TWI767863B - Intelligent multifocal toric lens - Google Patents

Abstract

A multifocal lens includes an optical center region. The optical center region includes a near vision region, a transition vision region, and a far vision region. An added power of the near vision region has a negative correlation with the radius of the near vision region. The transition vision region surrounds the near vision region. The reducing level of the power of the transition region is in a range of 0.1 D to 0.6D. An intersection is located between the near vision region and the far vision region. A power of the near vision region at the intersection is the same as a power of the transition region at the intersection. The far vision region surrounds the near vision region and the transition region. An intersection is located between the transition vision region and the far vision region. A power of the transition region at the intersection is the same as a power of the far vision region at the intersection.

Description

Smart Multifocal Astigmatism Lenses

The present disclosure relates to a multifocal lens, especially a multifocal lens with intelligent adjustment effect, and a multifocal astigmatism lens combined with astigmatism.

Most of the existing multifocal lenses need to be fitted by an optometrist for a long time. Due to the large difference in degrees between the near vision area and the distance vision area, it is easy for the wearer to have maladaptation and blurred vision in the middle distance vision area. People's pupils tend to shrink with age, which can cause the problem of unclear near vision to become serious. Therefore, a single size design of the near vision area cannot meet the wearing comfort and vision correction needs of different age groups.

In addition, among all patients with refractive errors, in addition to the highest proportion of myopia and hyperopia, astigmatism patients with corneal deformation also account for more than 30%. The cause of astigmatism comes from the deformation of the cornea into a rugby-like surface with double curvature of major and minor axes. Therefore, when the eyeball is adjusting the refraction, the long and short axis rays cannot focus on the same focus. In order to achieve effective astigmatism correction, the lens should not be rotated in the eye to maintain the correct astigmatism axis, so that the two-axis light can be simultaneously focused on the eye. on the same focus.

In view of this, how to provide a smart multifocal astigmatism lens that can design the near vision area according to the pupil size and has the function of intelligently adjusting the power difference between the near vision area and the distance vision area is still an urgent need for research in the industry. one of the goals.

An embodiment of the present disclosure is a smart multifocal lens.

In an embodiment of the present disclosure, the smart multifocal lens includes an optical center area, and the optical center area includes a near vision area, a conversion vision area, and a distance vision area. The additional diopter of the near vision zone is inversely related to the radius of the near vision zone. The converted vision zone surrounds the near vision zone, wherein the diopter drop of the converted vision zone falls in the range of 0.1D to 0.6D, wherein there is a junction between the near vision zone and the converted vision zone. The diopter of the near vision area at the junction is the same as the diopter of the converted vision area at this junction. The distance vision area surrounds the near vision area and the transition vision area. There is a junction between the conversion visual area and the distance visual area, and the diopter of the conversion visual area at the junction is the same as the diopter of the distance visual area at the junction.

In an embodiment of the present disclosure, the radius of the optical center region falls within a range of about 4 mm to 4.5 mm.

In an embodiment of the present disclosure, the distance between the inner diameter and the outer diameter of the transition region falls within a range of about 0.2 mm to 0.7 mm.

In an embodiment of the present disclosure, a radius of the close area is in the range of about 1.3 mm to 2.1 mm.

In an embodiment of the present disclosure, the additional diopter of the near vision zone falls in the range of about +0.25D to +3.50D.

In an embodiment of the present disclosure, the near vision area includes a first area and a second area surrounding the first area.

In an embodiment of the present disclosure, the diopter of the second region decreases as the distance from the center of the smart multifocal lens increases.

In an embodiment of the present disclosure, the first area is substantially a flat area, and the first area is connected to the second area.

In an embodiment of the present disclosure, the radius of the first region falls within a range of 0.00 mm to 1.00 mm.

In an embodiment of the present disclosure, the additional diopter of the distance zone falls in the range of about +0.5D to +1.50D.

An embodiment of the present disclosure is a smart multifocal astigmatic lens.

In an embodiment of the present disclosure, the smart multifocal lens includes an optical center area, and the optical center area includes a near vision area, a conversion vision area, and a distance vision area. The additional diopter of the near vision zone is inversely related to the radius of the near vision zone. The converted vision zone surrounds the near vision zone, wherein the diopter drop of the converted vision zone falls in the range of 0.1D to 0.6D, wherein there is a junction between the near vision zone and the converted vision zone. The diopter of the near vision area at the junction is the same as the diopter of the converted vision area at this junction. The distance vision area surrounds the near vision area and the transition vision area. There is a junction between the conversion visual area and the distance visual area, and the diopter of the conversion visual area at the junction is the same as the diopter of the distance visual area at the junction. The optical core area has astigmatic power and axial astigmatism, and is configured to correct astigmatism.

In an embodiment of the present disclosure, the radius of the optical center region falls within a range of about 4 mm to 4.5 mm.

In an embodiment of the present disclosure, the distance between the inner diameter and the outer diameter of the transition region falls within a range of about 0.2 mm to 0.7 mm.

In an embodiment of the present disclosure, a radius of the close area is in the range of about 1.3 mm to 2.1 mm.

In an embodiment of the present disclosure, the additional diopter of the near vision zone falls in the range of about +0.25D to +3.50D.

In an embodiment of the present disclosure, the near vision area includes a first area and a second area surrounding the first area.

In an embodiment of the present disclosure, the diopter of the second region decreases as the distance from the center of the smart multifocal lens increases.

In an embodiment of the present disclosure, the first area is substantially a flat area, and the first area is connected to the second area.

In an embodiment of the present disclosure, the radius of the first region falls within a range of 0.00 mm to 1.00 mm.

In an embodiment of the present disclosure, the additional diopter of the distance zone falls in the range of about +0.5D to +1.50D.

In an embodiment of the present disclosure, the astigmatic power falls in a range of about -0.5D to -3.50D.

In an embodiment of the present disclosure, the axial degree of astigmatism falls within a range of about 5 degrees to 180 degrees.

In the above-mentioned embodiment, the smart multifocal lens designs the additional diopter of the near vision area according to the size of the pupil radius to meet the vision of each age group Correction needs. Through the smoothing design of the diopter drop in the conversion visual area, it can achieve intelligent adjustment, reduce the maladaptive state of vision conversion and the effect of conversion time. The spherical aberration can be reduced by the design of the diopter drop in the long-distance vision area. In addition, the smart multifocal astigmatism lens can be designed with a double diopter change pattern, and can also improve the refractive error of presbyopic astigmatism patients.

100: Smart Multifocal Lenses

OZ: Optical Center Zone

110: Close Vision Zone

112: The first area

114: Second area

116, 118, 122: Junction

120: Convert visual area

130: Distant Vision Zone

R1, R2, R21, R22, R23, R24, R3: Radius

r1: inner diameter

r2: outer diameter

C: Center

D: distance

S1,S2,S3,S4,AS1,AS2,AS3: Curve

200, 200a: Smart Multifocal Astigmatism Lenses

210, 210a: Multifocal Astigmatism Optical Center

220, 220a: thickening stabilization zone

AX1, AX2, AX3: Axial

FIG. 1 is a top view of a smart multifocal lens according to an embodiment of the present disclosure.

FIG. 2 is a graph showing the relationship between the diopter and the radius of a smart multifocal lens according to an embodiment of the present disclosure.

Figure 3 shows the diopter range data for different age groups in Figure 2.

FIG. 4A is a top view of a smart multifocal astigmatic lens according to an embodiment of the present disclosure.

FIG. 4B is a top view of a smart multifocal astigmatic lens according to another embodiment of the present disclosure.

FIG. 5 is a diopter distribution diagram of an astigmatic lens according to an embodiment of the present disclosure.

FIG. 6 is a graph showing the relationship between the diopter and the radius of the multifocal astigmatic lens along different lenses according to an embodiment of the present disclosure.

The following will disclose a plurality of embodiments of the present invention with drawings, for the purpose of clarification. For the sake of clarity, many practical details are described in the following description. It should be understood, however, that these practical details should not be used to limit the invention. That is, in some embodiments of the invention, these practical details are unnecessary. In addition, for the purpose of simplifying the drawings, some well-known structures and elements will be shown in a simple and schematic manner in the drawings. Also, the thicknesses of layers and regions in the drawings may be exaggerated for clarity, and like reference numerals refer to like elements in the description of the drawings.

FIG. 1 is a top view of a smart multifocal lens 100 according to an embodiment of the present disclosure. The smart multifocal lens 100 includes an optical center area OZ, and the optical center area OZ includes a near vision area 110 , a conversion vision area 120 and a distance vision area 130 . The optical center zone OZ has a radius R1, and the radius R1 falls in the range of about 4 mm to 4.5 mm. The near vision zone 110 has a radius R2, and the radius R2 falls in the range of about 1.3 millimeters to 2.1 millimeters. The transition vision zone 120 surrounds the near vision zone 110 . The distance D between the inner diameter r1 and the outer diameter r2 of the converted vision zone 120 falls in the range of about 0.2 mm to 0.7 mm. The distance vision area 130 surrounds the transition vision area 120 and the near vision area 110 . Specifically, the diameter of the optical center zone OZ may encompass the wearer's pupil size. In this embodiment, the diameter of the optical core region OZ is about 8 mm to 9 mm, but the present disclosure is not limited to this.

The near vision area 110 includes a first area 112 and a second area 114 surrounding the first area 112 . The first area 112 is substantially a flat area, that is, the diopter of the first area 112 is a fixed value. The radius R3 of the first region 112 falls within the range of 0.00 mm to 1.00 mm, and the first region 112 is connected to the second region 114 . The diopter of the second region 114 varies with The distance from a center C of the smart multifocal lens 100 increases and decreases. In other words, the degree of the second region 114 increases in the radial direction.

FIG. 2 is a graph showing the relationship between the diopter and the radius of a smart multifocal lens according to an embodiment of the present disclosure. Figure 2 exemplifies the relationship between the diopter and the radius of the four smart multifocal lenses. The additional diopter ADD of the second region 114 of the near vision zone 110 of the present disclosure falls in the range of about +0.25D to +3.50D. In other words, the degree difference between the second area 114 and the first area 112 falls within the range of 25 degrees to 300 degrees. As can be seen from the data in FIG. 2, in this embodiment, the second region 114 where the additional diopter ADD falls in the range of about +0.75D to +2.25D is taken as an example. In this embodiment, the first region 112 with a radius of about 0.50 mm is used as an example. The distribution and radius of the additional diopter ADD in the second region 114 of the near vision region 110 are designed according to age, which will be described in detail later.

The diopter drop of the converted vision zone 120 falls in the range of 0.1D to 0.6D. In other words, the degree difference between the conversion vision area 120 and the near vision area 110 falls within a range of about 10 degrees to 60 degrees. For example, in one embodiment, the distance D between the inner diameter r1 and the outer diameter r2 of the converted visual area 120 is about 0.5 mm. The diopter drop of the conversion visual area 120 is designed according to the additional diopter ADD of the second area 114 of the near visual area 110 , so as to achieve the effect of adjusting the diopter difference between near and long distances, and avoid maladaptive or blurred vision.

The additional diopter of the distance vision zone 130 falls in the range of about +0.5D to +1.50D. In other words, the distance vision zone 130 and the transition The degree difference of the visual zone 120 falls within a range of about 50 to 150 degrees. By controlling the degree difference of the distance vision area 130 within this range, the occurrence of spherical aberration can be reduced.

It can be seen from Fig. 2 that the diopter of the optical center zone OZ is continuous with the change of the radius R1. Specifically, the diopter of the second region 114 is continuous with the diopter of the first region 112 . In other words, the diopter at the junction 116 of the second region 114 with the first region 112 (ie, at a radius of 0.50 mm) is the same and not stepped. Likewise, the diopter of the conversion vision zone 120 and the diopter of the near vision zone 110 are continuous, and the diopter of the distance vision zone 130 and the diopter of the conversion vision zone 120 are also continuous. That is, the diopter at the junction 118 of the near vision zone 110 and the transition vision zone 120 (ie, at a radius of 2.00 mm) is the same and not stepped. The diopter at the junction 122 of the distance vision zone 130 and the transition vision zone 120 (ie, at a radius of 2.50 mm) is also the same and not stepped. In this way, maladaptive or blurred vision conditions are avoided.

Figure 3 shows the diopter range data for different age groups in Figure 2. See also Figures 2 and 3. The diopter and radius data corresponding to the curves S1, S2, S3, and S4 in the second figure correspond to the age and diopter data of the groups 1, 2, 3, and 4 in the third figure, respectively. In this embodiment, the wearers are divided into four groups according to their age ranges, which are 40 to 50 years old for Group 1, 50 to 60 years old for Group 2, 60 to 70 years old for Group 3, and 70 to 80 years old for Group 4 age. That is, groups 1 to 4 correspond to the younger to older age ranges, respectively. It should be understood that the above-mentioned age groups are only examples, and those in the art can adjust the number and age of groups according to development needs. age range size. For example, in other embodiments, 5 years old can also be used as the age range, and eight age groups can be divided into eight age groups to define the diopter and radius of the near vision area 110 .

As can be seen from the figure, the near vision area 110 of Group 1 has a radius R21, and the radius R21 is 2.0 mm. In other embodiments, radius R21 may fall in the range of about 1.9 millimeters to 2.1 millimeters. The additional diopter ADD range of the second area 114 of the near vision area 110 of group 2 falls in the range of about +0.50D to +1.00D, that is, the degree of the second area 114 and the first area 112 of group 2 The difference falls in the range of about 50 to 100 degrees. It can be seen from the curve S1 in Fig. 3 that the diopter of the curve S1 is reduced from about -2.25D to -3.00D, that is, the degree difference of the curve S1 is about 75 degrees.

The near vision zone 110 of population 2 has a radius R22, and the radius R22 is 1.8 millimeters. In other embodiments, radius R22 may fall in the range of about 1.7 millimeters to 1.9 millimeters. The additional diopter ADD range of the second area 114 of the near vision area 110 of group 2 falls in the range of about +1.00D to +1.50D, that is, the difference in degree between the second area 114 and the first area 112 of group 2 falls in the range of about 100 degrees to 150 degrees. It can be seen from the curve S2 in Fig. 3 that the diopter of the curve S2 is reduced from about -1.75D to -3.00D, that is, the degree difference of the curve S2 is about 125 degrees.

The near vision zone 110 of Group 3 has a radius R23, and the radius R23 is 1.6 millimeters. In other embodiments, radius R23 may fall in the range of about 1.5 millimeters to 1.7 millimeters. close-up vision of clan 3 The additional diopter ADD range of the second area 114 of the zone 110 falls in the range of about +1.50D to +2.00D, that is, the power difference between the second area 114 and the first area 112 of the group 3 falls within about 150 degrees to 200 degrees in the range of degrees. It can be seen from the curve S3 in Fig. 2 that the diopter of the curve S3 decreases from -1.25D to -3.00D, that is, the difference in the degree of the curve S3 is approximately 175 degrees.

The radius R24 of the near vision zone 110 for Group 4 is 1.4 mm. In other embodiments, radius R24 may fall in the range of about 1.3 millimeters to 1.5 millimeters. The additional diopter ADD range of the second region 114 of the near vision zone 110 of Group 4 falls in the range of about +2.00D to +2.50D, that is, the diopter difference between the second region 114 of Group 4 and the first region 112 falls within the range of about +2.00D to +2.50D in the range of about 200 to 250 degrees. It can be seen from the curve S4 in Fig. 2 that the diopter of the curve S4 is reduced from about -0.75D to -3.00D, that is, the degree difference of the curve S4 is about 225 degrees.

It can be seen from the curves S1 to S4 that the additional diopter ADD of the near vision area 110 is negatively correlated with the radius R2. In general, pupil size tends to decrease with age. Therefore, by grouping the additional diopter ADD of the near vision area 110 according to age, the needs of each age group to correct vision in the near vision area 110 can be closer. In addition, since the radius R2 of the near vision area 110 is designed according to the size of the pupil, such a design can also reduce the discomfort of wearing. The above design can be applied to soft contact lenses, hard contact lenses, frame glasses, etc., and used to correct presbyopia, astigmatism, and the like. In other words, according to this The design can also achieve the effect of correcting presbyopia of all ages.

It can be seen from the curve S1 to the curve S4 that the diopter of the conversion visual area 120 will continue to decrease gradually with the additional diopter ADD of the near visual area 110 . By controlling the diopter drop of the conversion visual area 120 in the range of 0.1D to 0.6D, the vision can be smoothed when the vision is converted between the near visual area 110 and the distance visual area 130, reducing the conversion of visual acuity. Maladaptive conditions and transition times. The size of the radius of the second region 114 of the present disclosure may vary according to the design of different groups. In FIG. 3 , only the size of the second region 114 and the converted visual area 120 of the curve S1 are marked.

It can be seen from the curve S1 to the curve S4 that the diopter drop of the distance vision zone 130 is controlled in the range of about 0.5D to 1.50D. Generally speaking, the size of the radius of the distance vision zone 130 is different according to the size of the optical center zone OZ, the size of the near vision zone 110 and the size of the transition vision zone 120 . For example, a smart multifocal lens with a radius R1 of an optical center zone OZ of 4 mm may have a near vision zone 110 with a radius R2 of 1.4 mm, a conversion vision zone 120 with a distance D of 0.5 mm, and a distance vision of 2.1 mm District 130. Therefore, as long as the degree difference in the distance vision zone 130 is controlled within the range of 50 degrees to 150 degrees, the phenomenon of spherical aberration can be effectively reduced.

FIG. 4A is a top view of a smart multifocal astigmatic lens 200 according to an embodiment of the present disclosure. The smart multifocal astigmatism lens 200 includes a multifocal astigmatism optical center region 210 and an astigmatism thickening stabilization region 220 . In this embodiment, the astigmatism thickening stabilization zone 220 is located below the lens, and is a diamond mirror vertical type. (Prism-Ballast Type) astigmatic lenses. For example, this embodiment may be a soft contact lens.

FIG. 4B is a top view of a smart multifocal astigmatic lens 200a according to another embodiment of the present disclosure. The smart multifocal astigmatic lens 200a also includes a multifocal astigmatism optical core area 210a and an astigmatic thickening stabilization area 220a. In this embodiment, there are two astigmatism thickening stabilization zones 220a, which are located on the left and right sides of the lens, respectively, and are double-slab-off type astigmatism lenses.

The above-mentioned astigmatism optical core regions 210 and 210a all include the aforementioned near vision region, converted vision region and far vision region. The astigmatism thickening stabilization zones 220, 220a are configured so that the lens does not rotate after wearing, so as to maintain the correct corrective function, and the design of the stabilization zone is not limited to the above types.

FIG. 5 is a diopter distribution diagram of an astigmatic lens according to an embodiment of the present disclosure. Specifically, astigmatism optics is a dual diopter change type, including spherical diopter (Power), astigmatic diopter (Cylinder Correction), and astigmatic diopter (Axis). The embodiment in Fig. 5 is an example of spherical diopter -3.00D (300 degrees), astigmatic diopter -1.25D (125 degrees astigmatism), and 180 degrees of axial astigmatism. Therefore, as shown in Figure 5, the diopter between a lens angle of 90 degrees and a lens angle of 270 degrees is about -4.25D, and the diopter of a lens angle of 0 degrees and a lens angle of 180 degrees is about -3.00D.

FIG. 6 is a graph showing the relationship between the diopter and the radius of the multifocal astigmatic lens along different lenses according to an embodiment of the present disclosure. 4A and 6 are also referred to. Figure 4A shows the axial directions AX1, 45 at 0 degrees, respectively AX2 in the axial direction of 90 degrees, and AX3 in the axial direction of 90 degrees. The curves AS1, AS2, and AS3 in Fig. 6 represent the relationship curves of the diopter and the radius along the axial directions AX1, AX2, and AX3, respectively. In this embodiment, the spherical diopter of -4.00D, the astigmatic diopter of -1.25D, the axial diopter of 180 degrees, and the additional diopter of +1.25D (ie, the presbyopia addition) are taken as examples. It can be seen from this that the multifocal astigmatic lens of the present disclosure can simultaneously satisfy the requirements of the relationship between the diopter and the radius as shown in FIG. 2 , as well as the diopter and the axial degree of astigmatism. In this way, such a design can provide astigmatism and presbyopia patients with a clear visual effect both near and far.

In some embodiments, the spherical diopter range of the multifocal astigmatic lens can be in the range of +10.0D~-10.0D, the astigmatic diopter can be in the range of -0.50D~-3.50D, and the axial degree of astigmatism can be in the range of 5°~ In the range of 180°, and the additional diopter can be in the range of +0.75D~+3.50D. The above-mentioned optical designs can be arranged on the same side of the lens (front arc or rear arc) at the same time, or can be respectively arranged on one side of the lens, both of which can have the effect of intelligent multi-focus and correction of astigmatism.

According to the above, the smart multifocal lens of the present disclosure designs the additional diopter of the near vision area according to the size of the pupil radius to meet the vision correction needs of various age groups. Through the smoothing design of the diopter drop in the conversion visual area, it can achieve intelligent adjustment, reduce the maladaptive state of vision conversion and the effect of conversion time. The spherical aberration can be reduced by the design of the diopter drop in the long-distance vision area. In addition, according to the axial degree of astigmatism and astigmatism diopter, smart multifocal lenses can also have the effect of correcting astigmatism.

Although the present disclosure has been disclosed above in an embodiment, it is not intended to To limit this disclosure, any person skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure. Therefore, the protection scope of this disclosure should be determined by the scope of the appended patent application.

112: The first area

114: Second area

120: Convert visual area

130: Distant Vision Zone

R21, R22, R23, R24: Radius

S1, S2, S3, S4: Curves

Claims (22)

A smart multifocal lens, comprising: an optical center area, including: a near vision area, an additional diopter of the near vision area is negatively correlated with the radius of the near vision area; a conversion vision area, surrounding the near vision area distance vision zone, wherein a diopter drop of the converted vision zone falls in the range of 0.1D to 0.6D, wherein there is a junction between the near vision zone and the converted vision zone, and the near vision zone is in the range of 0.1D to 0.6D The diopter at the junction is the same as the diopter of the conversion vision zone at the junction; and a distance vision zone surrounding the near vision zone and the conversion vision zone, wherein there is a distance between the conversion vision zone and the distance vision zone A junction, and the diopter of the converted vision zone at the junction is the same as the diopter of the distance vision zone at the junction. The smart multifocal lens of claim 1, wherein a radius of the optical center region falls within a range of about 4 millimeters to 4.5 millimeters. The smart multifocal lens of claim 1, wherein a distance between an inner diameter and an outer diameter of the converted vision zone falls within a range of about 0.2 mm to 0.7 mm. The smart multifocal lens of claim 1, wherein a radius of the near vision zone falls within a range of about 1.3 mm to 2.1 mm middle. The smart multifocal lens of claim 1, wherein the additional diopter of the near vision zone falls within a range of about +0.25D to +3.50D. The smart multifocal lens of claim 1, wherein the near vision area includes a first area and a second area surrounding the first area. The smart multifocal lens of claim 6, wherein the diopter of the second region decreases as the distance from a center of the smart multifocal lens increases. The smart multifocal lens of claim 6, wherein the first area is substantially a flat light area, and the first area is connected to the second area. The smart multifocal lens of claim 6, wherein a radius of the first region falls within a range of 0.00 mm to 1.00 mm. The smart multifocal lens of claim 1, wherein an additional diopter of the distance vision zone falls within a range of about +0.5D to +1.50D. A multifocal astigmatic lens, comprising: an optical center area, including: a near vision area, an additional diopter of the near vision area is negatively correlated with the radius of the near vision area; a conversion vision area, surrounding the near vision area distance vision zone, wherein a diopter drop of the converted vision zone falls in the range of 0.1D to 0.6D, wherein there is a junction between the near vision zone and the converted vision zone, and the near vision zone is in the range of 0.1D to 0.6D The diopter at the junction is the same as the diopter of the conversion vision zone at the junction; and a distance vision zone surrounding the near vision zone and the conversion vision zone, wherein there is a distance between the conversion vision zone and the distance vision zone A junction, and the diopter of the converted vision area at the junction is the same as the diopter of the distance vision area at the junction; wherein the optical center area has an astigmatic diopter and an astigmatic axis, configured to correct astigmatism. The multifocal astigmatic lens of claim 11, wherein a radius of the optical center region falls within a range of about 4 millimeters to 4.5 millimeters. The multifocal astigmatic lens of claim 11, wherein a distance between an inner diameter and an outer diameter of the converted vision zone is in the range of about 0.2 millimeters to 0.7 millimeters. The multifocal astigmatic lens of claim 11, wherein A radius of the near vision zone falls in the range of about 1.3 mm to 2.1 mm. The multifocal astigmatic lens of claim 11, wherein the additional diopter of the near vision zone is in the range of about +0.25D to +3.50D. The multifocal astigmatic lens of claim 11, wherein the near vision zone includes a first region and a second region surrounding the first region. The multifocal astigmatic lens of claim 16, wherein the diopter of the second region decreases with increasing distance from a center of the multifocal astigmatic lens. The multifocal astigmatic lens of claim 16, wherein the first area is substantially a flat area, and the first area is connected to the second area. The multifocal astigmatic lens of claim 16, wherein a radius of the first region falls within the range of 0.00 mm to 1.00 mm. The multifocal astigmatic lens of claim 11, wherein An additional diopter of the distance vision zone falls in the range of about +0.5D to +1.50D. The multifocal astigmatic lens of claim 11, wherein the astigmatic power is in the range of about -0.5D to -3.50D. The multifocal astigmatic lens of claim 11, wherein the axial degree of astigmatism falls within a range of about 5 degrees to 180 degrees.

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