Contact lens with air permeable structure

Abstract

The utility model discloses a contact lens with a breathable structure, comprising a first film layer and a second film layer stacked together, wherein the second film layer is a lens layer, the second film layer has an inner side and an outer side opposite to each other, and the first film layer is connected to the outer side of the second film layer; the second film layer comprises a silicone hydrogel layer, and the silicone hydrogel layer has a plurality of oxygen permeable channels, and the oxygen permeable channels are connected to the first film layer. In the present application, an oxygen permeable channel is provided on the silicone hydrogel layer, and oxygen permeability is improved through the oxygen permeable channel, thereby improving the air permeability of the present solution.

Description

Technical Field

[0001] The present application relates to an optical lens, in particular to a contact lens with a gas permeable structure. Background Art

[0002] Contact lenses, also known as contact lenses, need to be worn by the user. Among them, the oxygen permeability and oxygen solubility of contact lenses are important indicators for judging the quality of contact lenses. People generally refer to the above oxygen permeability and oxygen solubility as the air permeability of contact lenses. When wearing contact lenses for a long time, contact lenses with poor air permeability usually cause dry eyes and discomfort to the user's eyes, so improvements are needed. Utility Model Content

[0003] The utility model discloses a contact lens with a ventilation structure, which solves the problem of poor ventilation of the existing contact lenses.

[0004] A contact lens with a breathable structure comprises a first film layer and a second film layer stacked together, wherein the second film layer is a lens layer, the second film layer has an inner side and an outer side opposite to each other, and the first film layer is connected to the outer side of the second film layer; the second film layer comprises a silicone hydrogel layer, the silicone hydrogel layer has a plurality of oxygen permeable channels, and the oxygen permeable channels are connected to the first film layer.

[0005] In the present application, an oxygen permeable channel is provided on the silicone hydrogel layer, and the oxygen permeability is improved through the oxygen permeable channel, thereby improving the air permeability of the present solution.

[0006] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0007] Optionally, the silicone hydrogel layer is divided into a first region, a second region, and a third region which are arranged in sequence from inside to outside along the radial direction, and the oxygen permeable channel is located in the second region.

[0008] Optionally, the thickness of the silicone hydrogel layer gradually decreases from the second area to the third area along the radial direction.

[0009] Optionally, diameters of the plurality of oxygen permeable channels distributed in the second region gradually decrease from inside to outside along the radial direction of the second region.

[0010] Optionally, the plurality of oxygen permeable channels form a plurality of scattered lines in the second region, and one end of the line is close to the first region, and the other end is close to the third region.

[0011] Optionally, a plurality of the oxygen permeable channels form a plurality of concentric circles in the second region.

[0012] Optionally, the oxygen permeable channel is silicone hydrogel, and the silicon content in the silicone hydrogel is higher than the silicon content in the silicone hydrogel layer.

[0013] Optionally, the cross-section of the oxygen permeable channel in the radial direction of the second membrane layer is circular.

[0014] The beneficial effects of this application are as follows:

[0015] 1. The present application sets an oxygen permeable channel on the second film layer, wherein the oxygen permeable channel adopts silicone hydrogel with a higher silicon content than the silicone hydrogel layer, which can improve oxygen permeability and oxygen solubility, thereby improving the overall air permeability of the contact lens and delaying the discomfort of users wearing for a long time;

[0016] 2. The present application gradually reduces the size of the oxygen permeable channel in the second region in the radial direction, which can adapt to the thickness of the contact lens that gradually decreases toward the edge, thereby reducing costs without affecting the air permeability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 An exploded view of this application;

[0018] Figure 2 This is a schematic diagram of the structure of the second film layer in this application.

[0019] The reference numerals in the figures are described as follows:

[0020] 1. First membrane layer; 2. Second membrane layer; 3. Silicone hydrogel layer; 4. Oxygen permeable channel; 5. First region; 6. Second region; 7. Third region. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] refer to Figure 1 In one embodiment, the present application discloses a contact lens with a breathable structure, comprising a first film layer 1 and a second film layer 2 stacked together; the second film layer 2 has an inner side and an outer side opposite to each other, wherein the inner side is the side close to the human eyeball when in use, and the first film layer 1 is located on the outer side of the second film layer 2. The second film layer 2 comprises a silicone hydrogel layer 3, and a plurality of oxygen permeable channels 4 are dispersed on the silicone hydrogel layer 3, for improving the oxygen permeability and oxygen solubility of the silicone hydrogel layer.

[0025] Specifically, the oxygen permeable channel 4 runs through the inner and outer sides of the silicone hydrogel layer 3 and is connected to the first membrane layer 1 .

[0026] In some embodiments, the first film layer 1 is used as a sealing film, sealing the outside of the silicone hydrogel layer 3. The first film layer may be a hydrophilic coating.

[0027] Further, the second film layer 2 is a lens layer. In some embodiments, the second film layer 2 may be provided with a corrective lens for myopia or hyperopia.

[0028] refer to Figure 2 In order to make the distribution of the oxygen permeable channel 4 on the silicone hydrogel layer 3 more consistent with the structure of the human eye, in one embodiment, the silicone hydrogel layer 3 is divided into a first area 5 and a second area 6 which are arranged radially from the inside to the outside. The first area corresponds to the area where the pupil of the human eye is located, and the first area is used to form an optical lens (for example, a concave lens or a convex lens), and the second area is located outside the first area, and the oxygen permeable channel is arranged in the second area.

[0029] In one embodiment, due to the requirement of comfort when wearing the contact lens, the edge of the contact lens gradually becomes thinner to fit the human eye and reduce the foreign body sensation when blinking. A third area 7 is formed on the periphery of the second area 6 (the sizes of the first area, the second area, and the third area can be adjusted according to actual conditions, that is, the sizes of the above areas are not fixed, such as Figure 2 As shown in the figure, the positions of the first area 5, the second area 6, and the third area 7 are indicated by dividing by dotted lines. The thickness of the silicone hydrogel layer gradually decreases from the second area to the third area, and the air permeability of the contact lens is negatively correlated with the thickness of the silicone hydrogel layer. Therefore, there is no oxygen permeable channel in the third area, thereby reducing the production cost.

[0030] Furthermore, in some embodiments, the diameter of the oxygen permeable channel 4 gradually decreases from the inside to the outside along the radial direction of the second region 6, thereby saving costs while keeping the air permeability substantially unchanged.

[0031] In one embodiment, for example Figure 2 As shown in FIG. 1 , the distribution of the oxygen permeable channels 4 in the second region 6 can be viewed as a number of lines extending from the center of the circle to the circumference.

[0032] The line can be a straight line or a spiral line, so that the oxygen permeable channels 4 are evenly distributed in the second area 6, so that the overall air permeability of the second area 6 can achieve a consistent effect.

[0033] In another embodiment, the oxygen permeable channels 4 may also be distributed in the second region 6 in the form of concentric circles, which can also achieve the effect of making the overall air permeability of the second region 6 consistent.

[0034] In some embodiments, the oxygen permeable channel 4 can be silicone hydrogel. The silicon monomer content in the silicone hydrogel is higher than the silicon monomer content in the silicone hydrogel layer. Compared with a single silicone hydrogel layer, it can effectively improve oxygen permeability and oxygen solubility, and delay the user's fatigue after wearing it for a long time.

[0035] Furthermore, the oxygen permeable channel 4 can be formed on the silicone hydrogel layer by silicone hydrogel transfer or direct injection molding, and the cross-section of the oxygen permeable channel 4 in the radial direction of the second membrane layer 6 is circular, and can swell or shrink after curing.

[0036] In one embodiment, the oxygen permeable channel may be formed by silicone hydrogel particles, which are embedded in the silicone hydrogel layer to form the oxygen permeable channel.

[0037] Among them, the silicone hydrogel particles can be in the shape of columns, spheres, etc.

[0038] Furthermore, in order to improve the wearing comfort of the present invention, the second film layer 6 also includes a hydrophilic layer, which is located on the inner side of the silicone hydrogel layer.

[0039] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0040] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A contact lens with a breathable structure, comprising a first film layer (1) and a second film layer (2) stacked together, wherein the second film layer (2) is a lens layer, characterized in that: The second film layer (2) has an inner side and an outer side opposite to each other, and the first film layer (1) is connected to the outer side of the second film layer (2); the second film layer (2) comprises a silicone hydrogel layer (3), and the silicone hydrogel layer (3) is provided with a plurality of oxygen permeable channels (4), and the oxygen permeable channels (4) are connected to the first film layer (1).

2. A contact lens with a breathable structure according to claim 1, characterized in that: The silicone hydrogel layer (3) is divided into a first region (5), a second region (6), and a third region (7) which are arranged in sequence from the inside to the outside along the radial direction, and the oxygen permeable channel (4) is located in the second region (6).

3. A contact lens with a breathable structure according to claim 2, characterized in that: The thickness of the silicone hydrogel layer (3) gradually decreases along the radial direction from the second region (6) to the third region (7).

4. A contact lens with a breathable structure according to claim 3, characterized in that: The diameters of the plurality of oxygen permeable channels (4) distributed in the second region (6) gradually decrease from the inside to the outside along the radial direction of the second region (6).

5. A contact lens with a breathable structure according to claim 2, characterized in that: The plurality of oxygen permeable channels (4) form a plurality of lines distributed in a scattered manner in the second area (6), with one end of the line close to the first area (5) and the other end close to the third area (7).

6. A contact lens with a breathable structure according to claim 2, characterized in that: The plurality of oxygen permeable channels (4) form a plurality of concentric circles in the second region (6).

7. A contact lens with a breathable structure according to claim 1, characterized in that: The oxygen permeable channel (4) is silicone hydrogel, and the silicon content in the silicone hydrogel is higher than the silicon content in the silicone hydrogel layer.

8. A contact lens with a breathable structure according to claim 7, characterized in that: The cross section of the oxygen permeable channel (4) in the radial direction of the second membrane layer (2) is circular.

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