CN217112923U - Optical lens - Google Patents
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- CN217112923U CN217112923U CN202220252267.XU CN202220252267U CN217112923U CN 217112923 U CN217112923 U CN 217112923U CN 202220252267 U CN202220252267 U CN 202220252267U CN 217112923 U CN217112923 U CN 217112923U
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Abstract
The utility model provides an optical lens which can be used for inhibiting the growth of the axis of the eye and delaying the development of myopia, the optical lens comprises a central optical area and a middle optical area which are distributed outwards from the center along the radial direction; the intermediate peripheral optic zone has 1-step dioptric zones having a refractive power different from that of the central optic zone and 0-step dioptric zones having a refractive power equivalent to that of the central optic zone, and the 1-step dioptric zones and the 0-step dioptric zones are arranged in concentric rings alternately arranged in the radial direction.
Description
Technical Field
The utility model relates to an optical field is looked to the eye, in particular to can utilize out of focus mechanism to restrain the eye axis and increase, delays the optical lens piece of near-sighted development.
Background
Defocus (Defocus, out-of-focus) is a corresponding word of focus (focus), and Defocus refers to an image plane not in focus and is divided into two states of front Defocus (before focus) and rear Defocus (after focus).
The main reason for the increase of the myopic eye degree is the lengthening of the axial length of the eye, and the degree is increased by 3.00 degrees every 1.00mm of the lengthening. Medical studies have demonstrated that elongation of the eye depends on peripheral defocus of the retina (shown as 100 in fig. 1), and that, in terms of dioptric concepts, a person with a focus in front of the retina is called myopic defocus (shown as 101 in fig. 1) and a person with a focus behind the retina is called hyperopic defocus (shown as 102 in fig. 1). The central part of the retina of the myopic eye is myopic defocus, while the periphery of the retina is hyperopic defocus, and the hyperopic defocus at the periphery of the retina is a main reason for promoting the increasing of the myopic eye degree.
The eyeball has the characteristic of inducing the development of the eyeball by depending on the imaging of the periphery of the retina, particularly the myopia of teenagers below 18 years old, if the imaging of the periphery of the retina is hyperopic defocusing, the retina tends to grow to an image point, the length of the eyeball is prolonged, and if the imaging of the periphery of the retina is myopic defocusing, the eyeball is stopped being prolonged. If the peripheral hyperopic defocus of the retina is corrected or the peripheral myopic defocus of the retina is artificially formed by modern medical treatment, the continuous increase of the myopic degree can be prevented.
The concept of peripheral defocus is organized and summarized in the actual clinic in the field of optometry. The doctor found that the corneal power profile of the orthokeratology lens wearer had a tendency to be low in the center and gradually higher along the periphery (as shown in figure 2). Further, the effect of peripheral defocus therein was found. The initial general recognition was that the "bullseye" area after shaping (shown as 103 in figure 2), where the power is greatest, was critical in the control of myopia. With the development of detection instruments and more clinical data published, the latest opinion suggests that the defocus effect in the entrance pupil plays a key role in myopia control, specifically: the larger the defocusing amount of the entrance pupil area is, the larger the defocusing area is, and the better the myopia control effect is.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides an optical lens suitable for correcting myopia, which can inhibit the increase of the eye axis and delay the development of myopia. The optical lens comprises a central optical zone and a middle optical zone which are distributed from the center to the outside along the radial direction; the intermediate peripheral optic zone has 1-step dioptric zones having a refractive power different from that of the central optic zone and 0-step dioptric zones having a refractive power equivalent to that of the central optic zone, and the 1-step dioptric zones and the 0-step dioptric zones are arranged in concentric rings alternately arranged in the radial direction.
The utility model provides an optical lens piece's main advantage does: firstly, a near-sighted out-of-focus state at a moment is provided, and besides near-sighted peripheral out-of-focus brought by emmetropia, a wearer can realize instant and effective near-sighted out-of-focus effect when the head rotates and the eyeballs rotate; the utilization rate of the defocusing area of the lens is high, the utility model breaks through the bottleneck of low utilization rate of the traditional lattice arrangement, and the concentric ring design is adopted to provide larger area and more abundant defocusing amount; and the refractive power transition can be easily smoothed, and the aspheric surface technology can be selected to smooth the refractive power transition between each area and each ring, reduce the bad vision phenomenon and shorten the adaptation period. Furthermore, the utility model discloses lens can also be applicable to the presbyopia and correct, provides near vision and distance vision simultaneously for the presbyopia patient.
The term "ring" as used herein refers to a single region divided by refractive power, for example, a plurality of small lenses are arranged in an imaginary circle at intervals, and the small lenses are not connected to each other at intervals, so that the small lenses cannot be regarded as "ring" in the "concentric ring" described herein.
As one possible implementation, the mean sagittal height difference Δ h of the 1 st power zone relative to the equivalent central optical zone is (1.0E-6) mm to 10mm, or (2.0E-4) mm to (5.5E-3) mm, or (2.0E-3) mm to (3.5E-3) mm.
As one possible implementation, the number of 1-order dioptric regions is greater than 1.
As a possible realization mode, the difference Delta D between the refractive power of the 1-step refractive area and the refractive power of the central optical area is larger than zero, or 0.5-10.0D, or 2.5-5.0D.
As a possible implementation manner, the power of each 1 st-order dioptric region is distributed from the center to the outside in the radial direction in a trend that: constant, or gradually increasing, or gradually decreasing, or increasing first and then decreasing, or decreasing first and then increasing, or alternately increasing and decreasing.
As a possible implementation manner, the junction of the 1 st order dioptric region and the central optical region and/or the 0 th order dioptric region is aspheric, so that the refractive power changes of two adjacent regions are continuous.
As one possible implementation, the area ratio of the 1 st order refractive region on the middle optical region is 20% to 100%, or 45% to 55%.
As a possible implementation manner, the ring width of the single 1-level light bending area is 0.1-30 mm, or 0.5-3.0 mm, or 1.0-2.0 mm.
As a possible realization mode, the ring width of the 1-step light refraction area is not less than 1 mm.
As a possible implementation manner, the ring width ratio of the adjacent 1-level light bending region to the 0-level light bending region is 1:10 to 10:1, or 1:3 to 3:1, or 1: 1.
As a possible implementation, the refractive power and/or the ring width of each of the 1 st order dioptric regions are the same.
As one possible implementation, the refractive power and/or the ring width of each of the 1 st order dioptric regions are different.
As a possible implementation manner, the ring width of each 1 st-order dioptric region is distributed from the center to the radial direction outwards in the following distribution trend: constant, or gradually increasing, or gradually decreasing, or increasing first and then decreasing, or decreasing first and then increasing, or alternately increasing and decreasing.
As a possible implementation, the ring width of each of the 0 th order refraction regions is different.
As a possible implementation manner, the ring width of each 0 th order refraction region is distributed from the center to the radial direction outwards in the following distribution trend: constant, or gradually increasing, or gradually decreasing, or increasing first and then decreasing, or decreasing first and then increasing, or alternately increasing and decreasing.
As a possible implementation, the difference Δ D between the power of the 1 st refractive zone and the power of the central optic zone is less than zero.
As a possible implementation manner, the number of the 1-level bending areas is 2-50, or 3-30, or 4-15.
As a possible implementation manner, the number of the 0-level bending areas is 1-50, or 2-30, or 4-10.
As a possible implementation, the variation of the refractive power of the 1 st dioptric zone with respect to the central optical zone is achieved by a variation of the surface type of the posterior or anterior surface of the lens.
As a possible implementation, the refractive power variation of the central optical zone, the 1 st order dioptric zone and the 0 th order dioptric zone is realized by material variation.
As a possible implementation manner, the outer contour lines of the central optical zone, the 1 st-order bending zone and the 0 th-order bending zone are all closed figures, and the closed figures are one of circles, ellipses, shells, hexagons and clover shapes.
As one possible implementation, at least two of the central optical zone, the 1 st dioptric zone, and the 0 th dioptric zone have different outer profiles.
As a possible implementation manner, the outer contour lines of the central optical zone, the 1 st-order light bending zone and the 0 th-order light bending zone are the same.
As a possible implementation manner, when viewed along the optical axis direction of the lens, the widths of the 1 st order light refraction region and the 0 th order light refraction region in any direction perpendicular to the optical axis plane are both greater than 0 and cannot be 0 or close to 0. In addition, the ring width may be constant in the circumferential direction.
As a possible realization mode, the lens is made of light-permeable materials with the refractive index of 1.5-1.8.
As a possible implementation manner, the diameter of the central optical zone is 3 to 30mm, or 5 to 15mm, or 9 to 12 mm; the ring width of the middle optical zone is 5-40 mm, or 10-20 mm.
As a possible implementation, the lens also comprises a peripheral optic zone of refractive power equivalent to that of the central optic zone, the peripheral optic zone being radially external to the intermediate optic zone.
Drawings
FIG. 1 is a schematic diagram of near-sighted defocus and far-sighted defocus;
FIG. 2 is a corneal refractive profile of a wearer of a orthokeratology lens;
FIG. 3 is a schematic view of a Cowber optic multifocal soft contact lens;
FIG. 4 is a schematic diagram of the refractive power of the multifocal soft contact lens of FIG. 3;
FIG. 5 is a schematic view of a generation 2 myopia control type of framed glasses;
FIG. 6 is a schematic view of an eyeball during emmetropia and a keratoplasty mirror;
FIG. 7 is a schematic view of an eyeball during rotation and a corneal shaping mirror;
FIG. 8 is a schematic view of a 3 rd generation myopia control type of framed glasses;
FIG. 9 is a schematic view of an alternative 3 rd generation myopia control type of framed glasses;
FIG. 10 is a schematic view of a third generation 3 myopia control frame of glasses;
FIG. 11 is a schematic view of a fourth generation 3 myopia control frame of glasses;
fig. 12 is a schematic view of an optical lens in an embodiment of the invention;
fig. 13 is a schematic view of an optical lens in embodiment 1 of the present invention;
FIG. 14 is a graph of the change in power of the optic of FIG. 13;
fig. 15 is a schematic view of an optical lens in embodiment 2 of the present invention;
FIG. 16 is a graph of the change in power of the optic of FIG. 15;
fig. 17 is a schematic view of an optical lens in embodiment 3 of the present invention;
FIG. 18 is a graph of the change in power of the optic of FIG. 17;
fig. 19 is a schematic view of an optical lens in embodiment 4 of the present invention;
FIG. 20 is a graph showing the change in refractive power of the optic of FIG. 19;
fig. 21 is a schematic view of an optical lens in embodiment 5 of the present invention;
FIG. 22 is a graph showing the change in power of the optic of FIG. 21;
fig. 23 is a schematic view of an optical lens in embodiment 6 of the present invention;
fig. 24 is a graph showing the change in refractive power of the optical lens of fig. 23.
Description of the reference numerals
106 lenslets; 210 a central optical zone; 220 a mid-peripheral optical zone; 2211 grade of light bending area; 2220 grade light refraction area; 230 out of focus.
Detailed Description
Based on the continuous perfection of peripheral defocus mechanisms and their influencing factors, more and more optical approaches have been published for myopia control, with more efficient multifocal soft lenses designed for concentric rings (as shown in fig. 3). A soft multifocal contact lens (patent: US6929366) has been approved by the FDA and is the first contact lens to inhibit axial growth. The effectiveness of the concentric circle bifocal optical intervention refines the knowledge of peripheral defocus, namely: the realization of myopic peripheral defocus does not have to be continuous and an intermittent arrangement of the refractive power is also effective (as shown in figure 4). As long as the correction signal and the myopic defocus signal exist in the entrance pupil area at the same time, the signal can be seen clearly, and the myopic defocus signal exists, the method is helpful for the myopia control effect.
The frame mirror is a safer and more convenient optical means than a cornea shaping mirror and a contact lens. In recent years, more and more framed glasses for myopia control have been published.
The 1 st substitute for the frame glasses for controlling myopia is a mode of adding light and gradually advancing tablets, and is based on an adjusting and adjusting hysteresis mechanism, but the optical means has low myopia control efficiency, is easy to bring adverse effects to the visual function of a wearer, and is gradually eliminated.
The 2 nd generation myopia control type of framed glasses are based on a peripheral out-of-focus progressive focal arrangement, known as a progressive zoom or ring focus design. Figure 5 is a schematic view of a generation 2 myopia control type of framed glasses. As shown in fig. 5, the optical design is such that the power of the central shell-shaped zone (or circular zone, etc.) is constant, and for myopia correction, the power gradually increases along the central zone towards the outside. The clinical effective rate of the method is lower, about 10%, and some studies suggest that the method has no statistical difference with a common single-lens microscope. The toroidal-focus lens has the advantages of continuous and gradual refractive power change, good visual quality and easy adaptation. But the design principle of the artificial cornea contact lens completely conforms to peripheral defocusing caused by a cornea shaping lens, and the main reason of low efficiency is the existence of the lens eye distance. Fig. 6 is a schematic view of the eyeball during normal viewing and the corneal reshaping mirror, and fig. 7 is a schematic view of the eyeball during rotation and the corneal reshaping mirror. As shown in fig. 6 and 7, myopic peripheral defocus is formed only in emmetropia, and when the eyeball rotates, under-correction (as shown by 104 in fig. 7) and hyperopic defocus (as shown by 105 in fig. 7) are formed.
The 3 rd generation myopia control type framed glasses are arranged intermittently based on peripheral defocus and are called multipoint, annular island, microlens, etc. Figure 8 is a schematic diagram of a 3 rd generation myopia control type of framed glasses, as shown in figure 8, the 3 rd generation myopia control type of framed glasses are optically designed with lenslets 106 with higher power than the center distributed randomly around the periphery of the lens. The clinical effective rate of the method is high and is 40-60%. Compared with the 2 nd generation gradual change design, the multi-point design solves the problem that the wearer cannot form myopic peripheral defocus when the eyeball rotates. However, the optical power distribution is discontinuous and jumps, which brings poor visual quality such as starburst and jump images, and is difficult for the wearer to adapt. FIG. 9 is a schematic view of an alternative 3 rd generation myopia control type of framed glasses; FIG. 10 is a schematic view of a third generation 3 myopia control frame of glasses; FIG. 11 is a schematic view of a fourth generation 3 myopia control frame mirror. As shown in fig. 9-11, the lenses of the multi-point design implement the out-of-focus areas of hexagonal arrangement, circular arrangement, or radial arrangement, etc. through the circular microlenses, but because the circular microlenses cannot implement the close arrangement (i.e. there are gaps between adjacent microlenses), the utilization rate of the out-of-focus areas of the lenses is low.
In view of the above problems of the prior art, the present application proposes various embodiments of an optical lens to be described in detail below.
The term "radial" as used in the present invention refers to a linear direction from the center of the lens along a radius or diameter.
The term "aperture" as used in the present invention refers to the radial diameter of the lens surface.
The term "ring width" as used in the present invention refers to the width of a certain ring area in the radial direction, for example, for a certain ring area of a lens, the ring width refers to the length of a straight line from the center of the lens in the radial direction in the area.
Terms used in the present invention to indicate the azimuthal relationship, such as "anterior" and "posterior", are relative to the distance of the corneal surface of the eye. For example, for the lenses of the invention, the "posterior surface" is the surface closer to the cornea of the eye than the "anterior surface".
The term "power change Δ D" as used in the present invention refers to the difference between the maximum power and the minimum power over the range of the aperture referred to.
The term "equivalent central optic zone profile" as used in the present invention refers to the profile curve that would result if the range were the same power as the central optic zone.
The term "average rise Δ h" as used in the present invention refers to the average of the height differences that occur in the case where there is at least one intersection point between the two curves of the range comparison.
The term "continuous" as used in the present application is an attribute of a mathematical function, with the rough understanding that its functional image is a single unbroken curve with no discontinuities, jumps or infinitely approximated oscillations.
Some acronyms are used herein:
DIA lens overall diameter
The refractive index of the IR material;
r radius of curvature;
the center thickness of the CT.
Herein, the suffix "a" of a certain parameter indicates that the parameter is a parameter related to the anterior surface of the optical portion, for example, Ra indicates the radius of curvature of the anterior surface of the optical portion, and the suffix "p" of a certain parameter indicates that the parameter is a parameter related to the posterior surface of the optical portion, for example, Rp indicates the radius of curvature of the posterior surface of the optical portion.
The specific structure of the optical lens of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 12 is a schematic view of an optical lens in an embodiment of the present invention, as shown in fig. 12, the diameter of the optical lens provided by the present invention may be 40-100 mm, preferably 70-80 mm. The optical lens comprises a central optic zone 210 and a peripheral optic zone 220 distributed radially outwardly from the center, wherein the central optic zone 210 is a range of circular or elliptical, etc. shaped zones centered about the center of the lens, which may have corresponding refractive powers for myopic correction in the wearer. The diameter of the central optical zone 210 may be 3 to 30mm, preferably 5 to 15mm, and more preferably 9 to 12 mm.
The ring width of the middle optical zone 220 may be 5 to 40mm, preferably 10 to 20 mm. The difference between the present invention and the prior art is that the intermediate peripheral optic zone 220 has a 1 st diopter zone 221 with refractive power different from the central optic zone 210 and a 0 diopter zone 222 with refractive power equal to the central optic zone 210, and the 1 diopter zone 221 and the 0 diopter zone 222 are arranged in a concentric ring shape along the radial direction and alternately arranged.
In the present invention, the refractive power of the 1 st dioptric zone 221 is generally higher than that of the central optical zone 210, and is out of focus for the wearer to retard myopia progression. Specifically, the difference Δ D between the power of the 1 st power zone 221 and the power of the central optic zone 210 may be greater than zero, preferably 0.5-10.0D, more preferably 2.5-5.0D; the power of the 0 th order dioptric region 222 is equivalent to the power of the central optic zone 210 and is used for vision correction by the wearer when not emmetropic.
Additionally, in other embodiments, the optical lens of the present invention may further comprise a peripheral optic zone having a refractive power equivalent to that of central optic zone 210, the peripheral optic zone being radially outward of intermediate peripheral optic zone 220. The peripheral optic zone has an equivalent (substantially the same) power as the central optic zone 210, further providing the wearer with distance vision requirements to ensure visual quality.
Additionally, it will be appreciated that in other embodiments, the difference Δ D between the power of the 1 st power zone 221 and the power of the central optic zone 210 may also be less than zero. The utility model discloses, when the 1 st diopter district 221 refractive power of lens is less than central optics district 210 refractive power, can be used for presbyopia wearer's vision correction.
Further, the utility model discloses in, the quantity of 1 grade dioptric region 221 can be greater than 1, can be 2 ~ 50, preferably 3 ~ 30, more preferably 4 ~ 15. The power and/or ring width of each 1 st refractive zone 221 may be the same, or the power and/or ring width of each 1 st refractive zone 221 may be different.
Further, the power distribution trend of the plurality of 1 st order dioptric regions 221 combined from the center radially outward may be: constant, or gradually increasing, or gradually decreasing, or increasing first and then decreasing, or decreasing first and then increasing, or alternately increasing and decreasing.
Further, the junction between the 1 st-order refractive region 221 and the central optical region 210 and/or the 0 th-order refractive region 222 may be aspheric, so that the refractive power changes of the two adjacent regions are continuous. For example, the junction of the central optical zone 210 and the 1 st dioptric zone 221 may be aspheric, or the junction of the 1 st dioptric zone 221 and the 0 th dioptric zone 222 may be aspheric, or both. With the concentric ring-shaped structure, continuity of refractive power change can be easily achieved, for example, as compared with a structure of a plurality of small lenses. Wherein, the total area of the 1-level light-bending area 221 can be 30-7800 mm 2 Preferably 100 to 1500mm 2 More preferably 400 to 800mm 2 . The 1 st power zone 221 may have an area ratio of 20% to 100%, preferably 45% to 55%, of the total area of the intermediate optical zone 220.
The ring width of the single 1-level light bending region 221 may be 0.1-30 mm, preferably 0.5-3.0 mm, and more preferably 1.0-2.0 mm. Alternatively, the ring width of the single step-1 power zone 221 is not less than 1 mm. Further, the ring widths of the plurality of 1 st order dioptric regions 221 are distributed radially outward from the center with a tendency: constant, or gradually increasing, or gradually decreasing, or increasing first and then decreasing, or decreasing first and then increasing, or alternately increasing and decreasing.
The number of the 0-level light-bending regions 222 may be 1 to 50, preferably 2 to 30, and more preferably 4 to 10. The ring width of each 0 th order dioptric region 222 may be the same, or the ring width of each 0 th order dioptric region 222 may be different. Further, the distribution trend of the ring widths of the plurality of 0-step light bending regions 222 from the center to the radial direction outward may be: constant, or gradually increasing, or gradually decreasing, or increasing first and then decreasing, or decreasing first and then increasing, or alternately increasing and decreasing.
The ring width ratio of the adjacent 1-step dioptric region 221 and 0-step dioptric region 222 can be (1:10) - (10:1), preferably (1:3) - (3:1), and more preferably (1: 1).
Additionally, the lens, when observing along the optical axis direction of lens, 1 level is bent light zone and 0 level is bent light zone and is all greater than 0 at the ascending width in arbitrary direction in the perpendicular to optical axis plane, can not be 0 or be close 0. The width here refers to the width of the 1 st order bending region and the 0 th order bending region in any direction in a plane perpendicular to the optical axis direction, and is not limited to the width in the radial direction.
Alternatively, the variation in power of the 1 st order refractive zone 221 relative to the central optic zone 210 is achieved by a change in the profile of the posterior or anterior surface of the lens. Specifically, the average sagittal height difference Δ h of the 1 st order dioptric zone 221 with respect to the surface form of the equivalent central optical zone 210 may be (1.0E-6) mm to 10mm, preferably (2.0E-4) mm to (5.5E-3) mm, and more preferably (2.0E-3) mm to (3.5E-3) mm.
Optionally, the central optical zone 210 has a specific prescription sphere power or a specific prescription sphere power and prescription cylinder power. The spherical power of the lens can be between +30.0D and-30.0D, preferably between 0 and-30.0D, and more preferably between 0 and-10.0D. The lens cylinder may be from +10.0D to-10.0D, preferably from 0 to-10.0D, more preferably from 0 to-5.0D.
Alternatively, the power variation of the central optical zone 210, the 1 st order refractive region 221, and the 0 th order refractive region 222 may be realized by material (material) and/or refractive index variation. The utility model discloses in, the lens is made by the light-permeable material, and preferably PC material or resin material, the refracting index of this lens material is 1.5 ~ 1.8, preferably 1.56, 1.60, 1.67.
Further, in the present invention, the outer contour lines (boundary lines) of the central optical zone 210, the 1 st diopter zone 221, and the 0 th diopter zone 222 are closed figures, and the closed figures may be one of circular, oval, conchoidal, hexagonal, and clover. The outer contour lines of at least two of the central optical region 210, the 1 st-order light bending region 221, and the 0 th-order light bending region 222 may be different, for example, the outer contour line of the central optical region 210 is circular, the outer contour line of the 1 st-order light bending region 221 is oval, and the outer contour line of the 0 th-order light bending region 222 is circular; alternatively, the central optical zone 210 has a circular outer contour, the 1 st-order bending region 221 has a circular outer contour, and the 0 th-order bending region 222 has an elliptical outer contour. For another example, the outer contour of the central optical zone 210 is circular, the outer contour of the 1-step bending zone 221 is elliptical, and the outer contour of the 0-step bending zone 222 is shell-shaped; alternatively, for example, the outer contour of the central optical zone 210 is an ellipse, the outer contour of the 1-step bending region 221 is a circle, and the outer contour of the 0-step bending region 222 is a hexagon; and so on not described.
The outer contours of the central optical zone 210, the 1 st-order light bending region 221, and the 0 th-order light bending region 222 may be the same. For example, the outer contours of the central optical zone 210, the 1 st-order light bending zone 221, and the 0 th-order light bending zone 222 are all circular; alternatively, the outer contour lines of the central optical zone 210, the 1 st-order light bending zone 221, and the 0 th-order light bending zone 222 are all elliptical; and so on not described.
Example 1
Fig. 13 is a schematic view of an optical lens in embodiment 1 of the present invention; fig. 14 is a graph showing the change in refractive power of the optical lens of fig. 13. The lens of embodiment 1 of the present invention is useful for vision correction and retardation of myopia progression in 500 degree myopic wearers. As shown in fig. 13, the ring width ratio of the 1 st order light refraction region 221 to the 0 th order light refraction region 222 is 1: 1. The power change is shown in figure 14. The basic parameter information of the lens is shown in Table 1-1, and the distribution of each zone shown in this embodiment 1 is shown in Table 1-2 (for the sake of brevity, the central optical zone 210, the 1 st dioptric zone 221, the 0 th dioptric zone 222, and the peripheral optical zones are respectively abbreviated as central, 1 st, 0 th, peripheral, and the same below). The radius of curvature of the back surface of the lens is constant, the change of the refractive power of each region is realized by the change of the surface type of the front surface, and the refractive power of each 1-step refractive region 221 is constantly distributed from the center to the outside along the radial direction.
In addition, in the lens of example 1, the joints of the 1 st dioptric zone 221 and the central optical zone 210 and the adjacent 0 th dioptric zone 222 are connected by aspheric rounded corners, and accordingly, the refractive power of the joint position is shown as the position a in fig. 14, so that the refractive power transition at the joints of the zones is smooth, and the poor visual quality is reduced. At this point, the power may be characterized by the average power within a single zone.
Table 1-1 basic lens parameters for example 1
Tables 1-2 Each zone of the lens of example 1
Example 2
Fig. 15 is a schematic view of an optical lens in embodiment 2 of the present invention; fig. 16 is a graph showing the change in refractive power of the optical lens of fig. 15. The lens of example 2 is useful for vision correction and retardation of myopia progression in a wearer with 800 degrees myopia. As shown in fig. 15 and 16, the ring width ratio of the 1 st order light refraction region 221 to the 0 th order light refraction region 222 is 1: 1. The power change is shown in figure 16. The basic parameter information of the lens is shown in the table 2-1, and the distribution of each area is shown in the table 2-2. The radius of curvature of the front surface of the lens is constant, and the refractive power of each zone is changed through the change of the surface type of the back surface. In this embodiment, there is no peripheral region, and the power of each 1 st-order dioptric region 221 is distributed from the center radially outward in the following trend: increasing-decreasing alternation.
Table 2-1 basic lens parameters for example 2
| DIA(mm) | CT(mm) | Ra(mm) | Rp(mm) | | IR | 1 st |
|
| 75 | 1.3 | 825.373 | 63.747 (center) | Resin composition | 1.56 | 2243.1mm 2 |
Table 2-2 each zone of the lens of example 2
Example 3
Fig. 17 is a schematic view of an optical lens in embodiment 3 of the present invention; fig. 18 is a graph showing the change in refractive power of the optical lens of fig. 17. Embodiment 3 in, the lens can be used for the vision correction of 1000 degrees myopes and delay the myopic development. As shown in FIGS. 17 and 18, the basic parameters of the optical lens in example 3 are shown in Table 3-1, and the distribution of the zones is shown in Table 3-2. The radius of curvature of the back surface is constant in this embodiment, and the refractive power variation is achieved with a change in the front surface profile. In this embodiment, there is no peripheral region, and the refractive power of each 1 st-order dioptric region 221 gradually decreases from the center toward the outside in the radial direction.
Table 3-1 basic lens parameters for example 3
Table 3-2 each zone of the lens of example 3
| Position of | Center of a | Ring | 1 | |
|
| Region setting | Center (C) | |
|
|
|
| Refractive power/D | -10.0 | 0 | -10.0 | -9.5 | |
| ΔD(D) | \ | 10 | 0 | 0.5 | |
| diameter/Ring Width (mm) | 5 | 6 | 5.5 | 6 | |
| Rear surface Δ h (mm) | \ | 2.55E-3 | 0 | 5.19E-2 |
Example 4
Fig. 19 is a schematic view of an optical lens in embodiment 4 of the present invention; fig. 20 is a graph showing the change in refractive power of the optical lens of fig. 19. The embodiment 4 of the utility model provides a lens is used for the myopia prevention and control of non-myopic patient's wearer. As shown in FIGS. 19 and 20, the basic parameters of the optical lens of example 4 are shown in Table 4-1, and the distribution of each zone is shown in Table 4-2. In this embodiment 4, the refractive power and the ring width of each 1-step refractive region 221 are different, wherein the ring width of each 1-step refractive region 221 gradually increases from the center to the outside in the radial direction, and the refractive power of each 1-step refractive region 221 gradually increases from the center to the outside in the radial direction.
Table 4-1 basic lens parameters for example 4
Table 4-2 each zone of the lens of example 4
Example 5
Fig. 21 is a schematic view of an optical lens in embodiment 5 of the present invention; fig. 22 is a graph showing the change in refractive power of the optical lens of fig. 21. The utility model discloses in embodiment 5 the lens is used for +1.0D person of wearing presbyopia to correct to provide certain depth of field, satisfy its look far away, look near demand. As shown in FIGS. 21 and 22, the basic parameters of the optical lens in example 5 are shown in Table 5-1, and the distribution of each region is shown in Table 5-2. The front surface of this embodiment has a constant radius of curvature and changes in refractive power with changes in the back surface profile. In this embodiment 5, the refractive power and the ring width of each 0-step refractive region 222 are the same, and the refractive power of each 1-step refractive region 221 changes from the center radially outward in a trend of decreasing first and then increasing.
Table 5-1 basic lens parameters for example 5
Table 5-2 each zone of the lens of example 5
| Position of | Center (C) | |
|
|
|
|
|
Ring 7 | |
|
|
| Region setting | Center (C) | |
|
|
|
|
|
|
|
|
Periphery of |
| Refractive power/D | 1.0 | 0.5 | 1.0 | -0.5 | 1.0 | -1.5 | 1.0 | -0.5 | 1.0 | 0.5 | 1.0 |
| ΔD(D) | \ | -0.5 | 0 | -1.5 | 0 | -2.5 | 0 | -1.5 | 0 | -0.5 | 0 |
| diameter/Ring Width (mm) | 10 | 1.5 | 1 | 1.5 | 2 | 1.5 | 2 | 1.5 | 1 | 1.5 | 21.5 |
| Rear surface Δ h (mm) | \ | 1.71E-4 | 0 | 1.21 |
0 | 2.03 |
0 | 1.21 |
0 | 1.71 |
0 |
Example 6
Fig. 23 is a schematic view of an optical lens in embodiment 6 of the present invention; fig. 24 is a graph showing the change in refractive power of the optical lens of fig. 23. The embodiment 6 of the utility model provides a be used for 300 degrees myopia patients' vision correction to delay its myopia development. As shown in FIGS. 23 and 24, the basic parameters of the optical lens in example 6 are shown in Table 6-1, and the distribution of each region is shown in Table 6-2. The front surface of this embodiment has a constant radius of curvature and changes in refractive power with changes in the back surface profile. In this embodiment 6, the ring widths of the 0-step dioptric regions 222 are different, the ring width of each 1-step dioptric region 221 has a trend that the ring width increases from the center to the outside in the radial direction and then decreases, and the refractive power and the ring width of each 1-step dioptric region 221 increase from the center to the outside in the radial direction and then decrease.
Table 6-1 basic lens parameters for example 6
Table 6-2 each zone of the lens of example 6
| Position of | Center of a | Ring | 1 | |
|
|
|
|
Ring 7 | |
|
|
Ring 11 | |
| Region setting | Center (C) | |
|
|
|
|
|
|
|
|
|
|
Periphery of | |
| Refractive power/D | -3.0 | -2.0 | -3.0 | -1.0 | -3.0 | 0 | -3.0 | 1.0 | -3.0 | 0.5 | -3.0 | -2.0 | -3.0 | |
| ΔD(D) | \ | 1.0 | 0 | 2.0 | 0 | 3.0 | 0 | 4.0 | 0 | 3.5 | 0 | 1.0 | 0 | |
| diameter/Ring Width (mm) | 7 | 1 | 3 | 2 | 1 | 2 | 3 | 3 | 3 | 1 | 3 | 1 | 9.5 | |
| Rear surface Δ h (mm) | \ | 1.39E-4 | 0 | 1.12 |
0 | 1.68 |
0 | 6.00 |
0 | 4.89 |
0 | 1.39 |
0 |
It should be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present application has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the spirit and scope of the present invention.
Claims (27)
1. An optical lens, characterized in that the lens comprises a central optical zone and an intermediate optical zone distributed radially outwards from the center,
the intermediate peripheral optic zone has 1-step dioptric zones having a refractive power different from that of the central optic zone and 0-step dioptric zones having a refractive power equivalent to that of the central optic zone, and the 1-step dioptric zones and the 0-step dioptric zones are arranged in concentric rings alternately arranged in the radial direction.
2. The lens of claim 1, wherein the mean sagittal height difference Δ h for the 1 st refractive zone relative to the equivalent central optical zone profile is from (1.0E "6) mm to 10mm, or from (2.0E" 4) mm to (5.5E "3) mm, or from (2.0E" 3) mm to (3.5E "3) mm.
3. The lens according to claim 1, characterized in that the number of 1-order dioptric zones is greater than 1.
4. The lens of claim 1, wherein the difference Δ D between the refractive power of the 1 st refractive zone and the refractive power of the central optic zone is greater than zero, alternatively 0.5-10.0D, alternatively 2.5-5.0D.
5. The lens according to claim 1, characterized in that the power of each 1 st order dioptric region is distributed radially outwards from the center with the trend: constant, or gradually increasing, or gradually decreasing, or increasing first and then decreasing, or decreasing first and then increasing, or alternately increasing and decreasing.
6. The lens according to claim 1, wherein the junction of the 1 st order dioptric region and the central optical region and/or the 0 th order dioptric region is aspheric, so that the power variation of two adjacent regions is continuous.
7. The lens according to claim 1, wherein the ratio of the area of the 1 st order dioptric region on the middle optical zone is 20% to 100%, or 45% to 55%.
8. The lens according to claim 1, wherein the ring width of the single 1 st order dioptric region is 0.1-30 mm, or 0.5-3.0 mm, or 1.0-2.0 mm.
9. The lens according to claim 1, wherein the ring width of the single 1 st order dioptric region is not less than 1 mm.
10. The lens according to claim 1, wherein the ratio of the ring width of the adjacent 1 st order light refraction region to the 0 th order light refraction region is 1:10 to 10:1, or 1:3 to 3:1, or 1: 1.
11. The lens according to claim 1, characterized in that the refractive power and/or the ring width of each of the 1 st order dioptric regions are the same.
12. The lens according to claim 1, characterized in that the refractive power and/or the ring width of each of the 1 st order dioptric regions are different.
13. The lens according to claim 1, wherein the ring width of each of the 1 st order dioptric regions is distributed radially outward from the center with a tendency: constant, or gradually increasing, or gradually decreasing, or increasing first and then decreasing, or decreasing first and then increasing, or alternately increasing and decreasing.
14. The lens of claim 1, wherein the ring width of each of the 0 th order dioptric regions is different.
15. The lens according to claim 1, wherein the ring width of each 0 th order dioptric region is distributed from the center radially outwards with a trend of: constant, or gradually increasing, or gradually decreasing, or increasing first and then decreasing, or decreasing first and then increasing, or alternately increasing and decreasing.
16. The lens of claim 1, wherein the difference Δ D between the power of the 1 st order dioptric zone and the power of the central optic zone is less than zero.
17. The lens according to any one of claims 1 to 16, wherein the number of the 1-stage bending regions is 2 to 50, or 3 to 30, or 4 to 15.
18. The lens according to any one of claims 1 to 16, wherein the number of 0 th-order bending regions is 1 to 50, or 2 to 30, or 4 to 10.
19. The lens according to any one of claims 1 to 16 wherein the change in refractive power of the 1 st refractive zone relative to the central optic zone is achieved by a change in the profile of the posterior or anterior surface of the lens.
20. The lens according to any one of claims 1 to 16 wherein the power change of the central optical zone, the 1 st order dioptric zone, the 0 th order dioptric zone is achieved by a change of material.
21. The lens of any one of claims 1 to 16, wherein the outer contours of the central optical zone, the 1 st-order dioptric zone and the 0 th-order dioptric zone are closed figures, and the closed figures are one of a circle, an ellipse, a shell, a hexagon and a clover.
22. The lens of any one of claims 1 to 16, wherein at least two of the central optical zone, the 1 st dioptric zone and the 0 th dioptric zone have different outer profiles.
23. The lens of any one of claims 1 to 16, wherein the outer contours of the central optical zone, the 1 st order refractive zone and the 0 th order refractive zone are the same.
24. The lens according to any one of claims 1 to 16, wherein the widths of the 1 st order refraction region and the 0 th order refraction region in any direction perpendicular to the optical axis plane are larger than 0 and are not 0 or close to 0 when viewed along the optical axis direction of the lens.
25. The lens according to any one of claims 1 to 16, characterized in that the lens is made of a light permeable material with a refractive index of 1.5 to 1.8.
26. The lens of any one of claims 1 to 16, wherein the central optical zone is 3 to 30mm in diameter, or 5 to 15mm, or 9 to 12mm in diameter; the ring width of the middle optical zone is 5-40 mm, or 10-20 mm.
27. The lens of any one of claims 1 to 16, further comprising a peripheral optic zone of power equivalent to the central optic zone, the peripheral optic zone being radially outward of the intermediate optic zone.
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|---|---|---|---|
| CN202220252267.XU CN217112923U (en) | 2022-01-30 | 2022-01-30 | Optical lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220252267.XU CN217112923U (en) | 2022-01-30 | 2022-01-30 | Optical lens |
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| Publication Number | Publication Date |
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| CN217112923U true CN217112923U (en) | 2022-08-02 |
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|---|---|---|---|
| CN202220252267.XU Active CN217112923U (en) | 2022-01-30 | 2022-01-30 | Optical lens |
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| Country | Link |
|---|---|
| CN (1) | CN217112923U (en) |
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