CN206659934U - Light source for corneal astigmatism real-time positioning apparatus - Google Patents
Light source for corneal astigmatism real-time positioning apparatus Download PDFInfo
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- CN206659934U CN206659934U CN201621067754.XU CN201621067754U CN206659934U CN 206659934 U CN206659934 U CN 206659934U CN 201621067754 U CN201621067754 U CN 201621067754U CN 206659934 U CN206659934 U CN 206659934U
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Abstract
It the utility model is related to a kind of light source for corneal astigmatism real-time positioning apparatus, the light source is used to carry out ellipse fitting in cornea upslide projection picture to determine corneal astigmatism shaft position, it is characterized in that, the light source includes concentric one or more annular illuminators, under actual operation operating environment, at least one transmitting light in one or more annular illuminators of the light source is after cornea projects, and the acquisition projection basically identical with the aperture used during pre-operative corneal radius of curvature measurement is as size.
Description
Technical field
Corneal astigmatism real-time positioning apparatus is the utility model is related to, corneal astigmatism is more particularly related to and positions dress in real time
The light source put.
Background technology
The utility model is a kind of light source of corneal astigmatism real-time positioning apparatus, patent CN103156572 partial content
It is incorporated herein by reference.
Astigmatism is a kind of common people's ametropia phenomenon, and it is inconsistent to refer to eyeball refractive power on different warps, or together
The diopter of one warp, so that the parallel rays into intraocular can not form focus on the retina, and form focal line
Phenomenon.Astigmatism is clinically divided into two kinds of regular astigmatism and irregular astigmatism.Two maximum warps of refractive power difference are main footpath
Line, two main warp lines are mutually perpendicular to, and are regular astigmatism；Each meridianal astigmatism flexibility is inconsistent, is irregular astigmatism.Wherein
Regular astigmatism can be corrected by Toric intraocular lenses.
Toric intraocular lens implantation in cases needs to dissipate using keratometer or corneal topographers corneal in the preoperative
Wide small and axial direction is accurately measured, and is calculated be implanted into intraocular lens's axle position in advance using online software for calculation, cut
Mouth position.In order to reach the effect of correction pre-operative corneal astigmatism, it is necessary to be bent in art to Toric IOL astigmatism axle mark lines and cornea
The most strong meridian of luminous power overlaps.The corneal astigmatism real-time positioning apparatus of CN103156572 inventions can be real in surgical procedure
When detect patient's corneal astigmatism axial direction, be very easy to operation technique.
Corneal astigmatism real-time positioning apparatus includes surgical operation microscope, camera device, image processing apparatus and display device, takes the photograph
As the output of device is connected with image processing apparatus, the output of image processing apparatus is connected with display device, surgical operation microscope mirror
Circular lamp body is coaxially provided with head, the lamp body is detachably arranged in surgical operation microscope camera lens.
Its based on principle be ellipse fitting, using a circular light source, by circular light source on cornea
Reflected image carries out ellipse fitting, indicates the long axis direction of ellipse, so as to indicate corneal astigmatism axial direction.
Its specific works step is：The light of lamp body reflects in human eye, and camera device is to from from surgical operation microscope
To reflected image shot, and image is delivered in image processing apparatus, is provided with to enter image in image processing apparatus
The unit of row ellipse fitting, ellipse fitting unit obtain reflection image on point set data, fit ellipse and indicate axial direction, image
Processing unit will mark surgical incision site according to oval axial direction and art source property astigmatism and crystal placement location is delivered to display dress
Display is put, doctor takes manual mode on patient's cornea, to be then operated the result queue of display；It is or logical
The location mark directly in observation display device is crossed to be operated.
Wherein, lamp body projects corneal plane, and it is particularly important to reflect to form ellipse this link.Oval situation,
Including shape, size, position, accuracy by the correctness of the direct astigmatism axial direction result for determining that follow-up fitting is obtained and accurately
Property.And the situation for obtaining ellipse depends on lamp body shape, lamp body and cornea relative position.
As it was previously stated, Toric intraocular lens implantation in cases is just for regular astigmatism patient, but even regular astigmatism
Patient, it is all regular astigmatism also not represent cornea in regional, and size and axle position and measurement aperture during detection of astigmatism have
Close, can change with the change in measurement aperture.Clinically by keratometer or corneal topographers corneal astigmatism
Detected.Corneal astigmatism size and it is axially measured in, doctor more it is suggested that using keratometer carry out manual measurement,
Higher repeatability and measurement accuracy can be obtained.The effective range of keratometer about within the 4mm of center, this
And the maximally effective optics area that Toric intraocular lenses play a role.
In corneal astigmatism real-time positioning apparatus, if the source diameter of device is excessive, it can cause to be fitted required projection
The size of picture exceeds the detection range of keratometer, then what the astigmatism axial direction being fitted very likely measured with keratometer
As a result it is different, influence detection and axial indication accuracy.And device space-consuming is too big easily to influence operation technique.
Meanwhile if the source diameter of device is too small, the major axis for the fitted ellipse that image capturing system obtained can be caused
It is undersized.Major axis dimension too small the problem of bringing of fitted ellipse, includes：（1）It is oval to cause axle with preoperative planning aperture difference
The problem of position indication accuracy；（2）In art it is oval be highly prone to patient motion, environment influence and cause elliptical center to shift,
Cause and significantly axially indicate axial mark jitter in error, and art, also, this elliptical center displacement for crossing small size
Extremely difficult uke recognizes and excluded；（3）Ellipse light spot is undersized, easily mutually mixed with the stray light spots of other positions
Confuse, for example, in art the stray light spots of cornea, sclera even on eye socket interference, and it is difficult to cause fitted ellipse to be found, and influences hand
Art efficiency.
In summary, the source diameter of corneal astigmatism real-time positioning apparatus is unsuitable excessive or too small, and it throws in anterior corneal surface
The fitted ellipse size penetrated should be basically identical and readily discernible with the detection aperture that is used during preoperative planning.
The shortcomings that existing corneal astigmatism real-time positioning apparatus, is that the size for not accounting for projection image is real-time to astigmatism
The influence of positioning accuracy.As shown in patent CN103156572 accompanying drawings 3, transverse of the device in eye cornea projection picture
Size is only 1.63mm ~ 1.78mm（Calculated according to eye cornea diameter range about 10.5 ~ 11.5mm）.The dimension of light source of the device
It is too small, cause the transverse of its projection picture on cornea undersized, and then cause axis of astigmatism to judge and preoperative mark
It is inconsistent, or in art mark acutely shake, or significantly axially sign error the problems such as.
Utility model content
The utility model proposes a kind of light source of corneal astigmatism real-time positioning apparatus, the light source is annular, is had suitable
In diameter, under actual operation operating environment, light source after cornea projects, obtain with being adopted during pre-operative corneal radius of curvature measurement
The basically identical projection in aperture ensures that fitting gained corneal astigmatism axle position is accurate, axially position and pre-operative corneal as size
Astigmatism testing result is consistent, reduces position error, and reduce art axis phase perturbation.
According to the utility model, it is proposed that a kind of light source for corneal astigmatism real-time positioning apparatus, the light source are used for
Ellipse fitting is carried out in cornea upslide projection picture to determine corneal astigmatism shaft position, it is characterised in that the light source includes concentric
One or more annular illuminators, under actual operation operating environment, one or more annulars of the light source light
For at least one transmitting light in body after cornea projects, acquisition and the aperture used during pre-operative corneal radius of curvature measurement are basic
Consistent projection is as size.
In one embodiment, at least one projection picture on cornea in one or more of annular illuminators
Diameter or transverse size between 1.8 ~ 3.5mm.
In one embodiment, at least one projection picture on cornea in one or more of annular illuminators
Diameter or transverse size between 2.0 ~ 3.0mm.
In one embodiment, at least one projection picture on cornea in one or more of annular illuminators
Diameter or transverse size between 2.2 ~ 2.8mm.
In one embodiment, the diameter of one or more of annular illuminators is between 65 ~ 215mm.
In one embodiment, the diameter of one or more of annular illuminators is between 70 ~ 160mm.
In one embodiment, the diameter of one or more of annular illuminators is between 80 ~ 140mm.
In one embodiment, one or more of annular illuminators can be controlled by way of mechanically or electrically moving
It is bright or go out.
In one embodiment, one or more of annular illuminators are in different height levels.
In one embodiment, the transmitting light of one or more of annular illuminators is shone directly on cornea.
In one embodiment, the transmitting light of one or more of annular illuminators is irradiated to after optical system
On cornea.
In one embodiment, the transmitting of one or more of annular illuminators just monochromatic light.
In one embodiment, the transmitting of one or more of annular illuminators just white light.
In one embodiment, the light source also includes tunable optical device, and the tunable optical device is configured to adjust
Size of one or more of annular illuminators in the projection picture of eye cornea.
In one embodiment, the direction of the transmitting light of one or more of annular illuminators is adjustable, so as to
Adjust size of one or more of annular illuminators in the projection picture of eye cornea.
In one embodiment, the light source also includes the ring for being arranged on one or more of annular illuminator peripheries
Shape speculum, for changing incident angle and the direction of one or more of annular illuminators.
Brief description of the drawings
Fig. 1 is the schematic diagram of the corneal astigmatism real-time positioning apparatus of prior art；
Fig. 2 is the schematic diagram of the lamp body of the corneal astigmatism real-time positioning apparatus of prior art；
Fig. 3 is the mathematics of projection picture and the schematic diagram of optical relation of light source, cornea and light source on cornea；
Fig. 4 a and 4b show one embodiment of the present utility model；
Fig. 5 a and 5b show one embodiment of the present utility model；
Fig. 6 a and 6b show one embodiment of the present utility model；
Fig. 7 a and 7b show one embodiment of the present utility model；And
Fig. 8 a and 8b show one embodiment of the present utility model.
Embodiment
Existing corneal astigmatism real-time positioning apparatus includes lamp body, and by entering to reflected image of the lamp body on cornea
Row ellipse fitting, the long axial direction of ellipse is marked, so as to indicate corneal astigmatism axial direction.As shown in figure 1, existing cornea dissipates
Light real-time positioning apparatus includes surgical operation microscope 1, camera device 2, image processing apparatus 3, display device 4 and lamp body 5.Shooting
Device 2 images to the image observed by surgical operation microscope 1, and output and the image processing apparatus 3 of the camera device 2 connect
Connect, so as to which photographic image is output in image processing apparatus 3.Lamp body 5 is arranged on the camera lens of surgical operation microscope 1.Such as Fig. 2 institutes
Show, lamp body 5 includes annular lamp holder 501 and power circuit 503, and the annular lamp holder 501 is provided with the light source 502 of annular.Annular
The axis of the camera lens of lamp socket 501 and surgical operation microscope 1 overlaps.Lamp body 5 is arranged on surgical operation microscope 1 using removably mode
On camera lens.
Camera device 2 is imaged to the image observed from surgical operation microscope 1, and image is delivered into image procossing
The unit to the reflected image progress ellipse fitting on cornea of annular light source 502 is provided with device 3, in image processing apparatus 3,
Image processing apparatus 3 marks the oval long axis direction being fitted and is delivered to display device after handling the image of input
4 are shown.Ellipse fitting unit can be realized by internal processes, can specifically be write using C Plus Plus,
Realized under the environment of Microsoft Visual Studio 2008.It is first after software obtains operation video frequency artwork by camera device 2
First pass through certain threshold value and image binaryzation, recycling Opencv are carried into searching profile function, filtered out by condition control
The reflection image of annular light source, and the point set in reflection image is stored in an array, the edge point data that will be got, with minimum
Square law can fit ellipse, and a line, as corneal astigmatism axial direction, and indicate operation are drawn in the long axial direction of ellipse
Incision site and intraocular lens's implantation position, and result is included in display device 4 such as on LCDs.
Wherein the spacing H of the size of lamp body light source 100, light source 100 and cornea 200, the radius of curvature of cornea 200（Or K
Value）, projection as 300 size between mathematics and optical relation be present, as shown in Figure 3.
In embodiment of the present utility model, the annular light source of corneal astigmatism real-time positioning apparatus is in actual clinic
State, eye cornea radius of curvature is about between 6.8 ~ 8.6mm, and the spacing of light source and cornea is about between 100 ~ 400mm, preferably
Ground is about between 100 ~ 300mm.
In some embodiments of the utility model, light source 100 can include an annular illuminator 101, the annulus
Shape illuminator 101 for example can be made up of the multiple LED for being arranged in annulus, as shown in figures 4 a and 4b.Operated in actual operation
Under environment, at least one transmitting light in one or more annular illuminators 101 of light source 100 is after cornea projects, energy
Enough acquisitions projection basically identical with the aperture used during pre-operative corneal radius of curvature measurement is as size, that is to say, that at least one
Projection picture of the individual annular illuminator 101 on cornea（That is corneal reflection picture, it is shaped as circular or ellipse）Diameter（When
When projection is as being circular）Or transverse size（When projection is as being oval）With being used during pre-operative corneal radius of curvature measurement
Aperture it is basically identical.In some embodiments of the utility model, project picture diameter or transverse size be 1.8 ~
3.5mm；Preferably 2.0 ~ 3.0mm；More preferably 2.0 ~ 2.8mm.Accordingly, the light source 100 of corneal astigmatism real-time positioning apparatus
A diameter of 65 ~ 215mm；Preferably 70 ~ 160mm；More preferably 80 ~ 140mm.Table 1 is shown according to of the present utility model one
The data of a little embodiments.
In one embodiment of the present utility model, as shown in figure 5 a and 5b, light source 100 can include more than one circle
Annular luminous body 101, such as two, three or more.These annular illuminators 101 are concentric and with different
Diameter, each annular illuminator 101 for example can be made up of the multiple LED for being arranged in annulus.At one of the present utility model
, can be by way of mechanically or electrically moving in embodiment（Such as the mode such as knob, switch, software）Different annulars is controlled to send out
Body of light 101 bright is gone out, and is selected for different surgical environments, to obtain more preferable surgical effect.In operation, one can be made first
Individual annular light, then observe the diameter or transverse size of projection picture of the annular illuminator on cornea
Whether suitable scope is in.If the diameter or transverse size of projection picture of the annular illuminator on cornea are in
Suitable scope, then continue the subsequent step of operation.If the diameter of projection picture of the annular illuminator on cornea
Or transverse size is not in suitable scope, then closes the annular illuminator and send out another annular illuminator
Light, it is until the diameter or transverse size of projection picture of some annular illuminator on cornea are in suitable scope
Only.
In one embodiment of the present utility model, include the situation of more than one annular illuminator 101 in light source 100
Under, the height of these annular illuminators 101 can be identical.In one embodiment of the present utility model, in light source 100
In the case of more than one annular illuminator 101, the height of these annular illuminators 101 can be it is different, such as
Shown in Fig. 6 a and Fig. 6 b.
In one embodiment of the present utility model, brightness adjusting unit is provided with lamp socket, it is adjustable using 3V, 300mA
Dc source is saved as working power, light-source brightness is adjusted by the adjustable optical circuit of LED special constant-currents.
In certain embodiments, tunable optical device can be increased near light source 100, such as speculum, lens or mirror
Group etc., the size of picture can be projected to adjust light source 100 in eye cornea by the tunable optical device.Such as Fig. 7 a and Fig. 7 b institutes
The one embodiment shown, in speculum 102 of the circle with predetermined slant of periphery installation one of light source 100, light source passes through speculum
After 102 reflections, one and the different size of aperture of original light source are formed, images in corneal plane.
In one embodiment, one or more light emission directions of of annular illuminator 101 of light source 100 itself are adjustable
, to adjust size of one or more annular illuminators 101 in the projection picture of eye cornea.Such as Fig. 8 a and Fig. 8 b institutes
Show, the luminous point battle array that one or more annular illuminators 101 can be adjusted light emission direction by a circle or multi-turn forms, and it is sent out
Light direction can be adjusted by devices such as machinery, electronics.In one embodiment, can be sent out in one or more annulars
The periphery installation Perimeter Truss Reflector 102 of body of light 101, change incident angle and the direction of one or more annular illuminators 101,
Reflected light of one or more annular illuminators 101 after the reflection of speculum 102 can be made to form various sizes of aperture, thrown
It is mapped to anterior corneal surface.In one embodiment, speculum 102 can be with putting down where one or more annular illuminators 101
Face is vertical.
In certain embodiments, the transmitting light of light source 100 can be shone directly on cornea.
In further embodiments, the transmitting light of light source 100 can be irradiated on cornea after optical system.The optics
System can include any optical element well known by persons skilled in the art.
In certain embodiments, the transmitting light of light source 100 can be monochromatic light or white light.In some embodiments
In, light source 100 can be made up of the LED of same wavelength, can also be made up of the LED of different wave length.
The some embodiments of the utility model of table 1
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 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, change are understood that from description above
And deformation.The utility model is not limited by the shown sequence of step because some steps can in a different order and/or
Carried out simultaneously with other steps.Therefore, the utility model is not limited to disclosed（It is one or more）Specific embodiment, but will
All embodiments being within the purview of the appended claims can be included.
Claims (16)
1. a kind of light source for corneal astigmatism real-time positioning apparatus, the light source is used to carry out ellipse in cornea upslide projection picture
It is fitted to determine corneal astigmatism shaft position, it is characterised in that the light source includes concentric one or more annular illuminators,
Under actual operation operating environment, at least one transmitting light in one or more annular illuminators of the light source is through angle
After film projection, the acquisition projection basically identical with the aperture used during pre-operative corneal radius of curvature measurement is as size.
2. light source according to claim 1, it is characterised in that at least one in one or more of annular illuminators
The diameter or transverse size of the individual projection picture on cornea are between 1.8 ~ 3.5mm.
3. light source according to claim 1, it is characterised in that at least one in one or more of annular illuminators
The diameter or transverse size of the individual projection picture on cornea are between 2.0 ~ 3.0mm.
4. light source according to claim 1, it is characterised in that at least one in one or more of annular illuminators
The diameter or transverse size of the individual projection picture on cornea are between 2.2 ~ 2.8mm.
5. according to the light source any one of claim 1-4, it is characterised in that one or more of annular illuminators
Diameter between 65 ~ 215mm.
6. according to the light source any one of claim 1-4, it is characterised in that one or more of annular illuminators
Diameter between 70 ~ 160mm.
7. according to the light source any one of claim 1-4, it is characterised in that one or more of annular illuminators
Diameter between 80 ~ 140mm.
8. according to the light source any one of claim 1-4, it is characterised in that being capable of the control by way of mechanically or electrically moving
Make the bright of one or more of annular illuminators or go out.
9. light source according to claim 8, it is characterised in that one or more of annular illuminators are different
Height level.
10. according to the light source any one of claim 1-4,9, it is characterised in that one or more of annular hairs
The transmitting light of body of light is shone directly on cornea.
11. according to the light source any one of claim 1-4,9, it is characterised in that one or more of annular hairs
The transmitting light of body of light is irradiated on cornea after optical system.
12. according to the light source any one of claim 1-4,9, it is characterised in that one or more of annular hairs
The transmitting of body of light just monochromatic light.
13. according to the light source any one of claim 1-4,9, it is characterised in that one or more of annular hairs
The transmitting of body of light just white light.
14. according to the light source any one of claim 1-4,9, it is characterised in that the light source also includes adjustable optical
Device, the tunable optical device be configured to adjust one or more of annular illuminators eye cornea projection as
Size.
15. according to the light source any one of claim 1-4,9, it is characterised in that one or more of annular hairs
The direction of the transmitting light of body of light is adjustable, to adjust projection of one or more of annular illuminators in eye cornea
The size of picture.
16. light source according to claim 15, it is characterised in that also include being arranged on one or more of annular hairs
The Perimeter Truss Reflector of body of light periphery, for changing incident angle and the direction of one or more of annular illuminators.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621067754.XU CN206659934U (en) | 2016-09-21 | 2016-09-21 | Light source for corneal astigmatism real-time positioning apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621067754.XU CN206659934U (en) | 2016-09-21 | 2016-09-21 | Light source for corneal astigmatism real-time positioning apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106344173A (en) * | 2016-09-21 | 2017-01-25 | 爱博诺德（北京）医疗科技有限公司 | Light source for corneal astigmatism real-time positioning device |
-
2016
- 2016-09-21 CN CN201621067754.XU patent/CN206659934U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106344173A (en) * | 2016-09-21 | 2017-01-25 | 爱博诺德（北京）医疗科技有限公司 | Light source for corneal astigmatism real-time positioning device |
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Address after: 102200 No. 9 Xingchang Road, Changping District Science and Technology Park, Beijing Patentee after: Abbott (Beijing) Medical Technology Co., Ltd. Address before: 102200, Changping District Beijing science and Technology Park, super Road, No. 37, building 1, 6 North Zone Patentee before: Eponode (Beijing) Medical Technology Co., Ltd. |
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