CN107783314A - A kind of Ortho-K and customization piece segmental arc parameter generation method - Google Patents
A kind of Ortho-K and customization piece segmental arc parameter generation method Download PDFInfo
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- CN107783314A CN107783314A CN201711169933.3A CN201711169933A CN107783314A CN 107783314 A CN107783314 A CN 107783314A CN 201711169933 A CN201711169933 A CN 201711169933A CN 107783314 A CN107783314 A CN 107783314A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 208000001491 myopia Diseases 0.000 claims abstract description 43
- 238000000465 moulding Methods 0.000 claims abstract description 40
- 241000700608 Sagitta Species 0.000 claims description 11
- 210000004087 cornea Anatomy 0.000 claims description 11
- 241000208340 Araliaceae Species 0.000 claims description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 2
- 235000008434 ginseng Nutrition 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000004379 myopia Effects 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 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
- 230000009467 reduction Effects 0.000 description 1
- 235000009566 rice Nutrition 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
- G02C7/047—Contact lens fitting; Contact lenses for orthokeratology; Contact lenses for specially shaped corneae
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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 and customization piece segmental arc parameter generation method, the moulding area of its Ortho-K includes the base curve area, compensation arc area and reversion arc area outwards set gradually from center, after the adjustment of the near-sighted range of decrease, base curve and reversion arc adjust therewith, by adjusting compensation arc to ensure that moulding sector width and rise are constant, so as to reach the suitability for not changing eyeglass in the situation for changing the near-sighted range of decrease.Ortho-K of the present invention, which tests timing, need to only consider the fit of eyeglass inner surface configuration and outer corneal surface, without considering the near-sighted range of decrease, enormously simplify and test with process, while reduce the quantity for trying piece on, reduce operating cost.
Description
Technical field
The present invention relates to the Ortho-K technical field for correction ocular eyesight, and in particular to a kind of Ortho-K
And customization piece segmental arc parameter generation method.
Background technology
Ortho-K is a kind of special hardness for reaching temporary reduction myopia degree by changing cornea geometric shape
Contact lens, it is that geometric shape and the near-sighted range of decrease for needing to reach carry out personalized designs before a kind of corneal correction according to user
Contact lense.The cornea of same geometric shape, the near-sighted range of decrease is different, and the geometric parameter of eyeglass will be different.Therefore, it is clinical at present
The piece group of trying on used in is typically all a two-dimensional matrix, and a variable is the flat K values of Central corneal, generally from
40.00 to 45.50, at intervals of 0.5D, normal central cornea K values can be covered substantially.Another variable is then the near-sighted range of decrease,
Generally from -1.00D to -6.00D, 0.5D is an interval.This most basic eyeglass number for trying piece group on is 132, if
Adaptation eyeglass more accurately to be found it is necessary to reduce interval, trying piece number on can be more.Dispenser test match somebody with somebody during from trying on
Select and exchange eyeglass in piece group, until find be adapted to substantially try piece parameter on, the design reference as last ordering lenses.
Whole to try that process is complex, time-consuming on, the more piece group of trying on of eyeglass number is also a larger investment, and generally every 3 years just
Scrap, change.
The content of the invention
The present invention provides a kind of new lens design methods, after the adjustment of the near-sighted range of decrease, base curve and reversion arc adjust therewith,
By adjusting compensation arc to ensure that moulding sector width and rise are constant, do not change mirror in the situation for changing the near-sighted range of decrease so as to reach
The suitability of piece, the piece group of trying on of two-dimensional matrix is changed into one-dimensional ordered series of numbers, the piece group can of trying on of one 12 substitutes now
132 try piece group on, test with greatly simplifying, try piece investment on and be also greatly decreased.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
A kind of Ortho-K, including mirror body, the inner surface of the mirror body are outwards disposed with moulding area, positioning from center
Arc area and circumference arc area, the moulding area include the base curve area, compensation arc area and reversion arc area outwards set gradually from center, should
Compensation arc area can keep moulding area's rise constant when adjusting the near-sighted range of decrease.
Further, the radius of curvature in the compensation arc area：
, wherein WCCArc for compensation arc area is wide, sagCCFor the rise in compensation arc area, WBCArc for base curve area is wide.
The present invention also provides a kind of customization piece segmental arc parameter generation method of Ortho-K, and the Ortho-K includes
Mirror body, the inner surface of the mirror body, which is outwards disposed with moulding area, positioning arc area and circumference arc area, the moulding area from center, to be included
Base curve area, compensation arc area and the reversion arc area outwards set gradually from center, the customization piece segmental arc parameter generation method include
Following steps：
1) user finds out the piece of trying on being adapted in geometric shape by trying on, and matching cornea is determined in piece from trying on
Moulding area's rise sagOT；
2) the near-sighted range of decrease that piece is actually needed with user is tried in contrast on, if trying the near-sighted range of decrease D of piece onTWith user is actual needs
The near-sighted range of decrease D wantedCIt is identical, then it will customize the parameter of each section of arc in the moulding area of piece and try the parameter setting of each section of arc in the moulding area of piece on
It is identical, try the near-sighted range of decrease D of piece onTThe near-sighted range of decrease D being actually needed with userCDiffer, then perform step 3)；
3) radius of curvature R in adjustment compensation arc areaCC：
According to the near-sighted range of decrease D of customization pieceCWith central planar K0Value, first determine the base curve radius of curvature R of customization pieceBCAnd base
The high sag of the sagitta of arcBC, then obtain customize piece the high sag of the reversion sagitta of arcRC, it is last according to the moulding area's rise sag for trying piece onOTCalculate
Go out to compensate the radius of curvature R in arc areaCC；
4) determine customization piece each arc in moulding area radius of curvature parameter, then from try in piece determine positioning arc most match
Parameter, generation customization all segmental arcs of piece parameter.
Further, in step 3), the radius of curvature R in adjustment compensation arc areaCCSpecific method be：
Calculate the base curve radius of curvature of customization pieceWherein n be cornea infractive index, KBCFor the K of base curve
Value, then obtains base curve riseWherein WBCArc for base curve area is wide；
The reversion sagitta of arc for calculating customization piece is highWherein RRCTo invert arc
Radius of curvature, WRCArc for reversion arc area is wide, WCCArc for compensation arc area is wide；
It is high by the compensation sagitta of arcObtain
Compensate arc radius of curvature：
Preferably, the K values K of base curveBC=K0-Dc- M, wherein K0For the flat K values of user's Central corneal, M was to rectify amount.
Preferably, it is describedWherein KRCTo invert the K values of arc, KRC=KBC+2×Dc, wherein DCTo customize piece
The near-sighted range of decrease.
Preferably, the near-sighted range of decrease D of piece is tried onTThe near-sighted range of decrease D being actually needed with userCIt is equal.
From above technical scheme, the moulding area of Ortho-K of the present invention adds one between base curve and reversion arc
Arc is compensated, base curve and reversion arc are needed when the near-sighted range of decrease change when changing therewith, is passed through and is adjusted compensation arc and maintain moulding area's arrow
It is high constant, so as to keep the suitability of eyeglass and cornea, due to can be tried on the piece of trying on of any near-sighted range of decrease with regard to energy
The ordering lenses of adaptation are designed exactly, are tried piece group on and are reduced to from two-dimensional matrix one-dimensional, test with greatly simplifying, try piece throwing on
Money is also greatly decreased.
Brief description of the drawings
Fig. 1 is the structural representation of Ortho-K of the present invention, and shows the position of cornea；
Fig. 2 is flow chart of the method for the present invention；
Fig. 3 is the adjustment schematic diagram of the inventive method.
Embodiment
A kind of preferred embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
As shown in figure 1, the Ortho-K includes attaching the mirror body on the surface of cornea 6, the inner surface of the mirror body from
Center is outwards disposed with moulding area A, positioning arc area 4 and circumference arc area 5, and the moulding area includes outwards setting successively from center
Base curve area 1, compensation arc area 2 and the reversion arc area 3 put, the compensation arc area can keep moulding area to swear when adjusting the near-sighted range of decrease
It is high constant, that is, when the near-sighted range of decrease changes initiation eyeglass base curve and reversion arc change, adjustment compensates arc to maintain moulding area
Rise is constant.
The present invention simplifies the principle tested and matched somebody with somebody, that is, controls the rise in moulding area constant, each by the moulding area of program adjust automatically
The combination of segmental arc radius of curvature, both meet user's myopia range of decrease demand, and maintain moulding area's rise constant again.Whole design must meet
Try the moulding area's rise sag of piece onOTWith customizing the moulding area's rise sag of pieceOCIt is equal, referring to Fig. 3, wherein meeting：WTRC=WRC, i.e., it is fixed
The arc that the arc in the moulding area of film-making is wide to be equal to try on piece is wide.If user have found the examination being adapted in geometric shape by trying on
Piece is worn, but tries the near-sighted range of decrease D of piece design onTThe near-sighted range of decrease D being actually needed with userCMight not be suitable, this just needs pair
Compensation arc is adjusted, and is described in detail with reference to Fig. 2 and 3 pair of customization piece segmental arc parameter production method：
Step 1: user finds out the piece of trying on being adapted in geometric shape by trying on, and matching is determined in piece from trying on
Moulding area's rise sag of corneaOT；
Step 2: the near-sighted range of decrease that piece is actually needed with user is tried in contrast on, if trying the near-sighted range of decrease D of piece onTWith user
The near-sighted range of decrease D being actually neededCIt is equal, then it will customize the parameter of each section of arc in the moulding area of piece and try the ginseng of each section of arc in the moulding area of piece on
Number setting is identical, tries the near-sighted range of decrease D of piece onTThe near-sighted range of decrease D being actually needed with userCDiffer, then perform step 3；
Step 3: the radius of curvature R in adjustment compensation arc areaCC：
According to the near-sighted range of decrease D of customization pieceCWith central planar K0Value, first determine the base curve radius of curvature R of customization pieceBCAnd base
The high sag of the sagitta of arcBC, then obtain customize piece the high sag of the reversion sagitta of arcRC, it is last according to the moulding area's rise sag for trying piece onOTCalculate
Go out to compensate the radius of curvature R in arc areaCC；
Step 4: determine customization piece each arc in moulding area radius of curvature parameter, then from try in piece determine positioning arc
The parameter most matched, the parameter of generation customization all segmental arcs of piece.
Wherein in step 3, the radius of curvature R in adjustment compensation arc areaCCSpecific method be：
Calculate the base curve radius of curvature of customization pieceRadius of curvature unit is rice, and wherein n is the dioptric of cornea
Index, KBCFor the K values of base curve, base curve rise is then obtainedWherein WBCFor the arc in base curve area
It is wide；The K values K of base curveBC=K0-Dc- M, wherein K0For the flat K values of user's Central corneal, M was to rectify amount；
The reversion sagitta of arc for calculating customization piece is highWherein RRCTo invert arc
Radius of curvature, WRCArc for reversion arc area is wide, WCCArc for compensation arc area is wide；It is describedWherein KRCTo invert arc
K values, KRC=KBC+2×Dc, wherein DCTo customize the near-sighted range of decrease of piece；
It is high by the compensation sagitta of arcMended
Repay arc radius of curvature：
EP (end of program).
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made, it all should fall into the protection domain of claims of the present invention determination.
Claims (7)
1. a kind of Ortho-K, including mirror body, the inner surface of the mirror body is outwards disposed with moulding area, positioning arc from center
Area and circumference arc area, it is characterised in that base curve area that the moulding area includes outwards setting gradually from center, compensation arc area and anti-
Zhuan Hu areas, the compensation arc area can keep moulding area's rise constant when adjusting the near-sighted range of decrease.
2. Ortho-K according to claim 1, it is characterised in that the radius of curvature in the compensation arc area
Wherein WCCArc for compensation arc area is wide, sagCCFor the rise in compensation arc area, WBCArc for base curve area is wide.
3. the customization piece segmental arc parameter generation method of a kind of Ortho-K, it is characterised in that the Ortho-K includes mirror
Body, the inner surface of the mirror body are outwards disposed with moulding area, positioning arc area and circumference arc area from center, the moulding area include from
Base curve area, compensation arc area and the reversion arc area that center is outwards set gradually, the customization piece segmental arc parameter generation method are included such as
Lower step：
1) user finds out the piece of trying on being adapted in geometric shape by trying on, and the moulding of matching cornea is determined in piece from trying on
Area rise sagOT；
2) the near-sighted range of decrease that piece is actually needed with user is tried in contrast on, if trying the near-sighted range of decrease D of piece onTIt is actually needed with user
Near-sighted range of decrease DCIt is identical, then it will customize parameter setting phase of the parameter of each section of arc in the moulding area of piece with trying each section of the moulding area of piece arc on
Together, the near-sighted range of decrease D of piece is tried onTThe near-sighted range of decrease D being actually needed with userCDiffer, then perform step 3)；
3) radius of curvature R in adjustment compensation arc areaCC：
According to the near-sighted range of decrease D of customization pieceCWith central planar K0Value, first determine the base curve radius of curvature R of customization pieceBCSweared with base curve
High sagBC, then obtain customize piece the high sag of the reversion sagitta of arcRC, it is last according to the moulding area's rise sag for trying piece onOTCalculate benefit
The radius of curvature R in Chang Hu areasCC；
4) the radius of curvature parameter of each arc in moulding area of customization piece is determined, the ginseng that most matches of positioning arc is then determined in piece from trying on
Number, the parameter of generation customization all segmental arcs of piece.
4. customization piece segmental arc parameter generation method according to claim 3, it is characterised in that in step 3), adjustment compensation
The radius of curvature R in arc areaCCSpecific method be：
Calculate the base curve radius of curvature of customization pieceWherein n be cornea infractive index, KBCFor the K values of base curve, so
After obtain base curve riseWherein WBCArc for base curve area is wide；
The reversion sagitta of arc for calculating customization piece is highWherein RRCTo invert curved rate
Radius, WRCArc for reversion arc area is wide, WCCArc for compensation arc area is wide；
It is high by the compensation sagitta of arcIt is compensated arc
Radius of curvature：
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5. customization piece segmental arc parameter generation method according to claim 4, it is characterised in that the K values K of base curveBC=K0-Dc-
M, wherein K0For the flat K values of user's Central corneal, M was to rectify amount.
6. customization piece segmental arc parameter generation method according to claim 4, it is characterised in that describedWherein
KRCTo invert the K values of arc, KRC=KBC+2×Dc, wherein DCTo customize the near-sighted range of decrease of piece.
7. customization piece segmental arc parameter generation method according to claim 3, it is characterised in that try the near-sighted range of decrease D of piece onT
The near-sighted range of decrease D being actually needed with userCIt is equal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711169933.3A CN107783314A (en) | 2017-11-21 | 2017-11-21 | A kind of Ortho-K and customization piece segmental arc parameter generation method |
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| CN201711169933.3A CN107783314A (en) | 2017-11-21 | 2017-11-21 | A kind of Ortho-K and customization piece segmental arc parameter generation method |
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| CN108646436A (en) * | 2018-07-30 | 2018-10-12 | 王江桥 | A kind of cornea K values superelevation or ultralow Ortho-K and its design method |
| 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 |
| 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 |
| CN113934016A (en) * | 2021-08-24 | 2022-01-14 | 天津世纪康泰生物医学工程有限公司 | Orthokeratology mirror based on artificial intelligence optimization algorithm |
| CN114185184A (en) * | 2020-09-14 | 2022-03-15 | 亨泰光学股份有限公司 | Cornea molding lens structure in parallel arc |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN108681100B (en) * | 2018-05-17 | 2020-01-07 | 珠海艾格医疗科技开发有限公司 | Method for manufacturing cornea shaping mirror |
| CN108646436A (en) * | 2018-07-30 | 2018-10-12 | 王江桥 | A kind of cornea K values superelevation or ultralow Ortho-K and its design method |
| CN114185184A (en) * | 2020-09-14 | 2022-03-15 | 亨泰光学股份有限公司 | Cornea molding lens structure in parallel arc |
| 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 |
| CN113934016A (en) * | 2021-08-24 | 2022-01-14 | 天津世纪康泰生物医学工程有限公司 | Orthokeratology mirror based on artificial intelligence optimization algorithm |
| CN113934016B (en) * | 2021-08-24 | 2024-04-16 | 天津世纪康泰生物医学工程有限公司 | Cornea shaping mirror based on artificial intelligence optimization algorithm |
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