A design method for a biconcave aspherical implantable ophthalmic optical element with a large field of view

Abstract

A design method for a biconcave aspherical implantable optoelectronic element with a large field of view. This method relates to the field of optoelectronic technology, specifically to a design method for a biconcave aspherical implantable optoelectronic element with a large field of view. The method designs both the front and rear surfaces of the implantable optoelectronic element as concave structures, which not only expands the field of view of the incident light but also balances system spherical aberration and improves visual acuity. The method includes the following steps: designing the structure of the biconcave aspherical implantable optoelectronic element; setting the axial relationship of the front surface of the biconcave aspherical implantable optoelectronic element; setting the axial relationship of the rear surface of the biconcave aspherical implantable optoelectronic element to match the axial relationship of the front surface; constructing a first-order linear model between the axial relationship and system spherical aberration to correct system spherical aberration; constructing a field-of-view expansion model for the biconcave aspherical implantable optoelectronic element to expand the field of view, thus completing the design of the biconcave aspherical implantable optoelectronic element with a large field of view.

Description

Technical Field

[0001] This invention relates to the field of optometry technology, specifically to a design method for a biconcave aspherical large field-of-view implantable optometry element. Background Technology

[0002] In the field of refractive surgery for myopia, implantable optical components (ICLs) are an important vision correction solution. With the increasing number of people with myopia and the ever-increasing demands of patients for vision correction, the need for technological innovation in ICLs is becoming more and more urgent.

[0003] However, existing traditional ICL technology has many insurmountable drawbacks. One prominent issue is its limited field of view. Normal human vision relies on a large field of view to naturally observe the surrounding environment, perform daily activities, and cope with various dynamic scenarios. However, the optical structure of traditional ICLs is typically based on a relatively conventional lens construction, which significantly restricts the propagation path of light as it enters the eye after refraction through the lens. This results in a relatively narrow field of view that patients can clearly observe after wearing traditional ICLs. In activities requiring a wide field of view, such as driving or sports, it is difficult to obtain comprehensive visual information, greatly impacting quality of life and the naturalness of the visual experience.

[0004] Meanwhile, the insufficient clarity of traditional ICL lenses is also a significant factor limiting their application effectiveness. From an optical perspective, the precision with which a lens focuses light directly determines the clarity of the image. The materials used in traditional ICL lenses often exhibit some degree of chromatic dispersion when light passes through, meaning that different wavelengths of light travel at different speeds and refraction angles within the optical element. This causes the light to fail to focus precisely on the retina, resulting in a blurry image. From an optical design perspective, the relatively simple shape and curvature of traditional ICL lenses make it difficult to precisely adapt to the complex eye structures of different individuals, leading to significant deviations in the angle of light incidence and preventing precise focusing on the retina. Even when using COLLAMER material, the precision limitations of traditional manufacturing processes cannot be ignored. Minor imperfections on the surface of the optical element and processing errors such as thickness uniformity deviations can interfere with the light propagation path, causing abnormal scattering or refraction of light within the optical element. The combination of these abnormal factors causes patients to experience blurred vision and dull edges even under normal lighting conditions after wearing traditional ICLs. They often struggle with tasks that require high visual precision, such as reading small text or recognizing subtle facial expressions, which severely impacts their daily visual experience. Summary of the Invention

[0005] To address the issues of limited field of view and insufficient clarity in existing implantable optometry elements, the present invention aims to propose a design method for a biconcave aspherical implantable optometry element with a large field of view. This method designs both the front and rear surfaces of the implantable optometry element as concave structures, which not only expands the field of view of incident light but also balances system spherical aberration, thereby improving visual clarity.

[0006] The method includes the following steps:

[0007] S1. Design of a biconcave aspherical implantable ophthalmic optical element structure:

[0008] S11. The axial relationship of the anterior surface of the biconcave aspherical implantable ophthalmic optical element is defined as follows: ,in, Indicates the front surface axis position. This represents the reciprocal of the radius of curvature of the front surface. This represents the conicity coefficient of the front surface. This represents the radial distance from the point of incidence of light on the anterior surface of the implantable biconcave aspherical ophthalmic optics element, relative to the optical axis. Represents the aspherical polynomial of the front surface. express The aspheric coefficient of the term, Indicates the first Rank , express The highest order used during the unfolding, and All are even numbers;

[0009] S12. Set the rear surface axis of the biconcave aspherical implantable ophthalmic optical element to match the front surface axis.

[0010] S2. Define the ratio of the radii of curvature of the anterior and posterior surfaces of a biconcave aspherical implantable ophthalmic optical element. and thickness adjustment coefficient ;

[0011] S3, Construction , The first-order linear model between the system spherical aberration and the system spherical aberration is adjusted by... and Correcting the spherical aberration of the system, we obtain and System spherical aberration correction value;

[0012] S4. Based on the results of step S3, construct a field-of-view expansion model for a biconcave aspherical implantable ophthalmic optical element by combining the field-of-view parameters, and adjust... and The system spherical aberration correction value is obtained by expanding the field of view. and Precise values ​​enable the design of implantable biconcave aspherical large field-of-view optometry components.

[0013] Furthermore, the relationship between the posterior surface axis of the biconcave aspherical implantable ophthalmic optical element is as follows: ,in, Indicates the rear surface axis position. This represents the reciprocal of the radius of curvature of the back surface. This represents the conicity of the rear surface. This represents the radial distance from the point of incidence of light on the optical axis of the rear surface of the biconcave aspherical implantable ophthalmic optics element. Represents the aspherical polynomial on the back surface. express The aspheric coefficient of the term, Indicates the first Rank , express The highest order used during the expansion.

[0014] Furthermore, the aforementioned The formula for calculation is: , Indicates the radius of curvature of the front surface. This represents the radius of curvature of the back surface.

[0015] Furthermore, the aforementioned The formula for calculation is: , This indicates the thickness of a biconcave aspherical implantable ophthalmic optical element.

[0016] Furthermore, the aforementioned , The first-order linear model between the system spherical aberration and the system spherical aberration is: ,in, Indicates the spherical difference of the system. Indicates the reference ball difference value. express Reference value, and Representing the system spherical aberration pairs respectively and Sensitivity.

[0017] Furthermore, the field of view parameters shown include: the angle of incidence of light rays incident on the front surface. The angle of refraction of light incident on a biconcave aspherical implantable ophthalmic optical element The height at which light strikes the front surface The height difference of light incident on the front and back surfaces and the angle of inclination of light after passing through the front surface .

[0018] Furthermore, the aforementioned ,in, Describes the derivative function. Indicates when When small changes occur The corresponding change.

[0019] Furthermore, the field-of-view extension model of the biconcave aspherical implantable ophthalmic optical element is as follows: ,in, The field of view is the angle at which light rays strike the lens. Indicates the refractive index of the aqueous humor and vitreous humor. This represents the refractive index of a biconcave aspherical implantable ophthalmic optical element.

[0020] The beneficial effects of the method described in the invention are as follows:

[0021] (1) Expanding the field of view and enhancing visual experience: The design method described in this invention designs the implantable ophthalmic optical element as a biconcave aspherical structure, which expands the field of view of incident light. After wearing it, patients can obtain more comprehensive visual information when engaging in activities that require a wide field of view, such as driving and sports. The field of view is no longer limited to a narrow area, and the naturalness of the visual experience is significantly improved. Just like the human eye normally observes the surrounding environment, it can naturally perceive and respond to various dynamic scenes.

[0022] (2) Effective aberration correction and improved imaging clarity: The design method described in this invention establishes a relationship model between the ratio of the front and rear surface curvature radii, the thickness adjustment coefficient, and the system spherical aberration, and corrects the system spherical aberration based on this model. Simultaneously, it optimizes the biconcave aspherical structure, effectively balancing the system spherical aberration. This allows light from different apertures to be focused more concentrated on the retina, reducing light scattering and refraction deviations, and significantly improving imaging clarity. Under normal lighting conditions, patients experience clearer and sharper vision, making it easier to perform fine visual tasks such as reading small print and recognizing facial details, resulting in a greatly improved daily visual experience.

[0023] (3) Personalized Adaptation: The design method described in this invention can be tailored to individual eye characteristics. By accurately measuring eye parameters, adjustments are made based on system spherical aberration data and field of view requirements. and The design method described in this invention achieves spherical aberration correction and field of view expansion, breaking through the limitations of traditional ICLs, improving vision correction effects, and giving patients a better visual experience. Attached Figure Description

[0024] Figure 1This is a flowchart of the method described in this invention;

[0025] Figure 2 This is a diagram of the LB human eye model light structure described in this invention;

[0026] Figure 3 This is a top view of the biconcave aspherical implantable ophthalmic optical element described in this invention;

[0027] Figure 4 This is a side view of the biconcave aspherical implantable ophthalmic optical element described in this invention;

[0028] Figure 5 This is a diagram showing the light structure of the biconcave aspherical implantable ophthalmic optical element of the present invention combined with the LB human eye model;

[0029] Figure 6 This is a schematic diagram showing the implantation position of the biconcave aspheric implantable ophthalmic optical element of the present invention in the human eye;

[0030] Figure 7 This is a comparison table of design parameters for existing designs (convex-concave and flat-concave) and the design method (bi-concave) of this invention when the myopia is -2D (200 degrees).

[0031] Figure 8 The MTF curve corresponding to the plano-concave design when the myopia is -2D as described in this invention;

[0032] Figure 9 The MTF curve corresponding to the convex-concave design when the myopia is -2D as described in this invention;

[0033] Figure 10 The MTF curve corresponding to the design method (biconcave design) of this invention when the myopia condition is -2D.

[0034] Figure 11 This is a comparison table of design parameters for existing designs (convex-concave and flat-concave) and the design method (bi-concave) of this invention when the myopia is -5D (500 degrees).

[0035] Figure 12 The MTF curve corresponding to the plano-concave design when the myopia is -5D as described in this invention;

[0036] Figure 13 The MTF curve corresponding to the convex-concave design when the myopia is -5D as described in this invention;

[0037] Figure 14 The MTF curve corresponding to the design method (biconcave design) of this invention when the myopia is -5D. Detailed Implementation

[0038] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1

[0040] This embodiment provides a design method for a biconcave aspherical large field-of-view implantable ophthalmic optical element, such as... Figure 1 As shown, the method includes the following steps:

[0041] Traditional implantable optical elements are spherical or aspherical designs, which have limitations in terms of field of view and spherical aberration control. This invention, based on the complex optical structure of the human eye and the principles of light propagation, designs the implantable optical element (ICL) as a biconcave aspherical optical element structure:

[0042] In the basic structural design stage of the biconcave aspherical ophthalmic optical element, this invention firstly is based on the following... Figure 2 The total power of the ICL was determined based on the LB (Liou-Brennan) human eye model and postoperative refractive requirements, and was purely distributed on the anterior and posterior concave spherical surfaces to achieve initial cancellation of central and peripheral spherical aberration. Subsequently, a suitable central thickness was selected, and the basic structure of the biconcave aspherical optoelectronic element was constructed with controllable spherical curvature. Simultaneously, all aspherical polynomial coefficients were set to zero, retaining only the pure spherical shape. Finally, the biconcave aspherical optoelectronic element model was subjected to parallel light and... arrive Off-axis ray tracing was performed to verify whether the system's spherical aberration and field of view response met the preliminary design requirements.

[0043] Based on the complex optical structure and light propagation principle of the human eye, this invention employs a biconcave aspherical design. According to the LB human eye model, it simulates the light propagation path and sets the axial relationship of the anterior surface (the surface closest to the iris) of the biconcave aspherical implantable ophthalmic optical element as follows: ,in, Indicates the front surface axis position. This represents the reciprocal of the radius of curvature of the front surface. This represents the conicity coefficient of the front surface. This represents the radial distance from the point of incidence of the light ray on the biconcave aspherical ophthalmic optics element to the optical axis of the anterior surface. This represents an aspherical polynomial used to correct higher-order front surface aberrations (using a series of power terms to fine-tune higher-order aberrations). express The aspheric coefficient of the term, Indicates the first Rank , express The highest order used during the unfolding, and All are even numbers. By optimizing these parameters, the refraction of light rays from different fields of view is balanced, reducing system spherical aberration.

[0044] This invention adjusts the aspherical coefficient to allow the front surface to guide light into the eye more evenly, thereby expanding the field of view.

[0045] For the posterior surface, a unique aspherical structure is designed based on the optical principles of the eye and the requirements for light focusing. The axis of the posterior surface matches that of the anterior surface, working in conjunction with the anterior surface to further optimize light propagation. By optimizing the aspherical parameters, the posterior surface reduces light scattering and refraction deviations within the eye, improves image sharpness, effectively mitigates system spherical aberration, and ensures that light is accurately focused on the retina.

[0046] The axial relationship of the posterior surface of a biconcave aspherical implantable ophthalmic optical element is as follows: ,in, Indicates the rear surface axis position. It represents the reciprocal of the radius of curvature of the back surface. This represents the conicity coefficient of the rear surface. This represents the radial distance from the point of incidence of light on the rear surface optical axis of the biconcave aspherical implantable ophthalmic optics element. Represents the aspherical polynomial on the back surface. express The aspheric coefficient of the term, Indicates the first Rank , express The highest order used during the expansion.

[0047] The biconcave aspherical implantable ophthalmic optical element designed according to the method of this invention is biconcave in shape, and its top and bottom view structural diagrams are as follows. Figure 3 and 4 As shown.

[0048] Further adjustments were made to the optical performance of the biconcave aspherical implantable ophthalmic optical element. For example... Figure 5 As shown in the figure, the refraction of light between structures such as the cornea, the biconcave aspheric implantable ophthalmic optical element, and the lens reveals differences in light focusing characteristics across different fields of view. Based on this, the aspheric coefficient of the anterior surface is optimized more precisely. Figure 5Using the data on the incident angle and refraction angle of the light as a reference, when the incident angle of the light is large in the edge region of a large field of view, the conicity coefficient of a specific region on the front surface should be appropriately increased. This changes the direction of light refraction, allowing it to enter the eye more evenly and expanding the field of view.

[0049] according to Figure 5 Based on the light structure data, targeted adjustments are made to the aspherical structure of the rear surface. For example, if the light focusing deviation is large in a certain area, the higher-order aspherical coefficient of the rear surface in that area can be adjusted. This optimizes the light propagation path within the eye, reduces scattering and refraction deviations, and improves image clarity. Simultaneously, it references... Figure 6 The present invention is based on the actual position diagram of the human eye, taking into account the relative positional relationship between the lens and the surrounding eye tissues, to ensure that the biconcave design of the lens will not have an adverse effect on tissues such as the cornea and iris, and can stably perform optical correction function inside the eye.

[0050] After completing the above-mentioned biconcave structure design, in order to further improve the optical performance of the biconcave aspherical implantable ophthalmic optical element, this invention also focuses on optimizing the design of the key parameters of the surface of the biconcave optical element, namely the relationship between the height of the front surface and the radius of curvature. At the same time, it combines other innovative methods to achieve the dual goals of system spherical aberration correction and field of view expansion.

[0051] (1) System spherical aberration correction

[0052] System spherical aberration correction based on the ratio of anterior surface height to radius of curvature (spherical aberration of the entire human eye model after implantation of a biconcave aspheric implantable optometry element into the LB human eye model, including corneal spherical aberration and lens spherical aberration): Defines the ratio of the radii of curvature of the anterior and posterior surfaces. , , and Represent the radii of curvature of the front and rear surfaces respectively; define the thickness adjustment coefficient. , , This indicates the thickness (anterior surface height) of the biconcave aspherical implantable ophthalmic optical element. It is assumed here that the thickness of the lens is uniform at all points. If it is not uniform in reality, it can be handled by means of average thickness, etc.

[0053] Based on extensive optical simulations and experimental data, a system was constructed. , The first-order linear model between the system's spherical aberration and the system's spherical aberration: ,in, Indicates the spherical difference of the system. Indicates the reference ball difference value. express Reference value, and Representing the spherical difference pairs and Sensitivity;

[0054] By adjusting and Correcting the spherical aberration of the system, we obtain and System spherical aberration correction value: Based on the system spherical aberration measurement results, when the system spherical aberration is large, the value should be appropriately increased. The value (i.e., the ratio of the radius of curvature of the rear surface to the radius of curvature of the front surface) is increased, while fine-tuning is performed. (For example, by appropriately increasing the thickness, the path of light propagation within the lens can be changed, further optimizing the refraction effect.) This can change the refraction angle of light on the front and back surfaces of the lens, correct system spherical aberration, and make the light more focused.

[0055] (2) Field of view expansion

[0056] The ratio of the radii of curvature of the front and rear surfaces and the ratio of thickness to radius of curvature ( and This directly affects the refraction path of light, focusing effect, and field of view. Different The value changes the angle at which light refracts on the front and back surfaces, thus adjusting the convergence or divergence of the light and affecting the focal point; while Changes in the value alter the optical path of light propagating inside the lens, thus affecting the focusing of light.

[0057] This invention is based on the system spherical aberration correction and Combined with field of view parameters (field of view parameters include: the angle of incidence of light rays onto the front surface) The angle of refraction of light incident on a biconcave aspherical implantable ophthalmic optical element The height at which light strikes the front surface The height difference of light incident on the front and back surfaces and the angle of inclination of light after passing through the front surface Constructing a field-of-view extension model for a biconcave aspherical implantable ophthalmic optical element: ,in, The field of view is the angle at which light rays strike the lens. Indicates the refractive index of the aqueous humor and vitreous humor. The refractive index represents the refractive index of a biconcave aspherical implantable ophthalmic optical element. , Denotes the derivative function, when When small changes occur The corresponding change is ,Right now express The invention, while ensuring the overall optical performance and biocompatibility of the biconcave aspherical implantable ophthalmic optical element, adjusts the minute variables; and The system's spherical aberration correction value alters the light propagation path and refraction angle within the lens, thereby expanding the field of view. and Precise values ​​enable the design of implantable biconcave aspherical large field-of-view optometry components.

[0058] Specifically, the method described in this invention can accurately calculate and adjust according to the ocular parameters and visual field requirements of different patients. and This allows for personalized adaptation, providing patients with a different visual experience. For example, for patients with a larger field of vision, the size can be appropriately increased. Values ​​(such as those from the initial design) Adjust to ), while fine-tuning Value (such as from) Adjust to That is, appropriately increase and This adjustment alters the refraction of light in both the horizontal and vertical directions, guiding it to enter the eye at a more optimal angle, thereby expanding the field of view in both directions. The posterior and anterior surfaces work together to ensure that while the field of view is expanded, the light remains accurately focused on the retina, guaranteeing image clarity.

[0059] Example 2: This example is a further limitation of Example 1.

[0060] In this example, we assume the individual's myopia is -2D, and let the radius of curvature of the anterior surface of the biconcave aspherical implantable optometry element be... , radius of curvature of the back surface The refractive index is At this time, the system's field of view angle It is 4°. ; to adjust lens thickness Adjust to ,but .

[0061] A biconcave aspheric implantable ophthalmic optical element was implanted in front of a LB human eye model with -2D myopia. The system spherical aberration of the myopic eye was measured to be 0.0486. Regarding field of view extension, based on the -2D myopic eye parameters, this embodiment sets the field of view to... , , , and Five field of view. The radii of curvature of the front and rear surfaces. and Adjusted to and The ratio of the radii of curvature of the front and back surfaces is... , Then the thickness adjustment coefficient By changing and The refraction path of light within the lens is optimized, allowing light from different apertures to be more concentrated on the retina, reducing system spherical aberration to 0.0004. Simultaneously, this adjustment alters the refraction angles of light in the horizontal and vertical directions, guiding light into the eye at a wider angle and effectively expanding the horizontal and vertical field of view. The rear and front surfaces work together to ensure that while expanding the field of view, light remains precisely focused on the retina, maintaining image sharpness.

[0062] In summary, for the nearsighted -2D human eye, the design parameters of the biconcave aspheric implantable ophthalmic optical element of this invention, compared with those of plano-concave and convex-concave ophthalmic optical elements, are as follows: Figure 7 As shown. A comparison of specific parameters between existing designs (convex-recessed and flat-recessed) and the design method described in this invention for the same nearsighted -2D human eye. Compared to the two existing designs, this invention can significantly reduce system spherical aberration while expanding the field of view, allowing more light energy to enter the human eye and improving clarity.

[0063] Image quality analysis: Those skilled in the art typically use the modulation transfer function (MTF) to evaluate the image quality of the human eye, generally using a spatial frequency of... The performance of the ICL is evaluated by comparison. Since the method described in this invention designs a large field-of-view ICL, this embodiment uses the maximum field of view. exist The MTF values ​​at a certain point were compared to those of the three designs. For the convex-concave design, the MTF value was 0.2581, for the plano-concave design it was 0.343, and for the present invention it was 0.4386. The results show that the present invention exhibits better optical performance over the other two designs in a wide field of view.

[0064] When the myopia is -2D (200 degrees), the MTF curves corresponding to the plano-concave design, the convex-concave design, and the design method (biconcave design) described in this invention are as follows: Figure 8 , 9 As shown in Figure 10.

[0065] Example 3: This example is a further limitation of Example 1.

[0066] In this example, we assume the individual's myopia is -5D, and let the refractive index of the biconcave aspherical implantable optoelectronic element be... Front surface radius of curvature Compared to the anterior surface curvature radius of -2D aspheric implantable ophthalmic optical elements for myopia correction, -5D myopia lenses require stronger light refraction capabilities. A smaller absolute value of the negative curvature radius can meet this requirement, allowing light to converge more quickly upon entering the eye. The posterior surface curvature radius is set to... At this point, the ratio of the radii of curvature of the front and rear surfaces , Then the thickness adjustment coefficient .

[0067] The systematic spherical aberration of the eye in the myopia-5D model is: ,in accordance with , The first-order linear model between the system spherical aberration and the system spherical aberration requires adjustment to reduce the system spherical aberration. and This embodiment sets the field of view to... , , , and Five field of view. The radii of curvature of the front and rear surfaces. and Adjusted to and ,but ; Adjust to ,but By adjusting and This alters the refraction of light in different directions, guiding the light to refract properly and expanding the field of view. The rear and front surfaces work together to ensure clear imaging while expanding the field of view.

[0068] In summary, for the human eye with myopia up to 5D, the design parameters of the biconcave aspherical implantable ophthalmic optical element of this invention, compared with those of plano-concave and convex-concave ophthalmic optical elements, are as follows: Figure 11 As shown. A comparison of specific parameters between existing designs (convex-recessed and flat-recessed) and the design method described in this invention for the same nearsighted -5D eye. Compared to the two existing designs, this invention can significantly reduce system spherical aberration while expanding the field of view, allowing more light energy to enter the eye and improving clarity.

[0069] Similar to Example 2, this example uses MTF values ​​at a spatial frequency of 50 lp / mm to evaluate the performance of ophthalmic optical components for image quality analysis, still based on the maximum field of view. The MTF values ​​at a spatial frequency of 50 lp / mm were used to compare the three designs. For the convex-concave design, the MTF value at this time was 0.08303, for the plano-concave design it was 0.01625, and for the present invention it was 0.1643.

[0070] When the myopia is -5D (500 degrees), the MTF curves corresponding to the plano-concave design, the convex-concave design, and the design method (biconcave design) described in this invention are respectively as follows: Figure 12 , 13 As shown in Figure 14.

Claims

1. A design method for a biconcave aspherical large field-of-view implantable ophthalmic optical element, characterized in that, The method includes the following steps: S1. Design of a biconcave aspherical implantable ophthalmic optical element structure: S11. The axial relationship of the anterior surface of the biconcave aspherical implantable ophthalmic optical element is defined as follows: ,in, Indicates the front surface axis position. This represents the reciprocal of the radius of curvature of the front surface. This represents the conicity coefficient of the front surface. This represents the radial distance from the point of incidence of light on the anterior surface of the implantable biconcave aspherical ophthalmic optics element, relative to the optical axis. Represents the aspherical polynomial of the front surface. express The aspheric coefficient of the term, Indicates the first Rank , express The highest order used during the unfolding, and All are even numbers; S12. Set the rear surface axis of the biconcave aspherical implantable ophthalmic optical element to match the front surface axis. S2. Define the ratio of the radii of curvature of the anterior and posterior surfaces of a biconcave aspherical implantable ophthalmic optical element. and thickness adjustment coefficient ; The The formula for calculation is: , Indicates the radius of curvature of the front surface. Indicates the radius of curvature of the rear surface; S3, Construction , The first-order linear model between the system spherical aberration and the system spherical aberration is adjusted by... and Correcting the spherical aberration of the system, we obtain and System spherical aberration correction value; The , The first-order linear model between the system spherical aberration and the system spherical aberration is: ,in, Indicates the spherical difference of the system. Indicates the reference ball difference value. express Reference value, and Representing the system spherical aberration pairs respectively and Sensitivity; S4. Based on the results of step S3, construct a field-of-view expansion model for a biconcave aspherical implantable ophthalmic optical element by combining the field-of-view parameters, and adjust... and The system spherical aberration correction value is obtained by expanding the field of view. and Precise values ​​enable the design of implantable, large-field-of-view, biconcave aspherical optical components. The field of view parameters include: the angle of incidence of light rays hitting the front surface. The angle of refraction of light incident on a biconcave aspherical implantable ophthalmic optical element The height at which light strikes the front surface The height difference of light incident on the front and back surfaces and the angle of inclination of light after passing through the front surface ; The ,in, Describes the derivative function. Indicates when When small changes occur The corresponding change; The field-of-view extension model of the described biconcave aspherical implantable ophthalmic optical element: ,in, The field of view is the angle at which light rays strike the lens. Indicates the refractive index of the aqueous humor and vitreous humor. This represents the refractive index of a biconcave aspherical implantable ophthalmic optical element.

2. The design method for a biconcave aspherical large field-of-view implantable ophthalmic optical element according to claim 1, characterized in that, The relationship between the posterior surface axis of the biconcave aspherical implantable ophthalmic optical element is as follows: ,in, Indicates the rear surface axis position. It represents the reciprocal of the radius of curvature of the back surface. This represents the conicity coefficient of the rear surface. This represents the radial distance from the point of incidence of light on the optical axis of the rear surface of the biconcave aspherical implantable ophthalmic optics element. Represents the aspherical polynomial on the back surface. express The aspheric coefficient of the term, Indicates the first Rank , express The highest order used during the expansion.

3. The design method for a biconcave aspherical large field-of-view implantable ophthalmic optical element according to claim 1, characterized in that, The The formula for calculation is: , This indicates the thickness of a biconcave aspherical implantable ophthalmic optical element.

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