TW571142B - Multifocal aspheric lens - Google Patents

Abstract

The present invention provides a lens having a plurality of vision areas. The plurality of areas including a first vision area, a second vision area surrounding the first vision area, and a third vision area surrounding the second vision area. The first vision area having a first power, the second vision area having a range of powers, and the third vision area having a second power distinct from the first power. One of the first, second and third vision areas having an aspheric surface designed to provide a monotonic gradient in power and the other areas having either spherical surfaces to provide single power values or aspheric surfaces designed to correct optical aberrations within these single power areas.

Description

571142 A7 V. Description of the invention (1 The consumer cooperation of the Intellectual Property Bureau of the Ministry of Economic Affairs, Du printed the relevant application filed earlier, and the scope of the stated patent of this application is based on August 6, 1998. 1 USC § 119 (e) Zhizhi 眭 by iJ Ό ㈡ & Chu 35 § (and the temporary application of the serial number 6_95,60m of the application ', the advantages of the month', the content of its disclosure is incorporated here for reference. Common background of the invention For the visual area, please refer to the type of bifocal contact lens. The long-distance and short-range optical magnifications are simultaneously positioned in the user's eye area. In the traditional clinical understanding of the common visual area, the double-point lens will Far and near images are transmitted to the retina at the same time. According to the viewing distance of the relevant object, one of the images will be in focus, and the other will be out of focus. I believe that the brain can ignore the side Important and out-of-focus images, and only the relevant, in-focus images are processed. Therefore, regardless of the distance of the object, the lens can still provide acceptable vision to many patients. Attempts have been made to provide many contact lenses with a common vision area. One type of contact lenses with the same vision area is a concentric area bifocal lens, in which the far and near magnifications form two concentric optical areas. These lenses have built-in The center distance or the center is close to the structure. The selection of the feet of the two areas makes it possible to provide approximately the same area of long distance and close distance magnification in the pupil area of the eye. The advantage of this lens is that the lens is provided for users to face each other. Large visual area. However, because the size of the pupil will change with the intensity of the user and the surrounding light, the relative area of the far and near magnifications will deviate significantly from the normal track, making the near or far visual area stronger. While sacrificing another area of vision. Because this kind of pupil with a common mirror lens ---------- install -------- order --------- (please first Read the notes on the reverse side and fill out this page) -4- This paper size applies to Chinese National Standard (CNS) A4 (210 X 297 mm) 571142 A7 B7 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs V. Description of the invention (2) The dependence of $ size cannot be controlled by the user's consciousness, so this kind of far or near offset cannot meet the visual needs of some specific users. Ma reduces this and pupil size Depending on the relationship, additional concentric areas will be incorporated into the lens, for example, refer to US Patent No. 4,704,016 (Cohen). The bifocal optical area of this lens sum is composed of a series of concentric rings, which must be located in the pupil of the eye And interactively provide the distance and near magnification. But as the number of rings increases, if the area (or at least a considerable part of it) is to remain in the pupil, the width of each ring must be reduced. Because the size of each area is reduced, the optical quality of the original and close-range magnifications is reduced. In addition, the edges in each different area can produce undesirable edge effects. This optical degradation offsets the potential for reducing pupil size dependence due to the use of multiple regions. Another type of common vision area lens includes the use of an aspheric lens in the bifocal optical domain, which provides a continuously changing optical magnification gradient in a selected magnification range. The slope of the magnification gradient must be set so that: in the pupil region of the eye, the required difference (ie, the required bifocal additional magnification) is provided between the near magnification 値 and the long magnification 値. Therefore, when designing with concentric regions, the visual performance of the aspheric common lens design is also limited by the same dependency on the pupil size. In addition, between ^ and nearly the full range of numbers, all magnification corrections are provided. The design of the aspheric ball will jeopardize the ‘vision: domain quality’ provided in any-specific magnification. -5- This paper size is in accordance with Chinese National Standard (CNS) A4 specification (21 × 297 mm) (Please read the precautions on the back before filling in this page) Youlian Lianjian Yinjue Distant Products 571142 Intellectual Property Bureau, Ministry of Economic Affairs Printed by employees' consumer cooperatives A7 B7 V. Description of the invention (3) An aspherical lens < example is US Patent No. 5,754,270 (by Dagger et al.). The No. 270 patent discloses a lens having an aspheric first optical region, a second aspheric concentric optical region, and a transition region, which provide a steepness between the first region and the second region. Ratio conversion. The disadvantage of this type of lens is that the user's visual acuity is sacrificed at a specific number of magnifications because it includes a range of magnifications rather than an area with a selected magnification. Still another version of the common vision area lens is based on diffractive vision. This lens provides nearly equal distance and near vision areas, and the dependence on pupil size is relatively small, but the clinical acceptance of diffractive bifocal contact lenses is relatively low. It is not clear that such low acceptance is due to the limitation of its own diffractive optical quality, or due to the complexity of diffractive optical elements that are quite difficult to manufacture. In order to develop a more effective design, we must first understand that the traditional interpretation of the common visual area described above may be misleading. By demonstrating the common visual area from the perspective of close-range and long-range images, the traditional theory assumes that there are two separate retinal images, and the brain recognizes them in some way and processes them separately. At any given moment, when the eye looks at a particular object, it is located at a particular visual distance. In all common vision area lenses, part of the degraded image is projected onto the retina. The result of such image degradation is the loss of visual data (less signal, more noise), and the quality of the degraded image may or may not be acceptable to the patient. The clinical effects of this degradation can be objectively measured with reduced visual acuity and contrast sensitivity. The subjective effect of this degradation can be from the disease-6- This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page) ▼ Packing ------ --Subscribe ---- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 571142 V. Description of Invention (4)%, discovered in different ways, collectively known as subjective ambiguity. Therefore, when wearing a common vision zone lens, the patient cannot choose between separate distant and near images. Instead, when subjective blur appears, the patient tries to make use of the poor quality visual information provided by the degraded image. The salty vision system does filter out some noise, and many patients show excellent potential to accommodate subjective ambiguities. In some patients, the adaptability is not so complete ’it fails to convey any subjective ambiguity, and even through objective measurements, its vision is significantly impaired. However, a negative situation occurred, showing normal visual performance in an objective assessment, but the patient complained paradoxically of poor vision. Therefore, there is a need for an improved common lens design that maximizes the visual information available to gazing at objects at long and short distances while minimizing visual disturbances. SUMMARY OF THE INVENTION The present invention provides an optimized lens structure for reducing visual disturbances caused by transition situations between different regions, while enhancing visual sensitivity within a certain range of distances. For lenses, it is also necessary to combine the substantial advantages of the concentric circle design and the substantial advantages of the aspheric design into a unique overall design, so that each disadvantage is minimized. In short, the present invention provides a lens having a plurality of vision regions. The plurality of areas include a first visual area, a second visual area surrounding the first visual area, and a third visual area surrounding the second visual area. The first visual area has a first magnification, and the second visual area has a range. The paper size is in accordance with the Chinese National Standard (CNS) A4 specification (21 × 297 mm).

— .Ί --------- • 装 ---- ί 清 Both & dagger master 蕙 dream is the real nest buckle page V order ---- 571142 A7 B7 5. Description of the invention (rate. Today The first visual area has a second magnification that is different from the first magnification, and one of the second and third visual areas has a magnification of the H gradient of the non-spherical appearance, while the other areas do not have a sphere. Single-magnification 値 'is designed for non-spherical surfaces to correct optical aberrations in the & early-magnification area. Package also: for a lens with multiple visual areas. Multiple areas of the stomach The second vision area and the third vision area. The second vision area: If vision area is located on the edge of the first vision area and the third vision area, and the third vision area defines a part of the f-face wheel of the lens. However, the direction of the concave surface does not change, although the outline of the magnification can show the adjacent areas of single-magnification 値 and gradient magnification 。. The present invention is also directed to the ophthalmic kit. The ㈣ is included in the antibacterial ㈣ Month's Classic Bacterium Packaging Contact Lens. The kit includes the lens and is protected in a potion bottle or blister pack. v; According to another aspect of the present invention, a method for using contact lenses is provided. According to the first step, the user places the contact lens on the pupil of the user's eyes. The contact lens has a transition area, The first visual area doubled to the second visual area with the second magnification. As used herein, "lenses" is used to broadly interpret lenses that include various deformations, including contact lenses and eyeballs. And "when used in this article, the" magnification "item is used to broadly explain including a single magnification or average magnification. When further used in this article, the" range of magnification "item is used to broadly explain Including a series of _ generally continuous or discontinuous magnification. 丨 ^ ----------- install ---- (Please read the precautions on the back before filling this page) Order ---- Economy Printed by the Consumer Cooperatives of the Ministry of Intellectual Property Bureau -8- 571142

Description of the invention (6 types of lenses have incorrect magnification curves

畐 As used in this article, "F interval or field. The e-field is an item that is used to broadly explain the inclusion of:? Ancient and contemporary '" visual area " This item is used to include contributions to the use of 耆 vision Points: Also: Detailed descriptions related to the drawings below and below can fill the present invention and its accompanying objects and advantages. Brief description of the drawings Figure 1 is a graph according to the present invention ^ ^ A front view of four copies of the light of the contact lens structure of a preferred embodiment of the month I; Figure 2:-a graphic showing a cross-section of a lens of a conventional technology; Figure 3: a graphic showing a preferred embodiment shown in Figure 1 Figure 4: -Figure 'shows that the optical magnification is a chord diameter < function of the preferred embodiment; " Solid' shows that a lens has an incorrect magnification curve wheel. Figure 6 is a graph, 7 shows another outline; FIG. 7 is a front view of an optical lens of a contact lens structure according to another embodiment of the present invention. FIG. 8 is another embodiment of the present invention. A front view of the optical lens of the contact lens structure of the preferred embodiment; Fig. 9 shows a kit constructed according to another preferred embodiment; Fig. 10: Optics 1 of a contact lens constructed according to yet another preferred embodiment, such as, Dagger City ^ ----------- Installation -------- Order --------- (Please read the precautions on the back before filling this page) Employees of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by Consumer Cooperatives-9- 571142 V. Description of the invention (7) Front view of Shao Fen; and Figure 11 is a cross-sectional view of the embodiment of Figure 10. Detailed description of the preferred embodiment and drawings Figure 1 is the invention A front view of the optical part of a preferred embodiment, the part of which is also represented by the graph of Figure 3. Figure i shows the contact lens 10, which has a middle and nearby structure. The central area j 2 is a single magnification area, which Provides the required close-range magnification. The outer region j 6 is a single-magnification region, which provides the required long-range magnification. The middle region 14 is a gradient-magnitude aspheric region, which provides continuous and monotonic magnification changes. 2 close range magnification to long range magnification of region 16. When the central region 2 and the outer region 16 are implemented in this preferred embodiment When the area is a single magnification, please understand that each of these areas can also be formed by multiple areas with multiple magnifications. The dotted circle in the area 16 represents the typical pupil size. The intermediate region 14 is used as a focal length extended depth region. In this way, the intermediate region 14 contributes to the vision of the entire distance range of the object, including long-distance vision, short-distance vision, and intermediate-distance vision. When looking at the close-range position In the case of an object, the central area 12 and the middle area 14 are combined (in one of the examples below, the 3.0 mm pupil is about 70% of the area, or the 35 mm pupil is about 52% of the area), and it is useful for close vision. contribution. When looking at a distant object, the middle area 14 and the outer area i 6 are combined (in one example below, a 3.0 mm pupil is approximately 6 ^% of the area, or a 3.5 mm pupil is approximately 72% of the area) And contribute to long-distance vision. At the middle distance, the middle region 1 4 provides a useful degree of middle distance vision. The 3.0 mm pupil is about 32% of the area, or the 3.5 mm pupil. -10- This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 public love) '571142 A7 B7 V. Description of the invention (8) The hole is about 24% of the area. The dimensions of the three areas must be accurately calculated so that the largest pupil area can be used for both long-distance and short-distance vision, and according to different parameters such as the required magnification, sacral size, eye aberration, and other patients and applications. Related parameters. Therefore, if necessary, each lens must be customized to match the user's special magnification or other unique features. In addition to the user's long-distance and short-distance magnification prescriptions, parameters such as pupil size, additional needs, and personal habits and functions can be considered to produce a custom-designed lens; alas, a lens with optical The area, magnification, and size are clearly selected to suit the needs of a particular user. Or the size of the three areas can be normalized into several options to meet most of the needs of the general use population 'but it is also consistent with the economic scale derived from mass manufacturing. Toric surfaces can also be used for this lens to correct astigmatism. The torus surface will be used for the side opposite to area 12 ,;! 4,16. In the example, 'the diameter of each area and the pupil area percentage of typical pore size are listed as follows: Table 1 (Please read the precautions on the back before filling this page) Order --- ♦ Staff of Intellectual Property Bureau, Ministry of Economic Affairs Consumption cooperative print area diameter magnification 3.0 mm in pupil area% 3.5 mm in pupil area% 4.0 mm in pupil area% 4.5 mm in palate area% 5.0 mm pain in pupil% area 12 186 mm close 38% 28% 22 % 17% 1 4% area 14 2.52 mm 32% 24% 18% '' 4% 1 ^ / 0 12% area 16 8.00 mm distance 29% 48% 60% 69% 75% in most of the preferred embodiments The diameter of each area is the same as the typical -11-571142 A7 B7 V. Description of the invention (9 Table 2 The pupil area percentage percentage of the sacral hole size is as follows: ------ area diameter magnification 3.0 mm pupil area area% 3.5 mm middle pupil area 4.0 mm middle pupil area% 4.5 mm middle pupil area% 5.0 mm middle pupil area% area 12 1.83 mm close 3 7% 27% 21% 17% 13% area 14 2.46 mm gradient 30% 22% 17% 13% 11% area 16 8.00 mm 33% distance 51% 62% 70% 76% w… The maximum range of the heart area i 2 is 1.0 to 3.8 mm, or preferably between L 2 mm and 2 i mm, and most preferably 1.5 mm to 1.9 mm. The intermediate region 14 may have a minimum diameter of 1.2 mm and a maximum diameter of 4.8 mm, and it is better that the inner diameter is between 1 ^ 2 mm and 2 ·; mm, and the outer diameter is 23 mm. And the range of 3 〇. The outer region 16 may have a minimum diameter of 20 mm and a large diameter of 10.111111, and it is better that the inner diameter is between 23111111 and 3 () 11 ^, and the outer diameter is In the range of 4.0 mm and 9.0 mm. The Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs prints the rules of change from the heart (please read the precautions on the back before filling this page) The lens can be quickly designed without any A bifocal additional magnification is needed. In the general clinical experience, the supplementary magnification range of most general prescriptions ranges from 75D to + 2.50D, but the prescription of the additional magnification sometimes exceeds this range. Then the prescription The long-distance magnification and additional magnification can be determined by using standard optical formulas often used by the artist; The radius of curvature of the region 12 and the outer region 16. Then, by using the method detailed below, the number indicated by the aspheric area of the present invention can be determined. Listed in the table below are examples of lens range in the middle and long distance magnification-12 571142 A7 __ B7 V. Description of the invention (10) Grid 'The lens has an additional magnification of +1.50 D and the size of the interval is indicated in the previous text In Table 1-2. In the table, the variables ^, 0, and r3 represent the radius of curvature of the center, middle, and outer regions, the variable p2 represents the asphericity of the central region, and ε 2 and ε 3 are position variables for the middle and outer regions. In the following, when these mathematical expressions of the respective superficial forms are pushed / coupled, all these variables will be explained more fully. It is assumed that the multiple optical regions are located on the front surface of the shaped glasses in these examples, but each example can be calculated by its similar rear surface structure if necessary.

Surface behind the radius: 8.30mm Center thickness: 0.08 mm Refractive index 1.412 Bifocal additional magnification: +1.50 D Table 3 (for the example of Table 1) (Please read the precautions on the back before filling this page) [Equipment — Order i — Printed central area of employee consumer cooperatives of the Intellectual Property Bureau of the Ministry of Economy 12 Aspheric area 14 Outer area 16 Distance magnification 1 * 1 Γ2 P2 ε2 r2 L S3 -5.00 8.953 8.579 -6.5612 -0.0010 9.253 0.0022 -4.00 8.764 8.406 6.0829 -0.0010 9.051 0.0022 -3.00 8.582 8.240 -5.6441 -0.0010 8.857 0.0022 -2.00 8.408 8.080 -5.2409 0.0010 8.672 0.0022 -1.00 8.241 7.926 -4.8697 -0.0010 8.494 0.0022 -13- # This paper size applies to Chinese national standards ( CNS) A4 specifications (210 X 297 mm) 571142 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (11) Table 4 (for the embodiment of Table 2) Middle area 12 Aspherical area 14 Outer area 16 distance magnification ri _ 1 * 2 P2 S2 r2 ε3 -5.00 8.953 8.562 7.1303 -0.0011 9.253 0.0021 -4.00 8.764 8.390 6.6160 -0.0011 9.051 0.0021 -3.00 8.582 8.224 -6.144 2 -0.0011 8.857 0.0021 -2.00 8.408 8.065 5.7106 -0.0010 8.672 0.0021 -1.00 8.241 7.912 -5.3115 -0.0010 8.494 0.0022 The transition between the center area 12 and the middle area 14 and the middle area 14 and the outer area 1 The transition between 6 has a considerable impact on visual acuity, and it has been improved beyond conventional techniques. Figure 2 shows the appearance of the cross-section of a concentric, dual-area, bifocal lens in the conventional technique (the curve is enlarged to make the surface contours appear in the figure). At the intersection of the two concentric regions (point A in Fig. 2), there is a sharp angle on the surface contour, and the surface contour forms a discontinuous local tangent line at the sharp angle. Therefore, when the intersection is approached from both sides of the corner, the local tangent on the surface contour will approach different limits 値. The appearance of this sharp angle will cause poor edge effects to cause diffraction, and also cause prism differences caused by the incidence of non-axial light on either side of the angle. In the bifocal lens of glasses, the prism difference caused by this is called “bifocal jump H”, and the bifocal lens of most glasses is set to a specific setting. CNS) A4 specification (210 X 297 mm) J ----------- install -------- order --------- (Please read the precautions on the back first (Fill in this page again) 571142

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the Invention (12) plan to reduce such visual interference effects. The sharp angle at point A in Fig. 2 can be used to connect the two regions (dashed line B in Fig. 2) with the adjustment line to form a rounded corner. Such a harmonic curve can reduce the discontinuity of the local tangent on the surface contour, and for example, the harmonic curve can be formed by polishing or polishing on the original unharmonized surface. Iron, merely rounding the sharp angle can not completely remove the angle and its effects. As shown in FIG. 2 ', in the first four-domain portion, the surface contour is recessed downward in the figure, but the portion of the curved curve 3 is recessed upward in the figure. Although not continuous on the tangent, the number of slopes sometimes increases and sometimes decreases. The potential for edge effects of perturbations will still appear in such harmonic contours. The transition region of the present invention largely avoids the benefits of these disturbances. Fig. 3 partially shows the embodiment in Fig. I in a cross section. The surface contour of the middle aspheric area 14 is shown in FIG. 3 with a dashed line to distinguish it from the center area 12 and the outer area 16, and the two areas are shown with a solid line. In the preferred embodiment, the intermediate region 14 has an invisible physical boundary on the boundary between the central region 12 or the outer region 16. Therefore, for this particular structure, the profile is smooth, continuous, without sharp or rounded corners, and remains depressed downward. Because the middle region 1-4 located between the central region 12 and the outer region 16 is completely seamless, the absence of sharp borders can cause undesirable edge disturbances, such as the bifocal bounce effect. Each such surface area or section of the present invention is a rotating surface. Because such a surface of each interval can be mathematically taken as a two-dimensional item of its cross-section. -15- This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 public copy) I, ------- ---- Equipment -------- Order --------- (Please read the precautions on the back before filling out this page) Printed by the Employee Consumption Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 571142 A7 B7 5 And invention description (13). The complete surrounding surface can then be produced by rotating the cross section about an axis. In the simplest form of the invention, the rotation axis is also the optical axis of the contact lens, and the geometric center of the contact lens is located on the axis. However, it is also suitable to deviate the optical area of the contact lens from the geometric center of the contact lens, so that a more favorable optical positioning with respect to the eye can be achieved. For example, if the average position of the contact lens is not positioned at the center of the eye, it needs to deviate from the optical area, so that the optical area can be positioned about the eye, not about the contact lens being centered. Furthermore, I understand that the eye itself is not a centrally located system. Therefore, the pupil is usually not located at the center of the visible iridescence, and the visual axis of the eye is not usually located at the center of the pupil. All these differences in the degree of alignment can be compensated by deviating from the optical properties of the contact lens, so that the final position of the optical region is positioned at the center of the pupil or child's visual axis. To maintain such a good degree of alignment of the optical area with respect to the eye, the eye must also include an adaptation system to stabilize the lens, such as is normally visible in a ring contact lens. For example, a prism stabilization system can be used to hold the contact lens in the correct position of the eye. However, when the geometric center of the lens is on the optical axis, no such stabilization system is needed. The cross-sectional surface profile of a rotating aspheric surface is usually described in terms of a conical portion. If the cross-section of the convoluted surface is not a regular conical shape, any small range of the surface contour can still be closely approached by a conical portion. A form of the cone-shaped equation is shown in the formula (), where r -16- this paper size Chinese National Standard (CNS) A4 specification (210 X 297 mm)

It L I -------- install -------- order --------- (Please read the precautions on the back before filling this page) 571142 ⑴ ⑴ ⑺ ⑺ Formula ⑷ A7 B7 V. Explanation of the invention (14) is the radius of curvature at the vertex of the surface (the vertex radius), y is the distance between the point on the surface and the axis of the conical shape, and X is the surface The distance between the point and the vertex in the axis direction. In contact lens terminology, the distance X is often referred to as arrow distance or arrow depth (sagittal distance or sagittal depth), and 2 y is the chord diameter of the arrow distance x (y is the half chord diameter). Equation (1) is quite convenient because it can be used to describe spherical and aspherical surfaces. y2 = 2rx-px2 p = l ^ 2 for gradually flat surfaces p = 1 / (1-e2) for gradually steep surfaces p = 1 + k or k = p- l ft: the number p is within a few Is used to describe the asphericity of the surface, and the relation with the commonly used eccentricity e of the conical part is formula (2) or formula (3). When a point on the surface is far from the vertex position, if the curvature of the surface becomes flatter, then formula (2) is used, and when a point on the surface is far from the vertex position, if the curvature of the surface becomes more flat If steep, use equation (3). The correlation variable k = p-1 in equation (4) is also quite suitable as an aspheric degree variable. The relationship between these aspheric variables and the general type of rotating surface is summarized in the table below. -17 This paper size applies to China National Standard (CNS) A4 specifications (210 X 297 Public Love_ l, t L · -1 -------- t -------- Order ---- ----- (Please read the precautions on the back before filling out this page) Printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 571142 A7 B7 V. Description of the invention (15) Table 5 The surface magnification P ek of the conical part is flat Circular spherical surface P = 1 e = 0 k / 2 0 Elliptic parabolic hyperbolic circular surface 0 < ρ < 1 0 < e < l -l < k < 0 Parabolic surface p = 0 e = lk 二 _1 Hyperbolic surface p < 0 l < e k < -1 Steep sugar circle elliptic surface-1_ 1 < ρ 0 < e < l 0 < k ～ 田 w Hard to the aspheric variable p, Equation (2) can be used to describe spherical and aspherical surfaces (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs

Since the present invention provides a contact lens having multiple regions, Equation (5) can be derived from Equation (5), where the index i is used to represent the equation to describe the first surface region. Therefore, 1 = 1 means that the first surface area is smaller than 2 means a side surface area, and so on. y2-2r {X-Pi χ2; i = i 2 3, ^ "2,3, ··· Eq. (5) Eq. (5) The surface shown in Eq. (5) is located at the coordinate The origin of the system. In order to allow the apex of the ^^ T prj valley not to be all located at this point, equation (5) must be further generalized to "(6), where £ {and ^ represent children's surfaces X and y coordinates of the vertex. (y V \)-2 Γ | (χ-(^ x. e The reversal relation of formula (6) is the formula Γ (6) The expression of the first degree of ice is easy to form, the front is the front; the side (bull) string Function of diameter. (Χ_Α) 1 + Eq. (7) Install -------- order ---- contention. Scale _ lobes (⑽) 18- 571142

The surface I of the present invention is not limited to these aspheric surfaces and formula surfaces derived from the conical portion to fit differently from the conical surface. One step is generalized, and the higher order term is included as Equation (8). Bao Benyan 1 = The entry can be used to minimize some optical aberrations or eliminate 4 higher-order (x1) (y- " /) 2. The consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs has printed it to simplify mathematical operations. These higher-order terms are not included in the following +, although they can be incorporated into another embodiment of the invention if desired. = It is clear that formula (7) is used instead of formula (8) in the following derivation. In a preferred embodiment of the present invention, the front end of the contact lens and the multi-focus optical section include three sections. Although each zone has its own characteristics and requirements, the surface with three intervals can be simply explained by the following equation derived from equation (6). (y- ”1) = 2ri (X- ε 〇% (χ_ ε when & ^ & 〇 (y-” 2) = 2r2 (x- ε2) -p2 (x_ ε2) 2, when $ Zι ( yh) = 2r3 (x- ε3) -ρ3 (x_ ει) 2, square; in these equations, Zi is the chord diameter of the first interval in the center, and the chord diameter (outer diameter) of the second interval, and the center is the third The chord of the interval is straight. Therefore, the surface contours of the two intervals can use the above equations to specify the undernumbers L Pi, ε i, ^ 7 i, and Zi and i = 1, 2, or 3, specifying a specific 値It can be fully defined. The unique features of the present invention can now be explained in terms of its physical and mathematical requirements. These requirements are then used to derive the variables qh, ^, and (9), (10), (11) B 2 is the number

Vi IY II -------- install -------- order --------- (Please read the phonetic on the back? Matters before filling out this page} -19. Ϋϋ Standard (CNS) A4 specifications x 297 public " iy printed by the Consumers' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 571142 A7 ____ B7 V. Description of the invention (17) and Zi number, detailing the preferred embodiment of the present invention. The starting point of the specification of the preferred embodiment lies in the selection of the sizes of the zones Zm, 22, and Z3. The maximum zone Z3 is similar to the traditional optical zone size in a single vision lens. Therefore, its design is more than the average pupil of the eye The diameter is much larger. Therefore, the typical number of Z3 is 8.0 mm. This is a fairly large range size, but it is usually not less than perhaps 60 mm or 6. 5 mm. Also, although the theoretical upper limit for Z3 Is the full diameter of the lens, but & is usually smaller than the diameter of the lens in order to prevent the center or peripheral area of the lens from becoming too thick or too thin. Therefore, in the preferred embodiment, it is used for many low to medium 4 of the range magnification is set to 8.0mm, but for a higher positive magnification or a higher negative magnification In general, a larger or smaller number of 4 is also acceptable or necessary. In the preferred embodiment, the central area i 0 is a single magnification interval, and it is designed to provide close vision Magnification: In the conventional technology, the center section of the lens contains a close range magnification, and the Z1 size is selected so that the area of the center close range is equal to the average pupil diameter of 30 mm to 32 mm, which is roughly equal to the glasses 50% of the pupil area of the eye. For example, Z! Is equal to 2.1 mm in the central interval, the central area provided is about 50% of the 3.0 mm pupil area. The principle of this choice is that the pupil of the eye represents the use of The degree of compromise, and the best balance of long-distance and near-distance vision requirements, must make each magnification area approximately equal to 50% of the pupil area. However, this principle is not based on the complete visual needs of average hyperopia Analysis. An improved multifocal lens not only provides excellent long-distance and -20-^^ scales applicable to Chinese national standards (CNS ^ h each (210 x 297 mm) ------ I fl · I.- ---- --Crack -------- Order --------- (Please read the notes on the back before filling out this page) Printed by the Intellectual Property Bureau Employee Consumer Cooperative of the Ministry of Economy 571142 A7 __ B7 V. Description of the invention (18) The short-distance visual quality, and the vision providing the intermediate field of view distance. Therefore, one object of the present invention is to provide at least three optical interval areas for providing long-distance magnification, short-distance magnification, and for middle-distance vision In order to incorporate such three intervals with progressive magnification, and the magnification occupies a considerable area of the pupil, resulting in a natural geometric result, the center near magnification interval must now limit the size, the pupil it occupies The area is generally less than 50%. In addition to the geometrical meaning of at least three optical interval areas programmed into the pupil area, another object of the present invention is to provide an optimized interval area structure that allows ordinary users to meet their visual needs within the maximum range of daily activities. . To achieve this, the size of the center close range must be large enough to provide comfortable reading vision. However, if the center's close range is too large, close vision can be improved, but at the cost of reducing the quality of long range vision and intermediate range vision, the compromised range is not acceptable. Therefore, in order to achieve the full range of magnification requirements, when the area of the center close range is substantially less than 500/5, it is found that the user's visual requirements can be best satisfied. In a preferred embodiment, the size of Zi = 1.86 mm is used for its central close distance interval 12, which is about 38% of the pupil diameter of 3.00 mm. For larger pupil diameters, this same central close distance interval 2 represents a smaller part of the pupil area. For example, the size of the central short-distance interval 12 of Zl == 1.86 mm, which represents approximately 38% of the pupil area of 300 mm, and only approximately 28% of the pupil area of 3.50 mm. The ring-shaped second interval i 4 is a gradient magnification interval, which provides an intermediate distance of -21-This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) I ---------- --Installation -------- Order --------- (Please read the precautions on the back before filling this page) 571142 A7 B7 V. Description of the invention (19) (Please read the back Note to fill out this page again). The outer diameter Z2 must be selected to provide an optical area effective for the gradient magnification in the pupil, while still maintaining the long-range visual quality provided by the outermost third optical region or section. For the first and third intervals, the designation of the variables ri, Pi, ^, and W is relatively straightforward, because the area is a single magnification, and it is designed to provide the requirements of long-range and short-range optical magnification. In the preferred embodiment, these single magnification intervals may be spherical, or they may be aspherical to facilitate correction of optical aberrations, such as the spherical aberration of the contact lens or the eye. Because the size of the interval can be selected to fit into the eye hole of the eye, the relative spherical aberration of the single magnification interval is relatively small. Therefore, for a pupil size smaller than 3.6 mm, the spherical aberration is substantially less than about 0.25 D in the corresponding area of the contact lens. Therefore, the adjustment of the aspheric surface required to correct this aberration privacy is also small. The spherical aberration of this eye varies from person to person, but for pupils smaller than 3.6 mm, it is usually no greater than about 0.50 D. This requires slightly larger aspheric adjustments, but is still relatively small compared to the adjustments required for the multifocal magnification range of this contact lens. Printed by the Consumers 'Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The following mathematical derivation' assumes that the single magnification interval is spherical, which means that it is aspheric. You can simply specify Pi = ps = 1. Moreover, the curvature spherical radii ri and ο in these intervals are determined by the prescription of the distance and the near magnification of the lens. Further, the center of curvature of the two spherical sections defines the optical axis of the lens. By defining the vertices of these spherical sections on the optical axis; 77 ^ 773 = 0 can be obtained. The positions of the vertices of the first and third surfaces along the optical axis are ε 丨 and -22, respectively. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm). The Consumer Property Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed 571142 Α7 ___ Β7 Fifth, the description of the invention (20) ε 3 refers to the foot. The origin of the traditional coordinate system is placed on the vertex of the surface of the central section without losing its general rules, so ε ι = 〇. The vertex position of the second surface can then be determined only by the number ε 3. The position of the vertex can also be determined, ^, which is the distance between the centers of curvature of the first and third surfaces, and can be specified by equation (1 2). r 13 = (ri + ε3) · (Γι + ει) = (r3 + ε3) -Γι Formula (12) In the absence of the second annular interval, the first and third spherical surfaces having a center distance r 13 It will intersect on an imaginary interval boundary, and the diameter Z13 is specified by equation (13). z13 = 2rxsma and cosa = — ~~-~ Formula (1 3) 2rnh ε 3 and the resulting r n must be selected so that z13 satisfies the following formula (1 4). The imaginary intersection boundary of the first and third surfaces must be located within the surface of the second interval (and can be replaced). Otherwise, the boundary where the first and third surfaces intersect will exceed the second interval, and an extra interval may be inadvertently created. ^ Zi3 ^ z2 Formula (14) First find that Formula (1 4) allows the degree of the range of ε 3 to be selected, so that 値 of r 13 has a corresponding range of change. However, the expected characteristics of the magnification gradient in the second interval 14 can also be known from the following, providing ε 3-an additional and important mandatory, which is not a multifocal lens in the prior art Appears. Now deriving the numbers of r2, p2, ε2, and ^ 2, we can complete the -23-This paper size applies the Chinese national standard (CNaA4 specification GW X 297 public love) -ltu! ------- install -------- Order --------- (Please read the precautions on the back before filling this page) 571142 A7 B7 V. Description of the invention (21) (Please read the precautions on the back before (Fill in this page) Specifications of the aspheric surface in the second interval. An indispensable feature of the present invention is that the tangent to the surface of the lens is continuous at all points, especially at the boundaries between different regions or intervals. Most of the tangent to the surface profile on the i-th interval is usually described by a first derivative function y. The following formula (1 5) is calculated from the formula (6). Formula (15) Formula (1 5) can also be combined with formula (7) obtained by reversing the relationship to obtain formula (1 6). This equation is more suitable because it provides a mathematical formula for directly calculating the tangent line and does not need to know the depth of the arrow clearly. Equation (16) 1 + Sm-Now we must apply the continuity requirements of y and y, in order to solve the variables 0, P2, ε 2 and 7; 2. These variables detail the aspheric surface of the second interval. For convenience, the quantities X1, yi, y〆 and X3, y3, y3 will be defined below. On the boundary between the first and second intervals, the formula (17) is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs to specify the half-chord radius. Then define X 1, yi, yT 0 y = Z " 2 between the first and second intervals by formula (1 8) to formula (2 0), and let yi = Zi / 2 formula ( 18) Χι = X When y = y! Formula (19) yi 丨 = y · When y = yi Formula (20) -24- This paper size applies the Chinese National Standard (CNS) A4 (210 X 297 mm) 571142 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 _______B7 _ _ V. Description of the Invention (22) Similarly, on the boundary between the second and third intervals, formula (2 1) specifies the half-chord radius, and X3, y3, y3 丨 are defined by equations (22) to (24). y = ZV2 boundary equation between the second and third interval (2 1) Let y3 = Z2 / 2 Equation (22) x3 = X when y = y3 Equation (23) y3 '= y, when y = y3 Equation (24) For the above-mentioned quantities Xi 'y, x3, y3, and y3', the continuity characteristics of the present invention can be simply summarized into four conditions or equations. Equations (25) and (26) can be obtained from equation (6), and equations (27) and (28 卜 (Y \ -V2) 2 = 2 r2 (χι-ε2)- ρ2 (χι. ε2) 2 Formula (25) (y3-”2) 2 = 2 r2 (χ3-ε2)-ρ2 (χ3_ ε2) 2 Formula (2 6) (yi_h) yi 丨 = r2-p2 (Xl- ε2) Equation (27) (Υ3- V2) ys' = r2_p2 (x3_e2) Equation (28) These equations (25) to (28) represent the system of four unknown equations, p2, ε2, and four nonlinear equations Because the equations of this system are non-linear, for convenience, the steps are reverted and equation (6) is rewritten so that the second surface is expressed as a general quadratic mathematical equation (29).

Ax2 + By2 + Cxy + Dx + Ey = l Equation (29) Equation (2 9) can be simplified slightly by omitting the cross-multiplication term Cxy. In the general case, this omission can be achieved by proper rotation of the coordinate system, but due to the symmetry of the rotating surface of the present invention, it can be assumed that the proper coordinate rotation has been completed, and therefore C = 0. Therefore, the Chinese National Standard (CNS) A4 specification (210 X 297 public love) applies to this paper size -25-

If l · ---------------- ^ --------- (Please read the notes on the back before filling out this page) 571142 A7 B7 V. Description of the invention ( 23) An alternative but similar mathematical formula on the two surfaces is shown as formula (30), and formula (31) indicates the corresponding relationship formula of the tangent line.

Ax2 + By2 + Dx + Ey = l Formula (3〇) 2Ax + 2Byy '+ D + Ey, = 0 Formula (31) The formulas (2 5) to (2 8) obtained from the continuity demand are similar to the following Four equations. Α χγ2 + B yi2 + DX! + Ε yi = 1 Formula (32) A χ32 + Β y32 + Dx3 + Ey3 = l Formula (33) 2Axi + 2Byiy1, + D + Ey1f = 0 Formula (34) 2 A x3 + 2 B y3 y3 '+ D + E = 0 Equation (3 5) Equations (32) to (35) are a system of four equations of four unknowns A, B, D, and E. However, the biggest advantage of this formula compared with formulas (2 5) to (2 8) is that it is now a linear equation system of four unknowns, which is easy to be solved by standard methods. In particular, the solution of this system can be obtained directly by using Cramer ’s Rule method and appropriate 4x4 determinant. Therefore, let Q denote the determinant, which is defined as follows (3 6). — Tl ·! ------- Equipment -------- Order --------- (Please read the precautions on the back before filling out this page) Staff Consumption of Intellectual Property Bureau, Ministry of Economic Affairs Printed by a cooperative

Q

Yi yiy \ ^ 3 ys 2x1 2yxy {1 2x3 2 less 3 less 3 丨 1 less 3 丨

X

Formula X (36) Then by applying Cramer's Rule (and if the above determinant Q is not), the four unknowns A, B, D and E can be specified as the following formulas (37) to -26- This paper scale Applicable to China National Standard (CNS) A4 specification (210 X 297 mm) 571142 A7 B7 V. Description of invention (Form 24) (40) Printed by A-Q'1 · B = Q-1 · D = Q_i · E ^ Q · 1 · 1 y? Χγ Ά 1 y \ χ3 0 2 劾 丨 1 3V 0 1 X? 1 χι yi χ3 1 x3 less 3 2χλ 0 1 pills 2χ3 0 1 less 3 'χι2 y ? 1 x? Yl 1 ys 2χι ^ y \ y \ 0 2χ3 0 less 3 'x? Y? ^ 1 1 χ3 y \ 1 2χι 2can 丨 1 0 2χ3 2 little still 丨 1 0 formula (37 formula (38) Equation (39) Equation (40) I tl · -------- install -------- order --------- (Please read the precautions on the back before filling this page ) -27- This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) 571142 V. Description of the invention (25) When the items in formula (6) are expanded, $, χ2, y Compared with the corresponding coefficients in formula (3 0), and and /, we can finally get r, P2 2 And the relationship of the required h

η P2-- B type (41) € ε2

• ---- · B2 2r2B + DA

-2A formula (42) formula (43) V2

JE_ ^ 2B Formula (44) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs The apex position of the third section specified by 4 only meets the general requirements specified by formula (i 4). However, it is an object of the present invention to provide the aspherical section with a useful optical section in which the gradient magnification is only square; the direction changes monotonically. Such a magnification profile is shown in FIG. 4. For the preferred embodiment of the present invention illustrated in FIG. 4, the optical magnification is a function of the salt string diameter 2y. In the first interval of the center, the optical magnification is substantially constant, that is, the near magnification 倍. In the surrounding third interval, the optical magnification is substantially constant, that is, the long-distance magnification 値. In the second interval, the optical magnification changes monotonously and continuously, from the short distance 値 to the long distance 値. In order to make the contour of the expected pattern in the second interval, a sufficient condition is to make 7; 2 = 0. Therefore, the preferred embodiment of the present invention requires 7; 2 = 0. -28- The size of this paper applies to Chinese National Standard (CNS) A4 (210 X 297 mm) I ί III —I — ------ II Order --- I --- I— (Please read the back first Please pay attention to this page and fill in this page again) 571142 A7 Formula (45) Formula (46) Formula (47) V. Description of the invention (26) From Formula (44), we know that when E = 〇 时 心 = 〇. By expanding the determinant in the formula (44), it is shown that when the relationship of the following formula (45) is satisfied, the heart = E = (). (Xl_x3) = — (yi-%) y3f In fact, Equation (45) is intended to limit μ. Equation (46) is an identity that can be rearranged into the pattern specified by equation (47). The item in equation (47) can then be calculated using equations (4 5) and (7). As a result, the condition for the third surface (whether it assumes ε 丨 = 0) ε 3 is to combine τ with the requirement of continuity; 2 = 0, and also to ensure that the magnification profile of the aspheric interval will have that shown in Figure 4. Monotonically progressive predetermined characteristics. (χι-ε ι)-(χ3-ε 3) = (Xi-χ3)-(ε!-ε 3) (ε1-ε3) = (χι-χ3)-(χι-ε ι) + (χ3-ε 3) I find that the surface is astonishingly small and deviates from the preferred embodiment, which will result in a poor photon effect. Due to such a small physical deviation from the horse, the preferred embodiment 'will cause considerable optical effects, such as poor runout or pits on the magnification rim, and the manufacturing process must be highly controlled so that the required surface The contour is made correctly. In the conventional technology, the manufacturing of the aspheric surface is performed by polishing or tempering processing, which cannot be controlled sufficiently to analyze and explain the final surface profile. Such a low degree of control cannot reliably meet the specifications of the predetermined magnification contour shown in FIG. 4, and it is therefore very likely that the magnification profile obtained by polishing or tempering is shown in FIGS. 5 and 6. Has a poor effect. The contact lens 10 will comply with the following conditions, and the resulting lens will be -29- This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) — rl ·! ------- Install -------- Order --------- (Please read the note on the back? Matters before filling out this page) Employee Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs printed the employees of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Consumer Cooperative 571142 A7 · B7 V. Description of the invention (27) It has the advantages of both spherical and aspherical lenses. 1 · When the surface profile of the contact lens 10 is shown in a cross section (Figure 3), the intersection between the middle region 14 and the center region 12 and the outer region 16 is smooth, continuous, and not sharp Angle. When any point on the surface contour approaches the intersection from both sides, the tangent of the curve at that point will approach the same value at the parent cross-point of the far-pass. Mathematically, that is, the first derivative function of the cross section (dy / dx or y ') is continuous%' and especially the crossover between the regions, the first derivative function is continuous. In the Cartesian coordinate system and the notation previously used, the requirements for the continuity of the first-order derivative function y 'on the boundary between the central region 12 and the intermediate region 14 are summarized as follows. lim yf = yi 'is from below y—Z " 2 lim y' = yi · is from above y — Z " 2, and y '= yi' is at y = Z " 2 That is, the first-order derivative function y 'on The boundary between the central region 12 and the intermediate region 14 has separate and unique values, and when y approaches from both sides of the boundary between the intervals Z " 2, the first-order derivative function y, tends to Nearly this single value ...,. · Similarly, the first-order derivative function y 'has a single and unique value ys, on the boundary between the intermediate region i 4 and the external region 16. lim y '= y3' from the bottom y — Z2 / 2 lim y '= y3' from the top y — Z2 / 2 and y, = y3 'at y = Z2 / 2 -30- This paper scale applies Chinese national standards (CNS) A4 size (210 x 297 mm) 丨! · ---------------- Order --------- (Please read the precautions on the back before filling this page) W1142

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 2. When Tian observes the cross section of the surface profile of the contact lens i 0, he generates a light to the area, which is either convex or concave. There will be no sign change in the direction of the depression in the local area. Mathematically, Lv 'represents that there is no inflection point on the surface, because the second derivative of the surface profile does not change the sign. Similarly, it represents the first derivative or tangent of the edge on the surface contour, and changes monotonically at any point moving through the area. The surface profile has no sharp corners and even no rounded corners. The surface profile is smooth and does not contain "jumps, or" waves "containing sharp or rounded corners. 3. The aspheric intermediate region 14 is a region of gradient magnification, where the magnification is continuous and monotonic from the center. The magnification of area 12 is changed to the magnification of 16 of the outer area. The correct shape of the aspheric surface must be explicitly calculated to provide such a required magnification profile, because a very small deviation from the required shape will cause a bad magnification profile 5 and ό. By providing such a continuous and monotonically changing magnification profile, the intermediate aspheric area 14 provides an optical area that extends the depth of focus and also provides useful vision for intermediate vision distances In order to comply with the above three conditions, the size of the interval must be calculated so that the distance, near, and intermediate distance vision can maximize the use of the pupil area. In the process, all the above three conditions are based on this It must be satisfied in the invention. If all the conditions can not be met, it may cause visual disturbance, which is usually interrupted in the lenses of the conventional technology. Among them, these visual disturbances may be caused by edge effects on the boundary of the composition area, and will also be -31-This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) IΓ. -------- Order --------- (Please read the precautions on the back before filling out this page) 5. Description of the invention (29), because there are no good features and controls on the aspheric surface Caused by the appearance of the inappropriate magnification profile. Unlike the traditional concentric interval design, in the single-magnification area of the present invention with a gradient magnification area, whether the object ft is far, near or middle distance = viewing 'Θ The overall lens can take advantage of the larger pupil surface at any time to maximize the visual information, which is useful for objects at any viewing distance. The dependence of the pupil size can be reduced because it is used at any time. Most of the pupils. This can be done without introducing poor edges or bifocal jumping effects at the borders of the area, because when "the structure is correct", the middle is between the single-magnification. Area 4 provides a seamless transition. Another embodiment of the present invention is shown in FIG. 7. The lens is similar to the preferred embodiment of FIG. 丨 except that the diameter structure of the three regions provides a comparatively close optical magnification. Large area of the perforated area. The intermediate area 24 still needs to be calculated to meet all the conditions listed in the foregoing of the present invention. Table 6 Area diameter magnification 3.0 mm Area of pupil% 3.5 mm Area of pupil% 4.0 mm Area of pupil 4.5 mm Middle pupil area 5.0 mm Middle pupil area% Area 2.0 2.07 mm Close range 48% 35% 27% 21% 17% Area 24 2.71 mm Gradient 34% 25% 19% 15% 12% Area 26 7.50 mm Far 18% 40% 54% 64% 71% According to the structure in the above table, it shows that for smaller pupil diameters, Gong-32- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 571142 A7 --------- B7__ 5. Description of the invention (30) The ratio of the pupil area dedicated to the close magnification is about 50% of that of the conventional technology lens. However, it has been found that this structure does not provide the best visual performance for the full range of distances, middles, and short distances for the average user. A useful clinical evaluation must include not only objective measurements such as visual acuity provided by a visual acuity assessment, but also subjective evaluations of visual cues provided by the patient. The preferred embodiment shown in Fig. 1 has improved performance compared to the embodiment of Fig. 7 with improved performance. This result is consistent with the previously found that the central area with close magnification should be less than 50% of the pupil area in order to provide a result of the full range of vision distance. 0 Another embodiment of the present invention is shown in FIG. 8. The contact lens shows an embodiment of a distant center. In the preferred embodiment, the central area 32 is a single magnification area, which provides the predetermined long range magnification. The outer area 36 is a single magnification area, which provides the close magnification. The middle region 34 is a gradient magnification aspheric region, which provides a continuous magnification transition from the central region 32 to the outer region 36. In the embodiment of FIG. 8, the diameters of the different magnification regions are the same as those shown in FIG. 7, but the order of the long-distance and short-distance magnifications is reversed.丨 " -------- Equipment -------- Order --------- (Please read the precautions on the back before filling out this page) Staff Consumption of Intellectual Property Bureau, Ministry of Economic Affairs Cooperative seal f -33- This paper size is applicable to Chinese National Standard (CNS) A4 (210 X 297 mm) 571142 A7 V. Description of the invention (31 Table 7 Area diameter magnification 3.0 mm 3.5 mm Middle pupil area in the pupil% Area% Area 3 2 2.07 mm 48% distance 3 5% Area 3 4 2.71 mm Gradient 34% 25% Area 36 7.50 mm Close 18% 40%

Among them, again for convenience, the front surface structure is assumed. The surface behind the radius: the central thickness: the refractive index: the bifocal additional magnification:

8.30 mm 0.08 mm 1.412 + 1.50 D Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy Table 8

The magnification area of the present invention can be placed in any appropriate soft health ------- order --------- (please read the note on the back first) ? Please fill out this page again} -34- This paper size applies the Chinese National Standard (CNS) A4 specification (21〇χ 297 mm) 571142 Α7 Β7 V. Description of the invention (32) The front or rear surface of the soft contact lens This material is biocompatible with the eye and can support the good optical quality of the surface. These soft materials include water containing polymers or copolymers, but are not limited to this, they are roughly divided into hydrogels and silicon Ketone elastomers have very little water and water containing silicone polymers. For example, some suitable hydrogel materials are the polymerization of hydroxyethylmethylmethacrylate, ethoxyethylmethacrylate, diacetonepropionamine, glyceryl methacrylate, methyl methacrylate The present invention can also be placed on the front or back surface of a rigid contact lens, such as polymethylpropionate methyl vinegar, different lithone polymer, and fluoroacrylic polymer The lens of the present invention It can be manufactured by turning or molding technology. If the turning equipment is capable of cutting general surfaces by turning, it includes spherical and aspherical contours. A lathe with this capability is often called a two-axis or X-gamma lathe 'because The position of the cutting tool can be controlled digitally in two independent and orthogonal directions. In the aforementioned coordinate system, the two orthogonal directions are along the X-axis (the direction of the arrow distance) and the y- Axis (direction of the chord radius). The other lathe controls the movement of the cutting tool by the scale of the cam follower. When the cam follower draws a & wheel or template as the parent, the aspheric surface can be manufactured. However, this method first requires a method to generate a cam for a predetermined aspherical surface as a parent body; therefore, this turning does not have the elasticity to mechanically make a general aspherical surface. The turning equipment must also provide some To a certain degree of accuracy and correctness, its -35- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (please first Read the notes on the back and fill in this page) ί 装 ---------------- # Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs:) / 丄 丄 碎 Z Α7

Sufficient to ensure that the invention is specified. It was explained earlier that deviation from this optimum will cause a poor magnification profile, and the tiny magnitude of the order of lg micrometers provides the degree of control required for this kind of fineness, X: 2 graphs /: 6. Can be accurate, ί =: cutting method ’because it combines all the advantages of elasticity, precision, and correctness. The best method invented by T State is by molding technology. This method is correct for the parent part 'which must then be correctly reproduced into the finished product part. The base part is usually manufactured by a very precise χ_γ lathe machine with appropriate durability. The advantage of this method is that the intention to correctly manufacture the aspheric surface of the present invention can be achieved by focusing on manufacturing a very high-quality metal matrix. : In the method called mold making, the metal matrix is not directly used to mold Sun contact lenses. Instead, during the two-step molding process, the metal matrix is made of polypropylene or some other suitable hard polymer material, and #thousands of plastic matrixes are molded by injection molding. The plastic parts are usually cast only once to discard the final contact lens. The contact lens is then hydrated to its final form in a physiological saline solution. For this type of mold manufacturing process, the design of the appropriate metal matrix requires the following steps: 1. The degree of shrinkage of the injection molded plastic part must be determined. Polypropylene is used in the process to make an example of the present invention, wherein the reduced privacy is about 1-5% ′ determined by the grade of polypropylene used, the conditions of the injection molding process, and other parameters. -36- This paper size is in accordance with China National Standard (CNS) A4 (210 X 297 mm) -I .-- I ------- I Loading --- (Please read the precautions on the back before filling (This page) Yin Meng, an employee consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs-n 571142 Printed by A7 B7, an employee consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (34) 2. It must be determined that the selected contact lens polymer material is caused by hydration Degree of expansion. In this process, the degree of swelling of the polymer material was found to be approximately 3-11%, which was determined by the composition of the polymer. 3. In the original processing, the 居 -to-parent system is manufactured using a Moore (Bridgeport, CT) aspheric maker lathe to achieve the final required geometry. The metal part is then used to injection mold a plastic part of polypropylene, which is used to mold the final contact lens. The contact lens 10 can also be produced by a process called wet mold making. Low molecular weight diluents can be added to the cast hydrated hydroxyethyl methacrylate HEMA mixture, which is expelled during hydration and provides volume control during hydration. In the ideal Chinese style pigeon moulding, it has zero expansion. In many cases, however, a relatively small amount of diluent is added, which causes some swelling during the hydration process. Mirrors can be manufactured using a range of diluent concentrations, and are successfully completed in each case. The range of diluent concentration results in a corresponding range of solids content in the raw monomer mixture. In the processing of the present invention, high solids content was found to provide better lens performance compared to low solids content. However, the low solids content has certain advantages, such as "(" The low solids monomer contains more diluent, and it costs less during polymerization and hydration than the high solids content; (2) for The size of the metal matrix of the low solid content is therefore closer to the size of the final contact lens because the expansion coefficient is smaller than the expansion coefficient of the south solid content; (3) The yield of the low solid content is higher because when it expands itself When the coefficient is low, it has -37- in the process of polymer expansion. This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm). Ί--L · .------ Aw- I- -(Please read the notes on the back before filling this page) > aj. 571142 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (35) Fewer variables. Therefore, if low solid content can Implementation, so that it can be correctly completed like this high solid content, and it is better. A wet ultraviolet absorbing HEMA polymer with a diluent concentration of about 33% was selected as the preferred material, similar to the US patent Number 4, The materials described in 028,295; 5,637,726; 5,866,635 and 5,729,322 are incorporated herein by reference. The present invention can also be sold in kit 40. The kit 40 can include a contact lens 4 aseptically packaged in a bacteriostatic or sterile solvent 2. Its structure according to the present invention. The lens 42 can also be protected in a potion bottle or blister pack, and includes a storage case 4 4. The kit 40 can also include at least one cleaning solution 4 6 or disinfecting solution 4 8 The cleaning solution 46 may include a conventional cleaning solution. Similarly, the disinfection solution 48 may include a conventional disinfectant. The kit 40 may also include a conventional wetting solution 50. The present invention may also be used for a durable , Often replaced, daily discarded contact lenses. The present invention can also implement orders to make (to-order MTO) contact lenses. The contact lenses thus made to order include any of the following combinations: spherical or toroidal , Colored, printed, UV-resistant material turning, casting, injection molding, or molding on the basic curve and turning on the optical multifocal surface, as in the United States It is described in No. 5,110,278, the disclosure of which is incorporated herein as a reference to this toric case. The present invention can also implement colored multifocal or colored toric multifocal, as in US Patent No. 4,976,533 (Knapp), 4,582,402 (Knapp), 4,704,017 (Knapp), 5,414,477 (Jahnke), and 4,668,240 (Loshaek), and U.S. Patent Nos. 5,034,166 (Rawlings), 5,116,112 (Rawlings), -38- This paper is applicable to China National Standard (CNS) A4 Specification (210 X 297 mm) I fl · ------- I Packing -------- Order -------- (Please read the note on the back first (Fill in this page again) 571142 A7 B7

V. Description of the invention (36) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs and No. 5,302,978 (Evans), the description of which is incorporated herein as a reference to this torus case. More specifically, the present invention may include an area adjacent to the user's iridescent, which includes a pile of darkness that substantially absorbs light, as disclosed in U.S. Patent No. 5,302,978, the description of which is incorporated herein by reference. In addition, 'colored lens patterns, visual printing and mixing of ink and binding agent can be used in the lens of the present invention, as the serial number proposed under the names of M. Quinn and B. Atkins on April 23, 19 It is generally disclosed in 09 / 298,141, and its specification is incorporated herein by reference. For example, a pad printing process can be used that uses a resilient pad pressed against the surface of the lens to place the pattern. The ink includes a dye, an adhesion-enhancing agent, and a catalytic solution. Also, as of July 21, 1998

A UV-resistant material disclosed in the serial number 09 / 121,071 proposed in the name of Hermann Faubl can also be implemented in the present invention, and the description is incorporated herein by reference. According to U.S. Patent Nos. 4,976,533, 4,582,402, or 4,704,017, the 'colorant' will be added to the lens which is hydrated, and then it will undergo a printing and curing process and then be rehydrated. The present invention can also be used for the invention of related toric lenses, which are shown in U.S. Patent Nos. 5,020,898, 5,062,701, and 4,976,533, the descriptions of which are incorporated herein by reference. Regardless of whether the patient is hyperopia, it is desirable to provide the best optical correction for the patient's refractive error. Therefore, if a refraction error is provided to a hyperopic patient with a comparable astigmatism component, it is necessary to use the present invention with a toric contact lens. This combination will correct the patient's complete refraction error, and will also compensate for the close focus magnification caused by hyperopia = ---- Γ .------ • -install i — (Please read the note on the back? Matters before (Fill this page) Order: -39- 571142 A7 V. Description of the invention (37) -------- Install --- (Please read the precautions on the back before filling this page) Lost. In most of the toroidal contact lenses, the ring-shaped surface is placed on the surface of the salty part or the rear part. From the viewpoint of economical manufacturing, it is more convenient to place the bifocal of the present invention on the non-ring-shaped surface. Convenient (but not required); that is, placed on the surface opposite to the annular surface. In a double toroidal contact lens, the front and rear surfaces of the child are both toric, and the bifocal element can be located at either On the surface. Any method for stabilizing toric lenses, such as prism stability and thin sections, can be used to stabilize a bifocal toric combination lens. Figures 10 and 11 show a preferred toric lens 2000, There is a torus portion on the front or rear end surface of the lens of the present invention. The preferred embodiment 200 has an edge lift of 0.030 mm 0.02, and a peripheral thickness 204 of 0.15 mm. The lens includes 0.3 The 80-degree thickness is 206. Referring to FIG. 11, it shows the upper lenticular biconvex portion 2 1 0, the optical section 2 i 2, and the slider 2 1 4. In the preferred embodiment, the Lens 2 has a neat width of 220 and an angle of 30 ° Degree 222. Of course, it is well known to those skilled in the art that these dimensions can be modified. The present invention may also include a method of using a contact lens structured according to the present invention. The method includes the user placing the contact lens Step of placing on the pupil of the user. The structure of the contact lens is according to the present invention. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the present invention also includes a method for prescribing a combination of contact lens structures, each of the contact lenses. The structures of are all constructed according to the present invention. In many users, the combination of such structures can further enhance the scope of visual performance, exceeding the performance achieved by the single structure of the present invention. In using a method called single vision, Traditional single vision lenses with different magnifications can be prescribed to these two eyes. Generally speaking, single vision with long-range magnification prescription is -40- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) Economy Printed by the Consumer Cooperatives of the Ministry of Intellectual Property Bureau 571142 A7 ----- 2Z____ V. Description of the Invention (38) On the user's preferred eyes, an early-vision lens with a near magnification of 1 is placed on the non-preferred eyes (although in some h 'brothers, the sequence of n is down and will have a distance of The lens is better placed on non-optimal eyes.) This method can provide a reasonable degree of distance and close vision, but only one eye at a time. Moreover, many users find that the overall vision of single vision is It is unacceptable because this method will cause mixed IL for both eyes and also because it provides vision for intermediate viewing distances. The combination of prescriptions in the present invention can minimize these shortcomings, which limit the results of single vision. In one such combination method, in the first lens of the present invention, the lens has a relatively small center region of close magnification, and the lens is a one-eye prescription. Although in this eye, the near vision in this structure is not emphasized, the central area is still large enough to provide the smallest but useful degree of near vision. On the other hand, long-distance vision is relatively enhanced under this structure. In this same method, one of the lenses of the present invention has a relatively large near-power center area, and the lens is the other eye. To this eye, near-distance vision under this structure is relatively strengthened, and at the same time, the undistorted long-range magnification is still useful. As a rule, lenses with a central area of this relatively small close magnification are prescribed to the superior eye, while lenses with a relatively large central area are prescribed to the non-dominant eye, but in some cases the opposite is true. The order may be better. The main advantage of this combination prescription method is that it provides much higher binocular vision compared to single vision, because it provides useful vision for both distant and near eyes. This method also has advantages. -41-This paper size is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm)-# 1 n II ϋ ϋ I ϋ I ϋ ϋ n ϋ ϋ I · 1 (Please first Read the note on the back? Matters and then fill out this page) 571142 A7 ----- B7 V. Description of the invention (39) It provides two eyes with a middle distance vision, because the lens of each eye has the The middle area of the gradient magnification. Therefore, with the combined prescription method in the present invention, the two main limitations of the single vision method are greatly reduced or eliminated. The embodiment described and shown in the text is for illustration only and is not intended to be limiting. The scope of the present invention is indicated in the scope of patent application, rather than the foregoing description and drawings. The invention may be embodied in other specific forms without departing from the spirit of the invention. For example, additional areas can be incorporated into the design. In particular, a further embodiment may include an additional aspherical area and an outer spherical area, so that the lens includes three spherical areas and two aspherical areas. The dimensions of each area must be made to fit into the pupil of the user. The changes resulting from the scope of the patent application will be included here. — Rl ·! ------ #-装 -------- Order- (Please read the notes on the back before filling in this purchase)

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -42- This paper size applies to China National Standard (CNS) A4 (210 X 297 public love)

Claims (1)

571142 Rhyme C8 D8 6. Scope of patent application _ Brush. 8. The lens according to item 5 of the scope of patent application, wherein the area of the iris of the adjacent user includes a set of dark colors that substantially absorb light. 9. The lens according to item 5 of the scope of patent application, wherein the first, second and third vision areas are located on a first surface of the lens, and a toric surface is located on a second surface of the lens. 10. The lens according to any one of items 3 to 9 of the scope of the patent application, wherein the lens includes a colorant. Π. The lens according to item 9 of the scope of patent application, wherein the first, second and third vision areas are located on a rear surface of the lens. 12. The lens according to item 11 of the scope of patent application, wherein at least a part of the lens is processed by a lathe. 13. The lens according to item 5 of the patent application scope, wherein the lens is made of a mold. 14. A lens according to item 5 of the patent application, wherein the lens includes a ring-shaped iris colored area. 15. The lens according to item 1 of the scope of patent application, wherein the lens is a contact lens. 16. The lens according to item 15 of the scope of patent application, wherein the contact lens is an intraocular lens. 17. The lens according to item 15 of the scope of patent application, wherein the first spherical area is at the center of the contact lens and has a diameter between 1.2 mm and 2.1 mm, which is configured to provide a close object Vision; 2 This paper size is applicable to Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before writing this page), 1T: Line 571142 C8 D8 6. The scope of patent application is around An aspheric area of the first spherical area; a second spherical area surrounding the spherical area, which is configured to provide the vision of a distant object. 18. The lens according to item 17 of the scope of the patent application, wherein the aspherical area It has an inner diameter between 1.2mm and 2.1mm, and an outer diameter between 2.3mm and 3.0mm. 19. According to the patent application No. 17, the second spherical area has an inner diameter between 2.3mm and 3.0. mm, and the outer diameter is 4.0mm to 8.4mm 〇 (Please read the precautions on the back before filling in this page) Note · ^? · The size of the paper is applicable to the Chinese National Standard (CNS) A4 (210 X 297) public )