Ophthalmic lens and eyeglasses

Abstract

The present disclosure relates to an ophthalmic lens and eyeglasses. 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] The present invention relates to the field of ophthalmic optometry, and in particular to an ophthalmic lens and glasses. Background Art

[0002] The myopia problem faced by children and adolescents has become one of the important social problems. At present, the myopia rate among children and adolescents is as high as 52.7%. At the same time, there is a trend of myopia at a younger age, and the proportion of high myopia remains high. In 2021, the "Report on Myopia Prevention and Control of Children and Adolescents in the Information Age" released by Professor Li Ling showed that in the future, there will be at least 960 million myopic people in the total population of China. Myopia has become the disease that most affects the visual health of children and adolescents.

[0003] The health of children and adolescents is related to the country's strategic development, and myopia control is urgent. With the increasing severity of myopia and the rapid development of science and technology, technical means are constantly being supplemented and upgraded. Clinically, it is necessary to comprehensively consider the individual's own conditions and provide children and adolescents with scientific and personalized myopia control plans.

[0004] Commonly used myopia control products include orthokeratology lenses, defocused soft lenses, defocused RGP, defocused frame glasses, low-concentration atropine, etc. Among them, specially designed defocused frame glasses have become one of the main choices for clinical myopia control technology due to their advantages such as easy wearing and few adverse reactions. In recent years, the research progress on myopia control mechanism has provided new ideas for the design of specially designed frame glasses.

[0005] The central area of ​​the multi-point myopic defocus design frame lens has a clear single-focus optical zone, which allows a part of the fundus image to be focused on the retina. At the same time, according to the principle of "optical myopic defocus", closely arranged microlenses are used in the periphery of the lens to produce peripheral retinal myopic defocus, so that another part of the image is focused in front of the retina. The brain will selectively use the image "on the retina" to "see" the object clearly, and use the image "in front of the retina" to "control the progression of myopia", thereby achieving the purpose of inhibiting the elongation of the eye axis and delaying the increase of myopia.

[0006] The number of microstructured eyeglasses designed based on the principle of "optical myopia defocus" is increasing in the market. The optical designs of the products are diverse, and the myopia control effects vary. According to research, different people and different areas of the retina respond very differently to the optical defocus signals of myopia control products. This means that even if the myopia control products based on the principle of optical myopia defocus are excellent, at least 20% of the population will not respond at all, and the expected control effect cannot be achieved.

[0007] In addition, there is also a demand for myopia prevention and control lenses that can improve patient compliance. Summary of the invention

[0008] A technical problem to be solved by the present disclosure 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 can improve the patient's wearing compliance.

[0009] According to a first aspect of the present disclosure, an ophthalmic lens is provided, comprising a central area, a plurality of first refractive areas, and a plurality of second refractive areas, wherein the central area has a prescription refractive power based on a prescription of a human eye, the plurality of first refractive areas are closer to the central area than the plurality of second refractive areas, the spacing between the plurality of first refractive areas is smaller than the spacing between the plurality of second refractive areas, and each refractive area of ​​at least some of the first refractive areas and / or at least some of the second refractive areas 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.

[0010] Optionally, at least one of the at least part of the first refraction area and / or the at least part of the second refraction area is provided with an axicon lens, and the axicon lens is used to provide a plurality of continuous additional focal powers corresponding to its focal depth range.

[0011] Optionally, the additional focal power is selected from an additional focal power value range, and the additional focal power value range is used to characterize the additional focal power sensitivity range corresponding to the ability of different users and / or different retinal areas of the same user to suppress axial growth in response to peripheral myopic defocus signals based on statistical determination.

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

[0013] Optionally, at least one of the at least part of the first refractive area and / or at least part of the second refractive area is provided with a microlens combination, the microlens combination includes a predetermined number of microlens areas, each of the microlens areas is used to provide a positive additional focal power, and different microlens areas in the same microlens combination provide different additional focal powers.

[0014] Optionally, the microlens combination is formed by stacking a plurality of microlenses with different curvature radii in the form of concentric rings in different regions, and the middle region of the microlens combination and each concentric ring region surrounding the middle region respectively correspond to one microlens region.

[0015] Optionally, the microlens combination 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.

[0016] Optionally, the microlens combination includes a plurality of annular lenses arranged in the form of concentric rings, with a predetermined interval between adjacent annular lenses, and each of the annular lenses corresponds to one of the microlens areas.

[0017] Optionally, the curvature radii of different microlens regions in the same microlens combination decrease in a step-like manner from inside to outside; or the curvature radii of different microlens regions in the same microlens combination increase in a step-like manner from inside to outside.

[0018] According to a second aspect of the present disclosure, a pair of glasses for preventing myopia or delaying the progression of myopia is provided, comprising the lens described in the first aspect above.

[0019] Therefore, the present invention configures a single myopia defocus area (first refractive area, second refractive area) to have multiple myopia defocus focal points, and sets a higher density of myopia defocus areas (i.e., the first refractive area) in an area relatively closer to the central optical zone (i.e., the center area) of the lens (such as near the central optical zone), and sets a lower density of myopia defocus areas (i.e., the second refractive area) in an area relatively farther from the central optical zone, so that the compliance of myopia patients can be improved while meeting the defocus stimulation needs of different myopia patients or different retinal areas of the same myopia patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components in the exemplary embodiments of the present disclosure.

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

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

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

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

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

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

[0027] The meanings of the numbers in the accompanying drawings are: 1. central area; 2. first refractive area; 3. second refractive area. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0029] Those skilled in the art should understand that the terms "first", "second", etc. in the present disclosure are used to distinguish similar objects, rather than to describe a specific order or sequence, and have no additional limiting effect.

[0030] The present disclosure proposes to configure a single myopic defocus area (i.e., the first refractive area and the second refractive area described below) to have multiple myopic defocus points. In this way, when the wearer wears glasses made of the lens, multiple defocus signals at different positions will be formed in front of the wearer's retina, thereby meeting the defocus stimulation needs of different patients or different retinal areas of the same patient. When the combination and design of multiple myopic defocus points are reasonable, the product has a wider range of applicable people.

[0031] At the same time, the present disclosure also proposes to set a higher density of myopia defocus areas (i.e., first refractive areas) in an area relatively closer to the central optical zone (i.e., center area) of the lens (e.g., near the central optical zone), and set a lower density of myopia defocus areas (i.e., second refractive areas) in an area relatively farther from the central optical zone. In this way, better myopia control effects can be achieved while improving the compliance of myopic patients.

[0032] Therefore, the present disclosure adopts the above two settings, so that while meeting the defocus stimulation needs of different myopic patients or different retinal areas of the same myopic patient, it can also improve the compliance of myopic patients.

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

[0034] See also Figure 1 The ophthalmic lens comprises a central area 1, a plurality of first refractive areas 2 and a plurality of second refractive areas 3.

[0035] The central area 1 can be designed to be the position where the pupil is facing when the user looks straight ahead after wearing the glasses. It has a prescription refractive power based on the prescription of the human eye (the user's eye). In this way, after correction by the central area 1, the image is exactly on the fovea centralis to ensure clear vision. The prescription refractive power is the refractive power in the prescription prescribed by the vision optometry agency, which can be understood as the conventional degree. The present disclosure does not limit the shape and size of the central area 1. Exemplarily, the central area can be a circular area with the center of the lens as the dot, and the diameter of the central area can be selected from 3.0 mm to 11.0 mm.

[0036] The plurality of first refraction areas 2 and the plurality of second refraction areas 3 are both arranged at the periphery of the central area 1 , and the plurality of first refraction areas 1 are closer to the central area 1 than the plurality of second refraction areas 2 .

[0037] Figure 1 The example shown is when a plurality of first refraction areas 2 and a plurality of second refraction areas 3 are distributed on different rings. It should be known that the first refraction areas 2 and the second refraction areas 3 may not be distributed on the ring, for example, they may be distributed only on one side of the central area 5, such as the upper side, the lower side, the left side or the right side in the figure, or may be a partial area around the periphery of the central area 5. They may be arranged symmetrically or asymmetrically about the central area 5. As for the specific distribution, it can be adjusted accordingly according to the vision of the wearer. Exemplarily, the plurality of first refraction areas 2 and the plurality of second refraction areas 3 may be distributed radially along the radial direction.

[0038] also, Figure 1 Only a schematic diagram is shown when the plurality of second refraction areas 3 are distributed on two rings. It should be known that the plurality of second refraction areas 3 can also be distributed on a greater number or a smaller number of rings. Furthermore, when the plurality of second refraction areas 3 are distributed on a plurality of rings, the spacing between the second refraction areas 3 on the rings from the inner to the outer can be increased.

[0039] The spacing between the plurality of first refraction areas 2 is smaller than the spacing between the plurality of second refraction areas 3. The spacing is used to measure the density of the first refraction areas 2 and the second refraction areas 3. In addition, the density of the first refraction areas 2 and the second refraction areas 3 may also be measured by density or other expressions. For example, the density of the first refraction areas 2 may be greater than the density of the second refraction areas 3. The density of the refraction areas refers to the number of refraction areas per unit area. Usually, the size of each refraction area is small, and the sizes of different refraction areas are not very different, so the density may be used to describe the density of the first refraction areas 2 and the second refraction areas 3.

[0040] It should be understood that the shapes, spacings, and other dimensions of the various regions of the ophthalmic lens discussed in the present disclosure refer to the shapes and dimensions of the plane projections on the ophthalmic lens or on the main view of the ophthalmic lens, for example, as shown in the accompanying drawings. In the present disclosure, because the radius of curvature of the surface of the ophthalmic lens is much larger than the size of each refractive region, the local area where each refractive region is arranged can be regarded as being substantially flat, so that the projections of each refractive region described in the present disclosure on the ophthalmic lens can be regarded as their projections on the main 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 main view of the ophthalmic lens as shown in the accompanying drawings is a plane projection of the 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 close to the eye), and the main view of the ophthalmic lens as shown in the accompanying drawings is a plane projection of the inner surface.

[0041] Each refractive area in at least part of the first refractive area 2 and / or at least part of the second refractive area 2 is configured to have a plurality of refractive powers that are different from the prescribed refractive power and have a positive additional focal power relative to the prescribed refractive power. Exemplarily, each refractive area in all the first refractive areas 2 and the second refractive areas 3 can be configured to have a plurality of myopic defocus focal points. By configuring a single refractive area to have a plurality of myopic defocus focal points, the same refractive area can form peripheral myopic defocus at a plurality of different distances in front of the retina of the wearer's eye, thereby meeting the defocus stimulation requirements of different patients or different retinal areas of the same patient.

[0042] like Figure 1 As shown in the upper right view, a single refractive area can be configured to produce multiple continuous myopic defocus focuses, or a single refractive area can be configured to produce multiple discrete myopic defocus focuses. In terms of effect, configuring a single refractive area to produce multiple continuous myopic defocus focuses is better than configuring a single refractive area to produce multiple discrete myopic defocus focuses. However, considering that a coating is usually performed on the surface of the lens when the lens is manufactured, configuring a single refractive area to produce multiple discrete myopic defocus focuses, these multiple discrete myopic defocus focuses will also become continuous myopic defocus focuses under the covering effect of the film. Therefore, configuring a single refractive area to produce multiple discrete myopic defocus focuses is equivalent to a continuous myopic defocus focus in the final effect.

[0043] In order to ensure the rationality of the design of multiple myopic defocus points in the refractive area, the additional focal power can be selected from the additional focal power value range. The additional focal power value range is used to characterize the additional focal power sensitivity range corresponding to the ability of different retinal areas of different users and / or the same user to suppress axial growth in response to peripheral myopic defocus signals based on statistics. Exemplarily, the additional focal power value range is +2.00D to +5.00D. When the design of multiple myopic defocus points is reasonable, more different defocus needs will be covered, and the product will have a wider range of applicable people. For example, one or two products can be used to enable more than 95% of the population to obtain good myopia control effects, which will greatly improve the overall myopia control efficiency of society.

[0044] The following is an exemplary description of how to make a single refractive area have multiple myopic defocus focal points.

[0045] In some embodiments, a single microlens may be used to form multiple continuous myopic defocused focal points, so that a single refractive area has multiple continuous myopic defocused focal points. The microlens may be, but is not limited to, an axicon lens or a microlens with a continuously changing radius of curvature.

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

[0047] like Figure 2 As shown, the Bessel beam generated by the axicon has a certain focal depth, and the axicon can be used to form multiple continuous myopic defocused focal points. That is, at least one of at least part of the first refractive area and / or at least part of the second refractive area can be provided with an axicon lens, and the axicon lens is used to provide multiple continuous additional focal powers corresponding to its focal depth range. The axicon lens can also be called a Bessel axicon lens or a Bessel lens.

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

[0049] like Figure 3 As shown, a plurality of continuous myopic defocused focal points can be formed by using a microlens with a continuously changing curvature radius (e.g., gradually changing from the center to the periphery). That is, at least one of at least a portion of the first refractive area and / or at least a portion of the second refractive area can be provided with a microlens with a curvature radius gradually changing from the center to the periphery.

[0050] In some embodiments, a microlens combination can be used to form multiple discrete myopic defocus focal points so that a single refractive area has multiple discrete myopic defocus focal points. The microlens combination includes a predetermined number of microlens areas. Each microlens area can be regarded as a microlens assembly. Each microlens area is used to provide a positive additional focal power, and different microlens areas in the same microlens combination provide different additional focal powers. The radius of curvature of different microlens areas in the same microlens combination can decrease in steps from the inside to the outside, or can also increase in steps. Thus, at least one refractive area in at least part of the first refractive area and / or at least part of the second refractive area can be provided with a microlens combination.

[0051] The specific structure of the microlens combination is exemplified below.

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

[0053] like Figure 4 As shown, the microlens combination can be formed by stacking a plurality of microlenses with different curvature radii in the form of concentric rings in different regions. Each microlens corresponds to a microlens region. More specifically, the middle region of the microlens combination and each concentric ring region surrounding the middle region respectively correspond to a microlens region.

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

[0055] like Figure 5 As shown, the microlens combination may be a multifocal Fresnel lens with a diffraction ring structure, and each diffraction ring structure in the multifocal Fresnel lens corresponds to a microlens area.

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

[0057] like Figure 6 As shown, the microlens combination may include a plurality of annular lenses arranged in the form of concentric rings, with a predetermined interval between adjacent annular lenses, and each annular lens corresponds to a microlens area. The predetermined interval may be zero or a non-zero value. The microlens combination of this structure may also be referred to as a microlens with a defocus ring structure.

[0058] Based on the above ophthalmic lenses, the present disclosure also proposes a pair of glasses (frame glasses) for preventing myopia or delaying the development of myopia, wherein the glasses are provided with the above ophthalmic lenses.

[0059] The ophthalmic lenses and spectacles according to the present disclosure have been described above in detail with reference to the accompanying drawings.

[0060] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An ophthalmic lens, characterized in that: comprising a central area, a plurality of first refractive areas, and a plurality of second refractive areas, the central area having a prescription refractive power based on a prescription of a human eye, The plurality of first refraction areas are closer to the central area than the plurality of second refraction areas, The spacing between the plurality of first refraction areas is smaller than the spacing between the plurality of second refraction areas. Each of at least part of the first refractive area and / or at least part of the second refractive area is configured to have a plurality of refractive powers different from the prescribed refractive power and having a positive additional power relative to the prescribed refractive power.

2. The ophthalmic lens according to claim 1, characterized in that The additional focal power is selected from the additional focal power value range, The additional focal power value range is used to characterize the additional focal power sensitivity range corresponding to the ability of different users and / or different retinal areas of the same user to suppress axial length growth in response to peripheral myopic defocus signals, which is determined based on statistics.

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

4. The ophthalmic lens according to claim 1, wherein: At least one of the at least part of the first refraction area and / or the at least part of the second refraction area is provided with an axicon lens, and the axicon lens is used to provide a plurality of continuous additional focal powers corresponding to the focal depth range thereof.

5. The ophthalmic lens according to claim 1, characterized in that At least one of the at least part of the first refractive area and / or at least part of the second refractive area is provided with a microlens combination, the microlens combination includes a predetermined number of microlens areas, each of the microlens areas is used to provide a positive additional focal power, and different microlens areas in the same microlens combination provide different additional focal powers.

6. The ophthalmic lens according to claim 5, characterized in that The microlens combination is formed by stacking a plurality of microlenses with different curvature radii in the form of concentric rings in different regions. The middle region of the microlens combination and each concentric ring region surrounding the middle region correspond to one microlens region respectively.

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

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

9. The ophthalmic lens according to any one of claims 5 to 8, characterized in that The curvature radii of different microlens regions in the same microlens combination decrease in a step-like manner from the inside to the outside; or The curvature radii of different microlens areas in the same microlens combination increase stepwise from the inside to the outside.

10. A pair of glasses for preventing myopia or delaying the progression of myopia, characterized in that: An ophthalmic lens comprising any one of claims 1 to 9.

Images