CN208092366U - Ortho-K - Google Patents
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- CN208092366U CN208092366U CN201721682214.7U CN201721682214U CN208092366U CN 208092366 U CN208092366 U CN 208092366U CN 201721682214 U CN201721682214 U CN 201721682214U CN 208092366 U CN208092366 U CN 208092366U
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Abstract
The utility model is related to Ortho-Ks, inner surface towards eye cornea and the outer surface opposite with the inner surface when Ortho-K is included in wearing, the inner surface includes centrally located base curve area, wherein, the base curve area has the shape consistent with the base curve area for oppressing anterior surface of cornea and fashioning into anterior surface of cornea, wherein, the base curve area includes two or more regions, and at least two in the two or more regions have different radius of curvature.
Description
Technical field
The utility model is related to Ortho-Ks, and relating more specifically to base curve area has the cornea of more than one radius of curvature
Moulding mirror.
Background technology
Presbyopia is that people step into the visual problem necessarily occurred after person in middle and old age.With age, eye regulating power is gradual
Decline regards nearly difficulty so that near work so as to cause patient, it is necessary to separately add convex lens except the correction of its static refraction
Can just there are clearly near vision, this phenomenon to be known as presbyopia.With modern people's improvement of living standard, especially like to be beautiful women
To the middle age, they increasingly improve in the requirement to image, it is desirable to oneself keep young state at any time, it is undesirable to stick one's chin out old
Colored state, puzzlement caused by presbyopic problem are increasingly severe.Current presbyopia mainly by wearing reading glasses, operation, pendant outside
The modes such as multifocal contact lenses are worn to solve.Outer contact lenses worn presbyopic glasses or worn in the daytime etc. are outer wear mode in convenience, rectify
There are problems in terms of plus effect, correction stability, especially outer to wear presbyopic glasses, seriously affect wearer's image.Operation refers mainly to
Cornea implant, or all kinds of multifocal intraocular lenses of implantation, this kind of correction mode are all irreversible, are produced to human ocular tissues
Raw damage, there is a problem of different degrees of in terms of safety, and the people of this age bracket has generally arrived the cataract high-incidence season,
Other eye treatments, such as cataract operation etc. are subsequently faced, the mode of operation brings serious puzzlement to subsequent procedures.Therefore
It is badly in need of a kind of hidden, effective, safe presbyopia corrective measure.
Cornea is moulding to use rigid air-permeable type contact lens（Abbreviation Ortho-K）It is a kind of high oxygen flow hardness material of use
Material is made, by temporarily changing corneal surface shape, to reach the product for temporarily sexually revising ametropic purpose.This is a kind of reversible
Property, Non-surgical correction of refractive errors product, the pattern that usually night wears（Mirror sleep is worn at night, plucks mirror daytime）, wearer's wearing
The ametropia problem " being cured " of oneself is thought afterwards, and is not constrained by any external condition on daytime, is rectified with other eyesights
Positive means are compared, and will not be brought any additional puzzlement, are a kind of very outstanding vision correction means.
Ortho-K dioptric, which rescues principle and common contact lens, the difference of essence, is worn at night, optics
Optical effect is not played in area itself, but by the wearing of certain time, anterior surface of cornea is modelled as Ortho-K optics
Area's rear surface（Also known as base curve area）Shape, so that the refractive power of cornea itself is changed, realize the effect rescued of dioptric.If
The flat curvature shaft radius of ratio cornea itself that the base curve area of Ortho-K is done is more flat, then plays the work of myoporthosis
With；If the flat curvature shaft radius of ratio cornea itself that Ortho-K base curve area is done is more precipitous, distance vision correction is played
Effect.
In several stages of the development experience of Ortho-K, it is divided into a variety of designs such as three arc areas, four arc areas, multi sphere area,
The design in whichever stage, the design of base curve area are all consistent, and are one section of complete circular arcs, other several common structures of segmental arc
At geometry designs, auxiliary base curve reaches compressing to cornea and moulding, makes to generate between eyeglass inner surface, tear, corneal epithelium
The resultant force that generates of activity of fluidics power, eyeglass mechanical pressure and eyelid strength is imposed to cornea middle section.Fig. 1 shows
The schematic diagram of Ortho-K is gone out, wherein BC is base curve area, and RC is reversion arc area, and AC is to match the areas Shi Hu, and PC is optional side
Arc area.Ortho-K can not also have the areas Bian Hu, such as the Ortho-K of some three arc areas design, with suitable arc and side
Arc is integrated straight line arc.
Base curve area is the main treatment region of Ortho-K, and traditional Ortho-K base curve area is each designed to a ball
Face, radius of curvature require to be designed according to the decreasing concentration of patient.The existing Ortho-K overwhelming majority is directed to near-sightedness correction
It is designed.It finds that after some patientss wear Ortho-K near-sighted type periphery defocus can be generated during Clinical practice,
Axis oculi is controlled to increase, thus Ortho-K is used for adolescent myopia more and rescues and prevention and control, is then disclosed in WO2004/015479
A kind of Ortho-K of the more precipitous correction long sight of base curve area axis more flat than cornea.
Long sight has essence different from presbyopia, and long sight is a kind of ametropia, and presbyopia is a kind of adjusting force forfeiture.Presbyopia
Patient needs ensureing that clearly realization regards close function to distant vision simultaneously.Currently without any type Ortho-K
Correcting action can be played to presbyopia.
Utility model content
The utility model provides a kind of Ortho-K, towards eye cornea when the Ortho-K is included in wearing
Inner surface and the outer surface opposite with the inner surface, the inner surface include centrally located base curve area, wherein it is described
Base curve area has the shape consistent with the base curve area for oppressing anterior surface of cornea and fashioning into anterior surface of cornea, wherein
The base curve area includes two or more regions, and at least two in the two or more regions have different curvature
Radius.
In one embodiment, two or more regions in the base curve area include centrally located circular center
Domain and concentric circle ring areas of one or more around the central area.
In one embodiment, the radius of curvature in two or more regions in the base curve area, which is radially presented, alternately becomes
Change.
In one embodiment, the radius of curvature in two or more regions in the base curve area gradually subtracts outward from center
It is small.
In one embodiment, the diameter of the central area is more than 1mm, preferably more than 2mm.
In one embodiment, two or more regions in the base curve area are two or more sector regions, and
And the two or more sector regions collectively constitute the base curve area.
In one embodiment, two or more regions in the base curve area are two or more sector regions, institute
It further includes the smooth transition region between each two adjacent sector region to state base curve area, and wherein, it is described two or
More sector regions and the smooth transition region collectively constitute the base curve area.
In one embodiment, two or more regions in the base curve area are in irregular shape.
In one embodiment, two or more regions in the base curve area are positioned at intermediate first area and position
Second area in the first area both sides and third region, and the first area, the second area and described
Three regions collectively constitute the base curve area.
In one embodiment, two or more regions in the base curve area are positioned at intermediate first area and position
Second area in the first area both sides and third region, the base curve area further include positioned at the first area and described
The first smooth transition region between second area and second between the first area and the third region flat
Sliding transitional region, and wherein, the first area, the second area, the third region, first smooth transition region
Domain and second smooth transition region collectively constitute the base curve area.
In one embodiment, two or more regions in the base curve area are first area and second area, described
First area is a part for annulus, and the center of the second area has complete circular portion, and wherein, described first
Region and the second area collectively constitute the base curve area.
In one embodiment, two or more regions in the base curve area are first area and second area, described
First area is a part for annulus, and the center of the second area has complete circular portion, and the base curve area further includes
Smooth transition region between the first area and the second area, and wherein, the first area, described
Two regions and the smooth transition region collectively constitute the base curve area.
In one embodiment, it is+0.5D extremely+5.0D, preferably+0.75D to+3.5D by the T that following formula is calculated,
More preferably+1.0D to+3.0D：
Wherein, R1For the maximum curvature radius in the base curve area, unit mm, R2For the minimum curvature half in the base curve area
Diameter, unit mm, n are the refractive index of cornea, value 1.3375.
In one embodiment, the maximum curvature radius in the base curve area is 6.0mm to 10.5mm, and preferably 7.0mm is extremely
10.0mm。
In one embodiment, the minimum profile curvature radius in the base curve area is 5.51mm to 10.34mm, preferably 5.65mm
To 9.85mm, more preferably 6.53mm to 9.71mm.
In one embodiment, a diameter of 4.5mm to 7.0mm in the base curve area, preferably 5.0mm to 6.8mm, it is more excellent
5.2mm is selected as to 6.5mm.
In one embodiment, the base curve area is circular.
In one embodiment, the base curve area is oval.
The utility model at least has the following advantages that.
（1）The base curve area of the Ortho-K of the utility model has more than one radius of curvature, and cornea can be made to mould
More than one focus is formed after shape, using mirror is worn at night, plucks the wearing mode of mirror daytime, realizes ametropia merging with presbyopia
Correction, it is convenient, beautiful, effective, more meet pursuit of the modern to quality of the life.
（2）The correction mode eyeglass such as frame-generic presbyopic glasses, common multifocal contact lenses cannot keep synchronous, trouble with eyeball
Person needs according to lens position after wearing and sees that the position of thing is constantly adjusted, or occurs when eyeglass occurs not placed in the middle
The states such as dazzle, blurred vision, dizziness；Center condition is naturally in when Ortho-K is worn, no matter user sees to which
Orientation is all not in the blurred vision generated because lens position changes and not applicable.
（3）Presbyopia patient age is larger, and majority enters the cataract high-incidence season.The work based on keratocyte of the utility model
Property, it is reversible correction, after deactivating a period of time, cornea can be restored to original state, without any damage, facilitate patient follow-up
Other eye treatments, it is safer for modus operandi.
Term defines
Unless special circumstances, otherwise following definition is applicable in the term used in this manual.
Base curve area（BC）It is most central positioned at Ortho-K, it is the inner surface in optics area, for oppressing anterior surface of cornea simultaneously
Anterior surface of cornea is modelled as its shape, it is moulding after the cornea region be optics area, play the role of optical imagery.
Invert arc area（RC）It is the Two Areas closely coupled with base curve area, plays connection base curve area and with the areas Shi Hu
Effect, forms gap between Ortho-K and anterior surface of cornea, plays the role of storing tear and tear is promoted to circulate.
With the areas Shi Hu（AC）It is called positioning arc area, match arc area etc., close to reversion arc area, the region and cornea shape
Match, plays the role of positioning.
The areas Bian Hu（PC）It is optional, is located at Ortho-K outer most edge, and it is closely coupled with the areas Shi Hu, it is general than with suitable
Arc area is more flat, with anterior corneal surface present it is certain turn over rake angle degree, ensure cornea and moulding mirror periphery tear, oxygen exchange and
Circulation.
Depending on closely referring to seeing nearby, refer generally to see at eyes about 30cm, corresponding eyesight is near vision.
It refers to seeing at a distance depending on remote, refers generally to see apart from eyes about 5m that at a distance, corresponding eyesight is distant vision.
Refer to seeing depending in it is remote, close between, refer generally to see other than eyes about 30cm, the distance within 5m, it is corresponding
Eyesight is intermediate range eyesight.
In addition, unless otherwise defined, otherwise the meaning of all scientific and technical terminologies used herein is led with belonging to the utility model
The technical staff in domain, which is generally understood, to be consistent.If any inconsistent, be subject to this specification and its including definition.
Description of the drawings
Fig. 1 schematically shows the side cross-sectional view of Ortho-K.
Fig. 2 schematically shows the base curve areas of Ortho-K according to the present utility model.
Fig. 3 A schematically show the base curve area of the Ortho-K of a specific embodiment according to the present utility model.
Fig. 3 B schematically show the base curve area of the Ortho-K of a specific embodiment according to the present utility model.
Fig. 4 A schematically show the base curve area of the Ortho-K of a specific embodiment according to the present utility model.
Fig. 4 B schematically show the base curve area of the Ortho-K of a specific embodiment according to the present utility model.
Fig. 5 A schematically show the base curve area of the Ortho-K of a specific embodiment according to the present utility model.
Fig. 5 B schematically show the base curve area of the Ortho-K of a specific embodiment according to the present utility model.
Fig. 5 C schematically show the base curve area of the Ortho-K of a specific embodiment according to the present utility model.
Fig. 5 D schematically show the base curve area of the Ortho-K of a specific embodiment according to the present utility model.
Specific implementation mode
Following specific examples is only intended to be further explained explanation to the utility model, but the utility model
It is not limited to specific embodiment below.Any variation on the basis of these embodiments, as long as it is new to meet this practicality
The spirit and range of type, all will fall within the protection scope of the utility model.
The refractive status of cornea is mainly determined by its radius of curvature.In practical clinical, the radius of curvature of cornea with
Common conversion relation between corneal diopter：
（1）
Wherein, K is the diopter of cornea, and unit D, R are the radius of curvature of anterior surface of cornea, and unit mm, n are cornea
Refractive index.For example, n can be 1.3375.
As shown in Figure 1, inner surface IS when Ortho-K is included in wearing towards eye cornea and with inner surface phase
To outer surface OS.The inner surface IS of Ortho-K includes centrally located base curve area BC, is located at base curve area BC radial outsides
Circular ring shape reversion arc area RC and match the areas Shi Hu AC positioned at the circular ring shape of reversion arc area RC radial outsides.In some implementations
In example, the inner surface IS of Ortho-K can also include the areas the Bian Hu PC for being located at the circular ring shape with the areas Shi Hu AC radial outsides.
When wearing, the base curve area BC of Ortho-K is contacted with the front surface of eye cornea.When patient occurs ametropia, pass through
The base curve area BC of Ortho-K adjusts the radius of curvature of eye cornea front surface, that is, adjusts the R in above formula, so as to reality
The ametropic correction of existing human eye.In below Fig. 2, Fig. 3 A-3B, Fig. 4 A-4B and Fig. 5 A-5D, shown in base curve area BC be round
Shape.However, in some embodiments, base curve area BC can also have other shapes, such as ellipse, oval etc..
The utility model creatively proposes that the base curve area of Ortho-K has at least two different radius of curvature, makes
Human eye after wearing Ortho-K, optical zones of cornea generate at least two focuses, to make the ametropia of patient and
Presbyopia is corrected simultaneously.
In Ortho-K according to the present utility model, base curve area includes two or more regions.The two of base curve area
At least two in a or more region have different radius of curvature.The face shape in two or more regions in base curve area can
To be spherical surface, the face shape for being either aspherical or a part of region is spherical surface and the face shape in remaining region is aspherical.
Include four regions A, B, C and D Fig. 2 shows base curve area.As needed, four regions A, B, C and D can have any shape.
At least two in four regions A, B, C and D have different radius of curvature.
In some embodiments, two or more regions in base curve area 100 include centrally located circular center
Domain 1001And surround the central area 1001The concentric circle ring areas 100 of one or more2、1003、1004…。
In some embodiments, two or more regions 100 in base curve area 1001、1002、1003、1004... curvature
Radius, which is radially presented, alternately to be changed.Particularly, in some embodiments, base curve area 100 has radially to present and alternately change
Two different radius of curvature, wherein the region 100 in base curve area 1002m-1With first curvature radius, and base curve area 100
Region 1002mWith the second curvature radius different from first curvature radius, wherein m is greater than the integer equal to 1.Especially
Ground, in some embodiments, base curve area 100 have three kinds of different radius of curvature that alternately variation is radially presented, wherein base
The region 100 in arc area 1003m-2With first curvature radius, the region 100 in base curve area 1003m-1With different from first curvature half
The second curvature radius of diameter, also, the region 100 in base curve area 1003mWith different from first curvature radius and second curvature radius
Third radius of curvature, wherein m is greater than the integer equal to 1.Certainly, in further embodiments, base curve area 100 can be with class
As have radially present alternately variation other quantity different radius of curvature.
For example, in one embodiment, Ortho-K 10 is made of high oxygen flow hard material.Ortho-K 10 it is interior
Surface includes base curve area 100, reversion arc area 200, matches the areas Shi Hu 300 and the areas Bian Hu 400.The overall diameter of Ortho-K 10 is
10.4mm, wherein the interior diameter of a diameter of 6.0mm in base curve area 100, reversion arc area 200 are 6.0mm, overall diameter 7.8mm.
Interior diameter with the areas Shi Hu 300 is 7.8mm, overall diameter 9.4mm.The interior diameter in the areas Bian Hu 400 is 9.4mm, and overall diameter is
10.4mm.The center thickness of Ortho-K 10 is 0.22mm.
In this embodiment, as shown in Figure 3A, base curve area 100 includes central area 1001And surround central area 1001
Three concentric circle ring areas 1002、1003With 1004.Central area 1001A diameter of 3mm.Circle ring area 1002It is interior straight
Diameter is 3mm, overall diameter 4mm.Circle ring area 1003Interior diameter be 4mm, overall diameter 5mm.Circle ring area 1003Interior diameter
For 5mm, overall diameter 6mm.Region 1001、1002、1003With 1004Radius of curvature present alternately change, wherein central area
1001With circle ring area 1003Radius of curvature it is identical, such as can be 8.88mm, and circle ring area 1002With 1004Curvature
Radius is identical, such as can be 8.54mm.
By wearing the Ortho-K 10, patient plucks cornea after mirror while providing remote, nearly two focuses.Cornea with
Central area 1001With circle ring area 1003The refractive power in corresponding two regions be 38.0D, the correction of realization -5.0D myopia, from
And realize clearly distant vision.Cornea with circle ring area 1002With 1004The refractive power in corresponding two regions is 39.5D,
The additional optical focal power that attached+1.5D on the basis of distant vision, to realize the function of presbyopia correction.
In the embodiment as shown in fig. 3 a, base curve area includes three concentric circle ring areas.In addition, base curve area can also wrap
Include the concentric annular regions of other quantity.In the embodiment as shown in fig. 3 a, each region in base curve area is using two different
Radius of curvature replaces, and provides two focuses.In addition, each region in base curve area can also be used more than two different curvature half
Diameter replaces, to generate more than two focus.The diameter of central area and the width of circle ring area（Namely overall diameter with it is interior straight
The half of the difference of diameter）It can be adjusted according to the pupil size of patient, the requirement etc. to being clear degree.
In some embodiments, two or more regions 100 in base curve area 1001、1002、1003... radius of curvature from
Center is gradually reduced outward.
For example, in one embodiment, Ortho-K 10 is made of high oxygen flow hard material, including it is base curve area 100, anti-
The areas Shi Hu 300 and the areas Bian Hu 400 are matched by the areas Zhuan Hu 200.The overall diameter of Ortho-K 10 is 10.9mm, wherein base curve area 100
A diameter of 6.5mm, the interior diameter in reversion arc area 200 is 6.5mm, overall diameter 8.3mm.Interior diameter with the areas Shi Hu 300 is
8.3mm, overall diameter 9.9mm.The interior diameter in the areas Bian Hu 400 is 9.9mm, overall diameter 10.9mm.In Ortho-K 10
Heart thickness is 0.22mm.
In this embodiment, as shown in Figure 3B, base curve area 100 includes central area 1001And surround central area 1001
Four concentric circle ring areas 1002、1003、1004With 1005.Central area 1001A diameter of 4mm.Circle ring area 1002's
Interior diameter is 4mm, overall diameter 4.5mm.Circle ring area 1003Interior diameter be 4.5mm, overall diameter 5mm.Circle ring area 1004
Interior diameter be 5mm, overall diameter 5.5mm.Circle ring area 1005Interior diameter be 5.5mm, overall diameter 6.5mm.Region
1001、1002、1003、1004With 1005Radius of curvature be gradually reduced outward from center.For example, central area 1001Curvature half
Diameter can be 7.85mm, circle ring area 1002Radius of curvature can be 7.76mm, circle ring area 1003Radius of curvature can be
7.67mm, circle ring area 1004Radius of curvature can be 7.58mm, circle ring area 1005Radius of curvature can be 7.50mm.
The Ortho-K 10 cornea of wearer can be shaped as being followed successively by from center to edge refractive power 43.0D,
43.5D, 44.0D, 44.5D, 45.0D realize the diopter gradually changed, the additional light focus of realization+0.5D to+2.0D gradual changes
Degree.
In the embodiment shown in figure 3b, base curve area includes central area and four concentric circle ring areas, radius of curvature
It is gradually reduced outward from center, to provide five kinds of different diopters.In addition, base curve area can also include the same of other quantity
Heart circle ring area, to provide the different diopters of other quantity.The diameter of central area and the width of circle ring area（?
That is the half of the difference of overall diameter and interior diameter）It can be adjusted according to the pupil size of patient, the requirement etc. to being clear degree
It is whole.
The periphery defocus of myopiaization refers to that refractive power of opthalmic optics' system on periphery is larger, and the focus point of formation, which is fallen within, to be regarded
Before nethike embrane, clinical evidence shows that the periphery defocus of myopiaization can be used for the control of adolescent myopia.The technology of the utility model
Technique effect caused by scheme further includes：Teenager wears the Ortho-K described in the technical solution, can form near-sightedization
Defocus prevents axis oculi from increasing, and retarding myopia is deepened.
In some embodiments of the utility model, central area 1001Diameter be more than 1mm, preferably more than 2mm.
In other embodiments of the utility model, two or more regions in base curve area are two or more fans
Shape region, two or more sector regions collectively constitute base curve area.In other embodiments of the utility model, base curve area
Two or more regions be two or more sector regions, base curve area further includes being located at each two adjacent sector region
Between smooth transition region, and two or more sector regions and smooth transition region collectively constitute base curve area.
For example, in one embodiment, Ortho-K is made of high oxygen flow hard material, including it is base curve area 100', anti-
The areas Zhuan Hu 200', match the areas the Shi Hu 300' and areas Bian Hu 400'.The overall diameter of Ortho-K 10' is 10.6mm, wherein base curve area
The interior diameter of a diameter of 6.2mm of 100', reversion arc area 200' are 6.2mm, overall diameter 8.0mm.With in the areas Shi Hu 300'
A diameter of 8.0mm, overall diameter 9.6mm.The interior diameter of the areas Bian Hu 400' is 9.6mm, overall diameter 10.6mm.Ortho-K
Center thickness be 0.16mm.
In one embodiment, as shown in Figure 4 A, two or more regions of the base curve area 100' of Ortho-K are
Sector region 100'1And 100'2, and sector region 100'1And 100'2Collectively constitute base curve area 100'.In this embodiment,
Sector region 100'1Central angle be 240 °, and sector region 100'2Central angle be 120 °.
In one embodiment, as shown in Figure 4 B, two or more regions of the base curve area 100' of Ortho-K are
Sector region 100'1And 100'2.Base curve area 100' further includes being located at sector region 100'1And 100'2Between smooth transition region
Domain 100'3And 100'4, and sector region 100'1And 100'2And smooth transition region 100'3And 100'4Collectively constitute base curve
Area 100'.In this embodiment, sector region 100'1Central angle be 220 °, and sector region 100'2Central angle be
100°.Sector region 100'1Radius of curvature be 9.0mm, and sector region 100'2Radius of curvature be 9.78mm.It is smoothed
Cross region 100'3And 100'4Central angle be 20 °.
By wearing the Ortho-K, after cornea is shaped, the refractive power of far region is regarded as 37.5D, near reading range domain
Refractive power is 34.5D, the sector region 100' of the base curve area 100' of Ortho-K1And 100'2It can provide+3.0D's for cornea
Additional optical focal power makes wearer while reaching regarding far with regarding nearly bifocus, the luminous energy accounting of two focuses is 2.2:1.Due to two
A sector region is connected by smooth transition region, therefore trace of the cornea without apparent subregion after patient's wearing.
In the embodiment shown in Fig. 4 A, 4B, base curve area includes two sector regions.In addition, base curve area can also include
More than two sector region, to generate more than two focus.Sector region and the central angle of smooth transition region can bases
It needs to be adjusted.
In other embodiments of the utility model, two or more regions in base curve area can be in irregular shape
's.
For example, in one embodiment, as shown in Figure 5A, two or more regions of base curve area 100'' are in being located at
Between first area 100''1And it is located at the first area 100''1The second area 100'' of both sides2With third region
100''3, and first area 100''1, second area 100''2With third region 100''3Collectively constitute base curve area 100''.?
In another embodiment, as shown in Figure 5 B, two or more regions of base curve area 100'' are positioned at intermediate first area
100''1And it is located at the first area 100''1The second area 100'' of both sides2With third region 100''3, base curve area
100'' can also include being located at first area 100''1With second area 100''2Between the first smooth transition region 100''4
And it is located at first area 100''1With third region 100''3Between the second smooth transition region 100''5, and the firstth area
Domain 100''1, second area 100''2, third region 100''3, the first smooth transition region 100''4With the second smooth transition region
Domain 100''5Collectively constitute base curve area 100''.
In the embodiment shown in Fig. 5 A, 5B, first area 100''1Radius of curvature be 7.30mm, second area
100''2Radius of curvature be 7.00mm, third region 100''3Radius of curvature be 7.63mm.After cornea is shaped, the firstth area
Domain 100''1Generate the refractive power of 46.2D, second area 100''2Generate 48.2D refractive powers, third region 100''3It generates
The refractive power of 44.2D can be realized for human eye in being regarded depending on remote ,+2.0D ,+4.0D regards close whole eyesight.
In the embodiment shown in Fig. 5 A, 5B, two or more regions in base curve area are three areas in irregular shape
Domain.In addition, two or more regions in base curve area can also be the region in irregular shape of other quantity, to generate other
The focus of quantity.
For example, in one embodiment, as shown in Figure 5 C, two or more regions of base curve area 100''' are the firstth areas
Domain 100'''1With second area 100'''2, first area 100'''1It is a part for annulus, second area 100'''2Center
With complete circular portion, and first area 100'''1With second area 100'''2Collectively constitute base curve area 100'''.?
In the embodiment, first area 100'''1Radius of curvature be 7.50mm, second area 100'''2Radius of curvature be
7.85mm.After cornea is shaped, first area 100'''1Generate the refractive power of 45.0D, second area 100'''2Generate 43.0D
Refractive power, can be that human eye realizes that regarding remote ,+2.0D regards close eyesight.First area 100'''1Central angle be 200 °, second
Region 100'''2Central angle be 160 °, second area 100'''2Center have complete circular portion, it is a diameter of
2.0mm.In another embodiment, as shown in Figure 5 D, two or more regions of base curve area 100''' are first areas
100'''1With second area 100'''2, first area 100'''1It is a part for annulus, second area 100'''2Center tool
It further includes being located at first area 100''' to have complete circular portion, base curve area 100'''1With second area 100'''2Between
Smooth transition region 100'''3, and first area 100'''1, second area 100'''2With smooth transition region 100'''3Altogether
With composition base curve area 100'''.In this embodiment, first area 100'''1Radius of curvature be 8.44mm, second area
100'''2Radius of curvature be 7.85mm, third region 100'''3For smooth transition portion, width 0.1mm, radius of curvature
Between first area and the radius of curvature of second area.After cornea is shaped, first area 100'''1Generate 40.0D's
Refractive power, second area 100'''243.0D refractive powers are generated, can be that human eye realizes that regarding remote ,+3.0D regards close eyesight.Firstth area
Domain 100'''1Central angle be 220 °, second area 100'''2Central angle be 120 °, second area 100'''2Center has
Complete circular portion, a diameter of 1.8mm.
In the embodiment shown in Fig. 5 C, 5D, two or more regions in base curve area are two areas in irregular shape
Domain.In addition, two or more regions in base curve area can also be the region in irregular shape of other quantity, to generate other
The focus of quantity.
The maximum curvature radius in base curve area is determined according to following formula：
（2）
Convolution（1）It obtains：
（3）
Wherein, n is the refractive index of cornea, and R is the original curvature radius of users cornea's front surface, and unit mm, K are
Correction of refractive errors amount, unit D, R1For the maximum curvature radius in base curve area, unit mm.May be used rafractive,
The modes such as inserted sheet optometry measure the original curvature radius R and correction of refractive errors amount K of the anterior surface of cornea of wearer.
The minimum profile curvature radius in base curve area is determined according to following formula：
（4）
I.e.：
（5）
Wherein, n is the refractive index of cornea, R1For the maximum curvature radius in base curve area, unit mm, T are wearer institute
The presbyopic correct amount needed, unit D, R2For the minimum profile curvature radius in base curve area, unit mm.
The presbyopic correct amount T needed for wearer is determined according to the presbyopic degree of wearer.If wearer is in distant vision
On the basis of correct correction, see that the nearly attainable minimum distance of institute is M, unit mm, then the presbyopic correct amount needed for wearer
For：
（6）
Normally the presbyopic correct amount T of human eye is+0.5D to+5.0D.
In some embodiments, the diopter K of eye cornea be 38.0D to 47.0D, correction of refractive errors amount K be-
6.0D to 1.0D, then can be according to formula（2）The maximum curvature radius R in base curve area is calculated1For 6.0mm to 10.5mm.In conjunction with upper
Range is stated, according to formula（5）The minimum profile curvature radius R in base curve area can be calculated2.Table 1 shows according to the present utility model one
The data of a little embodiments, wherein the refractive index n of cornea is 1.3375.
The maximum curvature radius R in 1 base curve area of table1And its corresponding minimum curvature half at different presbyopic correct amount T
Diameter R2
In some embodiments of the utility model, Ortho-K is that the presbyopic correct amount T that human eye is realized is+0.5D
To+5.0D, preferably+0.75D to+3.5D, more preferably+1.0D to+3.0D.
In some embodiments of the utility model, the maximum curvature radius in base curve area is 6.0mm to 10.5mm, preferably
7.0mm to 10.0mm.
In some embodiments of the utility model, the minimum profile curvature radius in base curve area is 5.51mm to 10.34mm, preferably
For 5.65mm to 9.85mm, more preferably 6.53mm to 9.71mm.
In some embodiments of the utility model, a diameter of 4.5mm to 7.0mm in base curve area, preferably 5.0mm is extremely
6.8mm, more preferably 5.2mm are to 6.5mm.
Although reference（It is one or more）Exemplary embodiment describes the utility model, but those skilled in the art
It will be understood that the utility model is not limited to precise structure and component part described herein, and without departing from such as institute
In the case of the spirit and scope of the utility model that attached claim limits, various modifications, variation are understood that from the description of front
And deformation.The utility model is not limited by the shown sequence of step because some steps can in a different order and/or
It is carried out at the same time with other steps.Therefore, the utility model is not limited to disclosed（It is one or more）Specific embodiment, but will
It will include all embodiments being within the purview of the appended claims.
Claims (25)
1. a kind of Ortho-K, the inner surface when Ortho-K is included in wearing towards eye cornea and with it is described
The opposite outer surface of inner surface, the inner surface include centrally located base curve area, wherein the base curve area is for oppressing cornea
Front surface simultaneously fashions into anterior surface of cornea with the shape consistent with the base curve area, which is characterized in that the base curve area packet
Two or more regions are included, at least two in the two or more regions have different radius of curvature.
2. Ortho-K according to claim 1, which is characterized in that wrap in two or more regions in the base curve area
Include centrally located circular central area and around the concentric circle ring area of the one or more of the central area.
3. Ortho-K according to claim 2, which is characterized in that two or more regions in the base curve area
Radius of curvature, which is radially presented, alternately to be changed.
4. Ortho-K according to claim 2, which is characterized in that two or more regions in the base curve area
Radius of curvature is gradually reduced outward from center.
5. Ortho-K according to claim 2, which is characterized in that the diameter of the central area is more than 1mm.
6. Ortho-K according to claim 2, which is characterized in that the diameter of the central area is more than 2mm.
7. Ortho-K according to claim 1, which is characterized in that two or more regions in the base curve area are
Two or more sector regions, and the two or more sector regions collectively constitute the base curve area.
8. Ortho-K according to claim 1, which is characterized in that two or more regions in the base curve area are
Two or more sector regions, the base curve area further include the smooth transition region between each two adjacent sector region
Domain, and wherein, the two or more sector regions and the smooth transition region collectively constitute the base curve area.
9. Ortho-K according to claim 1, which is characterized in that two or more regions in the base curve area are
Positioned at intermediate first area and the second area positioned at the first area both sides and third region, and firstth area
Domain, the second area and the third region collectively constitute the base curve area.
10. Ortho-K according to claim 1, which is characterized in that two or more regions in the base curve area
It is positioned at intermediate first area and the second area positioned at the first area both sides and third region, the base curve area is also
Include the first smooth transition region between the first area and the second area and is located at the first area
The second smooth transition region between the third region, and wherein, it is the first area, the second area, described
Third region, first smooth transition region and second smooth transition region collectively constitute the base curve area.
11. Ortho-K according to claim 1, which is characterized in that two or more regions in the base curve area
It is first area and second area, the first area is a part for annulus, and the center of the second area has completely
Circular portion, and wherein, the first area and the second area collectively constitute the base curve area.
12. Ortho-K according to claim 1, which is characterized in that two or more regions in the base curve area
It is first area and second area, the first area is a part for annulus, and the center of the second area has completely
Circular portion, the base curve area further include the smooth transition region between the first area and the second area, and
And wherein, the first area, the second area and the smooth transition region collectively constitute the base curve area.
13. Ortho-K according to claim 1, which is characterized in that the T being calculated by following formula be+0.5D to+
5.0D：
Wherein, R1For the maximum curvature radius in the base curve area, unit mm, R2It is single for the minimum profile curvature radius in the base curve area
Position is mm, and n is the refractive index of cornea, value 1.3375.
14. Ortho-K according to claim 1, which is characterized in that the T being calculated by following formula be+0.75D extremely
+3.5D：
Wherein, R1For the maximum curvature radius in the base curve area, unit mm, R2It is single for the minimum profile curvature radius in the base curve area
Position is mm, and n is the refractive index of cornea, value 1.3375.
15. Ortho-K according to claim 1, which is characterized in that the T being calculated by following formula be+1.0D to+
3.0D：
Wherein, R1For the maximum curvature radius in the base curve area, unit mm, R2It is single for the minimum profile curvature radius in the base curve area
Position is mm, and n is the refractive index of cornea, value 1.3375.
16. Ortho-K according to claim 1, which is characterized in that the maximum curvature radius in the base curve area is
6.0mm to 10.5mm.
17. Ortho-K according to claim 1, which is characterized in that the maximum curvature radius in the base curve area is
7.0mm to 10.0mm.
18. Ortho-K according to claim 1, which is characterized in that the minimum profile curvature radius in the base curve area is
5.51mm to 10.34mm.
19. Ortho-K according to claim 1, which is characterized in that the minimum profile curvature radius in the base curve area is
5.65mm to 9.85mm.
20. Ortho-K according to claim 1, which is characterized in that the minimum profile curvature radius in the base curve area is
6.53mm to 9.71mm.
21. Ortho-K according to claim 1, which is characterized in that a diameter of 4.5mm in the base curve area is extremely
7.0mm。
22. Ortho-K according to claim 1, which is characterized in that a diameter of 5.0mm in the base curve area is extremely
6.8mm。
23. Ortho-K according to claim 1, which is characterized in that a diameter of 5.2mm in the base curve area is extremely
6.5mm。
24. Ortho-K according to claim 1, which is characterized in that the base curve area is circular.
25. Ortho-K according to claim 1, which is characterized in that the base curve area is oval.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721682214.7U CN208092366U (en) | 2017-12-06 | 2017-12-06 | Ortho-K |
| US16/770,314 US11662606B2 (en) | 2017-12-06 | 2018-11-30 | Orthokeratology lens and method for making orthokeratology lenses |
| PCT/CN2018/118438 WO2019109862A2 (en) | 2017-12-06 | 2018-11-30 | Orthokeratology lens and method for manufacture thereof |
| JP2020547273A JP7028987B2 (en) | 2017-12-06 | 2018-11-30 | Orthokeratology lens and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721682214.7U CN208092366U (en) | 2017-12-06 | 2017-12-06 | Ortho-K |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208092366U true CN208092366U (en) | 2018-11-13 |
Family
ID=64068292
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721682214.7U Active CN208092366U (en) | 2017-12-06 | 2017-12-06 | Ortho-K |
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| Country | Link |
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| CN (1) | CN208092366U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728338A (en) * | 2017-12-06 | 2018-02-23 | 爱博诺德（北京）医疗科技有限公司 | Ortho-K |
| WO2019109862A3 (en) * | 2017-12-06 | 2019-08-01 | 爱博诺德（北京）医疗科技有限公司 | Orthokeratology lens and method for manufacture thereof |
| CN114545659A (en) * | 2022-03-03 | 2022-05-27 | 上海艾康特医疗科技有限公司 | Corneal contact lens and design method thereof |
-
2017
- 2017-12-06 CN CN201721682214.7U patent/CN208092366U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728338A (en) * | 2017-12-06 | 2018-02-23 | 爱博诺德（北京）医疗科技有限公司 | Ortho-K |
| WO2019109862A3 (en) * | 2017-12-06 | 2019-08-01 | 爱博诺德（北京）医疗科技有限公司 | Orthokeratology lens and method for manufacture thereof |
| US11662606B2 (en) | 2017-12-06 | 2023-05-30 | Eyebright Medical Technology (Beijing) Co., Ltd. | Orthokeratology lens and method for making orthokeratology lenses |
| CN107728338B (en) * | 2017-12-06 | 2024-01-26 | 爱博诺德(北京)医疗科技股份有限公司 | Cornea shaping mirror |
| CN114545659A (en) * | 2022-03-03 | 2022-05-27 | 上海艾康特医疗科技有限公司 | Corneal contact lens and design method thereof |
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