TWI584022B - Progressive multifocal contact lens and producing method thereof - Google Patents

Description

Asymptotic zoom contact lens and manufacturing method thereof

The present invention relates to a lens and method thereof, and more particularly to an asymptotic zoom contact lens and a method of fabricating the same.

Contact lenses are widely used to correct many different types of visual impairments, including myopia and hyperopia, astigmatic vision errors, and near vision defects commonly associated with aging such as presbyopia vision degradation. Presbyopic lenses often use contact lenses to correct defects in presbyopia, such as synchronized bifocal contact lenses or zoom contact lenses to provide concentric optical areas such as far vision power (farther objects) and myopic power (near objects) to focus pupils. Visible range, because light from farther objects and near objects is simultaneously focused on the retina, and the user's brain judges and selects farther images or closer images.

However, since the synchronous bifocal contact lens or the zoom contact lens includes a plurality of concentric regions, that is, a far vision region and a near vision region, the refractive power distribution from the center of the optical region to the peripheral region is a discrete state, and each The width of the concentric area of one circle and the number of turns must be designed differently according to the user's pupil value, so that the discrete state of the refractive power distribution is more obvious, which reduces the visual quality of the user. In some conventional techniques, the interface between the area of hyperopic diopter and the area of myopic diopter is not smooth enough to cause contact lenses. Interference occurs when the user views the image in these optical areas. Further, a transition region of the diopter corresponding to the surface of the connection interface forms a discontinuity, causing overlapping images to affect the comfort of the user.

In other conventional techniques, in order to solve the problem of discontinuity, a combination of a plurality of conical curves is used in the central optical region, but this method requires the use of high-order geometric lines at the joint point, which is quite complicated and is not easy to improve. The problem of discontinuity in the optical area of the contact lens and the diopter. Therefore, it is necessary to propose a new type of lens and a method thereof to solve the above problems.

It is an object of the present invention to provide an asymptotic zoom contact lens and a method of fabricating the same that form a continuous non-uniform rational B-spline (NURBS) profile and asymptotic configuration by a front optical surface ( Progressive) The varying diopter to improve the user's vision and improve the design flexibility of the contact lens.

To achieve the above object, an asymptotic zoom contact lens according to an embodiment of the present invention includes: an optical axis; a front side surface having a first optical area, wherein the optical axis is a center of the first optical area, the An optical region includes a central region near the optical axis, an annular region, and an intermediate region connected between the central region and the annular region, wherein the central region and the annular region are respectively set to be different The diopter includes a far vision diopter and a myopic diopter, and the intermediate region is used to asymptotically adjust the optical power of the far vision diopter and the near vision diopter, such that the first optical region of the front side surface is at the far vision diopter and The dioptric power between the myopic diopter forms a continuous normal distribution; and a side surface having a second optical region with the optical axis as the center of the second optical region, The rear side surface is disposed opposite to the front side surface in accordance with the optical axis, wherein an edge of the front side surface and an edge of the rear side surface are interconnected.

In an embodiment, the front side surface further includes a peripheral area connected to a peripheral edge of the annular area, and the peripheral area is either a spherical area or an aspherical area.

In an embodiment, the diopter is expressed by the following formula: , wherein the mean μ = xc + (Wim / 2), the standard deviation σ = Wim / 6; Add is the coefficient of the additional diopter; x is the radius from the optical axis along the first optical region; Pc is the myopic diopter of the central region Or far vision diopter; xc is the radius of the central region; Wim is the width of the middle region; t is the integral variable of the length; and in the "±" symbol, "+" indicates that the central region is the far vision diopter, and "-" indicates the central region. For myopic diopter.

In one embodiment, the central region has a radius xc greater than or equal to zero mm and xc is less than 1 mm, the intermediate region has a width Wim greater than zero mm, and Wim is less than or equal to 3 mm.

In an embodiment, the central region is set to a far vision diopter and the annular region is set to myopic diopter, or the central region is set to myopic diopter and the ring The shaped area is set to the far vision diopter.

In one embodiment, the radius of the central region, the width of the intermediate region, and the additional diopter of the first optical region are used to adjust a continuous normal distribution of diopter of the first optical region.

In an embodiment, the central region, the annular region, and the intermediate region of the first optical region are continuous surfaces composed of a non-uniform rationalized shaping curve (NURBS).

In an embodiment, the non-uniform rationalized shaping curve (NURBS) is represented by the following formula: , where the order p is defined by: control points P0, P1, ..., Ph, node vector U, and weight values w0, w1, ..., wh.

In an embodiment, the central region of the first optical region has the same slope value as each connection point of the intermediate region, and the intermediate region has the same connection point with each connection point of the annular region The slope value.

A method of fabricating an asymptotic zoom contact lens according to another embodiment of the present invention includes: providing an optical axis to a body; forming a front side surface having a first optical region, wherein the optical axis serves as a center of the first optical region The first optical region includes a central region near the optical axis, an annular region, and an intermediate region connected between the central region and the annular region, wherein the central region and the annular region are Set to different diopters respectively including far vision diopter and myopic diopter; adjusting the intermediate region for asymptotic adjustment The power of the far vision diopter and the myopic diopter, such that the first optical region of the front side surface forms a continuous normal distribution of diopter between the distance vision diopter and the near vision diopter; and forms a second optical a rear side surface of the region, the optical axis being the center of the second optical region, the rear side surface being disposed opposite to the front side surface according to the optical axis, wherein an edge of the front side surface is The edges of the rear side surfaces are connected to each other.

100‧‧‧ body

102‧‧‧ optical axis

104‧‧‧ front side surface

104a, 106a‧‧‧ edge

106‧‧‧Back surface

108‧‧‧First optical zone

110‧‧‧Central area

112‧‧‧ring area

114‧‧‧Intermediate area

115‧‧‧ surrounding area

116‧‧‧Second optical zone

Add‧‧‧Additional diopter coefficient

X‧‧‧first optical area radius

Xc‧‧‧ center area radius

Wim‧‧ mid-zone width

‧‧‧‧ average

Σ‧‧ standard deviation

T‧‧‧ integral variable

P(x)‧‧‧ diopter curve

Pc‧‧ diopter

E1, E1a, E1b‧‧‧ formula

E2, E21, E22, E23, E24‧‧ formula

P0, P1, ..., Ph‧‧‧ control points

W0, w1, ..., wh‧‧ ‧ weight value

P‧‧‧ order

U‧‧‧ node vector

C(u)‧‧‧ Uniform rationalized shaping curve

C11~C15, C21~C26, C31~C36‧‧‧Various diopter curves

K‧‧‧curvature

R‧‧‧ radius of curvature

S900, S902, S904, S906, S908, S910‧‧ steps

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described. FIG. 1 is a top view of an asymptotic zoom contact lens in an embodiment of the present invention.

2 is a cross-sectional view of the asymptotic zoom contact lens taken along line AA' of FIG. 1 in the embodiment of the present invention.

3 is a schematic diagram showing the diopter curve of the asymptotic zoom contact lens in the embodiment of the present invention.

4 is a schematic diagram showing an additional diopter curve of a central region having different diameters and set to myopic diopter in an embodiment of the present invention.

FIG. 5 is a schematic diagram showing an additional diopter curve in which the annular regions have different widths and the central region is set to myopic diopter in the embodiment of the present invention.

6 is a schematic diagram showing an additional diopter curve in which the annular regions have different widths and the central region is set to the far vision diopter in the embodiment of the present invention.

7 is a schematic diagram showing a non-uniform rationalized shaping curve (NURBS) of an asymptotic zoom contact lens in an embodiment of the present invention.

8A-8B illustrate a non-first optical region of an asymptotic zoom contact lens in accordance with an embodiment of the present invention. A schematic diagram of a uniform rationalized shape curve (NURBS) and its corresponding additional diopter curve.

FIG. 9 is a flow chart showing a method of manufacturing an asymptotic zoom contact lens according to an embodiment of the present invention.

Referring to the drawings, wherein like reference numerals refer to the same or the The following description is based on the specific embodiments of the invention, which are not to be construed as limiting the invention.

1 and FIG. 2, FIG. 1 is a top view of an asymptotic zoom contact lens in accordance with an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the asymptotic zoom contact lens taken along line AA' of FIG. 1 in the embodiment of the present invention. As shown in FIGS. 1 and 2, the asymptotic zoom contact lens includes a body 100, an optical axis 102, a front side surface 104, and a rear side surface 106. The optical axis 102 passes through the body 100, the optical axis 102, the front side surface 104, and the rear side surface. 106, and the optical axis 102 is defined as the central axis of the asymptotic zoom contact lens, which may be axisymmetric or non-axisymmetric, as shown in the axisymmetric state of FIG. The front side surface 104 and the rear side surface 106 are respectively disposed on opposite side surfaces of the body 100 and are interconnected at a peripheral edge of the body 100, that is, at an edge 104a of the front side surface 104 and an edge of the rear side surface 106. 106a is connected to each other.

In FIGS. 1 and 2, the front side surface 104 has a first optical region 108, the first optical region 108 including a central region 110, an annular region 112, and a central region in accordance with the optical axis 102 as a center. An intermediate region 114 between the 110 and the annular region 112, wherein the central region 110 and the annular region 112 are set to a distance vision power and a near vision power, and the intermediate region 114 for asymptotically adjusting the optical power of the far vision diopter and the myopic diopter to make the front side surface 104 The diopter of the first optical region 108 forms a normal cumulative distribution. In an embodiment, the central region 110 is set to a far vision diopter and the annular region 112 is set to myopic diopter, or the central region 110 is set to myopic diopter and the annular region 112 is set to a far vision diopter. In one embodiment, the first optical region 108 of the front side surface 104 corresponds to the user's bore (not shown) along the optical axis 102. The front side surface 104 further includes a peripheral region 115 connected to the periphery of the annular region 112, and the peripheral region 115 is a spherical region or an aspherical region.

As shown in FIGS. 1 and 2, the rear side surface 106 has a second optical region 116 that is disposed on opposite sides of the front side surface 104 in accordance with the optical axis 102. In an embodiment, the back side surface 106 and the second optical region 116 are, for example, spherical or aspherical surfaces. In one embodiment, the second optical region 116 of the back side surface 106 contacts the user's bore (not shown) along the optical axis 102.

Referring to FIG. 3, a schematic diagram of a diopter curve of an asymptotic zoom contact lens in an embodiment of the present invention is shown. The horizontal axis is the radius from the optical axis 102 (the position of the radius equal to zero) along the first optical region, represented by x, the unit of which is, for example, millimeters (mm), and the vertical axis represents the additional power, the unit of which is D (diopters), the diopter of the present invention is defined as the reciprocal of the focal length of the contact lens. As shown in Fig. 3, the diopter P(x) of the present invention is expressed by the following formula: Where, the mean μ=xc+(Wim/2), the standard deviation σ=Wim/6, “/” represents the sign of the division; Add is the coefficient of the additional diopter, which is the maximum (max) and minimum of FIG. The difference between (min) is calculated, for example, -0.5-(-3.0) = 2.5D; x is the radius from the optical axis 102 along any position of the first optical region 108; Pc is the myopic diopter of the central region 110 or Is the far vision diopter; xc is the radius of the central region 110; Wim is the width of the intermediate region 114; t is the integral variable of the length; and in one embodiment, the "+" in the "±" symbol indicates that the central region 110 is the far vision diopter "-" indicates that the central region 110 is myopic diopter.

As shown in FIG. 3, the radius of the central region 110, the width of the intermediate region 114, and the additional diopter of the first optical region 108 are used to adjust the continuous normal distribution of the diopter of the first optical region 108. Specifically, the shape of the diopter curve of the asymptotic zoom contact lens of the present invention and its rate of change are adjusted and controlled by three variables: the radius xc of the central region 110, the width Wim of the intermediate region 114, and the coefficient ADD of the additional diopter. The shape and size of the pupil suitable for the user, for example, the pupil size is between 2 mm and 6 mm. In a preferred embodiment, the radius xc of the central region 114 is greater than or equal to zero mm, and xc is less than 1 mm, but is not limited thereto, and may be adjusted for sizes suitable for different pupils; The width Wim of 114 is greater than zero mm, and Wim is less than or equal to 3 mm, but is not limited thereto, and can be adjusted for sizes suitable for different pupils, so that the present invention can improve the design flexibility of the asymptotic zoom contact lens.

Referring to FIG. 4, a schematic diagram of an additional diopter curve having central regions 110 having different diameters and set to myopic diopter is shown in an embodiment of the present invention. In Figure 4, the additional diopter curve is expressed by the following formula: Where Pc is the myopic diopter of the central region 110.

In the embodiment of FIG. 4, Pc is -0.5D, Wim is 1.5mm, and Add is 2.5D, and the radius xc is, for example, 0.0, 0.2, 0.4, 0.6, and 0.8mm, respectively corresponding to various diopter curves C11~C15. The first optical region 108 of the front side surface 104 from the central region 110 through the intermediate region 114 to the annular region 112 effectively provides a smooth and continuous preferred diopter curve.

Referring to FIG. 5, there is shown a schematic diagram of an additional diopter curve in which the annular region 112 has different widths and the central region 110 is set to myopic diopter in an embodiment of the present invention. Referring to formula (E1a), Pc is -0.5D, radius xc is 0.6mm, Add is 2.5D, and Wim is, for example, 0.5, 0.7, 0.9, 1.1, 1.3, and 1.5mm, corresponding to various diopter curves C21~C26, respectively. The first optical region 108 of the front side surface 104 from the central region 110 through the intermediate region 114 to the annular region 112 effectively provides a smooth and continuous preferred diopter curve.

Referring to Figure 6, there is shown a schematic diagram of an additional diopter curve in which the annular regions 112 have different widths and the central region 110 is set to a far vision diopter in an embodiment of the present invention. In Figure 6, the additional diopter curve is expressed by the following formula: Where Pc is the far vision diopter of the central region 110.

In the embodiment of FIG. 6, Pc is -3.0D, radius xc is 0.6mm, Add is 2.5D, and Wim is, for example, 0.5, 0.7, 0.9, 1.1, 1.3, and 1.5 mm, respectively corresponding to various diopter curves C31. ~C36, the larger the value of Wim, the smoother the change in diopter. In this embodiment The various diopter curves in the first optical region 108 of the front side surface 104 from the central region 110 through the intermediate region 114 to the annular region 112 effectively provide a smooth and continuous preferred diopter curve.

Referring to FIG. 7, a schematic diagram of a non-uniform rational B-spline (NURBS) of an asymptotic zoom contact lens in an embodiment of the present invention is shown. As shown in FIG. 7, the non-uniform rationalized shaping curve (NURBS) C(u) is expressed by the following formula: , where the order p is defined by: control points P0, P1, ..., Ph, node vector U, and weight values w0, w1, ..., wh, the number of operations is expressed as i = 0 to i =h.

The node vector U is expressed by the following formula: The ith shaping curve (B-spline) with the order p is a polynomial function combination and is expressed by the following formula: The curvature of any point on the non-uniform rationalized shaping curve (NURBS) is expressed by the following formula: The radius of curvature R=(1/k) of the arbitrary point is adjusted by the curvature radius R so that the non-uniform rationalized shaping curve (NURBS) forms a continuous surface.

In an asymptotic zoom contact lens of an embodiment of the invention, the central region 110 of the first optical region 108, the annular region 112 and the intermediate region 114 are formed by a non-uniform rationalized shaping curve (NURBS) ) a continuous surface composed of. In another embodiment, the central region 110 of the first optical region 108 has the same slope value as each of the connection points of the intermediate region 114, and the intermediate region 114 and the annular region 112 Each connection point has the same slope value to form a smooth front surface of the front side surface 104 having the first optical region 108, as shown in Figures 1 and 2, and for the diopter curve of Figure 3.

8A-8B are schematic diagrams showing a non-uniform rationalized shape curve (NURBS) of a first optical region 108 of an asymptotic zoom contact lens and its corresponding additional diopter curve in an embodiment of the present invention. In FIG. 8A, the horizontal axis represents x as the radius from the optical axis 102 along the first optical region 108, and the vertical axis represents the concave depth FS (mm) of the front side surface, and the horizontal axis and the vertical axis of FIG. 8B are as shown in FIG. . The non-uniform rationalized shaping curve (NURBS) of FIG. 8A forms the central region 110, the annular region 112, and the intermediate region 114 of the first optical region 108 of FIG. 1, and corresponds to an additional diopter curve, which is formed by the front optical surface. The contour of the non-uniform rationalized shaping curve and the configuration of the asymptotically varying diopter to solve the problem of discontinuity in the transition region of the diopter in the prior art, and the non-uniform rationalized shaping curve (NURBS) is easy to adjust and control, improve the habit Know the complex design of high-order geometric lines in the technology to improve design flexibility.

Referring to FIGS. 1 to 4, FIGS. 8A-8B and FIG. 9, FIG. 9 is a flow chart showing a method of manufacturing an asymptotic zoom contact lens according to an embodiment of the present invention. The method for manufacturing the asymptotic zoom contact lens comprises the following steps:

In step S900, the data of the asymptotic zoom contact lens is input, for example, including the user's cornea shape, far vision diopter, myopic diopter, contact lens material (for example, soft material or hard material), optical region diameter, and contact lens. thickness of. An optical axis 102 is provided to a body 100.

In step S902, the diopter curve is determined according to the additional diopter curves shown by the formulas (E1a) and (E1b).

In step S904, the surface of the rear side surface 106 is determined, for example, a spherical surface or an aspheric surface. Specifically, a rear side surface 106 having a second optical region 116 is formed with the optical axis 102 as the center of the second optical region 116, the rear side surface 106 being in accordance with the optical axis 102 and the front side The surface 104 is disposed opposite the sides, wherein the edge of the front side surface 104 is interconnected with the edge 106a of the back side surface 106 of 104a.

In step S906, the front side surface 104 is calculated using a ray tracing method and a numerical analysis method to form a non-uniform rationalized shaping curve (NURBS). In an embodiment, the radius of each point on the front side surface 104 satisfies the additional diopter curve shown by equations (E1a) and (E1b). Further, a non-uniform rationalized shaping curve (NURBS) is formed according to the formulas (E2), (E21), (E22), and (E23). Specifically, a front side surface 104 having a first optical region 108 is formed with the optical axis 102 as the center of the first optical region 108, and the first optical region 108 is included near the optical axis 102. a central region 110, an annular region 112, and an intermediate region 114 connected between the central region 110 and the annular region 112, wherein the central region 110 and the annular region 112 are respectively set to different diopter, including hyperopia Diopters and myopic diopter. Next, the intermediate region 114 is adjusted to asymptotically adjust the optical power of the far vision diopter and the near vision diopter such that the first optical region of the front side surface 104 The diopter between the far vision diopter and the myopic diopter forms a continuous normal distribution. The central region 110, the annular region 112, and the intermediate region 114 of the first optical region 108 are continuous surfaces composed of a non-uniform rationalized shaping curve (NURBS).

In step S908, the peripheral region 115 of the front side surface 104 and its corresponding rear side surface 106 are calculated to suit the wearing comfort of the user's eyes.

In step S910, an asymptotic zoom contact lens having a non-uniform rationalized shaping curve (NURBS) is output. For example, a computer aided design (CAD) model is used and processed by a numerical control machine (CNC) to produce an asymptotic zoom contact lens with a non-uniform rationalized shape curve (NURBS). Specifically, the method for manufacturing the asymptotic zoom contact lens of the present invention may use a processor or a microcontroller to execute a code stored in a memory (eg, non-volatile memory, RAM, ROM), and will asymptotically The pre-processed and processed data and parameters of the zoom contact lens are stored in the memory, and the above-described manufacturing steps of the present invention are performed by the operation of computer program instructions.

In summary, the asymptotic zoom contact lens of the present invention and the method for fabricating the same have improved contour of the user by forming a contour of the continuous non-uniform rationalized shaping curve and configuring an asymptotically varying diopter by the front optical surface. The present invention uses a continuous NURBS curve as the surface profile of the front side optical surface to gradually change the optical power from the proximal or distal end to the opposite focal length. In addition, the present invention has a high degree of design freedom (elasticity) of the refractive power distribution to suit the vision needs of a particular presbyopic eye. By using the NURBS curve, the present invention can not only make the front side surface smooth and continuous, but also satisfy The various refractive power distribution states of the pupil radius and the need for additional refractive power values.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. The invention is intended to be limited to the scope of the invention, and the scope of the invention is defined by the scope of the appended claims. Prevail.

100‧‧‧ body

102‧‧‧ optical axis

104‧‧‧ front side surface

108‧‧‧First optical zone

110‧‧‧Central area

112‧‧‧ring area

114‧‧‧Intermediate area

115‧‧‧ surrounding area

X‧‧‧first optical area radius

Claims (18)

An asymptotic zoom contact lens comprising: an optical axis; a front side surface having a first optical region with the optical axis as a center of the first optical region, the first optical region being included near the optical axis a central region, an annular region, and an intermediate region connected between the central region and the annular region, wherein the central region and the annular region are respectively set to different diopters including far vision diopter and myopic diopter, and The intermediate region is configured to asymptotically adjust the optical power of the far vision diopter and the near vision diopter, such that the first optical region of the front side surface forms continuity of diopter between the distance vision diopter and the near vision diopter a normal distribution; and a rear side surface having a second optical region with the optical axis as a center of the second optical region, the rear side surface being disposed opposite to the front side surface according to the optical axis, wherein An edge of the front side surface and an edge of the rear side surface are interconnected. The asymptotic zoom contact lens of claim 1, wherein the front side surface further comprises a peripheral region connected to a peripheral edge of the annular region, and the peripheral region is a spherical region or an aspheric region. One. The asymptotic zoom contact lens of claim 1, wherein the diopter is expressed by the following formula: Wherein the mean μ = xc + (Wim / 2), the standard deviation σ = Wim / 6; Add is the coefficient of the additional diopter; x is the radius from the optical axis along the first optical region; Pc is the The near vision diopter or the far vision diopter of the central region; xc is the radius of the central region; Wim is the width of the intermediate region; t is the integral variable of the length; and in the "±" symbol, "+" indicates the The central region is hyperopic diopter, and "-" indicates that the central region is myopic diopter. The asymptotic zoom contact lens of claim 1, wherein the central region has a radius xc greater than or equal to zero mm, and xc is less than 1 mm, and the intermediate portion has a width Wim greater than zero mm, and Wim is less than or equal to 3 mm. The asymptotic zoom contact lens of claim 1, wherein the central region is set to a far vision diopter and the annular region is set to myopic diopter, or the central region is set to myopic diopter and the annular region Set to far vision diopter. The asymptotic zoom contact lens of claim 1, wherein the radius of the central region, the width of the intermediate region, and the additional diopter of the first optical region are used to adjust the diopter of the first optical region. The continuous normal distribution. The asymptotic zoom contact lens of claim 1, wherein the central region, the annular region, and the intermediate region of the first optical region are formed by a non-uniform rationalized shaping curve (NURBS) The composition of the continuous surface. The asymptotic zoom contact lens of claim 7, wherein the non-uniform rationalized shaping curve (NURBS) is expressed by the following formula: Where the order p is defined by: control points P0, P1, ..., Ph, node vector U, and weight values w0, w1, ..., wh. The asymptotic zoom contact lens of claim 1, wherein the central region of the first optical region has the same slope value as each of the connection points of the intermediate region, and the intermediate region Each connection point of the annular region has the same slope value. A method of manufacturing an asymptotic zoom contact lens, comprising: providing an optical axis to a body; forming a front side surface having a first optical region, wherein the optical axis is a center of the first optical region, the first optical The region includes a central region near the optical axis, an annular region, and an intermediate region connected between the central region and the annular region, wherein the central region and the annular region are respectively set to different diopter Including a far vision diopter and a myopic diopter; adjusting the intermediate region to asymptotically adjust the optical power of the far vision diopter and the near vision diopter, such that the first optical region of the front side surface is at the far vision diopter and the near vision The diopter between the diopter forms a continuous normal distribution; and forms a rear surface having a second optical region with the optical axis as the center of the second optical region, the rear surface being in accordance with the optical axis The front side surface is disposed opposite the opposite side, wherein an edge of the front side surface and an edge of the rear side surface are interconnected. The method of manufacturing an asymptotic zoom contact lens according to claim 10, wherein the front side surface further comprises a peripheral region connected to a peripheral edge of the annular region. The edge, and the peripheral area is either a spherical area or an aspherical area. The method of manufacturing an asymptotic zoom contact lens according to claim 10, wherein the diopter is expressed by the following formula: Wherein the mean μ = xc + (Wim / 2), the standard deviation σ = Wim / 6; Add is the coefficient of the additional diopter; x is the radius from the optical axis along the first optical region; Pc is the The near vision diopter or the far vision diopter of the central region; xc is the radius of the central region; Wim is the width of the intermediate region; t is the integral variable of the length; and in the "±" symbol, "+" indicates the The central region is hyperopic diopter, and "-" indicates that the central region is myopic diopter. The method for manufacturing an asymptotic zoom contact lens according to claim 10, wherein the radius xc of the central region is greater than or equal to zero mm, and xc is less than 1 mm, and the width Wim of the intermediate region is greater than zero PCT, and Wim is less than or equal to 3 mm. The method of manufacturing an asymptotic zoom contact lens according to claim 10, wherein the central region is set to a far vision diopter and the annular region is set to myopic diopter, or the central region is set to myopic diopter and The annular region is set to the far vision diopter. A method of manufacturing an asymptotic zoom contact lens according to claim 10, wherein The radius of the central region, the width of the intermediate region, and the additional diopter of the first optical region are used to adjust a continuous normal distribution of diopter of the first optical region. The method of manufacturing an asymptotic zoom contact lens according to claim 10, wherein the central region, the annular region, and the intermediate region of the first optical region are formed by a non-uniform rationalized shaping curve ( A continuous surface composed of NURBS). The method of manufacturing an asymptotic zoom contact lens according to claim 16, wherein the non-uniform rationalized shaping curve (NURBS) is expressed by the following formula: , where the order p is defined by: control points P0, P1, ..., Ph, node vector U, and weight values w0, w1, ..., wh. The method of manufacturing an asymptotic zoom contact lens according to claim 10, wherein the central region of the first optical region has the same slope value as each of the connection points of the intermediate region, and the middle The region has the same slope value as each connection point of the annular region.