Corneal contact lens with defocused peripheries of concentric circles

Abstract

The corneal contact lens comprises a central optical area and a concentric circle peripheral defocusing area integrally formed on the bottom edge of the central optical area, and the concentric circle peripheral defocusing area is sequentially provided with a positioning area and an edge fuzzy arc area from the center to the edge of the central optical area. And a cutting lifting part which bends and extends towards the direction of the positioning area is arranged at the outer edge of the bottom edge of the edge fuzzy arc area. The edge fuzzy arc area is further thinned and softened by utilizing the cutting lifting part, the contact area between the edge fuzzy arc area and the cornea is increased, and the movement and rotation of the lens on the eyeball can be reduced by increasing the contact area, so that the stability of the lens is improved; due to the structural design of the cutting lifting part, the local pressure or friction of the bottom edge of the lens on the cornea can be effectively reduced, and the possibility that a patient generates foreign body sensation and discomfort is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of corneal contact lenses, in particular to a corneal contact lens with concentric circle peripheral defocusing. Background Art

[0002] Corneal contact lenses, also known as contact lenses, are lenses worn on the cornea of ​​the eye, mainly used to correct vision. When there are visual defects in the eye (such as myopia, hyperopia, astigmatism, etc.), the light will focus on the incorrect position on the retina after entering the eye, resulting in blurred or distorted vision. The central optical zone of the corneal contact lens has a specific optical degree and curvature, which can correct the refraction problem of the eyeball, so that the light inside the eyeball is correctly focused on the retina, thereby producing clear vision;

[0003] For example, a concentric circle defocus contact lens disclosed in the authorization announcement number CN206906716U adopts a quasi-U-shaped structure, including a central optical zone, a defocus zone, a positioning zone and an edge arc zone, wherein the central optical zone, the defocus zone, the positioning zone and the edge arc zone are arranged in sequence from the center to the edge of the contact lens, and the central optical zone, the defocus zone, the positioning zone and the edge arc zone are all arranged in concentric circles; the central optical zone is used to focus the transmitted light on the retina, and the concentric circle defocus contact lens is easy for the wearer to use, can induce peripheral retinal defocus, and slow down the wearer's myopia development rate, but the contact area between the edge arc zone and the cornea in this technical solution is low, and the lens may move or rotate slightly during exercise, blinking or other facial expression changes, and due to the low contact area between the two, this will cause local pressure or friction between the lens and the eyeball, thereby causing a foreign body sensation and discomfort, reducing the patient's wearing experience. Utility Model Content

[0004] The utility model aims to provide a concentric peripheral defocused corneal contact lens, in which a cutting lifting portion is arranged in the edge blurred arc area, and the edge blurred arc area is thinned by the cutting lifting portion, thereby increasing the contact area between the corneal contact lens and the cornea, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a concentric peripheral defocus corneal contact lens, comprising a central optical zone and a concentric peripheral defocus zone integrally formed at the bottom edge of the central optical zone, wherein the concentric peripheral defocus zone is provided with a positioning zone and an edge blur arc zone in sequence from the center to the edge of the central optical zone, and a cutting lifting portion extending in a curved direction toward the positioning zone is provided at the outer edge of the bottom edge of the edge blur arc zone.

[0006] Preferably, the central optical zone is configured as a concave lens, the diopter of which is configured to be -12.00DS to -0.00DS, and the thickness of the central optical zone is configured to be 0.02MM to 0.2MM.

[0007] Preferably, the diameter of the concave lens sheet is 0.25 mm-1.50 mm.

[0008] Preferably, the outer wall arc diameter of the positioning zone is less than or equal to the outer wall arc diameter of the edge fuzzy arc zone, and the inner wall arc diameter of the positioning zone is greater than the inner wall arc diameter of the edge fuzzy arc zone.

[0009] Preferably, the corneal contact lens is made of silicone hydrogel or hydrogel material.

[0010] Compared with the prior art, the beneficial effect of the utility model is that the concentric peripheral defocused corneal contact lens is provided with structures such as an edge blurring arc zone and a cutting lifting portion that cooperate with each other. The cutting lifting portion thins the bottom edge of the edge blurring arc zone, making the edge blurring arc zone easier to deform and fit, thereby increasing the contact area between the edge blurring arc zone and the cornea. By increasing the contact area, the movement and rotation of the lens on the eyeball can be reduced, thereby improving the stability of the lens. In addition, due to the structural design of the cutting lifting portion, the local pressure or friction of the bottom edge of the lens on the cornea can be effectively reduced, thereby reducing the possibility of foreign body sensation and discomfort in patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0012] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0013] Figure 3 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0014] Figure 4 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0015] Figure 5 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0016] In the figure: 1. Central optical area; 2. Concentric peripheral defocus area; 3. Positioning area; 4. Edge blurred arc area; 5. Cutting lifting part. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-5 The utility model provides an embodiment: a concentric peripheral defocused corneal contact lens, comprising a central optical zone 1 and a concentric peripheral defocused zone 2 integrally formed at the bottom edge of the central optical zone 1, wherein the concentric peripheral defocused zone 2 is provided with a positioning zone 3 and an edge blurring arc zone 4 in sequence from the center to the edge of the central optical zone 1, and a cutting lifting portion 5 extending along a curved edge toward the positioning zone 3 is provided at the outer edge of the bottom edge of the edge blurring arc zone 4, and the cutting lifting portion 5 is used to thin the edge blurring arc zone 4, and when the corneal contact lens contacts the cornea, the cutting lifting portion 5 increases the contact area between the edge blurring arc zone 4 and the cornea;

[0019] The central optical zone 1 is set as a concave lens, the degree of which is set to -12.00DS to -0.00DS, the thickness of the central optical zone 1 is set to 0.02MM to 0.2MM, and the diameter of the concave lens is 0.25mm to 1.50mm;

[0020] The diameter of the outer wall arc surface of the positioning area 3 is less than or equal to the diameter of the outer wall arc surface of the edge fuzzy arc area 4, and the diameter of the inner wall arc surface of the positioning area 3 is greater than the diameter of the inner wall arc surface of the edge fuzzy arc area 4;

[0021] A progressive zone is also provided between the central optical zone 1 and the concentric peripheral defocus zone 2, with a radius range of 1.50 to 2.0 mm, a radius range of the concentric peripheral defocus zone 2 is 2.0 to 4.0 mm, and outside the radius range of 4.0 mm are the positioning zone 3 and the edge blur arc zone 4 in sequence;

[0022] Corneal contact lenses are made of silicone hydrogel or hydrogel materials. Both silicone hydrogel and hydrogel materials have good hydration properties and can absorb and retain a large amount of water to form a lubricating layer similar to tears.

[0023] When the embodiment of the present application is used, first, the contact lens is provided with a central optical zone 1, a concentric peripheral defocus zone 2, a positioning zone 3 and an edge blur arc zone 4 in sequence from the center to the edge. The central optical zone 1 is the most critical part of the corneal contact lens, which is directly placed on the cornea for correcting vision. The curvature and degree of this zone are determined according to the patient's vision, and can change the refraction path of light so that it can be correctly focused on the retina inside the eyeball, thereby producing clear vision. The concentric peripheral defocus zone 2 is located around the central optical zone 1, and its curvature gradually slows down. It can no longer provide accurate optical correction, but allows the light to gradually leave the focus, avoiding discomfort in the transition zone and making the contact lens more comfortable to wear. The positioning zone 3 is located on the inner side of the edge blur arc zone 4, so that the contact lens can be worn more comfortably. When worn, it can be accurately positioned to maintain the correct direction and position, reducing the possibility of lens displacement or rotation. The edge blur arc area 4 is located at the edge of the lens, directly in contact with the cornea, and makes the transition between the contact lens and the eyeball softer, reducing the discomfort caused by the edge. When the corneal contact lens contacts the cornea, the cutting lifting part 5 makes the bottom edge of the edge blur arc area 4 thinner, making the edge blur arc area 4 easier to deform and fit, thereby increasing the contact area between the edge blur arc area 4 and the cornea. By increasing the contact area, the movement and rotation of the lens on the eyeball can be reduced, thereby improving the stability of the lens. In addition, the structural design of the cutting lifting part 5 can effectively reduce the local pressure or friction of the lens edge on the cornea, reducing the possibility of foreign body sensation and discomfort in patients, thereby improving wearing comfort.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A concentric peripheral defocused corneal contact lens, characterized in that: The invention comprises a central optical zone (1) and a concentric peripheral defocusing zone (2) integrally formed at the bottom edge of the central optical zone (1); the concentric peripheral defocusing zone (2) is provided with a positioning zone (3) and an edge blurring arc zone (4) in sequence from the center to the edge of the central optical zone (1); and a cutting lifting portion (5) is provided at the outer edge of the bottom edge of the edge blurring arc zone (4) and extends in a curved direction toward the positioning zone (3).

2. A concentric circle peripheral defocused corneal contact lens according to claim 1, characterized in that: The central optical zone (1) is configured as a concave lens sheet, the diopter of which is configured to be -12.00DS to -0.00DS, and the thickness of the central optical zone (1) is configured to be 0.02MM to 0.2MM.

3. A concentric circle peripheral defocused corneal contact lens according to claim 2, characterized in that: The diameter of the concave lens sheet is 0.25mm-1.50mm.

4. The concentric circle peripheral defocused corneal contact lens according to claim 1, characterized in that: The diameter of the outer wall arc surface of the positioning area (3) is less than or equal to the diameter of the outer wall arc surface of the edge blurred arc area (4), and the diameter of the inner wall arc surface of the positioning area (3) is greater than the diameter of the inner wall arc surface of the edge blurred arc area (4).

5. The concentric circle peripheral defocused corneal contact lens according to claim 1, characterized in that: The corneal contact lens is made of silicone hydrogel or hydrogel material.

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