A corrective lens design apparatus, storage medium and lens

Abstract

The application discloses a kind of corrective lens design equipment, storage medium and lens, it is related to medical equipment field, for solving the problem of existing refractive correction improves visual acuity or the effect of improving visual quality is poor.Refractive lens design equipment includes acquisition device, selection device and design device, acquisition device obtains the central refractive power of target individual eyeball, selection device finds out target refractive topography from refractive topography group, central refractive power is in the central refractive power range corresponding to target refractive topography, and refractive topography describes the retinal refractive power distribution of eyeball with corresponding central refractive power in preset field angle;Design device obtains refractive power distribution correction scheme in conjunction with target refractive topography, to obtain the corrective lens for target individual.The present application combines the peripheral defocus characteristics of human eye retina to design semi-personalized lens for individual, to achieve the purpose of improving visual acuity, improving myopia prevention and control effect or improving peripheral visual quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical equipment, in particular to a corrective lens design device, a storage medium and a lens. BACKGROUND

[0002] In clinical practice, some patients with central visual impairment such as macular degeneration and macular hole often face the problem that the visual acuity of the patients is improved to a limited extent after the existing refractive correction and lens matching technology is used for visual correction, and the patients still cannot achieve normal visual acuity. In addition, some patients with refractive errors, especially in recent years, the incidence of myopia has been increasing year by year, and the population of high myopia has gradually increased. Although most refractive errors can achieve normal visual acuity through existing visual correction technology, some myopia patients, especially high myopia patients, cannot achieve normal visual acuity or have poor visual quality even if no obvious fundus lesions are found.

[0003] It is found through research that the above problems are caused by the fact that almost all lenses in existing optometry and lens matching are designed to correct central visual acuity as the target, and peripheral visual acuity and peripheral visual acuity correction are ignored. In fact, peripheral defocus plays an important role in the development of the human eye and the progression of myopia.

[0004] Optical defocus of the human eye refers to the fact that the imaging focal point is not on the retina. If the optical focal point is imaged in front of the retina, it is myopic defocus, and if it is imaged behind the retina, it is hyperopic defocus. In theory, when the light entering the eyeball is all focused on the retina, the vision is the clearest, and otherwise, if the imaging is located in front of the retina (i.e. myopic defocus) or behind the retina (i.e. hyperopic defocus), the vision is relatively blurred. The refractive state or defocus state of the naked eye is determined by the refractive medium of the eyeball and the retinal morphology. The refractive medium mainly includes the cornea, the aqueous humor, the lens and the vitreous body, and the retinal morphology is mainly determined by the shape of the eyeball. As we all know, the refractive power of the cornea is different in different regions, and the refractive power of the lens and the vitreous body also differs in the same sagittal plane. Moreover, the fundus morphology of most myopia patients, especially high myopia patients, is not regular spherical or spherical. This leads to the fact that the retinal imaging focal point in different regions of the retina in the naked state of the human eye will exhibit different defocus states. Therefore, in an ideal state, the refractive error of the human eye needs to be fully corrected by adapting to the personalized refractive power distribution lens, which not only corrects the central refractive power, but also corrects the peripheral refractive power, and the refractive power distribution surface is not a uniform spherical surface.

[0005] For a long time, limited by the development of peripheral refractive error measurement technology, it has been difficult to obtain the refractive state of the entire eyeball. Traditional lens fitting techniques are based on the assumption that the eyeball is a regular spherical shape, ignoring the existence and differences of peripheral defocus. They aim to correct central refractive error, assuming that the eyeball is a perfect sphere or that the refractive error of the entire retina is approximately equal, and that the peripheral refractive error is uniform and homogeneous, thus producing uniform and homogeneous lenses. However, in reality, the distribution of retinal refractive error is different for each individual, making each person unique. Therefore, lenses made using traditional techniques cannot fully correct peripheral refractive errors, resulting in poor visual quality and blurred peripheral vision.

[0006] In recent years, with the development of peripheral retinal refractive error measurement technology, various peripheral defocus lenses have begun to be used. However, the effectiveness in controlling myopia varies among different lens types and individuals. Completely personalized peripheral defocus lenses require a full retinal refractive error measurement for each individual before personalized manufacturing, significantly increasing the costs of clinical testing, design optimization, and production. Therefore, it is difficult to make these lenses available to the majority of people who need them.

[0007] Therefore, the ability to design lenses that take into account the peripheral defocus characteristics of the human retina and are tailored to the individual, correcting not only central vision but also paracentral and peripheral vision in order to improve visual acuity and visual quality, is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0008] The purpose of this invention is to provide a corrective lens design device and a computer-readable storage medium that takes into account the peripheral defocus characteristics of the human retina to design semi-personalized lenses for each individual, thereby improving vision and visual quality. This invention also provides a lens.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A corrective lens design device, comprising:

[0011] Acquisition device, used to acquire the central refractive power of the target individual's eyeball;

[0012] A selection device is used to find a target refractive topographic map corresponding to the central refractive power from a set of refractive topographic maps, based on the central refractive power. The central refractive power is within the range of the central refractive power corresponding to the target refractive topographic map. Any one of the refractive topographic maps in the set of refractive topographic maps describes the retinal refractive power distribution of an eyeball with a corresponding central refractive power within a preset field of view. The refractive topographic map is obtained by statistically processing the retinal refractive power data of multiple individual eyes with corresponding central refractive powers within the preset field of view.

[0013] Design device for combining the target refractive topography map to derive a refractive power distribution correction scheme for the target individual's eyeball, so as to obtain corrective lenses for the target individual.

[0014] In some embodiments, a construction device is also included for constructing the set of refractive topographic maps, the construction device being used for:

[0015] For each individual in the preset population, the refractive power of the individual's eyeball at different points within the preset field of view of the retina is measured to obtain the refractive power data of the individual's eyeball at different points within the preset field of view of the retina;

[0016] The preset population is divided into m groups. The central refractive power of the eyeballs of individuals belonging to the same group is within the range of the central refractive power of the corresponding group, where m is a positive integer greater than or equal to 2.

[0017] For each group of m individuals, the average refractive error data of the same location on the eyeball of each individual in the group is calculated to obtain the averaged refractive error distribution data of the group.

[0018] For each group of m individuals, the averaged refractive error distribution data of this group is subjected to rotational symmetry fitting, and the refractive error topography map of this group is obtained based on the fitted refractive error distribution data.

[0019] In some embodiments, a construction device is also included for constructing the set of refractive topographic maps, the construction device being used for:

[0020] For each individual in the preset population, the refractive power of the individual's eyeball at different points within the preset field of view of the retina is measured to obtain the refractive power data of the individual's eyeball at different points within the preset field of view of the retina;

[0021] The preset population is divided into m groups. The central refractive power of the eyeballs of individuals belonging to the same group is within the range of the central refractive power of the corresponding group, where m is a positive integer greater than or equal to 2.

[0022] For each group of m individuals, the average refractive error data of the same location on the eyeball of each individual in the group is calculated to obtain the averaged refractive error distribution data of the group.

[0023] For each of the m groups of individuals, the retina of the individual's eyeball is divided into multiple regions according to the eccentricity. For each of the multiple regions, the average of the data of each point belonging to the region in the averaged refractive power distribution data of the group is calculated to obtain the refractive power topography map of the group.

[0024] In some implementations, dividing the retina of an individual eye into multiple regions based on eccentricity includes:

[0025] Based on the eccentricity, the retina of an individual's eyeball is divided into multiple regions with a preset eccentricity step size.

[0026] In some embodiments, a construction device is also included for constructing the set of refractive topographic maps, the construction device being used for:

[0027] For each individual in the preset population, the refractive power of the individual's eyeball at different points within the preset field of view of the retina is measured to obtain the refractive power data of each point of the individual's eyeball on the retina within the preset field of view.

[0028] For each individual in the preset population, the relative defocus data of the individual's eyeball at each point of the retina within the preset field of view is obtained based on the refractive power data of that individual's eyeball at each point of the retina within the preset field of view.

[0029] The preset population is divided into m groups. The central refractive power of the eyeballs of individuals belonging to the same group is within the range of the central refractive power of the corresponding group, where m is a positive integer greater than or equal to 2.

[0030] For each group of m individuals, the average relative defocus data of the same location on the eyeball of each individual in the group is calculated to obtain the averaged relative defocus distribution data of the group.

[0031] For each group of m individuals, the averaged relative defocus distribution data of this group is subjected to rotational symmetry fitting, and the refractive topographic map of this group is obtained based on the fitted relative defocus distribution data.

[0032] In some embodiments, the design device is used to derive a refractive power distribution correction scheme for the target individual's eyeball by combining the target refractive power topography map, to obtain corrective lenses for the target individual, including:

[0033] The design device is used to delineate the central correction zone and the peripheral correction zone of the retina of the target individual's eyeball, and combine the target refractive topography map to obtain a refractive power distribution correction scheme for the central correction zone and / or the peripheral correction zone of the target individual's eyeball, so as to obtain a corrective lens for the target individual's eyeball.

[0034] In some embodiments, the design device is used to derive a refractive power distribution correction scheme for the target individual's eyeball by combining the target refractive power topography map, to obtain corrective lenses for the target individual, including:

[0035] The design device is used to combine the target refractive topography map and positive / negative lenses to derive a refractive power distribution correction scheme for the central correction zone of the target individual's eyeball.

[0036] In some embodiments, the design device is used to derive a refractive power distribution correction scheme for the target individual's eyeball by combining the target refractive power topography map, to obtain corrective lenses for the target individual, including:

[0037] The design device is used to perform basic correction based on the target refractive topography map and to perform defocus increment on the peripheral correction area of ​​the target individual's eyeball, thereby obtaining a refractive power distribution correction scheme for the peripheral correction area of ​​the target individual's eyeball.

[0038] A computer-readable storage medium having a computer program stored thereon, the computer program performing the following process when executed by a processor:

[0039] Obtain the central refractive power of the target individual's eyeball;

[0040] Based on the central refractive power, a target refractive power topographic map corresponding to the central refractive power is found from the refractive power topographic map group. The central refractive power is within the range of the central refractive power corresponding to the target refractive power topographic map. Any of the refractive power topographic maps in the refractive power topographic map group describes the retinal refractive power distribution of an eyeball with a corresponding central refractive power within a preset field of view. The refractive power topographic map is obtained by statistically processing the retinal refractive power data of multiple individual eyes with corresponding central refractive powers within the preset field of view.

[0041] By combining the target refractive topography map, a refractive power distribution correction scheme for the target individual's eyeball is derived, so as to obtain a corrective lens for the target individual.

[0042] A lens, designed using any of the corrective lens design devices described above.

[0043] As can be seen from the above technical solution, the corrective lens design device provided by the present invention includes an acquisition device, a selection device, and a design device. The acquisition device is used to acquire the central refractive power of the target individual's eyeball. The selection device is used to find the target refractive power topography map corresponding to the central refractive power from the refractive power topography map group based on the central refractive power. The central refractive power is within the range of the central refractive power corresponding to the target refractive power topography map. Any refractive power topography map in the refractive power topography map group describes the retinal refractive power distribution of an eyeball with a corresponding central refractive power within a preset field of view. The refractive power topography map is obtained by statistically processing the retinal refractive power data of multiple individual eyes with corresponding central refractive powers within the preset field of view. The design device is used to combine the target refractive power topography map to derive a refractive power distribution correction scheme for the target individual's eyeball, so as to obtain a corrective lens for the target individual. The beneficial effect of this invention is that, based on the refractive topography map corresponding to the central refractive power of the target individual, a refractive power distribution correction scheme for the target individual's eyeball is designed. The refractive topography map describes the retinal refractive power distribution of the eyeball with the corresponding central refractive power within a preset field of view. By taking into account the peripheral defocus characteristics of the human retina, semi-personalized lenses are designed for the individual to improve vision and visual quality.

[0044] The present invention provides a computer-readable storage medium that can achieve the above-mentioned beneficial effects.

[0045] The lens provided by this invention is a semi-personalized lens designed for individuals, taking into account the peripheral defocus characteristics of the human retina, in order to improve vision and visual quality. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of a corrective lens design device provided in an embodiment of the present invention;

[0048] Figure 2 A flowchart illustrating a method for constructing a refractive topographic map using a lens design device according to an embodiment of the present invention;

[0049] Figure 3 Flowchart of a method for constructing a refractive topographic map using a construction apparatus for a corrective lens design device according to another embodiment of the present invention;

[0050] Figure 4 Cross-sectional views before and after fitting hyperopic retinal defocus;

[0051] Figure 5 A schematic diagram of retinal defocusing in the human eye;

[0052] Figure 6 This is a flowchart illustrating the design of a corrective lens device according to an embodiment of the present invention. Detailed Implementation

[0053] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0054] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a corrective lens design device provided in this embodiment. As shown in the figure, the corrective lens design device includes:

[0055] Acquisition device 101 is used to acquire the central refractive power of the target individual's eyeball;

[0056] The selection device 102 is used to find a target refractive topographic map corresponding to the central refractive power from the refractive topographic map group based on the central refractive power. The central refractive power is within the range of the central refractive power corresponding to the target refractive topographic map. Any refractive topographic map in the refractive topographic map group describes the retinal refractive power distribution of an eyeball with a corresponding central refractive power within a preset field of view. The refractive topographic map is obtained by statistically processing the retinal refractive power data of multiple individual eyes with corresponding central refractive powers within the preset field of view.

[0057] Design device 103 is used to combine the target refractive topography map to derive a refractive power distribution correction scheme for the target individual's eyeball, so as to obtain a corrective lens for the target individual.

[0058] A set of refractive topographic maps includes at least two refractive topographic maps, each corresponding to a different central refractive power range. Each refractive topographic map describes the retinal refractive power distribution within a preset field of view for an eye whose central refractive power falls within the corresponding central refractive power range. The preset field of view is greater than 0°, meaning that the refractive topographic map describes the refractive power distribution of an eye with a corresponding central refractive power, including the central and peripheral retina. Retinal refractive power distribution refers to the refractive power at different locations on the retina of the eye.

[0059] The corrective lens design device in this embodiment designs a refractive power distribution correction scheme for the target individual's eyeball based on the refractive power topography map corresponding to the central refractive power of the target individual. The refractive power topography map describes the retinal refractive power distribution of the eyeball with the corresponding central refractive power within a preset field of view. Therefore, by taking into account the peripheral defocus characteristics of the human retina, a semi-personalized lens is designed for the individual to improve visual quality and enhance the function and effect of special defocus lenses, such as improving visual acuity, improving myopia control, or improving peripheral visual quality.

[0060] In this embodiment, the type and structure of the acquisition device 101 are not limited, as long as it can measure and obtain the central refractive power of the target individual's eyeball.

[0061] In this embodiment, the number of refractive topographic maps included in the refractive topographic map group is not limited, nor is the central refractive range corresponding to each refractive topographic map limited. In practical applications, the settings can be made according to the distribution of peripheral refractive power of the retina and the characteristics of peripheral refractive power of the retina with different central refractive powers in the general population.

[0062] In this embodiment, the specific method for statistically processing the retinal refractive power data of multiple individual eyes within a preset field of view to obtain a refractive topography map is not limited. In some embodiments, this corrective lens design device may further include a construction device 104 for constructing the set of refractive topography maps, which can be referred to... Figure 2 , Figure 2 A flowchart of a method for constructing a refractive topographic map using a constructing apparatus for a corrective lens design device according to an embodiment, wherein the constructing apparatus 104 is used to perform the following steps:

[0063] S11: For each individual in the preset population, measure the refractive power of the individual's eyeball at different points within the preset field of view of the retina, and obtain the refractive power data of the individual's eyeball at different points within the preset field of view of the retina;

[0064] S12: Divide the preset population into m groups. The central refractive power of the eyeballs of individuals belonging to the same group is within the range of the central refractive power of the corresponding group. m is a positive integer greater than or equal to 2.

[0065] S13: For each group of m individuals, the average refractive error data of the same location on the eyeball of each individual in the group is calculated to obtain the averaged refractive error distribution data of the group.

[0066] S14: For each group of m individuals, perform rotational symmetry fitting on the averaged refractive power distribution data of this group, and obtain the refractive power topography map of this group based on the fitted refractive power distribution data. Alternatively, divide the retina of the individual eyeball into multiple regions based on eccentricity, and for each of the multiple regions, average the data of each point belonging to this region in the averaged refractive power distribution data of this group to obtain the refractive power topography map of this group.

[0067] The preset population refers to a group of individuals. In this embodiment, the number of individuals included in the preset population is not limited. The specific value of the preset field of view is not limited; in practical applications, it can be selected based on the impact of peripheral retinal defocus on visual acuity and visual quality. For example, the preset field of view can be, but is not limited to, 60°. Uncorrected retinal refractive error is measured for each individual in the preset population, and the detection range is an adjustable range that covers the field of view within 60°.

[0068] Refractive power data can be equivalent spherical power values ​​or other data characterizing refractive power. The obtained refractive power data of different retinal sites within a preset field of view for an individual eye can be represented as matrix-sampled dot matrix data. For example, detecting the equivalent spherical power of n retinal sites, where n is a positive integer greater than or equal to 2, can be represented as: SE1, SE2, SE3, ..., SE n The refractive power data for each point is represented as (x, y, SE), where x represents the horizontal field of view, y represents the vertical field of view, and SE represents the equivalent spherical power for that point. A database is established using the matrix sample dot matrix data obtained from uncorrected peripheral retinal refractive power measurements on a sample population.

[0069] Divide the population into m central refractive error ranges, and correspondingly divide the target population into m groups, i.e., divide the obtained refractive error data into m groups (G1, G2, G3, ..., Gm). For any individual, if the individual's central refractive error falls within the i-th central refractive error range, then the individual is assigned to the i-th group, and the i-th group corresponds to the i-th central refractive error range, i∈[1, m]. Dividing the population into m groups will result in m refractive error topographic maps. For example, the population can be divided into 6 groups, including: G1 hyperopia group (+0.5, 5]D, G2 emmetropia group (-0.5, +0.5]D, G3 low myopia group (-2, -0.5]D, G4 moderate myopia group (-4, -2]D, G5 high myopia group (-6, -4]D), G6 very high myopia group (-12, -6]D, etc. Alternatively, the population can be grouped according to a central refractive error step size of 0.5D or 1D.

[0070] For each of the m groups of individuals, the refractive error data at the same location from all individuals in that group are averaged to obtain the averaged refractive error distribution data for that group. The averaged refractive error distribution data can still be represented as matrix sample data. The averaged refractive error distribution data for the i-th group is represented as: SE1 Gi SE2 Gi SE3 Gi ,……,SE n Gi The mean refractive power data for each point is represented as (x, y, SE). Gi ).

[0071] For each group of m individuals, the averaged refractive error distribution data of that group is subjected to rotational symmetry fitting. The resulting refractive error topography is then used to obtain the refractive error distribution data for that group. Specifically, the fitted refractive error distribution data can be used as the refractive error topography for that group. Rotational symmetry fitting of the averaged refractive error distribution data ensures that points at the same eccentricity have the same refractive error. This allows for the design of refractive error correction schemes based on the obtained refractive error topography to minimize interference with central vision. If rotational symmetry fitting is not performed on the averaged refractive error distribution data, peripheral retinal defocus varies irregularly, potentially resulting in different refractive errors at the same eccentricity. Using this refractive error topography for refractive correction would affect central vision, creating disordered astigmatism that impacts central vision. An example can be found by referring to... Figure 4 , Figure 4 The images show cross-sectional views before and after fitting hyperopic retinal defocus. Before fitting, the peripheral defocus of the retina changes irregularly. By fitting, the points with the same eccentricity have uniform refractive power.

[0072] In some implementations, a set of averaged refractive error distribution data is subjected to rotational symmetry fitting with the visual axis as the rotation axis. Since the fovea centralis is located on the visual axis and at the center of the retinal refractive error distribution, it is the region with the highest visual acuity. Using the visual axis as the rotation axis can minimize the impact of peripheral refractive correction on central vision. This is because regardless of how the refractive correction scheme for the peripheral retina is designed, central visual function must be guaranteed first.

[0073] Alternatively, the retina of an individual's eye can be divided into multiple regions based on eccentricity. Eccentricity corresponds to the field of view, which is the visual field angle corresponding to the eccentricity range of the retina. In this embodiment, the specific method of dividing the retina of an individual's eye into multiple regions based on eccentricity is not limited. In some embodiments, the retina of an individual's eye can be divided into multiple regions based on eccentricity with a preset eccentricity step size. For example, with a step size of 4°, a peripheral refractive topographic map within a 16° range can be divided into four regions.

[0074] For each of the multiple regions, the average data of each point belonging to that region in the averaged refractive power distribution data of the group is averaged, and the resulting average data of the region is used as the refractive power data of each point in that region. This process is repeated to obtain the refractive power topographic map of the group. For example, with a step size of 4°, the peripheral refractive power topographic map within a 16° range can be divided into four regions, corresponding to four refractive power values. Finally, m discontinuous refractive power topographic maps with step-like variations are obtained.

[0075] In some embodiments, the corrective lens design device may further include a construction device 104 for constructing the set of refractive power topographic maps, as can be referred to. Figure 3 , Figure 3 A flowchart illustrating a method for constructing a refractive topographic map using a construction apparatus for a corrective lens design device according to another embodiment, wherein the construction apparatus 104 is used to perform the following steps:

[0076] S21: For each individual in the preset population, measure the refractive power of the individual's eyeball at different points within the preset field of view of the retina, and obtain the refractive power data of each point of the individual's eyeball on the retina within the preset field of view;

[0077] S22: For each individual in the preset population, based on the refractive power data of each point on the retina of the individual's eyeball within the preset field of view, obtain the relative defocus data of each point on the retina of the individual's eyeball within the preset field of view;

[0078] S23: Divide the preset population into m groups. The central refractive power of the eyeballs of individuals belonging to the same group is within the range of the central refractive power of the corresponding group. m is a positive integer greater than or equal to 2.

[0079] S24: For each group of m individuals, the average relative defocus data of the same location on the eyeball of each individual in the group is calculated to obtain the averaged relative defocus distribution data of the group.

[0080] S25: For each group of individuals in the m groups, perform rotational symmetry fitting on the averaged relative defocus distribution data of this group, and obtain the refractive topographic map of this group based on the fitted relative defocus distribution data.

[0081] In this embodiment, steps S21 and S23 can be referred to the specific implementations of steps S11 and S12 in the previous embodiment, and will not be repeated here.

[0082] The relative defocus data at any given point refers to the difference between the refractive power at that point and the central refractive power. The relative defocus data at any given point can be, but is not limited to, the refractive power value at that point minus the central refractive power value. The relative defocus data of different points within a preset field of view of the retina obtained for an individual eye can also be represented as matrix-sampled dot matrix data, denoted as: D1, D2, D3, ..., D n The relative defocus data of each point is represented as (x, y, D), where D represents the relative defocus value of that point.

[0083] For each of the m groups of individuals, the relative defocus data of the same location from all individuals in the group are averaged to obtain the averaged relative defocus distribution data for that group. The averaged relative defocus distribution data can still be represented as matrix sample data. The averaged relative defocus distribution data of the i-th group is represented as: D1 Gi D2 Gi D3 Gi ,……,D n Gi The average relative out-of-focus data for each point is represented as (x, y, D). Gi ).

[0084] For each of the m groups of individuals, the averaged relative defocus distribution data of that group is subjected to rotational symmetry fitting. The resulting refractive topography map is then obtained based on the fitted relative defocus distribution data. Specifically, the fitted relative defocus distribution data can be used as the refractive topography map for that group. In some implementations, the averaged relative defocus distribution data of a group can be subjected to rotational symmetry fitting with the visual axis as the rotation axis. For the i-th group, the obtained averaged relative defocus distribution data of the i-th group can be subjected to rotational symmetry fitting, and the fitted relative defocus data is used as the refractive topography map of the i-th group, resulting in m refractive topography maps.

[0085] In this embodiment, the specific method by which the design device 103 designs a refractive power distribution correction scheme for the target individual in conjunction with the target refractive power topography map is not limited. In some embodiments, the design device 103 is used to delineate a central correction zone and a peripheral correction zone on the retina of the target individual's eyeball, and, in conjunction with the target refractive power topography map, derive a refractive power distribution correction scheme for the central correction zone and / or the peripheral correction zone of the target individual's eyeball, so as to obtain a corrective lens for the target individual's eyeball.

[0086] In this embodiment, the method for delineating the central correction zone and the peripheral correction zone of the retina of the target individual's eyeball is not limited, and can be set according to the needs. For example, the central correction zone can be set within a range of 5° eccentricity, and the peripheral correction zone can be set within a range of 5° to 60°.

[0087] In some embodiments, the design device 103 is used to combine the target refractive topography and the positive / negative lens to derive a refractive power distribution correction scheme for the central correction zone of the target individual's eyeball. See reference. Figure 5 , Figure 5 This diagram illustrates retinal defocus in the human eye. Optical defocus in the human eye refers to the image focal point not being on the retina. If the optical focal point is in front of the retina, it is myopic defocus; if it is behind the retina, it is hyperopic defocus. Relative peripheral refraction (RPR) refers to the difference between the refractive power of the image in the peripheral area of ​​the retina and the central refractive power. When the peripheral refractive power is greater than the central refractive power, it is a positive value. If corrected according to the central refractive power, the image point falls behind the retina, resulting in relative hyperopic defocus in the periphery. When the peripheral refractive power is less than the central refractive power, it is a negative value. If corrected according to the central refractive power, the image point falls in front of the retina, resulting in relative myopic defocus in the periphery.

[0088] In this embodiment, a target refractive topographic map SE′ combined with a positive lens can be used to achieve central refractive correction, with the peripheral retinal imaging point falling in front of the retina, thus creating myopic peripheral retinal defocus and achieving the effect of preventing and controlling the progression of myopia. Alternatively, a target refractive topographic map SE′ combined with a negative lens can be used to achieve central refractive correction, with the peripheral retinal imaging point falling behind the retina, thus creating hyperopic peripheral retinal defocus and achieving the purpose of promoting eyeball growth.

[0089] In some embodiments, the design device 103 is used to perform basic correction based on the target refractive topography map and to perform defocus increment on the peripheral correction area of ​​the target individual's eyeball, thereby deriving a refractive power distribution correction scheme for the peripheral correction area of ​​the target individual's eyeball. Lenses that use the target refractive topography map SE′ for peripheral basic correction and optionally perform peripheral defocus increment design are suitable for eyeglasses, contact lenses (rigid and soft lenses), intraocular implants, etc. This corrective lens design device can be used to configure lenses for certain professionals such as pilots and athletes. These professionals, such as pilots and athletes, have high requirements for eccentric and peripheral visual acuity during their work; poor peripheral visual acuity and visual quality will significantly affect their operation and performance.

[0090] For reference Figure 6 , Figure 6 A flowchart illustrating a corrective lens design device according to an embodiment mainly includes the following steps:

[0091] S31: Obtain the central refractive power of the target individual's eye. This allows measurement of the refractive power of the target individual's eye at different points within a preset field of view on the retina, including the central refractive power.

[0092] S32: Based on the central refractive power, find the target refractive power topographic map corresponding to the central refractive power from the refractive power topographic map group.

[0093] S33: Delineate the central and peripheral correction zones on the retina of the target individual's eyeball.

[0094] S34: Designed to incorporate defocusing into the peripheral retina of the target individual's eyeball.

[0095] S35: Based on the target refractive topography map and the added peripheral defocus, obtain a semi-personalized retinal refractive power distribution correction scheme for the target individual.

[0096] The corrective lens design device in this embodiment classifies the peripheral refractive power distribution data of the retina according to the central refractive power, and uses the classified refractive power distribution surfaces as the basis for compensation to perform personalized peripheral refractive correction, designing personalized defocus lenses, thereby further improving the visual quality of the population and enhancing the function and effect of special defocus lenses.

[0097] Since the refractive power and defocus of the naked eye retina are not regularly distributed, directly using the refractive power or defocus distribution of the naked eye retina as the basis for personalized correction will firstly lead to a large amount of irregular astigmatism, which will seriously affect visual quality. Secondly, fully personalized defocus lenses greatly increase costs and requirements from clinical testing to lens processing and production, and the cycle is long, which cannot meet the needs of a large number of people. Thirdly, fully personalized lens design and production costs are high and the cost-effectiveness is low. Therefore, semi-personalized peripheral defocus distribution design lenses can not only reduce costs, but also allow most people in need to enjoy the benefits of these lenses.

[0098] To illustrate the feasibility of this solution, the inventors validated existing data, specifically refractive topographic maps within a 16° range. These maps were divided into four annular regions in 4° increments: CAR1 represents the 0-4° circular region, CAR2 the 4-8° annular region, CAR3 the 8-12° annular region, and CAR4 the 12-16° annular region. First, the average relative defocus of the corresponding regions in the six groups (G1-G6) was calculated. Then, it was verified that the regional defocus value for each individual was within ±0.5D of the average defocus value of their corresponding group, as a difference exceeding 0.5D could cause visual discomfort. By examining the peripheral refractive errors of a cumulative total of 947 individuals, the results showed that the refractive topographic maps within the 16° range (within the range (±0.5D) that do not cause refractive symptoms) could cover approximately 80% of the population.

[0099] Table 1 below shows the proportion of children who meet the grouping type after classifying retinal refractive topography by central refractive power - including 468 individuals.

[0100] Table 1

[0101]

[0102] Table 2 below shows the proportion of individuals who meet the grouping criteria after classifying retinal refractive topography by central refractive power - adults (including 479 individuals in total).

[0103] Table 2

[0104]

[0105] In Tables 1 and 2, N represents the number of individuals included in the corresponding group.

[0106] This embodiment also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, performs the following process:

[0107] Obtain the central refractive power of the target individual's eyeball;

[0108] Based on the central refractive power, a target refractive power topographic map corresponding to the central refractive power is found from the refractive power topographic map group. The central refractive power is within the range of the central refractive power corresponding to the target refractive power topographic map. Any refractive power topographic map in the refractive power topographic map group describes the retinal refractive power distribution of an eyeball with a corresponding central refractive power within a preset field of view. The refractive power topographic map is obtained by statistically processing the retinal refractive power data of multiple individual eyes with corresponding central refractive powers within the preset field of view.

[0109] By combining the target refractive topography map, a refractive power distribution correction scheme for the target individual's eyeball is derived, so as to obtain a corrective lens for the target individual.

[0110] When the computer program stored in the computer-readable storage medium of this embodiment is executed, it can achieve the goal of designing semi-personalized lenses for individuals by taking into account the peripheral defocus characteristics of the human retina, thereby improving vision and visual quality.

[0111] This embodiment also provides a lens, which is designed using the corrective lens design device described in any of the above embodiments.

[0112] The lens in this embodiment is a semi-personalized lens designed taking into account the peripheral defocus characteristics of the human retina, which can improve vision and visual quality.

[0113] The above provides a detailed description of the corrective lens design device, storage medium, and lens provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A corrective lens design device, characterized in that, include: Acquisition device, used to acquire the central refractive power of the target individual's eyeball; A selection device is used to find a target refractive topographic map corresponding to the central refractive power from a set of refractive topographic maps, based on the central refractive power. The central refractive power is within the range of the central refractive power corresponding to the target refractive topographic map. Any refractive topographic map in the set of refractive topographic maps describes the retinal refractive power distribution of an eyeball with a corresponding central refractive power within a preset field of view. The refractive topographic map is obtained by statistically processing the retinal refractive power data of multiple individual eyes with corresponding central refractive powers within the preset field of view. Design device for combining the target refractive topography map to derive a refractive power distribution correction scheme for the target individual's eyeball, so as to obtain corrective lenses for the target individual.

2. The corrective lens design device according to claim 1, characterized in that, It also includes a construction device for constructing the set of refractive topographic maps, the construction device being used for: For each individual in the preset population, the refractive power of the individual's eyeball at different points within the preset field of view of the retina is measured to obtain the refractive power data of the individual's eyeball at different points within the preset field of view of the retina; The preset population is divided into m groups. The central refractive power of the eyeballs of individuals belonging to the same group is within the range of the central refractive power of the corresponding group, where m is a positive integer greater than or equal to 2. For each group of m individuals, the average refractive error data of the same location on the eyeball of each individual in the group is calculated to obtain the averaged refractive error distribution data of the group. For each group of m individuals, the averaged refractive error distribution data of this group is subjected to rotational symmetry fitting, and the refractive error topography map of this group is obtained based on the fitted refractive error distribution data.

3. The corrective lens design device according to claim 1, characterized in that, It also includes a construction device for constructing the set of refractive topographic maps, the construction device being used for: For each individual in the preset population, the refractive power of the individual's eyeball at different points within the preset field of view of the retina is measured to obtain the refractive power data of the individual's eyeball at different points within the preset field of view of the retina; The preset population is divided into m groups. The central refractive power of the eyeballs of individuals belonging to the same group is within the range of the central refractive power of the corresponding group, where m is a positive integer greater than or equal to 2. For each group of m individuals, the average refractive error data of the same location on the eyeball of each individual in the group is calculated to obtain the averaged refractive error distribution data of the group. For each of the m groups of individuals, the retina of the individual's eyeball is divided into multiple regions according to the eccentricity. For each of the multiple regions, the average of the data of each point belonging to the region in the averaged refractive power distribution data of the group is calculated to obtain the refractive power topography map of the group.

4. The corrective lens design device according to claim 3, characterized in that, The retina of an individual's eye is divided into multiple regions based on eccentricity, including: Based on the eccentricity, the retina of an individual's eyeball is divided into multiple regions with a preset eccentricity step size.

5. The corrective lens design device according to claim 1, characterized in that, It also includes a construction device for constructing the set of refractive topographic maps, the construction device being used for: For each individual in the preset population, the refractive power of the individual's eyeball at different points within the preset field of view of the retina is measured to obtain the refractive power data of each point of the individual's eyeball on the retina within the preset field of view. For each individual in the preset population, the relative defocus data of the individual's eyeball at each point of the retina within the preset field of view is obtained based on the refractive power data of that individual's eyeball at each point of the retina within the preset field of view. The preset population is divided into m groups. The central refractive power of the eyeballs of individuals belonging to the same group is within the range of the central refractive power of the corresponding group, where m is a positive integer greater than or equal to 2. For each group of m individuals, the average relative defocus data of the same location on the eyeball of each individual in the group is calculated to obtain the averaged relative defocus distribution data of the group. For each group of m individuals, the averaged relative defocus distribution data of this group is subjected to rotational symmetry fitting, and the refractive topographic map of this group is obtained based on the fitted relative defocus distribution data.

6. The corrective lens design device according to claim 1, characterized in that, The design device is used to combine the target refractive topography map to derive a refractive power distribution correction scheme for the target individual's eyeball, so as to obtain corrective lenses for the target individual, including: The design device is used to delineate the central correction zone and the peripheral correction zone of the retina of the target individual's eyeball, and combine the target refractive topography map to obtain a refractive power distribution correction scheme for the central correction zone and / or the peripheral correction zone of the target individual's eyeball, so as to obtain a corrective lens for the target individual's eyeball.

7. The corrective lens design device according to claim 1, characterized in that, The design device is used to combine the target refractive topography map to derive a refractive power distribution correction scheme for the target individual's eyeball, so as to obtain corrective lenses for the target individual, including: The design device is used to combine the target refractive topography map and positive / negative lenses to derive a refractive power distribution correction scheme for the central correction zone of the target individual's eyeball.

8. The corrective lens design device according to claim 1, characterized in that, The design device is used to combine the target refractive topography map to derive a refractive power distribution correction scheme for the target individual's eyeball, so as to obtain corrective lenses for the target individual, including: The design device is used to perform basic correction based on the target refractive topography map and to perform defocus increment on the peripheral correction area of ​​the target individual's eyeball, thereby obtaining a refractive power distribution correction scheme for the peripheral correction area of ​​the target individual's eyeball.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, performs the following process: Obtain the central refractive power of the target individual's eyeball; Based on the central refractive power, a target refractive power topographic map corresponding to the central refractive power is found from the refractive power topographic map group. The central refractive power is within the range of the central refractive power corresponding to the target refractive power topographic map. Any refractive power topographic map in the refractive power topographic map group describes the retinal refractive power distribution of an eyeball with a corresponding central refractive power within a preset field of view. The refractive power topographic map is obtained by statistically processing the retinal refractive power data of multiple individual eyes with corresponding central refractive powers within the preset field of view. By combining the target refractive topography map, a refractive power distribution correction scheme for the target individual's eyeball is derived to obtain corrective lenses for the target individual.

10. A lens, characterized in that, The corrective lens design device as described in any one of claims 1 to 8 is used.

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