CN218100510U - Teaching aid for fundus examination and laser treatment of eyes - Google Patents
Teaching aid for fundus examination and laser treatment of eyes Download PDFInfo
- Publication number
- CN218100510U CN218100510U CN202221175289.7U CN202221175289U CN218100510U CN 218100510 U CN218100510 U CN 218100510U CN 202221175289 U CN202221175289 U CN 202221175289U CN 218100510 U CN218100510 U CN 218100510U
- Authority
- CN
- China
- Prior art keywords
- simulated
- fundus
- teaching aid
- interstitial
- axis
- 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
Images
Landscapes
- Eye Examination Apparatus (AREA)
Abstract
The utility model discloses a teaching aid for eye ground inspection and laser therapy eye belongs to medical teaching aid technical field to solve the teaching mode of present clinical mesopelma laser usually for theoretical knowledge biography and clinical practice, lack the problem of effectual simulation teaching device. The utility model discloses a teaching aid for eye ground inspection and laser therapy eye, include: simulating an ocular fundus component; a simulated retina disposed on the simulated fundus component; the adjusting component is rotatably arranged on the simulated fundus component and is provided with a plurality of simulated refraction interstitial sight films and a plurality of lenses; any one of the plurality of simulated refractive interstitial vision discs and any one of the plurality of lenses may be rotated to a side opposite the simulated retina when the adjustment assembly is rotated. The utility model discloses a plurality of simulation refraction interstitial vision pieces and a plurality of camera lenses on the adjusting part can switch, can simulate the eye ground inspection and the laser therapy under the different diseases, from easy to difficult, are applicable to different degree learner's teaching and training.
Description
Technical Field
The utility model relates to a medical science teaching aid, concretely relates to a teaching aid for eye ground inspection and laser treatment eye.
Background
Fundus examination is one of the basic skills of ophthalmologists, and fundus laser is an important method for treating various retinal diseases, and plays an extremely important role in clinical practice. Laser photocoagulation is to destroy retina in ischemia state by thermal coagulation effect, reduce oxygen consumption of retina, improve blood supply of retina at other parts, destroy abnormal blood vessel in pathological change area, reduce leakage, stimulate aseptic inflammation of retinal nerve epithelium and pigment epithelium, make it generate adhesion and scar, prevent retinal detachment, etc. The clinical ocular fundus laser has wide adaptation, including retinal hole, retinal degeneration, diabetic retinopathy, retinal vein obstruction, macular edema and the like.
Fundus laser photocoagulation is a necessary technology for fundus doctors, is a necessary way for young doctors to grow, and also needs a certain learning curve. At present, the teaching mode of fundus laser in clinic is generally theoretical knowledge teaching and clinical practice, and an effective simulation teaching device is lacked.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the teaching mode of the fundus laser in clinical at least and lack the problem of effectual simulation teaching device for theoretical knowledge teaching and clinical practice usually. The purpose is realized by the following technical scheme:
the utility model discloses a first aspect provides a teaching aid for eye ground inspection and laser treatment eye, include:
simulating an ocular fundus component;
a simulated retina disposed on the simulated fundus component;
the adjusting component is rotatably arranged on the simulated fundus component and is provided with a plurality of simulated refraction interstitial vision films and a plurality of lenses; when the adjusting component rotates, any one of the plurality of simulated dioptric interstitial vision pieces and any one of the plurality of lenses can rotate to the side opposite to the simulated retina.
According to the utility model discloses a teaching aid of laser therapy eye, a plurality of simulation refraction interstitial vision piece and a plurality of camera lenses on the adjusting part can switch, can simulate the eye ground inspection and the laser therapy under the different diseases, from easy to difficult, be applicable to different degree learners 'teaching and training, can leave the vestige after the simulation retina is hit by the laser, can evaluate after taking out, thereby realize the standardized simulation teaching of eye ground laser, still can simulate different retinopathy simultaneously and supply learner discernment and laser therapy, from easy to difficult, be applicable to different degree learners's teaching and training.
In addition, according to the utility model discloses a teaching aid for eye ground inspection and laser treatment eye still can have following additional technical characterstic:
in some embodiments of the present invention, the adjusting assembly comprises a viewing assembly stand and a lens assembly stand; the visual piece assembling frame is rotatably arranged on the simulated fundus component around a first axis, a plurality of mounting holes are formed in the visual piece assembling frame at intervals along the circumferential direction of the first axis, and each mounting hole is provided with a simulated refraction interstitial visual piece; the lens assembly frame is rotatably arranged on the simulated fundus component around a second axis, a plurality of simulated pupils are arranged on the lens assembly frame at intervals along the circumferential direction of the second axis, and each simulated pupil is provided with the lens;
when the viewing plate assembly frame and the lens assembly frame rotate, any one of the plurality of simulated refraction interstitial viewing plates and any one of the plurality of lenses can move to the side opposite to the simulated retina.
In some embodiments of the present invention, the simulated fundus component comprises a simulated fundus and an eyeball housing; the simulated fundus is fixedly arranged in the eyeball shell, the visual film assembling frame is rotatably arranged in the eyeball shell around a first axis, and the lens assembling frame is rotatably arranged on the eyeball shell around a second axis.
In some embodiments of the invention, the first axis and the second axis are axisymmetric with respect to the simulated retinal axis, or the first axis and the second axis are perpendicular.
In some embodiments of the present invention, the eyeball housing and the lens assembly frame are buckled together to form a sphere.
In some embodiments of the present invention, the viewing assembly and/or the lens assembly can be detachably connected to the simulated fundus, and the simulated retina can be detachably connected to the simulated fundus.
In some embodiments of the present invention, the diameter of the pupil is different.
In some embodiments of the present invention, a plurality of the simulated refractive interstitial vision discs are lenses of different opacities.
In some embodiments of the present invention, the adjusting assembly includes a bracket rotatably disposed on the simulated fundus, the bracket is provided with a plurality of simulated pupils at intervals along a circumferential direction of a rotation axis of the simulated fundus, and each of the simulated pupils is provided with the lens and the simulated refractive interstitial vision film from outside to inside;
when the support rotates on the simulated eye bottom, any one of the simulated pupils can move to the side opposite to the simulated retina.
In some embodiments of the present invention, the simulated fundus is formed with a concave spherical surface on which the simulated retina is disposed.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
FIG. 1 schematically illustrates an overall structural view of a first embodiment of the teaching aid for fundus examination and laser treatment of the eye of the present invention;
FIG. 2 is a partial view of FIG. 1 (without the lens housing);
FIG. 3 schematically illustrates an overall structural view of a second embodiment of the teaching aid for fundus examination and laser treatment of the eye of the present invention;
fig. 4 schematically shows an overall structural view of a third embodiment of the teaching aid for fundus examination and laser treatment of the eye of the present invention.
The reference numbers are as follows:
10. simulating an ocular fundus component; 11. simulating the fundus; 12. an outer eyeball shell; 20. an adjustment assembly; 21. a viewing sheet assembly frame; 21a, simulating a refraction interstitial vision film; 21b, a protrusion; 22. a lens assembling frame; 22a, a lens; 23. a support; 24. a first rotating shaft; 25. a second rotating shaft; 30. simulating a retina; p1, a first axis; p2, second axis; p3, axis of the simulated retina.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. This spatially relative term is intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "at 8230; \8230; below" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
According to an embodiment of the present invention, a teaching aid for fundus examination and laser treatment of the eye is provided, as can be seen in fig. 1-4, comprising a simulated fundus component 10, a simulated retina 30 and an adjustment component 20; wherein, the simulated retina 30 is arranged on the simulated fundus component 10, and can be fixed on the simulated fundus component 10 in a detachable mode; the adjusting component 20 is rotatably arranged on the simulated fundus component 10, and the adjusting component 20 is provided with a plurality of simulated refraction interstitial vision films 21a and a plurality of lenses 22a; when the adjustment assembly 20 is rotated, any one of the plurality of simulated refractive interstitial vision discs 21a and any one of the plurality of lenses 22a may be rotated to a side opposite to the simulated retina 30.
In some embodiments of the present invention, as shown in fig. 1-3, the adjusting assembly 20 may include a viewing lens assembly frame 21 and a lens assembly frame 22; the visual piece assembling frame 21 is rotatably arranged on the simulated fundus component 10 around a first axis P1, a plurality of mounting holes are formed in the visual piece assembling frame 21 at intervals along the circumferential direction of the first axis P1, and each mounting hole is provided with a simulated refraction interstitial visual piece 21a; the lens assembly frame 22 is rotatably arranged on the simulated fundus component 10 around a second axis P2, the lens assembly frame 22 is provided with a plurality of simulated pupils at intervals along the circumferential direction of the second axis P2, and each simulated pupil is provided with a lens 22a; when the viewing frame 21 and the lens assembly frame 22 are rotated, any one of the plurality of simulated dioptric interstitial viewing discs 21a and any one of the plurality of lenses 22a can be moved to the side opposite to the simulated retina 30.
The view assembly frame 21 and the lens assembly frame 22 may be of a bowl-shaped structure, a part of the view assembly frame 21 is located in the lens assembly frame 22, when the view assembly frame 21 and the lens assembly frame 22 rotate, one of the simulated pupils and one of the simulated dioptric interstitial views 21a are arranged opposite to each other, and the simulated dioptric interstitial views 21a opposite to the lenses and the simulated retina 30 are arranged opposite to each other, so that when laser passes through the lens 22a for simulating pupils, the laser irradiates the simulated retina 30 through the simulated dioptric interstitial views 21a to form traces, and the laser irradiates eye diseases for simulating different symptoms by matching different combinations of the plurality of simulated dioptric interstitial views 21a and the plurality of lenses 22a, so as to facilitate understanding of the influence of laser irradiation on the retina under different symptoms, facilitate understanding of the influence of laser irradiation in an actual operation process, and avoid risks caused by inexperienced direct operation on a patient.
The following exemplifies how the viewing-sheet assembly frame 21 and the lens assembly frame 22 are implemented to rotate on the simulated fundus component 10.
In some embodiments, as shown in fig. 1 and 2, the simulated fundus component 10 may include a simulated fundus 11 and an eye shell 12; the simulated fundus 11 is fixedly arranged in the eyeball shell 12, the visual piece assembling frame 21 is rotatably arranged in the eyeball shell 12 around a first axis P1, for example, a rotating shaft hole can be arranged on the eyeball shell 12, a bulge 21b is formed on the visual piece assembling frame 21, the bulge 21b is arranged in the rotating shaft hole, and the axis of the rotating shaft hole can be used as the first axis P1; the lens mount 22 is rotatably provided on the eyeball housing 12 about a second axis P2, and for example, a rotary shaft (not shown) having an axis as the second axis P2 is provided on the simulated eye fundus 11, and the lens mount 22 is rotatably connected to the rotary shaft. Also can be that lens equipment frame 22 rotates through the mode of joint with eyeball shell 12, sets up ring groove in the opening circumference of eyeball shell 12 promptly, sets up on lens equipment frame 22 with ring groove to the joint protruding, the protruding card of joint is gone into in the ring groove. It is to be understood that the fixation of the simulated fundus 11 in the present embodiment in the outer eyeball shell 12 may be a structure in which the simulated fundus 11 is integrally formed with the outer eyeball shell 12 or the simulated fundus 11 may be detachably fixed in the outer eyeball shell 12.
In order to make the eye teaching aid more vivid, the eyeball housing 12 and the lens assembly frame 22 are buckled together to form a sphere, and the outer surface of the lens assembly frame 22 may be a spherical structure.
Preferably, the first axis P1 and the second axis P2 are axisymmetrically arranged with respect to the axis P3 of the simulated retina 30, so that 360-degree rotation of the viewing lens assembly frame 21 and the lens assembly frame 22 can be realized, more simulated refractive interstitial viewing lenses 21a can be arranged on the viewing lens assembly frame 21, more lenses 22a can be arranged on the lens assembly frame 22, eye diseases with more symptoms can be simulated, and traces generated by laser irradiation on the simulated retina 30 under different symptoms can be simulated, so as to facilitate understanding of laser irradiation parameters under different conditions of the needle. Of course, the first axis P1 and the second axis P2 may be vertical, as shown in fig. 3, in this case, the view slice assembling frame 21 may be rotatably disposed on the simulated fundus 11 through the first rotating shaft 24, the axis of the first rotating shaft 24 is used as the first axis P1, the lens assembling frame 22 may be rotatably disposed on the simulated fundus 11 through the second rotating shaft 25, the axis of the second rotating shaft 25 is used as the second axis P2, the first rotating shaft 24 and the second rotating shaft 25 may intersect with the axis P3 of the simulated retina 30, the view slice assembling frame 21 and the lens assembling frame 22 may be disposed on opposite sides of the simulated retina 30, compared with the structure in which the first axis P1 and the second axis P2 are axisymmetrically disposed with respect to the axis P3 of the simulated retina 30, the view slice assembling frame 21 and the lens assembling frame 22 may only rotate at a certain angle, and may not rotate at 360 °, that a larger number of simulated dioptric view slices 21a cannot be disposed on the view slice assembling frame 21, and a smaller number of simulated lens groups 22a cannot be disposed on the interstitial assembling frame 22, thereby achieving a smaller number of simulated dioptric vision slices than the conventional teaching function.
The adjusting assembly 20 can be realized by other structures besides that any one of the plurality of simulated refractive interstitial vision pieces 21a and any one of the plurality of lenses 22a can be moved to the side opposite to the simulated retina 30 in the above-mentioned enumerated manner, and specifically, as shown in fig. 4, in some embodiments of the present invention, the adjusting assembly 20 can include a bracket 23, the bracket 23 can be rotatably disposed on the simulated fundus 11, the bracket 23 is provided with a plurality of simulated pupils at intervals along the circumferential direction of the rotation axis of the simulated fundus 11, that is, the bracket 23 is provided with a plurality of simulated pupils at intervals along the circumferential direction of the rotation axis P4, and each simulated pupil is sequentially provided with the lens 22a and the simulated refractive interstitial vision pieces 21a from outside to inside; when the support 23 is rotated on the simulated fundus 11, any one of the simulated pupils can be moved to the side opposite to the simulated retina 30. Compared with the implementation mode, the structure is simple, but only one group of simulated refraction interstitial vision films 21a and lenses 22a is arranged in each pupil, the combination mode is single, the symptoms of eye diseases can be simulated, and the function of simulated teaching is basically realized.
In some embodiments, the plurality of simulated dioptric interstitial vision tablets 21a can be lenses with different turbidities, and are combined with different lenses 22a, and laser irradiates through the lenses 22a and the simulated dioptric interstitial vision tablets 21a in sequence and converges to spots with different traces on the simulated retina, so that a student can know the change of the retina when the laser is used for treatment under different pathological conditions.
In some embodiments, the diameters of the multiple pupils are of different sizes, and lenses 22a of different diameters may be embedded.
In some embodiments, the viewing lens assembly frame 21 and/or the lens assembly frame 22 are removably coupled to the simulated fundus 11, and the simulated retina 30 is removably coupled to the simulated fundus 11, facilitating viewing and replacement of the simulated retina 30.
In some embodiments, the surface of the light incident side of each lens 22a is a smooth convex surface, the surface of the light emergent side of each lens 22a is a smooth concave surface, the curvatures of the convex surfaces of the plurality of lenses 22a can be different or the same, and the lenses can be reasonably matched according to the diameters of different pupils and combined with the simulated refractive interstitial vision films 21a with different turbidities to simulate eye diseases with different symptoms.
In some embodiments, the simulated fundus 11 is formed with a concave spherical surface on which the simulated retina 30 is disposed.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A teaching aid for fundus examination and laser treatment of the eye, comprising:
simulating an ocular fundus component;
a simulated retina disposed on the simulated fundus component;
the adjusting component is rotatably arranged on the simulated fundus component and is provided with a plurality of simulated refraction interstitial vision films and a plurality of lenses; when the adjusting component rotates, any one of the plurality of simulated dioptric interstitial vision plates and any one of the plurality of lenses can rotate to the side opposite to the simulated retina.
2. A teaching aid as claimed in claim 1, wherein the adjustment assembly comprises a viewing assembly mount and a lens assembly mount; the visual piece assembling frame is rotatably arranged on the simulated fundus component around a first axis, a plurality of mounting holes are formed in the visual piece assembling frame at intervals along the circumferential direction of the first axis, and each mounting hole is provided with a simulated refraction interstitial visual piece; the lens assembling frame is rotatably arranged on the simulated fundus component around a second axis, a plurality of simulated pupils are arranged on the lens assembling frame at intervals along the circumferential direction of the second axis, and each simulated pupil is provided with the lens;
when the viewing-piece assembling frame and the lens assembling frame rotate, any one of the plurality of simulated refraction interstitial viewing pieces and any one of the plurality of lenses can move to the side opposite to the simulated retina.
3. A teaching aid as claimed in claim 2 wherein the simulated fundus component comprises a simulated fundus and an outer globe shell; the simulated fundus is fixedly arranged in the eyeball shell, the visual film assembling frame is rotatably arranged in the eyeball shell around a first axis, and the lens assembling frame is rotatably arranged on the eyeball shell around a second axis.
4. A teaching aid as claimed in claim 2 or 3, wherein the first and second axes are axisymmetric with respect to the axis of the simulated retina or the first and second axes are perpendicular.
5. A teaching aid as claimed in claim 3, wherein the eye ball housing and the lens assembly frame snap together to form a sphere.
6. A teaching aid as claimed in claim 2, wherein the viewing slice assembly mount and/or the lens assembly mount are removably attachable to the simulated eye fundus, and the simulated retina is removably attachable to the simulated eye fundus.
7. A teaching aid as claimed in claim 2, wherein the pupils are of different diameters.
8. A teaching aid as claimed in claim 2, wherein a plurality of the simulated dioptric interstitial vision discs are lenses of different turbidity.
9. A teaching aid as claimed in claim 1, 7 or 8, wherein the adjustment assembly comprises a bracket rotatably disposed on the simulated fundus, the bracket having a plurality of simulated pupils spaced circumferentially along the axis of rotation of the simulated fundus, each simulated pupil having the lens and the simulated refractive interstitial viewing plate disposed sequentially from outside to inside;
when the bracket rotates on the simulated eye bottom, any one simulated pupil can move to the side opposite to the simulated retina.
10. A teaching aid as claimed in any of claims 1 to 3, wherein the simulated fundus is formed with a concave spherical surface on which the simulated retina is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221175289.7U CN218100510U (en) | 2022-05-16 | 2022-05-16 | Teaching aid for fundus examination and laser treatment of eyes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221175289.7U CN218100510U (en) | 2022-05-16 | 2022-05-16 | Teaching aid for fundus examination and laser treatment of eyes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218100510U true CN218100510U (en) | 2022-12-20 |
Family
ID=84458496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221175289.7U Active CN218100510U (en) | 2022-05-16 | 2022-05-16 | Teaching aid for fundus examination and laser treatment of eyes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218100510U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114937405A (en) * | 2022-05-16 | 2022-08-23 | 苏州君信视达医疗科技有限公司 | Teaching aid for fundus examination and laser treatment of eyes |
-
2022
- 2022-05-16 CN CN202221175289.7U patent/CN218100510U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114937405A (en) * | 2022-05-16 | 2022-08-23 | 苏州君信视达医疗科技有限公司 | Teaching aid for fundus examination and laser treatment of eyes |
| CN114937405B (en) * | 2022-05-16 | 2024-05-17 | 苏州君信视达医疗科技有限公司 | Teaching aid for fundus examination and laser treatment of eyes |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2019200257B2 (en) | Ophthalmic lens with an optically non-coaxial zone for myopia control | |
| Michel et al. | Retinal detachment | |
| Neil Charman et al. | Peripheral refraction and the development of refractive error: a review | |
| US5777717A (en) | Method for simulation of visual disabilities | |
| CN218100510U (en) | Teaching aid for fundus examination and laser treatment of eyes | |
| CN102920532B (en) | Artificial cornea | |
| Vincent | The use of contact lenses in low vision rehabilitation: optical and therapeutic applications | |
| CN112055556A (en) | Ophthalmic device | |
| CN114530082B (en) | Ophthalmologic simulation teaching device and method | |
| CN204890521U (en) | Eyes trainer | |
| CN104382729A (en) | Vision correction training system and method | |
| Vyas et al. | Early astigmatism can alter myopia development in chickens | |
| CN201681529U (en) | Ametropia presentation device for seeing from long or short distance | |
| CN114937405B (en) | Teaching aid for fundus examination and laser treatment of eyes | |
| CN216671002U (en) | Ophthalmology simulation teaching equipment | |
| US20210191155A1 (en) | Ophthalmic lens with an optically non-coaxial zone for myopia control | |
| CN211628539U (en) | Detachable ophthalmic corneal foreign body removing model | |
| CN101502457A (en) | Animal corneal contact lens for observing ocular fundus and assisting operation under microscope | |
| US7354151B2 (en) | Ring laser photocoagulation | |
| Timberlake et al. | The direct ophthalmoscope how it works and how to use it | |
| Altobelli | ElectroOculoGraphy (EOG) Eye-Tracking for Virtual Reality | |
| CN102755240A (en) | Device for treating astigmatism and strabismus | |
| CN213070315U (en) | Eyeball simulator for assisting ophthalmologist in practicing front mirror and three-mirror | |
| Lebensohn | The pinhole test | |
| CN214279389U (en) | Eyeground inspection eyeball model |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |