Disposable shading medical corneal protection lens

Abstract

The utility model discloses a pair of disposable shading medical cornea protection glasses, which comprises four layers of structures, namely an anti-scratching layer, a moisturizing layer, a pigment layer and an attaching layer from outside to inside in sequence, the anti-scratching layer, the moisturizing layer and the attaching layer are sequentially attached and directly connected, and the peripheries of the anti-scratching layer, the moisturizing layer and the attaching layer are integrally fixed to form an arc-shaped lens body; the pigment layer is arranged between the moisturizing layer and the attaching layer and is a black semi-transparent or lightproof pigment coating, and the light transmittance is 0-50%. According to the disposable shading medical cornea protection lens, the light inlet amount of the cornea can be reduced, the cornea is prevented from being damaged by instruments and machines, and the disposable shading medical cornea protection lens has wide application prospects.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology and relates to a disposable light-shielding medical corneal protective lens. Background Technology

[0002] The cornea, the transparent outer layer of the eyeball, is about 1 mm thick and is the most important refractive component. It has highly sensitive nerve endings, making it extremely sensitive to foreign objects and damage. To maintain its transparency, the cornea lacks blood vessels and primarily obtains nutrients and oxygen through tears and aqueous humor. Therefore, constant blinking is necessary to maintain the tear film on the corneal surface when the eyes are open. In summary, the cornea is highly sensitive; even minor damage can cause discomfort, and recovery is relatively difficult. Therefore, injuries to the cornea often result in significant pain, photophobia, tearing, and blepharospasm.

[0003] However, during surgery, laser treatment, and minimally invasive procedures, direct exposure to various light sources such as operating lights and lasers not only causes significant discomfort to patients but also easily damages the eyes, potentially even causing changes in the fundus and affecting vision. Especially in laser treatments around the eyes, high-energy laser therapy can easily cause irreversible damage to the fundus.

[0004] Meanwhile, during surgeries or procedures on or around the eyes, it is necessary to fully expose the surgical field while simultaneously requiring the patient to keep their eyes open for extended periods. Prolonged exposure of the cornea can easily lead to corneal damage. This is especially true in cosmetic surgeries such as double eyelid surgery, medial canthoplasty, and blepharoplasty, where patients repeatedly open their eyes to observe changes in shape, greatly increasing discomfort and potentially causing retinal damage in severe cases. Furthermore, patients clearly see the surgeon's movements during the procedure, significantly increasing their anxiety. In addition, repeated periocular manipulation can easily scratch the cornea, causing discomfort in mild cases and corneal damage in severe cases. Therefore, there is an urgent need for a method that can effectively prevent strong light, protect the cornea, and not obstruct the surgical field of vision, while also facilitating adjustments to the eyeglasses.

[0005] Current techniques, such as instructing patients to close their eyes and use external light shields, not only affect the surgical field of vision but are also unreliable. Furthermore, many clinical procedures require patients to keep their eyes open, which greatly increases patient discomfort and, if prolonged, can negatively impact eye health and the final prognosis. While ophthalmic surgery also uses moist gauze for covering, this method has several drawbacks, including gauze displacement, obstruction of the surgical field of vision, and the gauze itself rubbing against the cornea. Some patents employ a sandwich-structure design for corneal protective lenses, typically using opaque materials like gauze, which has the advantage of absorbing surgical fluid. The main drawback of this structure is its complete opacity, while during ophthalmic surgery and laser treatment, patients often need to observe and evaluate the treatment effect through a mirror to adjust the treatment method as needed. In these situations, this completely light-blocking design cannot meet clinical requirements. Utility Model Content

[0006] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a disposable light-blocking medical corneal protection lens.

[0007] This invention provides a disposable, light-blocking medical corneal protective lens. The corneal protective lens comprises a four-layer structure, consisting of a scratch-resistant layer, a moisturizing layer, a pigment layer, and an adhesive layer from the outside in. In this invention, the "outer" refers to the side away from the cornea and in contact with the air, and the "inner" refers to the side in contact with the cornea.

[0008] The anti-scratch layer, moisturizing layer and bonding layer are sequentially bonded and directly connected, and fixed in an integral manner around the perimeter to form a whole, constituting an arc-shaped lens body. Between the moisturizing layer and the bonding layer is a pigment layer, which is a black semi-transparent or opaque pigment coating. Its light transmittance can be designed to be 0-50% according to clinical needs, preferably 20%.

[0009] The adhesive layer and moisturizing layer are made of contact lens material, possessing good breathability and moisturizing properties. They can be made of HEMA hydrogel, nonionic hydrogel (HEMA+NVP), or silicone hydrogel (HEMA+silicone), with silicone hydrogel being the preferred material. The inner concave surface of the adhesive layer is a smooth plane with a diameter slightly larger than the diameter of the human cornea, ranging from 13.80-14.50 mm, preferably 14.2 mm. The base curve is slightly larger than the anterior corneal surface, ranging from 8.0-8.9 mm, preferably 8.6 mm. The center thickness is 0.06-0.20 mm, preferably 0.10 mm.

[0010] The moisturizing layer covers the outside of the adhesive layer, has the same diameter as the adhesive layer, and its diameter ranges from 13.80 to 14.50 mm, preferably 14.2 mm. Its base curve is slightly larger than the anterior surface of the cornea, and its size is 8.0 to 8.9 mm, preferably 8.6 mm. Its center thickness is 0.06 to 0.20 mm, preferably 0.10 mm.

[0011] The scratch-resistant layer is made of thermoplastic polyurethane to improve the product's toughness and scratch resistance. It covers the outside of the moisturizing layer and has the same diameter as the moisturizing layer, ranging from 13.80 to 14.50 mm, preferably 14.2 mm. The base curve is slightly larger than the anterior surface of the cornea, ranging from 8.0 to 8.9 mm, preferably 8.6 mm, and the center thickness is 0.01 to 0.10 mm, preferably 0.05 mm.

[0012] The pigment layer is a black semi-transparent or opaque pigment coating. The light transmittance of the corneal protective lens is adjusted by the pigment distribution, with a transmittance of 0-50%, preferably 20%. The pigment layer is aligned with the center of the moisturizing layer and the adhesive layer, and its diameter is slightly larger than the pupil diameter but smaller than the corneal diameter, with a diameter of 8.5mm-13.0mm, preferably 9.0mm.

[0013] In one specific embodiment, the outer side of the scratch-resistant layer and / or the inner side of the bonding layer may also be provided with an antibacterial coating and / or a moisturizing coating, or other coatings with functions and effects.

[0014] The beneficial effects of this invention include: Based on decorative colored plano contact lenses, this invention designs a novel disposable medical corneal contact lens that provides light protection and corneal shielding. On one hand, this invention differs from existing corneal protective lenses by adding a scratch-resistant layer, enhancing its ability to protect the cornea and preventing corneal abrasions during surgery. On the other hand, this invention uses a pigment layer covering the pupil area as the structure for adjusting the light-shielding ability of the corneal protective lens, effectively reducing the overall thickness of the lens and increasing user comfort. Finally, the pigment layer structure used in this invention is more mature in terms of manufacturing process and product stability than existing corneal contact lens photochromic coating structures. Furthermore, it allows for more precise control of light intake by adjusting the pigment distribution within the pigment layer. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram showing the disassembled structure of the corneal protection lens of this utility model.

[0017] Figure 2 These are cross-sectional (left) and front (right) structural diagrams of the corneal protection lens of this utility model. Detailed Implementation

[0018] The utility model will be further described in detail below with reference to the specific embodiments and accompanying drawings. Except for the contents specifically mentioned below, the processes, conditions, and experimental methods for implementing this utility model are all common knowledge and general knowledge in the field, and this utility model has no particular limitations.

[0019] This invention provides a disposable, light-blocking medical corneal protective lens. The lens comprises four layers: a scratch-resistant layer, a moisturizing layer, a pigment layer, and an adhesive layer, arranged sequentially from the outside in. The scratch-resistant layer, moisturizing layer, and adhesive layer are sequentially bonded and directly connected, with the periphery integrally fixed to form an arc-shaped lens body. The pigment layer, a black, semi-transparent or opaque pigment coating with a light transmittance of 0-50%, is disposed between the moisturizing layer and the adhesive layer. This disposable, light-blocking medical corneal protective lens can reduce the amount of light entering the cornea and prevent mechanical damage to the cornea from instruments, and has broad application prospects.

[0020] like Figure 1 and Figure 2 As shown, this utility model provides a corneal protection lens, which includes a four-layer structure. Unless otherwise specified, the corneal side is the inner side and the side away from the cornea is the outer side. From the outside to the inside, the layers are a scratch-resistant layer 4, a moisturizing layer 3, a pigment layer 2, and an adhesive layer 1.

[0021] The corneal protective lens is designed for single use and is sterilized by moist heat steam, soaked in sterile saline, with the inner packaging sterilized by radiation and the outer packaging vacuum-sealed to ensure aseptic operation during the procedure.

[0022] The anti-scratch layer 4, moisturizing layer 3 and bonding layer 1 are bonded and directly connected, and the edges are fixed in one piece to form an arc-shaped lens body. Between the moisturizing layer 3 and the bonding layer 1 is a pigment layer 2, which is a black semi-transparent or opaque pigment coating. Its light transmittance can be designed to be 0-50% according to clinical needs, preferably 20%.

[0023] The adhesive layer 1 and moisturizing layer 3 are made of materials used in contact lenses, possessing excellent breathability and moisturizing properties. They can be made of hydrogel (HEMA), nonionic hydrogel (HEMA+NVP), or silicone hydrogel (HEMA+silicone), with silicone hydrogel being the preferred material. The inner concave surface of the adhesive layer 1 is a smooth plane with a diameter slightly larger than the diameter of the human cornea, ranging from 13.80 to 14.50 mm, preferably 14.2 mm. The base curve is slightly larger than the anterior surface of the cornea, ranging from 8.0 to 8.9 mm, preferably 8.6 mm. The center thickness is 0.06 to 0.20 mm, preferably 0.10 mm.

[0024] The moisturizing layer 3 covers the outside of the adhesive layer 1, and has the same diameter as the adhesive layer 1, with a diameter range of 13.80-14.50 mm, preferably 14.2 mm. The base curve is slightly larger than the anterior surface of the cornea, with a size of 8.0-8.9 mm, preferably 8.6 mm, and a center thickness of 0.06-0.20 mm, preferably 0.10 mm.

[0025] The scratch-resistant layer 4 is made of thermoplastic polyurethane to improve the product's toughness and scratch resistance. It covers the outside of the moisturizing layer 3 and has the same diameter as the moisturizing layer 3, ranging from 13.80 to 14.50 mm, preferably 14.2 mm. The base curve is slightly larger than the anterior surface of the cornea, ranging from 8.0 to 8.9 mm, preferably 8.6 mm, and the center thickness is 0.01 to 0.10 mm, preferably 0.05 mm.

[0026] The pigment layer 2 is a black semi-transparent or opaque pigment coating. The light transmittance of the corneal protective lens is adjusted by the pigment distribution. The light transmittance is 0-50%, preferably 20%. The pigment layer 2 is aligned with the center of the moisturizing layer 3 or the adhesive layer 1. Its diameter is slightly larger than the pupil diameter but smaller than the corneal diameter, with a diameter of 8.5mm-13.0mm, preferably 9.0mm.

[0027] In the specific implementation process, the inner side (i.e., concave surface) of the bonding layer 1 is a smooth plane, pre-coated with sodium hyaluronate, which can play a role in lubrication and moisturization; the pigment layer 2 is directly coated on the outer side (i.e., convex surface) of the bonding layer 1, slightly larger than the maximum diameter of the pupil, to ensure complete coverage of the pupil and to achieve the purpose of light blocking; the moisturizing layer 3 is directly covered on the outer side of the bonding layer 1, i.e., the outer side of the pigment layer 2, which serves to moisturize and protect the cornea on the one hand, and prevent the pigment layer 2 from falling off on the other hand; the scratch-resistant layer 4 is directly covered on the outer side of the moisturizing layer 3 to prevent instruments from scratching the cornea.

[0028] In one specific embodiment, an antibacterial coating and / or a moisturizing coating, or a coating with other functions and effects, may be added to the outside of the anti-scratch layer 4 and / or the inside of the adhesive layer 1.

[0029] Example 1

[0030] This embodiment provides a disposable light-blocking medical corneal protective lens. The corneal protective lens includes a lens body, which includes an outer scratch-resistant layer 4, a moisturizing layer 3, and an inner adhesive layer 1. A pigment layer 2 is disposed between the moisturizing layer 3 and the adhesive layer 1 of the lens body.

[0031] The inner surfaces of the anti-scratch layer 4 and the moisturizing layer 3, the pigment layer 2, and the outer surfaces of the adhesive layer 1 are tightly bonded together, and the periphery of the anti-scratch layer 4, the moisturizing layer 3, and the adhesive layer 1 are bonded and fixed together.

[0032] The anti-scratch layer 4 has a diameter of 14.2 mm, a base arc of 8.6 mm, and a center thickness of 0.05 mm.

[0033] The moisturizing layer 3 has a diameter of 14.2 mm, a base arc of 8.6 mm, and a center thickness of 0.10 mm.

[0034] The pigment layer 2 is a black semi-transparent pigment coating disposed between the moisturizing layer 3 and the bonding layer 1, with a light transmittance of 20%.

[0035] The center of the pigment layer 2 is aligned with the adhesive layer 1, and its diameter is 9.0 mm.

[0036] The bonding layer 1 has a diameter of 14.2 mm, a base arc of 8.6 mm, and a center thickness of 0.10 mm.

[0037] Example 2

[0038] This embodiment provides a disposable light-blocking medical corneal protective lens. The corneal protective lens includes a lens body, which includes an outer scratch-resistant layer 4, a moisturizing layer 3, and an inner adhesive layer 1. A pigment layer 2 is disposed between the moisturizing layer 3 and the adhesive layer 1 of the lens body.

[0039] The inner surfaces of the anti-scratch layer 4 and the moisturizing layer 3, the pigment layer 2, and the outer surfaces of the adhesive layer 1 are tightly bonded together, and the periphery of the anti-scratch layer 4, the moisturizing layer 3, and the adhesive layer 1 are bonded and fixed together.

[0040] The anti-scratch layer 4 has a diameter of 14.2 mm, a base arc of 8.6 mm, and a center thickness of 0.05 mm.

[0041] The moisturizing layer 3 has a diameter of 14.2 mm, a base arc of 8.6 mm, and a center thickness of 0.10 mm.

[0042] The pigment layer 2 is a black semi-transparent pigment coating disposed between the moisturizing layer 3 and the bonding layer 1, with a light transmittance of 20%.

[0043] The center of the pigment layer 2 is aligned with the adhesive layer 1, and its diameter is 9.0 mm.

[0044] The bonding layer 1 has a diameter of 14.2 mm, a base arc of 8.6 mm, and a center thickness of 0.10 mm.

[0045] An antibacterial coating is also added to the outside of the anti-scratch layer 4 to prevent the corneal protective lens from becoming infected during use.

[0046] Example 3

[0047] This embodiment provides a disposable light-blocking medical corneal protective lens. The corneal protective lens includes a lens body, which includes an outer scratch-resistant layer 4, a moisturizing layer 3, and an inner adhesive layer 1. A pigment layer 2 is disposed between the moisturizing layer 3 and the adhesive layer 1 of the lens body.

[0048] The inner surfaces of the anti-scratch layer 4 and the moisturizing layer 3, the pigment layer 2, and the outer surfaces of the adhesive layer 1 are tightly bonded together, and the periphery of the anti-scratch layer 4, the moisturizing layer 3, and the adhesive layer 1 are bonded and fixed together.

[0049] The anti-scratch layer 4 has a diameter of 14.2 mm, a base arc of 8.6 mm, and a center thickness of 0.05 mm.

[0050] The moisturizing layer 3 has a diameter of 14.2 mm, a base arc of 8.6 mm, and a center thickness of 0.10 mm.

[0051] The pigment layer 2 is a black semi-transparent pigment coating disposed between the moisturizing layer 3 and the bonding layer 1, with a light transmittance of 20%.

[0052] The center of the pigment layer 2 is aligned with the adhesive layer 1, and its diameter is 9.0 mm.

[0053] The bonding layer 1 has a diameter of 14.2 mm, a base arc of 8.6 mm, and a center thickness of 0.10 mm.

[0054] A moisturizing coating is also added to the inner side of the bonding layer 1 to keep the corneal protective lens moist during use and increase the comfort of use.

[0055] Example 4

[0056] This embodiment provides a disposable light-blocking medical corneal protective lens. The corneal protective lens includes a lens body, which includes an outer scratch-resistant layer 4, a moisturizing layer 3, and an inner adhesive layer 1. A pigment layer 2 is disposed between the moisturizing layer 3 and the adhesive layer 1 of the lens body.

[0057] The inner surfaces of the anti-scratch layer 4 and the moisturizing layer 3, the pigment layer 2, and the outer surfaces of the adhesive layer 1 are tightly bonded together, and the periphery of the anti-scratch layer 4, the moisturizing layer 3, and the adhesive layer 1 are bonded and fixed together.

[0058] The anti-scratch layer 4 has a diameter of 14.2 mm, a base arc of 8.6 mm, and a center thickness of 0.05 mm.

[0059] The moisturizing layer 3 has a diameter of 14.2 mm, a base arc of 8.6 mm, and a center thickness of 0.10 mm.

[0060] The pigment layer 2 is a black semi-transparent pigment coating disposed between the moisturizing layer 3 and the bonding layer 1, with a light transmittance of 20%.

[0061] The center of the pigment layer 2 is aligned with the adhesive layer 1, and its diameter is 9.0 mm.

[0062] The bonding layer 1 has a diameter of 14.2 mm, a base arc of 8.6 mm, and a center thickness of 0.10 mm.

[0063] In this embodiment, an antibacterial coating is added to the outer side of the anti-scratch layer 4 to prevent the corneal protective lens from becoming antibacterial during use and to prevent possible infection; a moisturizing coating is added to the inner side of the bonding layer 1 to moisturize the corneal protective lens during use and to increase the comfort of use.

[0064] In the description of this application, it should be understood that the orientation or positional relationship indicated in this application is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0065] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connected" should be interpreted broadly, referring to direct connection or indirect connection through an intermediate medium, and can refer to the internal connection of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above term in this application according to the specific circumstances.

[0066] This application discloses numerous different implementations or examples for achieving various structures. To simplify the disclosure, specific examples of components and arrangements are described in the embodiments. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed. Additionally, this application provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0067] The scope of protection of this utility model is not limited to the above embodiments. Any variations and advantages that can be conceived by those skilled in the art without departing from the spirit and scope of the utility model are included in this utility model and are protected by the appended claims.

Claims

1. A disposable, light-blocking medical corneal protective lens, characterized in that, The corneal protective lens comprises a four-layer structure, consisting of a scratch-resistant layer (4), a moisturizing layer (3), a pigment layer (2), and an adhesive layer (1) from the outside in. The anti-scratch layer (4), the moisturizing layer (3), and the bonding layer (1) are sequentially bonded and directly connected, and fixed in one piece around the perimeter to form an arc-shaped lens body; the pigment layer (2) is disposed between the moisturizing layer (3) and the bonding layer (1), and is a black semi-transparent or opaque pigment coating with a light transmittance of 0-50%.

2. The corneal protection lens as described in claim 1, characterized in that, The adhesive layer (1) is used to directly contact the human cornea, with a diameter of 13.80-14.50 mm, a base arc of 8.0-8.9 mm, and a center thickness of 0.06-0.20 mm.

3. The corneal protection lens as described in claim 1, characterized in that, The moisturizing layer (3) covers the outside of the bonding layer (1). The diameter of the moisturizing layer (3) is 13.80-14.50 mm, the base arc is 8.0-8.9 mm, and the center thickness is 0.06-0.20 mm.

4. The corneal protection lens as described in claim 1, characterized in that, The pigment layer (2) is aligned with the center of the moisturizing layer (3) and the adhesive layer (1), and has a diameter of 8.5 mm to 13.0 mm.

5. The corneal protection lens as described in claim 1, characterized in that, The anti-scratch layer (4) covers the outside of the moisturizing layer (3), with a diameter of 13.80-14.50 mm, a base arc of 8.0-8.9 mm, and a center thickness of 0.01-0.10 mm.

6. The corneal protection lens as described in claim 1, characterized in that, An antibacterial coating and / or a moisturizing coating are provided on the outer side of the anti-scratch layer (4) and / or the inner side of the bonding layer (1).

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