Sclera lens comfortable to wear

Abstract

The utility model discloses a comfortable wearing type sclera lens, which comprises an optical area which is positioned in the center of the sclera lens and is used for correcting vision, a transition area which surrounds the periphery of the optical area and a landing area which surrounds the periphery of the transition area, the optical area and the transition area are of an integrally formed structure, and the transition area and the landing area are of a split type structure. The optical area and the transition area are hard areas, the landing area is a soft area, at least three clamping holes are evenly distributed in the transition area in the circumferential direction of the transition area, the landing area is correspondingly provided with connecting protrusions matched with the clamping holes in shape, the transition area and the landing area are connected in a clamped mode through the clamping holes and the connecting protrusions, and the landing area is further provided with a plurality of cone-like micro holes with the hole diameters large inside and small outside. The landing area is well matched with the sclera and softly lands on the sclera, the pressure borne by the sclera can be reduced, the micropore design of the landing area can not only promote circulation of internal and external aqueous humor of the sclera lens and provide enough oxygen for the cornea, but also promote discharge of bubbles and metabolites below the lens, and the wearing comfort of the eyes of a patient is improved.

Description

Technical Field

[0001] This utility model relates to the field of scleral lens technology, and in particular to a comfortable scleral lens. Background Technology

[0002] Scleral lenses, also known as rigid gas-permeable scleral contact lenses, are typically made of highly oxygen-permeable rigid polymer materials, such as fluorosiloxane acrylates. Unlike traditional corneal contact lenses, scleral lenses are large-diameter lenses that come into contact with the sclera when worn. Scleral lenses do not contact the cornea; there is a space between the cornea and the lens, which needs to be filled with sterile isotonic fluid before wearing.

[0003] Currently, scleral lenses are all molded in one piece. Because scleral lenses are used for highly irregular astigmatism, such as various corneal ectasias (e.g., keratoconus) and limbal degeneration, a rigid material that is not easily deformed must be used at the corneal site. Therefore, scleral lenses are usually made from a single rigid material. While scleral lenses have advantages that traditional contact lenses cannot match, they also share the common problems of rigid contact lenses. Due to their deep sag and large diameter, scleral lenses cause a significant foreign body sensation when worn. Furthermore, the rigidity of the material means that the landing zone, made of rigid material, adheres tightly to the sclera, compressing the capillaries and causing retinal congestion, and even complications such as conjunctival staining. Soft materials, on the other hand, generally suffer from oxygen deficiency. Due to their poor oxygen permeability, long-term wear can lead to corneal hypoxia, potentially causing corneal edema, neovascularization, and endothelial cell reduction. Therefore, there is an urgent need to develop a comfortable scleral lens to solve these technical problems.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] The purpose of this invention is to provide a comfortable scleral lens with a simple structure and ingenious design. The landing area matches the sclera well and lands softly on the sclera, reducing the pressure on the sclera. The microporous design of the landing area not only promotes the flow of aqueous humor between the inside and outside of the sclera and provides sufficient oxygen to the cornea, but also promotes the discharge of air bubbles and metabolites under the lens, greatly improving the wearing comfort of the patient's eyes. It has broad application prospects and is conducive to its widespread application.

[0006] To achieve the above objectives, this utility model provides a comfortable scleral lens, comprising an optical zone located at the center of the scleral lens for vision correction, a transition zone surrounding the outer periphery of the optical zone, and a landing zone surrounding the outer periphery of the transition zone. The optical zone and the transition zone are integrally formed, while the transition zone and the landing zone are separate structures. The optical zone and the transition zone are rigid areas, while the landing zone is a soft area. The transition zone has at least three locking holes evenly distributed along its circumference. The landing zone has corresponding connecting protrusions that match the shape of the locking holes. The transition zone and the landing zone are connected by locking holes and connecting protrusions. The landing zone also has several cone-shaped micropores with larger inner diameters and smaller outer diameters.

[0007] Preferably, the landing area is an asymmetric aspherical surface, and its radius of curvature is consistent with the radius of curvature of the wearer's sclera.

[0008] Preferably, the card hole is a through hole, a blind hole, or a countersunk hole.

[0009] Preferably, the connecting protrusion is a cone, cuboid, cylinder, trapezoid, or stepped structure.

[0010] Preferably, the diameter of the optical zone is 5.0-11.0 mm, the diameter of the transition zone is 8.0-18.0 mm, and the diameter of the landing zone is 10.0-24.0 mm.

[0011] Preferably, the landing area is a hydrogel landing area, a silicone hydrogel landing area, or a non-HEMA material landing area.

[0012] The present invention provides a comfortable scleral lens with the following beneficial effects.

[0013] 1. The landing area of ​​this invention matches well with the sclera and lands softly on the sclera. The optical area and transition area are made of rigid materials, which ensures the improvement of vision for patients with high or irregular astigmatism. The landing area is made of soft material, which lands softly on the sclera and fits the sclera better, which can reduce scleral pressure, reduce the occurrence of complications, and increase scleral comfort.

[0014] 2. This invention features permeable micropores in the landing zone, especially at the connection between the transition zone and the landing zone. This not only promotes the flow of aqueous humor between the inner and outer surfaces of the scleral lens, providing sufficient oxygen to the cornea, but also facilitates the removal of air bubbles and metabolites under the lens. At the same time, the cone-shaped micropores, which are larger on the inside and smaller on the outside, effectively prevent the backflow of metabolites or impurities from the outside of the lens, ensuring that the tear film under the lens is clear and clean, and greatly improving the wearing comfort of the patient's eyes. Attached Figure Description

[0015] Figure 1This utility model provides a structural schematic diagram of a comfortable scleral lens.

[0016] Figure 2 This is a schematic diagram of the landing zone structure of a comfortable scleral lens provided by this utility model.

[0017] In the picture:

[0018] 1. Optical area 2. Transition area 3. Card slot 4. Landing area 5. Connecting protrusion 6. Micro-hole Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments and accompanying drawings to help understand the content of the present invention.

[0020] like Figures 1-2 The figures shown are schematic diagrams of the structure and landing area of ​​a comfortable scleral lens provided by this utility model. The comfortable scleral lens includes an optical zone 1 located at the center of the lens for vision correction, a transition zone 2 surrounding the optical zone 1, and a landing area 4 surrounding the transition zone 2. The optical zone 1 and transition zone 2 are integrally formed, while the transition zone 2 and landing area 4 are separate structures. The optical zone 1 and transition zone 2 are rigid areas, and the landing area 4 is a soft area. The transition zone 2 has at least three locking holes 3 evenly distributed along its circumference. The landing area 4 has corresponding connecting protrusions matching the shape of the locking holes 3. The transition zone 2 and landing area 4 are connected by the locking holes 3 and the connecting protrusions. The landing area 4 also has several cone-shaped micropores 6 with larger inner diameters and smaller outer diameters. The landing area 4 is an asymmetric aspherical surface, and its radius of curvature is consistent with the corresponding radius of curvature of the wearer's sclera. The optical zone 1 has a diameter of 5.0-11.0 mm, the transition zone 2 has a diameter of 8.0-18.0 mm, and the landing zone 4 has a diameter of 10.0-24.0 mm. The locating hole 3 is a through hole, blind hole, or countersunk hole. The connecting protrusion is a cone, cuboid, cylinder, trapezoid, or stepped structure. The landing zone 4 is a hydrogel landing zone, a silicone hydrogel landing zone, or a non-HEMA material landing zone.

[0021] The landing zone 4 of this invention matches well with the sclera and lands softly on it. The optical zone 1 and transition zone 2 are made of rigid materials, ensuring improved vision for patients with high or irregular astigmatism. The landing zone 4, made of soft material, lands softly on the sclera, conforming better to it, reducing scleral pressure, decreasing complications, and increasing scleral comfort. Furthermore, this invention features permeable micropores 6 in the landing zone 4, especially at the connection between the transition zone 2 and the landing zone 4. These not only promote the flow of aqueous humor between the inner and outer surfaces of the scleral lens, providing sufficient oxygen to the cornea, but also facilitate the removal of air bubbles and metabolites from under the lens. Simultaneously, the cone-shaped micropores 6, larger on the inside and smaller on the outside, effectively prevent the backflow of metabolites or impurities from the outside of the lens, ensuring a clear and clean tear film under the lens, greatly improving the patient's wearing comfort.

[0022] This article uses specific examples to illustrate the inventive concept in detail. The description of the above embodiments is only for the purpose of helping to understand the core idea of ​​this utility model. It should be noted that any obvious modifications, equivalent substitutions or other improvements made by those skilled in the art without departing from the inventive concept should be included within the protection scope of this utility model.

Claims

1. A comfortable scleral lens, characterized in that, It includes an optical zone located at the center of the scleral lens for vision correction, a transition zone surrounding the outer periphery of the optical zone, and a landing zone surrounding the outer periphery of the transition zone. The optical zone and the transition zone are integrally formed structures, while the transition zone and the landing zone are separate structures. The optical zone and the transition zone are rigid areas, while the landing zone is a soft area. The transition zone has at least three locking holes evenly distributed along its circumference. The landing zone has corresponding connecting protrusions that match the shape of the locking holes. The transition zone and the landing zone are connected by locking holes and connecting protrusions. The landing zone also has several cone-shaped micropores with larger inner diameters and smaller outer diameters.

2. The comfortable scleral lens according to claim 1, characterized in that, The landing area is an asymmetric aspherical surface, and its radius of curvature is consistent with the corresponding radius of curvature of the wearer's sclera.

3. A comfortable scleral lens according to claim 2, characterized in that, The slot can be a through hole, a blind hole, or a countersunk hole.

4. A comfortable scleral lens according to claim 3, characterized in that, The connecting protrusion is a cone, cuboid, cylinder, trapezoid, or stepped structure.

5. A comfortable scleral lens according to claim 4, characterized in that, The diameter of the optical zone is 5.0-11.0 mm, the diameter of the transition zone is 8.0-18.0 mm, and the diameter of the landing zone is 10.0-24.0 mm.

6. A comfortable scleral lens according to claim 5, characterized in that, The landing area is a hydrogel landing area, a silicone hydrogel landing area, or a non-HEMA material landing area.

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