Comfortable sclera lens

Abstract

The utility model relates to the technical field of contact lenses, and particularly discloses a comfortable sclera lens which comprises an outer surface, the inner side of the outer surface is connected with an optical area, the periphery of the optical area is sequentially provided with a first transition area, a second transition area and a landing area, the first transition area and the second transition area are connected with each other, and the optical area is not in contact with the cornea. A plurality of liquid guide grooves are evenly formed in the inner side of the landing area at intervals, the inner ends of the liquid guide grooves penetrate through the first transition area and the second transition area and extend to the edge of the optical area, through holes are formed in the positions, close to the edge of the landing area, of the bottoms of the liquid guide grooves, and the through holes penetrate through the landing area. According to the sclera lens, the plurality of liquid guide grooves are formed, tear exchange between the sclera lens and the periphery of the eyes can be achieved after the sclera lens is worn, the situation that the eyes are dry after the sclera lens is worn for a long time is relieved, meanwhile, the through holes are formed in the inner sides of the liquid guide grooves, the tear exchange efficiency can be further improved through the through holes, the oxygen permeation rate can be improved, and the comfort degree is high when the sclera lens is worn.

Description

Technical Field

[0001] The utility model relates to the technical field of contact lenses, in particular to a comfortable scleral lens. Background Art

[0002] Scleral lenses, or rigid gas-permeable scleral contact lenses, are a new type of contact lens that contacts the sclera or iris, not the cornea. Compared to standard corneal contact lenses, scleral lenses have a larger diameter and are supported by the sclera, with no contact with the cornea. Consequently, a gap exists between the lens and the cornea, eliminating mechanical friction and minimizing contact between the lens and the cornea, allowing the lens to sit like a bridge across the cornea.

[0003] Scleral lenses can improve vision and protect the cornea, providing excellent protection for patients with ocular surface diseases. However, due to their large coverage area, scleral lenses can affect the normal circulation of tears to a certain extent, making dry eyes more likely to occur after prolonged wear, and the wearing comfort is not high enough. Therefore, those skilled in the art have provided a comfortable scleral lens to address the problems raised in the above background art. Utility Model Content

[0004] The purpose of this utility model is to provide a comfortable scleral lens to solve the following technical problems:

[0005] How to ensure tear circulation of scleral lenses and improve wearing comfort.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A comfortable scleral lens comprises an outer surface, an inner side of the outer surface is connected to an optical zone, a first transition zone and a second transition zone and a landing zone are sequentially provided on the periphery of the optical zone, and the optical zone does not contact the cornea;

[0008] A plurality of liquid guiding grooves are evenly spaced on the inner side of the landing zone, and the inner ends of the liquid guiding grooves pass through the first transition zone and the second transition zone and extend to the edge of the optical zone;

[0009] A through hole is provided at the bottom of the liquid guiding groove near the edge of the landing area, and the through hole passes through the landing area.

[0010] Furthermore, the optical zone is consistent with the corneal morphology, and its diameter is the diameter of the wearer's cornea. The thickness of the gap between the highest point of the inner surface of the optical zone and the highest point of the cornea is h, and 220um≤h≤320um;

[0011] Furthermore, the outer edge of the through hole is provided with an outer fillet, and the inner edge is provided with an inner fillet;

[0012] Furthermore, the outer end of the liquid-conducting groove gradually decreases in depth along the inner end, and the outer edge of the liquid-conducting groove is provided with a notch fillet;

[0013] Furthermore, the edge of the landing area is provided with an edge chamfer, and the edge chamfer is a small raised arc with a diameter of 150 μm-300 μm and a curvature radius of 250 μm-500 μm;

[0014] Furthermore, the first transition zone is arc-shaped, with a diameter of 13.5 to 15.0 mm and a curvature radius of 12.5 to 13.5 mm;

[0015] Furthermore, the second transition zone is arc-shaped, with a diameter of 14.5 to 16.0 mm and a curvature radius of 13.5 to 14.5 mm;

[0016] Furthermore, the outer surface is a smooth spherical surface;

[0017] Beneficial effects of the utility model:

[0018] The utility model proposes a comfortable scleral lens, which is provided with a plurality of liquid guide grooves on the inner surface of the scleral lens. After wearing, the tear fluid exchange between the scleral lens and the eye area can be realized, thereby alleviating the dryness of the eyes after long-term wear. At the same time, a through hole is also provided on the inner side of the liquid guide groove, which can further improve the efficiency of tear exchange and also improve the oxygen permeability, thereby providing high comfort when wearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a front view of a comfortable scleral lens proposed by the utility model;

[0021] Figure 2 This is the outer surface of a comfortable scleral lens proposed by the present invention and its cross-sectional view in the meridian direction;

[0022] Figure 3 This is a cross-sectional view of a comfortable scleral lens proposed by the present invention;

[0023] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0024] Reference numerals:

[0025] 1. Outer surface; 2. Optical zone; 3. First transition zone; 4. Second transition zone; 5. Landing zone; 51. Edge chamfer; 6. Through hole; 61. Outer fillet; 62. Inner fillet; 7. Liquid guide groove; 71. Slot fillet. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Please see the attached Figures 1 to 4 As shown, a comfortable scleral lens in an embodiment of the present invention includes an outer surface 1, an optical zone 2 connected to the inner side of the outer surface 1, and a first transition zone 3, a second transition zone 4 and a landing zone 5 connected to each other are sequentially provided on the periphery of the optical zone 2. The optical zone 2 does not contact the cornea.

[0028] A plurality of liquid guide grooves 7 are evenly spaced on the inner side of the landing zone 5. The inner ends of the liquid guide grooves 7 pass through the first transition zone 3 and the second transition zone 4 and extend to the edge of the optical zone 2. Through the liquid guide grooves 7, the tear fluid exchange between the scleral lens and the eye area can be achieved, thereby alleviating the dryness of the eyes after long-term wear.

[0029] A through hole 6 is provided at the bottom of the liquid guide groove 7 near the edge of the landing area 5. The through hole 6 passes through the landing area 5. The through hole 6 can further improve the efficiency of tear exchange and also improve the oxygen permeability, thereby increasing the comfort when worn.

[0030] The optical zone 2 is consistent with the corneal morphology and has a diameter equal to the wearer's corneal diameter. The thickness of the gap between the highest point of the inner surface of the optical zone 2 and the highest point of the cornea is h, 220um≤h≤320um. A gap is left between the optical zone 2 and the cornea to store liquid. The optical zone 2 is consistent with the corneal morphology, so that the water is evenly distributed between the lens and the cornea.

[0031] The outer edge of the through hole 6 is provided with an outer fillet 61 , and the inner edge is provided with an inner fillet 62 . By providing the outer fillet 61 and the inner fillet 62 , sharp edges are avoided, thereby improving wearing comfort.

[0032] The outer end of the liquid guide groove 7 gradually decreases along the depth of the inner end, and the outer edge of the liquid guide groove 7 is provided with a groove rounded corner 71. The liquid guide groove 7 with the outer end gradually decreasing along the depth of the inner end facilitates the entry of external tears. The provided groove rounded corner 71 can avoid sharp edges and improve wearing comfort.

[0033] The edge of the landing area 5 is provided with an edge chamfer 51, which is a small raised arc with a diameter of 150μm-300μm and a curvature radius of 250μm-500μm. The edge chamfer 51 is provided to avoid sharp edges, improve positioning capabilities, and reduce pressure on the blood vessels of the eyeball.

[0034] The first transition zone 3 is arc-shaped, with a diameter of 13.5-15.0 mm and a curvature radius of 12.5-13.5 mm. The second transition zone 4 is arc-shaped, with a diameter of 14.5-16.0 mm and a curvature radius of 13.5-14.5 mm. A double-section arc-shaped structure transition zone is adopted, which allows for flexible adjustment of the arrow height, wider adaptability, and improved comfort.

[0035] The outer surface 1 is a smooth spherical surface.

[0036] The above describes an embodiment of the present invention in detail. However, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent application of the present invention.

Claims

1. A comfortable scleral lens comprising an outer surface (1), characterized in that: The inner side of the outer surface (1) is connected to an optical zone (2), and the outer periphery of the optical zone (2) is sequentially provided with a first transition zone (3) and a second transition zone (4) connected to each other and a landing zone (5), and the optical zone (2) does not contact the cornea; A plurality of liquid-conducting grooves (7) are evenly spaced on the inner side of the landing zone (5), and the inner ends of the liquid-conducting grooves (7) pass through the first transition zone (3) and the second transition zone (4) and extend to the edge of the optical zone (2); A through hole (6) is provided at the bottom of the liquid guiding groove (7) near the edge of the landing area (5), and the through hole (6) passes through the landing area (5).

2. The comfortable scleral lens according to claim 1, characterized in that: The optical zone (2) is consistent with the corneal morphology, and its diameter is the diameter of the wearer's cornea. The thickness of the gap between the highest point of the inner surface of the optical zone (2) and the highest point of the cornea is h, and 220um≤h≤320um.

3. The comfortable scleral lens according to claim 1, characterized in that: The outer edge of the through hole (6) is provided with an outer rounded corner (61), and the inner edge is provided with an inner rounded corner (62).

4. The comfortable scleral lens according to claim 1, characterized in that: The outer end of the liquid-conducting groove (7) gradually decreases in depth along the inner end, and the outer edge of the liquid-conducting groove (7) is provided with a groove fillet (71).

5. The comfortable scleral lens according to claim 1, characterized in that: The edge of the landing area (5) is provided with an edge chamfer (51), and the edge chamfer (51) is in the shape of a small raised arc with a diameter of 150 μm-300 μm and a curvature radius of 250 μm-500 μm.

6. The comfortable scleral lens according to claim 1, characterized in that: The first transition zone (3) is arc-shaped, with a diameter of 13.5 to 15.0 mm and a curvature radius of 12.5 to 13.5 mm.

7. The comfortable scleral lens according to claim 1, characterized in that: The second transition zone (4) is arc-shaped, with a diameter of 14.5 to 16.0 mm and a curvature radius of 13.5 to 14.5 mm.

8. The comfortable scleral lens according to claim 1, characterized in that: The outer surface (1) is a smooth spherical surface.

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