CN112764240B

CN112764240B - Aspheric lens using E value to control growth rate of eyeball and manufacturing method thereof

Info

Publication number: CN112764240B
Application number: CN201911067300.0A
Authority: CN
Inventors: 吴怡璁
Original assignee: Brighten Optix Corp
Current assignee: Brighten Optix Corp
Priority date: 2019-11-04
Filing date: 2019-11-04
Publication date: 2022-11-25
Anticipated expiration: 2039-11-04
Also published as: CN112764240A

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 using E value to control growth rate of eyeball and manufacturing method thereof

Technical Field

The invention relates to an aspheric lens for controlling the growth speed of an eyeball by utilizing an E value and a manufacturing method thereof, in particular to an aspheric lens for controlling the growth speed of the eyeball by utilizing a non-zero eccentricity base arc in a treatment area of the lens to enable the eccentricity of an image screen on a retina to be non-zero so as to increase the peripheral defocusing area imaged on the retina and further effectively control myopia or hypermetropia.

Background

Along with research, development and innovation of various electronic and electrical products, people are convenient and fast in daily life and work, and especially, the popularization of application of electronic products in communication and internet is caused, so that many people are immersed in the use field of electronic products, the coverage range of the electronic products is quite wide for a long time, no matter office workers, student groups, middle-aged and old people and the like, the phenomenon of low head is derived, the conditions of eye vision loss, injury and the like of many people are serious day by day, and the shortsightedness population is relatively improved.

Furthermore, myopia is caused by the mismatching of the light bending ability of the eye and the length of the eye, which may be caused by the over-long axis of the eye or the over-steep curvature of the cornea, which causes the image point of the object to fall in front of the retina, resulting in the blurring of the image of the object, so that the light bending ability of the eye needs to be reduced in order to correct the myopia, and the light bending ability of the cornea accounts for about 80% of the whole eye, so that the myopia can be corrected by only reducing the refractive power of the cornea.

The present methods for correcting ametropia mainly include a method of correcting a spectacle wearer, a method of correcting a contact lens wearer, a corneal myopia surgery or a method of correcting a plastic lens wearer, each of which has advantages and disadvantages, and the methods are particularly studied for a plastic lens wearer, wherein the plastic lens wearer is made of a material having high oxygen permeability, after the lens wearer wears an eyeball, a layer of tear fluid having non-uniform distribution is sandwiched between the lens and an outer surface of the cornea of the eyeball, so that epithelial cells can be flattened by a normal pressure exerted on the cornea by the tear fluid, and meanwhile, when the wearer uses an eyelid to perform an eye closing action, the wearer applies a certain pressure to the cornea by the weight of the eyelid and the lens, and if the wearing time is sufficient, the central curvature of the cornea is gradually flattened and the central epithelial layer is gradually thinned, so that the central cornea is flattened, and further the refractive power of the cornea is reduced, thereby achieving the effects of correcting myopia and even recovering normal vision.

However, although the general corneal plastic lens can correct the myopic degree, some people cannot effectively control the myopic progression by wearing the corneal plastic lens, so that the myopic degree can continuously grow, and when the corneal plastic lens is in a low degree (between about 50 and 400 degrees), because the base arcs of the corneal plastic lens are all spherical, the space for accumulating tears formed by matching the spherical base arcs with the reversed arcs on one side is insufficient, so that epithelial cells cannot be effectively extruded, and the myopia control effect is poor.

Therefore, how to try to solve the above-mentioned drawbacks and inconveniences is a direction that those skilled in the art are eagerly to research and improve.

Disclosure of Invention

Therefore, the inventor of the present invention has found out the above-mentioned shortcomings, and has searched the relevant data, and has made many evaluations and considerations, and has made many years of experience accumulated in the industry, and has made trial and modification continuously, and has designed the aspheric lens and the manufacturing method thereof using the E value to control the growth rate of the eyeball.

The main objective of the present invention is to provide a lens having a treatment area including a base curve with non-zero eccentricity, which can increase the peripheral defocus area of the image formed on the retina by making the screen eccentricity of the image formed on the retina non-zero through the base curve, so as to effectively control myopia or hypermetropia, thereby achieving the purpose of correcting myopia or hypermetropia.

The secondary objective of the present invention is to make the lens surface by aspheric type, which has better peripheral defocus area at a low degree compared to the conventional spherical type corneal plastic plate, so as to achieve the purpose of better control effect of myopia or hyperopia.

Another object of the present invention is to provide a method for manufacturing a lens, which comprises detecting the shape of the cornea, adjusting the eccentricity of the base curve of a predetermined molding lens to make the base curve aspheric, and making the amount of tears between the predetermined molding lens and the cornea consistent with the amount of tears required for the peripheral defocus generated by the shape of the cornea.

The invention provides an aspheric lens for controlling the growth speed of an eyeball by utilizing an E value, which is a cornea molding sheet, has an aspheric surface, and comprises a treatment area for allowing light to pass through so as to form an image on the retina of the eyeball and a positioning area of a non-visual area outside the treatment area, wherein: the treatment zone is a base arc that includes a non-zero eccentricity and causes the screen eccentricity of the image imaged on the retina to be non-zero.

The invention further provides a method for manufacturing an aspheric lens by using the E value to control the growth rate of an eyeball, which comprises the following steps: (A) Firstly, a cornea detection machine is utilized to obtain the shape of the cornea of an eyeball of a wearer so as to obtain the tear volume required by the peripheral defocusing phenomenon generated by the shape of the cornea; (B) Simulating the cornea to be worn with a preset plastic lens through an electronic device, and calculating tear volume between the cornea and a base arc and a reverse arc of the preset plastic lens; (C) Then, the preset plastic lens is corrected, wherein the correction is to adjust the eccentricity of the base arc of the preset plastic lens to enable the eccentricity of the base arc to be non-zero, and further enable the base arc of the preset plastic lens to be in an aspheric surface shape, so that the tear amount between the preset plastic lens and the cornea is in accordance with the tear amount required by the peripheral defocusing phenomenon generated by the shape of the cornea by adjusting the eccentricity of the base arc; (D) The lens manufacturing machine is used to manufacture the lens according to the preset molding lens.

Drawings

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

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

FIG. 3 is a flow chart of the present invention.

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

Detailed Description

To achieve the above objects and advantages, the technical means and structure of the present invention are described in detail with reference to the preferred embodiments of the present invention, so as to fully understand the features and functions.

Referring to fig. 1 and fig. 2, which are a schematic light path diagram and a side sectional view of the present invention, it can be clearly seen that the lens 1 is a corneal plastic sheet, and the surface thereof is aspheric (aspheric), and includes a treatment region 11 for passing light to image at the retina 21 of the eyeball 2, and a positioning region 12 of a non-visual region outside the treatment region 11, wherein:

the treatment region 11 is a base curve 111 (BC) including a non-zero Eccentricity (E-value), and a reversed curve 112 (RC) is formed outside the base curve 111 to form a gap with the eyeball 2 for lacrimal fluid accumulation with the base curve 111.

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

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 in an elliptical shape.

Referring again to FIG. 3, which is a flow chart of the present invention, it can be clearly seen that when the lens 1 of the present invention is actually manufactured, the following steps can be included:

(A) The shape of the cornea 22 of the wearer's eyeball 2 can be obtained by a cornea detection machine (not shown) to obtain the amount of tear fluid required for the peripheral defocus generated by the shape of the cornea 22.

(B) An electronic device (not shown) is used to simulate a predetermined molding lens (not shown) being fitted on the cornea 22, and the tear amount between the cornea 22 and the base arc and the inversion arc of the predetermined molding lens is calculated.

(C) And then, the preset plastic lens is corrected, wherein the correction operation is to adjust the eccentricity (E value) of the base arc of the preset plastic lens so as to enable the eccentricity of the base arc to be non-zero, and further enable the base arc of the preset plastic lens to be in an aspheric surface shape, so that the tear volume between the preset plastic lens and the cornea 22 can be in accordance with the tear volume required by the peripheral defocusing phenomenon generated by the shape of the cornea 22 by adjusting the eccentricity of the base arc.

(D) The lens 1 of the present invention can be manufactured by a lens manufacturing machine (not shown) according to a predetermined molding lens.

The cornea detection machine of the step (A) may include a machine for detecting parameters such as refraction, shape, or curvature radius of the cornea 22 of the eyeball 2, such as Manifest recovery, schirmer, axial length, topography, auto-K, or Corneal diameter.

The amount of tears required for generating the peripheral defocus phenomenon in the step (a) can be obtained by a wearing experiment (i.e. by wearing test corneal shaping sheets for different shapes of the cornea 22 to obtain the amount of tears required for generating the peripheral defocus phenomenon, and establishing a database so that the database stores the data of the amount of tears required for generating the peripheral defocus phenomenon for various shapes of the cornea 22).

Furthermore, the electronic device in the step (B) may be an electronic device with an operation function, such as a desktop computer, a notebook computer or a tablet computer, and the electronic device may be internally installed with a predetermined corneal plastic sheet manufacturing software, so that a predetermined plastic lens is simulated to be worn on the cornea 22 through the software, and an amount of tear between the base arc and the inverted arc of the cornea 22 and the predetermined plastic lens is calculated by using an algorithm, and the algorithm may be:

wherein: 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 base arc inner surface of the preset plastic lens, and f2 (x) is the reverse arc inner surface of the preset plastic lens.

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

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 eccentricity of the image screen 20 imaged on the retina 21 can be between 0 and 1, i.e. the image screen 20 is non-circular arc (elliptical), and the non-circular arc image screen 20 can increase the peripheral out-of-focus area imaged on the peripheral out-of-focus image area 211 of the retina 21 compared with the preset spherical image screen a, so as to have better myopia control effect.

The present invention has the following advantages:

when the lens 1 is worn on the eyeball 2, the eccentricity of the image screen 20 imaged on the retina 21 is made non-zero due to the non-zero eccentricity of the base curve 111 of the treatment region 11, so as to increase the peripheral defocus area imaged on the retina 21, thereby effectively controlling the speed of the change (lengthening or shortening) of the axis of the eye, thereby effectively controlling the myopia or hyperopia, thereby achieving the effect of correcting the myopia or hyperopia.

Secondly, the surface of the lens 1 is made by aspheric type, compared with the conventional spherical type corneal plastic tablet, it can form more space for lacrimal fluid accumulation at a low degree (about 50-400 degrees) or at the base curve 111 and the reverse curve 112, and further has better peripheral defocus area, thereby having better control effect of myopia or hyperopia.

And thirdly, when the lens 1 is manufactured, the shape of the cornea 22 is detected, then the eccentricity of the base arc of the preset plastic lens is adjusted to enable the base arc to be in an aspheric surface shape, and further the tear volume between the preset plastic lens and the cornea 22 is in accordance with the tear volume required by the peripheral defocusing phenomenon generated by the shape of the cornea 22.

Therefore, the above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, the present invention is mainly directed to the fact that the treatment region 11 of the lens 1 includes the base curve 111 with non-zero eccentricity, i.e. the eccentricity of the image screen 20 imaged on the retina 21 is made non-zero by the base curve 111 to increase the peripheral defocus area imaged on the retina 21, thereby effectively controlling myopia or hyperopia, so as to achieve the effect of correcting myopia or hyperopia, therefore, all the structures and devices capable of achieving the above effects should be covered by the present invention, and such simple modifications and equivalent structural changes should be covered by the scope of the claims of the present invention.

In summary, the aspheric lens and the manufacturing method thereof using the E value to control the growth rate of the eyeball are actually developed for achieving the efficacy and purpose in practical application and implementation.

Claims

1. A method for manufacturing aspheric lens using E value to control the growth rate of eyeball, which is characterized in that the method comprises the following steps:

(A) Firstly, a cornea detection machine is utilized to obtain the shape of the cornea of an eyeball of a wearer so as to obtain the tear volume required by the peripheral defocusing phenomenon generated by the shape of the cornea;

(B) Simulating the cornea to be worn with a preset plastic lens through an electronic device, and calculating tear volume between the cornea and a base arc and a reverse arc of the preset plastic lens;

(C) Then, the preset plastic lens is corrected, wherein the correction operation is to adjust the eccentricity of the base arc of the preset plastic lens so as to enable the eccentricity of the base arc to be non-zero, and further enable the base arc of the preset plastic lens to be in an aspheric surface shape, so that the tear amount between the preset plastic lens and the cornea is in accordance with the tear amount required by the peripheral defocusing phenomenon generated by the shape of the cornea by adjusting the eccentricity of the base arc;

(D) The lens manufacturing machine is used for manufacturing the lens according to the preset plastic lens;

wherein the electronic device calculates tear volume between the cornea and the base arc and the reverse arc of the preset plastic lens by using an algorithm

The BCW is the base arc width of the preset plastic lens, the RCW is the reverse arc width of the preset plastic lens, f1 (x) is the base arc curved surface of the preset plastic lens, and f2 (x) is the reverse arc curved surface of the preset plastic lens.