TWM632377U - Optical center of orthokeratology lens and structure of multi-arc segment lens - Google Patents

Abstract

The present invention relates to the optical center of an orthokeratology sheet and the structure of a multi-arc segment lens. The lens is an orthokeratology sheet worn on the corneal surface of the pre-set eyeball, and the surface is aspherical, including the treatment area. The base arc and the reverse arc allow light to pass through to image the retina of the eyeball, as well as the positioning area of the non-visual area outside the treatment area, including the parallel arc and the side arc, and the lens is sequentially arranged from the outside of the base arc to the outside. If the arc is turned, parallel arc and side arc, the inner side of the base arc is in two-segment form, respectively, with different arcs of the inner arc of the optical center and the inner arc of the tear height, which can allow the eyeball to pass through the two-segment arc of the base arc to increase the imaging on the retina. It can effectively control myopia or hyperopia, so as to achieve the purpose of controlling visual acuity, correcting myopia or hyperopia, etc.

Description

Optical center of orthokeratology lens and structure of multi-arc lens

This creation provides an optical center of an orthokeratology lens and a structure of a multi-arc segment lens, especially the inner side of the base arc of the lens is formed in two segments with different arcs of the optical center inner arc and the tear height inner arc, so as to maintain the lens. The optimal tear storage volume between the eyeball and the eye can maintain the image viewing clarity of the existing vision, so as to increase the peripheral defocus area imaged on the retina, thereby effectively controlling myopia or hyperopia.

At present, the main methods of correcting refractive errors include wearing glasses, contact lenses, corneal myopia surgery, or orthokeratology lenses. The above methods have their own advantages and disadvantages. Orthokeratology lenses are studied, in which the orthokeratology lenses are made of high oxygen-permeable hard materials. When the lenses are worn on the eyeballs, the lenses will sandwich a layer of uneven distribution between the lenses and the outer surface of the cornea of the eyeballs. Even if the tear fluid is uniform, the epithelial cells can be flattened by the positive pressure exerted by the tear fluid on the cornea. At the same time, if the wearer uses the eyelid to close the eyes, the weight of the eyelid and the lens will exert pressure on the cornea. A certain pressure, if worn for enough time, can gradually flatten the central corneal curvature and thin the central epithelial layer, so as to flatten the central cornea, thereby reducing the refractive power of the cornea, thereby correcting myopia and even returning to normal. The effect of vision.

However, although general orthokeratology lenses can correct myopia, some people do not. Wearing orthokeratology lenses can effectively control the deepening of myopia, so that the degree of myopia will continue to grow. The base arcs are all spherical, so the space for the accumulation of tears formed by the spherical base arc and the reverse arc on one side will be insufficient, so that the epithelial cells cannot be effectively squeezed, resulting in poor control of myopia. How to solve the problem? At present, the problems and troubles of wearing orthokeratology lenses are the directions that the relevant manufacturers in this industry are eager to study and improve.

Therefore, in view of the above problems and deficiencies, the creator collected relevant information, evaluated and considered from various parties, and based on years of experience accumulated in this industry, through continuous creation and modification, before designing this kind of orthokeratology lens. A new patent for the structure of the optical center and the multi-arc lens was born.

，進而有效控制近視或遠視，藉此達到用以矯正近視或遠視之目的。 The main purpose of this creation is that the aspheric lens is an orthokeratology sheet to be worn on the corneal surface of the preset eyeball. At the retina of the eyeball, and the positioning area of the non-visual area outside the treatment area, including parallel arcs and side arcs, and the lens is sequentially provided with reverse arcs, parallel arcs and side arcs from the outside of the base arc to the outside, then the base arc There is an inner arc of the optical center at the center point of the optical center, and there are inner arcs with different radians of the tear height at the outer side of the inner arc of the optical center. It can maintain the image viewing clarity of the existing vision, and maintain a better tear storage volume between the lens and the eyeball. It can simulate wearing a lens on the cornea through an electronic device, and use an algorithm to calculate the cornea. The amount of tears between the base arc and the reverse arc of the lens, the formula is

, and then effectively control myopia or hyperopia, so as to achieve the purpose of correcting myopia or hyperopia.

Another purpose of this creation is that the eccentricity of the base arc of the lens can be between -4~4, and the eccentricity of the image screen imaged on the retina of the predetermined eyeball is non-zero, and the reverse arc of the lens is In order to be aspherical, the third intersection point between the parallel arc and the edge arc of the lens is in contact with the corneal surface of the predetermined eyeball.

Another purpose of this creation is that the lens can simulate wearing the lens on the cornea through an electronic device, and use an arithmetic formula to calculate the amount of tears between the base arc and the reverse arc of the cornea and the lens, and then pass through the lens. Adjust the eccentricity of the base arc of the plastic lens to make the base arc aspherical, so that the amount of tear fluid between the plastic lens and the cornea conforms to the amount of tears required for the peripheral defocus phenomenon caused by the shape of the cornea. It is easy to make the amount of tears between the lens and the cornea exactly meet the required amount of tears, so as to reduce the production error, so as to achieve the purpose of improving the product yield.

1: Lens

100: center point

101: First Intersection

102: Second Intersection

103: Third Node

11: Treatment area

111: base arc

112: reverse arc

113: Inner arc of light center

114: inner arc of tear height

12: Positioning area

121: Parallel arc

122: Edge Arc

2: Eyeball

20: Video Screen

21: Retina

211: Peripheral out-of-focus image area

22: Cornea

A0: Spherical image screen

[Picture 1] is a schematic diagram of the light path of this creation.

[Picture 2] is a side sectional view of this creation.

[Picture 3] is a schematic diagram of the base arc radius design for this creation.

[Picture 4] is a schematic diagram of the scale design of the base arc for this creation.

[Picture 5] is the flow chart of this creation.

In order to achieve the above purpose and effect, the technical means used in this creation, its structure, and implementation methods, etc., are described in detail with respect to the preferred embodiment of this creation, and its features and functions are as follows, so that I can fully understand.

Please refer to Figures 1, 2, 3, and 4, which are schematic diagrams of the light path of this creation , Side view section, schematic diagram of the radius design of the base arc, and schematic diagram of the proportional design of the base arc, it can be clearly seen from the diagrams that the optical center of the orthokeratology sheet and the structure of the multi-arc segment lens, the lens 1 It is an orthokeratology sheet, and the surface is 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 for the non-visual area outside the treatment area 11, wherein :

The treatment area 11 includes a base arc 111 (BC) whose eccentricity (Eccentricity; E value) can be between -4 and 4, and a base arc 111 is formed outside the base arc 111 to form a gap with the eyeball 2 . Reversal arc 112 (RC) for tear accumulation.

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

Moreover, the eccentricity of the base arc 111 of the treatment area 11 of the above-mentioned lens 1 can be between -4 and 4, and when the eccentricity is between 0 and 1, the surface of the base arc 111 is elliptical; System 111 may further comprise two different arc ratios of inner arc 113 (BC1) of the optical center and inner arc 114 (BC2) of the height of the tear fluid, wherein the inner arc of the optical center 113 (BC1) and the inner arc of the tear fluid 114 (BC2). The aspheric value [A _i ] is:

BC1 SAG-BC2 SAG=

And the eccentricity value (e) is:

The above (e) is the eccentricity value, and the (c) is the curvature value.

In the above-mentioned lens 1, the reverse arc 112, the parallel arc 121 and the side arc 122 of the positioning area 12 are sequentially formed from the outer side of the base arc 111 of the treatment area 11 to the outside, and the center point 100 is formed at the center of the base arc 111. , and a first intersection 101 is formed at the intersection of the base arc 111 and the reverse arc 112, a second intersection 102 is formed at the intersection of the reverse arc 112 and the parallel arc 121, and a third intersection is formed at the intersection of the parallel arc 121 and the side arc 122. 103, and the straight line distance between the first intersection 101 at the intersection of the base arc 111 and the reversal arc 112 and the cornea 22 of the preset eyeball 2 is between 89 μm and 189 μm, so as to effectively control myopia or hyperopia, thereby achieving optimal use To correct nearsightedness or farsightedness.

The preferred ratio [D ₁ : D 2 ] of the width occupied by the optical center inner arc 113 of the base arc 111 of the lens 1 and the tear height inner arc 114 [D 1 : D ₂ ] is 2:1, and the length of the tear height inner arc 114 is When it is 6 mm, the angle of the inner arc 113 of the optical center is 1.78°, and the angle of the inner arc 113 of the optical center + the inner arc 114 of the tear height is 2.34°.

In addition, the preferred ratio of the width [D ₁ : D ₂ ] occupied by the optical center inner arc 113 of the base arc 111 of the lens 1 and the tear height inner arc 114 can be 2:1, then when the tear height inner arc 114 When the length is 5.5mm, the angle of the inner arc 113 of the optical center is 1.657°, and the angle of the inner arc 113 of the optical center + the inner arc 114 of the tear height is 2.238°.

And the radius design method of the inner arc 113 of the optical center and the inner arc 114 of the tear height of the base arc 111 of the lens 1 (please refer to Figs. 3 and 4 at the same time), when the distance between the base arc 111 and the retina 21 of the eyeball 2 The axial length = 24.02mm, the radius of the base arc 111 can be 7.72mm, (e) is the eccentricity value [eccentricity] = 0.51°, where: the (θ) is the incident angle relative to the normal; the (η) is the angle of refraction relative to the normal; the (w) is the width of the inner arc 113 of the optical center, or the width of the inner arc 113 of the optical center + the inner arc 114 of the tear height; this (Ψ) is half the width of the viewing angle.

Then, the width of the optical center inner arc 113 and the tear height inner arc 114 of the base arc 111 of the lens 1 can be designed in two sections. The preferred ratio is the width occupied by the optical center inner arc 113 and the tear height inner arc 114. The preferable ratio [D ₁ : D ₂ ] can be 2:1, which can increase the capacity space for storing tears between the interior of the base arc 111 and the cornea 22 of the eyeball 2, and improve the wettability of the tear fluid to the cornea 22 of the eyeball 2, The inner arc 113 of the optical center and the inner arc 114 of the tear height of the base arc 111 can be tightly pressed against and attached to the cornea 22, and the retina 21 of the eyeball 2 can maintain the existing vision through the lens 1. It has the effect of slowing down the growth rate of the eyeball 2 and further controlling the vision (myopia or hyperopia, etc.).

As for the above-mentioned width ratio [D ₁ : D ₂ ] occupied by the inner arc 113 of the optical center and the inner arc 114 of the tear height of the base arc 11 of the lens 1, it can also be 2/3: 1/3 or 3/4: 1/ 4, etc., and the length from the center point 100 of the inner arc 113 of the optical center to the position of the intersection of the inner arc 114 of the tear height and the positioning area 12 (ie, the first intersection 101 ) can be 3.25mm~5.25mm.

Moreover, the eccentricity of the base arc 111 of the above-mentioned lens 1 can be between -4 and 4, and the eccentricity of the image screen imaged on the retina 21 of the predetermined eyeball 2 is non-zero, and the treatment area 11 of the lens 1 is not zero. The reversal arc 112 is aspherical, and the linear distance between the second intersection 102 between the reversal arc 112 and the parallel arc 121 of the positioning area 12 and the cornea 22 of the predetermined eyeball 2 can be between 15 μm and 25 μm. Meanwhile, the third intersection 103 between the parallel arcs 121 and the edge arcs 122 of the positioning area 12 of the lens 1 is in contact with the surface of the cornea 22 of the predetermined eyeball 2 .

And the linear distance between the second intersection 102 between the inversion arc 112 of the treatment area 11 of the lens 1 and the parallel arc 121 of the positioning area 12 and the cornea 22 of the eyeball 2 is between 15 μm and 25 μm. Between μm, since the base arc 111 and the reverse arc 112 of the lens 1 are aspherical, the straight-line distance between the second intersection 102 and the cornea 22 of the eyeball 2 can indeed be between 15 μm and 25 μm through the aspherical design. In between, the accuracy during manufacture can be improved, and since the base arc 111 of the lens 1 is aspherical (the eccentricity is non-zero), the eccentricity of the image screen imaged on the retina 21 of the eyeball 2 can be non-zero. 0, to increase the peripheral defocus area imaged on the retina 21, thereby effectively controlling the speed of the eye axis change (longer or shorter), thereby effectively controlling myopia or hyperopia, thereby achieving the effect of correcting myopia or hyperopia.

Furthermore, the third intersection point 103 between the parallel arc 121 and the edge arc 122 of the positioning area 12 of the lens 1 is contacting the surface of the cornea 22 of the eyeball 2. Because the lens 1 is in the shape of an arc, the more the lens 1 is, the more The circumference close to the periphery will be larger, so that when the third intersection point 103 contacts the surface of the cornea 22 of the eyeball 2, the contact part is the most, so that when the eyelid of the lens 1 is closed, it is not easy to shake. The offset of the lens 1 is reduced, so that the accuracy of squeezing can be improved, so that the surface of the cornea 22 can be squeezed.

In addition, the preset arc of the base arc 111 of the treatment area 11 of the above-mentioned lens 1 is greater than the horizontal arc of the cornea 22 of the eyeball 2 (that is, the arc of the base arc 111 is flatter than the horizontal arc of the cornea 22). The arc is greater than the arc of the cornea 22. When the lens 1 is worn on the eyeball 2, a positive pressure can be generated on the epithelial cells of the cornea 22 through the tear fluid between the base arc 11 and the cornea 22; in addition, the lens 1 The reverse arc 112 is used for storing tear fluid, and the effect of positioning the lens 1 on the eyeball 2 can be achieved by the negative pressure provided by the tear fluid.

In addition, the edge arc 122 of the positioning area 12 of the lens 1 is preferably designed with a slightly raised edge, which can squeeze the tear fluid when blinking, so as to promote the tear fluid circulation inside the lens 1, which can be achieved by the tear fluid circulation. Continuously lubricate the lens 1 and the cornea 22 of the eyeball 2 and bring in oxygen, To improve wearing comfort and wearability.

。 Then, the above-mentioned lens 1 is simulated on the cornea 22 through an electronic device, and the calculation formula is used to calculate the amount of tears between the cornea 22 and the base arc 111 and the reverse arc 112 of the lens 1. The calculation formula is:

.

When the present invention is actually used, the user can first wear the lens 1 on the eyeball 2, and make the inner surface of the lens 1 contact the surface of the cornea 22 of the eyeball 2. At this time, the inner surface of the lens 1 and the cornea 22 Tears with uneven thickness will be produced between the two, when the user blinks or goes to bed at night to close the eyelid (not shown in the figure), the eyelid will press against the outer surface of the lens 1, and at the same time, the eyelid and the lens will be closed. The weight of 1 will generate a positive pressure, and through the tear fluid between the base arc 111 of the treatment area 11 of the lens 1 and the cornea 22, a positive pressure will be exerted on the epithelial cells in the center of the surface of the cornea 22 of the eyeball 2, and The epithelial cells on the surface of the cornea 22 are squeezed by the tear fluid, so that the central arc of the cornea 22 will gradually become flatter, thereby thinning the central epithelial layer of the cornea 22, thereby reducing the refractive power of the cornea 22, so that the visual imaging point is directed toward the eyeball 2. The direction of the retina 21 is moved, so as to achieve the effect of reducing the degree of myopia or eliminating the degree of myopia.

Please refer to Figures 1, 2, 3, 4, and 5. From the figures, it can be clearly seen that the optical center of the orthokeratology lens and the structure of the multi-arc lens in this creation are the lens 1 of this creation. In actual manufacture, it may include the following steps:

(A) A corneal inspection machine (not shown in the figure) can be used to obtain the shape of the cornea 22 of the eyeball 2 of the wearer first, so as to know the amount of tears required for the shape of the cornea 22 to produce the peripheral defocus phenomenon.

(B) and through an electronic device (not shown in the figure) to simulate wearing a preset plastic lens (not shown in the figure) on the cornea 22, and calculate the relationship between the cornea 22 and the preset plastic lens Tear volume between the base arc and the reversal arc.

(C) The preset shaping lens is then calibrated. The calibration operation is to adjust the eccentricity (E value) of the base arc of the preset shaping lens, so that the eccentricity of the base arc is non-zero, so that the preset shaping lens can be adjusted. The base arc of the orthopedic lens is aspherical, whereby the eccentricity of the base arc can be adjusted to make the amount of tear fluid between the preset orthopedic lens and the cornea 22 conform to the amount of tear required for the peripheral defocus phenomenon caused by the shape of the cornea 22 .

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

The cornea testing 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 related to testing the diopter, shape or radius of curvature of the cornea 22 of the eyeball 2 .

And in the above-mentioned step (A), the amount of tears required to generate the peripheral defocus phenomenon can be obtained through the wearing experiment (that is, through the testers with different corneal shapes 22 to wear the orthokeratology sheet for testing, so as to obtain the The amount of tears required by the peripheral defocus phenomenon is obtained, and a database is established, so that the database contains the data of the amount of tears required by various shapes of the cornea 22 to produce the peripheral defocus phenomenon).

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 a preset orthokeratology sheet manufacturing software. Through this software, the cornea 22 is simulated wearing a preset plastic lens, and the calculation formula is used to calculate the difference between the cornea 22 and the base arc and the reverse arc of the preset plastic lens. tear volume, and the formula can be:

As for the above calculation formula, where: 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 inverted arc inner surface of the preset shaping lens.

When the user wants to correct myopia or hyperopia (ie, 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 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 region 11 is used, the eccentricity of the base arc 111 can be between -4 and 4, so the image shell 20 imaged on the retina 21 is non-circular, which is not a circular arc. Compared with the arc-shaped image screen 20, the arc-shaped image screen 20 can increase the peripheral defocus area imaged on the retina 21, and due to the increased peripheral de-focus area, compared with the general lens with a spherical base arc 111 1. Its myopia or hyperopia control effect is better.

In addition, when the user wants to correct myopia, the preferred 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, an image on the retina 21 can be formed. The eccentricity of the screen 20 is between 0 and 1, that is, it has a non-arc shape (ellipse shape). Compared with the predetermined spherical image screen 20, the non-arc-shaped 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 can have better myopia control effect.

The above is only the preferred embodiment of this creation, and therefore it limits the scope of the patent of this creation. Therefore, any simple modifications and equivalent structural changes made by using the contents of the description and drawings of this creation should be included in the same description. Within the scope of the patent of this creation, I agree to Chen Ming.

To sum up, the optical center and multi-arc segment lens of the above-mentioned orthokeratology sheet are created in this paper. When the structure is actually implemented and used, in order to achieve its effect and purpose, this creation is a creation with excellent practicality. In order to meet the application requirements for a new type patent, it is necessary to file an application according to law. I hope that the review committee will approve this case as soon as possible. In order to protect the hard work of the creators, if there are any doubts from the Judiciary Committee, please do not hesitate to send a letter for instructions, and the creators will do their best to cooperate.

1: Lens

11: Treatment area

111: base arc

112: reverse arc

113: Inner arc of light center

114: inner arc of tear height

12: Positioning area

121: Parallel arc

122: Edge Arc

2: Eyeball

20: Video Screen

21: Retina

211: Peripheral out-of-focus image area

22: Cornea

A0: Spherical image screen

Claims (8)

An optical center of an orthokeratology sheet and the structure of a multi-arc segment lens, the lens is worn on the corneal surface of a preset eyeball, is an orthokeratology sheet, and the surface is aspherical, and includes a lens for light to pass through. The treatment area imaged at the retina of the eyeball includes the base arc, the reverse arc, and the positioning area of the non-visual area outside the treatment area, including the parallel arc and the side arc, and the treatment area is inside the base arc. The inner arc of the optical center and the inner arc of the tear fluid height are composed of two different radian proportions, and a reverse arc, an alignment curve and a side arc are arranged on the outer side of the inner arc of the tear fluid height and face outward in sequence. The optical center of the orthokeratology sheet and the structure of the multi-arc segment lens according to claim 1, wherein the base arc eccentricity of the lens is between -4 and 4, and the image screen imaged on the retina of the predetermined eyeball is eccentric rate is non-zero. The optical center of the orthokeratology sheet and the structure of the multi-arc segment lens according to claim 1, wherein the aspherical values [Ai] of the optical center inner arc (BC1) and the tear height inner arc (BC2) of the lens are : BC1 SAG-BC2 SAG=

The optical center of the orthokeratology sheet and the structure of the multi-arc segment lens according to claim 1, wherein the eccentricity values (e) of the optical center inner arc (BC1) and the tear height inner arc (BC2) of the lens are:

. The optical center of the orthokeratology sheet and the structure of the multi-arc segment lens according to claim 1, wherein the inner arc of the optical center (BC1) and the inner arc of the tear fluid height (BC) of the base arc of the lens 2) The proportion of the width is 2:1, and when the length of the inner arc of the tear height is 6mm, the angle of the inner arc of the optical center is 1.78°, and the inner arc of the optical center + the inner arc of the tear height is 1.78°. The angle of the arc is 2.34°. The optical center of the orthokeratology sheet and the structure of the multi-arc segment lens according to claim 1, wherein the width occupied by the optical center inner arc (BC1) and the tear height inner arc (BC2) of the base arc of the lens The ratio is 2:1, and when the length of the inner arc of the tear height is 5.5mm, the angle of the inner arc of the optical center is 1.657°, and the angle of the inner arc of the optical center + the inner arc of the tear height is 2.238°. The optical center of the orthokeratology sheet and the structure of the multi-arc segment lens according to claim 1, wherein the width occupied by the optical center inner arc (BC1) and the tear height inner arc (BC2) of the base arc of the lens The ratio is 2/3:1/3 or 3/4:1/4, and the length from the center point of the inner arc of the optical center to the intersection of the inner arc of the tear height and the positioning area on one side is 3.25mm ~5.25mm. The optical center of the orthokeratology sheet and the structure of the multi-arc segment lens according to claim 1, wherein a center point is formed at the center of the base arc of the lens, and an electronic device is used to simulate wearing a lens on the cornea, And use the calculation formula to calculate the amount of tears between the base arc and the reverse arc of the cornea and the lens. The calculation formula is the amount of tears =

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

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