A localized aberration-regulating lens and a design method

Abstract

A localized aberration control lens and its design method primarily address the problem that traditional microstructure lens designs cannot quantitatively control higher-order aberrations and cannot customize lens designs to address the individualized higher-order aberrations of the wearer's eyes. This invention provides a localized aberration control lens and its design method. Unlike existing technologies, the localized aberration control of this invention calculates and obtains the higher-order aberrations generated by the initial structure of the lens in various viewing directions within the dynamic field of vision of the human eye. Referring to the total higher-order aberrations of the human eye in the corresponding viewing directions, the surface shape of the unit components in the localized aberration control functional layer is adjusted so that the higher-order aberrations generated by the lens can reach or exceed a set threshold. Under the action of localized aberration control, the lens corrects the higher-order aberrations of the human eye only at the central zero-degree viewing angle, providing a high-definition imaging surface; at other peripheral viewing angles, the lens does not correct the higher-order aberrations of the human eye, and the resulting additional higher-order aberrations are proportional to the higher-order aberrations of the human eye. Therefore, in the dynamic field of vision, the eye can perceive a balanced and significant peripheral blurred image.

Description

Technical Field

[0001] This invention relates to an optical lens and its design method for refractive correction and image quality control, specifically to a localized aberration control lens and its design method. Background Technology

[0002] With the rapid increase in the incidence of myopia, especially among those with high myopia, and the clinical revelation of the intrinsic link between myopia and blinding fundus diseases such as retinal detachment and macular degeneration, myopia and its prevention and control measures are increasingly becoming core issues for the eye health of the entire population. Particularly in the field of myopia prevention and control among adolescents, there has been a sustained and rapid development trend in recent years across industry, healthcare, and consumer sectors.

[0003] Microstructured eyeglasses, represented by arrayed microlenses and arrayed microcylinders, have become the mainstream products for controlling myopia progression. Because of the positive additional refractive power of the microstructures, the optical principle of these microstructured eyeglasses is usually explained as a peripheral myopia defocusing effect on the retina. It is well known that the concept of defocus refers to the entire imaging wavefront, but individual microlenses and microcylinders only produce isolated phase modulation in local areas of the overall wavefront and do not affect the global wavefront, thus having no relation to defocusing. In fact, arrayed microlenses and arrayed microcylinders generate periodic phase perturbations on the overall imaging wavefront. Through wavefront decomposition, this wavefront perturbation corresponds to higher-order aberrations. Higher-order aberrations diffuse the energy of image points, blurring image details and reducing contrast, giving the wearer a blurred visual experience. Clearly, higher-order aberrations in the imaging wavefront are the key factor in the myopia progression control effect of microstructured eyeglasses. Previously, this key factor was often overlooked. There is an urgent need to establish design, analysis and evaluation methods for next-generation microstructure lenses focusing on higher-order aberrations, and the higher-order aberrations of the human eye itself also need to be considered in the design. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this invention provides a localized aberration control lens and its design method, mainly targeting personalized human eye wavefront aberrations, especially higher-order aberrations, and solving the problem of matching additional higher-order aberrations in microstructure lenses.

[0005] The technical solution adopted in this invention is:

[0006] A localized aberration control lens, including

[0007] The basal functional layer is a continuous, smooth base surface composed of a spherical, cylindrical, aspherical, or toroidal aspherical surface. This basal functional layer possesses basic refractive power, capable of correcting refractive errors in the eye. The refractive power at the center of the basal functional layer corresponds to the refractive correction amount required by the optometry prescription.

[0008] The localized aberration control functional layer, which covers the lens substrate functional layer, is a continuous or discontinuous freeform surface additional layer formed by the regular or irregular arrangement and combination of freeform surface unit components. The localized aberration control functional layer has the function of adding higher-order aberrations. It couples with the personalized higher-order aberrations of the human eye within the dynamic field of vision, reshapes the imaging quality on the retina, and thus controls the development of the eye's refractive state.

[0009] The localized aberration control functional layer can correct the higher-order aberrations of the human eye in the 3-6mm pupil diameter range centered on the optical center of the lens by generating additional higher-order aberrations, thus significantly improving the image quality.

[0010] The additional higher-order aberrations generated by the localized aberration control functional layer within a pupil diameter range of 3 to 6 mm with the center at a position of 1 to 3 mm from the optical center of the lens can partially correct the higher-order aberrations of the human eye in the corresponding visual direction.

[0011] The additional higher-order aberrations generated by the localized aberration control functional layer within a pupil diameter range of 3-6 mm with the center at a position more than 3 mm away from the optical center of the lens will not correct the higher-order aberrations of the human eye in the corresponding visual direction, thus reducing the image quality.

[0012] The localized aberration control functional layer includes a high-definition imaging working area, which is within a radius of 3-4 mm centered on the optical center of the lens.

[0013] The localized aberration control function layer includes a blurred imaging working area, which is the area outside the high-definition imaging working area.

[0014] The surface shape of the high-definition imaging working area is the wavefront of the human eye's higher-order aberrations at the center zero-degree angle divided by the difference in refractive index between the lens material and air.

[0015] The blurred imaging working area is composed of freeform surface unit components.

[0016] The surface shape of the freeform surface unit component is described by a higher-order polynomial.

[0017] The localized aberration control functional layer generates additional higher-order aberrations within the pupil range in the blurred imaging working area, with the root mean square value reaching more than 10% of the corresponding visual angle human eye higher-order aberration RMS value.

[0018] The localized aberration control functional layer is disposed on the base functional layer on the object-facing side of the lens and / or on the eye-facing side of the lens.

[0019] The boundary contour of the freeform surface unit component is a polygon, a circle, or an irregular closed curve shape.

[0020] The freeform surface unit components are arranged in a seamless, tightly packed or sparsely packed manner according to a fixed period or a non-periodic method.

[0021] The localized aberration control functional layer covers more than 40% of the area of ​​the lens substrate functional layer.

[0022] The additional higher-order aberrations of the localized aberration control lens and the personalized higher-order aberrations of the human eye are considered for the fovea of ​​the retina under dynamic visual field conditions.

[0023] A design method for a localized aberration control lens as described above includes the following steps:

[0024] Step 1: Establish the initial three-dimensional simulation model of the lens, including the lens center thickness and the front and rear surface shapes. The surface shapes include the basic curved surface of the lens base functional layer and the initial curved surface of the localized aberration control functional layer. The initial curved surface is composed of free-form surface unit components described by high-order polynomials arranged in an array, and initialized as a plane within a radius of 3~4 mm with the optical center of the lens as the center.

[0025] Step 2: Establish a three-dimensional simulation model of the lens-eye combination, where the eye part includes the lens-eye distance, pupil size and position, and coordinate parameters of the eyeball rotation center;

[0026] Step 3: Tracing the principal ray in reverse starts from the center of eye rotation, travels along the predetermined eye gaze direction, and after being refracted by the rear and front surfaces of the lens, travels towards the object on one side of the object plane, and determines the coordinates of the object point at a given object distance.

[0027] Step 4: Starting from the object point coordinates determined in Step 3, trace a large number of actual imaging rays along the light path. After being refracted by the lens, the rays reach the pupil position of the eye. Calculate the total optical path of each ray and subtract it from the optical path of the principal ray to obtain the imaging wavefront and additional higher-order aberrations generated by the lens in the corresponding viewing angle direction.

[0028] Step 5: In the zero-degree viewing angle direction, within a radius of 3~4 mm, subtract the higher-order wavefront aberrations produced by the lens under the same viewing angle obtained in Step 4 from the measured higher-order wavefront aberrations of the human eye. Divide the wavefront of the remaining higher-order aberrations by the difference in refractive index between the lens material and air. The result is used as the surface shape of the high-definition imaging working area of ​​the localized aberration control functional layer.

[0029] Step six: In the peripheral viewing direction, the imaging optical path passes through the blurred imaging working area. Calculate the RMS value of the higher-order wavefront aberration of the lens obtained in step four and the measured RMS value of the higher-order wavefront aberration of the human eye. If the ratio of the two is less than a preset threshold, adjust the expression and coefficients of the higher-order polynomial to increase the surface shape amplitude and complexity of the freeform surface unit component. Repeat step four until the ratio is greater than the threshold. Traverse all viewing directions of the peripheral operation to form the final surface shape of the blurred imaging working area of ​​the localized aberration control functional layer.

[0030] Step 7: Superimpose the final surface shape of the localized aberration control functional layer onto the base surface of the base functional layer to form the working surface of the localized aberration control lens.

[0031] The beneficial effects of this invention are as follows: The localized aberration control lens proposed in this invention progressively optimizes the surface shape of the localized aberration control functional layer of the lens based on measured higher-order aberrations of the human eye in various viewing directions. This results in a high-definition imaging working area at the central zero-degree viewing direction and a balanced, stable, and effective blurred imaging working area in the peripheral viewing directions. Because it fully considers the individualized factors of higher-order aberrations of the human eye, the localized aberration control lens has personalized customization attributes. In dynamic visual fields, the wearer can significantly perceive changes in image quality with viewing angle. Compared to traditional microstructured lenses that do not consider the higher-order aberrations of the human eye, the localized aberration control lens can present a more distinct and stable contrast between clear and blurred images. It does not suffer from higher-order aberration compensation issues in the peripheral field of view, and can better control the progression of refractive errors. Attached Figure Description

[0032] Appendix Figure 1 This is the initial structure of the localized aberration control functional layer of the present invention.

[0033] Appendix Figure 2 for Figure 1 The initial freeform surface of the unit components that constitute the localized aberration control functional layer.

[0034] Appendix Figure 3 This invention provides a three-dimensional model of the dynamic field of view composed of a localized aberration control lens and a simplified eye.

[0035] Appendix Figure 4 for Figure 3 Spatial optical path tracing of imaging rays from various viewpoints.

[0036] Appendix Figure 5 for Figure 4 The localized aberration control lens produces an outgoing wavefront in various viewing directions.

[0037] Appendix Figure 6This is an improved freeform surface unit component for enhancing higher-order RMS aberrations.

[0038] Appendix Figure 7 This is the final structure of the localized aberration control functional layer in Embodiment 1 of the present invention. Detailed Implementation

[0039] The invention will be further described below with reference to the accompanying drawings: As shown in the figures, a localized aberration control lens includes a base functional layer 10. The base functional layer is a continuous, smooth base surface composed of a spherical, cylindrical, aspherical, or toroidal aspherical surface. The base functional layer possesses basic refractive power, capable of correcting refractive errors in the eye. The refractive power at the center of the base functional layer corresponds to the refractive correction amount required by the optometry prescription.

[0040] The localized aberration control functional layer 11 covers the lens substrate functional layer 10. It is a continuous or discontinuous freeform surface additional layer formed by the regular or irregular arrangement of freeform surface unit components 12. The localized aberration control functional layer has the function of adding higher-order aberrations. It couples with the personalized higher-order aberrations of the human eye within the dynamic field of vision, reshapes the imaging quality on the retina, and thus controls the development of the refractive state of the eyeball.

[0041] The localized aberration control functional layer 11 can correct the higher-order aberrations of the human eye in the 3-6mm pupil diameter range centered on the optical center of the lens by generating additional higher-order aberrations, thus significantly improving the imaging quality.

[0042] The localized aberration control functional layer 11 can partially correct the higher-order aberrations of the human eye in the corresponding visual direction by generating additional higher-order aberrations within a pupil diameter range of 3-6 mm with the center of the circle 1-3 mm away from the optical center of the lens.

[0043] The additional higher-order aberrations generated by the localized aberration control functional layer 11 within a pupil diameter range of 3 to 6 mm with the center at a position more than 3 mm away from the optical center of the lens will not correct the higher-order aberrations of the human eye in the corresponding visual direction, thus reducing the image quality.

[0044] The localized aberration control functional layer 11 includes a high-definition imaging working area, which is within a radius of 3-4 mm centered on the optical center of the lens.

[0045] The localized aberration control function layer 11 includes a blurred imaging working area, which is the area outside the high-definition imaging working area.

[0046] The surface shape of the high-definition imaging working area is the wavefront of the human eye's higher-order aberrations at the center zero-degree angle divided by the difference in refractive index between the lens material and air.

[0047] The blurred imaging working area is composed of freeform surface unit components 12.

[0048] The surface shape of the freeform surface unit component 12 is described by a higher-order polynomial.

[0049] The root mean square (RMS) of the additional higher-order aberrations generated within the pupil range in the blurred imaging working area by the localized aberration control functional layer 11 reaches more than 10% of the RMS value of the higher-order aberrations of the human eye at the corresponding viewing angle.

[0050] The localized aberration control functional layer 11 is disposed on the base functional layer 10 on the object-facing side of the lens and / or on the eye-facing side of the lens.

[0051] The boundary contour of the freeform surface unit component 12 is a polygon, a circle, or an irregular closed curve shape.

[0052] The freeform surface unit components 12 are arranged in a seamless, tightly packed or sparse manner according to a fixed period or a non-periodic method.

[0053] The localized aberration control functional layer 11 covers more than 40% of the area of ​​the lens substrate functional layer 10.

[0054] The additional higher-order aberrations of the localized aberration control lens and the personalized higher-order aberrations of the human eye are considered for the fovea of ​​the retina under dynamic visual field conditions.

[0055] A design method for a localized aberration control lens as described above includes the following steps:

[0056] Step 1: Establish the initial three-dimensional simulation model of the lens, including the lens center thickness and front and rear surface shapes. The surface shapes include the basic curved surface of the lens base functional layer 10 and the initial curved surface of the localized aberration control functional layer 11. The initial curved surface is composed of freeform surface unit components 12 described by high-order polynomials arranged in an array, and initialized as a plane within a radius of 3~4 mm with the optical center of the lens as the center.

[0057] Step 2: Establish a three-dimensional simulation model of the lens-eye combination, where the eye part includes the lens-eye distance, pupil size and position, and coordinate parameters of the eyeball rotation center;

[0058] Step 3: Tracing the principal ray in reverse starts from the center of eye rotation, travels along the predetermined eye gaze direction, and after being refracted by the rear and front surfaces of the lens, travels towards the object on one side of the object plane, and determines the coordinates of the object point at a given object distance.

[0059] Step 4: Starting from the object point coordinates determined in Step 3, trace a large number of actual imaging rays along the light path. After being refracted by the lens, the rays reach the pupil position of the eye. Calculate the total optical path of each ray and subtract it from the optical path of the principal ray to obtain the imaging wavefront and additional higher-order aberrations generated by the lens in the corresponding viewing angle direction.

[0060] Step 5: In the zero-degree viewing angle direction 0, within a radius of 3~4 mm, subtract the higher-order wavefront aberrations generated by the lens under the same viewing angle obtained in Step 4 from the measured higher-order wavefront aberrations of the human eye. Divide the wavefront of the remaining higher-order aberrations by the difference in refractive index between the lens material and air. The result is used as the surface shape of the high-definition imaging working area of ​​the localized aberration control functional layer.

[0061] Step six: In the peripheral viewing directions (specifically including viewing angle 1, viewing angle 2, viewing angle 3, and viewing angle 4), the imaging optical path passes through the blurred imaging working area. The RMS value of the higher-order wavefront aberration of the lens obtained in step four and the RMS value of the measured higher-order wavefront aberration of the human eye are calculated respectively. If the ratio of the two is less than a preset threshold, the expression and coefficients of the higher-order polynomial are adjusted to increase the surface amplitude and complexity of the freeform surface unit component 13. Step four is repeated until the ratio is greater than the threshold. The various viewing directions of the peripheral operation are traversed to form the final surface of the blurred imaging working area of ​​the localized aberration control functional layer.

[0062] Step 7: Superimpose the final surface shape of the localized aberration control functional layer onto the base surface of the base functional layer to form the working surface of the localized aberration control lens.

[0063] The method for designing lenses with localized aberration control includes the following steps:

[0064] (1) Establish the initial simulation model of the lens

[0065] The lens structure includes a central thickness and front and rear surface profiles. The surface profiles include the base surface of the lens substrate functional layer and the initial freeform surface of the localized aberration control functional layer. The initial freeform surface is a microstructure surface composed of unit components described by a high-order polynomial arranged in an array, wherein it is initialized as a plane within a radius of 3-4 mm centered on the optical center of the lens.

[0066] The overall surface shape of the lens is represented by a high-density point cloud method. The first and second partial derivatives of the surface shape are obtained by interpolation and numerical gradient algorithms. The slope and normal direction of each point on the surface are quickly calculated in matrix form for subsequent ray tracing calculations.

[0067] (2) Establish a three-dimensional simulation model of the lens-eye combination.

[0068] The lens-eye combination model mimics the application scenario of wearing lenses, specifically including the three-dimensional structure and tilt posture of the lenses, and the structure and rotation orientation of the eye model. The eye model includes the size and position of the pupil and the coordinates of the eyeball rotation center. The visual field range and eyeball rotation angle corresponding to the scanning process from the center of the lens to the periphery are set.

[0069] (3) Principal ray tracing

[0070] The ray tracing algorithm calculates the trajectory of the principal ray, originating from the center of eye rotation, passing through the center of the pupil, and refracting through the rear and front surfaces of the lens before intersecting the object plane in object space. This yields the object point coordinates and the principal ray path for each viewpoint. The object plane is a pre-constructed equidistant sphere. The ray tracing algorithm is based on the vector form of the law of refraction and employs an iterative algorithm with successive approximations to calculate the incident point coordinates and exit direction of the ray on the lens surface.

[0071] (4) Calculation of the imaging wavefront of the lens

[0072] Starting from the object point coordinates along the stated viewing direction, a large number of actual imaging rays are traced and calculated. After refraction through the sub-aperture of the lens, they reach the reference spherical position where the pupil plane of the eye is located. The sub-aperture of the lens matches the pupil size. The optical path of each ray is calculated, and subtracted from the optical path of the principal ray to obtain the imaging wavefront and wavefront aberrations generated by the lens in that viewing direction. Aberration decomposition is performed on the imaging wavefront, and RMS higher-order aberrations are calculated.

[0073] (5) Construction of the high-definition imaging work area surface

[0074] The high-definition imaging working area of ​​the localized aberration control functional layer corresponds to the zero-degree viewing angle direction where the optical center of the lens is located. It is a circular area with a radius of 3-4 mm, which is initially planar. The high-order wavefront aberrations generated by the lens at the zero-degree viewing angle are subtracted from the measured high-order wavefront aberrations of the human eye. The wavefront of the remaining high-order aberrations is divided by the difference in refractive index between the lens material and air. This result is used as the surface shape of the high-definition imaging working area.

[0075] (6) Construction of the working area surface for blurred imaging

[0076] By selecting peripheral viewing directions one by one, the RMS higher-order aberrations of the lens are extracted and compared with the measured RMS higher-order aberrations of the human eye. If the ratio is less than a preset threshold, the polynomial is adjusted to change the surface shape of the local unit component, thereby improving the RMS higher-order aberrations generated by the lens imaging in that viewing direction, ensuring that the ratio is greater than the threshold. After traversing all viewing directions, the final surface shape of the blurred imaging working area of ​​the localized aberration control functional layer is formed.

[0077] (7) The final surface of the localized aberration control functional layer is superimposed on the basic curved surface of the base functional layer to form the complete working surface of the localized aberration control lens.

[0078] The localized aberration control lens designed through the above steps includes a base functional layer and a localized aberration control functional layer.

[0079] The base functional layer is a continuous and smooth basic curved surface composed of spherical, cylindrical, aspherical, or toroidal aspherical surfaces, which has basic refractive power and can correct refractive errors of the eye.

[0080] The localized aberration control functional layer covers a lens area within a radius of 20 mm. It is a continuous or discontinuous freeform surface supplementary layer formed by the regular or irregular arrangement and combination of freeform surface unit components. It has the function of adding higher-order aberrations and can couple with personalized human eye higher-order aberrations in various viewing directions to reshape the imaging quality on the retina.

[0081] The localized aberration control functional layer generates additional higher-order aberrations in the central zero-degree field of view direction, which can correct some or all of the higher-order aberrations of the human eye, significantly improving imaging quality.

[0082] The localized aberration modulation functional layer generates additional higher-order aberrations in the field of view near the center, which can partially correct higher-order aberrations in the human eye.

[0083] The additional higher-order aberrations generated by the localized aberration control functional layer at a distance of more than 3 mm from the optical center of the lens will not correct the higher-order aberrations of the human eye, thus reducing the image quality.

[0084] The localized aberration control functional layer includes a high-definition imaging working area located at the center of the lens, within a radius of 3-4 mm centered on the optical center of the lens. To correct higher-order aberrations of the human eye, the surface shape of this high-definition imaging working area is obtained by dividing the wavefront of the higher-order aberrations of the human eye by the difference in refractive index between the lens material and air.

[0085] The area outside the high-definition imaging working area is the blurred imaging working area of ​​the localized aberration control functional layer. The blurred imaging working area is composed of freeform surface unit components. The surface shape of the freeform surface unit components is a smooth surface described in the form of a high-order polynomial. The boundary contour of the unit components can be polygonal, circular, or an irregular closed curve shape. The unit components are arranged in a seamless, tightly packed or sparsely packed manner according to a fixed period or a non-periodic pattern. The RMS value of the additional high-order aberrations generated by the blurred imaging working area must reach a specific proportion or higher than the RMS value of high-order aberrations in the human eye.

[0086] The localized aberration control layer is disposed on the object-facing surface of the lens and / or the eye-facing surface of the lens. The localized aberration control layer covers more than 40% of the lens surface.

[0087] The additional higher-order aberrations of the localized aberration control lens and the personalized higher-order aberrations of the human eye are considered for the fovea of ​​the retina under dynamic visual field conditions.

[0088] The localized aberration control lens described in this embodiment has a convex surface, i.e., the front surface of the lens, comprising a spherical base and a localized aberration control functional layer covering it. The inner surface can be spherical, aspherical, or torus. The lens working diameter is 60 mm. The material refractive index is 1.59, and the center thickness is 2.0 mm. The surface curvature of the front surface of the lens is 2.5 D, and the distance prescription power is -1.00 D. First, the lens is initially designed with freeform surface unit components. Based on this, the localized aberration control functional layer is formed by splicing and combining the unit components, which is then superimposed on the base functional layer. Then, through spatial ray tracing simulation using a three-dimensional simulation model of glasses and eyes, the higher-order aberrations of the lens in the imaging viewing direction are extracted and compared with known higher-order aberrations of the human eye. This improves the design of the freeform surface unit components. Simultaneously, in conjunction with the correction of higher-order aberrations of the human eye in the central zero-degree field of view, the global morphology of the localized aberration control functional layer is formed, thus realizing the design finalization of the localized aberration control lens.

[0089] The following description, in conjunction with the accompanying drawings, further illustrates this embodiment.

[0090] As can be seen from the lens curvature and prescription power, the base functional layers on both the anterior and posterior surfaces of the lens are spherical. The localized aberration control functional layer is located on the anterior surface of the lens. Figure 1 In a specific embodiment, the localized aberration control functional layer is composed of freeform surface unit components. Preferably, the unit components adopt a regular hexagonal outer contour and are assembled in a tightly fitted manner according to a fixed period. The initial surface shape within the central 3 mm radius region of the localized aberration control functional layer is planar.

[0091] Figure 2 yes Figure 1 The initial surface structure of the freeform surface unit component used in the specific embodiment is described by the following polynomial:

[0092]

[0093] The coefficients of the polynomial take values ​​of .

[0094] Figure 3 It is a 3D model constructed using a localized aberration control lens and a simplified eye model. The front surface of the lens is covered with... Figure 1The localized aberration control layer shown has an eye rotation center set on the central axis of the lens, 24 mm from the posterior surface of the lens, and a pupil diameter of 6 mm. Figure 3 The line segments in the diagram represent the paths of the principal rays, all originating from the center of eye rotation. Each principal ray represents a gaze direction. Figure 3 In the specific embodiment, five gaze directions are provided, all at a 45-degree azimuth angle, including one central zero-degree view and four peripheral viewpoints. The principal ray extends further along one side of the object space of the lens, intersecting with the object surface to obtain the coordinates of the object point being gazed upon. When switching between different viewpoints, the pupil rotates with the eyeball around the eye movement center, with a rotation radius of 14 mm.

[0095] Figure 4 Is Figure 3 In a specific embodiment, spatial optical path tracing calculation is performed on the imaging rays emitted from the object point. The imaging rays fill the pupil of the eye, and the sampling interval on the pupillary surface is less than 0.05 mm. The light rays originate from the object point, are refracted by the front and rear surfaces of the lens, and terminate at the pupillary surface of the eye.

[0096] Figure 5 Is Figure 4 In this embodiment, the exit wavefront of the lens at various viewing angles is obtained by comparing the total optical path of each ray with the optical path of the principal ray. The exit wavefront at the central zero-degree viewing angle is a regular rotationally symmetric surface with fewer higher-order aberration components. The peripheral viewing angles (1-4) pass through the blurred working area of ​​the localized aberration control layer, and their exit wavefronts contain abundant higher-order aberrations. The RMS higher-order aberrations for these four peripheral viewing angles are calculated to be 0.153m, 0.151m, 0.150m, and 0.140m, respectively.

[0097] Assuming that the wavefront aberrations of the human eye are the same for the current lens wearer at all viewing angles, and that the only higher-order aberration is primary spherical aberration, and that the RMS higher-order aberration of the human eye is 0.20m, then... Figures 1 to 5 The ratio of the RMS higher-order wavefront aberrations generated by the lens in the embodiment to the RMS higher-order wavefront aberrations of the human eye is less than 0.765.

[0098] If the ratio of the RMS higher-order wavefront aberrations produced by the lens to the RMS higher-order wavefront aberrations of the human eye is required to be no less than 90%, then Figures 1 to 5 The example did not meet the threshold requirement, therefore it is necessary to... Figure 1 and Figure 2 Improvements were made to the localized aberration control function layer and unit components. Figure 6 and Figure 7 These are the improved and optimized freeform surface unit components and the corresponding localized aberration control function layer.

[0099] Figure 6The unit component surface type in is Figure 2 This is achieved by adding higher-order polynomials to the surface shape. The surface shape is described by the following polynomial:

[0100]

[0101] The coefficients of the polynomial take values ​​of , The component maintains a regular hexagonal outer contour.

[0102] Figure 7 This embodiment represents the improved and optimized localized aberration control functional layer, where the blurred imaging working area is composed of... Figure 6 The freeform surface unit components are assembled by close splicing. In order to correct the higher-order aberrations of the human eye at a zero-degree central viewing angle, the high-definition imaging working area within a central 3mm radius is filled with the morphology obtained by dividing the wavefront of the wearer's higher-order aberrations (currently only primary spherical aberration) by the difference between the refractive index of the lens material and air.

[0103] Will Figure 7 The improved and optimized localized aberration control function layer was re-imported. Figure 3 and Figure 4 Spatial ray tracing was performed from various viewpoints to obtain the outgoing wavefront of the lens image. The RMS higher-order aberrations of the surrounding viewpoints were calculated, and the results were 0.199 m, 0.197 m, 0.197 m, and 0.182 m, respectively. All of these exceeded the set threshold of 90% for RMS higher-order wavefront aberrations of the human eye, thus meeting the design requirements.

[0104] This invention is not limited to the illustrated embodiments, and the design method is not limited by lens material, surface curvature, size, or processing power. The localized aberration control layer can be superimposed on the surface of the lens or integrated into the interlayer of the lens through localized refractive index changes. This lens comprehensively considers the wearer's individual wavefront aberration factors and adopts a customized design concept. It can regulate image quality through higher-order aberrations within the dynamic field of vision of the human eye, correcting refractive errors while providing limited and effective adjustment to visual quality, thereby regulating the progression of refractive errors. The design method is not limited to spectacle lenses but is also applicable to contact lenses such as contact lenses.

Claims

1. A localized-aberration-regulating lens, characterized by: include The base functional layer (10) is a continuous, smooth base surface composed of a spherical, cylindrical, aspherical, or toroidal aspherical surface, and has a base refractive power. The refractive power at the center of the base functional layer matches the refractive correction amount required by the optometry prescription. A localized aberration control functional layer (11) covers the lens substrate functional layer (10) and includes a high-definition imaging working area corresponding to the zero-degree viewing angle direction where the optical center of the lens is located, and a blurred imaging working area outside the high-definition imaging working area. The high-definition imaging working area has a surface shape that allows the additional higher-order aberrations generated by the high-definition imaging working area to correct the higher-order aberrations of the human eye in the corresponding viewing angle direction. The blurred imaging working area is a continuous or discontinuous freeform surface supplementary layer formed by the regular or irregular arrangement and combination of freeform surface unit components (12). The localized aberration control functional layer has the function of adding higher-order aberrations. It couples with the personalized higher-order aberrations of the human eye within the dynamic field of vision, reshapes the imaging quality on the retina, and thus controls the development of the refractive state of the eyeball. The surface profile of the high-definition imaging working area is the wavefront of the human eye's higher-order aberrations at a central zero-degree viewing angle divided by the difference in refractive index between the lens material and air. The root mean square value of the additional higher-order aberrations generated in the pupil range of the blurred imaging working area by the localized aberration control layer (11) reaches more than 10% of the RMS value of the higher-order aberrations of the human eye at the corresponding viewing angle.

2. The localized-aberration-modulation lens of claim 1, wherein: The localized aberration control functional layer (11) can correct the higher-order aberrations of the human eye in the corresponding visual direction by generating additional higher-order aberrations within a pupil diameter range of 3~6mm with the optical center of the lens as the center.

3. The localized aberration control lens according to claim 1, characterized in that: The localized aberration control functional layer (11) generates additional higher-order aberrations within a pupil diameter range of 3 to 6 mm with the center of the circle at a position of 1 to 3 mm from the optical center of the lens. These aberrations can partially correct the higher-order aberrations of the human eye in the corresponding visual direction.

4. The localized aberration control lens according to claim 1, characterized in that: The additional higher-order aberrations generated by the localized aberration control functional layer (11) within a pupil diameter range of 3 to 6 mm with the center at a position more than 3 mm away from the optical center of the lens will not correct the higher-order aberrations of the human eye in the corresponding visual direction.

5. The localized aberration control lens according to claim 2, characterized in that: The range of the high-definition imaging working area is within a radius of 3-4 mm centered on the optical center of the lens.

6. The localized aberration control lens according to claim 1, characterized in that: The surface shape of the freeform surface unit component (12) is described by a higher-order polynomial.

7. The localized aberration control lens according to claim 1, characterized in that: The localized aberration control functional layer (11) is disposed on the base functional layer (10) on the object-facing side of the lens and / or on the eye-facing side of the lens.

8. The localized aberration control lens according to claim 1, characterized in that: The boundary contour of the freeform surface unit component (12) is a polygon, a circle, or an irregular closed curve shape.

9. The localized aberration control lens according to claim 1, characterized in that: The freeform surface unit components (12) are arranged in a seamless, tightly packed or sparse manner according to a fixed period or a non-periodic method.

10. The localized aberration control lens according to claim 1, characterized in that: The localized aberration control functional layer (11) covers more than 40% of the area of ​​the lens substrate functional layer (10).

11. The localized aberration control lens according to claim 1, characterized in that: The additional higher-order aberrations of the localized aberration control lens and the personalized higher-order aberrations of the human eye are considered for the fovea of ​​the retina under dynamic visual field conditions.

12. A design method for a localized aberration control lens as described in any one of claims 1-11, characterized in that: Includes the following steps: Step 1: Establish the initial three-dimensional simulation model of the lens, including the lens center thickness and the front and rear surface shapes. The surface shapes include the basic curved surface of the lens base functional layer (10) and the initial curved surface of the localized aberration control functional layer (11). The initial curved surface is composed of free-form surface unit components (12) described by high-order polynomials arranged in an array, and initialized as a plane within a radius of 3~4 mm with the optical center of the lens as the center. Step 2: Establish a three-dimensional simulation model of the lens-eye combination, where the eye part includes the lens-eye distance, pupil size and position, and coordinate parameters of the eyeball rotation center; Step 3: Tracing the principal ray in reverse starts from the center of eye rotation, travels along the predetermined eye gaze direction, and after being refracted by the rear and front surfaces of the lens, travels towards the object on one side of the object plane, and determines the coordinates of the object point at a given object distance. Step 4: Starting from the object point coordinates determined in Step 3, trace a large number of actual imaging rays along the light path. After being refracted by the lens, the rays reach the pupil position of the eye. Calculate the total optical path of each ray and subtract it from the optical path of the principal ray to obtain the imaging wavefront and additional higher-order aberrations generated by the lens in the corresponding viewing angle direction. Step 5: In the zero-degree viewing angle direction (0), within a radius of 3~4 mm, subtract the higher-order wavefront aberrations generated by the lens under the same viewing angle obtained in Step 4 from the measured higher-order wavefront aberrations of the human eye. Divide the wavefront of the remaining higher-order aberrations by the difference in refractive index between the lens material and air. The result is used as the surface shape of the high-definition imaging working area of ​​the localized aberration control functional layer. Step six: In the peripheral viewing direction, the imaging optical path passes through the blurred imaging working area. The RMS value of the higher-order wavefront aberration of the lens obtained in step four and the RMS value of the measured higher-order wavefront aberration of the human eye are calculated respectively. If the ratio of the two is less than the preset threshold, the expression and coefficient of the higher-order polynomial are adjusted to increase the surface shape amplitude and complexity of the freeform surface unit component (12). Step four is repeated until the ratio is greater than the threshold. The various viewing directions of the peripheral operation are traversed to form the final surface shape of the blurred imaging working area of ​​the localized aberration control function layer. Step 7: Superimpose the final surface shape of the localized aberration control functional layer onto the base surface of the base functional layer to form the working surface of the localized aberration control lens.

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