CN208270872U - Correct the hard corneal contact lens of irregular cornea eyesight - Google Patents
Correct the hard corneal contact lens of irregular cornea eyesight Download PDFInfo
- Publication number
- CN208270872U CN208270872U CN201820561849.XU CN201820561849U CN208270872U CN 208270872 U CN208270872 U CN 208270872U CN 201820561849 U CN201820561849 U CN 201820561849U CN 208270872 U CN208270872 U CN 208270872U
- Authority
- CN
- China
- Prior art keywords
- cornea
- irregular
- region
- contact lens
- area
- 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.)
- Active
Links
Landscapes
- Eyeglasses (AREA)
Abstract
The utility model belongs to contact lens technique field, more particularly to a kind of hard corneal contact lens for correcting irregular cornea eyesight, the irregular cornea includes being located at irregular area and the normal region around irregular area, the hard corneal contact lens are major diameter contact lense, base curve region including that can be completely covered but not contact cornea irregular area, it is connected to the transition arcs region that the radian of base curve region outer edge and cornea normal region matches, and all arc regions of transition arcs region outer edge are set, it the transition arcs region can be with Corneal Contact, it is used to support and positions hard corneal contact lens.The utility model can be suitable for any cornea irregular area, it is supported on the outside of irregular corneal moieties by wider transition arcs, play good positioning action, and it is capable of forming the tear layer of the thin similar convex lens structure of thick middle surrounding, there is higher negative degree, the luminosity of eyeglass substantially reduces.
Description
Technical field
The utility model belongs to contact lens technique field, and in particular to one kind can correct the hard of irregular cornea eyesight
Property contact lens.
Background technique
Cornea is irregular caused by the keratopathies such as long-term loss or ulcer of the cornea, scar because of eyes, has sternly to eyesight
The influence of weight, a kind of common irregular cornea keratoconus is the Typical Representative of irregular cornea, and keratoconus refers to cornea
Bulging becomes taper forward, and the irregular cornea of the lower section of Central corneal is slightly biased at tip, and keratoconus can frequently result in disease
The high myopia of rationality.
Irregular cornea bring visual problems correction, which is got up, very to bother, and is difficult to improve using normal conventional gimmick, often
What is seen is by contact lens,hard, but conventional contact lens,hard cannot be complete not only for big corneal astigmatism currently on the market
Full correction, and cannot positioning well, while testing excessive with difficulty, operate inconvenience.Especially keratoconus causes
The problem that has defective vision, it is difficult to treat, have become the eye illness for being not easy to treat of the hardly possible in difficulty, usual patient is until cornea is sent out
Corneal transplantation is carried out when opening up the keratoconus middle and later periods to treat, however, health cornea source required for corneal transplantation is that have
Limit, while most of patient cannot restore good uncorrected visual acuity after transplanting；Another method is exactly at present using more
Crosslinking operation was also required to wear contact lense, and this operation is to do first mid-term, operation to treat after doing a operation
The development that can not solve keratoconus afterwards, also needs to put on contact lense mostly, to improve eyesight and protection cornea.But common
Keratoconus contact lense is worn on keratoconus because keratoconus irregularly causes the difficulty fitted, can also to glasses wearer with
Come uncomfortable, diameter low coverage is limited, and eyeglass slippery is dynamic big, will cause foreign body sensation by force and should not position, while returning to test and wear with person
To match the more difficult problem of mirror.
Chinese patent CN2916679Y discloses a kind of contact lenses for correcting keratoconus, includes contact lens,
Contact lenses on piece is made of base curve, circular cone arc, secondary arc and all arcs, base curve, circular cone arc, secondary arc and all arcs radian and its distinguish
The partial arcs of corresponding circular cone cornea are consistent, and base curve, circular cone arc, secondary arc and all arcs are not affixed with circular cone cornea
It closes, forms the tear-storing chamber that a both ends communicate with the outside world between contact lens and circular cone cornea.Both eye can preferably be protected
Corneal health, and can effectively correct keratoconus.
Although the program is also capable of forming a tear-storing chamber, in order to be suitable for keratoconus structure, eyeglass is used for it
Four kinds of segmental arcs, wherein base curve and circular cone arc are used to cover the cone shape among cornea, and secondary arc and all arcs are for being adapted to normal area
Domain, the high, complex process using processing cost when four sections of arcs, and the parameter considered when carrying out with mirror is more, difficulty is larger.Separately
Outside, program base curve, circular cone arc, secondary arc and all arcs do not fit with circular cone cornea, this, which will cause eyeglass, does not have supporting point,
Eyeglass and cornea can not form positioning, and the base curve and circular cone arc in eyeglass can not always cover the irregular area of cornea
Lid influences wearing effect, and for the program due to being for special keratoconus, cornea middle part has a very high conical process
It rises, as long as the radian of eyeglass is adapted with the arc of cornea, certain positioning action will be played, but irregular for other
Cornea shape, it is especially intermediate to be just applicable in without more high-crowned cornea shape, good antiskid action cannot be reached and used.
Keratoconus is in irregular shape, may accomplish that eyeglass is adapted to various types of keratoconus shapes there are many deformation
Shape is difficult to accomplish, larger with mirror difficulty, when cone shape is located at edge of cornea if it exists, just it is even more impossible to realize.
In addition, the radian due to original eyeglass is consistent with the radian of circular cone cornea, so that the tear liquid layer thickness formed is equal
Even, luminosity is high, the effect of not negative degree, and the eyeglass degree for needing to wear is high, leads to that eyeglass is blocked up, oxygen permeability is poor.
Utility model content
The utility model is directed to the deficiency of present technology, has designed and developed out a kind of rigid cornea for correcting irregular cornea
Contact lense, the contact lense can preferably protect cornea healthy, can also effectively correct the eyesight of irregular cornea, and test
Match very convenient.
To achieve the above object, the utility model adopts the following technical solutions:
A kind of hard corneal contact lens for correcting irregular cornea eyesight, the irregular cornea include being located at region of disorder
Domain and the normal region around irregular area, the hard corneal contact lens are major diameter contact lense, including can be complete
It all standing but do not contact the base curve region of cornea irregular area, be connected to the arc of base curve region outer edge Yu cornea normal region
The transition arcs region to match is spent, and all arc regions of transition arcs region outer edge are set, the transition arcs region can
With Corneal Contact, hard corneal contact lens are used to support and positioned.
Preferably, the diameter dimension of the major diameter contact lense is 9.5-11.5mm.
Further, the transverse width in the base curve region is greater than the transverse width of cornea irregular area, the base curve
The rise in region is greater than the rise of cornea irregular area highest zone.
Preferably, the rise in the base curve region and the rise difference of cornea irregular area are 0.15-0.25 ㎜.
Preferably, the width in the transition arcs region is 0.3-1.0 ㎜.
Preferably, the end in all arcs region is tilted to the periphery of cornea.
The hard corneal contact lens are used for any cornea irregular area, the cornea with any irregular shape size
Vision correction specifically can be used for keratoconus vision correction.
After the utility model contact lense is worn on cornea, there is tear between eyeglass and irregular corneal moieties, and pass through
Wider transition arcs are supported on the outside of irregular corneal moieties, play good positioning action, and limitation eyeglass or so moves
It is dynamic, and it is allowed to move up and down, so that the irregular area of cornea can be completely covered in base curve region always, and it is capable of forming
Between the thin similar convex lens structure of thick surrounding tear layer, have higher negative degree, luminosity substantially reduces, so that lens thickness also becomes
Thin, oxygen permeability is preferable；There is the positioning action of transition arcs, tear can preferably flow in tear layer in blink, tear
It being capable of free exchange.
The base curve region of the utility model can carry out all standing to the irregular area of cornea, with cornea irregular area
Shape is unrelated, only related with the highest point rise of irregular area, and such technology realizes that simple, the processing is simple, design is simple, at
This is low.
The utility model optic diameter is big compared with Conventional contact mirror, and base curve and transition arcs area is allowed to cover not advising for cornea
Then region, the radius of curvature of base curve obtain according to the curvature in corneal center region not instead of as Conventional contact mirror, pass through
The difference of eyeglass rise and cornea rise is set to determine.Compared with conventional contact lens,hard, advantage has: (1) due to not
With the position and specific geometry for considering irregular cornea, tests method of completing the square and greatly simplify and general；(2) many corneas are not advised
It is then partially in non-health physiological status, possesses tear between eyeglass and this part cornea always and is conducive to protect this segment angle
Film；(3) biggish base curve area (i.e. optics area) increases the visual field, can also have good visual effect when eyeglass sliding；
(4) the usually negative degree with higher of the tear mirror between eyeglass and cornea, therefore, for the user of high myopia, mirror
The luminosity of piece will substantially reduce.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the irregular cornea wearing contact lenses of the utility model.
Fig. 2 is the structural schematic diagram for the wearing contact lenses that the utility model is suitable for keratoconus.
Specific embodiment
Following embodiments are further explanations for the content of the present invention as to the utility model technology contents
Explaination, but the substantive content of the utility model is not limited in described in following embodiments, and those skilled in the art can
With and should know that any simple change based on the utility model in essence spirit or replacement should belong to the utility model and wanted
The protection scope asked.
Embodiment one
A kind of hard corneal contact lens for correcting irregular cornea eyesight, being applicable to any cornea irregular area is to appoint
Why not the cornea vision correction of regular shape size, as shown in Figure 1, the irregular cornea include be located at 11 He of irregular area
Normal region 20 around irregular area, the hard corneal contact lens are major diameter contact lense, including can be complete
It covers but does not contact the base curve region 1 of cornea irregular area, is connected to the arc of base curve region outer edge Yu cornea normal region
Degree, which matches, is used to support the transition arcs region 2 of hard corneal contact lens, and transition arcs region 2 is that unique energy and cornea can be opposite
The region of contact, and all arcs 3 of transition arcs region outer edge are set.
Contact in optical mirror slip refers to that the tear liquid layer thickness between eyeglass and cornea is less than or equal to 20um, has not implied that
Full connected.
In the present embodiment, the diameter dimension of the major diameter contact lense is 9.5-11.5mm.
The transverse width in the base curve region is greater than the transverse width of cornea irregular area, the rise in the base curve region
Greater than the rise of cornea irregular area highest zone, in embodiment, the rise in the preferably described base curve region is not advised with cornea
Then the rise difference in region is 0.15-0.25 ㎜, after eyeglass is worn on cornea, has tear between eyeglass and irregular corneal moieties
Liquid can preferably protect the health of cornea.
In the present embodiment, the width in the transition arcs region is 0.3-1.0 ㎜, and eyeglass is in the outer of cornea irregular area
Side is supported by transition arcs region, and crucial effect is played in the transition arcs region of the width to the positioning of eyeglass.
In this embodiment, base curve region 1 is located at the center of contact lense eyeglass, and base curve region 1 is completely covered cornea and does not advise
Then area 10 and optical region, protect irregular cornea visual range and irregular cornea top 11 while, avoid cornea
Contact lense and cornea completely attach to, furthermore in turn avoid tear accumulation excessively, while guaranteeing that patient's cornea is safe, also guarantee
The visual effect that patient wears.
Base curve region 1 using large area design, primarily to protect irregular cornea visual range and irregular angle
On the one hand the top 11 of film avoids contact lens and cornea from completely attaching to, it is excessive on the other hand to can avoid tear accumulation again.Base
The outside in arc region 1 is provided with the transition arcs region 2 of ultra-wide, and width cooperates adjustment according to corneal diameter size, specifically may be used
It is set as 0.3-1.0mm, while the cornea radian phase in the transition arcs region 2 and normal area 20, thus it enables that eyeglass obtains
Positioning well.There is the positioning action of transition arcs 2, tear can be free in tear intrastratal flow, tear in blink
Exchange.
The end of the week arc 3 is tilted to the periphery of cornea, it is ensured that tears can be exchanged preferably when blink, into one
Step ensure that the health of irregular cornea.
Being equipped with of base curve region 1 and transition arcs region 2 effectively ensure that haptic lens when being slided on cornea, base curve
Region is not contacted with irregular pupil region, when cornea irregular area is not contacted with contact lense, the base curve region meeting of eyeglass
There is thicker tear layer thicker, in blink, tearful eyes can be exchanged normally, so that the health of cornea is protected, big base curve region
The visual field and the visual effect of glasses wearer can be improved.Cornea irregular area can be completely covered but not contacted due to base curve region,
Without consistent with the radian of cornea irregular area, thicker tear layer is formed in cornea irregular area, additionally, due to transition
Arc region and Corneal Contact, form relatively thin tear layer in cornea regular domain, and thicker tear layer is located at the cornea at middle part not
Regular domain, relatively thin tear layer are located at the cornea regular domain of surrounding, convex lens structure are collectively formed so that eyeglass and cornea it
Between tear mirror negative degree with higher, therefore, for the user of high myopia, the luminosity of eyeglass will be substantially reduced.
Originally example two is applied
A kind of hard corneal contact lens for correcting irregular cornea eyesight, are applicable to keratoconus vision correction, such as Fig. 2
Shown, the keratoconus includes the normal area 40 in circular cone area 30 and keratoconus with cone top part 31, the irregular angle
It is big that film, which includes positioned at irregular area 11 and the normal region 20 around irregular area, the hard corneal contact lens,
Diameter contact mirror, including that can be completely covered but not contact the base curve region 1 of cornea irregular area, be connected to outside base curve region
The radian of edge and cornea normal region, which matches, is used to support the transition arcs region 2 of hard corneal contact lens, transition arcs region 2
It is the region that uniquely energy and cornea can contact relatively, and all arcs 3 of transition arcs region outer edge is set.
The transverse width in the base curve region is greater than the transverse width of cornea irregular area, the arrow in the base curve region 1
It is tall and big in the corresponding rise of cornea cone top part 31, the difference of the two is 0.15-0.25 ㎜ with specific reference to range.Eyeglass is worn on cornea
Afterwards, there is tear between eyeglass and keratoconus, can preferably protect the health of cornea, the transition arcs region 2 and circular cone
The radian in the normal area 40 of cornea coincide relatively, and the supporting arc of entire eyeglass.
In the present embodiment, the diameter dimension of the major diameter contact lense is 10-11.5mm.
Base curve region 1 is located at the center of contact lense eyeglass, and base curve region 1 is wrapped in cornea circular cone area 30 and optical region,
While guaranteeing that patient's cornea is safe, also guarantee the visual effect that patient wears.Base curve region 1 is designed using large area, main
If on the one hand avoiding contact lens and cornea to protect the visual range of keratoconus and the vertex of a cone part of keratoconus
It completely attaches to, it is excessive on the other hand to can avoid tear accumulation again.The outside in base curve region 1 is provided with the transition arcs region 2 of ultra-wide,
Its width cooperates adjustment according to corneal diameter size, can specifically be set as 0.3-1.0mm, while the transition arcs region 2 and circle
The cornea radian phase in the normal area 40 of cone angle film, thus it enables that eyeglass is positioned well.There is the positioning of transition arcs 2
Effect, in blink, tear can be with free exchange in tear intrastratal flow, tear.
Claims (8)
1. a kind of hard corneal contact lens for correcting irregular cornea eyesight, the irregular cornea includes being located at irregular area
The normal region being located at around irregular area and, it is characterised in that: the hard corneal contact lens are major diameter contact lense, packet
It includes and can be completely covered but not contact the base curve region of cornea irregular area, be connected to base curve region outer edge and cornea is normal
The transition arcs region that the radian in region matches, and all arc regions of transition arcs region outer edge, the transition arcs are set
Region can be used to support and position hard corneal contact lens with Corneal Contact.
2. the hard corneal contact lens of the irregular cornea eyesight of correction described in claim 1, it is characterised in that: the major diameter
The diameter dimension of contact lense is 9.5-11.5mm.
3. the hard corneal contact lens of the irregular cornea eyesight of correction described in claim 1, it is characterised in that: the base curve area
The transverse width in domain is greater than the transverse width of cornea irregular area, and the rise in the base curve region is greater than cornea irregular area
The rise of highest zone.
4. the hard corneal contact lens of the irregular cornea eyesight of correction as claimed in claim 3, it is characterised in that: the base curve area
The rise in domain and the rise difference of cornea irregular area are 0.15-0.25 ㎜.
5. the hard corneal contact lens of the irregular cornea eyesight of correction described in claim 1, it is characterised in that: the transition arcs
The width in region is 0.3-1.0 ㎜.
6. the hard corneal contact lens of the described in any item irregular cornea eyesights of correction of claim 1-5, it is characterised in that: institute
The end for stating all arc regions is tilted to the periphery of cornea.
7. the hard corneal contact lens of the irregular cornea eyesight of correction as claimed in claim 6, it is characterised in that: the hardness angle
Film contact lense is used for any cornea irregular area, the cornea vision correction with any irregular shape size.
8. the hard corneal contact lens of the irregular cornea eyesight of correction as claimed in claim 6, it is characterised in that: the hardness angle
Film contact lense is used for keratoconus vision correction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720468453 | 2017-04-30 | ||
| CN2017204684536 | 2017-04-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208270872U true CN208270872U (en) | 2018-12-21 |
Family
ID=64679494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820561849.XU Active CN208270872U (en) | 2017-04-30 | 2018-04-19 | Correct the hard corneal contact lens of irregular cornea eyesight |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208270872U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208653A (en) * | 2020-02-21 | 2020-05-29 | 杭州聚明医疗器械有限责任公司 | Novel sclera lens |
| CN112415779A (en) * | 2020-12-25 | 2021-02-26 | 沈阳百奥医疗器械有限公司 | Corneal contact lens capable of improving wearing comfort |
-
2018
- 2018-04-19 CN CN201820561849.XU patent/CN208270872U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208653A (en) * | 2020-02-21 | 2020-05-29 | 杭州聚明医疗器械有限责任公司 | Novel sclera lens |
| CN111208653B (en) * | 2020-02-21 | 2021-11-12 | 杭州聚明医疗器械有限责任公司 | Sclera lens |
| CN112415779A (en) * | 2020-12-25 | 2021-02-26 | 沈阳百奥医疗器械有限公司 | Corneal contact lens capable of improving wearing comfort |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI688797B (en) | Contact lens comprising non-coaxial lenslets for preventing and/or slowing myopia progression | |
| CN215494400U (en) | Myopia out-of-focus spectacle lens with superposed micro-lenses | |
| CN105388628B (en) | Pupil size independent lens design and method for preventing and/or slowing myopia progression | |
| EP2762953B1 (en) | Asymmetric lens design and method for preventing and/or slowing myopia progression | |
| CA2807846C (en) | Multi-axis lens design for astigmatism | |
| CN212781529U (en) | Functional clamping piece | |
| CA2812204C (en) | Asymmetric translating presbyopic contact lens | |
| IE831935L (en) | Bifocal soft contact lens | |
| KR102145171B1 (en) | Contact lens with improved fitting characteristics | |
| ES2949209T3 (en) | Induced aperture lens and method | |
| CA2812205C (en) | Translating presbyopic contact lens | |
| CN107085315A (en) | A kind of concentric circles defocus haptic lens | |
| CN208270872U (en) | Correct the hard corneal contact lens of irregular cornea eyesight | |
| CN208752324U (en) | an spectacle lens | |
| KR101936067B1 (en) | Contact Lens For keratoconus | |
| CN102262307A (en) | New soft cornea contact lens | |
| CN205404984U (en) | Panorama type contact lens | |
| CN115236877A (en) | Myopia Control Contact Lenses | |
| CN206906716U (en) | A kind of concentric circles defocus haptic lens | |
| AU2016225918B2 (en) | Multi-axis lens design for astigmatism | |
| CN213903977U (en) | Out-of-focus contact lens | |
| CN218728419U (en) | Four-quadrant area peripheral out-of-focus spectacle lens | |
| KR20080053041A (en) | Glasses for correcting vision | |
| WO2017013644A2 (en) | Contact lens for vision correction | |
| CN101813831A (en) | Spectacle lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |