CN110515218A - A kind of Ortho-K - Google Patents
A kind of Ortho-K Download PDFInfo
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- CN110515218A CN110515218A CN201910852832.9A CN201910852832A CN110515218A CN 110515218 A CN110515218 A CN 110515218A CN 201910852832 A CN201910852832 A CN 201910852832A CN 110515218 A CN110515218 A CN 110515218A
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- cornea
- tear
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- 210000004087 cornea Anatomy 0.000 claims abstract description 51
- 230000001788 irregular Effects 0.000 claims abstract description 16
- 208000001491 myopia Diseases 0.000 claims description 8
- 238000013461 design Methods 0.000 abstract description 8
- 230000001225 therapeutic effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 9
- 230000004379 myopia Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000012937 correction Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011369 optimal treatment Methods 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 208000014733 refractive error Diseases 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000013316 zoning Methods 0.000 description 1
Classifications
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- 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
- G02C7/041—Contact lenses for the eyes bifocal; multifocal
- G02C7/044—Annular configuration, e.g. pupil tuned
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- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Prostheses (AREA)
Abstract
The present invention provides a kind of Ortho-K, including mirror body, the inner surface of the mirror body is formed with base curve area, reversion arc area, positioning arc area and circumference arc area from center continuously out, the reversion arc area and positioning arc area are divided into continuous irregular at least four region of radius of curvature in the circumferential direction of inner surface, the tear thickness formed between reversion arc area and the cornea corresponding region at least four region is identical, and the tear thickness formed between positioning arc area and the cornea corresponding region at least four region is identical.According to the practical cornea numerical Design of each wearer, the degree of agreement between Ortho-K and cornea is substantially increased, each wearer is made to be attained by optimal therapeutic effect.
Description
Technical field
The present invention relates to technical fields, and in particular to a kind of Ortho-K.
Background technique
Ortho-k is reducing myopia amount or is delaying teenager close as a kind of No operation invertibity correction of refractive errors method
Effect relatively certainly is obtained depending on development aspect, it is used using gas permeability hard Contact Lens (i.e. GRP material)
" reversion geometry " design principle, the inner surface configuration of Ortho-K is designed to anterior surface of cornea geometry on the contrary, In
Some gaps are manufactured between eyeglass and cornea, reach " orthopedic " effect using the mechanical function of tear.Ortho-K is hardness
Glasses are worn and clip one layer of tear unevenly distributed between rear lens inner surface and outer corneal surface, eyeglass and tear layer point
Cloth is uneven, resulting hydrodynamics effect can symmetrically, gradual change Central corneal mirror surface shape to reduce myopia,
It is being worn over cornea front during sleep, cornea curvature is gradually made to flatten, axis oculi shortens, so that myopia degree is significantly reduced,
Eyesight is improved, while also effectively having contained the fast development of adolescent myopia.
Modern times are generally divided into four regions using the Ortho-K of " reversion geometry " design: base curve area contacts eye cornea
Middle section, face shape is relatively flat, for flattening anterior corneal surface；It is more precipitous to invert arc area, for consolidating the pressing of base curve
Effect, and guarantee certain tear storage capacity；Positioning arc area can also be regarded as being mainly used for stabilized lenses with the area Shi Hu；All arcs
The circulation of area's guarantee cornea and Ortho-K periphery tear.
Ortho-K be the key that between two parties can accurate, safe plasticity cornea, and tieed up between Ortho-K and cornea
Holding uniform tear layer is the most important factor for guaranteeing that Ortho-K is placed in the middle.The reversion arc area of existing Ortho-K is fixed
The area Wei Hu is typically designed as one or two segmental arcs, and the coaxial identical or symmetry of each segmental arc incurvature radius is identical, however big
The cornea of majority is non complete symmetry, irregular, this to be difficult to accomplish between Ortho-K and cornea flat well
It is capable, identical, it is difficult to which that the smooth exchange for guaranteeing the placed in the middle and tear of Ortho-K seriously affects the effective of Ortho-K correction
Property and the safety used.
Summary of the invention
The present invention provides a kind of safe and effective Ortho-K, can be set according to the practical cornea numerical value of each wearer
Meter, substantially increases the degree of agreement between Ortho-K and cornea, and each wearer is made to be attained by optimal treatment effect
Fruit.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of Ortho-K, including mirror body, the inner surface of the mirror body are formed with base curve area, anti-from center continuously out
The area Zhuan Hu, positioning arc area and circumference arc area, the reversion arc area and positioning arc area are divided into radius of curvature in the circumferential direction of inner surface and connect
Continue irregular at least four region, is formed between reversion arc area and the cornea corresponding region at least four region
Tear thickness is identical, and the tear thickness formed between positioning arc area and the cornea corresponding region at least four region is identical.
Further, the base curve area is divided into radius of curvature continuous irregular at least four in the circumferential direction of inner surface
Region, the base curve area radius of curvature at least four region are kept with the radius of curvature in region corresponding to the practical cornea of wearer
Unanimously.
Further, the circumference arc area is divided into radius of curvature continuous irregular at least four in the circumferential direction of inner surface
A region, the tear exchange velocity of the tear floor formed between the circumference arc area and cornea corresponding region at least four region
It is identical.
From the above technical scheme, the present invention will be by that will invert in arc area, positioning arc area, base curve area and circumference arc area
At least one arc zoning is divided at least four regions, and the radius of curvature consecutive variations in each region, it is therefore intended that can be according to every
The practical cornea numerical Design of a wearer, substantially increases the degree of agreement between cornea plasticity piece and cornea, makes tear layer point
Cloth is uniform, reaches that lens orientation is placed in the middle, the change cornea geometric shape of accurate safety, and then changes corneal diopter.And when pendant
Wearer's cornea is irregular, non complete symmetry when, can solve to wear conventional spherical or aspherical coaxial or two curvature shaft radius phases
With Ortho-K occur can not precise positioning the problem of, so that the Ortho-K of each wearer be made to be attained by
Optimal therapeutic effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of Ortho-K described in embodiment 1；
Fig. 2 is the structural schematic diagram of Ortho-K as described in example 2；
Fig. 3 is the structural schematic diagram of Ortho-K described in embodiment 3.
Specific embodiment
A kind of preferred embodiment of the invention is described in detail with reference to the accompanying drawing.
The Ortho-K includes mirror body, and the inner surface of the mirror body is formed with base curve area 1, reversion from center continuously out
Arc area 2, positioning arc area 3 and circumference arc area 4, and four areas Ge Hu are spherical surface or aspheric design.
The form of cornea is varied, in addition to rule spherical surface form, ellipsoid form, also regular symmetrical bow tie,
Other irregular forms of irregular bow tie, etc..In order to adapt to the cornea of variform, mirror body can be refined as A,
B, tetra- regions C, D, and four region pairwise orthogonals, manufacture easy to process.
In the present embodiment, the circumferential direction of mirror body inner surface is divided into radius of curvature continuously irregular A, B, C, D tetra-
Region, the area A are [- 45 °~45 °], the area B [45 °~135 °], the area C [135 °~-135 °], the area D [- 135 °~-45 °], wherein AC
Area and the area BD are orthogonal.
The rise of mirror body each position calculates as follows:
ZA_BIndicate that the rise of eyeglass inside surface A area and the area B each position calculates；ZC_DIndicate the area eyeglass inner surface C and D
The rise of area's each position calculates；CA、CB、CC、CD、XA、YB、XC、YDIndicate 0 °, 90 °, 180 °, the starting curvature on -90 ° of directions and
Position radius, these data can be directed to corneal topography.
KA、KB、KC、KDFor form factor, form factor is also whose conic coefficient, and radius of curvature consecutive variations are mainly
Pass through KA、KB、KC、KDTo control, that is to say, that as long as designing reasonable KA、KB、KC、KD, the same arc area may be implemented, it is different
Region have different rises.
Embodiment 1:
The reversion arc area 2 and positioning arc area 3 the circumferential direction of inner surface be divided into radius of curvature continuously irregular A,
B, tetra- regions C, D, wherein the tear thickness formed between reversion arc area and the cornea corresponding region in four regions is identical, four
The tear thickness formed between positioning arc area and the cornea corresponding region in region is identical.
The reversion arc area 2 is to form negative pressure by the tear of receiving by inverting geometry designs, thus anti-to eyeglass
The area Zhuan Hu generates pulling force, forces the movement of cornea tissue.Because the radius of curvature in the corresponding reversion arc region of cornea is irregularly to connect
It is continuous to change, if only given eyeglass inverts the same radius of curvature in arc area, then the tear formed number it is just unbalanced, instead
The tear thickness formed between the area Zhuan Hu and cornea corresponding region is mutually different, and the pulling force being consequently formed is different, and it is close to will lead to correction
It is likely to occur that the movement of some regional organization is more, some regional organization is mobile less, this necessarily will affect depending on range of decrease difference reversion arc area
The formation of defocus ring, so as to affect the effect of myopia control.
The main function in the positioning arc area 3 is positioning, prevents eyeglass deviation, belongs to the supporting point of entire eyeglass.If fixed
The curvature in the area Wei Hu is constant, and eyeglass, which cannot take advantage of a situation, to carry out curvature and irregularly change, then the positioning arc area of eyeglass cannot be complete
It is docile with cornea, it is different to position the tear thickness formed between arc area and cornea corresponding region, so that eyeglass sliding degree is too big, or
Person's eyeglass deviation, to involve base curve area and invert the effect performance in arc area.
The test method of tear thickness is as follows:
△=Zcornea-Zlens(A,B,C,D)；
Wherein △ is the thickness of tear layer under mirror, ZcorneaFor rise data, Zlens(A,B,C,D)For each region each point of eyeglass
Rise.
In corneal topography, the height map of measurement cornea can be provided, the spherical surface of the same standard of cornea compares, and provides each
A region is higher or lower than the curve and its numerical value of spherical surface, can therefrom learn the rise data of cornea each point each position indirectly
Zcornea；Simultaneously by height map, we are also to be very easy to find, for many corneas, the often same arc area, and not same district
The different position in domain, the difference of rise are very big.
The value of the thickness △ of tear floor is different according to the effect in each area under mirror, and the value taken is different, ordinary circumstance base
Arc area △ ≈ [5 μm~25 μm] inverts the tear thickness △ ≈ [25 μm~100 μm] in arc area, positions the tear thickness △ ≈ of arc
[20 μm~30 μm], the tear thickness △ ≈ [100 μm~200 μm] in the area Zhou Hu.Although the value each taken requires difference,
We can be by monitoring the same arc area, and whether the △ numerical value of different location is same to understand the variation of radius of curvature of eyeglass
The radius of curvature variation of cornea matches.
Embodiment 2:
Continuously irregularly become the difference from embodiment 1 is that the base curve area 1 is divided into radius of curvature in the circumferential direction of inner surface
Tetra- regions A, B, C, D of change, base curve area radius of curvature and the region corresponding to the practical cornea of wearer in four regions
Radius of curvature is consistent.
For certain irregular corneas, there is multiple and different HK in base curve area, only gives a fixed RBCIt can make
There is difference at the TP corrected in base curve area, the radius of curvature of formation is inconsistent, will lead to myopia correction range of decrease difference, thus shadow
Ring visual quality.
The present invention is by base curve area radius of curvature RBCIt is designed to variable, meets following formula:
Wherein, HKVariationFor the variation of the flat K value of cornea, TP is the near-sighted range of decrease.
Embodiment 3:
The difference from embodiment 1 is that in the circumferential direction of inner surface to be divided into radius of curvature continuously irregular in the circumference arc area 4
Tetra- regions A, B, C, D of variation, the tear floor formed between the circumference arc area and cornea corresponding region in four regions
Tear exchange velocity is identical.
The circumference arc area 4 is mainly that effect is to promote the exchange of tear, and all arcs are like the sluice gate of water flow, if encountered
The area irregular cornea Zhou Hu, or using conventional design, then the length and width that necessarily will cause tear sluice gate are not
Together, some places tear flow stream velocity is fast, and some places tear flow stream velocity is slow, if at this time the radius of curvature in the area eyeglass Zhou Hu with
Cornea is irregularly changed, then can ensure that the speed of each local tear exchange under mirror is identical.
In order to realize that tear exchange velocity is identical, between the circumference arc area and cornea corresponding region at least four region
The tear sluice gate length of the tear layer of formation, tear sluice gate width degree are identical.
Embodiment described above is only that preferred embodiments of the present invention will be described, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made, should fall within the scope of protection determined by the claims of the present invention.
Claims (5)
1. a kind of Ortho-K, including mirror body, the inner surface of the mirror body is formed with base curve area, reversion from center continuously out
Arc area, positioning arc area and circumference arc area, which is characterized in that the reversion arc area and positioning arc area are divided into song in the circumferential direction of inner surface
Continuous irregular at least four region of rate radius, the reversion arc area and cornea corresponding region at least four region it
Between the tear thickness that is formed it is identical, the tear formed between positioning arc area and the cornea corresponding region at least four region is thick
It spends identical.
2. Ortho-K according to claim 1, which is characterized in that the base curve area is divided into song in the circumferential direction of inner surface
Continuous irregular at least four region of rate radius, the base curve area radius of curvature at least four region and wearer are real
The radius of curvature in region corresponding to the cornea of border is consistent.
3. Ortho-K according to claim 2, which is characterized in that base curve area radius of curvature RBC, meet as follows
Formula:
Wherein, HKVariationFor the variation of the flat K value of cornea, TP is the near-sighted range of decrease.
4. Ortho-K according to claim 1, which is characterized in that the circumference arc area is divided into the circumferential direction of inner surface
Continuous irregular at least four region of radius of curvature, the circumference arc area and cornea corresponding region at least four region
Between the tear exchange velocity of tear layer that is formed it is identical.
5. Ortho-K according to claim 4, which is characterized in that the circumference arc area and angle at least four region
The tear sluice gate length of the tear layer formed between film corresponding region, tear sluice gate width degree are identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910852832.9A CN110515218A (en) | 2019-09-10 | 2019-09-10 | A kind of Ortho-K |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910852832.9A CN110515218A (en) | 2019-09-10 | 2019-09-10 | A kind of Ortho-K |
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| CN110515218A true CN110515218A (en) | 2019-11-29 |
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| CN201910852832.9A Pending CN110515218A (en) | 2019-09-10 | 2019-09-10 | A kind of Ortho-K |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112450874A (en) * | 2020-11-20 | 2021-03-09 | 爱博图湃(北京)医疗科技有限公司 | Tear distribution detection method and device |
| CN112807151A (en) * | 2021-01-12 | 2021-05-18 | 首都医科大学附属北京同仁医院 | Method and system for determining AC value of orthokeratology mirror |
| CN114740635A (en) * | 2022-04-22 | 2022-07-12 | 温州医科大学附属眼视光医院 | Four-quadrant asymmetric orthokeratology mirror |
| CN114924427A (en) * | 2022-05-24 | 2022-08-19 | 快视(天津)科技有限公司 | Lens fitting method and device for orthokeratology lens, electronic equipment and storage medium |
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| CN203745737U (en) * | 2014-01-27 | 2014-07-30 | 爱博诺德（北京）医疗科技有限公司 | Orthokeratology (ortho-K) lens |
| CN107861261A (en) * | 2017-12-05 | 2018-03-30 | 罗辉 | Ortho-K tests method of completing the square and device |
| CN108681100A (en) * | 2018-05-17 | 2018-10-19 | 珠海艾格医疗科技开发有限公司 | A kind of design method of Ortho-K |
| CN109581690A (en) * | 2018-12-25 | 2019-04-05 | 天津医科大学眼科医院 | Eyeglass, glasses and acquisition defocusing amount parameter, the method with mirror and Evaluated effect |
| CN210401885U (en) * | 2019-09-10 | 2020-04-24 | 欧普康视科技股份有限公司 | Cornea shaping mirror |
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2019
- 2019-09-10 CN CN201910852832.9A patent/CN110515218A/en active Pending
Patent Citations (5)
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| CN203745737U (en) * | 2014-01-27 | 2014-07-30 | 爱博诺德（北京）医疗科技有限公司 | Orthokeratology (ortho-K) lens |
| CN107861261A (en) * | 2017-12-05 | 2018-03-30 | 罗辉 | Ortho-K tests method of completing the square and device |
| CN108681100A (en) * | 2018-05-17 | 2018-10-19 | 珠海艾格医疗科技开发有限公司 | A kind of design method of Ortho-K |
| CN109581690A (en) * | 2018-12-25 | 2019-04-05 | 天津医科大学眼科医院 | Eyeglass, glasses and acquisition defocusing amount parameter, the method with mirror and Evaluated effect |
| CN210401885U (en) * | 2019-09-10 | 2020-04-24 | 欧普康视科技股份有限公司 | Cornea shaping mirror |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112450874A (en) * | 2020-11-20 | 2021-03-09 | 爱博图湃(北京)医疗科技有限公司 | Tear distribution detection method and device |
| CN112450874B (en) * | 2020-11-20 | 2023-12-08 | 爱博诺德(北京)医疗科技股份有限公司 | Tear distribution detection method and device |
| CN112807151A (en) * | 2021-01-12 | 2021-05-18 | 首都医科大学附属北京同仁医院 | Method and system for determining AC value of orthokeratology mirror |
| CN112807151B (en) * | 2021-01-12 | 2022-09-13 | 首都医科大学附属北京同仁医院 | Method and system for determining AC value of orthokeratology mirror |
| CN114740635A (en) * | 2022-04-22 | 2022-07-12 | 温州医科大学附属眼视光医院 | Four-quadrant asymmetric orthokeratology mirror |
| CN114924427A (en) * | 2022-05-24 | 2022-08-19 | 快视(天津)科技有限公司 | Lens fitting method and device for orthokeratology lens, electronic equipment and storage medium |
| CN114924427B (en) * | 2022-05-24 | 2024-03-29 | 快视(天津)科技有限公司 | Lens matching method and device of cornea shaping lens, electronic equipment and storage medium |
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