CN114185184A - Cornea molding lens structure in parallel arc - Google Patents
Cornea molding lens structure in parallel arc Download PDFInfo
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- CN114185184A CN114185184A CN202010963219.7A CN202010963219A CN114185184A CN 114185184 A CN114185184 A CN 114185184A CN 202010963219 A CN202010963219 A CN 202010963219A CN 114185184 A CN114185184 A CN 114185184A
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- arc
- lens
- cornea
- base
- parallel
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- 210000004087 cornea Anatomy 0.000 title claims abstract description 63
- 238000000465 moulding Methods 0.000 title claims abstract description 5
- 210000005252 bulbus oculi Anatomy 0.000 claims abstract description 36
- 210000001508 eye Anatomy 0.000 claims description 12
- 210000001525 retina Anatomy 0.000 claims description 8
- 210000000744 eyelid Anatomy 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 11
- 238000012937 correction Methods 0.000 abstract description 4
- 230000004438 eyesight Effects 0.000 abstract description 4
- 208000001491 myopia Diseases 0.000 description 14
- 230000004379 myopia Effects 0.000 description 14
- 210000002919 epithelial cell Anatomy 0.000 description 7
- 206010020675 Hypermetropia Diseases 0.000 description 4
- 230000004305 hyperopia Effects 0.000 description 4
- 201000006318 hyperopia Diseases 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000005081 epithelial layer Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 208000029091 Refraction disease Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004430 ametropia Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000004397 blinking Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 210000000981 epithelium Anatomy 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 208000014733 refractive error Diseases 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000007958 sleep Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000004393 visual impairment Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/04—Contact lenses for the eyes
- G02C7/047—Contact lens fitting; Contact lenses for orthokeratology; Contact lenses for specially shaped corneae
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Eyeglasses (AREA)
Abstract
The invention relates to a structure of a cornea molding lens in a parallel arc, the center of the inner surface of the lens comprises a base arc, the outer side of the base arc is sequentially provided with an inverse arc, a parallel arc and a side arc outwards, the center of the base arc is provided with a center point with a linear distance between 9 mu m and 21 mu m with respect to the cornea of an eyeball, and the linear distance between the center point and the cornea is between 9 mu m and 21 mu m, so that the offset can be reduced when the lens is closed on the eyelid, and the vision correction effect can be improved.
Description
Technical Field
The invention relates to a structure of a cornea plastic lens in a parallel arc, in particular to a structure of a lens with a distance between a central point of a base arc and a cornea of 9-21 mu m so as to reduce the offset of the lens.
Background
Accordingly, with the development and innovation of various electronic and electrical products, people are convenient and fast in daily life and work, and especially, the popularization of the application of electronic products in communication and internet is further caused, so that many people are immersed in the application 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, and then the phenomenon of head lowering is derived, and therefore the situations 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 central part 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, when a general corneal plastic lens is actually worn, since the cornea is pressed and rubbed when closed, the corneal plastic lens is easy to shift, which results in that epithelial cells on the cornea cannot be flattened, and the correction effect is greatly reduced, and when the corneal plastic lens is in a low number (between about 50 to 400 degrees), because the base arcs of the corneal plastic lens are all spherical, a space for accumulating tears formed by matching the spherical base arcs with the inverted arcs on one side is insufficient, which results in that epithelial cells cannot be effectively pressed, 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, in view of the above-mentioned shortcomings, the inventor of the present invention has searched relevant information, evaluated and considered in many ways, and designed the structure of the corneal plastic lens in parallel arcs through continuous trial and modification based on years of experience accumulated in the industry.
The main object of the present invention is to provide a lens, wherein the center of the inner surface of the lens includes a base arc, and the outer side of the base arc is sequentially provided with an inverted arc, a parallel arc and a side arc, the center of the base arc forms a center point, a first intersection point is formed at the junction of the base arc and the inverted arc, a second intersection point is formed at the junction of the inverted arc and the parallel arc, a third intersection point is formed at the junction of the parallel arc and the side arc, and the linear distance between the center point and the cornea of the eyeball is between 9 μm and 21 μm, so that the offset can be reduced when the lens is closed by the eyelid, and the vision correction effect can be improved.
The secondary objective of the present invention is to make the base curve of the lens be aspheric, so that the eccentricity of the image screen imaged on the retina of the eyeball is non-zero, thereby increasing the peripheral defocus area imaged on the retina, and further effectively controlling the speed of the change of the eye axis, so as to effectively control the myopia or hyperopia, thereby achieving the purpose of correcting the myopia or hyperopia.
Another objective of the present invention is to provide a lens having a third intersection point between the parallel arc and the side arc, which is in contact with the corneal surface of the eyeball, and the contact portion of the third intersection point is the largest, so that the lens is not easy to shake when the eyelid is closed, thereby reducing the offset of the lens, and improving the accuracy of the extrusion process, so as to achieve the purpose of extruding the corneal surface.
It is still another object of the present invention that the linear distance between the first intersection point and the cornea is between 89 μm and 189 μm, so that the tear thickness between the first intersection point and the cornea can effectively flatten the epithelial cells of the cornea when the eyelids are closed, thereby achieving the goal of improving the myopia control effect.
In order to achieve the above object, the present invention provides a structure of a corneal remodelling lens in a parallel arc (Alignment Curve), the lens is worn on the corneal surface of a preset eyeball, the center of the inner surface of the lens includes a base Curve, the outer side of the base Curve is sequentially provided with an inverted Curve, a parallel Curve and a side Curve outwards, the center of the base Curve is provided with a central point, a first intersection point is formed at the intersection of the base Curve and the inverted Curve, a second intersection point is formed at the intersection of the inverted Curve and the parallel Curve, a third intersection point is formed at the intersection of the parallel Curve and the side Curve, and the linear distance between the central point of the base Curve and the cornea of the preset eyeball is 9 μm-21 μm.
In one embodiment, the base curve eccentricity of the lens is non-zero and the screen eccentricity of the image imaged on the retina of the intended eye is non-zero.
In one embodiment, the inverse arc of the lens is aspheric.
In one embodiment, a linear distance between a second intersection point of the inverted arc and the parallel arc of the lens and a cornea of the predetermined eyeball is between 15 μm and 25 μm.
In one embodiment, a third intersection point between the parallel arc and the side arc is in contact with the corneal surface of the predetermined eyeball.
In one embodiment, the linear distance between the first intersection point of the base arc and the inversion arc and the cornea of the predetermined eyeball is between 89 μm and 189 μm.
Drawings
FIG. 1 is a side sectional view of the present invention.
FIG. 2 is a schematic diagram of the optical path of the present invention.
FIG. 3 is a data graph showing the distance between the lens and the cornea according to the present invention.
List of reference numerals: 1-a lens; 11-base arc; 110-a center point; 111-first intersection; 12-a reverse arc; 121-a second intersection; 13-parallel arc; 131-a third intersection; 14-side arc; 2-eyeball; 21-the cornea; 22-retina.
Detailed Description
To achieve the above objects and advantages, and in accordance with the purpose of the invention, as embodied and broadly described herein, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, which are a side sectional view and a schematic optical path diagram of the present invention, it can be clearly seen that, the lens 1 is a cornea molding sheet which can be worn on the eyeball 2, is in a circular arc shape and is made of high oxygen permeable material, the inner surface of the lens 1 is attached to the surface of the cornea 21 of the eyeball 2, the center of the inner surface of the lens 1 comprises a base arc 11(BC) which has a preset radian and applies a positive pressure to the surface of the cornea 21 through tears (not shown in the figure) between the lens 1 and the cornea 21, the outer side of the base arc 11 is sequentially provided with an inverted arc 12(RC), a parallel arc 13(Alignment Curve) and an edge arc 14(PC) outwards, and the center of the base arc 11 is formed with a central point 110, a first intersection 111 is formed at the junction of the base arc 11 and the reversed arc 12, a second intersection 121 is formed at the junction of the reversed arc 12 and the parallel arc 13, and a third intersection 131 is formed at the junction of the parallel arc 13 and the side arc 14.
The base curve 11 and the inversion curve 12 of the lens 1 are aspheric (i.e., have non-zero eccentricity).
Moreover, the predetermined curvature of the base curve 11 of the lens 1 is greater than the horizontal curvature of the cornea 21 of the eyeball 2 (i.e. the curvature of the base curve 11 is flatter than the horizontal curvature of the cornea 21), and since the curvature of the base curve 11 is greater than the curvature of the cornea 21, when the lens 1 is worn on the eyeball 2, a positive pressure can be generated on the epithelial cells of the cornea 21 through tears between the base curve 11 and the cornea 21; in addition, the reversed arc 12 of the lens 1 is used for storing tears, so that the negative pressure provided by tears can achieve the effect of improving the positioning of the lens 1 on the eyeball 2.
The arc 14 of the lens 1 preferably has a slightly raised edge design, which can squeeze tear when blinking, so as to promote the tear circulation inside the lens 1, and thus the lens 1 and the cornea 21 of the eyeball 2 can be lubricated continuously and carry oxygen through the tear circulation, so as to improve the comfort and wearability during wearing.
When the present invention is used in practice, the user can wear the lens 1 on the eyeball 2 first, and make the inner surface of the lens 1 contact with the surface of the cornea 21 of the eyeball 2, at this time, tears with uneven thickness will be generated between the inner surface of the lens 1 and the cornea 21, when the user blinks or sleeps at night and closes the eyelid (not shown in the figure), the eyelid will press against the outer surface of the lens 1, at the same time, the weight of the eyelid and the lens 1 will generate a positive pressure, and a positive pressure is applied to the epithelial cells in the center of the surface of the cornea 21 of the eyeball 2 through the tears between the base curve 11 of the lens 1 and the cornea 21, and the epithelial cells in the surface of the cornea 21 will be pressed by the tears to make the central curvature thereof gradually become flat, thereby thinning the central epithelial layer of the cornea 21, and further reducing the refractive power of the cornea 21, so as to make the imaging point of the object move toward the retina 22 of the eyeball 2, thereby achieving the effect of reducing or eliminating the degree of myopia.
Referring to FIG. 3, which is a data graph of the distance between the lens of the present invention and the cornea 21 of the eyeball 2, it can be clearly seen from the graph that the straight-line distance between the center point 110 of the base arc 11 of the lens 1 of the present invention and the cornea 21 of the eyeball 2 is between 9 μm and 21 μm, and the straight-line distance between the first intersection point 111 of the base arc 11 and the inverse arc 12 and the cornea 21 of the eyeball 2 is between 89 μm and 189 μm, and since the straight-line distance between the center point 110 of the base arc 11 and the cornea 21 of the eyeball 2 is between 9 μm and 21 μm, it can be known from experimental data that the lens 1 can reduce the offset when the eyelid is closed, and further improve the vision correction effect, and since the straight-line distance between the first intersection point 111 and the cornea 21 of the eyeball 2 is between 89 μm and 189 μm, it can be known from experimental data that when the eyelid is closed, the tear thickness between the first intersection point 111 and the cornea 21 of the eyeball can effectively flatten the epithelium of the cornea 21, thereby achieving the effect of improving the myopia control.
The straight-line distance between the second intersection point 121 between the reverse arc 12 and the parallel arc 13 of the lens 1 and the cornea 21 of the eyeball 2 is between 15 μm and 25 μm, and the base arc 11 and the reverse arc 12 of the lens 1 are aspheric, so that the straight-line distance between the second intersection point 121 and the cornea 21 of the eyeball 2 is indeed between 15 μm and 25 μm by the aspheric design, thereby improving the accuracy in manufacturing, and the eccentricity of the image screen formed on the retina 22 of the eyeball 2 is nonzero due to the aspheric shape (non-zero eccentricity) of the base arc 11 of the lens 1, thereby increasing the peripheral defocus area formed on the retina 22, and further effectively controlling the speed of the change (lengthening or shortening) of the axis of the eye, thereby effectively controlling the myopia or hypermetropia, and further achieving the effect of correcting the myopia or hypermetropia.
However, since the third intersection 131 between the parallel arc 13 and the side arc 14 is in contact with the surface of the cornea 21 of the eyeball 2, and the lens 1 is in the shape of an arc, the circumference of the lens 1 is larger as it approaches the outer periphery, so that the contact part is the largest when the third intersection 131 is in contact with the surface of the cornea 21 of the eyeball 2, and further, when the eyelid of the lens 1 is closed, the lens is less likely to shake, thereby reducing the offset of the lens 1, improving the accuracy in pressing, and pressing the surface of the cornea 21 reliably.
It should be understood that the above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, so that the present invention is not limited by the above description and the accompanying drawings.
Claims (6)
1. A structure of a cornea molding lens on a parallel arc (Alignment cut) is characterized in that the lens is worn on the surface of the cornea of a preset eyeball, the center of the inner surface of the lens comprises a base arc, the outer side of the base arc is sequentially provided with an inverted arc, a parallel arc and a side arc outwards, the center of the base arc is provided with a central point, a first intersection point is formed at the junction of the base arc and the inverted arc, a second intersection point is formed at the junction of the inverted arc and the parallel arc, a third intersection point is formed at the junction of the parallel arc and the side arc, and the straight line distance between the central point of the base arc and the cornea of the preset eyeball is between 9 mu m and 21 mu m.
2. The structure of claim 1, wherein the base Curve eccentricity of the lens is non-zero and the screen eccentricity of the image formed on the retina of the intended eye is non-zero.
3. The orthokeratology lens of claim 1, wherein the inverted arc of the lens is aspheric.
4. The structure of the orthokeratology lens in parallel arcs (Alignment curre) of claim 1, wherein the linear distance between the second intersection point of the inverted arc and the parallel arc of the lens and the cornea of the predetermined eyeball is between 15 μm and 25 μm.
5. The orthokeratology lens of claim 1, wherein the third intersection point between the parallel arc and the side arc is in contact with the corneal surface of the intended eye.
6. The structure of the orthokeratology lens in parallel arcs (Alignment Current) as claimed in claim 1, wherein the linear distance between the first intersection point of the base arc and the inversion arc and the cornea of the predetermined eyeball is between 89 μm and 189 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010963219.7A CN114185184A (en) | 2020-09-14 | 2020-09-14 | Cornea molding lens structure in parallel arc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010963219.7A CN114185184A (en) | 2020-09-14 | 2020-09-14 | Cornea molding lens structure in parallel arc |
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| Publication Number | Publication Date |
|---|---|
| CN114185184A true CN114185184A (en) | 2022-03-15 |
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|---|---|---|---|
| CN202010963219.7A Pending CN114185184A (en) | 2020-09-14 | 2020-09-14 | Cornea molding lens structure in parallel arc |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003075782A (en) * | 2001-09-07 | 2003-03-12 | San Contact Lens:Kk | Hard contact lens |
| CN2914127Y (en) * | 2006-06-28 | 2007-06-20 | 陶悦群 | Contact lens for correcting eyesight |
| CN103389585A (en) * | 2012-05-08 | 2013-11-13 | 王龙 | Contact lens |
| CN206906717U (en) * | 2017-07-07 | 2018-01-19 | 王江桥 | A kind of Ortho-K for being used for myopia and merging presbyopia |
| CN107783314A (en) * | 2017-11-21 | 2018-03-09 | 欧普康视科技股份有限公司 | A kind of Ortho-K and customization piece segmental arc parameter generation method |
| TWM598958U (en) * | 2019-10-09 | 2020-07-21 | 亨泰光學股份有限公司 | Aspheric lens that uses E value to control the growth rate of eyeballs |
| CN211293489U (en) * | 2019-12-09 | 2020-08-18 | 珠海维视艾康特医药科技有限公司 | Multifocal corneal contact lens |
| CN213302704U (en) * | 2020-09-14 | 2021-05-28 | 亨泰光学股份有限公司 | Cornea molding lens structure in parallel arc |
-
2020
- 2020-09-14 CN CN202010963219.7A patent/CN114185184A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003075782A (en) * | 2001-09-07 | 2003-03-12 | San Contact Lens:Kk | Hard contact lens |
| CN2914127Y (en) * | 2006-06-28 | 2007-06-20 | 陶悦群 | Contact lens for correcting eyesight |
| CN103389585A (en) * | 2012-05-08 | 2013-11-13 | 王龙 | Contact lens |
| CN206906717U (en) * | 2017-07-07 | 2018-01-19 | 王江桥 | A kind of Ortho-K for being used for myopia and merging presbyopia |
| CN107783314A (en) * | 2017-11-21 | 2018-03-09 | 欧普康视科技股份有限公司 | A kind of Ortho-K and customization piece segmental arc parameter generation method |
| TWM598958U (en) * | 2019-10-09 | 2020-07-21 | 亨泰光學股份有限公司 | Aspheric lens that uses E value to control the growth rate of eyeballs |
| CN211293489U (en) * | 2019-12-09 | 2020-08-18 | 珠海维视艾康特医药科技有限公司 | Multifocal corneal contact lens |
| CN213302704U (en) * | 2020-09-14 | 2021-05-28 | 亨泰光学股份有限公司 | Cornea molding lens structure in parallel arc |
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