CN112764240B - Aspheric lens for controlling eyeball growth rate by E value and manufacturing method thereof - Google Patents

Abstract

The invention relates to an aspheric lens for controlling the growing speed of an eyeball by utilizing an E value and a manufacturing method thereof.A treatment area of the lens comprises a base arc with non-zero eccentricity, namely, the eccentricity of an image screen imaged on a retina can be enabled to be non-zero through the base arc so as to increase the peripheral defocusing area imaged on the retina and further effectively control myopia or hypermetropia, thereby achieving the aim of correcting the myopia or hypermetropia.

Description

Aspheric lens for controlling eyeball growth rate by E value and manufacturing method thereof

technical field

The present invention relates to an aspheric lens and its manufacturing method which utilizes the E value to control the growth rate of the eyeball, especially refers to the non-zero eccentricity of the image screen on the retina through the non-zero base arc of the treatment area of the lens, so as to Increase the peripheral defocus area of the image on the retina, thereby effectively controlling myopia or hyperopia.

Background technique

With the research and development and innovation of various electronic and electrical products, it has brought many conveniences to people's daily life and work. Immersed in the use of electronic products, using a large number of electronic products for a long time, whether it is office workers, students, or middle-aged and elderly people, covers a wide range, which in turn leads to the phenomenon of bowing people, and thus creates many people Eye vision loss, injury and other situations are becoming more and more serious, and the myopia population is also relatively increasing.

Furthermore, the reason why people suffer from myopia is that the light bending ability of the eye does not match 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 leads to blurred vision, so in order to correct myopia, it is necessary to reduce the light bending ability of the eye. Since the light bending ability of the cornea accounts for about 80% of the whole eye, it is only necessary to reduce the refractive power of the cornea to achieve the effect of correcting myopia. .

At present, the methods of correcting refractive errors mainly include correction with glasses, correction with contact lenses, corneal myopia surgery or correction with orthokeratology lenses. The above methods have their own advantages and disadvantages. Here, in particular Research on orthokeratology lenses, in which the orthokeratology lenses are made of high oxygen-permeable hard material. When the lens is worn on the eyeball, there will be a layer between the lens and the outer surface of the cornea of the eyeball. The uneven distribution of tears can compress the epithelial cells through the positive pressure exerted by the tears on the cornea. At the same time, if the wearer uses the eyelids to close the eyes, it will use the weight of the eyelids and lenses to counter A certain pressure is applied to the cornea. If the wear time is sufficient, the central curvature of the cornea and the central epithelial layer will gradually become thinner, so that the central cornea will be flattened, thereby reducing the refractive power of the cornea, thereby achieving the correction of myopia and even The effect of restoring normal vision.

However, although ordinary orthokeratology lenses can correct the degree of 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 used in low degrees ( Between about 50 and 400 degrees), because the base curves of orthokeratology lenses are all spherical, the spherical base curve combined with the inversion curve on one side will form insufficient space for tear accumulation, so that Epithelial cells cannot be squeezed effectively, resulting in poor myopia control.

Therefore, how to solve the deficiency and inconvenience of the above-mentioned common usage is the direction that the related industry engaged in this industry eagerly wants to study and improve.

Contents of the invention

Therefore, in view of the above shortcomings, the inventor collected relevant data, evaluated and considered in many ways, and based on years of experience accumulated in this industry, after continuous trial and modification, he designed this method that uses E value to control the growth rate of eyeballs. The invention patent holder of the aspheric lens and its manufacturing method.

The main purpose of the present invention is that the treatment area of the lens includes a base arc with a non-zero eccentricity, and the eccentricity of the image screen imaged on the retina can be made non-zero through the base arc, so as to increase the eccentricity of the image on the retina. Peripheral defocus area, and then effectively control myopia or hyperopia, so as to achieve the purpose of correcting myopia or hyperopia.

The secondary purpose of the present invention is that the surface of the lens is made by an aspherical type, which can have a better peripheral defocus area at a low power compared with the conventional spherical type orthokeratology lenses, so as to achieve better The purpose of the myopia or hyperopia control effect.

Another object of the present invention is to first 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, and then make the preset shaping lens and The amount of tear fluid between the cornea conforms to the amount of tear fluid required by the shape of the cornea to produce peripheral defocusing. With this manufacturing method, the amount of tear fluid between the lens and the cornea can easily meet the required tear fluid volume, thereby reducing manufacturing errors. This achieves the purpose of improving product yield.

The present invention provides an aspherical lens that utilizes the E value to control the growth rate of the eyeball. The lens is an orthokeratology lens with an aspherical surface and includes a treatment area for light to pass through to form an image on the retina of the eyeball, and The positioning area of the non-visual area outside the treatment area, wherein: the treatment area is a base arc that includes a non-zero eccentricity and makes the eccentricity of the image screen imaged on the retina non-zero.

The present invention further provides a method for manufacturing an aspheric lens using the E value to control the growth rate of the eyeball, which includes the following steps: (A) First, use a cornea testing machine to obtain the shape of the wearer's cornea, so as to know the shape of the cornea The amount of tear fluid needed to produce peripheral defocusing phenomenon; (B) simulate wearing a preset shaping lens on the cornea through an electronic device, and calculate the base arc and inversion arc of the cornea and the preset shaping lens (C) Correct the preset shaping lens again, the correction operation is to adjust the eccentricity of the base arc of the preset shaping lens, so that the eccentricity of the base arc is non-zero, and then make the preset shaping lens The base curve of the shaped lens is aspherical, and by adjusting the eccentricity of the base curve, the amount of tear fluid between the preset shaping lens and the cornea conforms to the amount of tear fluid required for peripheral defocusing phenomenon caused by the corneal shape; (D) It is convenient to use the lens manufacturing machine to make the lens according to the preset shape of the lens.

Description of drawings

Fig. 1 is a schematic diagram of the optical path of the present invention.

Figure 2 is a side sectional view of the present invention.

Fig. 3 is a flowchart of the present invention.

List of reference signs: 1-lens; 11-treatment area; 111-base arc; 112-reverse arc; 12-positioning area; 121-positioning arc; 122-side arc; 2-eyeball; 20-image screen; 21 - retina; 211 - peripheral out-of-focus image area; 22 - cornea.

Detailed ways

In order to achieve the above-mentioned purpose and effect, the technical means and the structure adopted by the present invention are hereby illustrated in detail with respect to the preferred embodiments of the present invention. Its features and functions are as follows, so that it can be fully understood.

Please refer to Fig. 1 and Fig. 2, which are a schematic diagram of the optical path and a side view sectional view of the present invention. It can be clearly seen from the figure that the lens 1 is an orthokeratology lens, and the surface is aspheric (aspheric), and includes A treatment area 11 for light to pass through to be imaged 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 is a base arc 111 (BC) including a non-zero eccentricity (Eccentricity; E value), and a ligand arc 111 is formed outside the base arc 111 to form a space with the eyeball 2 for reversal of tear accumulation Arc 112 (RC).

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 curve 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 curve 111 is elliptical.

Referring to Fig. 3 again, it is a flow chart of the present invention. It can be seen clearly from the figure that when the eyeglass 1 of the present invention is actually manufactured, it can include the following steps:

(A) Firstly, a cornea detection machine (not shown) can be used to obtain the shape of the cornea 22 of the wearer's eyeball 2, so as to know the amount of tear fluid required for the peripheral defocusing phenomenon caused by the shape of the cornea 22.

(B) Simulate wearing a preset shaping lens (not shown) on the cornea 22 by an electronic device (not shown in the figure), and calculate the base arc between the cornea 22 and the preset shaping lens and the amount of tear fluid between the reversal arcs.

(C) Calibrate the preset shaping lens again. The calibration operation is to adjust the eccentricity (E value) of the base curve of the preset shaping lens so that the eccentricity of the base curve is non-zero, and then the preset shaping lens The base curve of the shaped lens is aspherical, so that the amount of tear fluid between the preset shaped lens and the cornea 22 can be adjusted to the amount of tear fluid required by the shape of the cornea 22 to produce peripheral defocusing by adjusting the eccentricity of the base curve.

(D) A lens manufacturing machine (not shown in the figure) can be used to manufacture the lens 1 of the present invention according to the preset molding lens.

The cornea detection machine in the above step (A) can include parameters such as Manifest refraction, Schirmer, Axiallength, Topography, Auto-K or Corneal diameter, etc., which are related to the detection of the cornea 22 of the eyeball 2, shape or radius of curvature.

And the amount of tear fluid needed to produce the peripheral defocus phenomenon in the above step (A) can be tested through wearing experiments (that is, testers with different cornea 22 shapes can wear the orthokeratology tablets for testing, so as to know the amount of tears produced. The amount of tear fluid required for the peripheral defocus phenomenon, and a database is built, and then the data of the tear fluid amount required for the peripheral defocus phenomenon caused by various corneal 22 shapes are stored in the database) to know.

Furthermore, the electronic device in the above step (B) can be an electronic device with computing functions such as a desktop computer, a notebook computer, or a tablet computer, and the electronic device can be installed with preset orthokeratology sheet manufacturing software, That is, the software can be used to simulate wearing a preset shaping lens on the cornea 22, and a calculation formula is used to calculate the amount of tears between the base arc and the reversal arc of the cornea 22 and the preset shaping lens, and the calculation formula Can be:

Among them: BCW is the base arc width of the preset shaping lens, RCW is the reverse arc width of the preset shaping lens, f1(x) is the inner surface of the base arc of the preset shaping lens, f2(x) is the preset Shapes the inner surface of the inverted arc of the 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 area When the base arc 111 of 11, the eccentricity of the base arc 111 is non-zero, so the image screen (image shell) 20 imaged on the retina 21 is non-arc-shaped, and the non-arc-shaped image shell 20 Compared with the arc-shaped image screen, the peripheral defocused area of the image on the retina 21 can be increased, and because the peripheral defocused area is increased, compared with the general base arc of the spherical lens, its myopia or hyperopia control effect is better .

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 light passes through the base arc 111, it can be imaged on the retina 21 on the image screen. The eccentricity of 20 is between 0 and 1, that is, it is non-arc-shaped (elliptical). Compared with the preset spherical image screen A, the non-arc-shaped image screen 20 can increase the distance of imaging on the retina 21 The peripheral defocused area on the peripheral defocused image area 211 has a better myopia control effect.

The present invention 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 non-zero, so as to increase the eccentricity of 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 by an aspheric surface. Compared with the conventional spherical orthokeratology lens, it has a low power (between about 50-400 degrees) or can be used on the base curve 111 and the inversion curve. The 112 segments form more space for tears to accumulate, thereby having 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 base curve is aspherical by adjusting the eccentricity of the base curve of the preset shaping lens, so that the distance between the preset shaping lens and the cornea 22 The amount of tears between the lens 1 and the cornea 22 meets the required amount of tears for the shape of the cornea 22 to produce peripheral defocusing. Using this manufacturing method, the amount of tears between the lens 1 and the cornea 22 can easily meet the required amount of tears, so as to reduce manufacturing errors. This improves product yield.

Therefore, the above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. The present invention mainly aims at the treatment area 11 of the lens 1 to include a base curve 111 with a 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, thereby achieving the purpose of correcting myopia or hyperopia effect, so all structures and devices that can achieve the aforementioned effects should be covered by the present invention, and such simple modifications and equivalent structural changes should be equally included in the scope of protection of the claims of the present invention. To Chen Ming.

To sum up, the present invention utilizes the E value to control the growth rate of the eyeball and its manufacturing method, in order to achieve its efficacy and purpose in actual application and implementation, so the present invention is a research and development with excellent practicability.

Claims (1)

1. a kind of aspherical lens manufacture method utilizing E value to control eyeball growth rate, is characterized in that, comprises the following steps: (A) To obtain the shape of the wearer's cornea by using the cornea detection machine first, so as to know the amount of tears required for the peripheral defocus phenomenon caused by the cornea shape; (B) Simulate wearing a preset shaping lens on the cornea through an electronic device, and calculate the amount of tears between the base arc and the reversal arc of the cornea and the preset shaping lens; (C) Correct the preset shaping lens again, the correction operation is to adjust the eccentricity of the base curve of the preset shaping lens, so that the eccentricity of the base curve is non-zero, and then make the base curve of the preset shaping lens It is aspherical, so that by adjusting the eccentricity of the base arc, the amount of tear fluid between the preset shaping lens and the cornea conforms to the amount of tear fluid required for peripheral defocusing phenomenon caused by the shape of the cornea; (D) Use the lens manufacturing machine to make lenses according to the preset shape of the lenses; Wherein, the electronic device uses a calculation formula to calculate the amount of tears between the base arc and the reverse arc of the cornea and the preset shaping lens, and the calculation formula is

And the BCW is the base arc width of the preset shaping lens, RCW is the reverse arc width of the preset shaping lens, f1(x) is the base arc surface of the preset shaping lens, f2(x) is the preset shaping lens The reverse arc surface of the type lens.

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