Lens based 3d disordered microstructure partitioning to control point spread for inhibition of axial elongation

Abstract

The lens for inhibiting axial elongation based on 3D disordered microstructure partition regulation point diffusion belongs to the technical field of eye optics and myopia prevention and control, and comprises a lens base and a disordered dynamic microstructure layer arranged on the lens base; the inner surface of the lens base is processed with a point diffusion function, the disordered dynamic microstructure layer comprises a plurality of microstructure units arranged in a non-periodic manner in space, and the microstructure units modulate and scatter incident light to regulate the point diffusion function of the imaging of the inner surface of the lens; the optical properties of the microstructure units can dynamically change in response to external stimulation, so that the form of the point diffusion function of the inner surface of the lens dynamically adjusts to provide a dynamic stimulation signal for inhibiting axial elongation to the retina. By introducing the disordered dynamic microstructure, the point spread function (PSF) of the incident light is intelligently regulated, a dynamic, non-periodic and optimized light signal distribution is formed at the periphery of the retina, and the axial elongation is more effectively inhibited.

Description

Technical Field

[0001] This utility model relates to a lens based on 3D disordered microstructure partitioning and point diffusion control to suppress axial elongation, belonging to the field of optometry and myopia control technology. Background Technology

[0002] Currently, mainstream myopia control optical technologies (such as defocus lenses, multifocal contact lenses, and dot diffusion lenses) are mostly based on 2D static and ordered optical designs, such as forming fixed positive and negative focal power defocus zones around the lens periphery, or dot diffusion. While these technologies have some effect, they also have limitations:

[0003] 1. Poor adaptability: The static design cannot adapt to dynamic scenarios such as eye movement, focusing, and changes in ambient light, which may lead to signal weakening or interruption.

[0004] 2. Tolerance: In some patients, the brain gradually "adapts" to this fixed visual noise, causing the prevention and control effect to decline over time.

[0005] 3. Visual disturbance: Strong, orderly out-of-focus patterns can sometimes cause discomfort such as glare and dizziness.

[0006] Axial length elongation is the root cause of myopia development. Studies have shown that the retina not only senses visual clarity but also resolves optical aberrations (i.e., the morphology of the photosensitive element) and regulates the growth and development of the eyeball accordingly.

[0007] Therefore, there is an urgent need to propose lenses and manufacturing methods based on the 3D disordered microstructure partitioning and point diffusion regulation to suppress axial elongation, and to provide a more intelligent, dynamic, and low-interference method to provide a continuous suppression signal in order to solve the above-mentioned technical problems. Utility Model Content

[0008] The purpose of this invention is to provide an optical lens that can dynamically respond to visual behavior and provide efficient and comfortable myopia control signals. This lens, by introducing a disordered dynamic microstructure, intelligently modulates the point spread function (PSF) of incoming light, forming a dynamically changing, non-periodic, and optimized light signal distribution around the retina, thereby more effectively inhibiting axial elongation. A brief overview of this invention is provided below to offer a basic understanding of certain aspects of it. It should be understood that this overview is not an exhaustive summary of the invention. It is not intended to identify key or essential parts of the invention, nor is it intended to limit the scope of the invention.

[0009] The technical solution of this utility model:

[0010] A lens based on 3D disordered microstructure partitioning to regulate point spread and suppress axial elongation includes a lens substrate and a disordered dynamic microstructure layer disposed on the lens substrate. The inner surface of the lens substrate is processed with a point spread function. The disordered dynamic microstructure layer contains multiple microstructure units arranged non-periodically in space, which modulate and scatter incident light to regulate the point spread function of the image formed on the inner surface of the lens. The optical properties of the microstructure units can dynamically change in response to external stimuli, thereby dynamically adjusting the morphology of the point spread function on the inner surface of the lens to provide a dynamic stimulus signal to the retina for suppressing axial elongation.

[0011] Preferably, the lens substrate is divided into a central optical zone for providing clear central vision and refractive correction, and a peripheral treatment zone surrounding the central optical zone, wherein the disordered dynamic microstructure layer is disposed within the peripheral treatment zone.

[0012] Preferably, the spatial arrangement of the microstructure units is random or quasi-random.

[0013] Preferably, the microstructure unit is a microlens or a microdiffraction element.

[0014] Preferably, the external stimulus includes at least one of light stimulation, temperature stimulation, or electrical stimulation.

[0015] Preferably, in response to light stimulation, the microstructure unit is made of a material containing photochromic or photodeformable molecules, and its morphology or refractive index can change with the intensity or wavelength of ambient light.

[0016] Preferably, in response to temperature stimulation, the microstructure unit is made of a thermosensitive material, and its morphology or refractive index can change with changes in ambient temperature or body temperature.

[0017] Preferably, in response to electrical stimulation, the optical lens further includes an embedded microelectrode, the microstructure unit comprising liquid crystal material, and an electric field is applied through the microelectrode to change the orientation of the liquid crystal molecules, thereby achieving dynamic adjustment of the optical properties of the microstructure unit.

[0018] Preferably, the disordered dynamic microstructure layer is integrated into the surface or interior of the lens substrate in the peripheral treatment area by embedding, writing, or lamination.

[0019] This utility model has the following beneficial effects:

[0020] 1. The dynamic response of this invention ensures a continuous supply of suppression signals in various eye-use scenarios, theoretically resulting in better prevention and control effects and higher efficiency;

[0021] 2. The disordered structure of this utility model avoids visual interference from fixed patterns, resulting in higher wearing comfort;

[0022] 3. This utility model can automatically adjust the signal strength according to ambient light and other conditions, realizing "on-demand" treatment, making it more intelligent;

[0023] 4. This utility model combines dynamic materials with disordered optical design, representing the development direction of the next generation of myopia prevention and control technology. Attached Figure Description

[0024] Figure 1 This is a schematic diagram showing the fit between the lens substrate and the microstructure unit;

[0025] Figure 2 This is a schematic diagram showing the interaction between the microstructure unit and the point diffusion function of the inner surface of the lens;

[0026] In the figure, 1-lens substrate, 2-microstructure unit. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the present utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0028] Specific implementation method one: Combining Figure 1 This embodiment describes a lens based on 3D disordered microstructure partitioning to regulate point spread and suppress axial elongation. It includes a lens substrate 1 and a disordered dynamic microstructure layer disposed on the lens substrate 1. The inner surface of the lens substrate 1 is processed with a point spread function. The disordered dynamic microstructure layer contains multiple microstructure units 2 arranged non-periodically in space, which modulate and scatter incident light to regulate the point spread function of the image on the inner surface of the lens. The optical properties of the microstructure units 2 can dynamically change in response to external stimuli, thereby dynamically adjusting the morphology of the point spread function on the inner surface of the lens to provide a dynamic stimulation signal to the retina for suppressing axial elongation.

[0029] The lens substrate 1 is made of high-transmittance polycarbonate (PC) material, with its front surface being spherical or aspherical, and its rear surface precisely designed according to the wearer's refractive error (e.g., -3.00D myopia) to provide accurate refractive correction. The lens substrate is divided into: a central optical zone for providing clear central vision and refractive correction, and a peripheral treatment zone surrounding the central optical zone, with the disordered dynamic microstructure layer disposed within the peripheral treatment zone.

[0030] The central optical zone is a circular area with a diameter of 7 mm centered on the geometric center of the lens. This area has no microstructures, maintaining the high light transmittance of the polycarbonate substrate itself (transmittance >99%). Its sole function is to ensure that objects directly in front of the wearer's line of sight can be clearly and without distortion focused on the fovea of ​​the retina, guaranteeing clear central near and far vision.

[0031] The peripheral treatment zone surrounds the central optical zone and extends to the edge of the lens. Myopia control is primarily achieved in this area.

[0032] The disordered dynamic microstructure layer is disposed within the surrounding treatment area.

[0033] The microstructure unit 2 is a microlens or a microdiffraction element.

[0034] The external stimulus includes at least one of light stimulation, temperature stimulation, or electrical stimulation.

[0035] In response to light stimulation, the microstructure unit 2 is made of a material containing photochromic or photodeformable molecules, and its morphology or refractive index can change with the intensity or wavelength of ambient light.

[0036] In response to temperature stimulation, the microstructure unit 2 is made of a thermosensitive material, and its morphology or refractive index can change with changes in ambient temperature or body temperature.

[0037] In response to electrical stimulation, the optical lens also includes embedded microelectrodes, the microstructure unit comprising liquid crystal material, and an electric field is applied through the microelectrodes to change the orientation of the liquid crystal molecules, thereby achieving dynamic adjustment of the optical properties of the microstructure unit.

[0038] The disordered dynamic microstructure layer is integrated into the surface or interior of the lens substrate in the peripheral treatment area by embedding, inscription, or lamination.

[0039] In response to temperature stimuli, the microstructure unit 2 described in this embodiment is made of a thermosensitive material, whose morphology or refractive index can change with changes in ambient temperature or body temperature. For example, the microstructure layer is composed of a methyl methacrylate (PMMA) polymer material doped with photochromic molecules (such as spiropyran compounds), and is bonded to the lens substrate 1 through a nanoimprinting process. Its dynamic characteristics are achieved through a photoresponse mechanism. The photochromic molecules in the methyl methacrylate (PMMA) polymer material are sensitive to the intensity of visible light (especially blue-violet light) of different wavelengths.

[0040] The functional unit of the microstructure unit 2 is a microlens. Each microlens is a circular convex structure with a diameter randomly distributed between 30 and 80 micrometers and a maximum height of 10 micrometers.

[0041] The microlenses are arranged completely randomly within the surrounding treatment area. Their positional coordinates are determined by a random number sequence generated by a computer algorithm, ensuring that the distribution of microlenses within any 1 mm² area exhibits no periodic pattern. This non-periodic, disordered design results in an unpredictable scattering pattern of incident light, effectively avoiding adaptation and fixed visual interference from the brain, such as glare or dizziness.

[0042] Specific Implementation Method Two: Combining Figure 1 This embodiment, based on specific embodiment one, describes a lens fabrication method for suppressing axial elongation by controlling point diffusion through 3D disordered microstructure partitioning, comprising the following steps:

[0043] A lens substrate is provided. In this embodiment, a liquid crystal elastomer (LCE) prepolymer solution, a thermosensitive material with good light transmittance and biocompatibility, is selected as the substrate. This material itself possesses thermally induced deformation properties after curing.

[0044] The disordered dynamic microstructure layer is formed on the lens substrate;

[0045] The process for forming the disordered dynamic microstructure layer includes one of nanoimprinting technology, femtosecond laser direct writing technology, or self-assembly technology.

[0046] This embodiment uses femtosecond laser direct writing technology to directly process and form a microstructure layer inside the lens substrate, as detailed below:

[0047] First, the LCE prepolymer solution is injected into a flat circular mold and pre-cured by preliminary ultraviolet light to form a transparent, somewhat elastic solid substrate sheet.

[0048] Then, the aforementioned substrate sheet is fixed onto the worktable of the femtosecond laser direct writing processing platform. Based on a pre-designed three-dimensional model file (which defines a quasi-randomly arranged array of micro-diffraction elements, such as microprism structures, within the treatment area surrounding the lens), the control system manipulates the femtosecond laser focus to perform a three-dimensional scan inside the substrate.

[0049] Femtosecond laser direct writing process: The ultrafast laser undergoes a multiphoton absorption effect at the focal point, inducing a selective polymerization reaction in the LCE prepolymer, thereby forming a solidified microstructure along the laser scanning trajectory. By precisely controlling the laser energy, scanning speed, and focal point position, microstructure units with precise shapes and orientations can be inscribed at a specific depth inside the substrate, while the surrounding areas not irradiated by the laser remain in an unpolymerized state.

[0050] Finally, the entire substrate is cured as a whole, ensuring that even the unwritten areas are completely cured, forming a robust lens substrate 1 that is integrated with the laser-written microstructure areas. At this point, the disordered dynamic microstructure layer is embedded and becomes an inseparable part of the lens substrate.

[0051] After curing, the lens is ground and polished to achieve the required optical precision.

[0052] Since the microstructure layer is embedded in the substrate, no additional lamination step is required. The lens is then subjected to routine post-processing: a hardening coating is applied to its outer surface to increase abrasion resistance, and an anti-reflective coating is applied to reduce surface reflection, thereby improving light transmittance and visual comfort.

[0053] The lens obtained through this embodiment has internal microstructure units 2 composed of thermosensitive LCE material, which can deform in response to minute changes in ambient temperature or body temperature, thereby dynamically adjusting its optical properties and achieving dynamic temperature response control. The lens prepared by this method has strong structural integrity and excellent durability.

[0054] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be arranged and combined. Those skilled in the art can exhaust all possibilities based on the mathematical knowledge of permutation and combination. Therefore, this utility model will not describe the technical solutions after permutation and combination one by one, but it should be understood that the technical solutions after permutation and combination have been disclosed by this utility model.

[0055] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lens based on 3D disordered microstructure partitioning to regulate point diffusion and suppress axial elongation, characterized in that: It includes a lens substrate (1) and a disordered dynamic microstructure layer disposed on the lens substrate (1); the inner surface of the lens substrate (1) is processed with a point spread function, and the disordered dynamic microstructure layer contains multiple microstructure units (2) arranged non-periodically in space to modulate and scatter incident light to regulate the point spread function of the image on the inner surface of the lens; the optical properties of the microstructure unit (2) can change dynamically in response to external stimuli, thereby dynamically adjusting the morphology of the point spread function on the inner surface of the lens.

2. The lens according to claim 1, which uses 3D disordered microstructure partitioning to regulate point diffusion and suppress axial elongation, is characterized in that: The lens substrate is divided into: a central optical zone for providing clear central vision and refractive correction, and a peripheral treatment zone surrounding the central optical zone, wherein the disordered dynamic microstructure layer is disposed within the peripheral treatment zone.

3. The lens according to claim 2, which uses 3D disordered microstructure partitioning to regulate point diffusion and suppress axial elongation, is characterized in that: The spatial arrangement of the microstructure unit (2) is random or quasi-random.

4. The lens according to claim 1, which uses 3D disordered microstructure partitioning to regulate point diffusion and suppress axial elongation, is characterized in that: The microstructure unit (2) is a microlens or a micro-diffraction element.

5. The lens according to claim 1, which uses 3D disordered microstructure partitioning to regulate point diffusion and suppress axial elongation, is characterized in that: The external stimulus includes at least one of light stimulation, temperature stimulation, or electrical stimulation.

6. The lens according to claim 5, which uses 3D disordered microstructure partitioning to regulate point diffusion and suppress axial elongation, is characterized in that: In response to light stimulation, the microstructure unit (2) is a microlens or microdiffraction element made of a material containing photochromic or photodeformable molecules.

7. The lens according to claim 5, which uses 3D disordered microstructure partitioning to regulate point diffusion and suppress axial elongation, is characterized in that: In response to temperature stimulation, the microstructure unit (2) is a microlens or microdiffraction element made of a thermosensitive material.

8. The lens according to claim 5, which uses 3D disordered microstructure partitioning to regulate point diffusion and suppress axial elongation, is characterized in that: In response to electrical stimulation, it also includes embedded microelectrodes, the microstructure unit comprising microlenses or microdiffraction elements made of liquid crystal material.

9. The lens according to claim 2, which uses 3D disordered microstructure partitioning to regulate point diffusion and suppress axial elongation, is characterized in that: The disordered dynamic microstructure layer is integrated into the surface or interior of the lens substrate in the peripheral treatment area by embedding, inscription, or lamination.

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