CN211741753U

CN211741753U - Aspheric lens using E value to control eyeball growth speed

Info

Publication number: CN211741753U
Application number: CN201921884465.2U
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: 2020-10-23
Anticipated expiration: 2029-11-04

Abstract

The creation is related to an aspheric lens using E value to control the growing speed of eyeball, the treatment area of the lens is a base arc including non-zero eccentricity, the eccentricity of the image screen imaged on the retina can be made non-zero through the base arc to increase the peripheral defocusing area imaged on the retina, thereby effectively controlling myopia or hypermetropia and achieving the purpose of correcting myopia or hypermetropia.

Description

Aspheric lens using E value to control eyeball growth speed

Technical Field

The present invention relates to an aspheric lens using an E value to control the growing speed of an eyeball, and more particularly, to an aspheric lens using an E value to control the growing speed of an eyeball, in which the eccentricity of an image screen on a retina is non-zero in a treatment area of the lens by a base curve having a non-zero eccentricity, so as to increase the peripheral defocus area imaged on the retina, thereby effectively controlling 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 methods of correcting a spectacle wearer, a contact lens wearer, a corneal myopia surgery or a plastic lens wearer, and each of the above methods has advantages and disadvantages, and is especially studied on a plastic lens for cornea, wherein the plastic lens for cornea is made of a material with high oxygen permeability, after the lens is worn on an eyeball, a layer of tears with uneven distribution is sandwiched between the lens and the outer surface of the cornea of the eyeball, so that epithelial cells can be flattened by the normal pressure exerted on the cornea by the tears, and if a wearer performs an eye closing action by using the eyelids, a certain pressure can be exerted on the cornea by the weight of the eyelid and the lens, and if the wearing time is enough, the central curvature of the cornea can be gradually flattened and the central epithelial layer can be gradually thinned to flatten the center of the cornea, thereby reducing the refractive power of the cornea and achieving the effects of correcting myopia degree and even restoring normal vision.

However, although the general corneal plastic lens can correct the myopic degree, some people cannot wear the corneal plastic lens to effectively control the myopic deepening, 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.

SUMMERY OF THE UTILITY MODEL

Therefore, in view of the above-mentioned shortcomings, the inventor has collected the related data, and through many evaluations and considerations, and through many years of accumulated experiences in the industry, and through continuous trial and modification, has designed a new type of aspheric lens that uses 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 make the screen eccentricity of the image formed on the retina non-zero through the base curve to increase the peripheral defocus area formed on the retina, thereby effectively controlling myopia or hypermetropia, and thus achieving the purpose of correcting myopia or hypermetropia.

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

Another objective of the present invention is to provide a method for manufacturing a lens, wherein the shape of the cornea is detected, and the eccentricity of the base curve of the predetermined molding lens is adjusted to make the base curve non-spherical, so that the amount of tears between the predetermined molding lens and the cornea can be matched with the amount of tears required for the peripheral defocus generated by the shape of the cornea.

The creation provides an aspheric lens using E value to control the growth speed of eyeball, the lens is a cornea modeling sheet, the surface is aspheric, and includes a treatment area for light to pass through to form an image on the retina of eyeball, and a positioning area of the 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.

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 effects, the technical means and structure thereof adopted by the present invention are described in detail with reference to the preferred embodiments of the present invention, and the features and functions thereof are fully understood as follows.

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 elliptical.

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

(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 the cornea 22 with a preset molding lens (not shown), and the tear volume between the cornea 22 and the base arc and the reverse arc of the preset 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 radius of curvature of the cornea 22 of the eyeball 2, such as Manifest recovery, Schirmer, Axiallength, 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 fitting experiment (i.e. by fitting a test corneal model with different shapes to a tester of different shapes of the cornea 22, the amount of tears required for generating the peripheral defocus phenomenon can be obtained, and a database is established, so that the database stores the data of the amount of tears required for generating the peripheral defocus phenomenon for each shape 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.

Moreover, 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 compared with the preset spherical image screen a, 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, so as to have better myopia control effect.

The creation 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 arc 111 and the reverse arc 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 aforementioned effects should be covered by the present invention, and such simple modifications and equivalent structural changes should be covered by the protection scope of the claims of the present invention.

In summary, the present invention provides an aspheric lens using E value to control the growth rate of the eyeball in practical application and implementation, so as to achieve the efficacy and purpose thereof, and therefore the present invention is a research and development with excellent practicability, and is in accordance with the application requirements of the novel patent, and the application is laid out in law, and the examination and approval of the present application is expected to be carried out earlier, so as to ensure the painstaking research and development and creation of the creators, and the examination and approval of the jungle office has any doubt, and the creators are definitely matched with each other in great strength if they do not require their instructions.

Claims

1. An aspheric lens for controlling the growth rate of an eyeball by using an E value, wherein the lens is a corneal plastic molding sheet, the surface of the lens is aspheric, and the lens comprises a treatment area for 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.

2. The aspheric lens for controlling growth rate of eyeball according to claim 1, wherein the base curve outside the treatment area is an inverted curve formed with a fitting base curve to form a gap with eyeball for tear accumulation.

3. The aspheric lens for controlling eyeball growth rate according to claim 1, wherein the eccentricity of the base curve of the treatment area is between 0 and 1, and the base curve surface is elliptical.

4. An aspheric lens as defined in claim 1, characterised in that the positioning zone comprises a positioning arc for stabilizing the lens on the eyeball and an edge arc outside the positioning arc.