CN118276341A - Pattern defocusing soft contact lens and manufacturing method thereof - Google Patents

Abstract

The invention discloses a pattern defocusing soft contact lens and a manufacturing method thereof, and relates to the technical field of contact lenses. The invention can improve the myopia prevention and control effect of children and teenagers.

Description

Pattern defocusing soft contact lens and manufacturing method thereof

Technical Field

The invention relates to the technical field of contact lenses, in particular to a pattern defocusing soft contact lens and a manufacturing method thereof.

Background

Myopia is the most frequent refractive error. At present, the number of the global myopic patients is up to 25 hundred million, the total myopia rate of children and teenagers is up to 53.6%, and the tendency of high-incidence, low-age and severe myopia of primary and middle school students is obvious. Therefore, the development progress of myopia is effectively controlled, and the prevention and delay of the development of myopia to a high degree are key works of myopia prevention and control of children and teenagers, which are helpful for realizing the obvious reduction of the new myopia rate of the children and teenagers and the obvious improvement of the whole vision level.

From the clinical effect, the effective rate of the existing out-of-focus soft lens intervention is only about 60%, and the method is based on a Gaussian imaging formula:

wherein f is focal length, u is object distance, v is image distance;

When the object distance u is changed, the image distance v is also changed, so that the image distance, namely the defocus amount, obtained by a wearer is changed and unstable, meanwhile, a soft lens adopting a peripheral defocus method only can passively influence retina, but patterns and images generated on the peripheral retina are changed, and the defocus efficiency is very low. Based on the above, it is urgently required to design a soft lens product with defocused pattern, and the defocusing principle is that the defocused pattern for myopia is positioned in front of the peripheral retina by active defocusing, fixed pattern and defocusing amount, so as to control the growth of the eye axis and greatly improve the myopia prevention and control effect.

Disclosure of Invention

The invention aims to provide a pattern defocusing soft contact lens and a manufacturing method thereof, which are used for solving the problems in the prior art and greatly improving the myopia prevention and control effects of children and teenagers.

In order to achieve the above object, the present invention provides the following solutions:

The invention provides a pattern defocused soft contact lens which comprises a protective layer, a pattern layer and a degree layer, wherein the pattern layer is positioned between the protective layer and the degree layer, the protective layer is used for contacting a cornea, a plurality of lenses are arranged on the protective layer, the lenses are arranged around the center of the protective layer, the diameter of an annular shape where the lenses are positioned is 2mm-5mm, and the positions of each pattern on the pattern layer are in one-to-one correspondence with the positions of each lens.

Preferably, the thickness of the protective layer is 4-20 μm, the lens is a bulge on the protective layer, the diameter of the lens is 0.5-2 mm, and the sagittal height of the lens is 2-20 μm.

Preferably, a plurality of lenses enclose a ring shape to form at least one, and the diameter of the ring shape of the innermost layer is 3mm.

Preferably, the lenses on the protective layer are two symmetrically arranged, and the patterns on the pattern layer are two symmetrically arranged.

Preferably, the number of the lenses on the protective layer is eight, and the number of the patterns on the pattern layer is eight.

Preferably, the pattern on the pattern layer is "+".

Preferably, the pattern on the pattern layer is "v".

Preferably, the pattern on the pattern layer is formed by luminescent material or non-luminescent ink.

Preferably, the power layer is a silicone hydrogel or a hydrogel soft contact lens.

The invention also provides a manufacturing method of the pattern defocusing soft contact lens, which is used for manufacturing the pattern defocusing soft contact lens according to any one of the technical schemes, and comprises the following steps:

S1, manufacturing a silica gel mold by using a metal mold with a plurality of bulges on the upper surface, and forming a plurality of concave parts on the surface of the silica gel mold, wherein the concave parts correspond to the bulges;

S2, adsorbing the silica gel mold on an operation table through negative pressure, and pad printing raw materials of a protective layer on the silica gel mold to form the protective layer with a plurality of lenses on the surface, wherein the positions of the lenses and the concave parts correspond;

S3, manufacturing a template corresponding to the pattern on the pattern layer by using a photoetching machine, forming the pattern layer on the protective layer by using a transfer printing mode of luminescent materials or non-luminescent ink, wherein each lens corresponds to a pattern;

S4, embedding the soft lens with the degree into the silica gel mold, injecting silicon hydrogel to form the degree layer, and then drying, baking, sterilizing and hydrating to finally form the pattern defocused soft contact lens.

Compared with the prior art, the invention has the following technical effects:

According to the pattern defocusing soft contact lens and the manufacturing method thereof, the pattern layer is arranged between the protective layer and the degree layer, the protective layer is used for contacting with the cornea, the cornea is protected, luminescent materials or non-luminescent ink of the pattern layer are prevented from contacting with the cornea, the protective layer is provided with the plurality of lenses, the lens arrangement can play a role in focusing, in addition, the diopter change can be realized by changing the sagittal height of the lenses, the lens arrangement is further suitable for people with different degrees, the lenses are arranged around the center of the protective layer, the annular diameter of the plurality of lenses is 2mm-5mm, the lenses and the patterns are arranged on the periphery of the crystal, when external light irradiates the pattern defocusing soft contact lens, the patterns on the pattern layer are beaten to the retina from the periphery of the crystal through the lenses, the patterns are unclear, the brain receives signals and controls the relaxation of ciliary muscle, the patterns have the trend of making the patterns beaten to the retina, the patterns clear, in the process, the patterns influence the periphery of the crystal deformation, the peripheral ciliary muscle is relaxed, peripheral active defocusing can be realized, the effect of preventing myopia after long-term relaxation can be realized, the positions of the patterns on the pattern layer are in one-to-one correspondence with the positions of the lenses, the positions of the patterns and the positions of the patterns can be respectively controlled by changing the positions and the positions of the patterns.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of a pattern defocus soft contact lens of a first embodiment;

FIG. 2 is a schematic diagram of a patterned layer for treating myopia and having a pattern of "+" according to the first embodiment;

FIG. 3 is a schematic view showing the structure of a patterned layer for treating myopia and having a pattern of 'V';

FIG. 4 is a schematic diagram of a pattern layer for treating astigmatism and having a "+" pattern, wherein the line between the two patterns is the axis of astigmatism of the patient;

FIG. 5 is an imaging schematic of a pattern defocus soft contact lens of the first embodiment;

FIG. 6 is a schematic diagram of the treatment of a patterned defocused soft contact lens in accordance with one embodiment;

FIG. 7 is an imaging schematic at the retina of FIG. 6;

FIG. 8 is a schematic view of a pattern defocus soft contact lens of an embodiment for stimulating ciliary muscle;

Fig. 9 is a front view of a silicone mold in the second embodiment;

FIG. 10 is a top view of a silicone mold in a second embodiment;

FIG. 11 is a comparative view of the anterior and posterior ciliary muscles and zonules for myopia accommodation;

FIG. 12 is a corneal topography of a user wearing a soft contact lens with a pattern defocus embodiment one;

FIG. 13 is a schematic illustration of a sizing of the defocus ring of the corneal topography of FIG. 12;

FIG. 14 is a schematic view of a pattern defocused soft contact lens under a microscope in accordance with a first embodiment;

in the figure: 100-pattern defocus soft contact lens, 200-retina, 300-external light, 400-longitudinal muscle, 500-circus muscle, 1-degree layer, 2-pattern layer, 3-protective layer, 4-pattern, 5-lens, 6-silica gel mold, 7-concave part.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention aims to provide a pattern defocusing soft contact lens and a manufacturing method thereof, which are used for solving the problems in the prior art and greatly improving the myopia prevention and control effects of children and teenagers.

In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.

Example 1

As shown in fig. 1-8, the present embodiment provides a pattern defocused soft contact lens 100, which is mainly suitable for people with 6-15 years old and immature sclera, and comprises a protective layer 3, a pattern layer 2 and a degree layer 1, wherein the pattern layer 2 is located between the protective layer 3 and the degree layer 1, and the protective layer 3 is used for contacting cornea, protecting cornea, and preventing luminescent material or non-luminescent ink of the pattern layer 2 from contacting cornea, wherein the molecular formula of the luminescent material is SrAl ₂O₄: eu to (2+), dy- (3+), wherein the main components are strontium carbonate (content 55% -60%), aluminum oxide (content 36% -42%), dysprosium oxide (content 1.5% -2.5%) and europium oxide (content 1.0% -2.0%), a plurality of lenses 5 are arranged on the protective layer 3, the arrangement of the lenses 5 can play a focusing effect, and the diopter can be changed by changing the sagittal height of the lenses 5, so that the lenses 5 are suitable for people with different degrees to use, the lenses 5 are arranged around the center of the protective layer 3, the annular diameters of the lenses 5 are 2mm-5mm, the lenses 5 and the patterns 4 are arranged on the periphery of the crystal, the structural characteristics of a non-suspension and an acyclic muscle in the middle of a human eye crystal are met, as shown in figures 5-7, when external light 300 irradiates the pattern defocused soft contact lens 100, the pattern 4 on the pattern layer 2 is not clear before striking the retina 200 from the periphery of the lens 5, taking the lens 5 around +4d as an example, which images around 1mm in front of the peripheral retina 200, forming the pattern 4 as shown in fig. 7 in front of the retina 200, forming a sector area around 15 degrees with the center of the retina 200 on both sides of the pattern 4, when the brain receives an unclear image signal, stimulating the annular muscle 500 and the longitudinal muscle 400 of the ciliary muscle to relax, as shown in fig. 8, leaving the peripheral lens concave, relieving the centripetal force loaded on the sclera, thereby making the pattern 4 image towards the retina 200, and the pattern 4 clear, in this process, the pattern 4 affects the deformation of the periphery of the lens, relaxing the peripheral ciliary muscle, realizing peripheral active defocus, and after long-term relaxation, can realize the effect of preventing myopia, the positions of the patterns 4 on the pattern layer 2 correspond to the positions of the lenses 5 one by one, and the number and positions of the patterns 4 can be changed to be suitable for myopia control and astigmatism treatment respectively.

Specifically, the thickness of the protective layer 3 is 4 μm-20 μm, the lens 5 is a protrusion on the protective layer 3, the diameter of the lens 5 is 0.5mm-2mm, the sagittal height of the lens 5 is 2 μm-20 μm, preferably 2mm, and in the actual production and manufacturing process, a person skilled in the art can adjust the sagittal height of the lens 5 according to the actual myopia degree of the user, so as to realize different diopters, and further satisfy the crowd of different myopia degrees.

The number of the rings formed by the plurality of lenses 5 is at least one, namely, the number of the rings can be 1-n, the diameter of the ring of the innermost layer is 3mm, and the size of the ring can be adjusted according to actual needs by a person skilled in the art.

As shown in fig. 4, when the lens 5 on the protective layer 3 is two symmetrically disposed and the pattern 4 on the pattern layer 2 is two symmetrically disposed, that is, one pattern 4 is disposed on the left and right sides of the axial direction of astigmatism of the wearer, so that it is possible to place the pattern 4 in the axial direction and stimulate the axial ciliary muscle to relax for a long period of time until the astigmatism disappears.

As shown in fig. 2 to 3, when the lens is used for treating near vision, the number of lenses 5 on the protective layer 3 is eight, and the number of patterns 4 on the pattern layer 2 is eight, and the eight patterns 4 are enclosed into a ring shape to relax ciliary muscles around the periphery of the lens. The number of patterns 4 and the number of turns of the formed ring can also be adjusted by a person skilled in the art, and when the number of the formed ring is plural, the plural rings are sleeved in turn.

As shown in fig. 2 and 4, the pattern 4 on the pattern layer 2 is "+" in which the line width is 0.1mm and the line length is 0.8mm.

As shown in fig. 3, the pattern 4 on the pattern layer 2 is "v". Other patterns 4 than the above-described patterns 4 may be used by those skilled in the art as long as the use requirements can be satisfied.

The pattern 4 on the pattern layer 2 is formed of a luminescent material or a non-luminescent ink, and the non-luminescent ink is preferable for ensuring the safety of use.

The power layer 1 is a silicone hydrogel or hydrogel soft contact lens.

For the treatment principle corresponding to the present embodiment, according to the gaussian imaging formula:

wherein f is focal length, u is object distance, v is image distance;

When the object distance u is changed, the image distance v is changed, so that the image distance, namely the defocus amount, obtained by a wearer is changed and unstable, and if a proper pattern 4 is added into the pattern defocus soft contact lens 100, the pattern 4 acts on the front 1mm of the peripheral retina 200 through the lens 5, namely the defocus amount is about +3D, so that the fixed and permanent defocus amount is obtained, and the defocus amount of the peripheral defocus pattern plays an optimal focusing effect on the retina 200. If the material of the pattern 4 is a luminescent material, such as noctilucent powder or other light-accumulating material, the luminescent material absorbs light when there is natural light 300, and the light of the luminescent material is weak, when the wearer blinks, the luminescent material emits light in a closed eye state, the wearer can feel the peripheral bright light by himself, the effect of supplementing light to the peripheral retina 200 is achieved, irradiance of the retina 200 is increased, and the vein film is thickened.

The detectability of this embodiment is that, in the practical application process, the doctor can observe the pattern 4 reflected by the vitreous body in front of the peripheral retina 200 by the defocus pattern under the slit light through the three-sided mirror or the retinoscope, and can also determine the distance between the pattern 4 and the retina 200, which provides the basis for clinical activity.

The adjustability of the present embodiment is that the distance between the pattern 4 and the retina 200 can be adjusted by setting the sagittal height of the lens 5, so that a series of gradient pattern defocus soft contact lenses 100 can be produced to adapt to patients with different myopia degrees, and the effect is better with smaller age.

Example two

The present embodiment provides a method for manufacturing a pattern defocus soft contact lens, which is used for manufacturing a pattern defocus soft contact lens 100 in the first embodiment, and comprises the following steps:

S1, manufacturing a silica gel mold 6 by using a metal mold with a plurality of bulges on the upper surface, and forming a plurality of concave parts 7 on the surface of the silica gel mold 6, wherein the concave parts 7 correspond to the bulges, namely, the concave parts 7 are formed by bulges, as shown in fig. 9-10;

S2, adsorbing a silica gel mold 6 on an operation table through negative pressure, and pad printing raw materials of the protective layer 3 on the silica gel mold 6 to form the protective layer 3 with a plurality of lenses 5 on the surface, wherein each lens 5 corresponds to the position of each concave part 7, namely, the lens 5 is formed by the concave parts 7, and the sagittal height of the lens 5 depends on the depth of the concave parts 7;

S3, manufacturing a template corresponding to the pattern 4 on the pattern layer 2 by using a photoetching machine, forming the pattern layer 2 on the protective layer 3 by using a transfer printing mode of luminescent materials or non-luminescent ink, wherein each lens 5 corresponds to one pattern 4;

S4, embedding the soft lens with the degree into a silica gel mold 6, injecting the soft lens with the degree into a silica gel mold to form a degree layer 1, and then performing processes such as drying, baking, disinfection, hydration and the like to finally form the pattern defocused soft contact lens 100, wherein the formed pattern defocused soft contact lens 100 is shown in a microscope as shown in fig. 14.

As shown in fig. 12, a user is wearing the pattern defocus soft contact lens 100 with a defocus ring formed at the middle 3mm of the corneal topography, and the defocus ring is sized as shown in fig. 13.

The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.

Claims (10)

1. A soft contact lens with pattern defocus, characterized in that: the lens comprises a protective layer, a pattern layer and a degree layer, wherein the pattern layer is positioned between the protective layer and the degree layer, the protective layer is used for contacting with a cornea, a plurality of lenses are arranged on the protective layer, the lenses surround the center of the protective layer, the diameter of the ring where the lenses are positioned is 2mm-5mm, and the positions of each pattern on the pattern layer correspond to the positions of each lens one by one.

2. The pattern defocus soft contact lens of claim 1, wherein: the thickness of the protective layer is 4-20 mu m, the lens is a bulge on the protective layer, the diameter of the lens is 0.5-2 mm, and the sagittal height of the lens is 2-20 mu m.

3. The pattern defocus soft contact lens of claim 1, wherein: the annular shape surrounded by a plurality of lenses is at least one, and the diameter of the annular shape of the innermost layer is 3mm.

4. The pattern defocus soft contact lens of claim 1, wherein: the lenses on the protective layer are two symmetrically arranged, and the patterns on the pattern layer are two symmetrically arranged.

5. The pattern defocus soft contact lens of claim 1, wherein: the number of the lenses on the protective layer is eight, and the number of the patterns on the pattern layer is eight.

6. The pattern defocus soft contact lens of claim 1, wherein: the pattern on the pattern layer is "+".

7. The pattern defocus soft contact lens of claim 1, wherein: the pattern on the pattern layer is 'v'.

8. The pattern defocus soft contact lens of claim 1, wherein: the pattern on the pattern layer is formed by luminescent material or non-luminescent ink.

9. The pattern defocus soft contact lens of claim 1, wherein: the power layer is a silicone hydrogel or a hydrogel soft contact lens.

10. A method for manufacturing a pattern defocused soft contact lens, which is characterized by comprising the following steps: a method for making the pattern defocus soft contact lens of any one of claims 1-9, comprising the steps of:

S1, manufacturing a silica gel mold by using a metal mold with a plurality of bulges on the upper surface, and forming a plurality of concave parts on the surface of the silica gel mold, wherein the concave parts correspond to the bulges;

S2, adsorbing the silica gel mold on an operation table through negative pressure, and pad printing raw materials of a protective layer on the silica gel mold to form the protective layer with a plurality of lenses on the surface, wherein the positions of the lenses and the concave parts correspond;

S3, manufacturing a template corresponding to the pattern on the pattern layer by using a photoetching machine, forming the pattern layer on the protective layer by using a transfer printing mode of luminescent materials or non-luminescent ink, wherein each lens corresponds to a pattern;

S4, embedding the soft lens with the degree into the silica gel mold, injecting silicon hydrogel to form the degree layer, and then drying, baking, sterilizing and hydrating to finally form the pattern defocused soft contact lens.