Optical lens

Abstract

The present disclosure describes an optical lens, which includes a central optical zone located at the center of the lens and a peripheral optical zone surrounding the outer periphery of the central optical zone. The central optical zone has a first refractive power. The peripheral optical zone includes a plurality of optical units, and the optical units include a first optical unit, a second optical unit, and a third optical unit. The first optical unit has a first refractive power, the second optical unit has a second refractive power, and the third optical unit has a third refractive power. An object at a first distance from the eye forms an image on the retina via the first optical unit, an object at a second distance from the eye forms an image on the retina via the second optical unit, and an object at a third distance from the eye forms an image on the retina via the third optical unit. The optical lens has a depth of field based on the second distance and the third distance. According to the present disclosure, an optical lens with a wider depth of field, high clarity of seeing objects, and capable of suppressing the further development of myopia can be provided.

Description

Technical Field

[0001] The present invention generally relates to the field of ophthalmic medical devices, and particularly to an optical lens. Background Art

[0002] In clinical ophthalmology, if the light rays emitted by an object point at a certain distance from the human eye are focused on the retina to form a focal point after passing through the eyeball, then the object point can be called the conjugate point of the retina; for two points before and after the position of the conjugate point, a visual target closer to the near point or a visual target farther from the far point cannot be resolved by the retina, so the distance between the near point and the far point can be called the depth of field, and the distance between the two points where images are formed in front of and behind the retina corresponding to the depth of field is the depth of focus. Objects within the depth of field can be imaged within the depth of focus and thus can be resolved by the retina. When the human eye views an object, it generally automatically adjusts the shape and thickness of the lens through the ciliary muscle for focusing. However, the eyes with refractive errors usually have a weakened automatic adjustment function, resulting in a reduced deformability amplitude of the lens, a smaller depth of field, and the ability to see clearly only objects within a certain distance range.

[0003] Traditional glasses usually configure the lens to have a diopter matching the refractive error of the eye for refractive correction. Currently, myopia control lenses that can control myopia have also emerged on the market. Myopia control lenses usually have a correction area with a correction diopter in the center of the lens and a myopic defocus area surrounding the periphery of the correction area. When worn, the light passing through the myopic defocus area can be focused in front of the retina, thereby slowing down the growth of the eye axis and preventing the further progression of myopia.

[0004] However, in existing myopia control lenses, due to a certain difference in diopter between the correction area and the myopic defocus area, the wearer can see clearly only when viewing an object through the correction area in the center of the lens, and may not see clearly when viewing an object through the myopic defocus area surrounding the periphery. Therefore, there is a need for glasses that can provide clear vision and inhibit the further development of myopia. Summary of the Invention

[0005] In view of the above existing situation, the purpose of the present disclosure is to provide an optical lens that can extend the depth of field by designing the lens, so as to obtain clear vision and inhibit the further development of myopia.

[0006] To this end, the present disclosure provides an optical lens, which includes a central optical zone located at the center of the lens and a peripheral optical zone surrounding the outer periphery of the central optical zone. The central optical zone has a first refractive power based on the refractive error of the eyeball. The peripheral optical zone includes a plurality of optical units, and the optical units include a first optical unit, a second optical unit, and a third optical unit. The first optical unit has the first refractive power, the second optical unit has a second refractive power greater than the first refractive power, and the third optical unit has a third refractive power less than the first refractive power. When wearing the optical lens to view an object, an object at a first distance from the eyeball forms an image on the retina via the first optical unit, an object at a second distance from the eyeball forms an image on the retina via the second optical unit, and an object at a third distance from the eyeball forms an image on the retina via the third optical unit. The optical lens has a depth of field based on the second distance and the third distance.

[0007] In the present disclosure, the optical lens has a central optical zone located at the center of the lens and a peripheral optical zone surrounding the outer periphery of the central optical zone. The peripheral optical zone includes a first optical unit with a first refractive power, a second optical unit with a second refractive power, and a third optical unit with a third refractive power. In one optical unit, there are simultaneously a correction area with the first refractive power, a myopic defocus area with the second refractive power, and a hyperopic defocus area with the third refractive power, so that the optical lens has a depth of field between the far point at the second distance and the near point based on the third distance; compared with the existing peripheral defocus lenses, the depth of field range of the optical lens of the present disclosure is wider. When viewing an object through the optical lens, the user's brain can adaptively select an appropriate focal length from a wider range of the depth of focus area, so that the user's ciliary muscle does not need to exert excessive force, reducing the situation of long-term tight contraction of the ciliary muscle, thereby effectively relieving eye pressure to inhibit the further growth of myopia; in addition, when the user views an object through the peripheral optical zone, the user can view the object through the first optical unit, the second optical unit, and the third optical unit at the same time. The first optical unit with the first refractive power can improve the clarity of viewing, and the second optical unit and the third optical unit can cooperate to form a wider depth of field; when the user looks straight at the center of the optical lens to view an object, the light incident from the peripheral optical zone can also cooperate to form a wider depth of field while improving the clarity of viewing to inhibit the further growth of myopia. Thus, an optical lens with high viewing clarity and capable of inhibiting the further development of myopia can be obtained by designing the lens to extend the depth of field.

[0008] In addition, in the optical lens involved in the present disclosure, optionally, in the circumferential and radial directions of the optical lens, the first optical unit, the second optical unit, and the third optical unit are arranged in a sequential cycle. In this case, the regions where each optical unit is adjacent in the circumferential and radial directions are other optical units with different diopters, which can facilitate the user to view objects through the three optical units simultaneously. While enabling clear vision, it can provide a relatively wide depth of field to play a role in inhibiting the further development of myopia; moreover, by alternately arranging the first optical unit, the second optical unit, and the third optical unit, it is also beneficial to form high-order aberrations, thereby further increasing the depth of field of the optical lens to better achieve the effect of controlling myopia.

[0009] In addition, in the optical lens involved in the present disclosure, optionally, in any two adjacent units of the first optical unit, the second optical unit, and the third optical unit, the two are in close contact with each other. In this case, the three optical units are in close contact, which can facilitate the user to view objects through the three optical units simultaneously, thereby being beneficial to clear vision and controlling myopia.

[0010] In addition, in the optical lens involved in the present disclosure, optionally, when projected along the direction perpendicular to the center of the optical lens, the first optical unit, the second optical unit, and the third optical unit are generally rectangular in shape. In this case, it is convenient for the first optical unit, the second optical unit, and the third optical unit to be in close contact with each other.

[0011] In addition, in the optical lens involved in the present disclosure, optionally, the peripheral optical zone can be divided into a plurality of optical unit groups connected in sequence along the circumferential direction of the lens. The plurality of optical unit groups include a plurality of first optical unit groups, a plurality of second optical unit groups, and a plurality of third optical unit groups. Among them, each first optical unit group includes a plurality of the first optical units spirally distributed from the inner circumference to the outer circumference of the peripheral optical zone, and adjacent first optical units share endpoints; and / or each second optical unit group includes a plurality of the second optical units spirally distributed from the inner circumference to the outer circumference of the peripheral optical zone, and adjacent second optical units share endpoints; and / or each third optical unit group includes a plurality of third optical units spirally distributed from the inner circumference to the outer circumference of the peripheral optical zone, and adjacent third optical units share endpoints. In this case, by configuring each optical unit to be spirally distributed, the plurality of first optical units, the plurality of second optical units, and the plurality of third optical units can be evenly distributed, thereby facilitating the user to view objects through the three optical units simultaneously, and effectively inhibiting the further development of myopia while achieving clear vision.

[0012] In addition, in the optical lens involved in the present disclosure, optionally, each line segment extending from the inner edge to the outer edge of the peripheral optical zone in the radial direction of the optical lens defines the boundary of each of the optical units. Thus, it is possible to facilitate the close fitting of each optical unit.

[0013] In addition, in the optical lens involved in the present disclosure, optionally, the peripheral optical zone can be divided into a plurality of sector-shaped optical units connected in sequence along the circumferential direction of the optical lens. Each of the sector-shaped optical units includes the first optical unit and the second optical unit, or the first optical unit and the third optical unit, which are arranged alternately in the radial direction. Among them, at the same radial position of the optical lens, adjacent sector-shaped optical units are arranged with units having different refractive powers. Thus, it is possible to facilitate the user to view objects through three optical units simultaneously.

[0014] In addition, in the optical lens involved in the present disclosure, optionally, the central angle of the optical unit is 5° to 20°. In this case, it is possible to make the size of the optical unit match the size of an ordinary human eye, so that when the user views an object through the peripheral optical zone, the user can view the object through three optical units simultaneously.

[0015] In addition, in the optical lens involved in the present disclosure, optionally, the size of the optical unit in the radial direction of the optical lens is 0.5 mm to 4 mm. In this case, it is possible to make the size of the optical unit match the size of an ordinary human eye, so that when the user views an object through the peripheral optical zone, the user can view the object through three optical units simultaneously.

[0016] In addition, in the optical lens involved in the present disclosure, optionally, the diameter of the central optical zone is 8 mm to 12 mm. In this case, it is possible to make the central optical zone match the size of an ordinary human eye. When the user views an object straight ahead at the center of the glasses, most of the light emitted by the target object can enter through the central optical zone, which is beneficial for clear vision.

[0017] In addition, in the optical lens involved in the present disclosure, optionally, on the front surface and / or the rear surface of the optical lens, the area of the peripheral optical zone accounts for 20% to 80% of the area of the optical lens. In this case, it is possible to effectively extend the depth of field of the lens to control myopia.

[0018] In addition, in the optical lens involved in the present disclosure, optionally, the second refractive power is greater than the first refractive power by 0.25 D to 10 D, and the third refractive power is less than the first refractive power by 0.25 D to 10 D. In this case, a depth-of-field range of at least ±0.25 D can be obtained based on the first refractive power. In addition, selecting the difference between the second refractive power and the third refractive power according to the actual situation can be adapted to the target human eye.

[0019] In addition, in the optical lens involved in the present disclosure, optionally, it further includes a peripheral edge area surrounding the outer periphery of the peripheral optical area, and the peripheral edge area has the first refractive power. In this case, the light incident through the peripheral edge area can be imaged on the retina, which is beneficial to clear vision. Moreover, when the optical lens is applied to frame glasses, the optical lens can be assembled on the frame by fixing the peripheral edge area.

[0020] According to the present disclosure, an optical lens with high visual clarity and a relatively wide depth of field, which can inhibit the further development of myopia, can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram showing an optical lens involved in an example of the present disclosure.

[0022] Figure 2 is a schematic diagram showing Figure 1 a cross-sectional view of the optical lens shown.

[0023] Figure 3 is a schematic diagram showing the depth of field.

[0024] Figure 4 is a schematic diagram showing the depth of field of the optical lens involved in an example of the present disclosure.

[0025] Figure 5 is a schematic diagram showing a second embodiment of the optical lens involved in an example of the present disclosure.

[0026] Figure 6 is a schematic diagram showing Figure 5 an optical unit group of the optical lens shown.

[0027] Figure 7 is a schematic diagram showing Figure 5 an application scenario diagram of the optical lens shown.

[0028] Figure 8 is a schematic diagram showing a third embodiment of the optical lens involved in an example of the present disclosure.

[0029] Figure 9 is a schematic diagram showing Figure 8 a fan-shaped optical unit of the optical lens shown.

[0030] Description of Reference Numerals

[0031] 100... optical lens, 10... central optical region, 20... peripheral optical region, 30... outer peripheral region, 21... optical unit, 211... first optical unit, 212... second optical unit, 213... third optical unit, 22... sector-shaped optical unit, 23... optical unit group, 231... first optical unit group, 232... second optical unit group, 233... third optical unit group, 200... eyeball, 300... single diopter lens. Detailed Description of the Embodiment

[0032] All references cited in this disclosure are incorporated herein by reference in their entirety as if fully set forth. Unless otherwise defined, the technical and scientific terms used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains.

[0033] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, the same reference numerals are given to the same components, and redundant descriptions are omitted. In addition, the drawings are only schematic diagrams, and the proportional relationship of the sizes between components or the shapes of components, etc. may be different from the actual ones.

[0034] It should be noted that the terms "comprising" and "having" in this disclosure and any variations thereof, for example, the processes, methods, systems, products, or apparatuses including or having a series of steps or units, do not necessarily have to be limited to those steps or units clearly listed, but may include or have other steps or units that are not clearly listed or are inherent to these processes, methods, products, or apparatuses.

[0035] The present disclosure relates to an optical lens that can be used for refractive correction. When a user views an object through the optical lens of the present disclosure, the clarity of vision is high, and the further development of myopia can be suppressed. The optical lens of the present disclosure can be simply referred to as a lens, and can also be called an eyeglass lens, a myopia control lens, a depth-of-field lens, etc. The optical lens of the present disclosure can be used for frame glasses or can be an intraocular lens.

[0036] Hereinafter, the optical lens according to this embodiment will be described in detail with reference to the accompanying drawings.

[0037] Figure 1 It is a schematic diagram showing the optical lens 100 according to an example of the present disclosure. Figure 2 It shows Figure 1 A cross-sectional schematic diagram of the optical lens 100 shown. Among them, Figure 2 It is Figure 1 A cross-sectional schematic diagram of the optical lens 100 shown along line AQ.

[0038] In this embodiment, the optical lens 100 may include a central optical zone 10 located at the center of the lens, and a peripheral optical zone 20 surrounding the outer periphery of the central optical zone 10 (see Figure 1 ). Among them, the central optical zone 10 may have a first refractive power based on the refractive error of the eyeball 200. Thus, the optical lens 100 can be used for refractive correction.

[0039] In some examples, the peripheral optical zone 20 may include a plurality of optical units 21 (see Figure 1 ). Among them, the optical unit 21 may have a first optical unit 211, a second optical unit 212, and a third optical unit 213 (see Figure 1 and Figure 2 ). The first optical unit 211 may have a first refractive power, the second optical unit 212 may have a second refractive power greater than the first refractive power, and the third optical unit 213 may have a third refractive power less than the first refractive power. When wearing the optical lens 100 to view an object, an object at a first distance from the eyeball 200 forms an image on the retina through the first optical unit 211, an object at a second distance from the eyeball 200 forms an image on the retina through the second optical unit 212, and an object at a third distance from the eyeball 200 forms an image on the retina through the third optical unit 213. The optical lens 100 has a depth of field based on the second distance and the third distance. In this case, within one optical unit 21, there are simultaneously a correction area with the first refractive power, a myopic defocus area with the second refractive power, and a hyperopic defocus area with the third refractive power, so that the optical lens 100 has a depth of field between the far point at the second distance and the near point based on the third distance (described later in conjunction with the drawings); compared with the existing peripheral defocus type lenses, the depth of field range of the optical lens 100 of the present disclosure is wider. When viewing an object through the optical lens 100, the user's brain can adaptively select a suitable focal length from a wider range of the depth of field area, so that the user's ciliary muscle does not need to exert excessive force, reducing the situation of the ciliary muscle being tense and contracted for a long time, thereby effectively relieving eye pressure to inhibit the further growth of myopia.

[0040] In this embodiment, when the user views an object through the peripheral optical zone 20 of the optical lens 100 of the present disclosure, the user can view the object through the first optical unit 211, the second optical unit 212, and the third optical unit 213 at the same time. The first optical unit 211 with a first refractive power can improve the clarity of viewing the object, and the second optical unit 212 and the third optical unit 213 can cooperate to form a relatively wide depth of field. Moreover, when the user views the object straight at the center of the optical lens 100, the light rays incident from the peripheral optical zone 20 can also cooperate to form a relatively wide depth of field while improving the clarity of viewing the object, so as to inhibit the further progression of myopia. Thus, an optical lens 100 with high viewing clarity and the ability to inhibit the further development of myopia can be obtained by designing the lens to extend the depth of field.

[0041] Figure 3 FIG. is a schematic diagram showing the depth of field. Figure 4 FIG. is a schematic diagram showing the depth of field of the optical lens 100 involved in the example of the present disclosure.

[0042] As Figure 3 shown, taking the lens 300 with only a single diopter as an example, the light rays incident from point P are imaged on the retina (i.e., P'), and the points A (far point) and B (near point) within a certain range before and after point P are imaged as points A' and B'. The visual targets closer to point B or farther from point A cannot be resolved by the retina. Then, the distance between points A and B schematically represents the depth of field of the lens, and the distance between points A' and B' schematically represents the focal depth of the lens.

[0043] In Figure 4 , for the purpose of more clearly showing the depth of field of the optical lens 100 of the present disclosure, an optical lens 100 in which only one type of optical unit 21 exists in the radial direction from the center of the lens outward is taken as an example for description, which should not be construed as restrictive. In addition, the proportion is appropriately enlarged.

[0044] As Figure 4As shown in the figure, the light incident from point P passes through the central optical zone 10 in the center of the lens and the first optical unit 211 of the peripheral optical zone 20 and forms an image on the retina (i.e., P'), the light incident from point C passes through the second optical unit 212 of the peripheral optical zone 20 and forms an image on the retina (i.e., P'), and the light incident from point D passes through the third optical unit 213 of the peripheral optical zone 20 and forms an image on the retina (i.e., point P'); the far point of point C is point C1, and the light incident from point C1 passes through the central optical zone 10 in the center of the lens and the first optical unit 211 of the peripheral optical zone 20 and forms an image in front of the retina (i.e., point C1'); the near point of point D is point D1, and the light incident from point D1 passes through the central optical zone 10 in the center of the lens and the first optical unit 211 of the peripheral optical zone 20 and forms an image in front of the retina (i.e., point D1'); the distance between points C1 and D1 schematically represents the depth of field of the optical lens 100, and the distance between the corresponding points C1' and D1' schematically represents the focal depth. Thus, compared with the existing single diopter and peripheral defocus lenses, the optical lens 100 of the present disclosure has a wider depth of field range, thereby effectively suppressing the further growth of myopia.

[0045] It should be noted that in the above Figure 3 and Figure 4 , in order to more clearly illustrate the depth of field, the ratio and range of the depth of field are appropriately enlarged, and the specific positions of the near point and the far point are related to the state of the eyeball 200 (such as pupil size), and are not fixed points. Therefore, it should be understood that the above Figure 3 and Figure 4 only schematically show that the optical lens 100 has a wider depth of field range compared with a single diopter lens, and does not mean that the depth of field of the optical lens 100 must be the distance between the two points C1' and D1' as Figure 4 shown.

[0046] In some examples, in each optical unit 21, the arrangements of the first optical unit 211, the second optical unit 212, and the third optical unit 213 can be different. For example, in the example shown in Figure 1 , the optical lens 100 includes an optical unit 21a, an optical unit 21b, and an optical unit 21c. Along the radial direction of the optical lens 100, the arrangements of the first optical unit 211, the second optical unit 212, and the third optical unit 213 in the optical unit 21a, the optical unit 21b, and the optical unit 21c are different.

[0047] In some examples, in the circumferential and radial directions of the optical lens 100, the first optical unit 211, the second optical unit 212, and the third optical unit 213 may be arranged in a sequential cycle. Specifically, the sequential cyclic arrangement of the first optical unit 211, the second optical unit 212, and the third optical unit 213 means that they are arranged in a cycle in the manner of the first optical unit 211 - the second optical unit 212 - the third optical unit 213 - the first optical unit 211 - the second optical unit 212 - the third optical unit 213 - the first optical unit 211... (see Figure 1 ). In this case, each of the three optical units has different diopters in the adjacent regions in the circumferential and radial directions, which can facilitate the user to view objects through the three optical units simultaneously. While enabling clear vision, it has a wide depth of field and plays a role in suppressing the further development of myopia. Moreover, by alternately arranging the first optical unit 211, the second optical unit 212, and the third optical unit 213, it is also beneficial to form higher-order aberrations, thereby further increasing the depth of field of the optical lens 100 to better achieve the effect of controlling myopia. In the present disclosure, the "three optical units" refer to the first optical unit 211, the second optical unit 212, and the third optical unit 213.

[0048] Figure 5 FIG. is a schematic diagram showing a second embodiment of the optical lens 100 involved in the examples of the present disclosure. Figure 6 FIG. shows Figure 5 a schematic diagram of the optical unit group 23 of the optical lens 100 shown. Figure 7 FIG. shows Figure 5 an application scenario diagram of the optical lens 100 shown. In Figure 7 , in order to more clearly illustrate the scenario of light passing through the optical lens 100, only one optical unit 21 arranged in the order of the third optical unit 213 - the first optical unit 211 - the second optical unit 212 is retained in the radial direction from the center of the optical lens 100 for illustration, and other optical units 21 are omitted.

[0049] In some examples, in the circumferential and radial directions of the optical lens 100, the first optical unit 211, the second optical unit 212, and the third optical unit 213 may also be arranged in a cycle in the manner of the first optical unit 211 - the second optical unit 212 - the first optical unit 211 - the third optical unit 213 - the first optical unit 211 - the second optical unit 212 - the first optical unit 211 - the third optical unit 213... (see Figure 5 ). In this case, a first optical unit 211 is provided between each second optical unit 212 and each third optical unit, which is beneficial to improving the clarity of vision.

[0050] In some examples, such as Figure 7 shown, the light rays emitted at a first distance from the eyeball 200 are imaged on the retina via the central optical zone 10 and the first optical unit 211, are imaged in front of the retina via the second optical unit 212 to form myopic defocus, and are imaged behind the retina via the third optical unit 213 to form hyperopic defocus. The user's brain can adaptively select an appropriate focal length from a wider range of focal depth regions, thereby effectively suppressing the further growth of myopia.

[0051] In some examples, among any adjacent units of the first optical unit 211, the second optical unit 212, and the third optical unit 213, the two can be attached to each other. In this case, the three optical units are closely attached, which can facilitate the user to view objects through the three optical units simultaneously, thereby being beneficial to clear vision and myopia control.

[0052] In some examples, when projected along a direction perpendicular to the center of the optical lens 100, the first optical unit 211, the second optical unit 212, and the third optical unit 213 can generally be rectangular. In this case, it can facilitate the attachment of the first optical unit 211, the second optical unit 212, and the third optical unit 213 to each other. It should be noted that in the present disclosure, "generally rectangular" means that the shapes of the respective first optical units 211, second optical units 212, and third optical units 213 are approximately rectangular. For example, in the example shown in Figure 5 , actually, each of the first optical units 211, second optical units 212, and third optical units 213 is formed into an arc-shaped sheet. However, since the bending angles of the opposite sides along the radial direction of the lens 100 and the inclination angles of the opposite sides along the circumferential direction of the lens 100 are relatively small, they can be regarded as rectangular shapes and also fall within the scope of "generally rectangular" as described in the present disclosure.

[0053] In some examples, the peripheral optical zone 20 can be divided into a plurality of optical unit groups 23 that are sequentially connected along the circumferential direction of the lens. The optical unit groups can include a plurality of first optical unit groups 231, a plurality of second optical unit groups 232, and a plurality of third optical unit groups 233 (see Figure 5 ). Among them, each first optical unit group 231 includes a plurality of first optical units 211 that are spirally distributed from the inner circumference to the outer circumference of the peripheral optical zone 20, and adjacent first optical units 211 share endpoints; and / or each second optical unit group 232 includes a plurality of second optical units 212 that are spirally distributed from the inner circumference to the outer circumference of the peripheral optical zone 20, and adjacent second optical units 212 share endpoints; and / or each third optical unit group 233 includes a plurality of third optical units 213 that are spirally distributed from the inner circumference to the outer circumference of the peripheral optical zone 20, and adjacent third optical units 213 share endpoints (seeFigure 6 )。 In this case, by configuring each optical unit in a spiral distribution, the multiple first optical units 211, the multiple second optical units 212, and the multiple third optical units 213 can be evenly distributed, facilitating the user to view objects through the three optical units simultaneously, effectively suppressing the further development of myopia while ensuring clear vision.

[0054] For the optical lens 100 with each optical unit arranged in a spiral manner, the circumferential and radial directions of the optical lens 100 are also set in accordance with the above-described cyclic arrangement method.

[0055] In some examples, each line segment extending from the inner edge to the outer edge of the peripheral optical zone 20 in the radial direction of the optical lens 100 can define the boundary of each optical unit 21. For example, in the Figure 5 example shown, the line segment L1 extending from the inner edge to the outer edge of the peripheral optical zone 20 in the radial direction of the optical lens 100 is simultaneously the boundary of multiple adjacent optical units 21. Thus, it is convenient for each optical unit 21 to be closely attached.

[0056] In some examples, each line segment extending from the inner edge to the outer edge of the peripheral optical zone 20 in the radial direction of the optical lens 100 can define the boundaries of the first optical unit 211, the second optical unit 212, and the third optical unit 213. For example, in the Figure 5 example shown, the line segment L1 extending from the inner edge to the outer edge of the peripheral optical zone 20 in the radial direction of the optical lens 100 is simultaneously the boundary of multiple adjacent first optical units 211, second optical units 212, and third optical units 213. Thus, it is convenient for the first optical unit 211, the second optical unit 212, and the third optical unit 213 to be closely attached to each other.

[0057] Figure 8 is a schematic diagram showing a third embodiment of the optical lens 100 involved in the examples of the present disclosure. Figure 9 is showing Figure 8 a schematic diagram of the sector-shaped optical unit 22 of the optical lens 100 shown.

[0058] In some examples, the peripheral optical zone 20 can be divided into multiple sector-shaped optical units 22 connected in sequence along the circumferential direction of the lens (see Figure 8 ). Among them, each sector-shaped optical unit 22 includes a first optical unit 211 and a second optical unit 212 arranged alternately in the radial direction, or a first optical unit 211 and a third optical unit 213 (see Figure 9) Among them, at the same radial position of the optical lens 100, adjacent sector optical units 22 are arranged with units having different refractive powers. Thus, it is convenient for the user to view objects through three optical units simultaneously, effectively suppressing the further development of myopia while ensuring clear vision.

[0059] In examples such as Figure 8 and Figure 9 shown, the sector optical unit 22a may include a first optical unit 211 and a second optical unit 212 arranged alternately along the radial direction of the lens, the sector optical unit 22b may include a first optical unit 211 and a third optical unit 213 arranged alternately along the radial direction of the lens, and at the same radial position of the optical lens 100, adjacent sector optical units 22a and 22b may be arranged with units having different refractive powers.

[0060] In some examples, the central angle of the optical unit 21 may be 5° to 20°, more preferably, the central angle is set to 8° - 15°, and most preferably, the central angle is set to 10 - 12°. Herein, the central angle of the optical unit 21 refers to the included angle formed by the lines connecting the two edge endpoints of the optical unit 21 along the circumferential direction of the lens to the center of the lens. In this case, the size of the optical unit 21 can be matched with the size of an ordinary human eye, so that it is convenient for the user to view objects through three optical units simultaneously when viewing objects through the peripheral optical zone 20.

[0061] In some examples, the central angle of the first optical unit 211, the second optical unit 212, and / or the third optical unit 213 may be 5° to 20°. For example, the central angle of the first optical unit 211, the second optical unit 212, and / or the third optical unit 213 may be 5°, 6°, 7°, 8°, 10°, 12°, 13°, 15°, 16°, 18°, 19°, or 20°. In some examples, the central angle of the sector optical unit 22 may be 5° to 20°.

[0062] In some examples, the size of the optical unit 21 in the radial direction of the optical lens 100 may be 0.5 mm to 4 mm, more preferably, 0.8 mm - 2.5 mm. In this case, the size of the optical unit 21 can be matched with the size of an ordinary human eye, so that it is convenient for the user to view objects through three optical units simultaneously. Of course, the size of the optical unit 21 in the radial direction of the optical lens 100 may also be less than 0.5 mm or greater than 4 mm, and it can be adjusted according to the shape of the target eyeball 200.

[0063] In some examples, the sizes of the first optical unit 211, the second optical unit 212, and / or the third optical unit 213 in the radial direction of the optical lens 100 can be from 0.5 mm to 4 mm. For example, the sizes of the first optical unit 211, the second optical unit 212, and / or the third optical unit 213 in the radial direction of the optical lens 100 can be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, or 4 mm.

[0064] According to the present disclosure, each of the first optical unit 211, the second optical unit 212, and the third optical unit 213 with appropriate central angles and radial sizes, combined with their circumferential and radial cyclic arrangement on the optical lens 100, ensures that when the user's eyeball views objects through different positions of the optical lens 100, each group of the first optical unit 211, each group of the second optical unit 212, and each group of the third optical unit 213 can all play a role in vision adjustment. In particular, in this form of arrangement, during the circumferential and radial rotation of the eyeball, there are corresponding first optical unit 211, second optical unit 212, and third optical unit 213 corresponding to the pupil (cornea), ensuring that the clarity of the objects seen by the eyes does not change significantly.

[0065] In some examples, the central angles and radial sizes of the respective optical units 21 in the same radial direction of the lens can be the same. Specifically, the central angles and radial sizes of the first optical unit 211, the second optical unit 212, and the third optical unit 213 in the same radial direction of the lens can be the same. Thereby, it is beneficial to the uniform distribution of the first optical unit 211, the second optical unit 212, and the third optical unit 213, facilitating the user to view objects through the three optical units simultaneously.

[0066] In some examples, the central angles and sizes of the respective optical units 21 in the peripheral optical zone 20 can be different. For example, the central angles and sizes of the respective optical units 21 can be adjusted based on the morphological characteristics of the target eyeball 200 according to the quadrant-specific design of the peripheral optical zone 20. In this case, since the morphology of the target eyeball 200 may be different in each quadrant, adjusting the central angles and sizes of the respective optical units 21 based on the actual morphology of the target eyeball 200 can improve the degree of adaptation between the optical lens 100 and the target eyeball 200.

[0067] In some examples, in the radially outward direction of the optical lens 100, the widths of the respective first optical unit 211, second optical unit 212, and third optical unit 213 can gradually increase (see Figure 5 or Figure 8 ). Herein, the width refers to the vertical distance between the two most distal points of the two opposite sides along the circumferential direction.

[0068] In some examples, the second refractive power may be greater than the first refractive power by 0.25 D to 10 D. In some examples, preferably, the second refractive power may be greater than the first refractive power by 1.5 D - 4 D. In some examples, the third refractive power may be less than the first refractive power by 0.25 D to 10 D. In this case, a depth of field range of at least ±0.25 D can be obtained based on the first refractive power. Additionally, selecting the difference between the second refractive power and the third refractive power according to the actual situation can be adapted to the target eyeball 200.

[0069] In some examples, the second refractive power may be greater than the first refractive power by 0.25 D, 0.5 D, 0.75 D, 1 D, 1.5 D, 1.75 D, 2 D, 3 D, 4 D, 5 D, 6 D, 7 D, 8 D, 9 D, or 10 D. In some examples, the third refractive power may be less than the first refractive power by 0.25 D, 0.5 D, 0.75 D, 1 D, 1.5 D, 1.75 D, 2 D, 3 D, 4 D, 5 D, 6 D, 7 D, 8 D, 9 D, or 10 D.

[0070] In some examples, the difference between the second refractive power and the first refractive power may be different from the difference between the third refractive power and the first refractive power. For example, in some examples, the difference between the second refractive power and the first refractive power may be less than the difference between the third refractive power and the first refractive power. In this case, the far point of the optical lens 100 can be located at a farther position, and thus the image is formed at a more forward position in front of the retina, making the depth of focus range in front of the retina larger than the depth of focus range behind the retina. At this time, when automatically focusing through the brain, a wider depth of focus range in front of the retina can be selected, thereby effectively suppressing the further development of myopia.

[0071] In some examples, on the front surface and / or the rear surface of the optical lens 100, the area of the peripheral optical zone 20 accounts for 20% to 80% of the area of the optical lens 100. For example, the area of the peripheral optical zone 20 accounts for 20%, 25%, 30%, 35%, 40%, 50%, 60%, 70%, 75%, or 80% of the area of the optical lens 100. In this case, on the one hand, the depth of field of the lens can be effectively extended to control myopia, and on the other hand, it is also convenient for the user to view objects through at least a part of the peripheral optical zone 20 when wearing the optical lens 100.

[0072] In some examples, on the front surface and / or the rear surface of the optical lens 100, the area of the first optical unit 211 may be not less than the area of the second optical unit 212 and / or the area of the third optical unit 213. For example, in some examples, the area of the first optical unit 211 may be equal to the sum of the area of the second optical unit 212 and the area of the third optical unit 213. In this case, it is beneficial to improve the clarity of vision through the optical lens 100.

[0073] In some examples, on the front surface and / or the rear surface of the optical lens 100, the difference in the proportion of the areas of the second optical unit 212 and the third optical unit 213 in the total area of the peripheral optical zone 20 may be not greater than 10%. For example, in an example where the area of the second optical unit 212 accounts for 30% of the area of the peripheral optical zone 20, the area of the third optical unit 213 may account for 20% to 40% of the area of the peripheral optical zone 20.

[0074] In some examples, on the front surface and / or the rear surface of the optical lens 100, the area of the second optical unit 212 may be equal to the area of the third optical unit 213. In this case,

[0075] In some examples, the first optical unit 211, the second optical unit 212, and the third optical unit 213 may be microlenses with corresponding refractive powers. Thus, the first optical unit 211, the second optical unit 212, and the third optical unit 213 with corresponding refractive powers can be obtained.

[0076] In some examples, the diameter of the central optical zone 10 may be 8 mm to 12 mm. For example, the diameter of the central optical zone 10 may be 8 mm, 8.5 mm, 8.8 mm, 9 mm, 9.2 mm, 9.6 mm, 10.0 mm, 10.2 mm, 10.5 mm, 10.8 mm, 11 mm, 11.2 mm, 11.5 mm, 11.8 mm, or 12 mm. In this case, the central optical zone 10 can be matched to the size of an ordinary human eye, and when the user looks directly at the center of the glasses to view an object, most of the light emitted by the object at the target distance can enter through the central optical zone 10, which is beneficial for clear vision. Of course, the diameter of the central optical zone 10 can also be adjusted adaptively according to the shape of the target eyeball 200.

[0077] In some examples, the optical lens 100 may further include a peripheral edge zone 30 surrounding the outer periphery of the peripheral optical zone 20 (see Figure 1) Among them, the outer peripheral region 30 may have a first refractive power. In this case, the light rays incident through the outer peripheral region 30 can be imaged on the retina, thus facilitating clear vision. Moreover, when the optical lens 100 is applied to a frame glasses, the optical lens 100 can be assembled on the frame by fixing the outer peripheral region 30.

[0078] In some examples, the optical lens 100 may also be composed of a central optical region 10 and a peripheral optical region 20 surrounding the outer periphery of the central optical region 10. When it is necessary to apply the optical lens 100 to frame glasses, the optical lens 100 can be assembled on the frame by fixing the peripheral optical region 20.

[0079] In some examples, for the frame glasses equipped with the optical lens 100 of the present disclosure, an anti-slip mechanism can be provided on the frame to reduce the undesired movement of the frame glasses when the user wears them. In this case, it is beneficial to clear vision.

[0080] In some examples, as described above, the optical lens 100 may also be an intraocular lens. At this time, the optical lens 100 may be made of a rigid high oxygen permeability material. In this case, it can not only make the optical lens 100 have good oxygen permeability, but also improve the abrasion resistance of the optical lens 100 and is beneficial to the production of the optical lens 100. In some examples, the oxygen permeability coefficient (DK value) of the rigid high oxygen permeability material may be 100 to 200. In some examples, the rigid high oxygen permeability material may be one selected from silicone methacrylate, fluorosilicone methacrylate, perfluoroether, and fluorinated silicone.

[0081] It should be understood that the other parameters of the above optical lens 100 are only exemplary descriptions of the optical lens 100 formed according to the design concept of the present invention. In fact, the optical lens 100 formed by the design concept of the present invention may also have other parameters that can be appropriately adjusted according to the state of the target eyeball 200.

[0082] In summary, according to the present disclosure, an optical lens 100 with high visual clarity and a wide depth of field range to control the further development of myopia can be provided.

[0083] Although the present disclosure has been specifically described above in combination with the drawings and embodiments, it can be understood that the above description does not limit the present disclosure in any form. Those skilled in the art can make deformations and changes to the present disclosure according to needs without departing from the essential spirit and scope of the present disclosure, and these deformations and changes all fall within the scope of the present disclosure.

Claims

1. An optical lens, characterized in that: It includes a central optical zone located at the center of the lens and a peripheral optical zone surrounding the outer periphery of the central optical zone. The central optical zone has a first refractive power based on the refractive error of the eye. The peripheral optical zone includes multiple optical units, and the optical units include a first optical unit, a second optical unit, and a third optical unit. The user can view objects through the first optical unit, the second optical unit, and the third optical unit located in the peripheral optical zone simultaneously. The first optical unit has the first refractive power, the second optical unit has a second refractive power greater than the first refractive power, and the third optical unit has a third refractive power less than the first refractive power. The area of the first optical unit is not less than the area of the second optical unit and / or the third optical unit. When wearing the optical lens to view objects, an object at a first distance from the eye forms an image on the retina via the first optical unit, an object at a second distance from the eye forms an image on the retina via the second optical unit, and an object at a third distance from the eye forms an image on the retina via the third optical unit. The optical lens has a depth of field based on the second distance and the third distance. In the circumferential and radial directions of the optical lens, the first optical unit, the second optical unit, and the third optical unit are arranged in a sequential cycle, so that each of the first optical unit, the second optical unit, and the third optical unit has different diopter powers in the circumferential and radial adjacent areas.

2. The optical lens according to claim 1, wherein: In any adjacent units of the first optical unit, the second optical unit, and the third optical unit, the two are in contact with each other.

3. The optical lens according to claim 2, wherein: When projected along a direction perpendicular to the center of the optical lens, the first optical unit, the second optical unit, and the third optical unit are generally rectangular.

4. The optical lens according to claim 3, wherein: The peripheral optical zone can be divided into multiple optical unit groups connected in sequence along the circumferential direction of the lens. The multiple optical unit groups include multiple first optical unit groups, multiple second optical unit groups, and multiple third optical unit groups. Among them, Each of the first optical unit groups includes multiple first optical units spirally distributed from the inner circumference to the outer circumference of the peripheral optical zone, and adjacent first optical units share endpoints; and / or Each of the second optical unit groups includes multiple second optical units spirally distributed from the inner circumference to the outer circumference of the peripheral optical zone, and adjacent second optical units share endpoints; and / or Each of the third optical unit groups includes multiple third optical units spirally distributed from the inner circumference to the outer circumference of the peripheral optical zone, and adjacent third optical units share endpoints.

5. The optical lens according to any one of claims 1-4, wherein: In the radial direction of the optical lens, each line segment extending from the inner edge to the outer edge of the peripheral optical zone defines the boundary of each optical unit.

6. The optical lens according to claim 1, wherein: The peripheral optical zone can be divided into a plurality of sector-shaped optical units connected in sequence along the circumferential direction of the optical lens. Each of the sector-shaped optical units includes the first optical unit and the second optical unit, or the first optical unit and the third optical unit, which are arranged alternately along the radial direction. Wherein, at the same radial position of the optical lens, adjacent sector-shaped optical units are arranged with units having different refractive powers.

7. The optical lens according to claim 1 or 6, wherein: The central angle of the optical unit is 5° to 20°.

8. The optical lens according to claim 1 or 6, wherein: The size of the optical unit in the radial direction of the optical lens is 0.5 mm to 4 mm.

9. The optical lens according to claim 1, wherein: The diameter of the central optical zone is 8 mm to 12 mm.

10. The optical lens according to claim 1, wherein: On the front surface and / or the rear surface of the optical lens, the area of the peripheral optical zone accounts for 20% to 80% of the area of the optical lens.

11. The optical lens according to claim 1, wherein: The second refractive power is 0.25 D to 10 D greater than the first refractive power, and the third refractive power is 0.25 D to 10 D less than the first refractive power.

12. The optical lens according to claim 1, wherein: It further includes an outer peripheral zone surrounding the outer periphery of the peripheral optical zone, and the outer peripheral zone has the first refractive power.

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