CN209422233U - A kind of contact lens - Google Patents
A kind of contact lens Download PDFInfo
- Publication number
- CN209422233U CN209422233U CN201721263320.1U CN201721263320U CN209422233U CN 209422233 U CN209422233 U CN 209422233U CN 201721263320 U CN201721263320 U CN 201721263320U CN 209422233 U CN209422233 U CN 209422233U
- Authority
- CN
- China
- Prior art keywords
- contact lens
- cornea
- eyeglass ontology
- contact
- utility
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses vitrectomy contact lens under a kind of non-contact wide-angle lens, are related to field of ophthalmological medical equipment, including device is supported on eyeglass and periphery, and periphery supports device to be provided with micro-protuberance, and contact lense is equipped with slot and micropore on convex surface.Contact lens periphery described in the utility model mirror surface is provided with four protrusions polished, and will wipe out with the conducting wire other than protrusion junction, and such device makes protrusion in surgical procedure not block the visual field, increases the oxygen transmission degree of cornea.Contact lense concave surface is coated with after viscoelastic agent, covering cornea or contact lense covering cornea to perfusion liquid is injected under mirror by the utility model, and bubble is discharged, can prevent bitot's patches in art, avoid the operation of dripping of assistant frequently.The utility model makes non-wide_angle viewing system and cornea hypotelorism, expands the visual field of operation, lasting to keep clearly fundus observation, improves the efficiency of operation.
Description
Technical field
The utility model relates to vitreous excision hands under field of ophthalmological medical equipment more particularly to a kind of non-contact wide-angle lens
Art contact lens.
Background technique
Ripe day by day with modern vitrectomy technology, non-contact wide-angle lens observing system does not contact eyeball because of it
The characteristics of and wider range of observation and favored, compared to contact wide-angle lens, non-contact wide-angle lens is clinically applied
It is more universal, but muddiness due to cornea exposure for a long time can become drying in air, and then influence the observation of operator.In order to
It solves the problems, such as this, clinically needs a special messenger assistant constantly toward trickle irrigation fluid injection on cornea at present, so that cornea keeps wet, this
Sample could more visible ground observing eye bottom.This mode by assistant's instillation perfusion liquid has following deficiency: one, frequently water influences hand
Art operation；Two, perfusion liquid, which is easy to splash on wide-angle mirror surface, influences surgical field of view；Three, long-time operation will cause the opacity of the cornea.
Foreign literature " Chihara T, Kita M.New type of antidrying lens for vitreous
surgery with a noncontact wide-angle viewing system"(Clin Ophthalmol.2013；7:
353-5.) once reporting prevents bitot's patches under non-contact wide_angle viewing system using contact lens.They manufacture and design
13 millimeters of contact lens diameter, 0.2 millimeter of thickness, 8.4 millimeters of radius of curvature.It performs the operation after measuring using contact lens
The visual field is wider compared with without using contact lens person.But this mirror needs special, development cost height, does not have to be commercialized and supply, does not obtain
It is universal to use.Separately there are scholar Ohji M, Tada E, Futamura H and Ohno H to be reported respectively by special meniscus shaped lens
It is placed in cornea to be used in combination with contactless wide-angle lens, the visual field can be made to amplify, it can be seen that more periphery.But since mirror body is thicker,
The fixed use of ring need to be stitched, also without marketization supply.Also there is " Kamei M etc. that RGP contact lens is used in combination
Commercially available rigid gas-permeable contact lens for protecting the
cornea from drying during vitrectomy with a wide viewing system.Clin
Ophthalmol.2012；6:1321-1324. ", but its have the shortcomings that price, be not easy to sterilize, stability it is poor.
Therefore, those skilled in the art is dedicated to developing vitrectomy cornea under a kind of non-contact wide-angle lens
Contact lense can prevent bitot's patches, persistently keep the clear of visual area, make do not having with simple, the easy to use feature of structure
Complete independently operation is possibly realized in the case where assistant.
Utility model content
In view of the above drawbacks of the prior art, technical problem to be solved in the utility model is filled in discontinuous instil
In the case where fluid injection, exposed bitot's patches how are prevented, keep visual area clear.
To achieve the above object, the utility model provides a kind of contact lens, including eyeglass ontology, the eyeglass sheet
Body has optics area and peripheral portion, and the eyeglass ontology has convex surface and concave surface, and the concave surface is spherical surface, in the eyeglass ontology
Peripheral portion be provided with multiple protrusions, the multiple protrusion is evenly distributed on the convex surface；The protrusion be it is cylindric, perpendicular to
The convex surface and have hollow structure；On the convex surface, there is slot, the slot is along the eyeglass between the multiple protrusion
25% of the radial distribution of ontology and the length of the slot no more than the optic diameter；Micropore is equipped in the slot, it is described micro-
The eyeglass ontology is run through in hole.
Further, the material of the eyeglass ontology be polymethyl methacrylate or fluorosilicone acrylate, it is described
Eyeglass ontology is formed by Shooting Technique processing and fabricating, and the refractive index of the material is 1.4~1.7.
Further, the optics area with a thickness of 0.15mm~0.3mm, the diameter in the optics area is 8mm.
Further, the radius of curvature of the concave surface is 7.8mm~8.0mm.
Further, the overall diameter of the eyeglass ontology is 11.5mm~12.0mm
Further, the concave surface is equipped with adhesion layer, and the adhesion layer material is viscoelastic agent or perfusion liquid.
Further, the height of the protrusion is 0.2mm~0.5mm.
Further, the internal diameter of the micropore is 0.3mm~0.5mm.
Further, the diopter of the eyeglass ontology is zero.
Further, the slot is arranged in the peripheral portion.
The utility model drips operation in view of the shortcomings of the prior art, providing one kind and saving assistant, lasting to maintain clearly
The contact lens of surgical field of view.The utility model specific technical solution is as follows:
Vitrectomy contact lens under non-contact wide-angle lens, the contact lense diameter d=12mm, curvature half
Diameter R=7.9mm, thickness h=0.5mm are coincide with anterior surface of cornea radius of curvature.Haptic lens material therefor is polymethyl
Sour methyl esters (PMMA) or fluorosilicone acrylate (FSA), refractive index are 1.4~1.7, are formed using injection molding.Contact lense
There are four protrusions for mirror surface peripheral portion, and eyelid is maintained to open state.The metal coating on contact lense surface is connected with conducting wire, by wire scissors
Remove, four protrusions polish as far as possible so that need to rotate in vitrectomy eyeball, mirror surface inclination when, avoid protrusion and block
Surgical field of view.Perfusion is injected under mirror after above-mentioned contact lense concave surface is coated with viscoelastic agent, covering cornea or contact lense covering cornea
Liquid is discharged bubble, can save the use of viscoelastic agent.
Vitrectomy is had the advantage that with contact lens under non-contact wide-angle lens described in the utility model
1, it can apply in the accurate operation of operation on vitreous, including the cutting of basal part vitreum, macula area film strip.
2, eyelid can be maintained to open state by four protrusions polished, guarantees operation not by eyelid closed action shadow
It rings.
3, conducting wire used is wiped out, and four protrusions are smoothed, and when Rotation of eyeball or mirror surface tilt, avoids protrusion screening
Keep off surgical field of view.
4 and cornea compactness it is good, size is bigger, light-weight, needs to rotate eyeball at observation periphery hole bottom, is expert at week
In the case where the press cutting of side, it is still able to maintain property, stability placed in the middle well；The irregularity degree on cornea is compensated for, view is improved
Wild clarity.
5, perfusion liquid is injected under mirror after concave surface coating viscoelastic agent, covering cornea or contact lense covering cornea, in this way can
Bubble is discharged, eliminates the use of viscoelastic agent.
6, design avoids the operation of dripping of assistant, and the assistance of assistant is not needed in operation, can be by doctor's complete independently.
7, design can make the distance of wide-angle lens digression film closer, the range of surgical field of view be increased, more conducively to periphery
The cutting of vitreum and the processing of peripheral retina lesion.
8, low-temperature plasma or oxirane disinfection can be used.
9, slot and micropore prevent cornea anoxic, and corneal edema is avoided to influence clarity.
Make furtherly below with reference to technical effect of the attached drawing to the design of the utility model, specific structure and generation
It is bright, to be fully understood from the purpose of this utility model, feature and effect.
Detailed description of the invention
Fig. 1 is the top view of the contact lens of a preferred embodiment of the utility model；
Fig. 2 is the side view of the contact lens of a preferred embodiment of the utility model.
Specific embodiment
Multiple preferred embodiments that the utility model is introduced below with reference to Figure of description, keep its technology contents clearer
Be easy to understand.The utility model can be emerged from by many various forms of embodiments, the protection of the utility model
Range is not limited only to the embodiment mentioned in text.
In the accompanying drawings, the identical component of structure is indicated with same numbers label, everywhere the similar component of structure or function with
Like numeral label indicates.The size and thickness of each component shown in the drawings are to be arbitrarily shown, and the utility model is not
Limit the size and thickness of each component.Apparent in order to make to illustrate, some places suitably exaggerate the thickness of component in attached drawing.
As depicted in figs. 1 and 2, ERG contact lens (ERG-jet, Fabrinal SA, La that the utility model uses
Chaux-de-Fonds, Switzerland), this contact lense 1 is process by plastic injection, as angle when checking for row ERG
The potential change of membrane electrode record retina visual sense cell photic stimuli.A diameter of 12 millimeters, radius of curvature is 7.9 millimeters,
It coincide with anterior surface of cornea radius of curvature.This contact lense 1 is convenient with acquisition, is easy improvement, is low in cost, can be repeated several times
The advantages of use.For its curvature closer to anterior surface of cornea, fitting is closer, so property placed in the middle and stability are more preferable.It does not influence
Periphery press operation, can make patient's complete independently perform the operation, save the time, reduce expenses, in modern minimal invasive vitrectomy
In be a very useful tool.
The contact lens of the utility model design has slot on the convex surface of eyeglass ontology between multiple protrusions, slot is set
It sets in the peripheral portion, slot is along the radial distribution of eyeglass ontology and the length of slot is not more than the 25% of the optic diameter；In slot
Equipped with micropore, micropore runs through the eyeglass ontology, and the internal diameter of micropore is 0.3mm, and the slot with micropore has good permeability,
Prevent cornea anoxic.
There are four protrusions 2 on the mirror surface periphery for the contact lens that the utility model uses to maintain eyelid to open state, dashes forward
Playing 2 is hollow structure, and inside has hole 3, and the height of protrusion 3 is 0.3 millimeter, and the metal coating on surface is connected with conducting wire.This reality
Conducting wire is wiped out with the novel technical solution, four protrusions polish as far as possible so that need to rotate in vitrectomy eyeball,
Protrusion is unlikely to block surgical field of view when mirror surface tilts.Contact lense Low-temperature Plasma Sterilization is spare.
In art using 23/25G vitreum diced system combine contactless wide_angle viewing system (Carl
Zeiss Meditec AG,Jena,Germany).By contact lense concave surface coating viscoelastic agent, the covering cornea after improvement, or contact
Perfusion liquid is injected under mirror after mirror covering cornea, and bubble is discharged, can save the use of viscoelastic agent.
The contact lens of the utility model design persistently provides clearly surgical field of view, can go on smoothly basal part glass
The accurate operations such as body is cut, macula area film strips.Even if observation periphery hole bottom needs to rotate eyeball, periphery press of being expert at is cut
When, contact lense is still able to maintain property, stability placed in the middle well.The assistance of assistant is not needed in art.Due to avoiding the drop of assistant
Water operation, so the distance of wide-angle lens digression film can be closer, can increase the range of surgical field of view, more conducively to week in this way
The cutting of side vitreum, the processing of peripheral retina lesion.
The preferred embodiments of the present invention have been described in detail above.It should be appreciated that this field ordinary skill without
It needs creative work according to the present utility model can conceive and makes many modifications and variations.Therefore, it is all in the art
Technical staff passes through logical analysis, reasoning, or a limited experiment according to the design of the utility model on the basis of existing technology can
It, all should be within the scope of protection determined by the claims with obtained technical solution.
Claims (10)
1. a kind of contact lens, which is characterized in that including eyeglass ontology, the eyeglass ontology has optics area and peripheral portion,
The eyeglass ontology is identical as the front surface radius of curvature of cornea, and the eyeglass ontology has convex surface and concave surface, and the concave surface is
Spherical surface, the concave surface is provided with multiple protrusions for covering contact cornea, in the peripheral portion of the eyeglass ontology, the multiple prominent
It rises and is evenly distributed on the convex surface；The protrusion be it is cylindric, perpendicular to the convex surface and have hollow structure；Described convex
On face, between the multiple protrusion have slot, the slot along the radial distribution of the eyeglass ontology and the length of the slot it is little
In the 25% of the optic diameter；Micropore is equipped in the slot, the micropore runs through the eyeglass ontology, and the micropore is for preventing
Only cornea anoxic.
2. contact lens as described in claim 1, which is characterized in that the material of the eyeglass ontology is polymethylacrylic acid
Methyl esters or fluorosilicone acrylate, the eyeglass ontology are formed by Shooting Technique processing and fabricating, and the refractive index of the material is
1.4~1.7.
3. contact lens as described in claim 1, which is characterized in that the optics area with a thickness of 0.15mm~0.3mm,
The diameter in the optics area is 8mm.
4. contact lens as described in claim 1, which is characterized in that the radius of curvature of the concave surface be 7.8mm~
8.0mm。
5. contact lens as described in claim 1, which is characterized in that the overall diameter of the eyeglass ontology be 11.5mm~
12.0mm。
6. contact lens as described in claim 1, which is characterized in that the concave surface is equipped with adhesion layer, the adhesion layer
Material is viscoelastic agent or perfusion liquid.
7. contact lens as described in claim 1, which is characterized in that the height of the protrusion is 0.2mm-0.5mm.
8. contact lens as described in claim 1, which is characterized in that the internal diameter of the micropore is 0.3mm~0.5mm.
9. contact lens as described in claim 1, which is characterized in that the diopter of the eyeglass ontology is zero.
10. contact lens as described in claim 1, which is characterized in that the slot is arranged in the peripheral portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721263320.1U CN209422233U (en) | 2017-09-28 | 2017-09-28 | A kind of contact lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721263320.1U CN209422233U (en) | 2017-09-28 | 2017-09-28 | A kind of contact lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209422233U true CN209422233U (en) | 2019-09-24 |
Family
ID=68000283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721263320.1U Expired - Fee Related CN209422233U (en) | 2017-09-28 | 2017-09-28 | A kind of contact lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209422233U (en) |
-
2017
- 2017-09-28 CN CN201721263320.1U patent/CN209422233U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Barnett et al. | Bcla clear-scleral lenses | |
| Gasson et al. | The contact lens manual: a practical guide to fitting | |
| Soni et al. | Overnight orthokeratology: refractive and corneal recovery after discontinuation of reverse-geometry lenses | |
| Zhong et al. | Differences between overnight and long-term wear of orthokeratology contact lenses in corneal contour, thickness, and cell density | |
| CN103281995A (en) | Methods and apparatus to identify eye coverings for vision | |
| TW201341885A (en) | Fractal features for enhanced tear exchange | |
| Tranoudis et al. | In-eye performance of soft contact lenses made from different materials | |
| CN209422233U (en) | A kind of contact lens | |
| JP2003215508A (en) | Contact lens and method of designing contact lens | |
| Arlt et al. | Clinical effect of tear layer thickness on corneal edema during scleral lens wear | |
| Young | Rigid lens design and fitting | |
| González-Méijome et al. | Correlations between central and peripheral changes in anterior corneal topography after myopic LASIK and their implications in postsurgical contact lens fitting | |
| Del Águila-Carrasco et al. | Assessment of corneal morphological changes induced by the use of daily disposable contact lenses | |
| Pearson | A review of the limitations of the first hydrogel contact lenses | |
| CN104375282A (en) | Cornea contact lens for vitreous retina operation | |
| Bennett et al. | Basic fitting | |
| Rugg-Gunn | Contact glasses | |
| Collins et al. | Clinical findings associated with incomplete blinking in soft lens wearers | |
| CN2290307Y (en) | Multipurpose ophthalmology measuring rule | |
| Sah et al. | The Effects of Soft Contact Lens Wear on Corneal Thickness, Curvature, and Surface Regularity | |
| CN110051323B (en) | Ophthalmology vision therapeutic instrument | |
| Knoll | The stability of the shape of the human cornea | |
| Young | Rigid Corneal Lens Design and Fitting | |
| CN115167004A (en) | Low-clearance scleral contact lens | |
| Neill | Contact lens haze |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190924 Termination date: 20200928 |