A progressive lens and eyeglasses

Abstract

The application discloses a kind of progressive lenses and glasses, progressive lenses include: lens body, and microstructure region is set on lens body, microstructure region includes multiple microscale optical structures, each microscale optical structure can generate high frequency and low amplitude optical distortion signal;Microstructure region at least covers the astigmatic region of progressive lenses, the frequency of optical distortion signal is higher than the frequency of astigmatic signal of astigmatic region, and the amplitude of optical distortion signal is lower than the amplitude of astigmatic signal.Therein, since the low frequency, large scale distortion of lens body itself generates strong light flow disturbance in dynamic vision, leading to brain to be explained as environmental movement, and further, in the application, by increasing the microstructure region of high frequency, low amplitude on lens, so that the wearer produces adaptability to high frequency subtle signal, to cover or break the regular light flow generated by low frequency distortion, so that brain is difficult to detect the overall slow distortion, thereby weakening the discomfort brought by surge effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical technology, and in particular to a progressive lens and glasses. BACKGROUND

[0002] Progressive addition lenses (PAL) provide simultaneous distance and near vision correction for the wearer by offering a continuous power transition from the upper distance vision zone to the lower near vision zone on the same lens. However, this power progression inevitably introduces astigmatism and distortion at the lens periphery. When the wearer rotates the eye or the head while wearing a PAL, the wearer often experiences a “swim” or “wobble” of the peripheral scene as the line of sight passes through different regions of the lens, which is known as the “swim effect”. This dynamic distortion can cause visual instability and, in severe cases, dizziness or discomfort, which is a major reason why many first-time PAL wearers have difficulty adapting.

[0003] In the related art, in order to solve the above problems, PAL manufacturers usually try to minimize the peripheral distortion by methods such as free-form surface optimization design, increasing the optical center zone, dividing multiple optical zones and smoothing the transition. Although these methods do indeed alleviate the swim effect, due to the inherent contradiction between power progression and large field of view, the effect of alleviating the swim effect is not satisfactory. When the wearer quickly turns his head or scans the line of sight across the lens edge, the residual low-frequency, large-scale distortion will still cause a significant distortion of the field of view. SUMMARY

[0004] The present application provides a progressive lens and glasses to solve the swim effect of the wearer wearing a progressive addition lens in the related art, and the discomfort caused to the wearer.

[0005] According to an aspect of the present application, a progressive lens is provided, comprising: a lens body, and a microstructure region provided on the lens body, the microstructure region comprising a plurality of microscale optical structures, each of the microscale optical structures being capable of generating an optical distortion signal with high frequency and low amplitude, the microstructure region covering at least an astigmatism region of the progressive lens, the frequency of the optical distortion signal being higher than the frequency of an astigmatism signal of the astigmatism region, and the amplitude of the optical distortion signal being lower than the amplitude of the astigmatism signal.

[0006] Optionally, each of the microscale optical structures comprises at least one of a microlens array, a microtexture structure, a random microlens structure or a random speckle structure.

[0007] Optionally, when the microscale optical structure is a microlens array, the size of the microlenses in the microlens array is 0.1mm-2mm.

[0008] Optionally, the microlenses in the microlens array are arranged in one of a regular arrangement or a random arrangement.

[0009] When the microlenses in the microlens array are arranged regularly, the microlens array forms a compound eye structure or a honeycomb structure.

[0010] When the microlenses in the microlens array are arranged randomly, the microlenses in the microlens array are of random shape.

[0011] Optionally, when the micro-scale optical structure is a micro-texture structure, the micro-texture structure is of at least one of a wave shape, a stripe shape or a dot shape.

[0012] Optionally, the micro-structured region is further arranged in a parafoveal region of the progressive lens.

[0013] The structure density of the micro-structured region in the astigmatic region is greater than the structure density of the micro-structured region in the parafoveal region, and / or the perturbation amplitude of the micro-structured region in the astigmatic region is higher than the perturbation amplitude of the micro-structured region in the parafoveal region.

[0014] Optionally, the micro-structure in the parafoveal region is a regular micro-texture structure, and the micro-structure in the astigmatic region is a random microlens array.

[0015] Optionally, the amplitude of the optical distortion signal generated by each of the micro-scale optical structures in the micro-structured region is such that the local refractive power perturbation is controlled at a refractive power level of ±0.75D.

[0016] Optionally, the micro-structured region is further arranged in a distance vision region and a near vision region of the progressive lens.

[0017] The micro-structure density in the micro-structured region in the distance vision region is less than the micro-structure density in the micro-structured region in the near vision region; and / or the perturbation amplitude in the micro-structured region in the distance vision region is less than the perturbation amplitude in the micro-structured region in the near vision region.

[0018] The micro-structure density in the micro-structured region in the near vision region is less than the micro-structure density of the micro-structured region in the parafoveal region; and / or the perturbation amplitude in the micro-structured region in the near vision region is less than the perturbation amplitude of the micro-structured region in the parafoveal region.

[0019] According to another aspect of the present application, there is provided a pair of glasses comprising the progressive lens of any of the embodiments of the present application.

[0020] The technical scheme of the embodiment of the present application is that a microstructure region is arranged on the lens body, and the microstructure region comprises a plurality of microscale optical structures, each of which can generate an optical distortion signal with high frequency and low amplitude; the microstructure region at least covers the astigmatic region of the progressive lens. The frequency of the optical distortion signal is higher than that of the astigmatic signal of the astigmatic region, and the amplitude of the optical distortion signal is lower than that of the astigmatic signal. Since the lens body itself has low-frequency and large-scale distortion, strong optical flow disturbance is generated in dynamic vision, which causes the brain to interpret it as environmental movement. Furthermore, in the present application, the microstructure region with high frequency and low amplitude is added to the lens, so that the wearer adapts to the high-frequency fine signal to mask or disrupt the regular optical flow generated by the low-frequency distortion, making it difficult for the brain to detect the overall slow distortion, thereby weakening the discomfort caused by the surge effect.

[0021] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 is a structural schematic diagram of a progressive lens provided according to an embodiment of the present application;

[0024] Figure 2 is a structural schematic diagram of a progressive lens provided according to an embodiment of the present application;

[0025] Figure 3 is a structural schematic diagram of a progressive lens provided according to another embodiment of the present application;

[0026] Figure 4 is an astigmatic schematic diagram of a progressive lens provided in the related art. DETAILED DESCRIPTION

[0027] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0028] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, unless the contrary is indicated. For example, the description and drawings are not meant to restrict the position of the elements. As such, the terms "first", "second", "third", etc. are used herein to describe various elements, but such elements should not be limited by such terminology. The use of the terms "first", "second", "third", etc. are only meant to distinguish one element from another, without necessarily implying a spatial or chronological order. It will be understood that the use of the term "or" in the description above includes a variety of combinations and permutations of the described alternatives and that the term "comprising" is used to mean "including but not limited to". All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any of the following "terms of degree" (e.g., "comprising", "including", "carrying", "having", "charged with", "or the like) are used herein to mean "one or more" of a numerical limitation unless explicitly indicated to the contrary.

[0029] The root cause of the swimming effect in the related art is that the PAL lens's power distribution needs to complete the transition from far to near in a limited area, which inevitably produces peripheral prism effect and aberration in optics. This low-frequency, large-scale distortion produces strong light flow disturbance in dynamic vision, causing the brain to interpret it as environmental movement (i.e., producing the "swimming" illusion). Existing designs start from reducing the distortion amplitude, but it is difficult to ensure a wide enough field of view and a smooth power transition at the same time. The present application takes a different approach, drawing on the adaptability of the human eye to high-frequency, subtle signals: if some high-frequency, subtle distortion "noise" is introduced into the lens, it is possible to mask or disrupt the regular light flow produced by low-frequency distortion, making it difficult for the brain to detect the overall slow distortion, thereby reducing the discomfort caused by the swimming effect.

[0030] Figure 1 is a structural schematic diagram of a progressive lens provided according to an embodiment of the present application. As shown in Figure 1 the progressive lens includes a lens body 100, and a microstructure region A provided on the lens body 100, the microstructure region A including a plurality of microscale optical structures, each of which is capable of generating an optical distortion signal with high frequency and low amplitude; the microstructure region A covers at least a dispersion region of the progressive lens, the frequency of the optical distortion signal is higher than the frequency of a dispersion signal of the dispersion region, and the amplitude of the optical distortion signal is lower than the amplitude of the dispersion signal.

[0031] wherein reference Figure 1The lens body 100 includes a distance vision area 101, a passage area, and a near vision area 103, wherein the passage area is also referred to as a transition area between the distance vision area 101 and the near vision area 103. The passage area refers to a line connecting a far point of view to a near point of view, and this part is basically free of astigmatism. The two sides of the passage area, i.e., the passage side areas 102, are prone to astigmatism, and as the distance to the edge of the lens increases in a direction perpendicular to the passage, the astigmatism area 104 is more prone to be formed. When the wearer wants to look far away, the distance vision area 101 is used, and when the wearer wants to look at a near object, the near vision area 103 is used, so that the same lens can simultaneously achieve distance and near vision correction. However, when the wearer frequently switches between the distance vision area 101 and the near vision area 103 or shakes the head left and right, due to the change in lens power and the aberration generated by the astigmatism area 104, the wearer will feel that the peripheral scene appears to be shaking and will have a dizziness. The embodiment of the present application sets a micro-scale optical structure in the astigmatism area 104, and uses a high-frequency low-amplitude optical distortion signal to cover this dizziness.

[0032] It can be understood that, by modulating the density, shape, arrangement, size, etc. of the micro-scale optical structure, a high-frequency low-amplitude distortion signal can be obtained. When the microstructure area A covers the astigmatism area 104, the high-frequency low-amplitude optical distortion signal has a higher frequency and a lower amplitude than the astigmatism signal of the astigmatism area 104. In this way, the wearer is more likely to capture the high-frequency low-amplitude optical distortion signal formed by the micro-scale optical structure, and is less likely to capture the astigmatism signal of the astigmatism area, so that the wearer ignores the astigmatism signal and reduces the surge effect.

[0033] In one embodiment, an optical simulation software can be used to set the frequency and amplitude of the astigmatism signal of the astigmatism area as a standard, and by modulating the density, shape, arrangement, size, etc. of the micro-scale optical structure, an optical distortion signal with a higher frequency and a lower amplitude than the astigmatism signal is obtained to form the required noise.

[0034] Therefore, the embodiment of the present application sets a micro-scale optical structure capable of generating a high-frequency low-amplitude value in the astigmatism area 104, so that the lens body 100 can additionally generate a high-frequency small-amplitude optical distortion signal while maintaining the original power gradient function. These micro-distortion signals do not directly correct the surge effect itself, nor do they significantly affect the imaging clarity, but achieve the effect of "moving flowers and trees" through the visual masking principle. That is, the human eye is more sensitive to these subtle and rapid changes and can quickly adapt, so that such high-frequency information is preferentially filtered out during neural processing. At the same time, since the micro-distortion noise disrupts the originally smooth distortion flow, the brain's attention to the underlying slow large-scale distortion is reduced, and the subjective perception of the overall surge effect by the wearer is also weakened. In short, the present scheme "deceives" the visual system by applying clever interference noise to make the residual distortion of the progressive lens less noticeable, thereby improving the wearing comfort.

[0035] Optionally, each micro-scale optical structure comprises at least one of a microlens array, a micro-texture structure, a random micro-prism structure, or a random speckle structure.

[0036] It can be understood that in the microstructure region A, only one of the microlens array, the micro-texture structure, the random micro-prism structure, or the random speckle structure can be provided, or a combination of any two of them, or a combination of any three of them, or a combination of all four of them. When only one of them is provided, it is easy to process in the astigmatic region 104 of the lens body 100. When a combination of two or more of them is provided, the micro-scale optical structure is more chaotic, and regular astigmatism is not easy to appear. In addition, different shapes can also be provided according to different regions of the lens body 100. For example, the micro-texture structure can be provided in the edge region of the astigmatic region 104, that is, in the part close to the edge of the distance region 101 or the near region 103, and the microlens array can be provided in the central region of the astigmatic region 104, so as to simultaneously generate anisotropic fine distortion signals, that is, regular astigmatism is not easy to appear.

[0037] The microlens array can be a microlens array, a microconvex lens array, or a convex-concave interval array, and can be randomly arranged or regularly arranged. When regularly arranged, the preparation process is simple and easy to implement. When randomly arranged, regular astigmatism is not easy to appear.

[0038] The micro-texture structure is a concave texture or a convex texture, and the shape is more elongated compared with the microlens. The micro-texture structure can also be randomly arranged or regularly arranged. Similarly, when regularly arranged, the preparation process is simple and easy to implement. When randomly arranged, regular astigmatism is not easy to appear.

[0039] The microlenses in the random microlens structure are randomly distributed. The speckles in the random speckle structure are randomly distributed. The random distribution here is "pseudo-random", which refers to a sequence or number with random characteristics generated by an algorithm, but is essentially deterministic and repeatable, not truly random (such as random numbers based on physical random sources). Pseudo-random numbers / sequences are generated by deterministic algorithms that appear to have statistical properties of random numbers (such as uniform distribution, independence, unpredictability), but actually have reproducibility and periodicity. Reproducibility is the generation of exactly the same sequence by the algorithm given the same initial value. Periodicity is that the sequence will repeat after a long enough period (ideally the period is very long, close to "true randomness"). Thus, the random microlens / speckle structure is to design the lens to be covered with pseudo-randomly distributed micro-lenses or refractive index fluctuations, similar to introducing random speckles inside or on the surface of the lens material. These microstructures can be formed by laser processing, optical 3D printing, etc. The size and shape are irregular but the statistical properties are controllable. This pseudo-random pattern uses the idea of dithering in digital signal processing, by adding designed random noise, it is difficult for the human eye to capture the regularity of the original distortion. The result is like dithering the color steps in a digital image, the obvious color band transition (corresponding to large-scale distortion) is covered by grain noise, and the visual effect becomes smoother.

[0040] Thus, the above microstructure preparation process is simple, and by modulating the density, shape, arrangement, size of the above microstructure, i.e. each micro-scale optical structure, a distortion signal with a frequency higher than the astigmatism signal and an amplitude lower than the astigmatism signal can be obtained, forming the required noise.

[0041] Optionally, the microlenses in the microlens array are arranged in one of a regular arrangement or a random arrangement; when the microlenses in the microlens array are regularly arranged, the microlens array forms a compound eye structure or a honeycomb structure; when the microlenses in the microlens array are randomly arranged, the microlenses in the microlens array are randomly shaped.

[0042] It should be noted that the microlens array is a microlens array structure regularly or randomly arranged on a surface (usually the inner surface) of the lens. Alternatively, when the microscale optical structure is a microlens array, the size of the microlens in the microlens array is 0.1 mm-2 mm. That is, the size of each microlens is on the order of 0.1 mm to 2 mm, with very small local refractive power changes. They are like a group of "compound eye" small lenses distributed on the lens, and each unit will produce slight divergence to the passing light, causing slight fluctuations in local optical power. By designing the curvature and arrangement density of the microlens, the strength and spectral distribution of the micro-distortion can be controlled. That is, when the curvature of the microlens changes little and the arrangement density is large, a high-frequency low-amplitude distortion signal can be obtained. In addition, when the microlens microarray is a compound lens or a honeycomb lens, it can be fully laid out in the astigmatic area 104 without dead angle phenomenon. The random microlens shape can be a quadrilateral, a hexagon, or any other shape.

[0043] Alternatively, when the microscale optical structure is a microtexture structure, the shape of the microtexture structure is at least one of wavy, striped, or scattered dot.

[0044] It should be noted that the microtexture structure is a microtexture structure etched or formed on the surface of the lens in a wavy, striped, or scattered dot shape. For example, fine waves are drawn in the horizontal direction, or rough textures are formed with randomly distributed fine protrusions / recesses. When the line of sight moves on the lens body, the micro changes in the optical path caused by these textures will be perceived by the wearer as slight jitter or flicker. Unlike the overall picture distortion caused by large-scale distortion, microtexture causes local slight shaking. This shaking has a high frequency and low amplitude, similar to adding a "grain" to the visual image, thereby masking the movement of the originally smooth distortion area, thereby reducing the surge effect. Similarly, by designing the size and arrangement density of the microtexture structure, the strength and spectral distribution of the micro-distortion can be controlled. That is, when the size of the microtexture structure changes little and the arrangement density is large, a high-frequency low-amplitude distortion signal can be obtained.

[0045] In one embodiment, since the microlens array and the microtexture structure generally have a specific shape, they can be regularly arranged. In examples without a specific shape, they can also be randomly arranged. The arrangement can be set according to the distortion signal requirements of the lens position where the microstructure region is arranged.

[0046] Alternatively, Figure 2 is a structural schematic diagram of a progressive lens according to an embodiment of the present application, as Figure 2As shown, the microstructure region A is also arranged in the passage-side region 102 of the lens body 100; the structural density of the microstructure region in the astigmatic region 104 is greater than the structural density of the microstructure region in the passage-side region 102, and / or the perturbation amplitude of the microstructure region in the astigmatic region 104 is higher than the perturbation amplitude of the microstructure region in the passage-side region 102.

[0047] It can be understood that, in addition to being arranged in the astigmatic region 104, the microstructure region A is also arranged in the passage-side region 102. The reason is that the astigmatic region 104 must be provided with the microstructure region A, and the astigmatic signal in the astigmatic region 104 is the strongest, so that the microstructure region A provided can to a large extent alleviate the surge effect brought by the astigmatic signal. However, in the passage-side region 102, due to the transition between the distance-use region 101 and the near-use region 103, there is also a certain astigmatic signal. Therefore, by providing the microstructure region A in the passage-side region 102, the surge effect brought by the astigmatic signal can be further alleviated.

[0048] The structural density refers to the number of microstructures or the period of textures per unit area. When the structural density is large, more microstructures can be arranged per unit area. The greater the density, the higher the frequency of the distortion signal generated, and the faster the distortion changes, so that more perturbations can occur within a unit visual angle. When the frequency of the distortion signal generated is high enough, the brain classifies it as background "texture" rather than object deformation. However, too high a frequency can affect the clarity of the image. Therefore, according to the visual acuity of the wearer and the lens power gradient, a frequency band should be selected to make the micro-distortion frequent enough to blend into the visual background, and not cause a decrease in resolution.

[0049] The perturbation amplitude, i.e. contrast, is also the strength of the micro-distortion signal or the maximum degree of deflection of light. If the amplitude is too large, the object will be significantly blurred or double imaged when viewed, and if the amplitude is too small, it will not have a masking effect.

[0050] Since the astigmatic degree in the passage-side region 102 is generally lower than the astigmatic degree in the astigmatic region 104, the structural density of the microstructure region in the astigmatic region 104 can be set to be greater than the structural density of the microstructure region in the passage-side region 102. That is, the frequency of the optical distortion signal in the passage-side region 102 is lower than the frequency of the optical distortion signal in the astigmatic region 104.

[0051] Alternatively, the perturbation amplitude of the microstructure region in the astigmatic region 104 can be set to be higher than the perturbation amplitude of the microstructure region in the passage-side region 102, that is, the amplitude of the optical distortion signal in the passage-side region 102 is higher than the amplitude of the optical distortion signal in the astigmatic region 104.

[0052] Or, the structure density of the microstructure region in the astigmatic region 104 is greater than the structure density of the microstructure region in the flanking region 102, and the perturbation amplitude of the microstructure region in the astigmatic region 104 is higher than the perturbation amplitude of the microstructure region in the flanking region 102.

[0053] And for the flanking region 102 itself, the frequency of the optical distortion signal in the flanking region 102 is higher than the frequency of the astigmatic signal in the flanking region 102, and the amplitude of the optical distortion signal in the flanking region 102 is lower than the amplitude of the astigmatic signal in the flanking region 102.

[0054] In this way, the density of the microscale optical structure arranged in the flanking region 102 can be smaller, thereby reducing the cost on the basis of meeting the requirements. In addition, the clarity of the flanking region 102 can also be avoided. Thus, in the region where the astigmatic signal is strong, the microstructure with large density and large perturbation amplitude can be distributed to shield the astigmatic signal as much as possible, and in the region where the astigmatic signal is weak, the microstructure with small density and small perturbation amplitude can be distributed to maintain the clarity and resolution of the field of view on the basis of shielding the astigmatic signal.

[0055] Optionally, the microstructure in the flanking region 102 is a regular microtexture structure, and the microstructure in the astigmatic region 104 is a random microlens array.

[0056] By introducing a high-density random microlens array in the main distortion region (the astigmatic region 104 below the periphery of the lens), and etching a regular fine texture in the flanking region 102, anisotropic fine distortion signals are generated at the same time. Regular optical distortion signals are avoided, and new aberrations are introduced.

[0057] Optionally, the amplitude of the optical distortion signal generated by each microscale optical structure in the microstructure region A is controlled to be in the order of ±0.75D of the local refractive power.

[0058] That is, when the perturbation amplitude exceeds the order of ±0.75D of the refractive power, the perturbation amplitude is too large, which can cause blur or ghosting when looking at objects. When the perturbation amplitude is too small, it cannot play a masking role. When the perturbation is controlled to be in the order of ±0.75D of the refractive power, the generated image shift is near the human visual threshold, and does not have a large impact on vision.

[0059] Optionally, Figure 3 is a structural schematic diagram of a progressive lens according to another embodiment of the present application. Figure 3 As shown in the figure, the microstructure region A is also arranged in the distance vision region 101 and the near vision region 103 of the progressive lens.

[0060] The microstructure density in the microstructure region of the remote application region 101 is less than the microstructure density in the microstructure region of the near application region 103; and / or, the perturbation amplitude in the microstructure region of the remote application region 101 is less than the perturbation amplitude in the microstructure region of the near application region 103.

[0061] The microstructure density in the microstructure region of the near-use region 103 is less than the microstructure density in the microstructure region of the channel-adjacent region 102; and / or, the perturbation amplitude in the microstructure region of the near-use region 103 is less than the perturbation amplitude in the microstructure region of the channel-adjacent region 102.

[0062] It should be noted that, in one embodiment, for the sake of process simplicity, the microstructures can be uniformly distributed on the lens body 100. For example, the same type of microstructure (microlens array) can be uniformly laid. Alternatively, the microstructures can be differentiated based on the differences between different areas on the lens body 100. For instance, the lower periphery of a PAL lens typically experiences maximum astigmatism and prismatic effects; in these areas, the density or amplitude of the microstructures can be increased. Conversely, in the intermediate transition zone and the main upper field of view, micro-perturbations can be reduced to avoid affecting sharpness. Furthermore, customized patterns can be designed according to specific prescriptions—for example, adding a strip of microtexture along commonly used reading viewing paths to specifically counteract perceived dynamic distortion along those paths.

[0063] In this embodiment, the astigmatism of the far-field region 101 is less than that of the near-field region 103, the astigmatism of the near-field region 103 is less than that of the channel-side region 102, and the astigmatism of the channel-side region 102 is less than that of the astigmatism of the astigmatic region 104. Therefore, different microstructure densities and perturbation amplitudes can be designed based on the different astigmatism levels of each region.

[0064] refer to Figure 4 , Figure 4 The direction of the arrow in the image represents the direction of the principal curvature of the lens, and the length of the arrow represents the intensity of astigmatism on the lens. Figure 4 The horizontal and vertical axes represent the lens size. It can be seen that the astigmatism intensity is greatest in the astigmatic region 104, followed by the channel-side region 102, then the distance region 101, and finally the near region 103.

[0065] In other words, the microstructure density in the microstructure region of the remote application region 101 is less than the microstructure density in the microstructure region of the near application region 103; or, the disturbance amplitude in the microstructure region of the remote application region 101 is less than the disturbance amplitude in the microstructure region of the near application region 103; or, the microstructure density in the microstructure region of the remote application region 101 is less than the microstructure density in the microstructure region of the near application region 103; and the disturbance amplitude in the microstructure region of the remote application region 101 is less than the disturbance amplitude in the microstructure region of the near application region 103.

[0066] The microstructure density in the microstructure region in the near-use region 103 is less than the microstructure density of the microstructure region in the flanking region 102, or the perturbation amplitude in the microstructure region in the near-use region 103 is less than the perturbation amplitude of the microstructure region in the flanking region 102, or the microstructure density in the microstructure region in the far-use region 101 is less than the microstructure density in the microstructure region in the near-use region 103, and the perturbation amplitude in the microstructure region in the far-use region 101 is less than the perturbation amplitude in the microstructure region in the near-use region 103.

[0067] Wherein, when the microstructure densities are set to be different, the perturbation amplitudes can be set to be the same, or when the perturbation amplitudes are set to be different, the microstructure densities can be set to be the same.

[0068] Further, the frequency of the optical distortion signal formed by the far-use region 101 is less than the frequency of the optical distortion signal formed by the near-use region 103, the amplitude of the optical distortion signal formed by the far-use region 101 is less than the amplitude of the optical distortion signal formed by the near-use region 103, and the frequency of the optical distortion signal formed by the far-use region 101 is greater than the frequency of the self-astigmatism signal and the amplitude is lower than the amplitude of the self-astigmatism signal.

[0069] The frequency of the optical distortion signal formed by the near-use region 103 is less than the frequency of the optical distortion signal formed by the flanking region 102, the amplitude of the optical distortion signal formed by the near-use region 103 is less than the amplitude of the optical distortion signal formed by the flanking region 102, and the frequency of the optical distortion signal formed by the near-use region 103 is greater than the frequency of the self-astigmatism signal and the amplitude is lower than the amplitude of the self-astigmatism signal.

[0070] Thus, in the embodiment of the present application, based on the human factor principle, that is, the adaptation speed of the visual system to high-frequency noise is much faster than the adaptation to low-frequency distortion. Further, in the lens with micro-distortion noise, the wearer may notice the existence of fine "texture" or slight shaking in the field of view at the initial stage, but the brain will filter it out in a short time and regard it as part of the environment. This is similar to when people wear glasses with slight scratches or dust, they may initially see the tiny defects on the glass, but soon they can "see through" them and focus their attention on the distant target. Similarly, once the high-frequency micro-distortion is adapted, it has little effect on the clarity and normal vision.

[0071] More importantly, the low-frequency large-scale distortion (i.e. the main cause of the swimming effect) is no longer presented in a smooth continuous manner in the visual input after the addition of the micro-noise. Originally, when the wearer moves his head or eyeballs, the optical flow of the retinal imagery would systematically shift due to the overall distortion of the lens, making the brain perceive that "the scene is shaking". Now, this shift is broken into many small changes by the superimposed high-frequency noise. The brain's motion perception mechanism is more likely to capture consistent overall motion and ignore chaotic rapid shaking. Therefore, under the interference of the micro-distortion noise, the wearer's brain is difficult to integrate those small signals into meaningful motion, in other words, the perception of the swimming effect is greatly dulled.

[0072] In the long run, after the wearer is completely accustomed to the micro-distortion noise itself, he will feel that the lens field of view is much more stable. Many new users of PAL originally need several days or even weeks to adapt to the swimming effect, while the lens designed according to the application is expected to shorten the adaptation period. User subjective feedback will be more inclined to "the lens periphery is slightly textured, but the field of view is stable and does not shake". This proves that the micro-distortion noise successfully makes the brain focus on important visual information (such as the shape and position of the target object), and puts the annoying background distortion out of mind.

[0073] It can be understood that, in addition to the technology of manufacturing microlenses, laser processing can also be used to carve textures on the surface or inside of the lens to produce micro-distortion.

[0074] In addition, in addition to the way of manufacturing the lens, a transparent sticker with micro-distortion can also be manufactured by embossing, and the sticker is temporarily fixed on the surface of the PAL. When the wearer gradually adapts to the PAL, the sticker can be removed by the wearer himself, improving the imaging quality.

[0075] According to another aspect of the application, there is provided a pair of glasses comprising the progressive lens of any embodiment of the application.

[0076] The glasses according to the application have the effects of the lens body as described above, that is to say, without significantly changing the progressive lens, the technical effect of weakening the perception of the swimming effect is achieved. Specifically, it is shown that:

[0077] Dynamic field of view stability is improved: wearing a PAL lens superimposed with micro-distortion noise, in dynamic scenes such as walking, turning head, going up and down stairs, the instability of peripheral scenery is significantly reduced. The wearer feels that the field of view is more stable and is not easy to have the illusion of dizziness. This will improve the safety and comfort of daily activities.

[0078] Wearing comfort and adaptability are enhanced: due to the masking of the streaming effect, the rejection of the new lens wearer to the progressive lens is reduced. Some users who are extremely sensitive to the streaming effect may not be able to adapt to the PAL, and the present solution is expected to reduce the non-tolerance rate of such users to a lower level. Overall, the user is easier to adapt, and the stable visual habit is formed in a shorter time.

[0079] Compatible with existing designs, easy to implement: the micro-distortion noise solution can be superimposed on any existing free-form PAL design. Only one microstructure manufacturing process (such as mold etching or laser direct writing) needs to be added to the traditional lens processing flow, which has limited impact on cost. At the same time, the main refractive function area of the lens does not need to be changed, so the key parameters such as clarity and channel length of the far and near areas remain the same as the original design. In other words, the present application provides a low-cost and high-yield improvement method, which can be widely used in the upgrading of existing PAL product series.

[0080] Innovative visual illusion application: from an academic point of view, the present solution applies the dithering principle to the optical design of glasses, which is an innovative cross between optical engineering and visual science. It does not directly change the optical imaging quality, but cleverly changes the way the human eye perceives distortion, which opens up new ideas for optimizing progressive lenses.

[0081] In summary, by introducing a cleverly designed micro-distortion noise, the present application can greatly improve the dynamic visual comfort of the progressive multifocal lens while not sacrificing the basic optical performance of the lens, fully embodying the innovation and practical value of the present application.

[0082] The technical solution of the embodiment of the present application is that a microstructure region is arranged on the lens body, and the microstructure region includes a plurality of micro-scale optical structures, each micro-scale optical structure can generate an optical distortion signal with high frequency and low amplitude; the microstructure region covers at least the astigmatic region of the progressive lens. The frequency of the optical distortion signal is higher than the frequency of the astigmatic signal of the astigmatic region, and the amplitude of the optical distortion signal is lower than the amplitude of the astigmatic signal. Since the lens body itself has a low-frequency and large-scale distortion that produces strong light flow disturbance in dynamic vision, the brain interprets it as environmental movement, and then, in the present application, by adding a microstructure region with high frequency and low amplitude to the lens, the wearer adapts to the high-frequency subtle signal, so as to mask or disrupt the regular light flow generated by the low-frequency distortion, making it difficult for the brain to detect the overall slow distortion, thereby weakening the discomfort caused by the streaming effect.

[0083] It should be understood that the various forms of the flow shown above can be reordered, added, or deleted steps. For example, the steps described in the present application can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present application can be achieved, which is not limited herein.

[0084] The foregoing detailed description has set forth various embodiments of the application via specific examples. However, it is noted that various modifications, combinations, sub-combinations, and equivalents can be employed, and will be apparent to one skilled in the art in view of this disclosure. Accordingly, the particular description set forth is not intended to be limiting to the scope of the application, as described in the claims below.

Claims

1. A progressive lens, characterized in that, include: The lens body and the microstructure region disposed on the lens body, the microstructure region including multiple microscale optical structures, each of the microscale optical structures being able to generate optical distortion signals with high frequency and low amplitude. The microstructure region at least covers the astigmatic region of the progressive lens, the frequency of the optical distortion signal is higher than the frequency of the astigmatic signal in the astigmatic region, and the amplitude of the optical distortion signal is lower than the amplitude of the astigmatic signal.

2. The progressive lens according to claim 1, characterized in that, Each of the aforementioned microscale optical structures includes at least one of microlens arrays, microtexture structures, random microprism structures, or random speckle structures.

3. The progressive lens according to claim 1, characterized in that, When the microscale optical structure is a microlens array, the size of the microlenses in the microlens array is 0.1mm-2mm.

4. The progressive lens according to claim 3, characterized in that, The microlenses in the microlens array are arranged either in a regular or random manner. When the microlenses in the microlens array are arranged regularly, the microlens array forms a compound eye structure or a honeycomb structure; When the microlenses in the microlens array are arranged randomly, the microlenses in the microlens array have random shapes.

5. The progressive lens according to claim 1, characterized in that, When the microscale optical structure is a microtexture structure, the shape of the microtexture structure is at least one of wavy, striped, or scattered.

6. The progressive lens according to claim 1, characterized in that, The microstructure region is also arranged in the channel-side region of the progressive lens; The structural density of the microstructure region in the astigmatic region is greater than the structural density of the microstructure region in the channel-side region, and / or the perturbation amplitude of the microstructure region in the astigmatic region is greater than the perturbation amplitude of the microstructure region in the channel-side region.

7. The progressive lens according to claim 6, characterized in that, The microstructure in the channel-side region is a regular microtexture structure, and the microstructure in the astigmatic region is a random microlens array.

8. The progressive lens according to claim 1, characterized in that, The amplitude of the optical distortion signal generated by each of the microscale optical structures in the microstructure region ensures that the local refractive power perturbation is controlled within the refractive power range of ±0.75D.

9. The progressive lens according to claim 6, characterized in that, The microstructure region is also arranged in the distance and near vision regions of the progressive lens; The microstructure density in the microstructure region of the remote use region is less than the microstructure density in the microstructure region of the near use region; and / or, the perturbation amplitude in the microstructure region of the remote use region is less than the perturbation amplitude in the microstructure region of the near use region. The microstructure density in the microstructure region of the near-use region is less than the microstructure density in the microstructure region of the channel-side region; and / or, the perturbation amplitude in the microstructure region of the near-use region is less than the perturbation amplitude in the microstructure region of the channel-side region.

10. A pair of eyeglasses, characterized in that, Including progressive lenses as described in any one of claims 1-9.

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