Ophthalmic lens and eyeglasses

Abstract

The utility model relates to an ophthalmic lens and glasses. The ophthalmic lens includes a central region having a prescription refractive power based on a prescription of the human eye, a plurality of first refractive regions closer to the central region than the plurality of second refractive regions, and a plurality of second refractive regions closer to the central region than the plurality of second refractive regions. A pitch between the plurality of first dioptric regions is smaller than a pitch between the plurality of second dioptric regions, each of at least a portion of the first dioptric regions and / or at least a portion of the second dioptric regions being configured to have a plurality of dioptric powers different from a prescribed dioptric power and having a positive additional power with respect to the prescribed dioptric power. Therefore, the out-of-focus stimulation requirements of different myopic patients or different retina areas of the same myopic patient are met, and the compliance of the myopic patients can be improved.

Description

Technical Field

[0001] This utility model relates to the field of ophthalmic optics, and in particular to an ophthalmic lens and eyeglasses. Background Technology

[0002] Myopia among children and adolescents has become a significant social problem. Currently, the myopia rate among children and adolescents is as high as 52.7%, with a trend towards younger onset and a persistently high proportion of high myopia. A 2021 report by Professor Li Ling, "Report on the Prevention and Control of Myopia in Children and Adolescents in the Information Age," indicates that at least 960 million people in China will be nearsighted in the future. Myopia has become the disease most affecting the visual health of children and adolescents.

[0003] The health of children and adolescents is crucial to the nation's strategic development, making myopia control an urgent priority. In 2019, the "White Paper on Myopia Control (2019)," authored by industry experts, provided scientific and effective methods and means for myopia control. With the increasing severity of myopia and the rapid development of science and technology, technical methods are constantly being supplemented and upgraded. Clinically, it is necessary to comprehensively consider individual conditions and provide children and adolescents with scientific and personalized myopia control plans.

[0004] Commonly used myopia control products include orthokeratology lenses, defocus soft lenses, defocus RGP lenses, defocus eyeglasses, and low-concentration atropine, among others. Specially designed defocus eyeglasses, with their advantages of ease of wear and fewer adverse reactions, have become one of the main choices for clinical myopia control technology. In recent years, advances in myopia control mechanisms have provided new insights into the design of specially designed eyeglasses.

[0005] Multi-point myopia defocus design frames feature a clear monofocal optical zone in the central area of ​​the lens, allowing a portion of the image from the fundus to focus on the retina. Simultaneously, based on the principle of "optical myopic defocus," closely packed microlenses around the periphery of the lens create peripheral retinal myopic defocus, causing another portion of the image to focus in front of the retina. The brain selectively uses the image "on the retina" to "see clearly," while using the image "in front of the retina" to "control myopia progression," thereby inhibiting axial elongation and slowing the increase in myopia.

[0006] The market is seeing an increasing number of microstructured eyeglass lenses based on the principle of "optical myopia defocus," with diverse optical designs and varying myopia control effects. Research indicates that different populations and different areas of the retina respond significantly differently to the optical defocus signals of myopia control products. This means that even highly effective myopia control products based on the optical myopia defocus principle will not respond at all to at least 20% of the population, failing to achieve the desired control effect.

[0007] In addition, there is a demand for myopia control lenses that can improve patient compliance with wearing them. Utility Model Content

[0008] One of the technical problems to be solved by this invention is how to design a lens that can simultaneously meet the defocus stimulation needs of different patients or different retinal areas of the same patient, and improve patient compliance.

[0009] According to a first aspect of the present invention, an ophthalmic lens is provided, comprising a central region, a plurality of first refractive regions, and a plurality of second refractive regions, the central region having a prescription refractive power based on a prescription for the human eye, the plurality of first refractive regions being closer to the central region than the plurality of second refractive regions, the spacing between the plurality of first refractive regions being smaller than the spacing between the plurality of second refractive regions, and each refractive region of at least a portion of the first refractive regions and / or at least a portion of the second refractive regions being configured to have a plurality of refractive powers different from the prescription refractive power and having a positive additional focal power relative to the prescription refractive power.

[0010] Optionally, at least one of the at least partial first refractive region and / or at least partial second refractive region is provided with an axial pyramid lens, the axial pyramid lens being used to provide a plurality of consecutive additional focal powers corresponding to its depth of focus range.

[0011] Optionally, the additional focal power is selected from the range of additional focal power values, which is used to characterize the range of additional focal power sensitivity corresponding to different retinal regions of different users and / or the same user that can suppress axial elongation in response to peripheral myopic defocus signals, based on statistical determination.

[0012] Optionally, the additional focal length ranges from +2.00D to +5.00D.

[0013] Optionally, at least one of the at least partial first refractive region and / or at least partial second refractive region is provided with a microlens assembly, the microlens assembly including a predetermined number of microlens regions, each of the microlens regions being used to provide a positive additional focal power, and different microlens regions in the same microlens assembly providing different additional focal powers.

[0014] Optionally, the microlens assembly is composed of multiple microlenses with different radii of curvature stacked in concentric rings, with the central region of the microlens assembly and each concentric ring region surrounding the central region corresponding to a microlens region.

[0015] Optionally, the microlens assembly is a multifocal Fresnel lens with a diffraction ring structure, wherein each diffraction ring structure in the multifocal Fresnel lens corresponds to one of the microlens regions.

[0016] Optionally, the microlens assembly includes a plurality of annular lenses arranged in a concentric ring configuration, with a predetermined interval between adjacent annular lenses, and each annular lens corresponding to one of the microlens regions.

[0017] Optionally, the radius of curvature of different microlens regions within the same microlens assembly decreases in a step-like manner from the inside to the outside; or the radius of curvature of different microlens regions within the same microlens assembly increases in a step-like manner from the inside to the outside.

[0018] According to a second aspect of the present invention, eyeglasses for preventing or delaying the progression of myopia are provided, comprising the lenses described in the first aspect above.

[0019] Therefore, this invention configures a single myopic defocus region (first refractive region, second refractive region) to have multiple myopic defocus focal points, and sets a higher density myopic defocus region (i.e., the first refractive region) in the region relatively closer to the central optical zone (i.e., the central region) (such as near the central optical zone), and sets a lower density myopic defocus region (i.e., the second refractive region) in the region relatively farther away from the central optical zone. This allows the defocus stimulation needs of different myopic patients, or different retinal regions of the same myopic patient, to be met, while also improving the compliance of myopic patients. Attached Figure Description

[0020] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0021] Figure 1 A schematic diagram of the structure of an ophthalmic lens according to an embodiment of the present invention is shown.

[0022] Figure 2 A schematic diagram of the structure of an ophthalmic lens according to another embodiment of the present invention is shown.

[0023] Figure 3 A schematic diagram of the structure of an ophthalmic lens according to another embodiment of the present invention is shown.

[0024] Figure 4 A schematic diagram of the structure of an ophthalmic lens according to another embodiment of the present invention is shown.

[0025] Figure 5A schematic diagram of the structure of an ophthalmic lens according to another embodiment of the present invention is shown.

[0026] Figure 6 A schematic diagram of the structure of an ophthalmic lens according to another embodiment of the present invention is shown.

[0027] The labels in the attached diagram have the following meanings: 1. Central region; 2. First refractive region; 3. Second refractive region. Detailed Implementation

[0028] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0029] Those skilled in the art should understand that the terms "first," "second," etc., in this utility model are used to distinguish similar objects, rather than to describe a specific order or sequence, and do not have any additional limiting effect.

[0030] This invention proposes configuring a single myopic defocus region (i.e., the first refractive region and the second refractive region mentioned below) with multiple myopic defocus focal points. Thus, when a wearer wears glasses made with this lens, multiple defocus signals at different locations are formed in front of the wearer's retina, thereby meeting the defocus stimulation needs of different patients or different retinal regions of the same patient. When the multiple myopic defocus focal points are designed in a reasonable manner, the product has a wider range of applicable users.

[0031] Meanwhile, this invention also proposes to set a higher-density myopia defocus area (i.e., the first refractive area) in a region relatively closer to the central optical zone (i.e., the central area) of the lens (such as near the central optical zone), and to set a lower-density myopia defocus area (i.e., the second refractive area) in a region relatively farther away from the central optical zone. This can achieve better myopia control while improving patient compliance.

[0032] Therefore, by adopting the above two aspects, this utility model can not only meet the defocus stimulation needs of different myopic patients or different retinal areas of the same myopic patient, but also improve the compliance of myopic patients.

[0033] Figure 1 A schematic diagram of the structure of an ophthalmic lens according to an embodiment of the present invention is shown.

[0034] See Figure 1Ophthalmic lenses include a central region 1, multiple primary refractive regions 2, and multiple secondary refractive regions 3.

[0035] The central region 1 can be designed to be the position where the pupil faces when the user looks straight ahead after wearing the glasses. It has a prescription refractive power based on the user's eye prescription, so that after correction by the central region 1, the image is precisely focused on the fovea centralis, ensuring clear vision. The prescription refractive power is the refractive power in the prescription given by the optometry institution, which can be understood as the conventional power (diopter). This invention does not limit the shape and size of the central region 1. For example, the central region can be a circular area with the center of the lens as the center point, and the diameter of the central region can be selected from 3.0 mm to 11.0 mm.

[0036] Multiple first refractive regions 2 and multiple second refractive regions 3 are all located on the periphery of the central region 1, and the multiple first refractive regions 1 are closer to the central region 1 than the multiple second refractive regions 2.

[0037] Figure 1 The illustration shows an example of multiple first refractive regions 2 and multiple second refractive regions 3 distributed on different rings. It should be understood that the first refractive regions 2 and second refractive regions 3 may not be distributed on the rings; for example, they may be distributed only on one side of the central region 5, such as the upper, lower, left, or right side in the figure, or they may be a portion surrounding the central region 5. They can be arranged symmetrically or asymmetrically with respect to the central region 5. The specific distribution can be adjusted according to the wearer's visual acuity. For example, the multiple first refractive regions 2 and multiple second refractive regions 3 can be radially distributed along the radial direction.

[0038] also, Figure 1 This diagram only shows a scenario where multiple second refractive regions 3 are distributed across two rings. It should be understood that multiple second refractive regions 3 can also be distributed across a greater or lesser number of rings. Furthermore, when multiple second refractive regions 3 are distributed across multiple rings, the spacing between the second refractive regions 3 on the rings can increase from the innermost to the outermost rings.

[0039] The spacing between multiple first refractive regions 2 is smaller than the spacing between multiple second refractive regions 3. Spacing is used to measure the density of the first refractive regions 2 and the second refractive regions 3. Alternatively, density or other terms can be used to measure the density of the first refractive regions 2 and the second refractive regions 3. For example, the density of the first refractive region 2 can be greater than the density of the second refractive region 3. The density of refractive regions refers to the number of refractive regions per unit area. Typically, each refractive region is relatively small, and the size difference between different refractive regions is not significant; therefore, density can be used to describe the density of the first refractive regions 2 and the second refractive regions 3.

[0040] It should be understood that the shapes, spacing, and other dimensions of the various regions of the ophthalmic lens discussed in this invention refer to the shapes and dimensions of their planar projections on the ophthalmic lens, or, for example, on the front view of the ophthalmic lens shown in the accompanying drawings. In this invention, because the radius of curvature of the ophthalmic lens surface is much larger than the dimensions of each refractive region, the local areas where the refractive regions are arranged can be considered substantially flat. Therefore, the projections of the refractive regions on the ophthalmic lens described in this invention can be considered as their projections on the front view of the ophthalmic lens. In some embodiments, the first refractive region 2 and the second refractive region 3 can be arranged on the outer surface of the ophthalmic lens (i.e., the surface away from the eye), and the front view of the ophthalmic lens shown in the accompanying drawings is a planar projection of this outer surface. In other embodiments, the first refractive region 2 and the second refractive region 3 can be arranged on the inner surface of the ophthalmic lens (i.e., the surface closer to the eye), and the front view of the ophthalmic lens shown in the accompanying drawings is a planar projection of this inner surface.

[0041] Each of at least a portion of the first refractive region 2 and / or at least a portion of the second refractive region 2 is configured to have multiple additional focal powers that differ from the prescription refractive power and have a positive additional focal power relative to the prescription refractive power. For example, each of all the first refractive regions 2 and the second refractive region 3 can be configured to have multiple myopic defocus points. By configuring a single refractive region to have multiple myopic defocus points, the same refractive region can form peripheral myopic defocus at multiple different distances in front of the wearer's retina, thereby meeting the defocus stimulation needs of different patients or different retinal regions of the same patient.

[0042] like Figure 1 As shown in the top right view, a single refractive region can be configured to produce multiple consecutive myopic defocuses, or it can be configured to produce multiple discrete myopic defocuses. Effectively, configuring a single refractive region to produce multiple consecutive myopic defocuses is superior to configuring it to produce multiple discrete myopic defocuses. However, considering that a coating is typically applied to the lens surface during manufacturing, configuring a single refractive region to produce multiple discrete myopic defocuses will, under the coating's coverage, render these discrete myopic defocuses as consecutive myopic defocuses. Therefore, configuring a single refractive region to produce multiple discrete myopic defocuses is ultimately equivalent to producing consecutive myopic defocuses.

[0043] To ensure the rationality of the design of multiple myopic defocus points in the refractive region, the additional focal power can be selected from a range of values. This range characterizes the range of additional focal power sensitivity, statistically determined, that different users and / or different retinal regions of the same user can suppress axial elongation in response to peripheral myopic defocus signals. For example, the additional focal power range is +2.00D to +5.00D. When multiple myopic defocus points are designed rationally, a wider variety of defocus needs will be covered, and the product will have a broader applicability. For instance, one or two products could be used to achieve good myopia control for over 95% of the population, significantly improving the overall efficiency of myopia control in society.

[0044] The following example illustrates how to make a single refractive area have multiple myopic defocus points.

[0045] In some embodiments, a single microlens can be used to form multiple consecutive myopic defocus points, so that a single refractive region has multiple consecutive myopic defocus points. The microlens can be, but is not limited to, an axial pyramidal lens or a microlens with a continuously varying radius of curvature.

[0046] Figure 2 A schematic diagram of the structure of an ophthalmic lens according to another embodiment of the present invention is shown.

[0047] like Figure 2 As shown, the Bessel beam produced by an axial pyramid has a certain depth of focus, allowing multiple consecutive myopic defocus points to be formed. That is, at least one refractive region in at least a portion of the first refractive region and / or at least a portion of the second refractive region can be equipped with an axial pyramid lens, which provides multiple consecutive additional focal powers corresponding to its depth of focus range. An axial pyramid lens can also be called a Bessel axial pyramid lens or a Bessel lens.

[0048] Figure 3 A schematic diagram of the structure of an ophthalmic lens according to another embodiment of the present invention is shown.

[0049] like Figure 3 As shown, multiple consecutive myopic defocus points can be formed using microlenses with continuously varying radii of curvature (e.g., gradually changing from the center to the periphery). That is, at least one refractive region in at least a portion of the first refractive region and / or at least a portion of the second refractive region can be provided with a microlens whose radius of curvature gradually changes from the center to the periphery.

[0050] In some embodiments, a microlens assembly can be used to form multiple discrete myopic defocus points, so that a single refractive region has multiple discrete myopic defocus points. The microlens assembly includes a predetermined number of microlens regions. Each microlens region can be considered a microlens component. Each microlens region is used to provide a positive additional focal power, and different microlens regions within the same microlens assembly provide different additional focal powers. The radius of curvature of different microlens regions within the same microlens assembly can decrease in a stepwise manner from the inside out, or it can increase in a stepwise manner. Thus, at least one refractive region, at least a portion of the first refractive region and / or at least a portion of the second refractive region, can be provided with a microlens assembly.

[0051] The following is an illustrative example of the specific structure of the microlens assembly.

[0052] Figure 4 A schematic diagram of the structure of an ophthalmic lens according to another embodiment of the present invention is shown.

[0053] like Figure 4 As shown, a microlens assembly can be formed by stacking multiple microlenses with different radii of curvature in concentric rings, each region corresponding to a microlens region. More specifically, the central region of the microlens assembly and each concentric ring region surrounding the central region each correspond to a microlens region.

[0054] Figure 5 A schematic diagram of the structure of an ophthalmic lens according to another embodiment of the present invention is shown.

[0055] like Figure 5 As shown, the microlens assembly can be a multifocal Fresnel lens with a diffraction ring structure, where each diffraction ring structure in the multifocal Fresnel lens corresponds to a microlens region.

[0056] Figure 6 A schematic diagram of the structure of an ophthalmic lens according to another embodiment of the present invention is shown.

[0057] like Figure 6 As shown, a microlens assembly may include multiple annular lenses arranged in a concentric ring configuration, with a predetermined interval between adjacent annular lenses. Each annular lens corresponds to a microlens region. The predetermined interval can be zero or a non-zero value. This type of microlens assembly can also be referred to as a microlens with a defocus ring structure.

[0058] Based on the above-mentioned ophthalmic lens, this utility model also proposes a pair of glasses (framed glasses) for preventing myopia or delaying the development of myopia, wherein the glasses are provided with the ophthalmic lens described above.

[0059] The ophthalmic lenses and eyeglasses according to this utility model have been described in detail above with reference to the accompanying drawings.

[0060] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An ophthalmic lens, characterized in that, It includes a central region, multiple first refractive regions, and multiple second refractive regions, wherein the central region has a prescription refractive power based on a prescription for the human eye. The plurality of first refractive regions are closer to the central region than the plurality of second refractive regions. The spacing between the plurality of first refractive regions is smaller than the spacing between the plurality of second refractive regions. Each of the refractive regions in at least a portion of the first refractive region and / or at least a portion of the second refractive region is configured to have a plurality of refractive powers that are different from the prescription refractive power and have a positive additional focal power relative to the prescription refractive power.

2. The ophthalmic lens according to claim 1, characterized in that, The additional focal length is selected from the range of additional focal length values. The range of additional focal length values ​​is used to characterize the range of additional focal length sensitivity that, based on statistical determination, different users and / or different retinal regions of the same user can suppress axial elongation in response to peripheral myopic defocus signals.

3. The ophthalmic lens according to claim 2, characterized in that, The additional focal length ranges from +2.00D to +5.00D.

4. The ophthalmic lens according to claim 1, characterized in that, At least one of the at least partial first refractive region and / or at least partial second refractive region is provided with an axial pyramidal lens, the axial pyramidal lens being used to provide a plurality of consecutive additional focal powers corresponding to its depth of focus range.

5. The ophthalmic lens according to claim 1, characterized in that, At least one of the at least partial first refractive region and / or at least partial second refractive region is provided with a microlens assembly, the microlens assembly comprising a predetermined number of microlens regions, each of the microlens regions being used to provide a positive additional focal power, and different microlens regions in the same microlens assembly providing different additional focal powers.

6. The ophthalmic lens according to claim 5, characterized in that, The microlens assembly is composed of multiple microlenses with different radii of curvature stacked in concentric rings, with the central region of the microlens assembly and each concentric ring region surrounding the central region corresponding to a microlens region.

7. The ophthalmic lens according to claim 5, characterized in that, The microlens assembly is a multifocal Fresnel lens with a diffraction ring structure, and each diffraction ring structure in the multifocal Fresnel lens corresponds to one of the microlens regions.

8. The ophthalmic lens according to claim 5, characterized in that, The microlens assembly includes a plurality of annular lenses arranged in a concentric ring configuration, with a predetermined interval between adjacent annular lenses, and each annular lens corresponds to one of the microlens regions.

9. The ophthalmic lens according to any one of claims 5 to 8, characterized in that, Within the same microlens assembly, the radius of curvature of different microlens regions decreases in a step-like manner from the inside to the outside; or Within the same microlens assembly, the radius of curvature of different microlens regions increases in a stepwise manner from the inside to the outside.

10. A pair of eyeglasses, characterized in that, The ophthalmic lens included in any one of claims 1 to 9.

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