CN108646436A - A kind of cornea K values superelevation or ultralow Ortho-K and its design method - Google Patents
A kind of cornea K values superelevation or ultralow Ortho-K and its design method Download PDFInfo
- Publication number
- CN108646436A CN108646436A CN201810851581.8A CN201810851581A CN108646436A CN 108646436 A CN108646436 A CN 108646436A CN 201810851581 A CN201810851581 A CN 201810851581A CN 108646436 A CN108646436 A CN 108646436A
- Authority
- CN
- China
- Prior art keywords
- arcs
- ortho
- values
- cornea
- designed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 210000004087 cornea Anatomy 0.000 title claims abstract description 38
- 238000013461 design Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000012876 topography Methods 0.000 claims abstract description 20
- 238000010586 diagram Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- 201000003046 cornea plana Diseases 0.000 description 4
- 208000029091 Refraction disease Diseases 0.000 description 3
- 230000004430 ametropia Effects 0.000 description 3
- 208000014733 refractive error Diseases 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- GNBHRKFJIUUOQI-UHFFFAOYSA-N fluorescein Chemical compound O1C(=O)C2=CC=CC=C2C21C1=CC=C(O)C=C1OC1=CC(O)=CC=C21 GNBHRKFJIUUOQI-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 208000001491 myopia Diseases 0.000 description 1
- 230000004379 myopia Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- G02C7/024—Methods of designing ophthalmic lenses
-
- 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
Abstract
The present invention is suitable for Ortho-K field, a kind of cornea K values superelevation or ultralow Ortho-K and its design method are provided, the present invention is calculated by carrying out optometry with accurately corneal topography diagram data plus ophthalmology empirical data, solve orientation problem of the Ortho-K in these special corneal surface shapes, for the flat K values of cornea in 46.5D to 53D and in the cornea of 39.00D to 33.5D ranges, also suitable Ortho-K can be designed, to expand the use scope of Ortho-K significantly.
Description
Technical field
The invention belongs to Ortho-K field more particularly to a kind of cornea K values superelevation or ultralow Ortho-Ks
And its design method.
Background technology
Ortho-K originates from the U.S., is a kind of hard corneal contact lens of similar contact lenses, mainly passes through night
It is worn on the curvature that cornea is gradually changed on cornea, to achieve the purpose that correct defects of vision.Ortho-K is hard using gas permeability
Property Contact Lens, i.e., usually said RGP materials make spectacle lens, it is in air-locked hard material PMMA bases
Grow up on plinth.
Ortho-K design is generally using eyeglass is tried on, and with assessment technology is tried on, lens parameters determination cannot rely on one
Secondary evaluation is just completed, and is generally required repeatedly, assessment repeatedly, and the eyeglass assessment of different time after mirror is especially worn.It is moulded wearing
Shape eyeglass can carry out Evaluating Fluorescence Emission again after -2 hours 20 minutes.And how the moulding key factor matched of testing of cornea is by glimmering
Piece is tried in the assessment adjustment of light element on, eventually finds suitable eyeglass.Due to the use of assessment technology is tried on, it is limited to the observation of doctor's eyes
Identification of the precision to fluorescein collection of illustrative plates can only be designed for the Ortho-K of (39.5D to 46D) within the scope of certain cornea K values,
Correct light medium myopia, it is impossible to be used in correction higher and more low k cornea it is various ametropia.
Invention content
In view of the above problems, the purpose of the present invention is to provide a kind of cornea K values superelevation or ultralow Ortho-Ks
And its design method, it is intended to which higher of the cornea K values outside 39.5D to 46D and more can not be corrected by solving existing assessment technology of trying on
The various ametropia technical problems of low k cornea.
On the one hand, the cornea K values superelevation or the design method of ultralow Ortho-K include the following steps：
Step S1, BC arcs are designed：
Wherein the partially flat K values-in BC arcs curvature value=center are estimated reduces shading value, and light is regarded to realize that BC arcs quantitatively correct cornea
The radius of curvature in area；
Step S2, RC arcs are designed：
Wherein RC arcs curvature value ratio BC arc curvature values increase 2D to 10D；
Step S3, AC arcs are designed：
Wherein AC arcs data include the AC arc curvature value ACf in the flat direction and AC arc curvature value ACs in precipitous direction, this
In ACf take K the values Kf, ACs of 7 millimeters of area's minimums on corneal topography to take the maximum K values Ks in 7 millimeters of areas on corneal topography；
Step S4, PC arcs are designed：
Wherein PC arcs curvature value ratio AC arc curvature values reduce 2D to 10D.
On the other hand, the Ortho-K designs to obtain using above-mentioned design method, when the Ortho-K designs
For the flat K values of cornea in the cornea of 46.5D to 53D, the AC arcs curvature value of corresponding Ortho-K is in 46.5D to 53D models
It encloses, when the Ortho-K is designed for cornea of the flat K values of cornea in 39.00D to 33.5D, Ortho-K corresponds to
AC arcs curvature value in 33.5D to 39.00D ranges.
The beneficial effects of the invention are as follows：It is existing to try on for cornea K values superelevation or the special corneal surface shape of some ultralow
Assessment technology can not design suitable Ortho-K, and the present invention with accurately corneal topography diagram data by carrying out optometry
It calculates and adds ophthalmology empirical data, solve orientation problem of the Ortho-K in these special corneal surface shapes, for cornea
Flat K values can also design suitable Ortho-K in 46.5D to 53D and in the cornea of 39.00D to 33.5D ranges,
To expand the use scope of Ortho-K significantly.
Description of the drawings
Fig. 1 is the structure chart of Ortho-K provided by the invention；
Fig. 2 is a kind of corneal topography of the inclined flat cornea of exception；
Fig. 3 is the corneal topography of another abnormal inclined flat cornea；
Fig. 4 is the corneal topography of two high-k corneas.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, Ortho-K is base curve area (BC arcs) 1, reversion arc area (RC arcs) 2, positioning successively from the inside to the outside
Arc area (AC arcs) 3 and circumference arc area (PC arcs) 4, it is illustrated that label 5 is cornea.The embodiment of the present invention designs BC arcs first, then
RC arcs are designed, arc AC arcs and PC arcs are finally designed.The specific implementation process is as follows：
Step S1, BC arcs are designed：
Wherein the partially flat K values-in BC arcs curvature value=center are estimated reduces shading value, and light is regarded to realize that BC arcs quantitatively correct cornea
The radius of curvature in area, correction is various ametropia.
Step S2, RC arcs are designed：
Wherein RC arcs curvature value ratio BC arc curvature values increase 2D to 10D；
Step S3, AC arcs are designed：
Wherein AC arcs data include the AC arc curvature value ACf in the flat direction and AC arc curvature value ACs in precipitous direction, this
In ACf take K the values Kf, ACs of 7 millimeters of area's minimums on corneal topography to take the maximum K values Ks in 7 millimeters of areas on corneal topography.
There are 3 millimeters of areas, 5 millimeters of areas and 7 millimeters of areas on corneal topography.Fig. 2 shows a kind of angles of the inclined flat cornea of exception
Film topographic map, it is illustrated that be 7 millimeters of areas outside circle.This step can be related to two data when designing AC arc data：Flat direction
The AC arc curvature value ACf and AC arc curvature values ACs in precipitous direction.ACf takes the K value Kf of 7 millimeters of area's minimums on corneal topography,
That is the K values Kf of ACf=Kf, 7 millimeters of areas as shown in Figure 2 minimum are 38.81D, and ACs takes 7 millimeters of area's maximums on corneal topography
K value Ks, i.e. ACs=Ks, the maximum K values Ks in 7 millimeters of areas as shown in Figure 2 is 40.81D.
Fig. 3 shows the example of the corneal topography of the inclined flat cornea of another exception, and in figure, the K values Kf of 7 millimeters of area's minimums is
38.86D, the maximum K values Ks in 7 millimeters of areas are 41.14D.
For another example, Fig. 4 shows the corneal topography of two high-k corneas, wherein in the corneal topography in left side, 7 millimeters
The K values Kf of area's minimum is 46.45D, and the maximum K values Ks in 7 millimeters of areas is 47.91D, and in the corneal topography on right side, 7 millimeters of areas are most
Small K values Kf is 46.20D, and the maximum K values Ks in 7 millimeters of areas is 48.12D.
Therefore this step is according to corneal topography, you can designs AC arcs.
Step S4, PC arcs are designed：
Wherein PC arcs curvature value ratio AC arc curvature values reduce 2D to 10D.
The embodiment of the present invention uses corneal topography total corneal data, integrative medicine optometry, the Ortho-K designed
The cornea of applicable super high-k (46.5D to 53D ranges) and super low k (6.5D to 53D ranges).If Ortho-K designs
Cornea for the flat K values of cornea in (i.e. radius of curvature is 6.36 to 7.25mm) 46.5D to 53D, Ortho-K are corresponding
AC arc curvature value ranges are 46.5D to 53D (i.e. radius of curvature arrives 7.25mm 6.36), if Ortho-K is designed for cornea
Flat K values are in the cornea of 39.00D to 33.5D (i.e. radius of curvature arrives 10.07mm 8.65), the corresponding AC arcs of Ortho-K
Curvature value range is 33.5D to 39.00D (i.e. radius of curvature arrives 10.07mm 8.65).
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (2)
1. the design method of a kind of cornea K values superelevation or ultralow Ortho-K, the Ortho-K from the inside to the outside according to
Secondary is base curve area, that is, BC arcs, reversion arc area, that is, RC arcs, positioning arc area, that is, AC arcs and circumference arc area, that is, PC arcs, which is characterized in that institute
Design method is stated to include the following steps：
Step S1, BC arcs are designed：
Wherein the partially flat K values-in BC arcs curvature value=center are estimated reduces shading value, to realize that BC arcs quantitatively correct cornea regarding light area
Radius of curvature；
Step S2, RC arcs are designed：
Wherein RC arcs curvature value ratio BC arc curvature values increase 2D to 10D；
Step S3, AC arcs are designed：
Wherein AC arcs data include the AC arc curvature value ACf in the flat direction and AC arc curvature value ACs in precipitous direction, here
ACf takes K the values Kf, ACs of 7 millimeters of area's minimums on corneal topography to take the maximum K values Ks in 7 millimeters of areas on corneal topography；
Step S4, PC arcs are designed：
Wherein PC arcs curvature value ratio AC arc curvature values reduce 2D to 10D.
2. a kind of cornea K values superelevation or ultralow Ortho-K, which is characterized in that the Ortho-K uses such as right
It is required that 1 design method designs to obtain, when the Ortho-K is designed for the flat K values of cornea at the angle of 46.5D to 53D
When film, the AC arcs curvature value of corresponding Ortho-K is in 46.5D to 53D ranges, when the Ortho-K is designed for cornea
For flat K values in the cornea of 39.00D to 33.5D, the corresponding AC arcs curvature value of Ortho-K is in 33.5D to 39.00D ranges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810851581.8A CN108646436A (en) | 2018-07-30 | 2018-07-30 | A kind of cornea K values superelevation or ultralow Ortho-K and its design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810851581.8A CN108646436A (en) | 2018-07-30 | 2018-07-30 | A kind of cornea K values superelevation or ultralow Ortho-K and its design method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108646436A true CN108646436A (en) | 2018-10-12 |
Family
ID=63760615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810851581.8A Pending CN108646436A (en) | 2018-07-30 | 2018-07-30 | A kind of cornea K values superelevation or ultralow Ortho-K and its design method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108646436A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111000525A (en) * | 2019-11-21 | 2020-04-14 | 明灏科技（北京）有限公司 | Corneal plastic lens fitting method and system based on big data |
| 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 |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3482906A (en) * | 1965-10-04 | 1969-12-09 | David Volk | Aspheric corneal contact lens series |
| US5695509A (en) * | 1995-03-10 | 1997-12-09 | El Hage; Sami G. | Aspherical optical molds for continuous reshaping the cornea based on topographical analysis |
| US5741245A (en) * | 1992-01-15 | 1998-04-21 | Premier Laser Systems, Inc. | Corneal sculpting using laser energy |
| US6305802B1 (en) * | 1999-08-11 | 2001-10-23 | Johnson & Johnson Vision Products, Inc. | System and method of integrating corneal topographic data and ocular wavefront data with primary ametropia measurements to create a soft contact lens design |
| CN1672085A (en) * | 2002-08-07 | 2005-09-21 | 董晓青 | Orthokeratology and bi-focal contact lens |
| US7004584B1 (en) * | 2000-10-05 | 2006-02-28 | Crt Technology, Inc. | Contact lens and methods of manufacture |
| CN102122084A (en) * | 2005-02-15 | 2011-07-13 | 昆士兰科技大学 | Methods and optical devices for controlling myopia |
| CN102483526A (en) * | 2009-06-25 | 2012-05-30 | 庄臣及庄臣视力保护公司 | Design of myopia control ophthalmic lenses |
| US20120229767A1 (en) * | 2009-11-12 | 2012-09-13 | Noel Ami Alpins | Assessment of topographic semi-meridian parameters for corneal astigmatism analysis and vector planning treatment |
| CN102869298A (en) * | 2009-11-12 | 2013-01-09 | 诺埃尔·阿米·阿尔平斯 | Assessment of topographic semi-meridian parameters for corneal astigmatism analysis and vector planning treatment |
| CN104808353A (en) * | 2014-01-27 | 2015-07-29 | 爱博诺德（北京）医疗科技有限公司 | Orthokeratology lens |
| CN107632410A (en) * | 2016-07-19 | 2018-01-26 | 上海根植企业管理咨询有限公司 | A kind of Ortho-K tries the combined method of piece on |
| 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 |
| CN107861261A (en) * | 2017-12-05 | 2018-03-30 | 罗辉 | Ortho-K tests method of completing the square and device |
| CN108008544A (en) * | 2017-12-06 | 2018-05-08 | 爱博诺德（北京）医疗科技有限公司 | Method for manufacturing Ortho-K |
| CN208654464U (en) * | 2018-07-30 | 2019-03-26 | 王江桥 | A kind of cornea K value superelevation or ultralow Ortho-K |
-
2018
- 2018-07-30 CN CN201810851581.8A patent/CN108646436A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3482906A (en) * | 1965-10-04 | 1969-12-09 | David Volk | Aspheric corneal contact lens series |
| US5741245A (en) * | 1992-01-15 | 1998-04-21 | Premier Laser Systems, Inc. | Corneal sculpting using laser energy |
| US5695509A (en) * | 1995-03-10 | 1997-12-09 | El Hage; Sami G. | Aspherical optical molds for continuous reshaping the cornea based on topographical analysis |
| US6305802B1 (en) * | 1999-08-11 | 2001-10-23 | Johnson & Johnson Vision Products, Inc. | System and method of integrating corneal topographic data and ocular wavefront data with primary ametropia measurements to create a soft contact lens design |
| US7004584B1 (en) * | 2000-10-05 | 2006-02-28 | Crt Technology, Inc. | Contact lens and methods of manufacture |
| CN1672085A (en) * | 2002-08-07 | 2005-09-21 | 董晓青 | Orthokeratology and bi-focal contact lens |
| CN102122084A (en) * | 2005-02-15 | 2011-07-13 | 昆士兰科技大学 | Methods and optical devices for controlling myopia |
| CN102483526A (en) * | 2009-06-25 | 2012-05-30 | 庄臣及庄臣视力保护公司 | Design of myopia control ophthalmic lenses |
| US20120229767A1 (en) * | 2009-11-12 | 2012-09-13 | Noel Ami Alpins | Assessment of topographic semi-meridian parameters for corneal astigmatism analysis and vector planning treatment |
| CN102869298A (en) * | 2009-11-12 | 2013-01-09 | 诺埃尔·阿米·阿尔平斯 | Assessment of topographic semi-meridian parameters for corneal astigmatism analysis and vector planning treatment |
| CN104808353A (en) * | 2014-01-27 | 2015-07-29 | 爱博诺德（北京）医疗科技有限公司 | Orthokeratology lens |
| CN107632410A (en) * | 2016-07-19 | 2018-01-26 | 上海根植企业管理咨询有限公司 | A kind of Ortho-K tries the combined method of piece on |
| 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 |
| CN107861261A (en) * | 2017-12-05 | 2018-03-30 | 罗辉 | Ortho-K tests method of completing the square and device |
| CN108008544A (en) * | 2017-12-06 | 2018-05-08 | 爱博诺德（北京）医疗科技有限公司 | Method for manufacturing Ortho-K |
| CN208654464U (en) * | 2018-07-30 | 2019-03-26 | 王江桥 | A kind of cornea K value superelevation or ultralow Ortho-K |
Non-Patent Citations (2)
| Title |
|---|
| 梅颖;: "没有散光为什么要用散光角膜塑形镜", 中国眼镜科技杂志, no. 21, 1 November 2016 (2016-11-01), pages 120 - 122 * |
| 蓝育青等: "《现代激光角膜屈光手术》", 1 November 2015, 广东科技出版社, pages: 155 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111000525A (en) * | 2019-11-21 | 2020-04-14 | 明灏科技（北京）有限公司 | Corneal plastic lens fitting method and system based on big data |
| CN111000525B (en) * | 2019-11-21 | 2022-02-15 | 明灏科技（北京）有限公司 | Corneal plastic lens fitting method and system based on big data |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102947748B (en) | Cornea molding contact lenses | |
| CN107065218B (en) | Incude aperture eyeglass and method | |
| RU2559176C2 (en) | Construction of multi-axial lenses for astigmatism | |
| US9500880B2 (en) | Presbyopia lens with pupil size correction based on level of refractive error | |
| US11774780B2 (en) | Comfort-optimized contact lens system for non-rotationally symmetric eye aberration | |
| CN105445959A (en) | Freeform lens design and method for preventing and/or slowing myopia progression | |
| KR101495554B1 (en) | Method for designing multifocal contact lenses | |
| US20080212024A1 (en) | Customized contact lenses for reducing aberrations of the eye | |
| US6176580B1 (en) | Method of designing and fitting contact lenses taking into account material properties of the lenses | |
| CN108646436A (en) | A kind of cornea K values superelevation or ultralow Ortho-K and its design method | |
| CN208654464U (en) | A kind of cornea K value superelevation or ultralow Ortho-K | |
| Leonard et al. | Case report: Fitting a scleral lens on a central keratoconus patient using corneoscleral profilometry | |
| Woods et al. | Comparison of lens orientation stability of two daily disposable silicone hydrogel toric lenses |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |