CN103558695A - Orthokeratology lens - Google Patents
Orthokeratology lens Download PDFInfo
- Publication number
- CN103558695A CN103558695A CN201310204608.1A CN201310204608A CN103558695A CN 103558695 A CN103558695 A CN 103558695A CN 201310204608 A CN201310204608 A CN 201310204608A CN 103558695 A CN103558695 A CN 103558695A
- Authority
- CN
- China
- Prior art keywords
- ortho
- district
- arc
- arc district
- modulation waveform
- 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
Images
Landscapes
- Prostheses (AREA)
Abstract
The invention relates to an orthokeratology lens for myopia correction and control, wherein the inner surface is divided into four regions such as a base arc region, a reverse arc region, a modulation arc region and a periphery arc region from the center to the edge, the modulation arc region is a spherical or aspherical arc connected with the reverse arc region and the periphery arc region, and various small width waveform modulations are performed so as to effectively increase a center positioning function of the orthokeratology lens, promote lacrimal fluid exchange, optimize positive pressure of the base arc region, and increase the effective pressure surface of the base arc region.
Description
Technical field
The present invention relates to a kind of Ortho-K.
Background technology
Change based on heredity and modern way of life, myopia has developed into the serious problems that affect public life.Many countries and regions, comprise China, and adolescent myopia rate has reached 80%.Serious myopia in-depth also can cause glaucoma, cataract, and choroid is degenerated, retinal detachment, to such an extent as to blind.The eyes with twenty-twenty vision can focus on parallel incident ray on retina exactly.A nearsighted person's eyes, because axis oculi is long and/or corneal curvature is excessive, can only focus on parallel rays before retina, cause A nearsighted person not see thing far away.
Various myoporthosis technology are passed through correction of refractive errors below, the light that distant objects is sent again focal imaging on retina: traditional vision correction method is to wear suitable framework spectacles, yet this brings inconvenience to daily life and work.Common contact lens has been exempted the inconvenience of frame eyeglasses, but patient still need to be with at the moment wearing contact lense.Near-sighted operative treatment is comprised to laser in-situ cornea ablation art, keratomileusis, radial keratotomy and artificial lens etc., but operative treatment has nonreversibility, and may produce various concurrent and sequelae, and operative treatment is mostly not suitable for adolescent myopia patient.
Ortho-k uses the hard contact lense corneal with high oxygen permeability energy to carry out provisional reinventing, thereby changes the effect that CC Optical Region refractive power reaches myopia correction.Modern Ortho-K only needs A nearsighted person to wear Ortho-K when sleep, after sleeping, takes off, and can recover twenty-twenty vision by day.
The original design thinking of Ortho-K is to utilize to have one section of hard contact lens that is greater than the long arc of CC radius-of-curvature, to cornea, exert pressure and make cornea produce non-long-term deformation, central area radius-of-curvature increases, thereby the focus point of the parallel rays that distant objects is sent moves to retina before retina.The Ortho-K of manufacturing by this imagination can only very limitedly change CC curvature.A nearsighted person need to wear the eyeglass that radian increases gradually, uses the time that reaches several months to the several years to reach the effect of correcting defects of vision.
N Stoyan (US4,952,045) has first introduced has Ji Huqu, cus lacrimalis (arc reverses) district and San Duanhu district, circumference arc district Ortho-K concept.According to this imagination, the radius-of-curvature of Ji Huqu is greater than the radius-of-curvature of A nearsighted person's CC, and then Ji Huqu's is the circular arc that one section of radius-of-curvature is less than corresponding cornea district radius-of-curvature, between this circular arc and the anterior surface of cornea under it, form a space, this space is called as cus lacrimalis, with savings tear, and be received in thickening of corneal epithelial cell layer.Nei Jieleihu district, circumference arc district, contacts with anterior surface of cornea, and outwards perk.Circumference arc in the design of San Duanhu district forms line with anterior surface of cornea and contacts, as shown in Figure 1.One large disappearance of this design is that eyeglass easily moves, and centrally-located effect is bad.For strengthening the centrally-located of Ortho-K, T Reim (US5,963,297) proposes the design ，Ji Jihu district in Liao Siduanhu district, reversion arc district, and arc district, location and circumference arc district, as shown in Figure 2.In arc district, location, meet reversion arc district, external circumference arc district, is one section and descends the arc section of cornea epithelium layer close contact with it.This arc section has become face contact with the line contact contacting in the design of Cong Sanduanhu district of its lower cornea epithelium layer, thereby has strengthened the centrally-located function of Ortho-K.
Many designs of modern Ortho-K are all the concepts based on Si Duanhu district.The arc district, location with face contact becomes an indispensable part.Although the design in arc district, location has strengthened centrally-located function relatively, the centrally-located of Ortho-K is a problem of puzzlement Ortho-K all the time.The measurement of the corneal topography after orthokeratology is found, desirable topomap should be " buphthalmos " sample, and much the corneal topography after Ortho-k physiotherapy shows as " smiling face " or " frowning " sample, affected the result for the treatment of of Ortho-k.Wherein maximum reason is exactly Ortho-K displacement, and centrally-located is inaccurate.
Summary of the invention
The present invention will solve the easily technical matters of displacement of Ortho-K, improves centrally-located function and other correlated performances of Ortho-K.
Ortho-K of the present invention, the inside surface of mirror body from center to outside, have successively for reinvent keratocyte Ceng Jihu district, for save tear and be received in the reversion arc district thickening of corneal epithelial cell floor, for arc district, location, the circumference arc district of lens orientation, it is characterized in that: on the profile camber line in described arc district, location, with modulation waveform, form modulation arc district.
Further, described modulation waveform is the waveform of continuous sinusoidal wave or other relative baseline dipping and heaving.
Or described modulation waveform is the continuous wave that interior canting length is greater than outer canting length.
Or described modulation waveform is discontinuity wave.
Or described modulation waveform is only containing recessed half-wave.
Or described modulation waveform is only to contain the half-wave of epirelief.
The radius-of-curvature of Ji Huqu is greater than the radius-of-curvature before anterior surface of cornea is corrected, under the effect of keratocyte layer tear layer normal pressure under base arc inside surface, produce interim deformation, its radius-of-curvature progressively increases, the final Ortho-K base arc inside surface that coincide, reach desirable radius-of-curvature, thereby eyesight is corrected.Nei Jiejihu district, reversal zone, external modulation arc district, forms a space with the anterior surface of cornea under it.Tear tool negative pressure in reversal zone, and tear layer tool malleation under cornea Ji Huqu, thus tangential stress produced, impel the cell liquid Cong Jihu district in epithelium layer to shift to reversion arc district, epithelium layer thickens in reversal zone.Modulation arc district is in order to replace the location arc (figure tri-) in the Ortho-K design of typical Si Hu district.In modulation arc district, meet reversion arc district, external circumference arc district.Tradition location arc is one section of globular arc or smooth non-globular arc, for example, be oval, parabola shaped, hyperbola.Modulate location as above arc with small size waveform in modulation arc district, thereby to take former location arc be baseline in formation, the modulation arc district of amplitude scintillation.In circumference arc district, connect small size modulator zone, to the perk of cornea periphery.
Advantage of the present invention is: the centrally-located of Ortho-K is functional.
Accompanying drawing explanation
Fig. 1 is Ji Huqu of the prior art, the schematic diagram of reversion arc district and San Duanhu district, circumference arc district Ortho-K.
Fig. 2 is the schematic diagram of Si Duanhu of the prior art district Ortho-K.
Fig. 3 is schematic diagram of the present invention
Fig. 3 a is the partial schematic diagram of Fig. 3
Fig. 4 is that modulation waveform is the continuous wave that interior canting length is greater than outer canting length, and wherein waveform left side is cornea, and right shade place is eyeglass
Fig. 5 is that modulation waveform is discontinuity wave. wherein waveform left side is cornea, and right shade place is eyeglass
Fig. 6 is that modulation waveform only contains recessed half-wave, and wherein waveform left side is cornea, and right shade place is eyeglass
Fig. 7 is that modulation waveform only contains the half-wave of epirelief, and wherein waveform left side is cornea, and right shade place is eyeglass
Embodiment
With reference to accompanying drawing 3-7:
Ortho-K of the present invention, the inside surface of mirror body from center to outside, have successively for moulding keratocyte Ceng Jihu district 10, for save tear and be received in the reversion arc district 11 thickening of corneal epithelial cell floor, for the arc district 12, circumference arc district, location 13 of lens orientation, it is characterized in that: on the profile camber line in described arc district, location 12, with modulation waveform, form modulation arc district.
Described modulation waveform is continuous sine wave, as Fig. 3 a.
Or described modulation waveform is the continuous wave that interior canting length is greater than outer canting length, as Fig. 4.
Or described modulation waveform is discontinuity wave, as Fig. 5.
Or described modulation waveform is only containing recessed half-wave, as Fig. 6.
Or described modulation waveform is only to contain the half-wave of epirelief, as Fig. 7.
Ortho-K is covered on cornea 14 when wearing.
Circumference arc district produces surface tension in the perk of anterior surface of cornea because of the existence of tear, and surface tension pulls to Ortho-K corneal epithelial cell layer then.And the normal pressure producing by tear floor in the Shi Jihu district of equilibrium surface tension and slightly modulator zone, and the negative pressuren zone forming by tear in reversion arc district.Take Fig. 3 as example, and former location arc is modulated by a continuous sine wave shape, forms respectively lower protruding and fovea superior.Corneal stroma in modulator zone and epithelium layer are yielded to little protruding below modulator zone baseline; In corneal stroma and the upper concave space of epithelium layer more than modulator zone baseline, thickened simultaneously.Anterior surface of cornea forms contoured surface at modulator zone according to moulding mirror modulation waveform thus.Corneal undulations surface produces following two effects: one, and be effectively increased in the contact area of the interior anterior surface of cornea of modulator zone and Ortho-K, thereby strengthen the centrally-located function of Ortho-K.Two, it is staggered identical that the fluctuating front surface of cornea and Ortho-K are slightly modulated arc lower surface.This coupled structure can prevent Ortho-K displacement, and then strengthens the centrally-located function of Ortho-K.
The shape of modulation arc can be various, can be with sinusoidal, polynomial expression, and progression or other various mathematical form are expressed.All kind of modulations waveform must be followed following principle: one.The selection of modulation waveform should be not damage cornea, do not cause that wearer's discomfort is advisable.Two.The amplitude of modulation waveform is unsuitable excessive, not form bubble in modulation arc district, is limited.Three.In modulation waveform, lower protruding and base width fovea superior generally should be greater than the amplitude of lower protruding and fovea superior.Four.Modulation arc district integral body should seamlessly transit, and to avoid wedge angle, the corneal such as sudden change joint portion cause damage.
The general pressure that the moulding effect of Ortho-K depends on Ortho-K in sizable degree is in ，Ji Jihu district, two confined areas and arc district, location, between pressure distribution.Ru Jihu district dispense pressure is excessive, locates arc district dispense pressure too small, can cause Ortho-K displacement, and centrally-located is inaccurate; As it is too small to locate the excessive ，Ze Jihu arc of dispense pressure district, arc district dispense pressure, can cause the epithelium layer degree of caving in cornea central optical zone inadequate, can not reach the desired value that vision correction arrives, especially higher at near-sighted degree, such as-5D, in the situation of-6D.After replacing arc district, location with modulation arc district, modulation arc district only uses less dispense pressure, just can provide and the nothing Ortho-K centrally-located effect that slightly the arc district, location of waveform modulated is equal to mutually, correspondingly increase the dispense pressure in Liao Jihu district, the cornea that has strengthened Ortho-K corneal center is reinvented effect.Thereby can meet simultaneously, central optical zone cornea caves in and eyeglass centrally-located.
Because the centrally-located function same with the arc district, location of the small size waveform modulated of nothing can just can play by less dispense pressure in modulation arc district, thereby make to utilize the width in modulation arc district can do than less without the arc district, location of small size waveform modulated, the corresponding overall diameter that dwindles Ortho-K.Meanwhile, while designing in the arc district, location that adopts the small size waveform modulated of nothing, the corneal epithelial cell floor contacting with arc district, location and corneal stroma are because of pressurized attenuation, and the reversion arc district that it is adjacent and the epithelium layer in circumference arc district thicken with regard to corresponding.The design in modulation arc district makes the variation of the general thickness of cornea epithelium layer in modulator zone less, so the also corresponding reduction of increase of cornea epithelium layer volume in the reversion arc district bordering on the phase.Therefore the reversion arc district in the design can be less than the arc sector width that reverses in the design of typical Si Hu district.This can further reduce the overall diameter of Ortho-K again.The Ortho-K with less overall diameter is more convenient when putting on and take off, and also can increase the comfort level of wearer when wearing.Because crowd's of Chinese origin cornea mean diameter is less than normal compared with other crowd, this makes the design of modulating arc district seem more valuable.
The effect of tear pump is played in the circumference arc district of Ortho-K when nictation, and fresh tear flows into reversion He Jihu district, arc district through locating arc district or modulation arc of the present invention district, to the cornea being positioned under eyeglass, carries essential oxygen and nutrition.Theoretical according to the tear extruding under the relevant Ortho-Ks such as J Mountford, between the tear district of different-thickness, can form pressure reduction, promote tear exchange.In arc district, tradition location, tear thickness is basically identical, has hindered the exchange of tear.The existence recessed and/or epirelief of modulation arc district internal cause also changes tear thickness thereupon, can effectively promote the tear exchange that Ortho-K is inside and outside, keeps the health of cornea.
The modulation arc district design with lower protruding waveform can also strengthen Ortho-K in the centrally-located having on astigmatic cornea.Arc district, tradition location possibly cannot touch the anterior surface of cornea on the higher curvature meridian of the eyeball that is positioned at tool higher angular film front surface astigmatism, affects the centrally-located function of eyeglass.The lower protruding anterior surface of cornea that can touch on higher curvature meridian in modulation arc district, thereby the centrally-located of enhancing Ortho-K.
The design in modulation arc district is also applicable to treat the Ortho-K of long sight, in order to replace arc district, location.
The design in modulation arc district is also applicable to other kinds contact lens, hard or soft.
The design in modulation arc district is also applicable to have Ortho-K and the other kinds contact lens of ring curved design.
Content described in this instructions embodiment is only enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also and in those skilled in the art, according to the present invention, conceive the equivalent technologies means that can expect.
Claims (7)
1. Ortho-K, the inside surface of mirror body from center to outside, have successively for reinvent corneal epithelial cell Ceng Jihu district, for save tear and receive the reversion arc district thickening of corneal epithelial cell floor, for arc district, location, the circumference arc district of lens orientation, it is characterized in that: on the profile camber line in described arc district, location, with modulation waveform, form modulation arc district.
2. Ortho-K as claimed in claim 1, is characterized in that: described modulation waveform be continuous sinusoidal wave or other there is the waveform of relative baseline dipping and heaving.
3. Ortho-K as claimed in claim 1, is characterized in that: described modulation waveform is the continuous wave that interior canting length is greater than outer canting length.
4. Ortho-K as claimed in claim 1, is characterized in that: described modulation waveform is discontinuity wave.
5. Ortho-K as claimed in claim 1, is characterized in that: described modulation waveform is only containing recessed half-wave.
6. Ortho-K as claimed in claim 1, is characterized in that: described modulation waveform is only to contain the half-wave of epirelief.
7. Ortho-K as claimed in claim 1, is characterized in that: described modulation waveform can be used trigonometric function, polynomial expression, progression or other various mathematical form statements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310204608.1A CN103558695A (en) | 2013-05-28 | 2013-05-28 | Orthokeratology lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310204608.1A CN103558695A (en) | 2013-05-28 | 2013-05-28 | Orthokeratology lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103558695A true CN103558695A (en) | 2014-02-05 |
Family
ID=50012991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310204608.1A Pending CN103558695A (en) | 2013-05-28 | 2013-05-28 | Orthokeratology lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103558695A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107085315A (en) * | 2017-06-21 | 2017-08-22 | 王桂云 | A kind of concentric circles defocus haptic lens |
| 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 |
| CN110426861A (en) * | 2019-08-30 | 2019-11-08 | 裴兰 | A kind of cornea moulding contact lense and its design method |
| CN111134613A (en) * | 2019-11-21 | 2020-05-12 | 明灏科技（北京）有限公司 | Image recognition-based orthokeratology lens fitting method and system |
| WO2022096758A1 (en) * | 2020-11-05 | 2022-05-12 | Paune Fabre Jaime | Contact lens |
| EP4273619A1 (en) | 2022-05-04 | 2023-11-08 | Pauné Fabré, Jaime | Orthokeratology contact lens |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5191365A (en) * | 1991-08-23 | 1993-03-02 | Nick Stoyan | Corneal contact lens and method for treating myopia |
| US5963297A (en) * | 1997-06-27 | 1999-10-05 | Reim; Thomas Russell | Orthokeratology contact lens and method therefor |
| US20050105046A1 (en) * | 2000-11-17 | 2005-05-19 | Hsiao-Ching Tung | Orthokeratology and bi-focal contact lens |
| CN2914127Y (en) * | 2006-06-28 | 2007-06-20 | 陶悦群 | Contact lens for correcting eyesight |
| CN102047172A (en) * | 2008-06-06 | 2011-05-04 | 全球美好视觉公司 | Soft contact lenses for treating ametropia |
| CN203311108U (en) * | 2013-05-28 | 2013-11-27 | 邵海平 | Orthokeratology lens |
-
2013
- 2013-05-28 CN CN201310204608.1A patent/CN103558695A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5191365A (en) * | 1991-08-23 | 1993-03-02 | Nick Stoyan | Corneal contact lens and method for treating myopia |
| US5191365B1 (en) * | 1991-08-23 | 2000-08-15 | Contex Inc | Corneal contact lens and method for treating myopia |
| US5963297A (en) * | 1997-06-27 | 1999-10-05 | Reim; Thomas Russell | Orthokeratology contact lens and method therefor |
| US20050105046A1 (en) * | 2000-11-17 | 2005-05-19 | Hsiao-Ching Tung | Orthokeratology and bi-focal contact lens |
| CN2914127Y (en) * | 2006-06-28 | 2007-06-20 | 陶悦群 | Contact lens for correcting eyesight |
| CN102047172A (en) * | 2008-06-06 | 2011-05-04 | 全球美好视觉公司 | Soft contact lenses for treating ametropia |
| CN203311108U (en) * | 2013-05-28 | 2013-11-27 | 邵海平 | Orthokeratology lens |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107085315A (en) * | 2017-06-21 | 2017-08-22 | 王桂云 | A kind of concentric circles defocus haptic lens |
| CN107085315B (en) * | 2017-06-21 | 2023-07-14 | 王桂云 | Concentric circle defocus contact lens |
| 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 |
| CN110426861A (en) * | 2019-08-30 | 2019-11-08 | 裴兰 | A kind of cornea moulding contact lense and its design method |
| CN111134613A (en) * | 2019-11-21 | 2020-05-12 | 明灏科技（北京）有限公司 | Image recognition-based orthokeratology lens fitting method and system |
| WO2022096758A1 (en) * | 2020-11-05 | 2022-05-12 | Paune Fabre Jaime | Contact lens |
| EP4273619A1 (en) | 2022-05-04 | 2023-11-08 | Pauné Fabré, Jaime | Orthokeratology contact lens |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4618596B2 (en) | Bifocal contact lens for cornea correction | |
| US8936362B2 (en) | Contact lens for keratoconus | |
| TWI570470B (en) | Ophthalmic device | |
| CN103558695A (en) | Orthokeratology lens | |
| US8888277B2 (en) | Contact lens with improved fitting characteristics | |
| CN211293489U (en) | Multifocal corneal contact lens | |
| CN203311108U (en) | Orthokeratology lens | |
| WO2019109862A2 (en) | Orthokeratology lens and method for manufacture thereof | |
| JP2021092820A (en) | Comfort-optimized contact lens system for non-rotationally symmetric eye aberration | |
| CN108008544A (en) | Method for manufacturing Ortho-K | |
| US20200391457A1 (en) | Mold for contact lens with non-rotationally symmetric rim or edge | |
| CN204964916U (en) | Orthokeratology | |
| CN114740635A (en) | Four-quadrant asymmetric orthokeratology mirror | |
| CN215986770U (en) | Cornea plastic mirror for reshaping front surface shape of cornea | |
| CN107728338B (en) | Cornea shaping mirror | |
| CN208092366U (en) | Ortho-K | |
| CN103718086A (en) | Contact lenses having hybrid orientation features | |
| CN208756305U (en) | Ortho-K for presbyopic correction | |
| CN202693923U (en) | Two-in-one orthokeratology lenses | |
| CN208270872U (en) | Correct the hard corneal contact lens of irregular cornea eyesight | |
| CN205920285U (en) | Many basic arc contact lens | |
| CN103309054A (en) | Full-out-of-focus pressure pasting lens | |
| RU2780271C1 (en) | Orthokeratological lens to slow down the development of myopia | |
| WO2018069665A1 (en) | Contact lens for an eye with keratoconus | |
| CN208334814U (en) | A kind of Ortho-K |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140205 |