Non-orthogonal and non-axisymmetric contact lens and optical area power distribution design method thereof

Abstract

The invention discloses a non-orthogonal and non-axisymmetric contact lens and an optical area power distribution design method thereof, and the method comprises the steps: planning at least one or more than one annular curve at at least one or more than one preset position of a central optical area of the contact lens; designing a plurality of curvature values on at least one or more radial curves on at least one or more annular curves of the central optical area, and performing non-orthogonal and non-axisymmetric curvature change design on the relative position at the central optical area according to the change of the plurality of curvature values; therefore, a non-orthogonal and non-axisymmetric curved surface can be formed in the central optical area, and the design of the degree distribution of the central optical area of the contact lens can be completed, so that the purposes of stabilizing the degree of the contact lens, correcting regular and irregular astigmatism, obtaining clear vision and the like are achieved.

Description

Technical Field

[0001] The present invention relates to a non-orthogonal and non-axisymmetric contact lens and a method for designing the optical zone power distribution thereof, wherein an annular curve is obtained at a predetermined position of the central optical zone of the contact lens, and the curvature of a non-orthogonal and non-axisymmetric radial curve is designed in the central optical zone according to the curvature value of the annular curve, so as to form a predetermined curved surface, thereby achieving the purpose of clear power of the contact lens, correction of astigmatism, etc. Background Art

[0002] With the development and innovation of various electronic and electrical products, people have gained a lot of convenience in their daily life and work. In particular, the emergence of a large number of electronic products has led to the popularization of communication and Internet applications, so that many people are immersed in the use of electronic products and use them for a long time. Whether they are office workers, students or middle-aged and elderly people, the scope covered is also quite wide, which has led to the phenomenon of "phone-down tribe". As a result, many people's vision loss and damage are becoming more and more serious, and the number of myopic people has increased accordingly.

[0003] Furthermore, the reason why people suffer from myopia (also known as short-sightedness) is that the light-bending ability of the eye does not match the length of the eye. This may be due to an excessively long eye axis or a steep corneal curvature. When the total focal length of the eye is too high or too strong, the light from distant objects will be focused in front of the retina, causing the image point of the object to fall in front of the retina, resulting in blurred vision. Therefore, in order to correct myopia, it is necessary to reduce the light-bending ability of the eye. Since the light-bending ability of the cornea accounts for about 80% of the entire eye, it is only necessary to reduce the refractive power of the cornea to achieve the effect of correcting myopia.

[0004] However, the current lens optical design is mainly based on spherical, aspherical, astigmatic and free-form surfaces. Both spherical and aspherical surfaces are a type of axisymmetric design, and are mainly designed with a single curvature or aspherical formula; astigmatism and free-form surface designs are non-axisymmetric designs. Astigmatism design uses a dual-axis design to target two mutually perpendicular axes for curvature or aspherical design, and free-form surfaces use a variety of different free-form surface formulas including sampling lines, Zernike, etc. to customize designs for different areas. Since the astigmatism design is limited to mutually straight axes, instability is prone to occur on some corneas, resulting in insufficient lens power and difficulty in obtaining clear vision.

[0005] Therefore, how to solve the problem and trouble that the current contact lens design for astigmatism correction is limited to a symmetrical design that is perpendicular to the axis, which easily causes troubles and defects such as unstable degree of contact lenses when worn and unclear vision, is the direction that the relevant manufacturers engaged in this industry are eager to study and improve. Summary of the invention

[0006] Therefore, in view of the above problems and deficiencies, an object of the present invention is to provide a non-orthogonal and non-axisymmetric contact lens and a method for designing the optical zone power distribution thereof.

[0007] The present invention provides a non-orthogonal and non-axisymmetric contact lens optical zone power distribution design method, in which at least one or more annular curves are planned at at least one predetermined position in the central optical zone of the contact lens, and the curvature of at least one or more radial curves of the annular curves is calculated along the axial direction of the at least one or more annular curves in the central optical zone to obtain a complex curvature value, and according to the change of the complex curvature value, the curvature change design of at least one or more radial curves in a non-orthogonal and non-axisymmetric manner is performed for the relative position in the central optical zone, so that a non-orthogonal and non-axisymmetric curved surface can be formed in the central optical zone, and then the design of the power distribution of the central optical zone of the contact lens can be completed, so as to achieve the purpose of providing stable power of the contact lens, correcting regular and irregular astigmatism, and obtaining clear vision.

[0008] The contact lens uses the center of the circle as a reference point, and obtains at least one or more annular curves in a clockwise or counterclockwise manner around the center of the circle within the central optical zone, and the at least one or more annular curves use the center of the circle as a reference point, and then use a continuous function with a fixed period or a continuous function with a non-fixed period to design the curvature value of the curvature curve of the at least one or more annular curves. The fixed period periodic function can be a sine wave, a square wave, a sawtooth wave or other periodic function curves; and the non-fixed period continuous function can be a polynomial, exponential, Fourier, Gaussian, sum of sine or Weibull equation of the function z=f(θ).

[0009] The non-orthogonal and non-axisymmetric contact lens optical design method is to use the center of the contact lens as a reference point, rotate clockwise or counterclockwise along the central optical zone in an axial direction, and design the curvature of at least one or more radial curves on at least one or more annular curves in the central optical zone. When the central optical zone of the contact lens is designed, it is implemented through the following calculation steps: (i) first determine the position of at least one or more annular curves in the central optical zone of the contact lens; (ii) then design the curvature value of the annular curve; (iii) calculate the first design point of the central optical zone [hidden (iv) obtaining the end point [the connection position of the central optical zone and the peripheral positioning zone] and the like through the first point and the curvature of the at least one or more annular curves by calculating with a function equation, and obtaining the degree distribution curve design of the non-orthogonal, non-axisymmetric optimized curvature designed along the axial direction of the central optical zone; (v) repeating the above step (iv) to gradually complete the different curvature changes of at least one or more radial degree distribution curves presented radially from 0° to 360° within the scope of the central optical zone, and form a non-orthogonal, non-axisymmetric curved surface.

[0010] The curvature positions of different values ​​of curvature of at least one or more radial curves on the surface of the at least one or more annular curves of the central optical zone are calculated by the function z=f(θ) of the at least one or more curvatures and the angle, that is, any point a in the function f(θ) satisfies equation (I): lim θ→a+ f(θ)=f(a) and lim θ→a- f(θ)=f(a), wherein the function z can be any function z=f(θ), for example, a polynomial, exponential, Fourier, Gaussian, sum of sine or Weibull equation.

[0011] The central optical zone is designed to form one or more segments of curvature values ​​on at least one or more annular curves, and at least one or more radial curves of the central optical zone are calculated by equation (1) (i.e., the sagittal height equation): [mm], where R0 is the curvature of at least one or more annular curves in the central optical zone, and p = 1-e 2, e is the eccentricity, y0 is the radius of the central optical zone; and the edge b (bordering) of the central optical zone [the circumferential edge connected to the peripheral positioning zone] is calculated by back-calculating the diameter of the contact lens and the edge curvature.

[0012] The function z can be used as the equation (2) for calculating the function z of at least one radial curve of the surface of the central optical zone [i.e., the aspheric equation]: [mm], and in the equation (ii) of the function z mentioned above: "C = 1 / R, R is the radius of curvature of the vertex of the aspherical surface", "k = 1-e, e is the eccentricity", "when k = 1, it represents a hyperboloid", "when k = -1, it represents a parabola", "0>k>-1, it represents a semi-ellipsoidal spherical surface symmetrical with the major axis of the ellipse", "k>0, it represents a semi-ellipsoidal spherical surface symmetrical with the minor axis of the ellipse", "k = 0, it represents a spherical surface", etc.; A1, A2, A3~An, etc. are high-order coefficients of the aspherical surface, and the distance [x1] between the curvature of at least one annular curve within the central optical zone and the center point can be calculated using equation (ii), and the end point of the edge b (bordering) of the central optical zone [the circumferential edge connected to the peripheral positioning zone] can be obtained.

[0013] The equation is used to calculate at least one or more radial curves of the central optical zone, through equation (III): [mm], calculate the aspheric angle (θ) of the function z=f(θ), wherein the coordinate position of any point a on the aspheric surface of at least one or more annular curves of the function z on the surface of the central optical zone [Q(x1,y1), Cartesian coordinates; Q(r,θ), polar coordinates], Q is the arbitrary point a; the equation (III) is the Zernike formula, and the curvature radius (r) of the aspheric vertex and the curvature angle (θ) of at least one annular curve within the central optical zone are calculated by equation (III), and the end point of the edge b (bordering) of the central optical zone [the circumferential edge connected to the peripheral positioning zone] can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a plan view of the contact lens of the present invention.

[0015] Figure 2 It is a design curve diagram of the annular curve of the contact lens of the present invention.

[0016] Figure 3 This is a contact lens design curve diagram according to the first embodiment of the present invention.

[0017] Figure 4FIG. 4 is a plan view of a contact lens according to the first embodiment of the present invention.

[0018] Figure 5 This is a contact lens design curve diagram according to the second embodiment of the present invention.

[0019] Figure 6 FIG. 4 is a plan view of a contact lens according to a second embodiment of the present invention.

[0020] Figure 7 This is a contact lens design curve diagram according to the third embodiment of the present invention.

[0021] Figure 8 FIG. 4 is a plan view of a contact lens according to a third embodiment of the present invention.

[0022] Fig. 9 This is a contact lens design curve diagram according to the fourth embodiment of the present invention.

[0023] Fig.10 FIG. 4 is a plan view of a contact lens according to a fourth embodiment of the present invention.

[0024] Fig.11 It is a partial side view of the contact lens of the present invention.

[0025] Fig.12 Schematic diagram of the central optical zone of the contact lens of the present invention.

[0026] Explanation of reference numerals: 1-contact lens; 10-center of circle; 11-central optical zone; 111-annular curve; 112-radial curve; 12-peripheral positioning zone; 13-edge arc zone. DETAILED DESCRIPTION

[0027] In order to achieve the above-mentioned purpose and effect, the technical means and structures, implementation methods, etc. adopted by the present invention are illustrated in detail with reference to the preferred embodiments of the present invention, and their features and functions are as follows for a complete understanding.

[0028] See also Figures 1 to 12 As shown in the figure, it can be clearly seen that the non-orthogonal and non-axisymmetric contact lens and its optical design method of the present invention, the contact lens 1 includes a central optical zone 11, a peripheral positioning zone 12 surrounding the outside of the central optical zone 11, and an arc zone 13 surrounding the outside of the peripheral positioning zone 12, and the contact lens 1 is designed according to the following steps:

[0029] (A01) Planning the contact lens 1 at at least one predetermined position within the central optical zone 11 and designing at least one or more annular curves 111 .

[0030] (A02) Then, within the scope of the central optical zone 11, the curvature value of at least one or more annular curves 111 surrounding the central optical zone 11 is designed.

[0031] (A03) Based on the change in the curvature value of at least one annular curve 111 surrounding the central optical zone 11, the curvature value of the non-orthogonal and non-axisymmetric radial curve 112 is designed within the central optical zone 11.

[0032] (A04) Repeat step (A03) to form a non-orthogonal and non-axisymmetric curved surface design in the central optical zone 11.

[0033] (A05) Complete the power distribution design of the central optical zone 11 of the contact lens 1.

[0034] The contact lens 1 is formed by taking the center 10 as a reference point, and obtaining at least one or more annular curves 111 around the center 10 in a clockwise or counterclockwise manner within the central optical zone 11, and the at least one or more annular curves 111 are formed by taking the center 10 as a reference point, and then the curvature value of the curvature curve of the at least one or more annular curves 111 is designed by using a periodic function with a fixed period or a continuous function with a non-fixed period, etc. The periodic function with a fixed period can be a curve of various periodic functions such as a sine wave, a square wave or a sawtooth wave; and the continuous function with a non-fixed period can be a polynomial, exponential, Fourier, Gaussian, sum of sine or Weibull equation of the function z=f(θ).

[0035] The above-mentioned non-orthogonal and non-axisymmetric contact lens optical zone power distribution design method of the present invention is to use the center 10 of the contact lens 1 as a reference point, rotate clockwise or counterclockwise along the central optical zone 11 in an axial direction, and design the curvature of at least one or more radial curves 112 on at least one or more annular curves 111 on the surface of the central optical zone 11 [which can be the front side (i.e., the outer surface not attached to the eyeball) or the back side (the surface attached to the eyeball)], and when the surface of the central optical zone 11 of the contact lens 1 [which can be the front side (i.e., the outer surface not attached to the eyeball) or the back side (the inner surface attached to the eyeball)] is designed, it is implemented through the following calculation steps:

[0036] (i) First, determine the position of at least one or more annular curves 111 on the surface (either the front or the back) of the contact lens 1 within the central optical zone 11 .

[0037] (ii) performing a curvature numerical design for at least one or more annular curves 111.

[0038] (III) Obtaining a curvature design in which the first design point (starting point) of the surface of the central optical zone 11 (which can be the front or back side) is the center 10 (center point) of the contact lens 1 and at least one or more annular curves 111.

[0039] (iv) The curvature of at least one or more annular curves 111 is calculated by a functional equation to obtain an end point [the last point of the adjacent connection position between the central optical zone 11 and the peripheral positioning zone 12], etc., to obtain a non-orthogonal, non-axisymmetric optimized radial curve 112 with an annular design within the central optical zone 11.

[0040] (V) Repeat the above step (IV) to gradually complete the design of different curvature changes of at least one or more circular curves 111 radially presenting a non-orthogonal, non-axisymmetric radial curve 112 within the scope of the central optical zone 11, whose surface [can be the front or back side] is from 0° to 360°.

[0041] Therefore, by implementing the above steps, the central optical zone 11 of the contact lens 1 of the present invention has at least one or more annular curves 111 of different values ​​of at least one or more curvatures on its surface, which are calculated by at least one or more functions of curvature and angle z=f(θ), that is, any point a in the function f(θ) meets equation (II): lim θ→a+ f(θ)=f(a) and lim θ→a- f(θ)=f(a), wherein the function z can be any function z=f(θ), for example, a polynomial, exponential, Fourier, Gaussian, sum of sine or Weibull equation.

[0042] By repeating the calculation of the function z of the above equation (1) or equation (2), the numerical change of at least one or more radial curvatures presented on at least one or more radial curves 112 on the surface [which can be the front or back surface] of the central optical zone 11 within the range of 0° to 360° can be calculated respectively, so as to design the curvature change of at least one or more radial curves 112 on the surface within the range of the central optical zone 11 of the contact lens 1.

[0043] The central optical zone 11 of the contact lens 1 of the present invention is designed to form a curvature of one or more segments on at least one or more annular curves 111 on the surface of the central optical zone 11 [which may be the front or back surface], and calculates at least one or more radial curves 112 on the surface of the central optical zone 11 [which may be the front or back surface], which may be one or more segments. [Please also refer to the curve calculation method of Fig.11 As shown], then from equation (1) [that is, the arrow height equation]: [mm], where R0 is the curvature of the highest point on at least one or more radial curves 112 on the surface [which may be the front or back] of the central optical zone 11, and p=1-e 2 , e is the eccentricity, y0 is the radius of the central optical zone 11; and the edge b (bordering) of the central optical zone 11 [the circumferential edge connected to the peripheral positioning zone 12] is calculated by back-calculating the diameter of the contact lens 1 and the edge curvature.

[0044] The curvature of at least one or more radial curves 112 of the surface of the central optical zone 11 of the present invention [which may be the front surface (i.e., the outer surface not attached to the eyeball) or the back surface (the inner surface attached to the eyeball)] can be calculated by equation (2) [which may be an aspheric equation]: [mm], and in the aforementioned function z: "C = 1 / R, R is the radius of curvature of the vertex of the aspheric surface", "k = 1-e, e is the eccentricity", "when k = 1, it represents a hyperboloid", "when k = -1, it represents a parabola", "0>k>-1, it represents a semi-ellipsoidal spherical surface symmetrical about the major axis of the ellipse", "k>0, it represents a semi-ellipsoidal spherical surface symmetrical about the minor axis of the ellipse", "k = 0, it represents a spherical surface", etc.; A1, A2, A3~An, etc. are high-order coefficients of the aspheric surface, and the distance [x1] between the curvature of at least one annular curve 111 within the central optical zone 11 and the center 10 (center point) is calculated using equation (ii), and the end point of the edge b (bordering) of the central optical zone 11 [the circumferential edge connected to the peripheral positioning zone 12] can be obtained.

[0045] Furthermore, the curvature of at least one or more radial curves 112 of the surface of the central optical zone 11 of the present invention [which may be the front surface (i.e., the outer surface not attached to the eyeball) or the back surface (the inner surface attached to the eyeball)] can also be calculated by equation (III): [mm], calculate the aspheric angle (θ) of the function z=f(θ), wherein Q is the coordinate position of any point a on the aspheric surface on at least one or more annular curves 111 of the surface of the central optical zone 11 of the function z, the equation (III), calculates the aspheric angle (θ) of the function z=f(θ), wherein the coordinate position of any point a [Q(x1,y1), Cartesian coordinates; Q(r,θ), polar coordinates] on at least one or more annular curves 111 of the surface of the central optical zone 11 of the function z [which can be the front or back side], Q is the arbitrary point a; the equation (III) is the Zernike formula, and the curvature radius (r) of the aspheric vertex and the curvature angle (θ) of at least one annular curve 111 within the central optical zone 11 are calculated by using the equation (III), and the end point of the edge b (bordering) of the central optical zone 11 [the circumferential edge connected to the peripheral positioning zone 12] can be obtained.

[0046] The central optical zone 11 of the contact lens 1 of the present invention may be designed to have a curvature pattern of at least one or more radial curves 112 on at least one or more annular curves 111. The end point of the edge b (bordering) of the central optical zone 11 [the circumferential edge connected to the peripheral positioning zone 12] may be calculated by equation (1), (2) or (3).

[0047] The central optical zone 11 of the contact lens 1 of the present invention is to be designed with at least one or more annular curves 111, which represent the curvature value variation of the central optical zone 11 in different axial directions. The function lim θ→a+ f(θ)=f(a), and lim θ→a- f(θ)=f(a), for example: f(20.001)=7.001, f(19.999)=6.999 [Please also refer to Fig.11 , Figure 5 As shown, the curvature position of the annular curve 111 has a radius (y0) = 3, R0 = 8.0357, p = 0.55, e 2 =0.45, substitute it into the function, and then use the above equation (1): [mm], the curvature of the annular curve 111 on the central optical zone 11 [diameter = 6 mm, radius (y0) = 3 mm] can be obtained as R0 = 8.0357, P = 0.55, e 2 = 0.45, then the Sag of equation (1) = 0.1407 (mm) [This is a reference data, based on Fig.11 The radius (y0) shown in is calculated as a generally used predetermined value and is not the data of the embodiment of this case].

[0048] The contact lens 1 of the present invention can be applied to RGP hard contact lenses, soft contact lenses, scleral lenses or orthokeratology lenses, etc.; and the contact lens 1 is located on at least one or more annular curves 111 on the surface of the central optical zone 11, and the curvature of at least one or more radial curves 112 is designed in a non-orthogonal and non-axisymmetric manner. It can be designed according to the eye conditions of the preset user, such as: the same or different myopia, hyperopia, astigmatism, presbyopia or eyelid shape of the left eye or the right eye, etc., and at least one or more annular curves 111 are arranged on the surface of the central optical zone 11 of the contact lens 1 [which can be the front side (the outer surface not attached to the eyeball) or the back side (the inner surface attached to the eyeball)] The curvature design of the radial curve 111 and at least one or more radial curves 112 is non-orthogonal and non-axisymmetric. The curvature value change of at least one or more radial curves 112 located in the central optical zone 11 presents a non-orthogonal and non-axisymmetric design of different or same curvature values. It can meet the movement of the eyeball (up, down or left, right, etc.) or the blinking action between the eyeball and the eyelid, so as to cooperate with the situation that the eyelid contacts the contact lens 1 when blinking. It can provide the contact lens 1 with more stable wearing, stable lens power of the preset user, astigmatism correction and other unexpected effects, so as to achieve the purpose of correcting astigmatism for the regularity and irregularity of the contact lens 1, and also can obtain a clearer vision when wearing the contact lens 1.

[0049] The non-orthogonal and non-axisymmetric contact lens 1 of the present invention comprises a central optical zone 11, a peripheral positioning zone 12 surrounding the central optical zone 11, and an arc zone 13 surrounding the peripheral positioning zone 12, wherein the central optical zone 11 is located around the center 10 (center point) of the contact lens 1, and at least one or more radial curves 112 are designed with non-orthogonal and non-axisymmetric curvature value changes from the center 10 to the adjacent intersection of the central optical zone 11 and the peripheral positioning zone 12.

[0050] The central optical zone 11 may be an optical design of a spherical surface, an aspherical surface, an astigmatism, a multifocal astigmatism or a free-form surface, and the surface of the contact lens 1 may be a front surface (front surface, an outer surface not attached to the eyeball) or a rear surface (back surface, a surface attached to the eyeball), and the curvature design of at least one or more annular curves 111 is performed in an axial clockwise or counterclockwise rotation manner along the outside of the central optical zone 11, and a regular or irregular surface with a non-orthogonal, non-axisymmetric curvature change may be formed on at least one or more annular curves 111, and the curvature of at least one or more annular curves 111 may be a periodic function with a fixed period in an axial direction along the central optical zone 11, and may be a sine wave, a square wave or a sawtooth wave, etc. [Please also refer to Figure 2 , Figure 3, Figure 5 , Figure 7 , Fig. 9 As shown, the curvature of at least one or more radial curves 112 can be obtained by rotating clockwise or counterclockwise, by using curves of various periodic functions such as [θ, °], [Y], [Curvature] (mm), etc.

[0051] The above description is only a preferred embodiment of the present invention, which does not limit the scope of the present invention. Therefore, all simple modifications and equivalent structural changes made using the contents of the present invention description and drawings should be included in the scope of the present invention and are hereby stated.

[0052] In summary, the non-orthogonal and non-axisymmetric contact lens optical design method of the present invention can truly achieve its efficacy and purpose when actually implemented and used, so the present invention is truly a creation with excellent practicality.

Claims

1. A non-orthogonal and non-axisymmetric contact lens optical design method, characterized in that: The method comprises a central optical zone, a peripheral positioning zone surrounding the central optical zone, and an arc zone surrounding the peripheral positioning zone, and is implemented according to the following steps: (A01) planning the contact lens at at least one predetermined position within the central optical zone, and designing at least one or more annular curves; (A02) designing the curvature value of the at least one or more annular curves surrounding the central optical zone within the range of the central optical zone; (A03) designing the curvature values ​​of non-orthogonal and non-axisymmetric radial curves within the central optical zone according to the change of the curvature values ​​of the at least one or more annular curves surrounding the central optical zone; (A04) repeating the step (A03) to form a non-orthogonal and non-axisymmetric radial curved surface design in the central optical zone; and (A05) Complete the power distribution design of the central optical zone of the contact lens.

2. The non-orthogonal and non-axisymmetric contact lens optical design method according to claim 1, characterized in that: The contact lens in step (A01) takes the center of the circle as a reference point, and plans at least one or more annular curves in the central optical zone that surround the center of the circle in a clockwise or counterclockwise manner.

3. The non-orthogonal and non-axisymmetric contact lens optical design method according to claim 2, characterized in that: The curvature value of the at least one or more annular curves is designed using a periodic function with a fixed period or a continuous function with a non-fixed period along the center of the contact lens as a reference point.

4. The non-orthogonal and non-axisymmetric contact lens optical design method according to claim 3, characterized in that: The periodic function of the fixed period is a sine wave, a square wave or a sawtooth wave, and any point (a) in the continuous function of the non-fixed period is a polynomial, exponential function, Fourier, Gaussian, sine sum or Weibull equation that conforms to the function z=f(θ).

5. The non-orthogonal and non-axisymmetric contact lens optical design method according to claim 2, wherein: The contact lens is rotated clockwise or counterclockwise along the central optical zone in an axial direction with the center of the circle as the reference point, and the curvature of at least one or more radial curves on the at least one or more annular curves is obtained in the central optical zone. When the central optical zone of the contact lens is designed, the following calculation steps are implemented: (1) first determining the position of at least one or more annular curves on the surface of the contact lens within the central optical zone; (2) designing the curvature value of the at least one or more annular curves; (3) obtaining the first design point of the surface of the central optical zone, i.e., the center of the contact lens, and the curvature design of the at least one or more annular curves; (iv) obtaining an end point by calculating the curvature of the at least one or more annular curves through a functional equation, thereby obtaining the at least one or more radial curves that are non-orthogonal and non-axisymmetric and are designed in an annular shape within the central optical zone; (V) Repeat the above step (IV) to gradually complete the design of different curvature changes of the at least one or more radial curves presenting a radial angle of 0° to 360° within the range of the central optical zone.

6. The non-orthogonal and non-axisymmetric contact lens optical design method according to claim 5, characterized in that: The central optical zone is a curvature design method of one or more segments on the at least one or more annular curves. The at least one or more radial curves of the central optical zone are calculated by equation (1): [mm], where R0 is the curvature of the highest point of the at least one or more annular curves in the central optical zone, and p=1-e 2 , e is the eccentricity, y0 is the radius of the central optical zone; and the edge b of the central optical zone is calculated by back-calculating the diameter of the contact lens and the edge curvature.

7. The non-orthogonal and non-axisymmetric contact lens optical design method according to claim 5, characterized in that: The equation is designed to calculate different variations of the curvature of at least one or more annular curves in the central optical zone, and the calculation method is the function z=f(x) of the curvature and angle of the at least one or more annular curves, that is, any point a in the function f(x) satisfies equation (II): lim θ→a+ f(θ)=f(a) and lim θ→a- f(θ)=f(a), wherein the function z is an arbitrary function z=f(θ); then the function z is used as the function of equation (II) for calculating the different changes in the curvature of the at least one or more radial curves of the surface of the central optical zone: [mm], in the function z: "C = 1 / R, R is the radius of curvature of the vertex of the aspheric surface", "k = 1-e, e is the eccentricity", "when k = 1, it represents a hyperboloid", "when k = -1, it represents a parabola", "0>k>-1, it represents a semi-ellipsoidal spherical surface symmetrical with the major axis of the ellipse", "k>0, it represents a semi-ellipsoidal spherical surface symmetrical with the minor axis of the ellipse", "k = 0, it represents a spherical surface"; A1, A2, A3~An are high-order coefficients of the aspheric surface, and the distance x1 between the curvature of at least one annular curve within the central optical zone and the center of the circle is calculated using equation (ii) to obtain the end point of the edge b of the central optical zone.

8. The non-orthogonal and non-axisymmetric contact lens optical design method according to claim 5, characterized in that: The equation is used to calculate the curvature of the at least one or more radial lines of the central optical zone, via equation (III): [mm], calculate the aspheric angle (θ) of the function z=f(θ), wherein the function z is the coordinate position of any point a on the aspheric surface of at least one or more annular curves on the surface of the central optical zone, and the coordinate position of any point a on the at least one or more annular curves on the surface, its Cartesian coordinates are Q(x1,y1), and the polar coordinates are Q(r,θ), Q is the arbitrary point a, and the equation (III) is the Zernike formula.

9. A non-orthogonal and non-axisymmetric contact lens, comprising a central optical zone, a peripheral positioning zone surrounding the central optical zone, and an edge arc zone surrounding the peripheral positioning zone, characterized in that: The central optical zone is located around the center of the contact lens, and at least one or more annular curves from the center to the adjacent intersection of the central optical zone and the peripheral positioning zone obtain at least one or more radial curvatures to form a non-orthogonal, non-axisymmetric curved surface.

10. The non-orthogonal and non-axisymmetric contact lens according to claim 9, wherein: The central optical zone is optically designed to be spherical, aspheric, astigmatic, multifocal astigmatic or free-form, and the surface of the contact lens is the front surface or the back surface. The curvature design of the at least one or more annular curves is planned to be performed by clockwise or counterclockwise rotation along the outer axis of the central optical zone, and the at least one or more annular curves form a regular or irregular surface of the curvature of the at least one or more radial curves that is non-orthogonal and non-axisymmetric, and the curvature of the at least one or more annular curves is a periodic function of a sine wave, a square wave or a sawtooth wave with a fixed period in the axial direction at the central optical zone. The curvature design of the at least one or more radial curves is performed by clockwise or counterclockwise rotation.

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