CN113514961A

CN113514961A - Continuous zooming contact lens with peripheral myopic defocus

Info

Publication number: CN113514961A
Application number: CN202110472429.0A
Authority: CN
Inventors: 萧旭贵
Original assignee: Shangyun Biotechnology Co ltd
Current assignee: Yu Ka Polytron Technologies Inc.
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2021-10-19
Anticipated expiration: 2041-04-29
Also published as: CN113514961B

Abstract

A continuous zooming contact lens with peripheral myopic defocus comprises an optical area formed by taking an assumed central optical axis as a circle center, diopter of the optical area is continuously changed by a circular area outside the assumed central optical axis, a first diopter of the optical area forms a corresponding first focal length, a second diopter of the optical area forms a corresponding second focal length, a depth of field range is a difference range between the first focal length and the second focal length, the quality of an image formed in the depth of field range is superior to the quality of an image formed outside the depth of field range, another circular area extending outwards from the optical area is arranged in a distance from the focal area, and diopter of the distance from the focal area is continuously changed from one side close to the optical area to one side far away from the optical area.

Description

Continuous zooming contact lens with peripheral myopic defocus

Technical Field

The present invention relates to contact lenses, and more particularly, to a contact lens with continuous zooming function for preventing and controlling myopia by defocusing peripheral myopia.

Background

In recent years, due to the fact that 3C products are too prevalent, more and more school children and even preschool children have myopia problems, the proportion of myopia of the children in the country and the whole world also has a phenomenon of rapid rising, if the myopia is not controlled and corrected, mild myopia can be continuously deepened to be high myopia, the high myopia can have a plurality of eye-related complications, and even more serious blindness can be caused.

Common myopia control and correction methods can be divided into two types, namely optical methods and non-optical methods, most of the non-optical methods currently use long-acting mydriatic agents in taiwan and wear night corneal plastic tablets, the mydriatic agents are economical and effective, unfortunately, after the mydriatic agents are used, eyes are severely photophobic, the eyes often need to be squinted outdoors, the mydriatic agents at the beginning point are difficult to see, some students even have the defects of difficult focusing and writing, and the like, but wearing the corneal plastic tablets has the defects that the cost of lenses, disinfectant and diagnosis is high, and foreign body sensation is obviously difficult to adapt at the initial stage of wearing because the corneal plastic tablets are hard materials, and besides the defects, if the wearer does not really disinfect the corneal plastic tablets, the risk of eyeball infection is greatly increased.

Therefore, it is the primary objective of the present invention to solve the above problems.

Disclosure of Invention

The main object of the present invention is to provide a continuous variable focus contact lens with peripheral myopic defocus, which has the effects of relieving the eye pressure and controlling the increase of myopic degree.

To achieve the aforesaid objective, the present invention provides a continuous-zoom contact lens with peripheral myopic defocus, which includes an optical zone, a circular zone formed by using an assumed central optical axis as a center of a circle, the diopter of the optical zone continuously changes from the circular zone outside the assumed central optical axis, a first diopter of the optical zone forms a corresponding first focal length, and a second diopter of the optical zone forms a corresponding second focal length.

And the depth of field range is the difference range between the first focal length and the second focal length, and the quality of an image formed in the depth of field range is superior to that formed outside the depth of field range. The defocusing area is another circular area extending outwards from the optical area, the diameter of the defocusing area is larger than that of the optical area, and the diopter of the defocusing area is continuously changed from the side close to the optical area to the side far away from the optical area.

Preferably, the ADD of the depth of field range is in a range between 0.25 and 4.0D.

Preferably, the focal length within the depth of field range continuously increases or continuously decreases from the first focal length to the second focal length.

Preferably, the focal length within the depth of field is gradually decreased and then gradually increased from the first focal length to the second focal length.

Preferably, the focal length within the depth of field is gradually increased and then gradually decreased from the first focal length to the second focal length.

Preferably, the refractive power of the out-of-focus area gradually increases and then gradually decreases from the inner side to the outer side of the other circular area.

Preferably, the ADD of the defocus region is in the range between 1.0 and 11.0D.

Preferably, the ADD of the defocus area is 4.0D when the first diopter is in the range between 0.0D and-4.0D.

Preferably, the first refractive power is in a proportional trend with the ADD of the out-of-focus area when the first refractive power is in a range between-4.0D and-10.0D.

Preferably, the maximum defocus amount of the defocus region is higher than + 0.0D.

The above objects and advantages of the present invention will be readily understood by the following detailed description of the selected embodiments and the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic plan view of a continuous variable focus contact lens of the present invention;

FIG. 2 is a schematic plan view of the optical zone and the depth of field according to the present invention;

FIG. 3 is a schematic diagram of an imaging mode of a myopic patient wearing a concave lens;

FIG. 4 is a schematic view of an imaging modality of the invention worn by a myopic patient;

figure 5 is a diopter profile of the first embodiment of the present invention;

figure 6 is a diopter profile of a second embodiment of the present invention;

figure 7 is a graph of the distribution of individual diopters of the present invention.

Wherein the continuous-zoom contact lens 1; an optical zone 10; a first diopter 11; a first focal length 111; a second refractive power 12; a second focal length 121; a depth of field range of 20; a decoking zone 30; assuming a central optical axis L.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1 and 2, a first embodiment of the present invention is shown for illustration purposes only and is not limited by the embodiments described herein.

The first embodiment of the present invention provides a continuous zoom contact lens 1 with peripheral myopic defocus, comprising an optical zone 10, a depth of field 20 and an out-of-focus zone 30, wherein:

the optical zone 10 is a circular area with a diameter of 0.5mm to 4mm surrounded by a center of the continuous variable focus contact lens 1 as a hypothetical central optical axis L. The radius of curvature (Base Curve) of the inner surface of the optical area 10 is between 8.0mm and 9.0mm, if the Base Curve of the lens is too large, the lens may not be attached to the eyeball and easily shift, and if the Base Curve of the lens is too small, the eye may easily feel uncomfortable, generally, the Base Curve of the lens is about 1.1 times of the Base Curve of the eyeball, in addition, in the present embodiment, the continuous zooming contact lens 1 is an optical system composed of a front Curve being an aspheric surface and a rear Curve being a single curvature, in other embodiments, the continuous zooming contact lens 1 may be an optical system composed of a front Curve being a single curvature and a rear Curve being an aspheric surface, or an optical system composed of a front Curve and a rear Curve being both aspheric surfaces, and all the above optical systems are within the protection scope of the present invention.

The equation of the aspherical optical system of the present invention is as follows:

z-the surface profile of a surface parallel to the optical axis,

s-the radial distance from the optical axis,

c is the reciprocal of curvature and radius,

k is a conic constant which is the constant of the cone,

a4, a6, A8 … are aspheric coefficients of 4 th, 6 th, 8 th …

When k is 0, the conical surface is a spherical surface; when k > -1, the conical surface is elliptical; when k is-1, the conical surface is a paraboloid; when k < -1, the conical surface is hyperboloid.

The continuous variable focus contact lens 1 of the aspherical optical system according to the present invention can be manufactured by a conventional manufacturing method, which can be roughly classified into three types: including lathing (lathing), Molding (Cast Molding), and spinning (Spin Molding).

The continuous variable focus contact lens 1 of the present invention may be made of: hydroxyethyl methacrylate (HEMA), Methyl Methacrylate (MMA), a copolymer of Methyl Methacrylate (MMA) and glycerol acrylate, a hydrophilic hydrogel, a hydrophobic silica hydrogel, to name but a few, are examples of materials that may be selected for use in the present invention.

The continuous variable focus contact lens 1 of the present invention is suitable for use with various types of soft contact lenses, such as: silica gel soft contact lenses, multifocal soft contact lenses, water-gradient soft contact lenses, light-diffusing soft contact lenses, water-gel soft contact lenses, blue-light filtering soft contact lenses, and colored soft contact lenses. The continuous variable focus contact lenses 1 of the present invention are suitable for use with a variety of hard contact lenses, such as: night wearing hard contact lenses, light scattering hard contact lenses, aspheric hard contact lenses and special hard contact lenses for keratoconus.

In the present embodiment, the diameter of the optical zone 10 is 0.5mm to 4mm, and the diameter of the optical zone 10 is not limited to the range of 0.5mm to 4mm in the actual structure design, and can be adjusted according to the imaging quality or the manufacturing technology. The diopter of the optical zone 10 continuously changes from the assumed optical axis L along the radial direction, and more specifically, the diopter of the optical zone 10 continuously increases from the assumed optical axis L along the radial direction, and the diopter of the optical zone 10 also continuously decreases from the assumed optical axis L along the radial direction, the setting of the trend can be adjusted according to the actual requirement of the wearer, and the setting of the trend also includes the initial diopter of the optical zone 10, for example, if the wearer is a hyperopic patient, the diopter suitable for the hyperopic patient should be used as the initial value.

Referring to fig. 2 again, the optical zone 10 has a first refractive power 11 at a position adjacent to the assumed central optical axis L, the first refractive power 11 forms a corresponding first focal length 111, the optical zone 10 has a second refractive power 12 at a position away from the assumed central optical axis L, the second refractive power 12 forms a corresponding second focal length 121, the first refractive power 11 is smaller than the second refractive power 12, so that the corresponding first focal length 111 is larger than the second focal length 121, the difference range between the first focal length 111 and the second focal length 121 forms the depth of field range 20, an image quality formed within the depth of field range 20 is better than an image quality formed outside the depth of field range 20, in other words, the depth of field range 20 has a correctable visual effect, the ADD of the depth of field range 20 is in a range between 0.25D and 4.0D, and it is particularly noted that, since the first refractive power 11 and the second refractive power 12 are in a continuously changing trend, therefore, the focal length variation within the depth-of-field range 20 formed by the first focal length 111 and the second focal length 121 is gradually changed.

When the wearer watches the objects with different distances, the brain of the wearer can judge the distance and select the most appropriate focal distance from the depth of field range 20, so that the objects can be accurately imaged on the retina of the wearer to generate clear visual images, more specifically, when the wearer stares at the objects with closer distances, the brain of the wearer can select the focal distance most suitable for looking at the objects from the depth of field range 20, so that the ciliary muscle of the wearer does not need to exert excessive force, the situation that the ciliary muscle is tensed and contracted for a long time is reduced, and the purpose of effectively relieving the eye pressure is achieved; when the wearer gazes at a target object with a long distance, the brain of the wearer can select the focal length most suitable for the object to be seen far from the depth of field range 20, so that the wearer can clearly see the target object with a long distance.

The continuous-zoom contact lens 1 provided by the present invention is also suitable for the wearer with reduced lens adjusting function, when the wearer with reduced lens adjusting function wants to see the object at a close distance, the focal length of the object can be selected from the depth of field range 20 through the brain of the wearer, so that the object can be accurately imaged on the retina of the wearer even if the curvature of the lens is not significantly changed for focusing, thereby generating a clear visual image.

The defocus area 30 is another circular area extending outward from the optical area 10, and is a circular area with a diameter of 4mm to 9mm surrounded by the assumed central optical axis L as the center of the circle, and when the actual structure is designed, the diameter of the defocus area 30 is not limited to the range of 4mm to 9mm, and can be adjusted according to the imaging quality or the manufacturing technology; the diopter of the defocus area 30 continuously changes from the inner side to the outer side of the circular area, and the ADD of the defocus area 30 ranges between 1.0D and 11.0D, and further, the diopter of the defocus area 30 gradually increases from the inner side to the outer side of the circular area and then gradually decreases, and the setting of the aforesaid trend and the ADD value of the defocus area 30 can be adjusted according to the actual requirement.

Referring to fig. 3 and 4, compared with the normal vision of the myope, the light entering the eyeball will be imaged in front of the retina due to the excessive diopter of the cornea or the longer axis of the eye of the myope, and the object can be imaged on the retina after being corrected by using the concave lens, i.e. the common myopic lens, but because the shape of the retina is not plane, the focus of the center of the corrective myopic lens falls on the retina, but the peripheral focus deviates to the rear of the retina (as shown in fig. 3), and because the eyeball of the human body has the characteristic of physiological autonomous regulation, the axis of the eye will be continuously lengthened and the myopic degree will be continuously increased in order to catch up the peripheral focus falling behind the retina, and the invention changes the peripheral optical design of the continuous zoom contact lens 1 through the defocusing area 30, and the light around the continuous zoom contact lens 1 enters the eyeball and then is imaged in front of the retina, to form a peripheral myopic defocus (as shown in figure 4) so as to reduce the risk of lengthening the axis of the eye.

Referring to fig. 5, in the present embodiment, the optical zone 10 is a circular zone with a diameter of 0.5mm to 4mm surrounded by the assumed central optical axis L as a center, and the defocus zone 30 is a circular zone with a diameter of 4mm to 9mm, wherein the circular zone with a diameter of 6mm to 7mm in the defocus zone 30 has the maximum defocus amount in the continuous zoom contact lens 1 with peripheral myopic defocus.

In the optical zone 10, the first diopter-6.00D is located at a distance from the assumed central optical axis L, the second diopter-5.00D is located at a distance from the assumed central optical axis L, the ADD of the depth of field range 20 is 1.0, and the diopter within the depth of field range 20 is in a continuously increasing trend from the first diopter 11 to the second diopter 12. When the wearer views the objects at different distances, the brain of the wearer can select the most appropriate diopter from (-5.00D to-6.00D) within the depth of field range 20, so that the object can be accurately imaged on the retina to generate clear visual images, and because the diopter within the depth of field range 20 is continuously increasing, the wearer can not generate dizzy discomfort due to the sharp change of diopter when viewing the near and far objects.

It should be noted that the optical area 10 extending outward to the defocus area 30 is designed to be progressive defocus, that is, the diopter from the optical area 10 to the defocus area 30 is continuously increasing, and the defocus area 30 has the maximum defocus amount, in this embodiment, the ADD of the defocus area 30 is 5.0D, the average diopter passing through the defocus area 30 is greater than the average diopter of the optical area 10, so as to generate myopic defocus, and allow the target object to be imaged in front of the peripheral range of the retina rather than behind the retina, so as to effectively solve the conventional problem of increasing diopter caused by eyeball focus tracking, and achieve the purpose of controlling myopic diopter.

Referring to fig. 6, in the present embodiment, the optical zone 10 is a circular zone with a diameter of 0.5mm to 4mm surrounded by the assumed central optical axis L as a center, and the defocus zone 30 is a circular zone with a diameter of 4mm to 9mm, wherein the circular zone with a diameter of 7mm to 8mm in the defocus zone 30 has the maximum defocus amount.

It should be noted that, the optical area 10 extending outward to the defocus area 30 is designed to be progressive defocus, that is, the diopter from the optical area 10 to the defocus area 30 tends to decrease and increase, and the defocus area 30 has the maximum defocus amount, in this embodiment, the ADD of the defocus area 30 is 5.0D, the average diopter passing through the defocus area 30 is greater than the average diopter of the optical area 10 to generate myopic defocus, so that the target can be imaged in front of the peripheral range of the retina rather than behind the retina, thereby effectively solving the problem of increasing diopter caused by the conventional eyeball focus tracking, and achieving the purpose of controlling myopic diopter.

Referring to fig. 7, there is shown a distribution diagram of the continuous variable focus contact lens 1 with peripheral myopic defocus for each diopter, as can be seen, the optical zone 10 is a circular area with a diameter of 0.5mm to 4mm surrounded by the assumed central optical axis L, the defocus zone 30 is a circular area with a diameter of 4mm to 9mm, wherein a circular area of 6mm to 7mm in the defocus area 30 has the largest defocus amount, it is worth particularly stating, when the first diopter 11 is 0.0D, -1.0D, -2.0D, -3.0D and-4.0D, the corresponding highest defocus positions (as the ordinate of fig. 7) are 4.5D, 3.5D, 2.5D, 1.5D and 0.5D, in other words, when the first diopter 11 is 0.0D, -1.0D, -2.0D, -3.0D, and-4.0D, the ADD of the defocus area 30 is 4.0D. When the first diopter 11 is-5.0D, -6.0D, -7.0D, -8.0D, -9.0D and-10.0D, the position of the highest defocus amount of the defocus area 30 (as the ordinate of the vertical axis of fig. 7) is 0.5D, in other words, when the first diopter 11 is in the range between-4.0D and-10.0D, the larger the first diopter 11 is, the larger the ADD of the defocus area 30 is, and in the actual structure design, the ADD value of the defocus area 30 is not limited to the above range, and can be adjusted according to the effect of myopia prevention and control or the manufacturing technique.

As can be seen from the above embodiments, the advantages of the present invention are summarized as follows: 1. by selecting the most appropriate focal length from within this depth of field range 20, the subject can be accurately imaged onto the wearer's retina to produce a clear visual image. 2. The diopter of the optical zone 10 is changed continuously, so that the wearer does not feel dizzy due to the sharp change of diopter during distance and near conversion. 3. With the design of the defocus area 30, the present invention has the advantages of relieving eyeball pressure and slowing down the increase of myopia degree.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A continuous-zoom contact lens with peripheral myopic defocus, comprising:

an optical zone, which is a circular zone formed by using an assumed central optical axis as a circle center, wherein diopter of the optical zone is continuously changed from the circular zone outside the assumed central optical axis, a first diopter of the optical zone forms a corresponding first focal length, and a second diopter of the optical zone forms a corresponding second focal length;

a depth of field range, which is a difference range between the first focal length and the second focal length, wherein the quality of an image formed in the depth of field range is superior to that formed outside the depth of field range;

the defocusing area is another circular area extending outwards from the optical area, the diameter of the defocusing area is larger than that of the optical area, and the diopter of the defocusing area is continuously changed from the side close to the optical area to the side far away from the optical area.

2. The progressive zoom contact lens with peripheral myopic defocus of claim 1, wherein the ADD of the depth of field range is in the range between 0.25 and 4.0D.

3. The progressive zoom contact lens with peripheral defocus of claim 1, wherein the focal length within the depth of field is continuously increasing or continuously decreasing from the first focal length to the second focal length.

4. The progressive zoom contact lens with peripheral defocus and myopia according to claim 1, wherein the focal length within the depth of field is gradually decreased from the first focal length to the second focal length and then gradually increased.

5. The progressive zoom contact lens with peripheral defocus of claim 1, wherein the focal length within the depth of field increases from the first focal length to the second focal length and decreases.

6. The progressive addition contact lens with peripheral defocus of claim 1, wherein the power of the defocus area increases gradually and decreases gradually from the inner side to the outer side of the other circular area.

7. The progressive zoom contact lens with peripheral defocus of claim 6, wherein the ADD of the defocus region ranges between 1.0 and 11.0D.

8. The progressive zoom contact lens of claim 7, wherein the ADD in the defocus region is 4.0D for a first refractive power in a range between 0.0D and-4.0D.

9. The progressive zoom contact lens with peripheral defocus of claim 7, wherein the first refractive power is in a direct trend with the ADD in the defocus region in a range between-4.0D and-10.0D.

10. Continuous variable focus contact lens with peripheral myopic defocus according to claim 8 or 9, wherein the most defocus position of the defocus region is above + 0.0D.