Contact lens structure for improving tear film stability

Abstract

The utility model relates to the field of contact lenses, and discloses a contact lens structure capable of improving tear film stability, which comprises a first coating film and a second coating film with nanoscale thickness, the second coating film is wrapped on the first coating film, the first coating film is attached to a contact lens main body, the first coating film is an inner hydrophobic layer, and the second coating film is an outer hydrophobic layer. The second coating film is an external hydrophilic layer; the edge of the first coating film is provided with a continuous bulge, the edge of the second coating film is provided with a double-arch structure which is matched with the continuous bulge in shape, a gap capable of containing tears is formed in the center of the double-arch structure, and the tears in the gap flow out when the first coating film is in a pressed state. According to the utility model, the rapid circulation of tears is realized, the protein deposition condition is reduced, the evaporation condition of moisture in the tears can be reduced, the osmotic pressure of a tear film is ensured, and the stability of the tear film is maintained.

Description

TECHNICAL FIELD

[0001] The utility model relates to contact lens field, concretely relates to a contact lens structure of improving tear film stability. BACKGROUND

[0002] In order to be able to improve the comfort of lens, the corner of contact lens is generally attached to the surface of the eyeball of the wearer, directly attached to the surface of the eyeball, resulting in the influence of tear circulation, the circulation rate drops, tear film cannot be updated in time, the deposition of protein in tear on contact lens, resulting in the lens is easy to blur.

[0003] At the same time, the common daily disposable contact lens on the market itself will continuously lose moisture with the increase of wearing time, and in this process, the osmotic pressure of tear will continuously rise, and tear is also difficult to flow, which will also affect the stability of tear film, and finally will lead to wearing discomfort and even dry eye clinical manifestations. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a contact lens structure of improving tear film stability to solve the technical problem that the lens in the prior art affects the circulation of tear on the eyeball of the wearer, leading to the difficulty of tear film in updating in time.

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] The utility model provides a contact lens structure of improving tear film stability, including the first coating and second coating with nanometer thickness, the second coating is wrapped and set on the first coating, the first coating is attached and set on the contact lens main body, the first coating is inner layer hydrophobic layer, and the second coating is external hydrophilic layer.

[0007] The edge of the first coating is provided with continuous convex, the edge of the second coating is provided with double-arch structure that is shaped with the continuous convex, the center of the double-arch structure forms a gap capable of containing tear, and the tear in the gap flows out under the pressure state of the first coating.

[0008] As a preferred scheme of the utility model, the double-arch structure includes first arch and second arch, the gap is arranged in the second arch, and the end of the first arch and the second arch is arc-shaped.

[0009] As a preferred scheme of the utility model, the periphery of the second coating is provided with a plurality of embedded grooves, the bottom of the embedded groove extends to the first coating, one end of the embedded groove is communicated with the gap, the other end of the embedded groove extends to the edge of the first coating, and the embedded groove is used for guiding the tear flowing out of the gap out of the second coating.

[0010] As a preferred scheme of the utility model, the embedded groove is curved as an arc shape.

[0011] As a preferred scheme of the utility model, the embedded groove is curved as an arc shape.

[0012] The utility model has the following beneficial effects compared with the prior art:

[0013] The utility model discloses a double coating structure prepared based on the injection and phase separation of the regulated charged liquid is arranged on the spectacle lens, the external hydrophilic layer can better fuse with the tear film, reduces the foreign body sensation generated by the wearing of the contact lens, the inner hydrophobic layer can effectively prevent the moisture loss of the lens, makes the lens more stable in the use process, reduces the evaporation condition of the moisture in the tear, guarantees the osmotic pressure of the tear film, maintains the stability of the tear film.

[0014] The utility model discloses a double arch structure is arranged on the edge of the double coating structure, and the double arch structure is stable, can absorb and release the tear before and after being pressed, and the wearer can control the lens to discharge the tear quickly through blinking, and then absorbs the new tear to keep the eyeball position moisturized, completes the circulation replacement of the tear, and reduces the protein deposition of the lens. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other implementation drawings can be obtained according to the provided drawings without creating labor.

[0016] Figure 1 The utility model provides the structure schematic diagram of the contact lens structure of improving the stability of tear film;

[0017] Figure 2 The utility model provides Figure 1 The structure amplification schematic diagram of the double arch structure in the embodiment shown in the figure;

[0018] Figure 3 The utility model provides Figure 1 The structure schematic diagram of the embedded groove in the embodiment shown in the figure.

[0019] The numbers in the figure respectively represent as follows:

[0020] 1-first coating;2-second coating;3-double arch structure;4-gap;5-embedded groove;6-eyeball;

[0021] 301 - First arch; 302 - Second arch. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 3 As shown, this utility model provides a contact lens structure that improves tear film stability, including a double-layer coating structure disposed on the outer layer of the lens. The double-layer coating structure includes a first coating 1 and a second coating 2. The first coating 1 is an inner hydrophobic layer, and the second coating 2 is an outer hydrophilic layer. The second coating 2 is disposed on the outer layer and directly adheres to the user's eyeball during use. The outer hydrophilic layer can better integrate with the tear film, reducing the foreign body sensation caused by wearing contact lenses. The second coating 2 is wrapped around the first coating 1, which is used to wrap and adhere to the contact lens body. This contact lens body can be selected from existing contact lenses. The inner hydrophobic layer can effectively prevent moisture loss from the lens, making the lens more stable during use.

[0024] Both the hydrophobic and hydrophilic layers possess excellent air permeability. The hydrophilic layer, loaded with oxygen contained in the water, enables oxygen permeability. The hydrophobic material typically has a microporous structure, allowing oxygen molecules to pass through, thus achieving oxygen permeability. The thicknesses of the first coating 1 and the second coating 2 are in the nanometer range.

[0025] The first coating 1 and the second coating 2 are a hydrophobic nanofiber membrane and a hydrophilic nanofiber membrane, respectively. The nanomaterial composed of this hydrophobic nanofiber membrane and the hydrophilic nanofiber membrane can be obtained by controlling the jetting and phase separation of charged liquid. This material adopts a hydrophobic and hydrophilic bilayer structure design similar to lotus leaves and is composed of fibers with a diameter of about 20 nanometers. Compared with the pore size of ordinary electrospun nanofiber membranes (>1.5 micrometers), the pore size of this material is very small, only 0.62 micrometers, and the porosity is as high as 78%.

[0026] In particular, in order to facilitate the flow of tears, the edge of the first coating 1 is provided with a continuous protrusion, the edge of the second coating 2 is provided with a double-arch structure 3 which is shaped according to the continuous protrusion, the periphery of the second coating 2 is attached to the eyeball 6, and the center of the double-arch structure 3 is formed with a gap 4 which can hold tears. The gap 4 is attached to the surface of the wearer's eyeball and has a capillary effect, which can absorb the liquid above the eyeball. The core of the capillary absorption of liquid is the capillary phenomenon, that is, the surface tension between the liquid and the inner wall of the capillary under natural conditions. When the diameter of the capillary is small enough, the tension difference between the inner and outer walls will cause the liquid to be sucked into the tube, as if it is attracted by "vacuum". When the capillary is pressed, the liquid inside flows out.

[0027] Specifically, after the user wears the lens, as the user blinks, the second coating 2 is a hydrophilic film, the gap 4 has a capillary function of absorbing water under pressure, and the tears flowing out from the upper eyelid of the user are sucked into the gap 4 and between the second coating 2 and the eyeball, thereby wetting the user's eyeball. Since the first coating 1 is a hydrophobic film, the moisture in the gap 4 and the center of the eyeball is not easy to flow, thereby maintaining the osmotic pressure of the tears and preventing the wearer's eyeball from drying.

[0028] The long-term accumulation of tears can cause protein deposition. Further, as the user blinks again, the double-arch structure 3 is again subjected to pressure, the gap 4 opens and releases the original tears, the tears flow to the lower part of the eyeball for recycling, and the tears above enter the gap 4 and the surface of the eyeball again, realizing the rapid replacement of tears. The speed of tear exchange not only reduces the deposition of proteins in the lens, but also ensures the water retention of the lens and maintains the stability of the tear film when the tears flow in the gap 4 each time.

[0029] In order to reduce the foreign body sensation, the double-arch structure 3 includes a first arch 301 and a second arch 302, the gap 4 is arranged in the second arch 302, and the ends of the first arch 301 and the second arch 302 are arc-shaped. The curvature of the arc-shaped first arch 301 and the second arch 302 can be arbitrarily selected, and the shape is supported by the first coating 1, and the arc ends are designed to improve the comfort of the wearer. Since the outer layer of the first arch 301 and the second arch 302 is a hydrophilic film in the present application, the hydrophilic film is generally a soft structure, and the soft first arch 301 and the second arch 302 will not have a great impact on the comfort of the wearer. In fact, since the thickness of the film body is nanoscale, the height of the arch is only slightly larger than the thickness of the film body, and the impact is negligible.

[0030] The double-arch structure 3 has good supporting performance.

[0031] Further, in order to enable the tear liquid to pass through the edge of the second coating film 2, to achieve rapid exchange of the tear liquid, the periphery of the second coating film 2 is provided with a plurality of fitting grooves 5, the bottom of the fitting groove 5 extends to the first coating film 1, one end of the fitting groove 5 communicates with the gap 4, and the other end of the fitting groove 5 extends to the edge of the first coating film 1. The fitting groove 5 is used for the transport of tear liquid, the fitting groove 5 at the upper end can guide the new tear liquid into the gap 4, and the fitting groove 5 at the lower end can quickly discharge the tear liquid in the gap 4, and guide the tear liquid flowing out of the gap 4 out of the second coating film 2.

[0032] The fitting groove 5 can further improve the degree of air permeability.

[0033] The fitting groove 5 is curved in an arc shape, and when the user blinks, the fitting groove 5 can rotate, thereby achieving rapid discharge of the tear liquid. The width of the end of the fitting groove 5 close to the gap 4 is less than the width of the end of the fitting groove 5 away from the gap 4.

[0034] Through the contact lens lens structure for improving the stability of the tear film in the embodiment, the tear liquid can be quickly discharged during the wearing of the contact lens, and after the discharge, the new tear liquid is absorbed to keep the position of the eyeball moist, complete the circulation and replacement of the tear liquid, reduce the protein deposition, and at the same time, the evaporation of water in the tear liquid can be reduced, the osmotic pressure of the tear film is guaranteed, and the stability of the tear film is maintained.

[0035] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application, the protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements are also regarded as falling within the protection scope of the present application.

Claims

1. A contact lens structure for increasing tear film stability, characterized by, The first coating (1) and the second coating (2) are nanometer-thick, the second coating (2) is arranged on the first coating (1), the first coating (1) is arranged on the main body of the contact lens, the first coating (1) is an inner hydrophobic layer, and the second coating (2) is an outer hydrophilic layer. The edge of the first coating (1) is provided with a continuous protrusion, the edge of the second coating (2) is provided with a double-arch structure (3) which is shaped according to the continuous protrusion, the center of the double-arch structure (3) is formed with a gap (4) capable of containing tears, and the tears in the gap (4) flow out when the first coating (1) is pressed.

2. The contact lens structure for increasing tear film stability according to claim 1, wherein The double-arch structure (3) comprises a first arch (301) and a second arch (302), the gap (4) is arranged in the second arch (302), and the ends of the first arch (301) and the second arch (302) are arc-shaped.

3. The contact lens structure for increasing tear film stability of claim 1, wherein, The periphery of the second coating (2) is provided with a plurality of embedded grooves (5), the bottom of the embedded groove (5) extends to the first coating (1), one end of the embedded groove (5) communicates with the gap (4), the other end of the embedded groove (5) extends to the edge of the first coating (1), and the embedded groove (5) is used for guiding the tears flowing out of the gap (4) out of the second coating (2).

4. The contact lens structure for increasing tear film stability of claim 3, wherein, The embedded groove (5) is curved in an arc shape.

5. The contact lens structure for increasing tear film stability of claim 4, wherein, The width of the end of the embedded groove (5) close to the gap (4) is smaller than the width of the end of the embedded groove (5) away from the gap (4).

Images