Localized aberration regulation lens and design method

Abstract

A localized aberration regulation lens and a design method, mainly solving the problems whereby in conventional microstructure lens designs, it is not possible to quantitatively regulate high-order aberrations, and it is not possible to customize and design lenses for individualized high-order aberrations of human eyes of wearers. Localized aberration regulation comprises: acquiring, by means of calculation, high-order aberrations generated by means of an initial structure of a lens in various viewing angle directions of a dynamic field-of-view of a human eye; and with reference to full-eye high-order aberrations of the human eye in the corresponding viewing angle directions, adjusting the face shape of a unit assembly (12) in a localized aberration regulation functional layer (11), thereby making the high-order aberrations generated by means of the lens reach or exceed a set threshold value. Under the effect of localized aberration regulation, the lens only corrects the high-order aberrations of the human eye at a central zero-degree viewing angle, so as to provide a high-definition imaging face; and in the remaining peripheral viewing angles, the lens does not correct the high-order aberrations of the human eye, and generated additional high-order aberrations are proportional to the high-order aberrations of the human eye, so that the eye can feel a balanced and significant peripherally blurred image face in the dynamic field-of-view.

Description

A localized aberration control lens and design method Technical Field

[0001] The present invention relates to an optical lens and a design method for refractive correction and imaging quality control, and in particular to a localized aberration control lens and a design method. Background Art

[0002] With the rapid increase in myopia rates, especially among high myopia patients, 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 becoming increasingly core issues in national eye health. In particular, the prevention and control of myopia in adolescents has shown sustained and rapid development in recent years across the industry, healthcare, and consumer sectors.

[0003] Microstructured frame lenses, typified by arrayed microlenses and microcylindrical lenses, have become a mainstream product for controlling myopia progression. Due to the positive refractive power of the microstructure, the optical mechanism of these microstructured frame lenses is often explained as a defocus effect on the retinal periphery. While the concept of defocus refers to the imaging wavefront of the entire eye, individual microlenses and microcylindrical lenses only produce isolated phase modulations in localized regions of the overall wavefront, without affecting the entire wavefront, and are therefore unrelated to the defocus effect. In reality, arrayed microlenses and microcylindrical lenses produce periodic phase perturbations on the overall imaging wavefront. Through wavefront decomposition, these wavefront perturbations correspond to higher-order aberrations. These higher-order aberrations diffuse the energy of the image point, blurring image detail and reducing contrast, resulting in a blurred visual experience for the lens wearer. Clearly, higher-order aberrations within the imaging wavefront are the key factor in the myopia control effect of microstructured frame lenses. Previously, this crucial factor has often been overlooked. The design, analysis and evaluation methods of the new generation of microstructured lenses around the theme of high-order aberrations need to be established urgently, and the related high-order aberration factors of the human eye itself also need to be considered in the design.

[0004] Summary of the Invention

[0005] In order to overcome the shortcomings of the background technology, the present invention provides a localized aberration control lens and a design method, which mainly targets the personalized human eye wavefront aberration, especially the high-order aberration, and solves the additional high-order aberration matching design problem of micro-structured lenses.

[0006] The technical solution adopted in the present invention is:

[0007] A localized aberration control lens, comprising

[0008] A base functional layer, wherein the base functional layer is a continuous and smooth base curved surface composed of a spherical surface, a spherocylinder surface, an aspherical surface, or a toric aspherical surface, and the base functional layer has a base refractive power that can correct the refractive error of the eye, and the refractive power at the center of the base functional layer is consistent with the refractive correction required by the optometry prescription; and

[0009] The localized aberration regulation functional layer covers the lens base functional layer and is a continuous or discontinuous free-form surface additional layer formed by regular or irregular arrangement and combination of free-form surface unit components. The localized aberration regulation functional layer has the function of adding high-order aberrations, which couples with the personalized high-order aberrations of the human eye within the dynamic field of view of the human eye, reshapes the imaging quality on the retina, and thereby controls the development of the refractive state of the eye.

[0010] The additional high-order aberrations generated by the localized aberration regulation functional layer within the pupil diameter range of 3 to 6 mm with the optical center of the lens as the center can correct the high-order aberrations of the human eye in the viewing angle direction, significantly improving the imaging quality.

[0011] The additional high-order aberrations generated by the localized aberration regulation functional layer within a pupil diameter range of 3 to 6 mm with a position 1 to 3 mm away from the optical center of the lens as the center can partially correct the high-order aberrations of the human eye in the corresponding viewing angle direction.

[0012] The additional high-order aberrations generated by the localized aberration regulation functional layer within the 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 high-order aberrations of the human eye in the corresponding viewing angle direction, and the imaging quality will therefore be reduced.

[0013] The localized aberration regulation functional layer includes a high-definition imaging working area, which is within a radius of 3 to 4 mm with the optical center of the lens as the center.

[0014] The localized aberration regulation functional layer includes a fuzzy imaging working area, the range of which is the area outside the high-definition imaging working area.

[0015] The surface shape of the high-definition imaging work area is the wavefront of the human eye's high-order aberrations at the central zero-degree viewing angle divided by the difference in refractive index between the lens material and air.

[0016] The fuzzy imaging workspace is composed of free-form surface unit components.

[0017] The surface shape of the free-form surface unit component is described by a high-order polynomial.

[0018] The root mean square value of the additional high-order aberrations within the pupil range generated by the localized aberration regulation functional layer in the blurred imaging working area reaches more than 10% of the RMS value of the high-order aberrations of the human eye at the corresponding viewing angle.

[0019] The localized aberration regulating functional layer is arranged on the base functional layer on the side of the lens facing the object and / or on the base functional layer on the side of the lens facing the eye.

[0020] The boundary contour of the free-form surface unit component is a polygon, a circle or an irregular closed curve shape.

[0021] The free-form surface unit components are arranged seamlessly and closely or sparsely in a fixed periodic or non-periodic manner.

[0022] The localized aberration regulating functional layer covers more than 40% of the area of ​​the lens base functional layer.

[0023] The additional high-order aberrations of the localized aberration control lens and the personalized high-order aberrations of the human eye are considered for the fovea of ​​the retina under the dynamic field of view of the human eye.

[0024] A method for designing a localized aberration-controlled lens as described above comprises the following steps:

[0025] Step 1: Establish an initial three-dimensional simulation model of the lens, including the lens center thickness and front and back surface profiles. The surface profile includes the base surface of the lens base functional layer and the initial surface of the localized aberration control functional layer. The initial surface is composed of free-form surface unit components described by high-order polynomials arranged in an array and initialized to a plane within a radius of 3 to 4 mm centered on the optical center of the lens.

[0026] 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 eyeball rotation center coordinate parameters;

[0027] Step 3: Reversely trace the principal ray starting from the center of eyeball rotation, along the predetermined eye gaze direction, after being refracted by the back and front surfaces of the lens, and then moving toward the object on the object side, and determine the coordinates of the object point at the given object distance;

[0028] Step 4: Starting from the object point coordinates determined in step 3, trace a large number of actual imaging light rays along the optical path until they reach the pupil of the eye after being refracted by the lens. 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 high-order aberrations generated by the lens in the corresponding viewing angle direction.

[0029] Step 5: At a zero-degree viewing angle and within a radius of 3 to 4 mm, the high-order wavefront aberrations produced by the lens at the same viewing angle obtained in step 4 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. The result is used as the surface shape of the high-definition imaging working area of ​​the localized aberration control functional layer;

[0030] Step 6: In the peripheral viewing angle direction, the imaging light path passes through the fuzzy imaging workspace, and the RMS values ​​of the lens's high-order wavefront aberrations obtained in Step 4 and the measured RMS values ​​of the human eye's high-order wavefront aberrations are calculated. If the ratio of the two is less than a preset threshold, the expression and coefficients of the high-order polynomial are adjusted to increase the surface amplitude and complexity of the free-form surface unit component. Step 4 is repeated until the above ratio is greater than the threshold; each viewing angle direction in the peripheral view is traversed to form the final surface shape of the fuzzy imaging workspace of the localized aberration control functional layer;

[0031] Step seven: superimpose the final surface shape of the localized aberration control functional layer onto the basic curved surface of the base functional layer to form the working surface of the localized aberration control lens.

[0032] The beneficial effects of the present invention are as follows: the localized aberration control lens proposed in the present invention gradually optimizes the surface shape of the localized aberration control functional layer of the lens in each viewing angle direction according to the measured high-order aberrations of the human eye, thereby forming a high-definition imaging work area in the center zero-degree viewing angle direction, and forming a balanced, stable and effective blurred imaging work area in the peripheral viewing angle direction. Because the personalized factors of the human eye's high-order aberrations are fully considered, the localized aberration control lens has personalized customization properties. In the case of a dynamic field of view, the lens wearer can significantly feel the change in imaging quality with the viewing angle. Compared with traditional micro-structured lenses that do not consider the human eye's own high-order aberration factors, the localized aberration control lens can present a more distinct and stable contrast between clear imaging and blurred imaging, and there is no problem of compensation for the human eye's high-order aberrations in the peripheral field of view, which can better play a role in controlling the development of refractive errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] FIG1 shows the initial structure of the localized aberration regulation functional layer of the present invention.

[0034] FIG2 is an initial free-form surface of the unit component constituting the localized aberration regulation functional layer in FIG1 .

[0035] FIG3 is a three-dimensional model of a dynamic field of view composed of a localized aberration control lens and a simplified eye according to the present invention.

[0036] FIG4 is a diagram showing the spatial light path tracing of the imaging light in each viewing angle direction in FIG3 .

[0037] FIG5 shows the output wavefronts generated by the localized aberration control lens in FIG4 in various viewing angle directions.

[0038] FIG6 is an improved free-form surface unit component for improving RMS high-order aberrations.

[0039] FIG7 shows the final structure of the localized aberration regulation functional layer according to the first embodiment of the present invention. DETAILED DESCRIPTION

[0040] The present invention will be further described below with reference to the accompanying drawings. As shown in the drawings, a localized aberration control lens includes a base functional layer 10, wherein the base functional layer is a continuous and smooth base curved surface composed of a spherical surface, a sphero-cylindrical surface, an aspherical surface, or a toric aspherical surface. The base functional layer has a base refractive power that can correct the refractive error of the eye. The refractive power at the center of the base functional layer is consistent with the refractive correction required by the optometry prescription; and

[0041] The localized aberration regulation functional layer 11 is covered on the lens base functional layer 10. It is a continuous or discontinuous free-form surface additional layer formed by regular or irregular arrangement and combination of free-form surface unit components 12. The localized aberration regulation functional layer has the function of adding high-order aberrations, which couples with the personalized high-order aberrations of the human eye within the dynamic field of view of the human eye, reshapes the imaging quality on the retina, and thus controls the development of the refractive state of the eye.

[0042] The additional high-order aberrations generated by the localized aberration regulation functional layer 11 within the pupil diameter range of 3 to 6 mm with the optical center of the lens as the center can correct the high-order aberrations of the human eye in the viewing angle direction, significantly improving the imaging quality.

[0043] The additional high-order aberrations generated by the localized aberration regulation functional layer 11 within a pupil diameter range of 3 to 6 mm with a position 1 to 3 mm away from the optical center of the lens as the center can partially correct the high-order aberrations of the human eye in the corresponding viewing angle direction.

[0044] The additional high-order aberrations generated by the localized aberration regulation functional layer 11 within the pupil diameter range of 3 to 6 mm with a position more than 3 mm away from the optical center of the lens as the center will not correct the high-order aberrations of the human eye in the corresponding viewing angle direction, and the imaging quality is therefore reduced.

[0045] The localized aberration regulation functional layer 11 includes a high-definition imaging working area within a radius of 3 to 4 mm with the optical center of the lens as the center.

[0046] The localized aberration regulation functional layer 11 includes a fuzzy imaging working area, the range of which is the area outside the high-definition imaging working area.

[0047] The surface shape of the high-definition imaging work area is the wavefront of the human eye's high-order aberrations at the central zero-degree viewing angle divided by the difference in refractive index between the lens material and air.

[0048] The fuzzy imaging workspace is composed of free-form surface unit components 12 .

[0049] The surface shape of the free-form surface unit component 12 is described by a high-order polynomial.

[0050] The root mean square value (RMS) of the additional high-order aberrations generated by the localized aberration regulation functional layer 11 within the pupil range in the blurred imaging working area reaches more than 10% of the RMS value of the high-order aberrations of the human eye at the corresponding viewing angle.

[0051] The localized aberration regulating functional layer 11 is arranged on the substrate functional layer 10 on the side of the lens facing the object and / or on the substrate functional layer 10 on the side of the lens facing the eye.

[0052] The boundary contour of the free-form surface unit component 12 is a polygon, a circle or an irregular closed curve shape.

[0053] The free-form surface unit components 12 are arranged seamlessly and closely or sparsely in a fixed periodic or non-periodic manner.

[0054] The localized aberration regulating functional layer 11 covers more than 40% of the area of ​​the lens base functional layer 10.

[0055] The additional high-order aberrations of the localized aberration control lens and the personalized high-order aberrations of the human eye are considered for the fovea of ​​the retina under the dynamic field of view of the human eye.

[0056] A method for designing a localized aberration-controlled lens as described above comprises the following steps:

[0057] Step 1: Establish an initial three-dimensional simulation model of the lens, including the lens center thickness and front and back surface profiles. The surface profile includes the base curve of the lens base functional layer 10 and the initial curve of the localized aberration control functional layer 11. The initial curve is composed of free-form surface unit components 12 described by high-order polynomials arranged in an array and initialized to a plane within a radius of 3 to 4 mm centered on the optical center of the lens.

[0058] 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 eyeball rotation center coordinate parameters;

[0059] Step 3: Reversely trace the principal ray starting from the center of eyeball rotation, along the predetermined eye gaze direction, after being refracted by the back and front surfaces of the lens, and then moving toward the object on the object side, and determine the coordinates of the object point at the given object distance;

[0060] Step 4: Starting from the object point coordinates determined in step 3, trace a large number of actual imaging light rays along the optical path until they reach the pupil of the eye after being refracted by the lens. 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 high-order aberrations generated by the lens in the corresponding viewing angle direction.

[0061] Step 5: At a zero-degree viewing angle (0), within a radius of 3 to 4 mm, subtract the high-order wavefront aberrations produced by the lens at the same viewing angle obtained in step 4 from the measured high-order wavefront aberrations of the human eye. The resulting wavefront of the remaining high-order aberrations is divided 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.

[0062] Step 6: In the peripheral viewing angle directions (specifically, viewing angles 1, 2, 3, 4, etc.), the imaging light path passes through the fuzzy imaging working area, and the RMS values ​​of the lens high-order wavefront aberrations obtained in step 4 and the measured RMS values ​​of the human eye high-order wavefront aberrations are respectively calculated. If the ratio of the two is less than a preset threshold, the expression and coefficients of the high-order polynomial are adjusted to increase the surface amplitude and complexity of the free-form surface unit component 13, and step 4 is repeated until the above ratio is greater than the threshold; each viewing angle direction of the peripheral area is traversed to form the final surface shape of the fuzzy imaging working area of ​​the localized aberration control functional layer;

[0063] Step seven: superimpose the final surface shape of the localized aberration control functional layer onto the basic curved surface of the base functional layer to form the working surface of the localized aberration control lens.

[0064] The localized aberration control lens design method includes the following steps:

[0065] (1) Establishing the initial simulation model of the lens

[0066] The lens structure includes a center thickness and front and back profiles, wherein the surface profile includes the base curve of the lens base functional layer and the initial free-form surface of the localized aberration control functional layer. The initial free-form surface is a microstructured surface composed of unit components described by high-order polynomials arranged in an array, wherein the initial free-form surface is initialized to a plane within a radius of 3 to 4 mm centered at the optical center of the lens.

[0067] A high-density point cloud method is used to represent the overall surface shape of the lens. The first-order and second-order partial derivatives of the surface shape are obtained through interpolation and numerical gradient algorithms, and the slope and normal direction of each point on the surface are quickly calculated in matrix form for subsequent ray tracing calculations.

[0068] (2) Establish a three-dimensional simulation model of the lens-eye combination

[0069] The lens-eye combination model simulates the application scenario of the lens when worn, specifically including the three-dimensional structure and tilt of the lens, the structure and rotational orientation of the eye model, etc. The eye model includes the size and position of the pupil and the coordinates of the eye's rotation center. The visual angle range and eye rotation angle corresponding to the scanning process from the lens center to the periphery are set.

[0070] (3) Chief ray tracing

[0071] The angle-by-angle inverse optical path calculation calculates the trajectory of the principal ray, starting from the center of eyeball rotation, passing through the center of the pupil, and then refracting through the back and front surfaces of the lens before intersecting the object plane in object space. This yields the object point spatial coordinates and principal ray path corresponding to each viewing angle. The object plane is a pre-constructed equidistant spherical surface. The ray tracing algorithm is based on the law of refraction in vector form and employs a successive approximation iterative algorithm to calculate the coordinates of the incident point and the exit direction of the ray on the lens surface.

[0072] (4) Calculation of the imaging wavefront of the lens

[0073] Starting from the object point coordinates in the viewing angle direction, a large number of actual imaging light rays are traced along the optical path. After being refracted through the lens' sub-aperture, they arrive at the reference spherical surface where the pupil plane of the eye is located. The lens' sub-aperture is matched to the pupil size. The optical path of each light 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 angle direction. The imaging wavefront is subjected to aberration decomposition and RMS higher-order aberrations are calculated.

[0074] (5) Construction of high-definition imaging workspace surface

[0075] The high-definition imaging working area of ​​the localized aberration control functional layer corresponds to the zero-degree viewing angle direction of the lens optical center, is a circular area with a radius of 3 to 4 mm, and is initially flat. The high-order wavefront aberrations generated by the lens at zero-degree viewing angle are subtracted from the measured high-order wavefront aberrations of the human eye. The resulting wavefront of the remaining high-order aberrations is divided by the difference in refractive index between the lens material and air, and this result is used as the surface shape of the high-definition imaging working area.

[0076] (6) Construction of the fuzzy imaging workspace surface

[0077] Select each peripheral viewing direction one by one, extract the lens's RMS high-order aberrations, and compare them with the measured RMS high-order aberrations of the human eye. If the ratio of the two is less than a pre-set threshold, adjust the polynomial and change the surface shape of the local unit components to improve the RMS high-order aberrations generated by the lens imaging in that viewing direction, ensuring that the ratio is greater than the threshold. After traversing each viewing direction, the final surface shape of the fuzzy imaging workspace of the localized aberration control functional layer is formed;

[0078] (7) Superimposing the final surface shape of the localized aberration control functional layer onto the base curved surface of the substrate functional layer to form the complete working surface of the localized aberration control lens.

[0079] The localized aberration regulation lens designed through the above steps includes a base functional layer and a localized aberration regulation functional layer.

[0080] The base functional layer is a continuous and smooth basic curved surface composed of a spherical surface, a spherical cylindrical surface, an aspherical surface or a toric aspherical surface, and has basic refractive power and can correct the refractive error of the eye.

[0081] The localized aberration regulation functional layer covers the lens area within a radius of 20 mm. It is a continuous or discontinuous free-form surface additional layer formed by regular or irregular arrangement and combination of free-form surface unit components. It has the function of adding high-order aberrations and can be coupled with the personalized high-order aberrations of the human eye in various viewing angles to reshape the imaging quality on the retina.

[0082] The additional high-order aberrations generated by the localized aberration regulation functional layer in the central zero-degree field of view direction can correct part or all of the high-order aberrations of the human eye, significantly improving the imaging quality.

[0083] The additional high-order aberrations generated by the localized aberration regulation functional layer in the field of view direction close to the center can partially correct the high-order aberrations of the human eye.

[0084] The additional high-order aberrations generated by the localized aberration regulation functional layer at a position more than 3 mm away from the optical center of the lens will not correct the high-order aberrations of the human eye, and the imaging quality will therefore be reduced.

[0085] The localized aberration-modulating functional layer includes a high-definition imaging workspace located in the center of the lens, within a radius of 3 to 4 mm from the lens' optical center. To correct for higher-order aberrations, the high-definition imaging workspace's surface shape is calculated by dividing the high-order aberration wavefront by the refractive index difference between the lens material and air.

[0086] The area outside the high-definition imaging working area is the fuzzy imaging working area of ​​the localized aberration control functional layer. The fuzzy imaging working area is composed of free-form surface unit components. The surface shape of the free-form surface unit component is a smooth surface described in the form of a high-order polynomial. The boundary contour of the unit component can be a polygon, a circle or an irregular closed curve shape. The unit components are arranged seamlessly or sparsely in a fixed periodic or non-periodic manner. The RMS value of the additional high-order aberrations generated by the fuzzy imaging working area must reach a specific proportion or above of the RMS value of the high-order aberrations of the human eye.

[0087] The localized aberration regulating functional layer is arranged on the surface of the lens facing the object and / or the surface of the lens facing the eye. The localized aberration regulating functional layer covers an area of ​​more than 40% of the surface of the lens.

[0088] The additional high-order aberrations of the localized aberration control lens and the personalized high-order aberrations of the human eye are considered for the fovea of ​​the retina under the dynamic field of view of the human eye.

[0089] The localized aberration control lens described in this embodiment has a convex surface, i.e., the front surface of the lens, which includes a spherical substrate and a localized aberration control functional layer covering it, and the inner surface can be spherical, aspherical, or toric. The working aperture of the lens is 60 mm. The material refractive index is 1.59, and the center thickness is 2.0 mm. The front surface of the lens has a surface curvature of 2.5 D, and the prescription power for far vision is -1.00 D. First, an initial design of the free-form surface unit component of the lens is performed. On this basis, a localized aberration control functional layer is formed by splicing and combining the unit components and superimposed on the substrate functional layer. Then, through spatial ray tracing simulation of a glasses-eye three-dimensional simulation model, the high-order aberrations of the lens in the imaging viewing angle direction are extracted and compared with the known high-order aberrations of the human eye, thereby improving the design of the free-form surface unit component. At the same time, the high-order aberrations of the human eye in the central zero-degree field of view are corrected to form the global morphology of the localized aberration control functional layer, thereby realizing the design and finalization of the localized aberration control lens.

[0090] This embodiment will be further described below with reference to the accompanying drawings.

[0091] Based on the above lens curvature and prescription power, it can be seen that the base functional layers on both the front and back surfaces of the lens are spherical. The localized aberration control functional layer is disposed on the front surface of the lens. In the specific embodiment of Figure 1 , the localized aberration control functional layer is composed of free-form surface unit components. Preferably, the unit components adopt a regular hexagonal outer profile and are assembled in a tightly fitting manner according to a fixed period. The initial surface shape within the central 3mm radius area of ​​the localized aberration control functional layer is flat.

[0092] FIG2 is an initial surface structure of the free-form surface unit component used in the specific embodiment of FIG1. ​​The initial surface structure is described by the following polynomial: S unit =(ax+by)[10(x 2 +y 2 ) 2 -12(x 2 +y 2 )+3]

[0093] The coefficient of the polynomial is a=b=0.15 μm.

[0094] Figure 3 is a three-dimensional model constructed using a localized aberration control lens and a simplified eye model. The front surface of the lens is covered with the localized aberration control functional layer shown in Figure 1. The eyeball rotation center is set on the central axis of the lens, 24 mm away from the back surface of the lens, and the pupil diameter is 6 mm. The line segments in Figure 3 represent the optical paths of the main rays, all starting from the eyeball rotation center. Each main ray represents a gaze direction. In the specific embodiment of Figure 3, five gaze directions are given, all at an azimuth angle of 45 degrees, including a central zero-degree viewing angle and four peripheral viewing angles. The main ray continues to extend on one side of the object space of the lens, and will intersect with the object plane to obtain the coordinates of the object point being looked at. When switching different viewing angles, the pupil rotates around the eye movement center with the eyeball, and the rotation radius is 14 mm.

[0095] Figure 4 illustrates the spatial ray tracing calculation of the imaging light emitted from the object point in the specific embodiment of Figure 3. The imaging light fills the pupil of the eye, with a sampling interval of less than 0.05 mm on the pupil plane. Light originates from the object point, refracts through the front and back surfaces of the lens, and terminates at the pupil plane of the eye.

[0096] FIG5 shows the output wavefronts of the lens at various viewing angles by comparing the total optical path of each ray with the optical path of the principal ray in the embodiment of FIG4 . The output wavefront at the central zero-degree viewing angle is a regular rotationally symmetrical surface with relatively few high-order aberration components. The peripheral viewing angles (1-4) pass through the blurred working area of ​​the localized aberration control functional layer, and the output wavefront contains a rich set of high-order aberrations. The RMS high-order aberrations for these four peripheral viewing angles are calculated to be 0.153μm, 0.151μm, 0.150μm, and 0.140μm, respectively.

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

[0098] If the ratio of the RMS high-order wavefront aberrations generated by the lens to the RMS high-order wavefront aberrations of the human eye is required to be no less than 90%, the embodiments of Figures 1 to 5 do not meet this threshold requirement. Therefore, it is necessary to improve the localized aberration control functional layer and unit components in Figures 1 and 2. Figures 6 and 7 respectively show the improved and optimized free-form surface unit components and the corresponding localized aberration control functional layer.

[0099] The unit component surface shape in Figure 6 is realized by adding a high-order polynomial based on the surface shape in Figure 2. The surface shape is described by the following polynomial: S unit =(ax+by)[10(x 2 +y 2) 2 -12(x 2 +y 2 )+3]... +c[20(x 2 +y 2 ) 3 -30(x 2 +y 2 ) 2 +12(x 2 +y 2 )]

[0100] The coefficients of the polynomial are a=b=0.15 μm, c=0.10 μm, and the component maintains a regular hexagonal outer contour.

[0101] Figure 7 shows the improved and optimized localized aberration control functional layer of this embodiment. The blurred imaging working area is formed by tightly splicing the freeform surface unit components shown in Figure 6. To correct the human eye's high-order aberrations at the central zero-degree viewing angle, the high-definition imaging working area within a central 3mm radius is filled with a topography derived from the wavefront of the wearer's high-order aberrations (currently only primary spherical aberration) divided by the refractive index difference between the lens material and air.

[0102] The improved and optimized localized aberration control functional layer in Figure 7 was re-imported into Figures 3 and 4, and spatial ray tracing was performed at each viewing angle to obtain the output wavefront of the lens imaging, and the RMS high-order aberrations at the peripheral viewing angles were calculated. The results were 0.199μm, 0.197μm, 0.197μm, and 0.182μm, respectively, all exceeding the set threshold of 90% of the RMS high-order wavefront aberration of the human eye and meeting the design requirements.

[0103] The present invention is not limited to the embodiments shown, and the design method is not limited by the lens material, surface curvature, size and processing degree. The localized aberration regulation functional layer can be superimposed on the surface layer of the lens, or it can be built into the interlayer of the lens by localizing the refractive index change. The lens comprehensively considers the wearer's personalized wavefront aberration factors and adopts a customized design concept. It can regulate the imaging quality through the action of high-order aberrations within the dynamic field of view of the human eye, and can make limited and effective adjustments to the visual quality while correcting the refractive error of the human eye, thereby playing a role in regulating the progress of the eye's refractive development. The design method is not limited to frame glasses, but is also applicable in the field of contact lenses such as contact lenses.

Claims

1. A localized aberration control lens, characterized in that: include A base functional layer (10), wherein the base functional layer is a continuous and smooth base curved surface composed of a spherical surface, a sphero-cylindrical surface, an aspherical surface or a toric aspherical surface, and the base functional layer has a base refractive power, and the refractive power at the center of the base functional layer is consistent with the refractive correction required by the optometry prescription; and A localized aberration regulation functional layer (11) covers the lens base functional layer (10), and is a continuous or discontinuous free-form surface additional layer formed by regular or irregular arrangement and combination of free-form surface unit components (12). The localized aberration regulation functional layer has an additional high-order aberration effect, and is coupled with personalized high-order aberrations of the human eye within the dynamic field of view of the human eye, thereby reshaping the imaging quality on the retina and controlling the development of the refractive state of the eyeball.

2. The localized aberration control lens according to claim 1, characterized in that: The additional high-order aberrations generated by the localized aberration regulating functional layer (11) within a pupil diameter range of 3 to 6 mm with the optical center of the lens as the center can correct the high-order aberrations of the human eye in the viewing angle direction.

3. The localized aberration control lens according to claim 1, characterized in that: The additional high-order aberrations generated by the localized aberration regulating functional layer (11) within a pupil diameter range of 3 to 6 mm with a position 1 to 3 mm away from the optical center of the lens as the center can partially correct the high-order aberrations of the human eye in the corresponding viewing angle direction.

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

5. The localized aberration control lens according to claim 2, characterized in that: The localized aberration regulating functional layer (11) comprises a high-definition imaging working area, the range of which is within a radius of 3 to 4 mm with the optical center of the lens as the center.

6. The localized aberration control lens according to claim 5, characterized in that: The localized aberration regulation functional layer (11) comprises a fuzzy imaging working area, the range of which is the area outside the high-definition imaging working area.

7. The high-definition imaging working area of ​​the localized aberration regulation functional layer (11) according to claim 5, characterized in that: The surface shape of the high-definition imaging work area is the wavefront of the human eye's high-order aberrations at the central zero-degree viewing angle divided by the difference in refractive index between the lens material and air.

8. The fuzzy imaging working area of ​​the localized aberration regulation functional layer according to claim 6, characterized in that: The fuzzy imaging working area is composed of a free-form surface unit component (12).

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

10. The localized aberration control lens according to claim 6, characterized in that: The root mean square value of the additional high-order aberrations generated by the localized aberration regulating functional layer (11) within the pupil range in the blurred imaging working area reaches more than 10% of the RMS value of the high-order aberrations of the human eye at the corresponding viewing angle.

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

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

13. The localized aberration control lens according to claim 1, characterized in that: The free-form surface unit components (12) are arranged closely or sparsely without gaps in a fixed periodic or non-periodic manner.

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

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

16. A method for designing a localized aberration control lens according to any one of claims 1 to 15, characterized in that: The steps include: Step 1, establishing an initial three-dimensional simulation model of the lens, including the lens center thickness and the front and rear surface shapes, wherein the surface shape includes a basic curved surface of the lens base functional layer (10) and an initial curved surface of the localized aberration regulation functional layer (11); the initial curved surface is composed of free-form surface unit components (12) described by high-order polynomials in an array arrangement, and is initialized as a plane within a radius of 3 to 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, eyeball rotation center coordinate parameters; Step 3: reversely trace the principal ray starting from the rotation center of the eyeball, moving along the predetermined eye gaze direction, refracting through the rear and front surfaces of the lens, moving toward the object on the object plane side, and determining the coordinates of the object point at a given object distance; Step 4: Starting from the object point coordinates determined in step 3, a large number of actual imaging light rays are traced along the optical path, and after being refracted by the lens, they reach the pupil position of the eye. The total optical path of each light ray is calculated, and the total optical path is subtracted from the optical path of the main light ray to obtain the imaging wavefront and additional high-order aberrations generated by the lens in the corresponding viewing angle direction; Step 5: In the direction of zero-degree viewing angle (0), within a radius of 3 to 4 mm, the high-order wavefront aberrations generated by the lens at the same viewing angle obtained in step 4 are subtracted from the measured high-order wavefront aberrations of the human eye, and the wavefront of the remaining high-order aberrations is divided by the difference in refractive index between the lens material and air, and the result is used as the surface shape of the high-definition imaging working area of ​​the localized aberration regulation functional layer; Step 6: In the peripheral viewing angle direction, the imaging light path passes through the fuzzy imaging work area, and the RMS value of the lens high-order wavefront aberration obtained in step 4 and the RMS value of the measured human eye high-order wavefront aberration are calculated respectively. If the ratio of the two is less than a preset threshold, the expression and coefficient of the high-order polynomial are adjusted to increase the surface amplitude and complexity of the free-form surface unit component (12), and step 4 is repeated until the above ratio is greater than the threshold; each viewing angle direction of the peripheral is traversed to form the final surface shape of the fuzzy imaging work area of ​​the localized aberration regulation functional layer; Step seven, superimposing the final surface shape of the localized aberration regulation functional layer onto the base curved surface of the substrate functional layer to form the working surface of the localized aberration regulation lens.

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