TWM598958U - Aspheric lens that uses E value to control the growth rate of eyeballs - Google Patents

Abstract

This creation is about an aspheric lens that uses the E value to control the growth rate of the eyeball. The treatment area of the lens includes a base arc with a non-zero eccentricity, through which the image screen eccentricity of the image on the retina can be made Non-zero, to increase the peripheral defocus area imaged on the retina, thereby effectively controlling myopia or hyperopia, thereby achieving the purpose of correcting myopia or hyperopia.

Description

Aspheric lens that uses E value to control the growth speed of the eyeball

This creation is about an aspheric lens that uses the E value to control the growth rate of the eyeball, especially the treatment area of the lens makes the eccentricity of the image screen on the retina non-zero through a base arc with a non-zero eccentricity to increase the image on the retina. The peripheral defocusing area of the lens can effectively control myopia or hyperopia.

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 caused 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 scope is also quite wide, and then the phenomenon of bowing people is derived, and therefore many People's eyesight loss and injuries are becoming more serious, and the myopia population is relatively increasing.

Furthermore, the reason why people have myopia is caused by the mismatch between the tortuous ability 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 imaging point of the visual object 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 methods of correcting refractive errors are wearing glasses for correction and wearing invisible There are several methods of lens correction, corneal myopia surgery or wearing orthokeratology lenses. The above methods have their own advantages and disadvantages. Here, the research is especially aimed at orthokeratology lenses, where the orthokeratology lenses are made of high transparency. It is 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. The positive pressure exerted by the tear fluid on the cornea can reduce The epithelial cells are squashed. At the same time, if the wearer uses the eyelid to close the eyes, 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, although general orthokeratology lenses can correct myopia, some people cannot effectively control the progression of myopia by wearing orthokeratology lenses, so that the degree of myopia will continue to grow, and orthokeratology lenses are in low power ( (Between about 50-400 degrees), because the base curve of the orthokeratology lens is spherical, the space formed by the spherical base curve with the reversal arc on one side for the accumulation of tears will be insufficient, so that Inability to effectively squeeze epithelial cells, resulting in poor myopia control.

Therefore, how to solve the above-mentioned deficiencies and inconveniences of conventional use is the direction that relevant industries in this industry urgently 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 kind of E-value to control the speed of eyeball growth. The patentee of the new type of aspheric lens.

The main purpose of this creation is that the treatment area of the lens includes eccentricity A non-zero base arc can make the image screen eccentricity of the image on the retina non-zero through the base arc to increase the peripheral defocus area of the image on the retina, thereby effectively controlling myopia or hyperopia, thereby achieving The purpose of correcting myopia or hyperopia.

The secondary purpose of this creation is that the surface of the lens is made through an aspherical type. Compared with the conventional spherical type of corneal shaping lens, it can have a better peripheral defocus area at low power to achieve better The purpose of the control effect of myopia or hyperopia.

Another purpose of this creation is to detect the shape of the cornea when the lens is manufactured, and then adjust the eccentricity of the base curve of the preset shaping lens to make the base curve aspherical, so that the preset shaping lens and The amount of tears between the cornea meets the amount of tears required for the shape of the cornea to produce peripheral defocusing. This manufacturing method can easily make the amount of tears between the lens and the cornea really meet the required amount of tears, so as to reduce manufacturing errors. This achieves the purpose of improving product yield.

1‧‧‧Lens

11‧‧‧Treatment area

111‧‧‧Base arc

112‧‧‧Reverse arc

12‧‧‧Locating area

121‧‧‧Positioning arc

122‧‧‧Side arc

2‧‧‧Eyeball

20‧‧‧Video screen

21‧‧‧Retina

211‧‧‧Out-of-focus image area around

22‧‧‧Cornea

The first picture is a schematic diagram of the light path of this creation.

The second picture is a cross-sectional side view of this creation.

The third picture is the flow chart of this creation.

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

Please refer to the first and second figures, which are the schematic diagram of the light path and the cross-sectional side view of this creation. It can be clearly seen from the figure that the lens 1 is a corneal shaping lens and the surface is aspherical ( aspheric), and includes a treatment area 11 through which light passes for imaging at the retina 21 of the eyeball 2, and a positioning area 12 of the non-visual area outside the treatment area 11, wherein: the treatment area 11 includes eccentricity (Eccentricity; E value ) A non-zero base arc 111 (BC), and a matching base arc 111 is formed on the outside of the base arc 111 to form a gap between the eyeball 2 and a reverse arc 112 (RC) for the accumulation of tears.

The positioning area 12 includes a positioning arc 121 (AC) for stably fixing the lens 1 on the eyeball 2 and a side arc 122 (PC) located outside the positioning arc 121.

Moreover, the eccentricity of the base arc 111 of the treatment area 11 of the lens 1 is non-zero, and when the eccentricity is between 0 and 1, the surface of the base arc 111 is elliptical.

Please refer to the third figure again, which is the flow chart of this creation. It can be clearly seen from the figure that when the lens 1 of this creation is actually manufactured, the following steps can be included:

(A) is that a cornea inspection machine (not shown in the figure) can be used to obtain the shape of the wearer's eyeball 2 and the cornea 22, so as to know the amount of tears required for the shape of the cornea 22 to produce peripheral defocusing.

(B) Use an electronic device (not shown in the figure) to simulate wearing a preset shaping lens (not shown in the figure) on the cornea 22, and calculate the base curve of the cornea 22 and the preset shaping lens And reverse the amount of tears between arcs.

(C) Perform a calibration operation on the preset plastic lens. The calibration operation is to adjust the eccentricity (E value) of the base arc of the preset plastic lens to make the eccentricity of the base arc non-zero, and then make the preset plastic The base curve of the shaped lens is aspherical, whereby the eccentricity of the base curve can be adjusted to make the amount of tear fluid between the predetermined shaped lens and the cornea 22 meet the amount of tear fluid required for the shape of the cornea 22 to produce peripheral defocusing.

(D) A lens manufacturing machine (not shown in the figure) can be used to produce the lens 1 of this creation according to the preset shaping lens.

The corneal inspection machine in the above step (A) is a machine that can include parameters such as Manifest refraction, Schirmer, Axial Length, Topography, Auto-K, or Corneal diameter for detecting the refractive power, shape or radius of curvature of the cornea 22 of the eyeball 2 .

And the amount of tears required to produce peripheral defocusing phenomenon in the above step (A) can be obtained through a wearing experiment (that is, through a tester with different corneal 22 shapes to wear the corneal shaping sheet for the test, to know the production The amount of tears required for the peripheral defocusing phenomenon is established, and a database is built so that the database contains data on the amount of tears required for the peripheral defocusing phenomenon caused by various corneal 22 shapes).

Furthermore, the electronic device in the above step (B) can be an electronic device with arithmetic functions such as a desktop computer, a notebook computer or a tablet computer, and the electronic device can be installed with the preset corneal plastic sheet manufacturing software. The software can be used to simulate wearing a preset plastic lens on the cornea 22, and the calculation formula can be used to calculate the amount of tears between the base and reverse arcs of the cornea 22 and the preset plastic lens, and the calculation formula Can be:

Among them: BCW is the base arc width of the preset plastic lens, RCW is the reverse arc width of the preset plastic lens, f1(x) is the inner surface of the base arc of the preset plastic lens, f2(x) is the preset Set the reversal arc inner surface of the shaping lens.

When the user wants to correct myopia or hyperopia (that is, the imaging distance of the eyeball 2 is too long or too short), the lens 1 can be worn on the eyeball 2 first, so that the light passes through the treatment area 11 of the lens 1, and when the light passes through the treatment When the base arc 111 of the area 11, the eccentricity of the base arc 111 is non-zero, so that the image shell 20 imaged on the retina 21 is non-circular, and its non-circular image screen 20 Compared with the arc-shaped image screen, the peripheral defocus area of the image on the retina 21 can be increased, and because the peripheral defocus area is increased, it has a better myopia or hyperopia control effect compared to the general lens with a spherical base arc. good.

Furthermore, when the user wants to correct myopia, the eccentricity of the base arc 111 of the treatment area 11 can be set between 0 and 1. When the light passes through the base arc 111, the image can be imaged on the retina 21. The eccentricity of 20 is between 0 and 1, that is, it is non-circular (elliptical). Compared with the default spherical image screen A, the non-circular image screen 20 can increase the image on the retina 21 The peripheral out-of-focus area on the peripheral out-of-focus image area 211 has a better myopia control effect.

This creation has the following advantages:

(1) When the lens 1 is worn on the eyeball 2, because the eccentricity of the base arc 111 of the treatment area 11 is non-zero, the eccentricity of the image screen 20 imaged on the retina 21 can be made non-zero to increase the image on the retina The peripheral defocus area on 21 can effectively control the speed of eye axis change (lengthening or shortening), thereby effectively controlling myopia or hyperopia, thereby achieving the effect of correcting myopia or hyperopia.

(2) The surface of the lens 1 is made through an aspherical type, which is lower in power (between about 50 and 400 degrees) or can be used in comparison with conventional spherical keratoplastic lenses. The base arc 111 and the reversal arc 112 form more space for the accumulation of tear fluid, and thus can have a better peripheral defocus area, thereby having a better myopia or hyperopia control effect.

(3) When the lens 1 is manufactured, the shape of the cornea 22 is detected first, and then the eccentricity of the base curve of the preset molding lens is adjusted to make the base curve aspherical, and then the preset molding lens and the cornea 22 The amount of tears between the lens 1 and the cornea 22 can easily match the amount of tears required by the shape of the cornea 22 to produce the peripheral defocusing phenomenon, so as to reduce manufacturing errors. To improve product yield.

Therefore, the above description is only a preferred embodiment of this creation, and does not limit the scope of the patent of this creation. This creation is mainly aimed at the treatment area 11 of the lens 1 including the base arc 111 with non-zero eccentricity. The base arc 111 can be used to make the eccentricity of the image screen 20 imaged on the retina 21 non-zero, so as to increase the peripheral defocus area imaged on the retina 21, thereby effectively controlling myopia or hyperopia, so as to correct myopia. Or the effect of farsightedness, so all structures and devices that can achieve the aforementioned effects should be covered by this creation. Such simple modifications and equivalent structural changes should be included in the scope of the patent for this creation for the same reason, and they should be included in the scope of this creation. .

In summary, this creation uses the E value to control the growth rate of the eyeball in order to achieve its efficacy and purpose in actual application and implementation. Therefore, this creation is a research and development with excellent practicality and is in line with new patents. For the application requirements, Yan submits an application in accordance with the law. I hope that the review committee will grant the approval of 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 feel free to write instructions, and the creators will do their best to cooperate. Poop.

1‧‧‧Lens

11‧‧‧Treatment area

111‧‧‧Base arc

112‧‧‧Reverse arc

12‧‧‧Locating area

121‧‧‧Positioning arc

122‧‧‧Side arc

2‧‧‧Eyeball

20‧‧‧Focus

21‧‧‧Retina

211‧‧‧Out-of-focus image area around

22‧‧‧Cornea

Claims (4)

An aspheric lens that uses the E value to control the growth rate of the eyeball. The lens is a keratoplasty lens with an aspheric surface, and includes a treatment area for light to pass through to image the retina of the eyeball, and a non-spherical lens outside the treatment area. The positioning area of the visual area, where: the treatment area is a base arc including a non-zero eccentricity and making the image screen eccentricity non-zero on the retina. As described in the first item of the scope of patent application, the aspheric lens using E value to control the growth speed of the eyeball, wherein the base arc of the treatment area is formed with a matching base arc to form a gap with the eyeball for the accumulation of tear fluid. As described in item 1 of the scope of patent application, the aspheric lens using E value to control the growth speed of the eyeball, wherein the eccentricity of the base arc of the treatment area is between 0 and 1, and the surface of the base arc is elliptical. The aspheric lens that uses the E value to control the growth speed of the eyeball as described in item 1 of the scope of the patent application, wherein the positioning area includes a positioning arc for the lens to be firmly fixed on the eyeball, and a side arc located outside the positioning arc.

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