focal position of each first microlens by means of the vertex angle of the direction-adjusting portion facing the radial outside of the eyeglass lens. At the same time, this also simplifies the processing difficulty.

[0020] Preferably, when observed along the direction of the equivalent normal line, the surface shape of the first microlens is selected from any one of an arcuate shape, a circle, an equilateral triangle, a square, and a regular hexagon.

[0021] Preferably, the angle A between the equivalent normal direction of the first microlens and the normal direction of the base surface at the location is:

[0022]

[0023] Wherein, r is the distance between the intersection of the equivalent normal line of the first microlens and the top surface of the first microlens and the central axis of the central optical zone; n is the refractive index of the first microlens; ADD is the additional light intensity of the first microlens compared to the optical zone. Based on this, the processing designer can accurately obtain the deflection angle of each first microlens relative to the base surface of the eyeglass lens.

[0024] Preferably, the angle A is 0.02 rad≤A≤0.8 rad. The angle actually defines the distance between the first microlens and the center of the central optical zone, that is, defines the distribution position of the first microlens in the radial direction of the eyeglass lens.

[0025] Preferably, when observed along the equivalent normal direction, the maximum size D of the first microlens is 1 :0.5mm≤D 1 ≤5mm; and / or, in the direction of the equivalent normal line, the vector height D of the first microlens 2 :0.5μm≤D 2 ≤5μm.

[0026] Preferably, the intersection of the central rotation axis and the surface of the spectacle lens is taken as the center point of the lens, and the first microlens is arranged within a range of at least 30° of a central angle with the center point of the lens as the vertex, wherein the central angle is located in the quadrant where the lower semi-meridian of the spectacle lens is located. In this case, the wearer can see objects through the first microlens and observe clear images when looking at near objects.

[0027] Preferably, in the lower area of ​​the spectacle lens, the first microlenses are densely arranged in a sector-shaped area with the center point of the lens as the vertex, and the sector-shaped area has an axis that is 0.5mm-3mm translated from the lower semi-meridian toward the nose as the central axis. Therefore, even if the wearer's near eye moves inward, the sector-shaped area at the special position can still cover the field of view of the eye when viewing objects.

[0028] Preferably, the first microlenses are arranged at different radial positions with the center point of the lens as the center, and a plurality of the first microlenses are arranged at the same radial position with the center point of the lens as the center. Advantageously, this can comprehensively consider that as an extraocular lens that does not rotate with the eyeball, when the wearer rotates the eyeball, there is always a first microlens that can provide the wearer with at least one of the needs of myopia prevention and control, clear vision, etc.

[0029] Preferably, at at least one radial position centered on the center point of the lens, some or all of the first microlenses are attached to each other. More preferably, at at least one radial position centered on the center point of the lens, the first microlenses are arranged in a ring. For these first microlenses attached to each other, it is easier to provide a complete and clear image when the wearer is nearsighted.

[0030] Preferably, the central angles defined by the arrays composed of continuous first microlenses at adjacent radial positions are adjacent or staggered, and the first microlenses at adjacent radial positions have different refractive powers. In this way, it achieves another purpose of the present invention, that is, the purpose of "dynamic defocus". Specifically, when the wearer's eyes rotate circumferentially to different positions, different first microlenses provide different defocus stimuli, so that the corresponding cells and tissues of the glasses are in a non-single stimulation for a long time and are in a long-term activation state. These cells and tissues are guided to make the eye axis develop in the direction of shortening, thereby achieving a long-term good myopia prevention and control effect.

[0031] Preferably, the central angle defined by the first microlens group at the same radial position is any value within the range of 45°-180°.

[0032] Preferably, in the radial direction from the inside to the outside of the eyeglass, the refractive power of the first microlenses in different radial directions gradually increases. The inventors have found that cells / tissues at different radial positions of the eyeball have different sensitivities to refractive power. Specifically, cells / tissues at the radial periphery have relatively poor sensitivity to refractive power. Based on this, the inventors provide first microlenses with higher refractive power at the radial periphery of the eyeglass, so that the cells / tissues at these positions can also respond to this design, thereby controlling the growth of the eye axis.

[0033] Preferably, the lens array comprises a first lens array and a second lens array, wherein the focus formed by the first microlenses of the first lens array is different from the focus formed by the first microlenses of the second lens array.

[0034] Preferably, in the viewing direction of the central axis of the central optical zone, the boundary of the single focus lens or the aspherical lens toward the central axis is in an arc shape. On the one hand, this form of first microlens improves the overall appearance of the eyeglass lens; on the other hand, the processing method of this first microlens is relatively simple.

[0035] Preferably, the radius of the circular arc boundary of the single focus lens or aspherical lens is:

[0036]

[0037] Wherein, r is the distance between the intersection of the equivalent normal line of the first microlens and the top surface of the first microlens and the central axis of the central optical zone; R 1 is the equivalent radius of curvature of the arc surface of the arc focusing portion; A is the angle between the equivalent normal direction of the first microlens and the normal direction of the base surface at which it is located; and D is the diameter of the minimum circumscribed circle of the projection of the arc focusing portion on the base surface.

[0038] Preferably, the bottom of the first microlens protrudes outward from the base surface of the eyeglass lens.

[0039] Preferably, each corner of the first microlens is rounded and smoothly transitioned.

[0040] Preferably, the curvature radius of the rounded transition angle of each corner of the first microlens is 30%-55% of the curvature radius of the arc focusing portion. Advantageously, the amplitude of the rounded transition can effectively reduce the substantial negative impact of the rounded transition area on the various functions of the first microlens.

[0041] Preferably, the refractive index of at least part of the first microlenses is different from the refractive index of the region having the refractive power based on the basic prescription.

[0042] Preferably, the spectacle lens further comprises a second microlens located at the center of the central optical zone, and the central axis of the second microlens coincides with the central axis of the central optical zone. Particularly advantageously, the second microlens can be set as a lightsaber optical element, which can preferably extend the focal depth of the eye's vision, so that the wearer can obtain clear images of objects at long distances, medium distances, and near distances through the spectacle lens of this case.

[0043] In addition, the present disclosure actually also relates to a pair of frame glasses, which comprises any one of the spectacle lenses described above.

[0044] Based on the common sense in the art, the above-mentioned preferred implementation modes can be arbitrarily combined to obtain the preferred embodiments of the present disclosure.

[0045] The spectacle lenses designed in the present disclosure and the frame glasses having the spectacle lenses form high-quality visual images at a certain distance (range) in front of the retina through the micro-array lenses with synergistic effects. Based on such imaging, the wearer has more excellent effects in the myopia prevention and control scenario, such as improving comfort, providing a feasible depth of field extension effect, and assuming the role of "dual focus" for the wearer. In particular, in some embodiments, the wearer can obtain close-range vision without using human eye adjustment through the lens area. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to better understand the above and other purposes, features, advantages and functions of the present disclosure, reference may be made to the preferred embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present disclosure and have no limiting effect on the scope of the present disclosure, and the components in the drawings are not drawn to scale.

[0047] Figure 1 , 2 It is an optical principle diagram of using the existing spectacle lenses for far vision;

[0048] Figure 3 is a schematic structural diagram of a spectacle lens according to a first preferred embodiment of the present disclosure;

[0049] Figure 4 yes Figure 3 Optical principle diagram of eyeglass lenses;

[0050] Figure 5 yes Figure 4 A schematic diagram of a steering portion of a first microlens;

[0051] Figure 6 is a schematic structural diagram of a spectacle lens according to a second preferred embodiment of the present disclosure;

[0052] Figure 7 is a schematic diagram of processing a first microlens of a spectacle lens according to a second preferred embodiment of the present disclosure;

[0053] Figure 8 yes Figure 3 , 7 A schematic structural diagram of a local structure of a first microlens;

[0054] Fig. 9 is a schematic structural diagram of a spectacle lens according to a third preferred embodiment of the present disclosure;

[0055] Fig.10 is a schematic structural diagram of a spectacle lens according to a fourth preferred embodiment of the present disclosure;

[0056] Fig.11 , 12 is a schematic structural diagram of a spectacle lens according to a fourth preferred embodiment of the present disclosure;

[0057] Fig.13 It is a schematic structural diagram of the curved focusing portion of the first microlens of the eyeglass lens according to the fourth preferred embodiment of the present disclosure. DETAILED DESCRIPTION

[0058] Next, the disclosed concept of the present disclosure will be described in detail with reference to the accompanying drawings. Described here are only preferred embodiments according to the present disclosure, and those skilled in the art may think of other ways to implement the present disclosure on the basis of the preferred embodiments, and the other ways also fall within the scope of the present disclosure. In the following specific description, directional terms such as "upper", "lower", "inner", "outer", "longitudinal", "horizontal", etc. are used with reference to the directions described in the accompanying drawings. The components of the embodiments of the present disclosure can be placed in a variety of different directions, and the directional terms are used for illustrative purposes and are not restrictive.

[0059] In the present disclosure, the eyeglass 100 is an eyeglass 100 suitable for being worn in front of a person's eyes. The eyeglass 100 is not attached to the surface of the eyeball, but is mounted in front of the eye 2 through a metal frame or a plastic material frame.

[0060] Figure 3 (a) shows a front view of the spectacle lens 100, which corresponds to a viewing angle directly in front of the center of the spectacle lens 100; Figure 3 (b) shows a cross-sectional view of the eyeglass 100, which corresponds to Figure 1 The cross-sectional view is a vertical solid line view in FIG. 1 , wherein the cross-sectional view is used to simply show the top surface of the eyeglass lens 100 in the thickness direction and the first microlens 21 on the top surface. Figure 3 Except for the outermost solid line in (a), the remaining solid lines are for the purpose of convenience of explanation and do not constitute directly observable lines with optical properties on the eyeglass lens 100.

[0061] See also Figure 3 In the embodiment, the eyeglass lens 100 has a substantially circular surface shape as a whole. Alternatively, the eyeglass lens 100 may also have a rectangular, square or other special-shaped surface shape.

[0062] Unless otherwise specified, 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 observed along the normal line S1 of the center of the object or a local area of ​​the object.

[0063] See also Figure 3-4 , which shows a spectacle lens 100, which includes an optical zone 10 and a control zone 20, etc. Among them, Figure 3 The optical zone 10 in (a) includes an inner area defined by a central annular circle (hereinafter referred to as the "first microlens 21"), i.e., a central optical zone 11. The optical zone 10 can provide a correction effect for the vision of patients with refractive errors. The optical zone 10 of the spectacle lens 100 is optionally made of a material having a refractive index of 1.5 to 1.76 and suitable for use as the spectacle lens 100. The control zone 20 is used to form a uniform diffuse light spot, so that the wearer of the spectacle lens 100 forms a clear image of an object located in front of the retina, giving the eyeball a stimulus in the direction of shortening the eye axis.

[0064] The optical zone 10 forms the base surface S of the ophthalmic lens 100 (see Figure 3 b) and has a refractive power based on the prescription of the eyeball. The base surface S can be a rotationally symmetrical spherical or aspherical surface, or a non-rotationally symmetrical cylinder or sphero-cylindrical surface. The non-rotationally symmetrical cylinder or sphero-cylindrical surface can have different curvatures in the four quadrants.

[0065] The central optical zone 11 in the optical zone 10 generally has a circular surface shape, and the radius of the circle (the distance between the central optical zone 11 and the radial inner edge of the first microlens 21) is set to any value within the range of 3mm to 8mm, for example, 4mm, 5mm, 6mm, etc.

[0066] exist Figure 3 In the embodiment of the present invention, there is a distance between the outer edge of the control zone 20 and the outer edge of the eyeglass lens 100. Specifically, the area between the outer edge of the control zone 20 and the outer edge of the eyeglass lens 100 is also the optical zone 10 (i.e., the edge optical zone 10), and thus, in the direction from the center to the outer edge of the eyeglass lens 100, the eyeglass lens 100 is sequentially provided with an optical zone 10 (central optical zone 11), a control zone 20, and an optical zone 10 (edge ​​optical zone 10).

[0067] It should be noted that, although not shown, the eyeglass lens 100 is actually provided with any form of mechanism or structure such as a groove, a through hole, a protrusion, etc. near its outer edge and / or at its outer edge for fixing it. These mechanisms or structures are used to fix the eyeglass frame, etc., which are not the innovation of the present disclosure, and whether these contents are disclosed or not does not affect the feasibility of the present disclosure. Here, this article does not elaborate on them.

[0068] Continue to see Figure 3In this embodiment, in the normal direction of the center of the eyeglass 100 (corresponding to the central axis of the central optical zone 11, which is not necessarily the geometric central axis of the eyeglass 100), the outer edge of the control zone 20 defines a generally circular shape. In addition, the outer edge of the control zone 20 can also be generally square, regular hexagonal, rectangular, etc.

[0069] In the present disclosure, "generally circular or regular polygonal" means that, at the macro level, the outer edge of a region or component that a technician can discern is a circle or a regular polygon. For a region or component that is generally a regular polygon, its edge is not necessarily a straight line segment or a surrounding edge. The edge or surrounding edge can actually be a straight line segment, a wavy line segment, or other forms of broken lines, etc. On the basis that a technician can discern the shape defined by the outer edge of a region or component, the region or component is "generally circular or regular polygonal". For example, in Figure 3 In the example of "the outer edge of the control area 20 is generally circular", the outer edge of the control area 20 is actually a wavy side, but the technician can tell that the surface of the control area 20 defined by the outer edge of the control area 20 is "circular". Based on this, those skilled in the art can clearly understand the specific meaning of "generally" in the present disclosure.

[0070] Continue to see Figure 3 (a), the control zone 20 around the central optical zone 11 of the eyeglass 100 includes a lens array composed of a plurality of first microlenses 21 located at different positions of the eyeglass 100. Here, the coverage area of ​​the control zone 20 defined by the radial inner and radial outer edges of the first microlenses located at the radial innermost and radial outermost sides of the eyeglass 100 is regarded as the "control zone 20" of the present invention. The surface area of ​​the lens array composed of the various first microlenses occupies at least 20% of the surface area of ​​the control zone 20, more preferably, occupies 25%-80% of the surface area of ​​the control zone 20, for example, 50%, 67%, 72%, etc.

[0071] See also Figure 3 Combined with Figure 4 ,in, Figure 4 yes Figure 3 The optical principle diagram of the first embodiment is shown. Figure 4 In the figure, the light path through the first microlens 21 is shown as a dotted line, and the light path through the rest of the lens 100 is shown as a solid line. In the present invention, the equivalent normal line S2 of each first microlens 21 is determined by its position in the lens 100, so that each first microlens 21 can work together to form an image focus in front of the retina. The equivalent normal line S2 is the central rotation axis of the first microlens 21 or the normal line S1 at the center position of the top surface of the first microlens 21. Figure 3 In the embodiment (b), the equivalent normal line S2 is represented by the normal line S1 at the center of the top surface of the first microlens 21. Figure 3 (b), at different radial positions of the eyeglass lens 100, the angles between the equivalent normal line S2 of the first microlens 21 and the corresponding normal line S1 of the eyeglass lens 100 are different. With the help of such differentiated designs of the first microlenses 21, the combination of the first microlenses 21 can achieve practical confocality, and the confocal point is located in front of the retina.

[0072] Different from the previous "peripheral myopia defocus theory", which forms a blurred image in front of the retina to eliminate the "hyperopic defocus" caused to the eyeball, which in turn stimulates the lengthening of the eye axis and the deepening of myopia caused by it, in this case, the above scheme of the inventor not only eliminates the "hyperopic defocus", but also further proposes a positive stimulation for shortening the eye axis. Specifically, in the process of conventional myopic patients viewing objects, the spectacle lens 100 according to the above scheme not only brings a clear image to the patient's retina, but also forms a clear image in front of the patient's retina with the help of a special form of the first microlens 21 combination, thereby stimulating the eyeball's eye axis to shorten toward the image focus defined by each first microlens 21 combination, thereby stimulating the eye axis to shorten, thereby achieving a better myopia prevention and control effect.

[0073] In order to achieve the machinability of the above scheme, the inventor proposed an "equivalent normal" based on the basic concept that "the first microlens 21 combination can be confocal in front of the retina to form a clear image in front of the retina" in combination with optical and geometric theories, and used it to constrain the orientation of the first microlens 21. When the scheme of the present invention is processed by turning, injection molding, etc., the equivalent normal S2 can be used to adjust the moving path of the turning tool, the direction and depth of the depression or protrusion at the position of the first microlens 21 in the injection mold.

[0074] The following combination Figure 3 (b) and Figure 4 The following schematically illustrates how to use the “equivalent normal line S2” to define the position of the first microlens 21. Figure 3 (b) and Figure 4 Here, according to the geometric characteristics of the first microlens of the present invention, the inventor divides it into a top arc focusing portion and a bottom adjustment portion 21B. Figure 3 (b) and Figure 4 In the figure, the solid line between the arc focusing portion and the direction adjusting portion 21B is shown to illustrate the boundary between the two and to illustrate how the present invention adjusts the direction of the equivalent normal S2 of each first microlens 21. In an actual lens, the solid line is not clear and even cannot be observed.

[0075] The arc focusing portion of the first microlens 21 has an arc surface. The arc is a spherical arc or an aspherical arc. For an axicon optical element, the arc surface is actually a cone surface. In this embodiment, the equivalent normal line S2 is the normal line of the center position of the arc surface. The direction adjustment portion 21B is connected to the base surface S, that is, Figure 3 As shown, the steering portion 21B is attached to the base surface S, or as not shown, the steering portion 21B is partially or completely embedded in the base surface S. The steering portion 21B is configured to adjust the focusing direction of the first microlens 21 .

[0076] See Figure 3 (b) The angle A between the direction of the equivalent normal line S2 of each first microlens 21 and the direction of the normal line S1 of the base surface S at the location is actually given by Figure 6 The angle A between the direction of the equivalent normal line S2 of the first microlens 21 and the direction of the normal line S1 of the base surface S at the location can be set to:

[0077]

[0078] Among them, r is the distance between the intersection of the equivalent normal line S2 of the first microlens 21 and the top surface of the first microlens 21 and the central axis of the central optical zone 11; n is the refractive index of the first microlens 21; ADD is the additional light power of the first microlens 21 compared to the optical zone 10. Based on this, the processing designer can accurately obtain the deflection angle of each first microlens 21 relative to the base surface S of the eyeglass lens 100.

[0079] The above-mentioned angle A is set in the range of 0.02rad-0.8rad. This angle actually limits the center position of the first microlens 21 from the central optical zone 11, that is, it limits the radial distribution position of the first microlens 21 on the eyeglass lens 100. For the use scenario of presbyopia, the older the age, the greater the additional light required, and the angle A can be set relatively large; on the contrary, relatively young patients with initial presbyopia need relatively weak lenses for auxiliary vision, and the angle A can be set relatively small. In general, the range of angle A can be determined according to the age of the patient with refractive error.

[0080] In one embodiment, the eyeglass lens 100 may be configured to have a diameter of 70 mm (r may be set to 3-30 mm), and the additional diopter may be set to between 100-400 degrees (ie, 1-4D).

[0081] Observed along the direction of the equivalent normal line S2, the maximum size D of the first microlens 21 is 1In a preferred embodiment, the first microlenses 21 at different radial positions can be set to have a uniform maximum size D 1 , to simplify processing. Maximum size D 1 The maximum size D of the first microlens 21 can be appropriately selected according to the total size of the eyeglass lens 100. 1 Gradually increase.

[0082] In the direction of the equivalent normal line S2, the vector height D of the first microlens 21 is 2 Set to any value in the range of 0.5μm-5μm. Figure 3 , 4 The surface of the arc focusing portion 21A is a regular microlens with a continuous smooth surface. The vector height D of the first microlens 21 is 2 A relatively small value can be taken, such as the arrow height D 2 The value may be within the range of 0.5 μm to 2 μm. For an irregular microlens whose surface of the arc focusing portion 21A is a discontinuous smooth surface, the sag height D of the first microlens 21 2 A relatively large value can be taken, such as the arrow height D 2 The possible values ​​are between 1.2 μm and 5 μm.

[0083] for Figure 3 , 4 Each first microlens 21 can be selected as a single-focus lens, a multi-focus lens in the form of an aspherical lens, or a combination of the two. Preferably, the first microlens 21 is a single-focus lens, so that it can be manufactured with a relatively simple process on the basis of achieving confocality of the lens array, thereby reducing the single-piece manufacturing cost of the eyeglass lens 100, making the eyeglass lens 100 more acceptable to low-income groups.

[0084] Optionally, with the optical center axis of the eyeglass lens 100 as the center axis, at least part of the first microlenses 21 are arranged rotationally symmetrically with respect to the center axis.

[0085] Observe along the direction of the equivalent normal S2, Figure 3 The surface shape of the first microlens 21 of the embodiment is circular. Alternatively, the surface shape of the first microlens 21 may be any one of an arcuate shape, a circle, an equilateral triangle, a square, and a regular hexagon.

[0086] The first microlenses 21 on the spectacle lens 100 are arranged at different radial positions centered on the center point of the lens, and a plurality of first microlenses 21 are arranged at the same radial position centered on the center point of the lens. Advantageously, this can comprehensively consider that as an extraocular lens that does not rotate with the eyeball, when the wearer rotates the eyeball, there is always the first microlens 21 that can provide the wearer with at least one of the needs of myopia prevention and control, clear vision, etc.

[0087] Continue to see Figure 3 (a), preferably, at least one radial position centered on the center point of the lens, some or all of the first microlenses 21 are attached to each other. More preferably, at least one radial position centered on the center point of the lens, the first microlenses 21 are arranged in a ring. For these first microlenses 21 attached to each other, it is easier to provide a complete and clear image when the wearer is near vision.

[0088] As a preferred embodiment, the lens array at the boundary position of the central optical zone 11 is generally set to Figure 3 (a) shows an annular lens array of first microlenses 21 attached to each other. The position of the annular lens array corresponds to the projection area formed on the eyeglass lens 100 by the light path defined by the fovea and the limbus when the wearer is looking far away. According to research, the annular lens array in this area can play the most effective optical stimulation role at this time.

[0089] Other embodiments are described below in conjunction with other drawings. Figure 3-5 The different parts of the embodiments shown are described in detail, and the contents not described in detail can be combined with Figure 3-5 And the corresponding text description for understanding.

[0090] See also Figure 6-7 , which shows a second embodiment of a lens array composed of first microlenses 21 with arcuate surfaces. In the viewing direction of the central axis of the central optical zone 11, the boundary of the single focus lens or aspherical lens toward the central axis is in an arc shape.

[0091] Preferably, the radius of the arc-shaped boundary of the single-focus lens or aspherical lens is:

[0092]

[0093] Wherein, r is the distance between the intersection of the equivalent normal line S2 of the first microlens 21 and the top surface of the first microlens 21 and the central axis of the central optical zone 11; R 1 is the equivalent radius of curvature of the arc surface of the arc focusing portion; A is the angle between the direction of the equivalent normal line S2 of the first microlens 21 and the direction of the normal line S1 of the base surface S at which it is located; D is the diameter of the minimum circumscribed circle of the projection of the arc focusing portion on the base surface S.

[0094] See also Figure 7 , which shows the processing process of the first microlens 21 involved in the present invention. The lens is first formed into a prototype of the first microlens 21 (referred to as "blank lens 23") marked as 23 in the figure by injection molding or other methods in one go in step 1. The top surface morphology of the blank lens 23 corresponds to the top surface of the first microlens 21 to be formed. Then, in step 2, the d portion of the blank lens 23 is cut.

[0095] according to Figure 7 As shown in FIG. 1 , the angle A between the equivalent normal line S2 of the first microlens 21 and the normal line S1 of the base surface S at that position satisfies:

[0096]

[0097] Combination Figure 6 (a) and Figure 7 In order to process the required deflection angle A of the first microlens 21, the tool operating radius R 2 Set it to:

[0098] R 2 =r- (Dd) Formula (4);

[0099] Combined with the above formula (3), the operating radius R can be obtained 2 is the above formula (2).

[0100] Combination Figure 7 It can be seen that when the cutting portion in step 2 is large, the deflection angle A of the first microlens 21 formed is large; conversely, when the cutting portion is small, the deflection angle A is small. According to the present invention, the cutting portion d needs to be set to be less than D / 2, so as to ensure that the lens array formed by the first microlens 21 accounts for a large proportion in the control area 20, and the first microlens 21 forms a stimulating or near vision effect.

[0101] Understandably, according to Figure 7 In the processing technology shown in the embodiment, in the case of first microlenses 21 with uniform or slightly different surface morphology, the same set of injection molds can be used to process the corresponding eyeglass lenses 100. Specifically, in step 1, the first microlenses 21 without differentiation can be processed, and then the differentiated first microlenses 21 can be processed in step 2. Therefore, Figure 7 This type of manufacturing method for the first microlens 21 can be used in the orientation adjustment process of the first microlens 21 with various surface shapes.

[0102] See also Figure 8As a preferred method, the first microlens 21 obtained by the above step 2 can be further processed by lathe or manual processing to make each corner 21C, 21D smooth transition. Preferably, the curvature radius of the smooth transition angle of each corner 21C, 21D of the first microlens 21 is 30%-55% of the curvature radius of the arc focusing portion. Advantageously, the amplitude of the smooth transition can effectively reduce the substantial negative impact of the smooth transition area on the various functions of the first microlens 21.

[0103] It can be understood that the first microlens 21 obtained without processing in steps 1 and 2 can also be processed in a smooth transition manner.

[0104] Fig. 9 FIG. 2 shows a front view of an eyeglass lens 100 according to another embodiment of the present invention. Fig. 9 As shown, the intersection of the central rotation axis and the surface of the spectacle lens 100 is the center point of the lens, and the first microlens 21 is arranged within a central angle range of 30°-70° with the center point of the lens as the vertex, wherein the central angle is located in the quadrant where the lower semi-meridian of the spectacle lens 100 is located. At this time, the wearer can see objects through the first microlens 21 and observe clear images when looking at near objects. This embodiment solves the problem of difficulty in near vision for patients with presbyopia.

[0105] More preferably, the array of first microlenses 21 densely arranged in the fan-shaped area below the eyeglass 100 with the center point of the lens as the vertex is not arranged symmetrically about the lower semi-meridian of the eyeglass 100, but instead, the fan-shaped area has an axis that is 0.5mm-3mm translated toward the nose side from the lower semi-meridian as the central axis. Advantageously, in this case, even if the wearer's near eye 2 moves inward for near vision, the fan-shaped area at the special position can still cover the field of view of the eye 2 when viewing objects.

[0106] See below Fig.10 , which shows a front view of an eyeglass lens 100 according to another embodiment of the present invention. According to statistics from some researchers, existing myopia prevention and control products generally have a relatively obvious myopia prevention and control effect in a short period of time, but the myopia prevention and control effect in the later period is not obvious. In view of this, the inventor believes that the reason for this phenomenon is that after a long period of the same stimulation, the human eye cells have developed stimulation inertia and will not make obvious feedback to the same stimulation. For this reason, the inventor proposed Fig.10 The embodiment with dynamic defocus stimulation effect shown in the figure is different from the above-mentioned embodiment in that the spectacle lens 100 in this embodiment is provided with first microlenses 21 with different refractive powers at different circumferential positions thereof. Fig.10In the embodiment, the center angle defined by the continuous first microlenses 21 in the same circumferential direction is 180°. The center angles defined by the continuous first microlenses 21 in adjacent radial positions are adjacent. Alternatively, the center angle defined by the continuous first microlenses 21 in the same circumferential direction can be other values ​​within the range of 45°-180°.

[0107] In addition, more than one group of continuous first micro lenses 21 may be optionally arranged in the same circumferential direction. Fig.11 The innermost group of microlenses in the radial direction is split into two groups of microlenses with a phase angle difference of 180°. In addition, the central angles defined by the consecutive first microlenses 21 at adjacent radial positions are not necessarily adjacent in a manner of overlapping boundaries, but can also be staggered in a manner of complementary overlapping. The overlapping portion of the central angle can be set to any value within the range of 0°-10°.

[0108] In this way, another purpose of the present invention is achieved, that is, the purpose of "dynamic defocus stimulation". Specifically, when the wearer's eye 2 rotates to different positions, different first microlenses 21 provide different defocus stimulations, so that the corresponding cells and tissues of the eye are in a non-single stimulation for a long time and are in a long-term activation state. These cells and tissues are guided to develop in the direction of shortening the eye axis, thereby achieving a long-term good myopia prevention and control effect.

[0109] See also Fig.11 , 12 FIG. 1 is a schematic diagram of an optical path of a spectacle lens 100 according to another embodiment of the present invention. In this embodiment, the arc-shaped focusing portion 21A of the first microlens 21 is Fig.13 The light sword element (the first micro lens 21 corresponding to the light sword element is the light sword optical element) shown in FIG. 1 is a light sword optical element. The curvature radius of the surface of one axial end of the light sword element (hereinafter referred to as the "optical surface") is gradually changed in its circumferential direction. In the circumferential direction of the optical surface of the light sword element, a step 24 is formed at a position where the curvature radius is the smallest and the curvature radius is the largest. Based on this design of the end surface of the light sword element, the light sword element has the following features: Fig.13 The multiple focal points shown are f1, f2, f3, f4, f5, etc. These focal points are connected to form a focal segment. The structure of the lightsaber element belongs to the known technology and will not be described in detail here.

[0110] When using Fig.13 When the lightsaber element shown is used as the arc focusing portion 21A of the first microlens 21, the direction adjustment portion 21B is used to adjust the focal length of the first microlens 21 (lightsaber optical element) to be consistent. Fig.12When the ametropia patient is looking far, the basic lens with the basic prescription refractive power can focus the image on the retina, and the lens array focuses the image in the focal length in front of the retina, which promotes the shortening of the eye axis of the eye 2. When the ametropia patient is looking near, the basic lens with the basic prescription refractive power can focus the image behind the retina, and the lens array can focus the image into the retina. Since the focus formed by the lightsaber element is in the form of a "focal length", it can ensure that the wearer can obtain relatively clear images when looking at objects at different near distances.

[0111] It should be understood that, in addition to the arc focusing portion 21A in the form of a lightsaber element, the Axicon Element and the Peacock Element can achieve similar effects. Therefore, the corresponding Axicon Element and the Peacock Element defined by the Axicon Element and the Peacock Element also belong to the technical solution that the inventor seeks to protect.

[0112] Other notes

[0113] It should be noted that although Figure 3 The schematic diagrams only show an example in which the bottom of the first microlens 21 protrudes outward from the base surface S of the eyeglass lens 100. The bottom of the first microlens 21 may be completely embedded in the base surface S, or partially embedded in the base surface S.

[0114] In addition, according to Formula 1, the refractive index of at least a portion of the first microlenses 21 is different from the refractive index of the region having the refractive power based on the basic prescription.

[0115] Preferably, the spectacle lens 100 further comprises a second microlens 22 located at the center of the central optical zone 11, and the central axis of the second microlens 22 coincides with the central axis of the central optical zone 11. Particularly advantageously, the second microlens 22 can be set as a lightsaber optical element, which can preferably extend the focal depth of the eye 2, so that the wearer can obtain clear images at long-distance, medium-distance and near-distance viewing through the spectacle lens 100 of this case.

[0116] In addition, the present disclosure actually also relates to a pair of frame glasses, which comprises any of the above-mentioned eyeglass lenses 100 .

[0117] It should be noted that, although the above description in this article uses "radial direction", the "radial direction" is only the vertical direction relative to the circumferential direction, which is expressed as the extension direction from the middle to the outer edge of the eyeglass lens 100, and does not necessarily imply the potential meaning of "the eyeglass lens 100 has a circular surface shape". As mentioned above, the eyeglass lens 100 of the present disclosure can have other non-circular surface shapes such as a rectangle.

[0118] Preferably, the optical zone 10 and the control zone 20 are integrally formed. For the integrally formed spectacle lens 100, the relative position between the optical zone 10 and the control zone 20 is precisely controlled during the manufacturing process. For the spectacle lens 100 formed by pasting, it is actually difficult to ensure precise control of the relative position between the control zone 20 and the optical zone 10.

[0119] However, it is not necessary for the optical zone 10 and the control zone 20 to be formed integrally. For example, in the embodiment shown in the figure with the first microlens 21 in the form of a convex lens, the control zone 20 can be fixed to the base surface S by bonding.

[0120] In addition, despite Figure 1-13 The control zone 20 shown in the embodiment is formed on the object side surface of the lens 100 away from the eyeball. In fact, this is only a preferred embodiment. The control zone 20 can also be formed on the eyeball side surface of the lens 100 close to the eyeball; or, the control zone 20 can be formed on both the object side surface and the eyeball side surface of the lens 100.

[0121] The protection scope of the present disclosure is limited only by the claims. Thanks to the teachings of the present disclosure, those skilled in the art will easily recognize that alternative structures of the structures disclosed in the present disclosure can be used as feasible alternative embodiments, and the embodiments disclosed in the present disclosure can be combined to produce new embodiments, which also fall within the scope of the appended claims. Description of the drawings:

[0123] Lenses: 1, 100.

[0124] Eyes:2.

[0125] Retina:3.

[0126] Lenslets:4.

[0127] Optical zone: 10

[0128] Central optical zone: 11.

[0129] Outer optical zone: 12.

[0130] Controlled areas: 20.

[0131] First microlens:21.

[0132] Second microlens:22.

[0133] Blank mirror:23.

[0134] Base Surface:S.

[0135] Normal of the base surface: S1.

[0136] Equivalent normal of the first microlens: S2.

[0137] The arc-surface focusing portion of the first microlens: 21A.

[0138] The direction adjustment portion of the first microlens: 21B.

Claims

1. A spectacle lens, It is characterized in that The spectacle lenses include: an optical zone forming a base surface of the non-planar form of the spectacle lens and having a refractive power based on a base prescription of an eyeball, the optical zone including a central optical zone located in a central area of ​​the spectacle lens; and a control zone, the control zone being located at the periphery of the central optical zone and comprising a lens array consisting of a plurality of first microlenses located at different positions of the eyeglass, the microlens array occupying at least 20% of the surface area of ​​the control zone, wherein an equivalent normal line of each of the first microlenses is determined by its position on the eyeglass, so that each of the first microlenses can cooperate to form an image focus in front of the retina, and the equivalent normal line is a central rotation axis of the first microlens or a normal line of a central position of a top surface of the first microlens, The angle A between the equivalent normal direction of the first microlens and the normal direction of the base surface where it is located is: ； Wherein, r is the distance between the intersection of the equivalent normal line of the first microlens and the top surface of the first microlens and the central axis of the central optical zone; n is the refractive index of the first microlens; ADD is the additional luminosity of the first microlens compared to the optical zone, and the angle A satisfies: 0.02rad≤A≤0.8 rad.

2. The spectacle lens according to claim 1, in, The first microlens is a single-focus lens, a multi-focus lens or a combination thereof, wherein the multi-focus lens is an aspheric lens, a lightsaber optical element, an axicon optical element or a peacock eye optical element.

3. The spectacle lens according to claim 2, in, The first microlens includes a curved focusing portion located at the top and a direction adjusting portion located at the bottom, the curved focusing portion has a curved surface, the equivalent normal line is a normal line at a center position of the curved surface, and the direction adjusting portion is connected to the base surface and is configured to adjust the focusing direction of the first microlens.

4. The spectacle lens according to claim 1, in, When observed along the direction of the equivalent normal line, the surface shape of the first microlens is selected from any one of an arcuate shape, a circle, an equilateral triangle, a square, and a regular hexagon.

5. The spectacle lens according to claim 1, in, Observed along the equivalent normal direction, the maximum size D of the first microlens is 1 : 0.5mm≤D 1 ≤5mm; and / or In the direction of the equivalent normal line, the vector height D of the first microlens 2 : 0.5μm≤D 2 ≤5μm。 6. The spectacle lens according to claim 1 or 4, in, The intersection of the central axis of the central optical zone and the surface of the eyeglass lens is taken as the center point of the lens, and the first microlens is arranged within a central angle range of at least 30° with the center point of the lens as the vertex, wherein the central angle is located in the quadrant where the lower semi-meridian of the eyeglass lens is located.

7. The spectacle lens according to claim 6, in, In the lower area of ​​the spectacle lens, the first microlenses are densely arranged in a fan-shaped area with the center point of the lens as the vertex, and the fan-shaped area has an axis that is translated 0.5mm-3mm toward the nose side from the lower semi-meridian as the central axis.

8. The spectacle lens according to claim 6, in, The first microlenses are arranged at different radial positions with the center point of the lens as the center, and a plurality of the first microlenses are arranged at the same radial position with the center point of the lens as the center.

9. The spectacle lens according to claim 8, in, At at least one radial position centered on the center point of the lens, part or all of the first microlenses are in contact with each other.

10. The spectacle lens according to claim 8 or 9, in, The first microlenses are arranged in a ring shape at at least one radial position centered on the center point of the lens.

11. The spectacle lens according to claim 8 or 9, in, The central angles defined by the array composed of continuous first microlenses at adjacent radial positions are adjacent or staggered, and the first microlenses at adjacent radial positions have different refractive powers.

12. The spectacle lens according to claim 11, in, The central angle defined by the first microlens group at the same radial position is any value within the range of 45°-180°.

13. The spectacle lens according to claim 8 or 9, in, In the radial direction from the inside to the outside of the eyeglass lens, the refractive powers of the first microlenses in different radial directions gradually increase.

14. The spectacle lens according to claim 8 or 9, in, The lens array includes a first lens array and a second lens array, wherein a focus formed by the first microlenses of the first lens array is different from a focus formed by the first microlenses of the second lens array.

15. The spectacle lens according to claim 3, in, In the viewing angle direction of the central axis of the central optical zone, the boundary of the single-focus lens or aspherical lens toward the central axis is in an arc shape.

16. The spectacle lens according to claim 15, in, The radius of the circular arc boundary of the single focus lens or aspherical lens is: Wherein, r is the distance between the intersection of the equivalent normal line of the first microlens and the top surface of the first microlens and the central axis of the central optical zone; R 1 is the equivalent radius of curvature of the arc surface of the arc focusing portion; A is the angle between the equivalent normal direction of the first microlens and the normal direction of the base surface at which it is located; and D is the diameter of the minimum circumscribed circle of the projection of the arc focusing portion on the base surface.

17. The spectacle lens according to claim 3 or 15, in, The bottom of the first microlens protrudes outward from the base surface of the eyeglass lens.

18. The spectacle lens according to claim 15, in, Each corner of the first microlens is rounded and smoothly transitioned.

19. The spectacle lens according to claim 18, in, The curvature radius of the smooth transition angle of each corner of the first microlens is 30%-55% of the curvature radius of the arc focusing portion.

20. The spectacle lens according to claim 1, in, The refractive index of at least a portion of the first microlenses is different from the refractive index of the region having the refractive power based on the basic prescription.

21. The spectacle lens according to claim 1, in, The eyeglass lens further comprises a second microlens located at a central position of the central optical zone, and a central axis of the second microlens coincides with a central axis of the central optical zone.

22. A pair of frame glasses, It is characterized in that The frame glasses include the spectacle lenses according to any one of claims 1 to 21.

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