Peripheral out-of-focus lens assembly and glasses

Abstract

The utility model discloses a peripheral out-of-focus lens assembly and glasses, and the assembly comprises a basic lens which generates perspective focal power for perspective light; the single image source is arranged at the edge position of the near-eye side of the basic lens and is far away from the basic lens; the plurality of light splitting surfaces are embedded into the basic lens and are distributed in the basic lens at different inclination angles, and the central normal lines of the plurality of light splitting surfaces are inclined to the side where the image source is located relative to the central normal line of the lens; the light irradiation range of a single image source covers all the light splitting surfaces; each light splitting surface and the shared image source form an out-of-focus unit, each light splitting surface is used for reflecting light rays emitted by the image source to form convergent light rays, the convergent light rays are emitted to an exit pupil position, and an out-of-focus image is formed after the convergent light rays enter human eyes; a plurality of out-of-focus images formed by reflection of the plurality of light splitting surfaces are respectively distributed in a peripheral view field. The peripheral out-of-focus lens assembly and the glasses are used for realizing out-of-focus stimulation, inhibiting eye axis growth and achieving the purpose of preventing and controlling myopia.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of peripheral defocus lens assemblies, and a kind of glasses. BACKGROUND

[0002] In recent years, the incidence of myopia in China is high, and myopia has become a public health problem that cannot be ignored. In today's society, people live fast, work hard and use electronic products frequently. In this case, myopia prevention and control, especially for teenagers, is becoming increasingly important. The myopia prevention and control method based on defocus theory has further developed, providing a new direction for myopia prevention and control methods. Currently, the commonly used myopia prevention and control lens is a defocus lens. The defocus lens can make the central field of view image fall on the retina, thereby completing its refractive correction. And make the peripheral field of view image fall in front of the retina, inhibit the eye axis growth and delay the progression of myopia under the premise of ensuring clear visual imaging. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a peripheral defocus lens assembly and glasses.

[0004] To achieve the above technical purpose, the utility model adopts the following technical scheme:

[0005] A peripheral defocus lens assembly, comprising:

[0006] A base lens, the front surface and the back surface of the base lens have different surface shapes to produce perspective focal power for perspective light rays;

[0007] A single image source, arranged at the edge of one side of the lens and away from the base lens, and

[0008] A plurality of light splitting surfaces, embedded in the base lens and distributed in the base lens at different inclination angles, the central normal lines of the plurality of light splitting surfaces are inclined to the side where the image source is located relative to the central normal line of the lens;

[0009] The light radiation range of the single image source covers all the light splitting surfaces; the light splitting surfaces are used to reflect the light emitted by the image source to form convergent light rays directed to the pupil position, and form defocus images after entering the human eye; a plurality of defocus images formed by reflection of the plurality of light splitting surfaces are respectively distributed in the peripheral field of view away from the visual axis.

[0010] Preferably, the image source is inclinedly arranged towards the base lens, and the diffusion angle of the light emitted by the image source is between 20° and 60°.

[0011] Preferably, the surface shape of the light splitting surface is a free-form surface.

[0012] Preferably, the optical surface type of the light splitting surface is an XY polynomial free-form surface based on an ellipsoid, and its optical description equation is expressed as:

[0013]

[0014] wherein, l1 and l2 represent the distance from any point on the ellipsoid to the two focal points, represents half of the included angle between any point on the ellipsoid and the line connecting the two focal points.

[0015] Preferably, the light splitting surface is concave to the human eye.

[0016] Preferably, the Alpha tilt angle of the plurality of light splitting surfaces gradually decreases in the direction from top to bottom, and the Beta tilt angle of the plurality of light splitting surfaces is symmetric about the vertical plane where the visual axis is located.

[0017] Preferably, the Alpha tilt angle of the plurality of light splitting surfaces is between 0° and 30°, and the Beta tilt angle of the plurality of light splitting surfaces is between ±20°.

[0018] Preferably, the positions of the plurality of light splitting surfaces are distributed in a ring around the center of the base lens.

[0019] Preferably, the positions of the plurality of light splitting surfaces are symmetrically distributed with respect to the horizontal and / or vertical axes of the base lens.

[0020] An eyeglass, comprising a frame and two sets of the above peripheral defocus lens assembly, respectively corresponding to the left eye and the right eye, wherein in each set of the peripheral defocus lens assembly, the base lens is arranged in the frame, the image source is arranged at the front of the temple near the base lens, and the vertical distance from the image source to the inner surface of the base lens is between 15 mm and 30 mm.

[0021] The glasses provided by the utility model include periphery defocus lens assembly arranged corresponding to left eye and right eye respectively, each periphery defocus lens assembly includes base lens, multiple light splitting surfaces embedded in the base lens and single image source arranged outside the base lens and located on the near eye side, each periphery defocus lens assembly realizes the reflection of the light of the single image source by the multiple light splitting surfaces embedded in the base lens, thereby forming multiple defocus images in the peripheral field of view of the human eye, realizing defocus stimulation, inhibiting the axial length growth and achieving the purpose of myopia prevention and control. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A perspective view of the periphery defocus lens assembly provided by the first embodiment;

[0023] Figure 2 A setting diagram of the light splitting surface in the periphery defocus lens assembly shown in the first embodiment; Figure 1

[0024] Figure 3 A light path principle diagram of the periphery defocus lens assembly shown in the first embodiment; Figure 1

[0025] An eye entry picture diagram of the periphery defocus lens assembly provided by the first embodiment; Figure 4

[0026] A perspective view of the periphery defocus lens assembly provided by the second embodiment; Figure 5

[0027] An eye entry picture diagram of the periphery defocus display system provided by the second embodiment. Figure 6 DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] ​​It should be noted that if the embodiment of the utility model has directionality indication (such as up, down, left, right, front, back), the directionality indication is only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture (as shown in the drawing), if the specific posture changes, then the directionality indication also changes accordingly.

[0030] As Figure 1 And Figure 5 The utility model provides a kind of peripheral defocus lens assembly, including basic lens 103, single image source 104 and multiple light splitting surface 102;Wherein, basic lens 103 is used to see-through ambient light, and there is surface difference in the two surfaces of basic lens 103, to produce see-through focal power to see-through light;Single image source 104 is arranged at the edge position of the near eye side of basic lens, and is away from basic lens 103;Multiple light splitting surface 102 is embedded in basic lens 103 and is distributed in basic lens 103 with different inclination angles, and the central normal line of multiple light splitting surface 102 is inclined to the side where image source 104 is located relative to the central normal line of basic lens 103, and the number of the light splitting surface 102 is preferably not less than 4.Single image source 104 light irradiation range covers all light splitting surface 102;Each light splitting surface 102 and common image source 104 respectively form a defocus unit;Light splitting surface 102 is used to reflect the light emitted by image source 104, form convergent light and be shot to exit pupil position, and form defocus image 110 after entering human eye;Multiple defocus images 110 corresponding to the reflection of multiple light splitting surfaces are respectively distributed in peripheral field of view away from visual axis.

[0031] The utility model also provides a kind of glasses, including two peripheral defocus lens assemblies and frame, and each peripheral defocus lens assembly includes a basic lens 103, an image source 104 and multiple light splitting surface 102, and two peripheral defocus lens assemblies are respectively arranged in frame corresponding to left eye and right eye;Wherein, in each peripheral defocus lens assembly, basic lens 103 is arranged in frame, single image source 104 is arranged at the position near lens in front of temple, and there is a certain distance between image source 104 and basic lens 103, to ensure that the light of image source 104 can completely cover all light splitting surface 102.

[0032] Only single peripheral defocus lens assembly arranged in glasses is described below, and another peripheral defocus lens assembly is symmetrically arranged with the above peripheral defocus lens assembly, which will not be described here. Figure 1 And Figure 6 Two embodiments of the peripheral defocus lens assembly provided by the application are respectively shown, wherein multiple light splitting surface 102 is distributed in basic lens 103 in two different distribution modes.Two specific embodiments are described below in conjunction with the drawings.

[0033] First Embodiment

[0034] like Figures 1 to 4 As shown, a rectangular coordinate system is established with the exit pupil position 101 of the basic lens as the origin, the visual axis direction as the positive z-axis, the horizontal leftward direction as the positive x-axis, and the vertical upward direction as the positive y-axis.

[0035] The base lens 103 is a circular lens with a diameter of approximately 80mm. The base lens 103 can be customized into different shapes to fit different frames. The base lens 103 is used to transmit ambient light and fix the eight beam splitters 102. The base lens 103 has a first curved surface (i.e., the near-eye side surface) near the exit pupil 101 and facing the human eye, and a second curved surface away from the exit pupil 101 and facing away from the human eye. The first and second curved surfaces have the same surface shape, or they may have different surface shapes, to produce transmittive power to accommodate different users' visual acuity. The central axis of the base lens 103 corresponds to the visual axis of the human eye passing through the center of the exit pupil. The central axis of the base lens 103 coincides with the central normal of the first and second curved surfaces.

[0036] Eight beam-splitting surfaces 102 are embedded inside the base lens 103 and are arranged in a single or multiple ring shape centered on the central axis of the base lens 103 (i.e., the position corresponding to the visual axis). Multiple beam-splitting surfaces can be staggered in adjacent ring layers or arranged correspondingly along the same radial direction. In this embodiment, two beam-splitting surfaces are arranged along the same radial direction, and the eight beam-splitting surfaces are divided into four groups and respectively arranged in the upper, lower, left, and right peripheral fields of view. The arrangement of the eight beam-splitting surfaces 102 avoids the central field of view of the base lens 103. In this distribution, the positions of the eight beam-splitting surfaces 102 are symmetrically distributed with respect to both the horizontal and vertical axes of the base lens 103. It can be understood that in other embodiments, the arrangement of the multiple beam-splitting surfaces 102 may be symmetrical only with respect to the horizontal and / or vertical axes of the base lens 103, without being centrally symmetrical about the central field of view.

[0037] Image source 104 employs a microdisplay, such as a high-brightness, high-resolution, miniaturized MicroOLED display. Alternatively, image source 104 employs a light source with a mask. Both image sources can provide defocused images to the human eye via beam splitter 102. Image source 104 allows for manual control of the defocused image content and a manual on / off switch to change the peripheral defocus mode, adapting to diverse application scenarios.

[0038] A single image source 104 is arranged at the edge of the base lens 103 on the near-eye side and away from the base lens 103. The image source 104 is used to provide an image source for all the light splitting surfaces 102, and the light irradiation range of the single image source 104 covers all the light splitting surfaces 102. The image source 104 can be arranged at the edge of the base lens 103 in a manner that the central normal is parallel to the x-axis; or preferably, the image source 104 can be arranged at the edge of the base lens 103 in a manner that the image source face is inclined to the base lens 103, and the divergence angle of the light emitted by the image source 104 is between 20° and 60°, so that the light irradiation range of the single image source 104 covers all the light splitting surfaces 102.

[0039] Each light splitting surface 102 and the shared image source 104 form a defocus unit. The light splitting surface 102 is used to reflect the light emitted by the image source 104 to form convergent light rays that are directed to the exit pupil position 101. After the reflected light passes through the exit pupil position 101 in a convergent manner, it enters the human eye on the side of the exit pupil position 101 away from the base lens 103, and forms a defocus image in front of the retina 106 of the wearer. Figure 3 In the embodiment, the arc line 105 represented by the dashed line represents a circular arc surface (i.e., a defocus surface) on which a plurality of defocus images are located, as shown in Figure 4 As shown in FIG. 1, a plurality of defocus units formed by the plurality of light splitting surfaces 102 form a plurality of defocus images 110 that are respectively distributed in the peripheral field of view away from the visual axis.

[0040] When the structure of the base lens 103 and the light splitting unit 102 is determined, the arrangement position of the image source 104 is also determined. The distance between the base lens 103 and the human eye is about 10 mm to 20 mm, and is generally 12 mm. The image source 104 is arranged at the edge of the base lens 103 on the near-eye side, and the light emitted by the image source 104 needs to completely cover the plurality of light splitting surfaces 102 inside the base lens 103. Taking the Figure 3 direction as an example, the distance between the image source 104 and the inner surface of the base lens 103 along the visual axis direction (i.e., the vertical distance) is about 15 mm to 30 mm, and the distance between the image source 104 and the visual axis is about 15 mm to 25 mm.

[0041] The 8 light splitting surfaces 102 are embedded in the base lens 103, and reflect the light provided by the image source 104 according to the set transmittance and reflectance ratio and direct the light to the exit pupil position 101. The light splitting surface 102 is a concave light splitting mirror or a concave light splitting film that is concave toward the human eye, and the transmittance and reflectance ratio of the 8 light splitting surfaces 102 can be the same.

[0042] The optical surface of the light splitting surface 102 is a free-form surface, which is used to improve the image quality of the defocus image. Preferably, the optical surface of the light splitting surface 102 can be an XY polynomial free-form surface with an ellipsoidal base, and the optical description equation is represented as:

[0043]

[0044] wherein, l1 and l2 represent the distance from any point on the ellipsoid to the two focal points, represents the half of the angle between any point on the ellipsoid and the line connecting the two focal points.

[0045] This type of surface can be realized as a user-defined surface in CODE V.

[0046] Table 1 shows the element parameters of each light splitting surface 102 in the first embodiment, the serial number of each light splitting surface is shown in Figure 1 , wherein the coordinate axis of the tilt angle is shown in Figure 2 , the tilt angle standard is that the parallel to the xOy plane is 0°, wherein the Alpha tilt is with the x axis as the rotation axis, the Beta tilt is with the y axis as the rotation axis, the clockwise rotation angle is negative, and the counterclockwise rotation angle is positive.

[0047] Table 1 shows the element parameters of each light splitting surface 102 in the first embodiment, the serial number of each light splitting surface is shown in

[0048]

[0049] From the above data, it can be seen that the surface type parameters of the plurality of light splitting surfaces are different, and the tilt angles of the plurality of light splitting surfaces are also different, and the parameters of each light splitting surface need to be determined according to the surface curvature of the base lens, combined with the defocus degree to be achieved, and the distribution position of the light splitting surface. The Alpha tilt angle of the plurality of light splitting surfaces 102 gradually decreases in the direction from top to bottom, and the Alpha tilt angle of the plurality of light splitting surfaces is between 0° and 30°; the Beta tilt angle of the plurality of light splitting surfaces is symmetrically left and right around the vertical plane (i.e. the yOz plane) where the visual axis is located, and the Beta tilt angle of the plurality of light splitting surfaces is between ±20°.

[0050] Table 2 shows the parameters of the remaining optical elements in the first embodiment, wherein the tilt angle of the base lens 103 is parallel to the xOy plane, the clockwise rotation angle is negative, and the counterclockwise rotation angle is positive.

[0051] Table 2 shows the parameters of the remaining optical elements in the first embodiment, wherein the tilt angle of the base lens 103 is parallel to the xOy plane, the clockwise rotation angle is negative, and the counterclockwise rotation angle is positive.

[0052]

[0053] The 8 light splitting surfaces 102 are embedded in the base lens 103, and the optical path principle diagram of the plurality of defocus units is as shown in Figure 3As shown, ambient light is transmitted and imaged through the second curved surface of the base lens 103 away from the exit pupil and the first curved surface near the exit pupil. The optical power of the base lens 103 can be customized according to the human eye's visual acuity, allowing the human eye to clearly see the external environment. The image source 104 and multiple beam-splitting surfaces 102, combined with the first curved surface of the base lens 103, achieve defocus imaging in the direction away from the lens at the exit pupil. The image source 104 is located at the edge of the lens 103 and can be fixed in conjunction with the eyeglass frame. In this embodiment, during defocus imaging, the image source 104 emits light towards the base lens 103. The light is transmitted through the first curved surface of the base lens 103 near the exit pupil and reaches each beam-splitting surface 102. Since the beam-splitting surface 102 has a beam-splitting function and is concave towards the human eye, the light is reflected by the beam-splitting surface 102 to the first curved surface of the base lens 103. After being transmitted through the first curved surface of the base lens 103, it is reflected at a certain tilt angle relative to the central normal of the base lens 103 to the exit pupil position 101. Defocus imaging is performed on the side of the exit pupil position away from the lens with a predetermined defocus degree. In the above process, the light is reflected by a single beam-splitting surface 102 to form a single converging light beam, thereby achieving defocus imaging in the human eye. Furthermore, the light reflected by all beam-splitting surfaces 102 is directed towards the exit pupil position at different angles, and the multiple light beams are converged as a whole, thus achieving defocus imaging around the human eye's retina.

[0054] Due to the aforementioned defocusing effect, when the human eye is positioned at the exit pupil, the light emitted from the image source 104, after being reflected by the beam splitter 102 and directed towards the exit pupil 101, is focused by the human eye onto the defocus surface 105 located in front of the retina 106. This causes defocus stimulation to the peripheral visual field of the human eye. Because the human eye has a defocus accommodation mechanism, the defocus stimulation causes the eye to automatically compress the axial length to ensure that the retina 106 moves closer to the defocus surface 105, thereby inhibiting axial elongation and achieving the purpose of myopia control. Preferably, the defocus power of the defocused image can also be adjusted by adjusting the distance between the image source 104 and the beam splitter 102, or by adjusting the specific surface parameters of the beam splitter 102, to adapt to the defocus requirements of different visual acuity eyes and generate effective defocus stimulation.

[0055] like Figure 4 The image shown is the display screen observed by the human eye through the aforementioned defocus display system. In the peripheral area of ​​the display screen, eight defocused images projected by the defocus units are displayed, each corresponding to... Figure 2 The glasses show eight beam-splitting surfaces. Through these glasses, the user's eye is stimulated by eight defocused images at the periphery of the screen while observing the external environment normally, thus achieving the functional purpose of myopia protection.

[0056] Second Embodiment

[0057] The peripheral defocus lens assembly provided in the second embodiment is similar to that in the first embodiment, wherein the optical path principle used by each defocus optical path is the same as that in the first embodiment. The difference lies in the distribution of the multiple beam-splitting surfaces 102 in the base lens 103 in this embodiment.

[0058] like Figure 5 The peripheral defocus lens assembly shown includes a base lens 103 and multiple beam splitters 102. The base lens 103 is a circular lens with a diameter of approximately 80mm. The base lens 103 can be customized into different shapes to fit different frames. The base lens 103 is used to transmit ambient light and fix the 16 defocus units. The base lens 103 has a first curved surface concave towards the exit pupil position 101 and a second curved surface distant from the exit pupil position. The first and second curved surfaces of the base lens 103 have the same surface shape, or the first and second curved surfaces of the base lens 103 have different surface shapes to produce transmitted optical power, adapting to the visual acuity of different users. The center of the base lens 103 corresponds to the visual axis of the human eye passing through the center of the exit pupil.

[0059] In this embodiment, 16 beam-splitting surfaces 102 are embedded within the base lens 103 and arranged in a ring around the visual axis in the peripheral field of view. The 16 beam-splitting surfaces 102 are discretely distributed within the base lens 103 relative to its inner surface. The positional distribution and surface design of the 16 beam-splitting surfaces 102 are similar to the arrangement of the 8 beam-splitting surfaces 102 in the first embodiment. In this embodiment, the 16 beam-splitting surfaces are evenly distributed in eight groups around the central field of view in the peripheral field of view, with two beam-splitting surfaces in each group arranged along the same radial direction. The 16 beam-splitting surfaces 102 are arranged in a ring around the central field of view (i.e., the position corresponding to the visual axis) of the base lens 103 and are symmetrically distributed relative to the horizontal and vertical midlines of the base lens 103. Compared to the first embodiment, by increasing the number of beam-splitting surfaces, the number of defocused images is increased, thereby enhancing the defocus stimulation to the human eye.

[0060] The optical surface of the beam-splitting surface 102 is a freeform surface, used to improve the image quality of the defocused image. Preferably, it is an XY polynomial freeform surface with an ellipsoidal base, and its optical description equation is expressed as follows:

[0061]

[0062] Where l1 and l2 represent the distances from any point on the ellipsoid to the two foci. It represents half the angle between the lines connecting any point on the ellipsoid to the two foci.

[0063] Table 3 shows the component parameter ranges for each beam-splitting surface 102 in the second embodiment. The tilt angle standard is the same as in the first embodiment, with 0° defined as parallel to the xOy plane. The Alpha tilt is rotated around the x-axis, and the Beta tilt is rotated around the y-axis. Clockwise rotation is negative, and counterclockwise rotation is positive. The distribution pattern and angle range of the Alpha and Beta tilt angles of the multiple beam-splitting surfaces 102 are the same as in the first embodiment.

[0064] Table 3 Parameters of some optical lenses in the second embodiment

[0065]

[0066] In this embodiment, the image source 104 employs a microdisplay, such as a high-brightness, high-resolution, miniaturized MicroOLED display. Alternatively, the image source 104 employs a light source with a mask. Both of these image sources can provide image sources for the 16 beam-splitting surfaces. The image source 104 can be manually controlled to control the defocused image content and to manually control its on / off switch, thereby switching the peripheral defocus mode to adapt to diverse application scenarios.

[0067] Image source 104 provides light for defocus imaging to 16 defocus units 102. Each beam splitter 102 and the shared image source 104 constitute a defocus unit. The imaging principle of each defocus unit and the overall imaging principle of all defocus units are the same as in the first embodiment, and will not be described again here.

[0068] like Figure 6 The image shown is the display screen as observed by the human eye through the aforementioned defocus display system. In this display screen, 16 defocused images projected by defocus units are displayed around the central area, each corresponding to... Figure 5 The glasses show 16 beam-splitting surfaces. Through these glasses, while the user's eyes are observing the external environment normally, they are stimulated by defocused images at 16 defocused positions around the periphery of the screen to correct myopia, thus achieving the functional purpose of myopia protection.

[0069] In summary, the peripheral defocus lens assembly and glasses provided by the utility model, including the base lens for perspective ambient light and multiple defocus units. The base lens has certain optical power, which can adapt to the needs of different users to clearly observe the external environment. Multiple defocus units share an image source, and each uses a light splitting surface to reflect the light of the image source to realize defocus imaging, which is used to provide defocus images in the peripheral field of view of the human eye, realize peripheral defocus stimulation, and achieve the purpose of preventing myopia. The peripheral defocus lens assembly and glasses can formulate the specific surface parameters of the base lens and the light splitting surface according to the refractive condition of the wearer, thereby accurately correcting myopia, and in the premise of ensuring clear visual images, superimposing defocus images on real environment images in the form of augmented reality, which has no effect on the perspective direction real environment image, and has a large field of view. Moreover, the image source can be started and stopped according to actual needs, and can adapt to the diversified application environment of defocus and non-defocus.

[0070] The peripheral defocus lens assembly and glasses provided by the utility model are described in detail above. For those skilled in the art, any obvious modification made without departing from the essential content of the utility model will constitute an infringement of the utility model patent right, and the corresponding legal responsibility will be borne.

Claims

1. A peripheral through-focus lens assembly, characterized by include: A base lens, wherein the front and rear surfaces of the base lens have different surface shapes to produce a transmittance power; A single image source is positioned at the edge of the lens near the eye, and away from the base lens setting. Multiple beam-splitting surfaces are embedded in the base lens and distributed in the base lens at different tilt angles. The central normal of the multiple beam-splitting surfaces is tilted towards the side where the image source is located relative to the central normal of the lens. The light irradiation range of the single image source covers all the beam splitters; the beam splitters are used to reflect the light emitted by the image source to form converging light rays that are directed toward the exit pupil and form a defocused image after entering the human eye; the multiple defocused images formed by the reflection of multiple beam splitters are distributed in the peripheral field of view far away from the visual axis.

2. The peripheral defocus lens assembly as described in claim 1, characterized in that: The image source is tilted toward the base lens, and the diffusion angle of the light emitted by the image source is between 20° and 60°.

3. The peripheral defocus lens assembly as described in claim 1, characterized in that: The surface shape of the beam-splitting surface is a freeform surface.

4. The peripheral defocus lens assembly as described in claim 3, characterized in that: The optical shape of the beam-splitting surface is an XY polynomial freeform surface with an ellipsoidal base, and its optical description equation is expressed as: Where l1 and l2 represent the distances from any point on the ellipsoid to the two foci, and φ represents half the angle between any point on the ellipsoid and the lines connecting the two foci.

5. The peripheral defocus lens assembly as described in claim 1, characterized in that: The beam-splitting surface is concave towards the human eye.

6. The peripheral defocus lens assembly as described in claim 1, characterized in that: The alpha tilt angles of the multiple beam-splitting surfaces gradually decrease from top to bottom, and the beta tilt angles of the multiple beam-splitting surfaces are symmetrical about the vertical plane containing the viewing axis.

7. The peripheral defocus lens assembly as described in claim 6, characterized in that: The alpha tilt angle of the plurality of beam-splitting surfaces is between 0° and 30°, and the beta tilt angle of the plurality of beam-splitting surfaces is between ±20°.

8. The peripheral defocus lens assembly as described in claim 1, characterized in that: The positions of the multiple beam-splitting surfaces are arranged in a ring around the center of the base lens.

9. The peripheral defocus lens assembly as described in claim 1, characterized in that: The positions of the multiple beam-splitting surfaces are symmetrically distributed relative to the horizontal and / or vertical lines of the base lens.

10. Eyeglasses comprising a frame, characterized in that It includes two sets of peripheral defocus lens assemblies as described in any one of claims 1-9, wherein in each set of peripheral defocus lens assemblies, the base lens is disposed in the frame, the image source is disposed at the front of the temple near the base lens, and the vertical distance from the image source to the inner surface of the base lens is between 15mm and 30mm.

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