TWM603973U - Positioning structure for multi-arc and multi-section orthokeratology contact lens - Google Patents

Abstract

This creation is related to a multi-arc and multi-segment keratoplastic contact lens positioning structure. The center of the inner surface of the lens includes a base arc, and a reversing arc is provided on the outside of the base arc and facing outward. There is a matching arc positioned on the cornea of the eyeball, and a side arc is arranged on the outer side of the matching arc, and the area in contact with the matching arc on the corneal surface forms a positioning area, and the positioning area is divided into A complex number of blocks, and a complex positioning block corresponding to the position of the plurality of blocks in the matching arc is formed with a plurality of positioning blocks matching the curvature value of the plurality of blocks in the positioning area, because the plurality of positioning blocks of the matching arc conforms to the curvature of the cornea Value, so that the lens can be positioned stably on the eyeball, so when the wearer’s eyelid is closed, the lens is not prone to axial rotation and inaccurate alignment, which can ensure that the base curve of the lens does exert pressure on the eyeball On the surface of the cornea, the effect of improving and reducing the degree of myopia or eliminating the stability of myopia can be achieved.

Description

Multi-arc and multi-segment corneal plastic contact lens positioning structure

This creation is about a multi-arc and multi-segmented corneal shaping contact lens positioning structure, especially the plural positioning blocks of the lens matching the arc is in line with the curvature of the cornea, so that the lens can be stably positioned on the eyeball, so that The lens is not prone to axial rotation and inaccurate alignment, so that the base curve of the lens is surely squeezed on the corneal surface of the eyeball.

By the way, with the development and innovation of various electronic and electrical products, it has brought people a lot of convenience in daily life and work, especially the advent of a large number of electronic products, and has led to the popularization of applications in communications and the Internet. People are immersed in the field of use of electronic products, and a large number of electronic products are used for a long time, whether it is office workers, student groups or middle-aged and elderly people, etc., the coverage is also quite wide, and then the phenomenon of bowing people is derived, and therefore many People’s eyesight loss and injuries are getting worse, and the myopia population is relatively increasing.

Furthermore, the reason why people have myopia is caused by the mismatch between the tortuosity of the eye and the length of the eye. It may be that the eye axis is too long or the corneal arc is too steep, causing the visual imaging point to fall in front of the retina. It causes blurring of vision when imaging, so in order to correct myopia, it is necessary to reduce the tortuosity of the eye's light. Since the cornea's light tortuosity accounts for about 80% of the entire eye, the effect of correcting myopia can be achieved by reducing the refractive power of the cornea. .

At present, the main ways to correct refractive errors are to wear glasses to correct and wear invisible There are several methods of lens correction, corneal myopia surgery or wearing orthokeratology. Each of the above methods has its advantages and disadvantages. Here, the research is especially aimed at orthokeratology. Among them, the orthokeratology is made of high permeability. Made of oxygen-hard material, when the lens is worn on the eyeball, a layer of unevenly distributed tear fluid will be sandwiched between the lens and the outer surface of the cornea of the eyeball, and the positive pressure exerted by the tear fluid on the cornea can reduce The epithelial cells are squashed, and at the same time, if the wearer uses the eyelid to close the eye, it will exert a certain pressure on the cornea by the weight of the eyelid and the lens. If the wear time is sufficient, the central curvature of the cornea can be gradually increased. Flatten and gradually thin the central epithelial layer to flatten the center of the cornea, thereby reducing the refractive power of the cornea, thereby achieving the effect of correcting myopia and even returning to normal vision.

However, in general, the corneal surface of the eye is not a complete and smooth curved surface, so when the orthokeratology lens is worn on the eye, it is prone to rotation or misalignment, so that the base curve of the orthokeratology lens will apply to the cornea. When a certain amount of pressure is applied, the squeeze will be inaccurate, resulting in the inability to correct the degree of vision back to normal vision.

Therefore, how to solve the above-mentioned deficiencies and inconveniences of conventional use is the direction that relevant industries in this industry want to study and improve.

Therefore, in view of the above-mentioned deficiencies, the creators collected relevant information, evaluated and considered from many parties, and based on years of experience in this industry, through continuous trials and revisions, they began to design this multi-arc and multi-segment corneal plastic. The patentee of the new type contact lens positioning structure.

The main purpose of this creation is that the center of the inner surface of the lens includes a base arc that passes through the lens and the cornea of the eyeball to exert a positive pressure on the base arc on the corneal surface, and an inversion is provided on the outside of the base arc. Arc, and the reversing arc has a suitable arc positioned on the cornea facing outward , And then set a side arc on the outer side of the fitting arc, and the area in contact with the fitting arc on the corneal surface is formed with a positioning zone, and the positioning zone is divided into plural blocks, and the fitting arc corresponds to the plural zone The block position is formed with a plurality of positioning blocks conforming to the curvature values of the plurality of blocks in the positioning zone. Because the complex positioning blocks of the matching arc conform to the curvature of the cornea, the lens can be positioned stably on the eyeball. When the eyelid of the wearer is closed, the lens is not prone to axial rotation and incorrect alignment, which can ensure that the tear between the base curve of the lens and the cornea exerts a positive pressure on the corneal surface of the eyeball. So as to achieve the purpose of improving and reducing the degree of myopia or eliminating the stability of the degree of myopia.

1: lens

11: base arc

12: Reverse arc

13: fit arc

131: positioning block

14: Edge arc

2: eyeball

21: Cornea

211: positioning area

2111: block

[Picture 1] is a top sectional view of this creative lens.

[Picture 2] is a schematic diagram of this creative eyeball.

[Picture 3] is the flow chart of this creation.

In order to achieve the above-mentioned purpose and effect, the technical means and structure used in this creation are described in detail below with the preferred embodiment of this creation, for the benefit of a complete understanding.

Please refer to Figures 1, 2 and 3, which are the top-down cross-sectional view, schematic diagram and flow chart of the eyeball of this creative lens. It can be clearly seen from the figure that the lens 1 is a corneal plastic that can be worn on the eyeball 2. The lens 1 is made of a highly oxygen-permeable material. The inner surface of the lens 1 is attached to the surface of the cornea 21 of the eyeball 2, and the center of the inner surface of the lens 1 includes a transparent lens 1 and The tears between the cornea 21 (not shown in the figure) apply a positive pressure to the basal arc 11 (BC) on the surface of the cornea 21, and the outer side of the basal arc 11 is provided with inverted arcs 12 facing outward. (RC), and the reversing arc 12 is provided with a matching arc 13 (AC) positioned on the cornea 21 outwardly, and then a side arc 14 (PC) is provided on the outer side of the matching arc 13 and the surface of the cornea 21 A positioning area 211 is formed on the area in contact with the matching arc 13 and a plurality of blocks 2111 are divided in the positioning area 211, and an even number is formed in the matching arc 13 at positions corresponding to the plurality of blocks 2111 (for example: 2, 4, 6, 8, 10, or 12) and the complex positioning blocks 131 conforming to the curvature value of the complex block 2111.

Furthermore, the preset arc of the base arc 11 of the lens 1 is greater than the horizontal arc of the cornea 21 of the eyeball 2 (that is, the arc of the base arc 11 is flatter than the horizontal arc of the cornea 21), because the arc of the base arc 11 is greater than The curvature of the cornea 21, when the lens 1 is worn on the eyeball 2, the tear fluid between the base arc 11 and the cornea 21 can generate a positive pressure on the epithelial cells of the cornea 21; in addition, the lens 1 is reversed The arc 12 is used for storing tear fluid, and the negative pressure provided by the tear fluid can achieve the effect of improving the positioning of the lens 1 on the eyeball 2.

The side arc 14 of the aforementioned lens 1 preferably has a slightly raised edge design, which can squeeze tears during blinking to promote the circulation of tears in the lens 1, and the lens 1 and the eyeball 2 can be made by tear circulation. The cornea 21 is continuously lubricated and oxygen is brought into it to improve the comfort and wearability during wearing.

Moreover, the curvature of the fitting arc 13 of the lens 1 adjacent to the nose is smaller than the curvature of the opposite side of the nose.

In addition, the inner surface of the aforementioned lens 1 is aspherical.

When the lens 1 of this creation is actually produced, the following steps may be included:

(A) The cornea 21 of the eyeball 2 can be measured through the corneal map device to obtain the complex radian value in the cornea 21.

(B) And use the electronic device to calculate the curvature value of the cornea 21 of the eyeball 2. In the cornea 21, the positioning area 211 conforming to the fitting arc 13 of the lens 1 to be produced is first divided into a plurality of blocks 2111, and by A preset algorithm is used to calculate the complex radian value of the cornea 21 in each block 2111 into a curvature value.

(C) The lens 1 is then produced according to the curvature value of the complex block 2111 through the lens making machine, so that the fitting arc 13 of the lens 1 is formed with a complex positioning block 131 that conforms to the curvature value of the complex block 2111. Then the manufacture of the lens 1 is completed.

How the cornea map instrument in the above step (A) measures the cornea 21 of the eyeball 2 to obtain the complex radian value in the cornea 21 is the scope of the conventional technology, so the internal electronic parts and circuit design will not be discussed. Go into details for understanding.

Furthermore, the electronic device in the above step (B) can be a desktop computer, a notebook computer, an industrial computer or other electronic devices with computing functions.

In addition, the electronic device in the above step (B) can divide the positioning area 211 of the cornea 21 into eight blocks 2111. In the process of dividing, the positioning area 211 of the cornea 21 can be first divided in the X and Y axes. Divided into four blocks 2111, and then divided by 45° of the four blocks, and then the positioning area 211 is divided into eight blocks 2111. The eight blocks 2111 can be used to match the lens 1 The suitable arc 13 forms eight positioning blocks 131, and the eight positioning blocks 131 can be used to improve positioning.

However, the electronic device in the above step (B) can first use the center point of the cornea 21 of the eyeball 2 as the origin (0, 0) of the coordinate system (X, Y), and the preset algorithm can be the following formula :

Where z represents the distance between the Y direction and the origin, c represents the curvature of the center of the cornea 21, r represents the distance between the X direction and the coordinate origin, k represents asphericity, and k=-e ² , and e is the eccentricity rate.

In addition, the lens manufacturing machine in the above step (C) can be an aspherical surface manufacturing machine, which uses aspherical surface manufacturing methods to produce lenses 1. However, there are many internal devices and components in the relevant lens manufacturing machine, which is not the case. The key point of the creation, so I won't repeat it, so I can understand.

When this creation is actually worn and used, the inspector can first measure the cornea 21 of the wearer’s eyeball 2 through a corneal map instrument to obtain the complex radian value in the wearer’s cornea 21. The corneal map instrument That is, the plural radian values are transmitted to the electronic device. At this time, the fitting person can use the electronic device to calculate the curvature value, so that the cornea 21 is divided into the positioning area 211 of the matching arc 13 of the lens 1 to be made The complex curvature value of the cornea 21 in each block 2111 is calculated into a curvature value by a preset algorithm, and the electronic device transmits the complex curvature value in the cornea 21 to the lens making machine The lens making machine will produce the lens 1 according to the curvature value of the complex block 2111, so that the fitting arc 13 of the lens 1 is formed with a complex positioning block 131 that matches the curvature value of the complex block 2111, and The wearer can put the manufactured lens 1 on the eyeball 2 and make the inner surface of the lens 1 contact the surface of the cornea 21 of the eyeball 2. At this time, it is formed with a plurality of positioning blocks 131 due to the fitting arc 13 , And the plurality of positioning blocks 131 conform to the curvature value on the cornea 21, so that the lens 1 can be stably positioned on the eyeball 2, so when the wearer goes to bed at night and closes the eyelids (not shown in the figure), the Lens 1 is not prone to axial rotation and inaccurate alignment In addition, the tear fluid between the base curve 11 of the lens 1 and the cornea 21 can be sure to exert a positive pressure on the epithelial cells at the center of the cornea 21 surface of the eyeball 2, and the epithelial cells on the surface of the cornea 21 are squeezed by the tear fluid. Will make its central curvature gradually become relatively flat, thereby making the central epithelial layer of the cornea 21 thinner, thereby reducing the refractive power of the cornea 21, so that the visual imaging point moves toward the retina of the eyeball 2 (not shown) , So as to achieve the effect of improving or reducing the degree of myopia or eliminating the stability of myopia.

The above is only the preferred embodiment of this creation, and it does not limit the patent scope of this creation. Therefore, all simple modifications and equivalent structural changes made by using this creation specification and schematic content should be included in the same reasoning Within the scope of the patent of this creation, it is to Chen Ming.

In summary, this creation of the multi-arc and multi-segment corneal shaping contact lens positioning structure can indeed achieve its efficacy and purpose when it is actually applied and implemented. Therefore, this creation is a research and development with excellent practicability. For the new patent application requirements, Yan filed an application in accordance with the law. I hope that the review committee will grant this case as soon as possible to protect the creators’ hard research and development and creation. If the review committee of the Bureau has any doubts, please send me instructions and the creators will do their best to cooperate. Really feel good.

1: lens

11: base arc

12: Reverse arc

13: fit arc

131: positioning block

14: Edge arc

Claims (3)

A multi-arc and multi-segment corneal shaping contact lens positioning structure. The center of the inner surface of the lens includes a base arc that passes through the tear fluid between the lens and the cornea of the eyeball to exert a positive pressure on the corneal surface. The outer side of the arc is provided with a reversal arc, and the outer side of the reversing arc is provided with a matching arc positioned on the cornea, and a side arc is provided on the outer side of the matching arc and is in contact with the matching arc on the surface of the cornea. The area of is formed with a positioning area, and the positioning area is divided into a plurality of blocks, and the matching arc corresponding to the position of the plurality of blocks is formed with a plurality of positioning blocks conforming to the curvature values of the plurality of blocks in the positioning area. For example, the multi-arc and multi-segment keratoplastic contact lens positioning structure described in item 1 of the scope of patent application, wherein the number of positioning blocks of the matching arc is an even number. For example, the multi-arc and multi-segment keratoplastic contact lens positioning structure described in item 1 of the scope of patent application, wherein the inner surface of the lens is aspherical.

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