A contact lens with a flexible peripheral arc region

Abstract

The utility model discloses a kind of corneal molding lens with flexible edge arc area, it is related to corneal molding lens field, and its technical scheme main points are as follows: including by the base arc area, reverse arc area, matching arc area and edge arc area being set from middle to all around, the edge arc area is flexible edge arc area.The utility model since edge arc area is flexible edge arc area, compared with traditional corneal molding lens is more soft, thus also has better buffering capacity, avoid corneal molding lens drop and produce rigid collision, can reduce the situation of knock and break, corneal molding lens uses the BostonXO material (common name is hexafocona, main component fluorine silicon acrylate) of American doctor ton company, the oxygen permeability DK of BostonXO material=100, and oxygen permeability is more excellent, and the protection effect to eye is better.

Description

Technical Field

[0001] This utility model relates to the field of orthokeratology lenses, and more specifically, it relates to an orthokeratology lens with a flexible edge arc area. Background Technology

[0002] Orthokeratology lenses, also known as OK lenses or refractive contact lenses, are specially designed gas-permeable contact lenses. Through their specific design and mechanism, they temporarily reshape the cornea to correct vision and control the progression of myopia. Their design features include a reverse geometry—flat in the center and steep at the periphery. This design allows the lens to exert slight pressure on the cornea during wear, thereby altering its geometry. Through mechanical pressure and the massaging effect of lens movement, combined with the hydraulic pressure of tears, orthokeratology lenses flatten the central shape of the cornea, thus reducing myopia and improving vision. Orthokeratology lenses are made of gas-permeable rigid gas permeable contact lens material, which has high oxygen permeability, ensuring comfort and safety during wear.

[0003] The key technical feature of the orthokeratology lens disclosed in Chinese Patent Publication No. CN219162502U is that the orthokeratology lens has a base curve area, a reverse curve area, a fitting curve area and a side curve area respectively arranged from the center to the periphery on the side near the cornea, and the side curve area includes a first side curve area and a second side curve area, and the first side curve area is connected to the side of the fitting curve area away from the reverse curve area.

[0004] Existing orthokeratology lenses are often cut and polished from a single piece of material. Because orthokeratology lenses are hard and have thin edges, they are easily damaged and broken.

[0005] Therefore, a new solution is needed to address this problem. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a corneal reshaping lens with a flexible edge arc area.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a corneal reshaping lens with a flexible edge arc region, comprising a base arc region, a reverse arc region, a fitting arc region, and an edge arc region arranged sequentially from the center outwards. The diameter d0 of the base arc region is 5.20mm-7.00mm, and the radius of curvature r0 is 7.34mm-10.71mm; the diameter d1 of the reverse arc region is 6.00mm-8.00mm, and the radius of curvature r1 is 5.29mm-9.22mm; the fitting arc region includes a first fitting arc region connected to the reverse arc region and a second fitting arc region connected to the edge arc region. The first fitting arc region has a diameter d2 of 7.00mm-9.60mm and a radius of curvature r2 of 6.93mm-9.80mm; the second fitting arc region has a diameter d3 of 8.00mm-11.20mm and a radius of curvature r3 of 7.26mm-9.90mm; the edge arc region is a flexible edge arc region with a diameter d4 of 9.60mm-11.80mm and a radius of curvature r4 of 9.54mm-12.41mm. The inner edge of the flexible edge arc region is integrally formed with a connecting edge, and the upper surface of the fitting arc region is provided with a fitting groove to accommodate the connecting edge, and the connecting edge is fixed in the fitting groove.

[0008] The present invention is further configured such that the curvature of the upper surface of the connecting edge is consistent with the curvature of the upper surface of the matching arc area, and the upper surface of the connecting edge and the upper surface of the matching arc area transition smoothly.

[0009] The present invention is further configured such that the cross-section of the bottom of the fitting groove and the cross-section of the lower surface of the connecting edge have the same shape and are curved.

[0010] The present invention is further configured such that: the fitting groove includes a deep groove region located near the reversing arc region and a shallow groove region located away from the reversing arc region, wherein the groove depth of the deep groove region is greater than the groove depth of the shallow groove region.

[0011] The present invention is further configured such that the flexible edge arc area is made of soft silicone material.

[0012] The present invention is further configured such that the base arc region, the reverse arc region, the matching arc region and the edge arc region are all made of BostonXO material with an oxygen permeability DK=100.

[0013] In summary, this utility model has the following beneficial effects: because the edge arc area is a flexible edge arc area, it is softer than traditional orthokeratology lenses, and therefore has better cushioning ability, avoiding rigid collisions caused by the orthokeratology lens falling, and reducing the possibility of bumps and breakage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 Enlarged schematic diagram of part A in the middle.

[0016] In the diagram: 1. Base arc area; 2. Reversal arc area; 3. First fitting arc area; 4. Second fitting arc area; 5. Flexible edge arc area; 6. Connecting edge; 7. Fitting groove; 8. Deep groove area; 9. Shallow groove area. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Example

[0018] A type of orthokeratology lens with a flexible edge arc area, such as Figure 1 As shown, it includes a base arc region 1, a reverse arc region 2, a matching arc region, and an edge arc region arranged from the center outwards, wherein:

[0019] The diameter d0 of the base arc region 1 ranges from 5.20mm to 7.00mm, and the radius of curvature r0 of the base arc region 1 ranges from 7.34mm to 10.71mm. The appropriate diameter and radius of curvature of the base arc region 1 can be selected by the ophthalmologist according to the patient's corneal curvature and eye size.

[0020] The diameter d1 of the reverse arc region 2 ranges from 6.00mm to 8.00mm, and the radius of curvature r1 of the reverse arc region 2 ranges from 5.29mm to 9.22mm. The ophthalmologist can select the appropriate diameter and radius of curvature of the reverse arc region 2 according to the patient's corneal curvature and eye size.

[0021] The fitting arc area includes a first fitting arc area 3 and a second fitting arc area 4. The first fitting arc area 3 is connected to the reverse arc area 2, and the second fitting arc area 4 is connected to the edge arc area. The fitting arc area is also called the positioning arc area, which is used for lens positioning and has the function of stabilizing and centering the lens. The design of the two fitting arcs, the first fitting arc area 3 and the second fitting arc area 4, can improve the center positioning of the orthokeratology lens and solve problems such as orthokeratology lens misalignment and poor fitting. The diameter d2 of the first fitting arc area 3 ranges from 7.00mm to 9.60mm, and the curvature of the first fitting arc area 3 is... The radius r2 ranges from 6.93mm to 9.80mm. The ophthalmologist can select the appropriate diameter and radius of curvature of the first matching arc zone 3 according to the patient's corneal curvature and eye size. The diameter d3 of the second matching arc zone 4 ranges from 8.00mm to 11.20mm, and the radius of curvature r3 of the second matching arc zone 4 ranges from 7.26mm to 9.90mm. The ophthalmologist can select the appropriate diameter and radius of curvature of the second matching arc zone 4 according to the patient's corneal curvature and eye size.

[0022] The diameter d4 of the edge arc zone ranges from 9.60mm to 11.80mm, and the radius of curvature r4 ranges from 9.54mm to 12.41mm. The ophthalmologist can select the appropriate edge arc zone diameter and radius of curvature based on the patient's corneal curvature and eye size. The edge arc zone is a flexible edge arc zone 5. Because the edge arc zone 5 is flexible, it is softer than traditional orthokeratology lenses, and therefore has better cushioning capabilities, avoiding rigid impacts when the orthokeratology lens falls, and reducing the possibility of breakage. The flexible edge arc zone 5 is made of soft silicone, so it is less irritating to the eye when the orthokeratology lens is worn.

[0023] like Figure 1 and Figure 2 As shown, a connecting edge 6 is integrally formed on the inner edge of the flexible arc region 5. A fitting groove 7 for accommodating the connecting edge 6 is formed on the upper surface of the fitting arc region. The connecting edge 6 is fixed in the fitting groove 7. Through the cooperation of the connecting edge 6 and the fitting groove 7, the flexible arc region 5 can be well fixed to the fitting arc region. Furthermore, the cross-sectional shape of the bottom of the fitting groove 7 and the cross-sectional shape of the lower surface of the connecting edge 6 are consistent and curved. The connecting edge 6 and the flexible arc region 5 are formed by pouring liquid silicone into the fitting groove 7 and the outer edge of the fitting arc region, solidifying and grinding. The fitting groove 7 increases the fixing area of ​​the inner wall of the fitting groove 7 and the connecting edge 6, thereby improving the connection strength between the connecting edge 6 and the inner wall of the fitting groove 7. Furthermore, the fitting groove 7 includes a deep groove area 8 located near the reversal arc area 2 and a shallow groove area 9 located away from the reversal arc area 2. The groove depth of the deep groove area 8 is greater than the groove depth of the shallow groove area 9. The deep groove area 8 is located on the inner side of the orthokeratology lens, which makes the bonding strength between the inner edge of the connecting edge 6 and the fitting arc area higher, and the connecting edge 6 and the flexible edge arc area 5 are less likely to separate from other parts of the orthokeratology lens.

[0024] like Figure 1 and Figure 2 As shown, the curvature of the upper surface of the connecting edge 6 is consistent with the curvature of the upper surface of the fitting arc area. The upper surface of the connecting edge 6 and the upper surface of the fitting arc area transition smoothly, so that the upper surface of the orthokeratology lens is continuous and flat when worn, making it more comfortable to wear.

[0025] Orthokeratology lenses use BostonXO material (generic name: hexafocona, main component of which is fluorosilicone acrylate) from the American company Boston Scientific. BostonXO material has an oxygen permeability of DK=100, which is excellent and provides better protection for the eyes.

[0026] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A corneal reshaping lens with a flexible edge arc region, comprising a base arc region (1), a reverse arc region (2), a fitting arc region, and an edge arc region arranged sequentially from the center outwards, characterized in that: The diameter d0 of the base arc region (1) is 5.20mm-7.00mm, and the radius of curvature r0 is 7.34mm-10.71mm; the diameter d1 of the reverse arc region (2) is 6.00mm-8.00mm, and the radius of curvature r1 is 5.29mm-9.22mm; the fitting arc region includes a first fitting arc region (3) connected to the reverse arc region (2) and a second fitting arc region (4) connected to the side arc region, wherein the diameter d2 of the first fitting arc region (3) is 7.00mm-9.60mm, and the radius of curvature r2 is 6.93mm. m-9.80mm, the diameter d3 of the second fitting arc area (4) is 8.00mm-11.20mm, and the radius of curvature r3 is 7.26mm-9.90mm; the edge arc area is a flexible edge arc area (5) with a diameter d4 of 9.60mm-11.80mm and a radius of curvature r4 of 9.54mm-12.41mm. The inner edge of the flexible edge arc area (5) is integrally formed with a connecting edge (6). The upper surface of the fitting arc area is provided with a fitting groove (7) to accommodate the connecting edge (6). The connecting edge (6) is fixed in the fitting groove (7).

2. The orthokeratology lens with a flexible edge arc area according to claim 1, characterized in that: The curvature of the upper surface of the connecting edge (6) is consistent with the curvature of the upper surface of the matching arc area, and the upper surface of the connecting edge (6) and the upper surface of the matching arc area transition smoothly.

3. The orthokeratology lens with a flexible edge arc area according to claim 1, characterized in that: The cross-section of the bottom of the fitting groove (7) and the cross-section of the lower surface of the connecting edge (6) have the same shape and are curved.

4. A corneal reshaping lens with a flexible edge arc area according to claim 3, characterized in that: The fitting groove (7) includes a deep groove region (8) located near the reversing arc region (2) and a shallow groove region (9) located away from the reversing arc region (2), wherein the groove depth of the deep groove region (8) is greater than the groove depth of the shallow groove region (9).

5. A corneal reshaping lens with a flexible edge arc area according to claim 1, characterized in that: The flexible edge arc area (5) is made of soft silicone.

6. A corneal reshaping lens with a flexible edge arc area according to claim 1, characterized in that: The base arc region (1), the reverse arc region (2), the matching arc region, and the edge arc region are all made of BostonXO material with an oxygen permeability of DK=100.

Images