Multifunctional myopia prevention and control glasses

Abstract

The utility model discloses a kind of multifunctional myopia prevention and control glasses, comprising: composite lens, by main lens and inlayed in main lens spectroscope array are composed;Main lens has main diopter for correcting human eye dioptre anomaly;Multiple spectroscope inlay settings are in the edge area of main lens, the reflectivity of spectroscope is not more than 20%;The surface shape of each spectroscope in spectroscope array is taken from one or more of spherical surface, ellipsoidal surface, plane, hyperboloid, parabolic surface;Light source, set in the oblique side of main lens side to human eye, light emitted by light source is refracted via main lens inner surface and is shot to each spectroscope, and is reflected to human eye by each spectroscope, wherein, each spectroscope is used to reflect the illumination light emitted by light source to human eye, and provides competitive defocus, contrast reduction or telescopic signal using different surface shape.The multifunctional myopia prevention and control glasses, with backlight system, combine multiple spectroscope inlay settings in main lens, provide multiple myopia prevention and control light signals.

Description

Technical Field

[0001] This utility model relates to a multifunctional myopia prevention and control glasses. Background Technology

[0002] In recent years, due to the widespread use of consumer electronics, the myopia rate among children and adolescents has been rising year by year. According to data from the National Health Commission, the overall myopia rate among children and adolescents nationwide has remained above 50% in recent years, with a very clear trend of myopia onset at younger ages. The prevention of myopia and the control of its progression have become major issues that urgently require attention and resolution from the entire society.

[0003] Prescription lenses are ophthalmic lenses. Wearing glasses with the appropriate prescription based on eye exam results can correct refractive errors in individuals. Wearing defocus lenses is considered an effective method for myopia control. Currently, defocus lenses generally have two prescriptions: one matches the wearer's visual acuity, and the other provides a fixed degree of defocus stimulation.

[0004] In the past two years, a type of myopia control glasses has appeared on the market, which uses Diffuse Optics Technology (DOT) to reduce the contrast of objects in the visual field. Numerous studies have shown that unnatural high-contrast signals, such as computer screens and books under bright light, can easily cause fatigue of cone cells and increase the elongation of the eye axis. Reducing environmental contrast is beneficial in slowing the progression of myopia; however, the contrast-reducing effect of typical myopia control glasses is highly dependent on ambient lighting conditions. When indoor lighting is weak, the degree of contrast reduction is significantly reduced.

[0005] Currently, some glasses incorporate myopia control technologies such as defocus and contrast control, but their mechanisms all depend on the external environment, and the defocus and contrast signals introduced during long-term wear are unstable. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to provide a multifunctional myopia prevention and control glasses, which combines active backlighting and multiple beam splitters to provide a variety of myopia prevention and control methods.

[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0008] A multifunctional myopia control glasses, comprising a myopia control system consisting of a composite lens and a light source, wherein the composite lens consists of a main lens and a beam splitter array embedded in the main lens;

[0009] The primary lens has a principal refractive power for correcting refractive errors in the human eye;

[0010] The main lens includes a central region and an edge region surrounding the central region; multiple beam splitters are embedded in the edge region and form the beam splitter array, the reflectivity of the beam splitter does not exceed 20%; the beam splitter array includes multiple beam splitters with different surface parameters, the surface of the beam splitter being one or more of a sphere, ellipsoid, plane, hyperboloid, and parabola;

[0011] The light source is positioned obliquely to the side of the main lens facing the human eye. The central normal of the light source passes through the center of the main lens. The light emitted by the light source is refracted by the inner surface of the main lens and then directed to each beam splitter. The beam splitter is reflected to the human eye. Each beam splitter is used to reflect the illumination light emitted by the light source to the human eye and provides competitive defocus, contrast reduction, or telescopic signals using different surface shapes.

[0012] Preferably, at least some of the beam splitters are ellipsoidal in shape, and the reflected light from each ellipsoidal beam splitter converges at a position no more than 10 mm from the inner surface of the lens, and is directed toward the human eye in a divergent manner, so as to introduce a myopia control light signal that reduces the contrast of the peripheral field of vision of the human eye.

[0013] Preferably, at least a portion of the beam splitter has a hyperboloid, spherical, or planar surface. The light reflected from this portion of the beam splitter is diverged to form a corresponding virtual scattering point located within 50mm outside the main lens. This is equivalent to the scattering point emitting divergent light that directly hits the human eye, thereby introducing a myopia control light signal that reduces the contrast of the peripheral field of vision of the human eye. The divergence of the scattered light is higher than that of the corrective light.

[0014] Preferably, some of the beam splitters in the beam splitter array have an ellipsoidal surface, and the reflected light from these beam splitters converges at a position more than 100mm from the inner surface of the lens to introduce a defocused myopia control light signal.

[0015] Preferably, some of the beams in the beam splitter array have parabolic surfaces, and the reflected light from these beams is directed toward the human eye in a parallel manner to form a telescopic signal.

[0016] Preferably, the aperture of the beam splitter is between 1 and 2 mm, and the spacing between the beam splitters is greater than the aperture of the beam splitter.

[0017] Preferably, the arrangement of the beam splitter array is selected from one or more of the following: circular arrangement, rectangular arrangement, or regular hexagonal arrangement.

[0018] Preferably, in the beam splitter array, one or more of the following are different: aperture, reflectivity, curvature, and spacing between adjacent beam splitters.

[0019] Preferably, in the main lens, at the intersection of the line connecting the image formed by the light source relative to the two sides of the main lens and the human eye with the inner and outer surfaces of the main lens, a surface area divided by the solid angle from the pupil to the image is not provided with a beam splitter, and an anti-reflection coating is provided on both sides of the surface in this area.

[0020] Preferably, a mask is formed on the light-emitting surface of the light source to restrict its light-emitting area, allowing only light that can reach the solid angle range of the beam splitter to be emitted.

[0021] The multifunctional myopia control glasses provided by this invention include a myopia control system composed of composite lenses and a light source. A beam splitter array is embedded in the edge region of the composite lenses, combined with a single light source positioned obliquely near the eye. Multiple beam splitters provide reflected light to the eye, and beam splitters of different shapes can provide light signals to achieve different myopia control effects. In bright outdoor environments, the light source can be turned off, functioning as ordinary glasses for vision correction; in low-light indoor environments, the light source can be turned on, transforming the glasses into multifunctional myopia control glasses. This allows the glasses to automatically switch between outdoor bright light and indoor low-light environments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the DOT optical path in the myopia control glasses provided by this utility model;

[0023] Figure 2 This is a schematic diagram of the defocused optical path in the myopia control glasses provided by this utility model;

[0024] Figure 3 This is a schematic diagram of the telescopic optical path in the myopia control glasses provided by this utility model;

[0025] Figure 4 This is a schematic diagram of the optical path of the myopia control glasses provided by this utility model, which combines defocus and DOT.

[0026] Figure 5 This is a schematic diagram showing the positions of the light source, the human eye, and the composite lens in the myopia control glasses provided by this utility model;

[0027] Figure 6 This is a schematic diagram showing the positional relationship between the normal vector of the beam splitter vertex and the light source, human eye, and main lens in the myopia control glasses provided by this utility model;

[0028] Figure 7 This is a schematic diagram of a cross-medium ray aiming process;

[0029] Figure 8(a) is a schematic diagram of a beam splitter with an ellipsoidal surface generating multi-point defocus signals;

[0030] Figure 8(b) is a schematic diagram of how a beam splitter with an ellipsoidal surface generates virtual DOT points and reduces contrast.

[0031] Figure 8(c) is a schematic diagram of how a beam splitter with a planar or hyperboloidal surface generates virtual DOT points and reduces contrast.

[0032] Figure 8(d) is a schematic diagram of a beam splitter with a parabolic surface generating an image at infinity to guide the relaxation of the human eye's lens;

[0033] Figures 9(a), 9(b), and 9(c) are schematic diagrams of three different arrangements of beam splitters:

[0034] Figure 10 This is a schematic diagram of a certain arrangement rule for beam splitters;

[0035] Figure 11 This is a schematic diagram illustrating how beam splitters with different curvatures control contrast by modulating light.

[0036] Figure 12 This is a schematic diagram of stray light paths that should be avoided in a myopia prevention and control system;

[0037] Figure 13 is a simulation effect diagram of the uniformity of incoming light signal of the myopia control glasses provided by this utility model: (a) retinal light distribution diagram with only contrast reduction effect; (b) retinal light distribution diagram with only defocus image; (c) retinal light distribution diagram with combined regulation of defocus and contrast reduction. Detailed Implementation

[0038] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Single-function myopia control lenses, based on different theories and construction methods, such as defocus lenses and DOT lenses, have been proven to have certain control effects. However, they are prone to developing drug resistance and being adapted by the human eye, which reduces their effectiveness. Furthermore, existing myopia control lenses directly process transmitted light and cannot adjust the use of myopia control function according to the environment. The multifunctional myopia control glasses provided by this utility model aim to generate different myopia control signals through beam splitters of different surface shapes. The myopia control system consists of a composite lens 1 and a light source 2. The composite lens 1 consists of a main lens 11 and a beam splitter array 12 embedded in the main lens. The main lens 11 has a principal refractive power for correcting refractive errors of the human eye. The main lens 11 includes a central region (preferably circular or elliptical, with a circular diameter between 5 and 10 mm) and an edge region surrounding the central region. The light from the center of the lens is only affected by the main lens itself, so that the human eye can see the image clearly and meet the correction requirements. Multiple beam splitters 13 are embedded in the edge region of the non-central region to form a beam splitter array. The reflectivity of each beam splitter does not exceed 20%. The multiple beam splitters have not completely consistent surface shape parameters and are used to reflect the light emitted by the light source 2, so that the reflected light is directed to the position of the human eye (i.e., a point on the central axis of the main lens 10 mm to 12 mm away from the inner surface of the main lens), becoming light signals with different imaging properties for the human eye. The light source 2 is positioned obliquely to the side of the main lens 11 near the human eye. The central ray of the light source 2 passes through the center of the main lens, so that the illumination range of the light source 2 covers the entire inner surface of the main lens 11, while avoiding obstruction of the light source by the human face. The light emitted by the light source is refracted by the inner surface of the main lens and then directed to each beam splitter 13, and reflected by each beam splitter 13 to the human eye.

[0040] Because each beam splitter in a beam splitter array has different surface parameters, by customizing different beam splitters, composite light signals can be achieved, thus enabling myopia control. For example, Figure 1-3 As shown, light reflected by beam splitters of different shapes can be used as light signals to reduce the contrast of the surrounding area, to defocus, or to telescope after entering the human eye.

[0041] Specifically, such as Figure 1 As shown, the reflected light rays 14A from some or all of the beam splitter 13A within the primary lens each strike the human eye with a divergence greater than that of the corrective light rays. These rays, upon entering the eye, reach the non-central region (i.e., peripheral region) of the retina in a defocused manner, thereby introducing a myopia control light signal that reduces the contrast of the peripheral visual field. For example... Figure 2 As shown, the reflected light rays 14B from some of the beam splitters 13B in the beam splitter array converge towards the human eye. These rays, upon entering the eye, converge in front of the retina to form a positive defocus image, thereby introducing a defocus myopia control light signal. For example... Figure 3As shown, the reflected light rays 14C from some of the beam splitters 13C in the beam splitter array are directed towards the human eye in a near-parallel manner, forming a telescopic signal. For refractive eyes, which inherently possess a certain optical power Φ, a hyperboloid can be used to shape the image at a certain distance l according to the required diopter. i =1000 / Φ. For example... Figure 4 As shown, the lens can provide multiple light signals simultaneously, for example, it can simultaneously adjust the contrast and defocus myopia control light signals.

[0042] This utility model also provides a method for forming the aforementioned multifunctional myopia control glasses, comprising the following steps: providing a main lens that matches the user's refractive power, the main lens being obtained using conventional methods such as those for producing corrective lenses, which are not limited in this utility model; setting a single light source at a predetermined position on the side of the main lens facing the user's eye to emit light onto the surface of the main lens facing the user's eye, the central light of the light source passing through the center of the main lens, the single light source being optionally placed in a wearing structure such as the temple for easy control; forming a beam splitter array around the central area in the non-central area of ​​the main lens, the beam splitter array comprising multiple beam splitters with different surface parameters, the surface of the beam splitter being one or more of a sphere, ellipsoid, plane, hyperboloid, and paraboloid; each beam splitter reflecting the illumination light emitted by the light source to the user's eye, and providing at least two light signals with different imaging properties to the user's eye according to a pre-set beam splitter shape, to provide multiple of the competitive defocus, contrast reduction, and telescopic signals. Among them, at least some of the beam splitters are ellipsoidal, hyperboloidal, spherical or planar in shape to provide a contrast-reduced signal; some beam splitters are ellipsoidal in shape to provide a competitive defocus signal, and / or some beam splitters are parabolic in shape to provide a telescopic signal.

[0043] Figure 5 The coordinate system for determining each beam splitter in the above composite lens is given. A three-dimensional rectangular coordinate system is established with the center of the main lens 11 as the origin and the visual axis direction as the X-axis (the outer direction of the lens is the positive axis).

[0044] The primary lens uses resin material as its base, typically a 70mm circle with a refractive index of 1.5–1.6. It provides myopia correction. The inner surface of the primary lens has a fixed curvature, preferably with a radius of curvature ranging from -500 to -100mm, where the negative sign indicates the curvature direction points towards the eye. The outer surface of the primary lens is determined according to the eye's corrective vision requirements. The primary lens includes a 5mm–10mm central region and an outer edge region. The central region is typically circular, and the edge region is typically an annular band. According to the design of this invention, multiple beam splitters 13 are embedded in the edge region, arranged according to certain rules or randomly densely packed. The beam splitters 13 are set at different angles to ensure that the light emitted from the light source 2, after being reflected by each beam splitter, points towards the pupil. At different lens positions, the light enters the eye at different incident angles, and each ray serves as a light signal with different imaging properties for the eye.

[0045] Light source 2 is located on the oblique side of the main lens 1 facing the inner surface, and the mounting position of light source 2 is on the temple of the eyeglasses. Figure 5 In the embodiment shown, the position of light source 2 is (x, y, z) = (10, 25, -10) (unit: mm). The human eye is positioned 10 mm in front of the lens, and its spatial relationship with the lens is as follows. Figure 4 As shown.

[0046] The light emission distribution centerline of light source 2 passes through the center of the lens and enters the main lens 11. After refraction on the inner surface of the lens and reflection by the beam splitter 13 in the edge region, the light enters the human eye and regulates the light signal received by the retina.

[0047] Among them, all beam splitters 13 follow certain arrangement rules, including but not limited to circular arrangement, rectangular arrangement, regular hexagonal arrangement, etc.; and such as Figure 6 As shown, the initial direction of the central normal vector of each beam splitter 13 is the angle bisector of the line connecting the light source to the center of the beam splitter and the line connecting the pupil of the human eye to the center of the beam splitter under normal wearing conditions. Then, considering the refractive effect of the inner surface of the main lens, the normal direction of the beam splitter is adjusted to ensure that the light emitted by the light source points to the human eye.

[0048] like Figure 6 As shown, for a beam splitter in a lens, its normal vector should point towards the angle bisector of the line connecting the light source to the beam splitter and the line connecting the human eye to the beam splitter. This ensures that the center of the light beam reflected by the beam splitter enters the human eye, and also ensures that the light beam will not fail to enter the eye when the human eye moves or rotates slightly relative to the lens. The direction of the normal vector is obtained by describing the three-dimensional coordinate rotation using Euler angles.

[0049] Due to the refraction of light by the inner surface of the lens, the vertex normal vector of the beam splitter cannot be simply determined by calculating the line connecting the light source, the beam splitter, and the human eye. A ray aiming technique is used to calculate the direction of the light ray emitted from the light source after refraction through the inner surface, incident on the vertex of the beam splitter. Ray aiming involves changing the vector of the light ray emitted from the light source, using the coordinate difference between the point of impact on the beam splitter and its vertex as the objective function, and iteratively solving using the secant method. The secant method is an algorithm that uses the difference of the objective function instead of the derivative to find a local optimum. It requires two initial values: the first initial value h0 is the original direction vector, and the second initial value h1 is the direction of the line connecting the light source directly to the beam splitter. The difference step size is scaled using a scaling factor. Figure 7 As shown. Ray tracing is performed for both cases, calculating the coordinate differences F0 and F1 between the landing point on the beam splitter and the origin. The new direction h = h1 - F1(h1 - h2) / (F1 - F2) is calculated. Through iteration, the ray direction that makes the ray coincide with the vertex at that point is finally found. Ray aiming is completed by calculating the x and y directions respectively. For the light path between the human eye and the beam splitter, a reverse light path is designed, and the same method is used for iterative calculation to finally obtain the incident and outgoing ray directions at the beam splitter, thereby calculating the tilt angle of the beam splitter.

[0050] The tilt angle of the beam splitter represents its orientation. Depending on the different surface shapes of the beam splitters, the combined effect of the light reflected from each splitter on the human eye can achieve different myopia control techniques. The surface shape of a beam splitter can be spherical, ellipsoidal, planar, hyperboloid, parabolic, etc. It is characterized using an off-axis quadratic surface, with curvature ranging from positive to negative. The surface shape expression is as follows:

[0051]

[0052] Where, k1 = 1 + ksin 2 ω, c represents curvature, k represents quadratic coefficient, and ω represents off-axis angle.

[0053] As shown in Figure 8(a), when the surface shape of the beam splitter is an ellipsoid, the curvature of the ellipsoid should be negative. When the radius of curvature is large (the first focal point of the ellipsoid is located at the center of the light source and the second focal point is located behind the pupil of the human eye), it is between -646 and -230 mm. The light reflected by the beam splitter is directed towards the location of the human eye in a converging manner (the convergence point is located at a position more than 100 mm away from the inner surface). After entering the human eye, it forms an image on the defocus surface in front of the retina. When it produces a small defocus (+3 to +8 D) relative to the normal corrected vision, the function of the beam splitter is to provide competitive myopia defocus light signals.

[0054] Figures 8(b) and 8(c) show several beam splitters corresponding to contrast reduction. When the beam splitter has an ellipsoidal surface with a small radius of curvature (see Figure 8(b), where the first focal point of the ellipsoid is located at the center of the light source and the second focal point is located at the virtual dot point in front of the pupil), or when it is a plane or hyperboloid (see Figure 8(c)), the light source is imaged near the front and back of the lens. The function of the beam splitter can be approximated by the dot diffusion surface of contrast-enhancing myopia control glasses. In this case, the function of the beam splitter is to actively reduce contrast. As shown in Figure 8(b), when the beam splitter has an ellipsoidal surface (the first focal point of the ellipsoid is located at the center of the light source and the second focal point is located at the virtual dot point in front of the pupil) and a small radius of curvature, for example, between -8 and -2 mm, the light reflected by the beam splitter converges within a range of no more than 10 mm from the inner surface of the main lens facing the eye to form a virtual scattering point. Then, it is directed towards the eye as scattered light and forms defocus on the retina to uniformly reduce the contrast in the peripheral area of ​​the retina. As shown in Figure 8(c), when the surface of the beam splitter is a plane or a hyperboloid, the light source is imaged at a certain distance from the outer surface of the lens (away from the eye). For example, the light emitted from the beam splitter converges at a distance of 12-20 mm in front of the eye (i.e., a distance of no more than 10 mm from the surface of the lens away from the eye). At this time, the eye cannot focus on the image. The light reflected by the beam splitter is directed towards the location of the eye in a divergent manner and forms a defocused effect on the retina, providing a light signal with reduced contrast.

[0055] As shown in Figure 8(d), when the beam splitter has a parabolic surface, the focal point of the parabolic surface is located at the center of the light source, and the light source is imaged at infinity. The light reflected by the beam splitter is directed towards the location of the human eye in a near-parallel manner. For a human eye with refractive errors, it forms slightly divergent light that enters the human eye, forming a ring-shaped distant image that stimulates the human eye. At this time, the function of the beam splitter is to provide a light signal to guide the human eye to relax when looking at distant objects, and to promote intermittent rest when focusing on near objects for a long time.

[0056] The functions corresponding to different face shapes are shown in Table 1. By rationally allocating the face shape and curvature of different areas, a multifunctional myopia control glasses system can be constructed that integrates multiple myopia prevention theories and can be actively adjusted by the user regardless of environmental influences.

[0057] Table 1 Correspondence between Reflective Surface Types and Functions

[0058]

[0059] Table 1. Functions Achieved by Different Beam Spectrum Surface Types

[0060] In the case of contrast-enhanced myopia control glasses, the surface used is simplified from a quadratic surface to a sphere, which can still achieve the desired effect. Spheres with different curvatures can image the DOT point at different locations, creating varying degrees of scattering effects.

[0061] The reflectivity of the beam splitter should be low, minimizing its impact on normal vision while directing light into the eye. The reflectivity should not exceed 20%, ideally controlled between 5% and 15%. To ensure a reasonable density and area ratio of the beam splitters, their size should be controlled within 1mm to 2mm in diameter, and the aperture size should be smaller than the spacing between them.

[0062] Since the light source emits light within a certain solid angle, for a beam splitter of the same size, the farther away from the light source, the smaller the luminous flux it receives and the less energy is reflected into the eye. This results in a non-uniform signal that is much greater in the area closer to the light source than in the area farther away from the light source, which greatly affects visual comfort.

[0063] The illuminance E received by the beam splitter can be calculated using the following formula: E = I·cosθ / r 2 This means that illuminance E is inversely correlated with the square of the distance r, where I represents the luminous flux of the light source and θ represents the tilt angle of the receiving surface. Therefore, subsequent control of illuminance can utilize this proportional relationship, setting its distribution to depend on the square of the distance from the beam splitter to the light source, thereby calculating the influence factor α. i :

[0064]

[0065] Where, r i This represents the distance from each beam splitter to the light source, and the squares of these distances are normalized to a scaling factor α by summing them. i .

[0066] The arrangement of beam splitters follows certain rules to ensure approximate uniformity, allowing a sufficiently large area of ​​control signal to enter the eye from different directions. The arrangement rules can follow circular, rectangular, or regular hexagonal patterns, etc. Figure 9(a) , 9(b) As shown in 9(c).

[0067] To ensure uniform illumination of the incoming light signal, the received illumination can be altered by modifying the aperture, arrangement density, reflectivity, and curvature of the beam splitters. In a beam splitter array, one or more of the following parameters may differ: aperture, reflectivity, curvature, and spacing between adjacent beam splitters.

[0068] For beam splitters farther from the light source, a larger aperture results in more reflected light energy. Provided the aperture does not exceed the beam splitter spacing, a scaling factor α, related to the square of the distance, can be used.i To change the aperture distribution d of the i-th beam splitter i =α i max(d i To correct for illuminance, the maximum beam splitter aperture is max(d). i () refers to the aperture of the beam splitter furthest from the light source.

[0069] Changing the arrangement density of the beam splitters can also control the illuminance returned to the human eye by all beam splitters within a certain area. For areas farther away from the light source, the denser the arrangement of the beam splitters, the more light energy can be reflected back, using the aforementioned scaling factor α. i By changing the beam splitters distributed within a circle of the same radius, the distance Δ between the i-th beam splitter and the next beam splitter... i =α i max(Δ i This is used to correct the illuminance of the area, where the maximum beam splitter spacing is max(Δ). i This refers to the spacing between the beam splitters closest to the light source. Preferably, to ensure a more regular arrangement of the beam splitters, they are still required to be arranged on concentric rings, but with a non-uniform arrangement along their tangents. This changes the area ratio of the beam splitters in different areas, ensuring uniform illumination of the incoming light signal. The arrangement follows a regular pattern. Figure 10 As shown.

[0070] Furthermore, the illuminance received by the beam splitter can be controlled by altering its reflectivity. The farther the beam splitter is from the light source, the greater its reflectivity, and the more light energy it can reflect back. For example, provided the maximum reflectivity does not exceed 15%, the aforementioned scaling factor α can be used... i Change the reflectivity β of the i-th beam splitter i =α i max(β i To correct for illuminance, the maximum reflectance is max(β). i () refers to the reflectivity of the beam splitter furthest from the light source.

[0071] Specifically, in the case of DOT myopia control glasses, the received illuminance can also be adjusted by changing the radius of curvature of the beam splitter. For example... Figure 11As shown, changing the curvature of the beam splitter alters the distance between the virtual DOT point and the human eye, and changes the solid angle of the human pupil relative to the virtual DOT point, thus controlling the illuminance. The surface shapes of the beam splitters can be distributed from the ear side to the nose side in the order of planar, convex, concave with large curvature, and concave with small curvature. When the beam splitter has negative curvature and a small curvature, its surface is concave, and the virtual DOT point is imaged on the side of the lens closest to the human eye, resulting in concentrated illuminance. When the beam splitter has negative curvature and a large curvature, its surface is concave, and the virtual DOT point is imaged on the side of the lens closest to the human eye, resulting in diffused illuminance and less energy received by the human eye. When the beam splitter has positive curvature, its surface is convex, and the virtual DOT point is imaged on the side of the lens furthest from the human eye, but close to the lens. When the light intensity is severely diffused, less energy is received by the human eye. When the beam splitter is planar, the virtual DOT point is imaged on the side of the lens furthest from the eye and further away from the lens itself. In this case, the light intensity diffusion is reduced compared to a convex surface, and more energy is received by the human eye. The further the beam splitter is from the light source, the smaller its curvature, making the light diffusion into the human eye less noticeable. Conversely, the closer the beam splitter is to the light source, the greater its curvature, and the more significant its beam diffusion, thus reducing the energy entering the human eye and achieving uniform light intensity at different positions on the lens. Using the scaling factor α mentioned above... i Change the curvature c of the i-th beam splitter i =α i max(c i To correct for illuminance, the maximum curvature of the beam splitter is max(c). i () refers to the curvature of the beam splitter closest to the light source.

[0072] In particular, such as Figure 12 As shown, considering that the light source itself will be reflected by the inner and outer surfaces of the lens, forming stray light in the human eye and interfering with normal vision, in this case, the surface area defined by the solid angle from the pupil to the image at the intersection of the line connecting the image of the light source relative to the two sides of the main lens and the human eye with the inner and outer surfaces of the main lens (see...) Figure 12 In the inner and outer surface reflection areas shown, no beam splitter is placed, and antireflective coatings are applied to both sides of these areas. Similarly, using the chord-intercept method for ray aiming, the intersection point of the light emitted from the light source, reflected from the front and rear surfaces of the primary lens, and the primary lens itself is obtained. At this point, an antireflective coating is applied to a lens area that covers the size of the human pupil to prevent the light source from being directly and completely reflected into the eye; simultaneously, no beam splitter is placed in this area. Alternatively, a mask can be placed in front of the light source to restrict its luminous area, allowing only light reaching the solid angle range of the beam splitter to exit, thereby avoiding the formation of the aforementioned reflected image and the introduction of strong stray light.

[0073] After beam splitter adjustment, the non-uniform signal caused by different illuminance received by the beam splitter due to unequal distances to the light source can be transformed into a more uniform signal. The illuminance distribution captured on the retina after adjustment is shown in Figure 13(a). It can be seen that, except for the central normally light-transmitting area and the removed area (preferably coated with an anti-reflection film), the overall distribution is relatively uniform, and there is no non-uniform intensity variation related to the square of the distance to the light source. In addition, the adjustment of the defocused image achieved by the method proposed in this invention is shown in Figure 13(b). For defocused glasses, a certain amount of image detail is required for the human eye to recognize the defocus signal, so the light source is the screen displaying a cross. Figure 4 As shown in Figure 13(c), when the lens is designed to have both defocus and contrast reduction functions, the light field modulation result on the retina is shown in Figure 13(c).

[0074] The above provides a detailed description of the three myopia control methods of the multifunctional myopia control glasses provided by this utility model. Based on the technology of this utility model, the three myopia control methods can be integrated, different functions can be achieved by dividing different areas on the lens, or multiple beam splitters can be used in combination without dividing the lens to form multifunctional active myopia control glasses.

[0075] The following is a specific embodiment of the multifunctional myopia control glasses provided by this utility model. Resin material is used as the base of the main lens to provide the primary myopia correction power. The resin lens contains a circularly arranged array of beam splitters. Within a 10mm diameter area at the center of the main lens, there are no beam splitters; light is only affected by the lens itself, resulting in a clear image. Beam splitters are distributed only in the peripheral area outside the central area, deflecting light rays incident from the oblique side of the lens, ensuring they enter the pupil evenly. Some beam splitters are ellipsoidal, with the first focal point located at the center of the light source and the second focal point located 333mm behind the pupil. Currently, wearers have added 3D defocus to their existing myopia. Some beam splitters use an ellipsoidal surface, with the first focal point located at the center of the light source and the second focal point located 7mm in front of the pupil. This is equivalent to forming a virtual DOT lens at that point, creating a large number of virtual scattering points. Light originates from these virtual scattering points and enters the eye from different angles, reducing the contrast of each angle. Other beam splitters use a parabolic surface, with the focal point located at the center of the light source. The beam enters the eye almost parallel to the light source, creating a ring-shaped distant image to guide the eye to look into the distance, stimulating the eye and promoting intermittent rest during long-term focusing on near objects.

[0076] In summary, the multifunctional myopia control glasses provided by this invention are electronic lenses with a built-in light source. The main lens has a principal refractive power for correcting refractive errors, and the edge area of ​​the main lens includes at least several beam splitters. These beam splitters themselves have low reflectivity, minimizing their impact on direct vision from the external environment. Light emitted from a light source located obliquely to the side of the lens is reflected by the beam splitters and enters the eye, thus providing multiple functions for defocusing, reducing contrast, and enabling telescopic vision. Furthermore, in bright outdoor environments, the light source can be turned off, functioning as ordinary glasses for only refractive correction; in low-light indoor environments, the light source can be turned on, transforming the glasses into multifunctional myopia control glasses. This allows the glasses to be freely and actively switched between bright outdoor and low-light indoor environments.

[0077] The above provides a detailed description of the multifunctional myopia control glasses provided by this utility model. For those skilled in the art, any obvious modifications made to this utility model without departing from its essential content will constitute an infringement of the patent rights of this utility model and will incur corresponding legal liabilities.

Claims

1. A multifunctional myopia control glasses, characterized in that, It includes a myopia control system consisting of a composite lens and a light source, wherein the composite lens consists of a main lens and a beam splitter array embedded in the main lens; The primary lens has a principal refractive power for correcting refractive errors in the human eye; The main lens includes a central region and an edge region surrounding the central region; multiple beam splitters are embedded in the edge region and form the beam splitter array, the reflectivity of the beam splitter does not exceed 20%; the beam splitter array includes multiple beam splitters with different surface parameters, the surface of the beam splitter being one or more of a sphere, ellipsoid, plane, hyperboloid, and parabola; The light source is positioned obliquely to the side of the main lens facing the human eye. The central normal of the light source passes through the center of the main lens. The light emitted by the light source is refracted by the inner surface of the main lens and then directed to each beam splitter. The beam splitter is reflected to the human eye. Each beam splitter is used to reflect the illumination light emitted by the light source to the human eye and provides competitive defocus, contrast reduction, or telescopic signals using different surface shapes.

2. The multifunctional myopia control glasses as described in claim 1, characterized in that, At least some of the beam splitters are ellipsoidal in shape. The reflected light from each ellipsoidal beam splitter converges at a position no more than 10 mm from the inner surface of the lens and is directed toward the human eye in a divergent manner, so as to introduce a myopia control light signal that reduces the contrast of the peripheral field of vision of the human eye.

3. The multifunctional myopia control glasses as described in claim 1, characterized in that, At least part of the beam splitter has a hyperboloid, spherical, or flat surface. The light reflected from this part of the beam splitter is diverged to form a corresponding virtual scattering point located within 50mm outside the main lens. This is equivalent to the scattering point emitting divergent light that is directly directed at the human eye, thereby introducing a myopia control light signal that reduces the contrast of the peripheral field of vision of the human eye. The divergence of the scattered light is higher than that of the corrective light.

4. The multifunctional myopia control glasses as described in claim 1, 2, or 3, characterized in that, The beam splitter array has an ellipsoidal surface, and the reflected light from the beam splitter converges at a position more than 100mm from the inner surface of the lens to introduce a defocused myopia control light signal.

5. The multifunctional myopia control glasses as described in claim 1, 2, or 3, characterized in that, Some of the beamsplitters in the beam splitter array have parabolic surfaces. The reflected light from these beams is directed toward the human eye in a parallel manner, forming a telescopic signal.

6. The multifunctional myopia control glasses as described in claim 1, characterized in that: The aperture of the beam splitter is between 1 and 2 mm, and the spacing between the beam splitters is greater than the aperture of the beam splitter.

7. The multifunctional myopia control glasses as described in claim 1, characterized in that: The arrangement of the beam splitter array is selected from one or more of the following: circular arrangement, rectangular arrangement, or regular hexagonal arrangement.

8. The multifunctional myopia control glasses as described in claim 1, characterized in that: In a beam splitter array, each beam splitter has one or more differences in its aperture, reflectivity, curvature, and the spacing between adjacent beam splitters.

9. The multifunctional myopia control glasses as described in claim 1, characterized in that: In the main lens, the surface area defined by the solid angle from the pupil to the image at the intersection of the line connecting the image formed by the light source relative to the two sides of the main lens and the human eye with the inner and outer surfaces of the main lens does not have a beam splitter, and anti-reflection coatings are provided on both sides of this area.

10. The multifunctional myopia control glasses as described in claim 9, characterized in that: A mask is formed on the light-emitting surface of the light source to restrict its light-emitting area, allowing only light that can reach the solid angle range of the beam splitter to exit.

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