Orthokeratology lens
By dividing the inner surface of the corneal resizing mirror into multiple functional areas and achieving a smooth transition at the connection, the problem of non-smooth arc transition in the prior art is solved, improving wear comfort and reducing corneal damage.
Patent Information
- Application Number
- CN202420320961.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-21
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-02-21
AI Technical Summary
The longitudinal section of the internal surface of the existing corneal resizing lens is composed of multiple arcs, which makes it difficult to smoothly transition between the arcs, resulting in discomfort and corneal damage when worn.
The inner surface of the corneal resizing mirror is divided into multiple functional areas from the center of the lens to the edge of the lens. Each functional area is continuously distributed in sequence, and a smooth transition is achieved at the connection of adjacent functional areas. By setting up an optical area and an inverted arc area , position the arc area and the surrounding arc area to ensure that the first and second order derivatives of the polynomial function at the connection are equal, and reduce the difference in vector height.
The overall smoothness of the inner surface of the corneal resizing lens is achieved, which reduces the discomfort when wearing it and reduces the damage to the cornea.
Smart Images
Figure CN222167353U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of glasses manufacturing, in particular to a corneal reshaping lens. Background Art
[0002] The longitudinal section of the inner surface of existing orthokeratology lenses (also known as OK lenses) is usually composed of multiple arcs, and the centers of the arcs are generally located on the symmetry axis of the lens. Therefore, it is difficult to smoothly transition between the arcs, causing discomfort to patients when wearing them. Utility Model Content
[0003] The utility model provides a corneal reshaping lens to achieve overall smoothness of the inner surface of the corneal reshaping lens, alleviate the discomfort felt by patients when wearing the lens, and reduce damage to the wearer's cornea.
[0004] The utility model provides a corneal reshaping lens, which comprises:
[0005] The inner surface of the orthokeratology lens is divided into a plurality of functional areas from the center of the lens to the edge of the lens, and the functional areas are sequentially and continuously distributed around, wherein the inner surface is the concave surface of the orthokeratology lens close to the cornea of the wearer;
[0006] Two adjacent functional areas of the inner surface have a smooth transition at the area connection.
[0007] Optionally, the functional area and the adjacent functional area have the same vector height at the area connection;
[0008] The first-order derivatives of the polynomial function of the functional area and the polynomial function of the adjacent functional area at the area connection are equal;
[0009] The second-order derivatives of the polynomial function of the functional area and the polynomial function of the adjacent functional area at the area connection are equal.
[0010] Optionally, the functional area includes an optical area, a reversal arc area, a positioning arc area and a peripheral arc area;
[0011] The optical zone is located in the central area of the inner surface, the optical zone center of the optical zone is the central position of the inner surface, and the optical zone end of the optical zone is the connection end where the optical zone is connected to the reverse arc zone;
[0012] The reversal arc zone is distributed around the optical zone, the reversal arc zone start end of the reversal arc zone is the connection end between the reversal arc zone and the optical zone, and the reversal arc zone end of the reversal arc zone is the connection end between the reversal arc zone and the positioning arc zone;
[0013] The positioning arc zone is distributed around the reversal arc zone, the positioning arc zone start end of the positioning arc zone is the connection end between the positioning arc zone and the reversal arc zone, and the positioning arc zone end of the positioning arc zone is the connection end between the positioning arc zone and the peripheral arc zone;
[0014] The peripheral arc zone is distributed around the positioning arc zone, the peripheral arc zone start end is the connection end where the peripheral arc zone and the positioning arc zone are connected, and the peripheral arc zone end is the outer end of the inner surface.
[0015] Optionally, the tear layer value at the center of the optical zone is equal to the first preset tear layer value;
[0016] The tear layer value at the end of the optical zone at the end of the optical zone is equal to the second preset tear layer value, wherein the second preset tear layer value is greater than the first preset tear layer value;
[0017] The first derivative of the optical zone polynomial function of the optical zone at the center of the optical zone is equal to zero.
[0018] Optionally, the optical zone tear layer value in the optical zone is greater than or equal to the first preset tear layer value and less than or equal to the second preset tear layer value.
[0019] Optionally, the tear layer value at the beginning of the inversion arc zone is equal to the second preset tear layer value;
[0020] The first-order derivative of the inversion arc zone polynomial function of the inversion arc zone at the beginning of the inversion arc zone is equal to the first-order derivative of the optical zone polynomial function of the optical zone at the end of the optical zone;
[0021] The second derivative of the inversion arc polynomial function at the beginning of the inversion arc is equal to the second derivative of the optical zone polynomial function at the end of the optical zone.
[0022] Optionally, the tear layer value at the beginning of the positioning arc zone is equal to the tear layer value at the end of the inversion arc zone at the end of the inversion arc zone;
[0023] The first-order derivative of the positioning arc polynomial function of the positioning arc at the beginning of the positioning arc is equal to the first-order derivative of the reversal arc polynomial function of the reversal arc at the end of the reversal arc;
[0024] The second-order derivative of the positioning arc polynomial function at the beginning of the positioning arc is equal to the second-order derivative of the reversal arc polynomial function at the end of the reversal arc;
[0025] The tear layer value at the end of the positioning arc area is equal to zero.
[0026] Optionally, the value of the tear layer at the beginning of the peripheral arc zone is equal to zero;
[0027] The first-order derivative of the peripheral arc zone polynomial function of the peripheral arc zone at the beginning of the peripheral arc zone is equal to the first-order derivative of the positioning arc zone polynomial function of the positioning arc zone at the end of the positioning arc zone;
[0028] The second-order derivative of the peripheral arc polynomial function at the beginning of the peripheral arc is equal to the second-order derivative of the positioning arc polynomial function at the end of the positioning arc.
[0029] Optionally, the first-order derivative of the positioning arc polynomial function at the end of the positioning arc is equal to the first-order derivative of the corneal function at the end of the positioning arc, wherein the corneal function is a function conforming to the cornea of the wearer;
[0030] The second-order derivative of the positioning arc zone polynomial function at the end of the positioning arc zone is equal to the second-order derivative of the corneal function at the end of the positioning arc zone.
[0031] Optionally, the tear layer value at the end of the peripheral arc zone is equal to a third preset tear layer value, wherein the third preset tear layer value is greater than the second preset tear layer value.
[0032] The technical solution of the embodiment of the utility model provides a corneal reshaping lens, the inner surface of which is divided into multiple functional areas from the center of the lens to the edge of the lens, and the functional areas are distributed in sequence and continuously, wherein the inner surface is the concave surface of the corneal reshaping lens close to the wearer's cornea; two adjacent functional areas on the inner surface have a smooth transition at the connection point of the areas, and the inner surface of the corneal reshaping lens of the embodiment of the utility model is smooth as a whole, which reduces the discomfort of the patient when wearing it and reduces the damage to the wearer's cornea.
[0033] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0035] Figure 1It is a structural schematic diagram of a corneal reshaping lens provided according to an embodiment of the utility model;
[0036] Figure 2 It is a plan view of the inner surface of a corneal reshaping lens provided according to an embodiment of the utility model;
[0037] Figure 3 It is a schematic diagram of the tear morphology behind the lens of a corneal reshaping lens provided according to an embodiment of the utility model. DETAILED DESCRIPTION
[0038] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0039] It should be noted that the terms "first", "second", "beginning", "end", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0040] Example
[0041] Figure 1 A schematic diagram of the structure of a corneal reshaping lens is provided for an embodiment of the utility model. Figure 2 1 is a plan view of the inner surface of a corneal reshaping lens provided according to an embodiment of the utility model. Figure 1 and Figure 2 As shown, the inner surface of the orthokeratology lens 10 is divided into multiple functional areas from the center to the edge of the lens, and the functional areas are distributed in sequence and continuously, wherein the inner surface is the concave surface of the orthokeratology lens close to the wearer's cornea; two adjacent functional areas on the inner surface have a smooth transition at the connection point of the areas.
[0042] In this embodiment, the smooth transition between two adjacent functional areas on the inner surface of the orthokeratology lens 10 at the area connection can be reflected in the following aspects:
[0043] The functional area and the adjacent functional area have the same height at the junction of the areas;
[0044] The first-order derivatives of the polynomial function of a functional area and the polynomial function of an adjacent functional area are equal at the area connection;
[0045] The second-order derivatives of the polynomial function of a functional area are equal to those of the polynomial function of the adjacent functional areas at the junction of the areas.
[0046] Exemplarily, an n-order polynomial function can be used to describe the vector height of each functional area of the orthokeratology lens 10:
[0047]
[0048] Correspondingly, the first-order derivative of the polynomial function of the functional area can be expressed as:
[0049]
[0050] Correspondingly, the second-order derivative of the polynomial function of the functional area can be expressed as:
[0051]
[0052] The radius of curvature can reflect the degree of curvature of the function graph at a certain point. At point x on the inner surface of the orthokeratology lens 10, its radius of curvature R(x) can be expressed by the following formula:
[0053]
[0054] Substituting this into z′(x) and z″(x), we get:
[0055]
[0056] For two adjacent functional areas z1 and z2, which are connected at point x, in order to make a smooth transition at the connection, to make the wearer comfortable enough, and to enable the refractive state of the orthokeratology lens to change continuously, it can be required that:
[0057] The vector heights of the functional areas z1 and z2 at the junction of the areas are equal:
[0058] z1(x)=z2(x)
[0059] The first derivatives of x at the junction of the functional areas z1 and z2 are equal:
[0060] z1′(x0)=z2′(x0)
[0061] The second derivatives of the functional areas z1 and z2 with respect to x are equal at the junction of the areas:
[0062] z1″(x0)=z2″(x0)
[0063] Since the radius of curvature is a function of the first-order derivative and the second-order derivative, when the first-order derivative is equal to the second-order derivative, the radius of curvature is also equal, and the optical power of the orthokeratology lens is continuous.
[0064] In one embodiment, the functional zones may include an optical zone, a reverse arc zone, a positioning arc zone, and a peripheral arc zone.
[0065] The optical zone is located in the central area of the inner surface, the optical zone center of the optical zone is the central position of the inner surface, and the optical zone end of the optical zone is the connection end where the optical zone is connected to the reverse arc zone.
[0066] The inversion arc zone is distributed around the optical zone, the inversion arc zone start end is the connection end where the inversion arc zone is connected to the optical zone, and the inversion arc zone end is the connection end where the inversion arc zone is connected to the positioning arc zone.
[0067] The positioning arc zone is distributed around the reversal arc zone, the positioning arc zone start is the connection end where the positioning arc zone is connected to the reversal arc zone, and the positioning arc zone end is the connection end where the positioning arc zone is connected to the peripheral arc zone.
[0068] The peripheral arc zone is distributed around the positioning arc zone, the peripheral arc zone start is the connection end where the peripheral arc zone is connected to the positioning arc zone, and the peripheral arc zone end is the outer end of the inner surface.
[0069] like Figure 1 and Figure 2 As shown in the figure, BC represents the optical zone, RC represents the inversion arc zone, AC represents the positioning arc zone, and PC represents the peripheral arc zone. The optical zone, inversion arc zone, positioning arc zone, and peripheral arc zone are radially distributed from the center to the outside. Generally, since the cross-section of the orthokeratology lens is symmetrical on the left and right, Figure 1 The functional areas are only marked on the right side of the cross section of the orthokeratology lens.
[0070] The center of the optical zone is the center of the inner surface, and its position can be represented by x0. The connection between the optical zone and the inversion arc zone can be called the end of the optical zone and the beginning of the inversion arc zone, and its position can be represented by x BC The connection between the reversal arc and the positioning arc can be called the end of the reversal arc and the beginning of the positioning arc. Its position can be represented by x RC The connection between the positioning arc area and the peripheral arc area can be called the end of the positioning arc area and the beginning of the peripheral arc area, and its position can be represented by x AC The outer end of the inner surface is the end of the peripheral arc area, and its position can be represented by x PC express.
[0071] In one embodiment, the tear layer value at the center of the optical zone is equal to the first preset tear layer value;
[0072] The tear layer value at the end of the optical zone at the end of the optical zone is equal to the second preset tear layer value, wherein the second preset tear layer value is greater than the first preset tear layer value;
[0073] The first derivative of the optical zone polynomial function of the optical zone is equal to zero at the center of the optical zone.
[0074] In one embodiment, the tear layer value of the optical zone in the optical zone is greater than or equal to the first preset tear layer value and less than or equal to the second preset tear layer value.
[0075] Specifically, if the curvature radius of the wearer's cornea is Rc, and the corneal Q value is Qc, the sagittal height at each position of the cornea can be expressed as:
[0076]
[0077] The difference in sagittal height between the inner surface of the orthokeratology lens 10 and the cornea is the thickness of the tear layer, which can be expressed as:
[0078]
[0079] Figure 3 Schematic diagram of tear morphology behind a corneal reshaping lens provided according to an embodiment of the utility model. Figure 3 As shown, from the center of the cornea to the area where the cornea contacts the orthokeratology lens (i.e. x AC ), the thickness of the tear layer should be within a tear layer value range, that is, it should meet the constraints of the tear layer value range.
[0080] In this embodiment, the first preset tear layer value can be used to represent the minimum value of the tear layer value range, which is recorded as tear min The first preset tear layer value can generally be 2um-8um. The second preset tear layer value represents the maximum value of the tear layer value range, which is recorded as tear max The second preset tear layer value can generally be 20um-60um. Ai The tear layer value can be expressed as tear BC (x Ai ), A i Can represent x Ai The added light at the position.
[0081] In general, the tear layer at the center of the optical zone x0 is taken as tear BC (x0) can be equal to the first preset tear layer value tear min :
[0082] tear BC (x0) = tear min
[0083] Optical zone end x BC The tear layer at the end of the optical zone is taken as tear BC (x BC ) can be equal to the second preset tear layer value tear max :
[0084] tear BC (x BC )=tear max
[0085] Optical zone tear layer value tear BC (x Ai ) is greater than or equal to the first preset tear layer value tear min And is less than or equal to the second preset tear layer value tear max :
[0086] tear min ≤tear BC (x Ai )≤tear max
[0087] Optical zone polynomial function z BC The first derivative of (x) at the center of the optical zone x0 is equal to zero:
[0088] z′ BC (x0) = 0
[0089] In practical applications, when making orthokeratology lenses, the radius of curvature R(x) at each position in the optical zone can meet the following constraints:
[0090]
[0091] Among them, K can represent the wearer's corneal curvature, P can represent the prescription focal length, and JF can represent the overcorrection factor (Jessen Factor), which is usually set to -0.75D.
[0092] The radius of curvature R(x) at the center of the optical zone x0 can be expressed as:
[0093]
[0094] In one embodiment, the tear layer value at the beginning of the inversion arc zone is equal to the second preset tear layer value;
[0095] The first derivative of the inversion arc zone polynomial function of the inversion arc zone at the beginning of the inversion arc zone is equal to the first derivative of the optical zone polynomial function of the optical zone at the end of the optical zone;
[0096] The second derivative of the inversion arc zone polynomial function at the beginning of the inversion arc zone is equal to the second derivative of the optical zone polynomial function at the end of the optical zone.
[0097] Specifically, due to the smooth transition between the inversion arc zone and the optical zone, the sagittal height at the beginning of the inversion arc zone is equal to the sagittal height at the end of the optical zone, and the tear layer value at the beginning of the inversion arc zone is also equal to the tear layer value at the end of the optical zone. RC (x BC ) is equal to the second preset tear layer value tear max :
[0098] tear RC (x BC ) = tear max
[0099] The inversion arc polynomial function can be expressed as z RC (x). The polynomial function z of the inversion arc RC The first derivative of (x) at the beginning of the reversal arc is equal to the optical zone polynomial function z of the optical zone BC (x) First derivative at the end of the optical zone:
[0100] z′ RC (x BC ) = z′ BC (x BC )
[0101] Reverse arc polynomial function z RC (x) The second derivative at the beginning of the inversion arc is equal to the second derivative of the optical zone polynomial function at the end of the optical zone:
[0102] z′ R ' C (x BC ) = z′ B ' C (x BC )
[0103] In one embodiment, the tear layer value at the beginning of the positioning arc zone is equal to the tear layer value at the end of the inversion arc zone at the end of the inversion arc zone;
[0104] The first-order derivative of the positioning arc polynomial function of the positioning arc at the beginning of the positioning arc is equal to the first-order derivative of the reversal arc polynomial function of the reversal arc at the end of the reversal arc;
[0105] The second-order derivative of the polynomial function of the positioning arc zone at the beginning of the positioning arc zone is equal to the second-order derivative of the polynomial function of the reversal arc zone at the end of the reversal arc zone;
[0106] The tear layer value at the end of the positioning arc area is equal to zero.
[0107] Specifically, due to the smooth transition between the positioning arc zone and the inversion arc zone, the sag at the beginning of the positioning arc zone is equal to the sag at the end of the inversion arc zone, and the tear layer value at the beginning of the positioning arc zone is also equal to the tear layer value at the end of the inversion arc zone. AC (x RC ) is equal to the tear layer value at the end of the inversion arc tear RC (x RC ):
[0108] tear AC (x RC )=tear RC (x RC )
[0109] The positioning arc area polynomial function can be expressed as z AC (x). The polynomial function z of the positioning arc AC (x) The first derivative at the beginning of the positioning arc is equal to the inversion arc polynomial function z of the inversion arc RC (x) The first derivative at the end of the reversal arc:
[0110] z A ' C (x RC ) = z′ RC (x RC )
[0111] Positioning arc area polynomial function z RC (x) The second derivative at the beginning of the positioning arc is equal to the inverse arc polynomial function z RC (x) The second derivative at the end of the reversal arc:
[0112] z A ″ C (x RC ) = z′ R ' C (x RC )
[0113] Due to the need to position the orthokeratology lens, the tear layer at the end of the positioning arc zone is equal to zero:
[0114] tear AC (x AC )=0
[0115] In one embodiment, the value of the tear layer at the beginning of the peripheral arc zone is equal to zero;
[0116] The first-order derivative of the peripheral arc zone polynomial function of the peripheral arc zone at the beginning of the peripheral arc zone is equal to the first-order derivative of the positioning arc zone polynomial function of the positioning arc zone at the end of the positioning arc zone;
[0117] The second-order derivative of the surrounding arc polynomial function at the beginning of the surrounding arc is equal to the second-order derivative of the positioning arc polynomial function at the end of the positioning arc.
[0118] Specifically, due to the smooth transition between the peripheral arc zone and the positioning arc zone, the sagittal height at the beginning of the peripheral arc zone is equal to the sagittal height at the end of the positioning arc zone, and the tear layer value at the beginning of the peripheral arc zone is also equal to the tear layer value at the end of the positioning arc zone. PC (x AC ) is equal to the tear layer value at the end of the positioning arc area tear AC (x AC ), which is equal to zero:
[0119] tear PC (x AC )=0
[0120] The surrounding arc polynomial function can be expressed as z PC (x). The peripheral arc polynomial function z of the peripheral arc PC (x) The first derivative at the beginning of the peripheral arc is equal to the positioning arc polynomial function z of the positioning arc AC (x) The first derivative at the end of the positioning arc:
[0121] z′ PC (x AC )=z A ' C (x AC )
[0122] Polynomial function z of the surrounding arc area PC (x) The second derivative at the beginning of the peripheral arc is equal to the positioning arc polynomial function z AC (x) Second order derivative at the end of the positioning arc:
[0123] z′ P ' C (x AC )=z A ″ C (x AC )
[0124] In one embodiment, the first derivative of the positioning arc polynomial function at the end of the positioning arc is equal to the first derivative of the corneal function at the end of the positioning arc, wherein the corneal function is a function of the cornea of the wearer;
[0125] The second-order derivative of the positioning arc polynomial function at the end of the positioning arc is equal to the second-order derivative of the corneal function at the end of the positioning arc.
[0126] Specifically, in order to make the wearer comfortable, the orthokeratology lens can be tangent to the cornea at the contact point between the lens and the wearer's cornea, that is, the end of the positioning arc area. The corneal function can be expressed as z cornea (x), therefore, the arc area polynomial function z AC The first derivative of (x) at the end of the positioning arc is equal to the corneal function z cornea (x) The first derivative at the end of the positioning arc:
[0127] z′ AC (x AC ) = z′ cornea (x AC )
[0128] Positioning arc area polynomial function z AC The second derivative of (x) at the end of the positioning arc is equal to the corneal function z cornea (x) Second derivative at the end of the positioning arc:
[0129] z′ P ' C (x AC )=z c ″ ornea (x AC )
[0130] Correspondingly, due to the peripheral arc polynomial function z PC (x) and the polynomial function z of the positioning arc area AC (x) The first and second derivatives at the end of the positioning arc are equal, so the surrounding arc polynomial function z PC The first derivative of (x) at the end of the positioning arc is also equal to the corneal function z cornea (x) The first derivative at the end of the positioning arc:
[0131] z′ PC (x AC ) = z′ cornea (x AC )
[0132] Polynomial function z of the surrounding arc area PC The second derivative of (x) at the end of the positioning arc is also equal to the corneal function z cornea(x) Second order derivative at the end of the positioning arc:
[0133] z′ P ' C (x AC )=z c ″ ornea (x AC )
[0134] In one embodiment, the tear layer value at the end of the peripheral arc zone is equal to the third preset tear layer value, wherein the third preset tear layer value is greater than the second preset tear layer value.
[0135] Specifically, the third preset tear layer value can be expressed as tear PC The third preset tear layer value can generally be 50um-90um. The tear layer at the end of the peripheral arc area can be expressed as tear PC (x AC ):
[0136] tear PC (x AC )=tear PC
[0137] In the process of making orthokeratology lenses, objective functions can be set for different functional areas. For example, for the optical area, the objective function can be expressed as:
[0138]
[0139] When determining the parameters of the optical zone, it can be considered as a process of finding the minimum value of the objective function loss, that is, the specific parameter values can be obtained. The process of solving the parameters of other functional areas is similar.
[0140] In this embodiment, any solving tool can be used to solve the parameter values in the orthokeratology lens, and this embodiment does not limit this.
[0141] The embodiment of the utility model provides a corneal reshaping lens, the inner surface of which is divided into a plurality of functional areas from the center to the edge of the lens, and the functional areas are distributed in sequence and continuously, wherein the inner surface is a concave surface of the corneal reshaping lens close to the wearer's cornea; two adjacent functional areas on the inner surface have a smooth transition at the connection point of the areas; the inner surface of the corneal reshaping lens of the embodiment of the utility model is smooth as a whole, which reduces the discomfort of the patient when wearing it and reduces the damage to the wearer's cornea.
[0142] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.
Claims
1. A corneal reshaping lens, characterized in that: include: The inner surface of the orthokeratology lens is divided into a plurality of functional areas from the center of the lens to the edge of the lens, and the functional areas are sequentially and continuously distributed around, wherein the inner surface is the concave surface of the orthokeratology lens close to the cornea of the wearer; Two adjacent functional areas of the inner surface have a smooth transition at the area where the areas are connected; The functional area and the adjacent functional area have equal vector heights at the area connection; The first-order derivatives of the polynomial function of the functional area and the polynomial function of the adjacent functional area at the area connection are equal; The second-order derivatives of the polynomial function of the functional area and the polynomial function of the adjacent functional area at the area connection are equal.
2. The orthokeratology lens according to claim 1, characterized in that: The functional areas include an optical area, a reversal arc area, a positioning arc area and a peripheral arc area; The optical zone is located in the central area of the inner surface, the optical zone center of the optical zone is the central position of the inner surface, and the optical zone end of the optical zone is the connection end where the optical zone is connected to the reverse arc zone; The reversal arc zone is distributed around the optical zone, the reversal arc zone start end of the reversal arc zone is the connection end between the reversal arc zone and the optical zone, and the reversal arc zone end of the reversal arc zone is the connection end between the reversal arc zone and the positioning arc zone; The positioning arc zone is distributed around the reversal arc zone, the positioning arc zone start end of the positioning arc zone is the connection end between the positioning arc zone and the reversal arc zone, and the positioning arc zone end of the positioning arc zone is the connection end between the positioning arc zone and the peripheral arc zone; The peripheral arc zone is distributed around the positioning arc zone, the peripheral arc zone start end is the connection end where the peripheral arc zone and the positioning arc zone are connected, and the peripheral arc zone end is the outer end of the inner surface.
3. The orthokeratology lens according to claim 2, characterized in that: The tear layer value at the center of the optical zone at the center of the optical zone is equal to the first preset tear layer value; The tear layer value at the end of the optical zone at the end of the optical zone is equal to the second preset tear layer value, wherein the second preset tear layer value is greater than the first preset tear layer value; The first derivative of the optical zone polynomial function of the optical zone at the center of the optical zone is equal to zero.
4. The orthokeratology lens according to claim 3, characterized in that: The optical zone tear layer value in the optical zone is greater than or equal to the first preset tear layer value and less than or equal to the second preset tear layer value.
5. The orthokeratology lens according to claim 3, characterized in that: The tear layer value at the beginning of the inversion arc zone at the beginning of the inversion arc zone is equal to the second preset tear layer value; The first-order derivative of the inversion arc zone polynomial function of the inversion arc zone at the beginning of the inversion arc zone is equal to the first-order derivative of the optical zone polynomial function of the optical zone at the end of the optical zone; The second derivative of the inversion arc polynomial function at the beginning of the inversion arc is equal to the second derivative of the optical zone polynomial function at the end of the optical zone.
6. The orthokeratology lens according to claim 2, characterized in that: The tear layer value at the beginning of the positioning arc zone at the beginning of the positioning arc zone is equal to the tear layer value at the end of the inversion arc zone at the end of the inversion arc zone; The first-order derivative of the positioning arc polynomial function of the positioning arc at the beginning of the positioning arc is equal to the first-order derivative of the reversal arc polynomial function of the reversal arc at the end of the reversal arc; The second-order derivative of the positioning arc polynomial function at the beginning of the positioning arc is equal to the second-order derivative of the reversal arc polynomial function at the end of the reversal arc; The tear layer value at the end of the positioning arc area is equal to zero.
7. The orthokeratology lens according to claim 2, characterized in that: The tear layer value at the beginning of the peripheral arc zone is equal to zero; The first-order derivative of the peripheral arc zone polynomial function of the peripheral arc zone at the beginning of the peripheral arc zone is equal to the first-order derivative of the positioning arc zone polynomial function of the positioning arc zone at the end of the positioning arc zone; The second-order derivative of the peripheral arc zone polynomial function at the beginning of the peripheral arc zone is equal to the second-order derivative of the positioning arc zone polynomial function at the end of the positioning arc zone.
8. The orthokeratology lens according to claim 7, characterized in that: The first-order derivative of the positioning arc polynomial function at the end of the positioning arc is equal to the first-order derivative of the corneal function at the end of the positioning arc, wherein the corneal function is a function conforming to the cornea of the wearer; The second-order derivative of the positioning arc zone polynomial function at the end of the positioning arc zone is equal to the second-order derivative of the corneal function at the end of the positioning arc zone.
9. The orthokeratology lens according to claim 3, characterized in that: The tear layer value at the end of the peripheral arc zone is equal to the third preset tear layer value, wherein the third preset tear layer value is greater than the second preset tear layer value.