CN113749850B - Cornea astigmatism loosening aid - Google Patents
Cornea astigmatism loosening aid Download PDFInfo
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- CN113749850B CN113749850B CN202111174624.1A CN202111174624A CN113749850B CN 113749850 B CN113749850 B CN 113749850B CN 202111174624 A CN202111174624 A CN 202111174624A CN 113749850 B CN113749850 B CN 113749850B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
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- Ophthalmology & Optometry (AREA)
- Heart & Thoracic Surgery (AREA)
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Abstract
The invention provides a cornea astigmatism loosening auxiliary device, which comprises an outer fixed ring, an operating handle and a sliding knife groove assembly, wherein the upper surface of the outer fixed ring is provided with an axial position dial, the axial position dial comprises scale marks and angle scales, the middle part of the outer fixed ring is provided with an outer ring sliding groove, the outer ring side surface of the outer fixed ring is provided with a knife groove adjusting opening, the knife groove adjusting opening is communicated with the outer ring sliding groove, and an included angle is arranged between the lower surface of the outer fixed ring and a horizontal plane. The device's outer solid fixed ring lower surface is imitative eye sphere, makes the device can contact eyeball steadily, and the structural design of axial calibrated scale can pinpoint astigmatism axial and cornea incision initiating terminal, and the slip sword groove subassembly slidable can stabilize cornea incision radian and degree of depth, and the device can ensure incision rule, shape circle is right, and the degree of depth is fixed, ensures postoperative effect. The invention can be widely applied to cornea astigmatism loosening operation.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a cornea astigmatism loosening auxiliary device.
Background
Cataract is a blinding eye disease with highest incidence in the world, along with great progress of economic and technological development, cataract patients have higher and higher requirements on postoperative vision quality and naked eye vision, and not only clear vision in the whole process, but also lasting, comfortable and no-lens state. And preoperative corneal astigmatism is an important factor causing poor vision of cataract patients after surgery. The modern manipulation limbal loosening technique is quite economical, simple, convenient and feasible, has high safety, has good effect of correcting low-degree cornea astigmatism and is a surgical technique very suitable for popularization.
However, this procedure requires the assistance of a device for precisely marking the location of the corneal astigmatism and controlling the depth of the corneal incision. In the past, for cornea astigmatic axis marking, the traditional method is that when a patient sits before an operation, a doctor manually marks by using a marker under a slit-lamp microscope, when marking, firstly, adjusting the slit-lamp of the microscope to a horizontal position and modulating the slit-lamp to be narrowest, and the light band passes through the pupil center, so that the marker is used for marking the horizontal position on the limbus of the cornea. During operation, the marked 0 degree position is referenced, and the annular scattered light disk with scales is used for further determining the scattered light axis position. The method has high requirements on operators, poor repeatability and easy error occurrence. In view of the above, it is an urgent need in the art to stably and precisely control the position, shape, length and depth of an incision during limbal relief surgery.
Disclosure of Invention
Aiming at the technical problems that manual marking is high in requirement on operators, poor in repeatability and easy to cause errors in the traditional operation mode, the invention provides the cornea astigmatism loosening auxiliary device, wherein the lower surface of an outer fixing ring of the device is an eye-imitating sphere, so that the device can stably contact with an eyeball, the structural design of an axial dial can accurately position an astigmatism axial position and a cornea incision starting end, a sliding knife groove assembly can slide and can stabilize the radian and the depth of a cornea incision, the device can ensure regular incision, round shape and fixed depth, and the postoperative effect is ensured.
The cornea astigmatism loosening auxiliary device comprises an outer fixed ring, an operating handle and a sliding knife groove assembly, wherein an axial dial is arranged on the upper surface of the outer fixed ring, the axial dial comprises scale marks and angle scales, an outer ring sliding groove is arranged in the middle of the outer fixed ring, a knife groove adjusting opening is arranged on the outer ring side surface of the outer fixed ring and communicated with the outer ring sliding groove, and an included angle is formed between the lower surface of the outer fixed ring and a horizontal plane;
the sliding cutter groove assembly comprises a cutter groove fixing piece and a cutter groove sliding piece, wherein the cutter groove fixing piece is positioned in the outer ring sliding groove, the shape of the cutter groove fixing piece is matched with that of the outer ring sliding groove, the cutter groove fixing piece is in sliding connection with the outer ring sliding groove, the outer surfaces of the left end and the right end of the cutter groove fixing piece are respectively provided with a fixing groove, the front end of the fixing groove is provided with a sliding groove, the front end of the cutter groove fixing piece is provided with a cutter groove rear fixing surface, and an included angle is formed between the cutter groove rear fixing surface and a horizontal plane;
the upper surface of the knife slot sliding piece is provided with a cutter marking line, an included angle is formed between the lower surface of the knife slot sliding piece and the horizontal plane, the left end and the right end of the rear part of the knife slot sliding piece are respectively provided with a knife slot sliding strip, the knife slot sliding strips are in sliding connection with the sliding grooves, the inside of the fixed grooves is provided with adjusting screws, and the sliding positions of the knife slot sliding strips in the sliding grooves are adjusted through the adjusting screws;
the rear part of the cutter groove sliding piece is provided with a cutter groove front fixing surface, the cutter groove front fixing surface is parallel to the cutter groove rear fixing surface, the cutter groove front fixing surface, the cutter groove rear fixing surface and two cutter groove sliding strips form a cutter fixing groove, and the operating handle is fixedly connected with the outer ring side surface of the outer fixing ring.
Preferably, the outer fixing ring is in the shape of a circular ring or a semi-circular ring.
Preferably, the width of the axle position dial is 2+/-0.1 mm, and the diameter of the inner ring of the axle position dial is 11+/-0.5 mm.
Preferably, the lower surface of the outer fixing ring is in a conical shape, the included angle between the lower surface of the outer fixing ring and the horizontal plane is 30 degrees, the lower surface of the knife slot sliding piece is in a conical shape, and the included angle between the lower surface of the knife slot sliding piece and the horizontal plane is 30 degrees.
Preferably, the lower surface of the outer fixing ring is in a spherical shape, the included angle between the tangential direction of the lower surface of the outer fixing ring and the horizontal plane is 30 degrees, the lower surface of the knife slot sliding piece is in a spherical shape, the included angle between the tangential direction of the lower surface of the knife slot sliding piece and the horizontal plane is 30 degrees, and the lower surface of the outer fixing ring and the lower surface of the knife slot sliding piece are in a spherical shape.
Preferably, the included angle between the rear fixing surface of the cutter groove and the horizontal plane is 60 degrees.
Preferably, the width of the cutter fixing groove is 0.2 + -0.1 mm.
Preferably, the width of the cutter fixing groove is 0.2mm, the length of the upper end of the cutter fixing groove is 1.2mm, the length of the lower end of the cutter fixing groove is 0.7mm, and the exposed length of the cutting edge of the side cutter after the side cutter is inserted into the cutter fixing groove is 0.85mm.
Preferably, the outer ring sliding groove is in a T-shaped sliding groove, the width of the T-shaped sliding groove is 0.8+/-0.1 mm, the height of the T-shaped sliding groove is 3+/-0.2 mm, and the width of an opening of the T-shaped sliding groove is 1+/-0.1 mm.
Preferably, the material of the keratolytic aid is titanium alloy or stainless steel.
The invention has the advantages that the knife slot sliding piece is in sliding connection with the knife slot fixing piece through the knife slot sliding strip and the sliding groove, the sliding position of the knife slot sliding strip in the sliding groove can be adjusted through the adjusting screw, so that the width of the knife fixing groove can be adjusted, the exposed length of the cutting edge of the side knife placed in the knife fixing groove can be changed along with the width, and meanwhile, the sliding knife slot assembly can slide along the outer ring sliding groove of the outer fixing ring 1, and the side knife can finish limbus loosening operation through the sliding of the sliding knife slot assembly. The device can stably and accurately control the position, shape, length and depth of the incision during limbal loosening operation, ensure regular incision, round shape and fixed depth, and ensure postoperative effect.
The outer ring side surface of the outer fixing ring is provided with the cutter groove adjusting opening which is communicated with the outer ring sliding groove, so that the width of the cutter fixing groove can be conveniently adjusted, the exposed length of the cutting edge of the side cutter inserted into the cutter fixing groove can be conveniently adjusted, and the device can rapidly and accurately position different incision depths. Meanwhile, the design of the knife slot adjusting port facilitates the maintenance and the repair of the sliding knife slot group.
And because the included angle between the tangential direction of the lower surface of the outer fixing ring and the horizontal plane is 30 degrees, the included angle between the tangential direction of the lower surface of the knife slot sliding piece and the horizontal plane is 30 degrees, and the included angle between the knife slot rear fixing surface and the horizontal plane is 60 degrees, the device is better attached to the cornel limbus, and the side cutter is perpendicular to the cornea surface, so that the depth and the accuracy control of the operation are ensured.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the overall structure of the present invention with the operating handle removed;
FIG. 3 is a rear view of FIG. 2;
FIG. 4 is a top view of FIG. 2;
FIG. 5 is a cross-sectional view at A-A in FIG. 4;
FIG. 6 is a schematic overall construction of a sliding sipe assembly;
FIG. 7 is a schematic structural view of a sipe securing member;
FIG. 8 is a left side view of FIG. 7;
FIG. 9 is a schematic structural view of a sipe slider;
FIG. 10 is a schematic view of the overall structure of the sliding knife channel assembly after the side knives are placed;
FIG. 11 is a partial cross-sectional view of the present invention after placement into a side cutter;
fig. 12 is a schematic view of a semi-circular ring shape of the outer fixing ring.
The symbols in the drawings illustrate:
1. an outer fixing ring; 101. an axle position dial; 102. an outer ring sliding groove; 103. a knife slot adjusting port; 2. an operation handle; 3. a sliding knife slot assembly; 301. a knife slot fixing piece; 3011. a fixing groove; 3012. a sliding groove; 3013 a rear fixing surface of the cutter slot; 302. a knife slot slider; 3021. marking a line by a cutter; 3022. a knife slot sliding bar; 3023. a front fixing surface of the cutter groove; 303. a cutter fixing groove; 304. an adjusting screw; 4. and a side cutter.
Detailed Description
The invention is further described below with reference to examples.
Fig. 1-12 show an embodiment of the cornea astigmatism loosening aid of the present invention, which includes an outer fixing ring 1, an operation handle 2 and a sliding knife slot assembly 3, wherein the outer fixing ring 1 is in a ring shape or a semicircle ring shape, the ring shape is designed to facilitate the positioning and operation of various angles and positions, the semicircle ring shape is designed to form an observation window at a semicircle ring notch, the shielding can be avoided, the observation and positioning positions from the semicircle ring notch are facilitated, and the operation is more convenient and quick.
The upper surface of the outer fixed ring 1 is provided with an axle position dial 101, the axle position dial 101 comprises scale marks and angle scales, the width of the axle position dial 101 is 2+/-0.1 mm, the diameter of the inner ring of the axle position dial 101 is 11+/-0.5 mm, the middle part of the outer fixed ring 1 is provided with an outer ring sliding groove 102, the outer ring sliding groove 102 is in the shape of a T-shaped sliding groove, the width of the T-shaped sliding groove is 0.8+/-0.1 mm, the height of the T-shaped sliding groove is 3+/-0.2 mm, the width of the opening of the T-shaped sliding groove is 1+/-0.1 mm, the outer ring side surface of the outer fixed ring 1 is provided with a cutter groove adjusting opening 103, the cutter groove adjusting opening 103 is communicated with the outer ring sliding groove 102, the lower surface of the outer fixed ring 1 is in the shape of a spherical surface, the radius R of the spherical surface is 11+/-0.5 mmm, the included angle between the tangential direction of the lower surface of the outer fixed ring 1 and the horizontal plane is 30 degrees, the operating handle 2 is fixedly connected with the outer ring side surface of the outer fixed ring 1, and due to the structural design, the lower surface of the outer fixed ring 1 is an eye-imitating spherical surface, the device can be in closer contact with an eyeball, the positioning stability and the positioning accuracy are ensured, the structural design of the axial dial 101 can accurately position an astigmatic axial position and a cornea incision starting end, the axial dial 101 can be better attached to corneoscleral limbus, and the scales are prevented from being blocked.
As can be seen in the figure, the sliding knife slot assembly 3 includes a knife slot fixing member 301 and a knife slot sliding member 302, the knife slot fixing member 301 is located inside the T-shaped sliding slot of the outer ring sliding slot 102, the shape of the knife slot fixing member 301 is adapted to the T-shaped sliding slot of the outer ring sliding slot 102, the knife slot fixing member 301 is slidably connected with the outer ring sliding slot 102, and since the knife slot fixing member 301 can slide along the T-shaped sliding slot of the outer ring sliding slot 102, the stability of the operation can be stably ensured.
The outer surfaces of the left end and the right end of the cutter groove fixing piece 301 are respectively provided with a fixing groove 3011, the front end of the fixing groove 3011 is provided with a sliding groove 3012, the front end of the cutter groove fixing piece 301 is provided with a cutter groove rear fixing surface 3013, the included angle B between the cutter groove rear fixing surface 3013 and the horizontal plane is 60 degrees, the upper surface of the cutter groove sliding piece 302 is provided with a cutter marking line 3021, the cutter marking line 3021 is collinear with the scale line of the axis dial 101, the cutter marking line 3021 can conveniently position the starting position and the ending position of a cutter, the shape of the lower surface of the cutter groove sliding piece 302 is a spherical surface, the radius R of the spherical surface is 11+/-0.5 mmm, the included angle between the tangential direction of the lower surface of the cutter groove sliding piece 302 and the horizontal plane is 30 degrees, the lower surface of the cutter groove sliding piece 302 and the lower surface of the outer fixing ring 1 are concentric with each other, the device can be in closer contact with eyeballs, the stability and the accuracy of positioning are guaranteed, knife groove sliding strips 3022 are respectively arranged at the left end and the right end of the rear portion of the knife groove sliding piece 302, the knife groove sliding strips 3022 are in sliding connection with the sliding grooves 3012, adjusting screws 304 are arranged in the fixing grooves 3011, the sliding positions of the knife groove sliding strips 3022 in the sliding grooves 3012 are adjusted through the adjusting screws 304, knife groove front fixing surfaces 3023 are arranged at the rear portion of the knife groove sliding piece 302, the knife groove front fixing surfaces 3023 are parallel to the knife groove rear fixing surfaces 3013, knife groove front fixing surfaces 3023, knife groove rear fixing surfaces 3013 and the two knife groove sliding strips 3022 form a knife fixing groove 303, the width L of the knife fixing groove 303 is 0.2+/-0.1 mm, and the cornea astigmatism releasing aid is made of titanium alloy or stainless steel. In this structural design, the knife slot sliding member 302 is slidably connected with the knife slot fixing member 301 through the knife slot sliding bar 3022 and the sliding groove 3012, and the sliding position of the knife slot sliding bar 3022 in the sliding groove 3012 can be adjusted through the adjusting screw 304, so that the width of the knife fixing groove 303 can be adjusted, and the exposed length of the knife edge of the side knife 4 placed in the knife fixing groove 303 can be changed accordingly, and meanwhile, the sliding knife slot assembly 3 can slide along the outer ring sliding groove 102 of the outer fixing ring 1, and the side knife 4 can complete the limbal loosening operation through the sliding of the sliding knife slot assembly 3. In conclusion, the device can stably and accurately control the position, shape, length and depth of the incision in limbal loosening operation, ensure regular incision, round shape and fixed depth, and ensure postoperative effect.
In one embodiment, the width L of the cutter fixing groove 303 is 0.2mm, the length of the upper end of the cutter fixing groove 303 is 1.2mm, the length of the lower end of the cutter fixing groove 303 is 0.7mm,
the exposed length of the cutting edge of the side cutting knife 4 after being inserted into the cutting knife fixing groove 303 is 0.85mm, namely the depth of the incised cornea is 0.85mm, and the depth of the limbal incision can be suitable for most patients and can be widely popularized in limbal loosening operation.
In a specific embodiment, the lower surface of the outer fixing ring 1 is a conical surface, the angle a between the lower surface of the outer fixing ring 1 and the horizontal plane is 30 degrees, the shape of the lower surface of the sipe slider 302 is a conical surface, the angle C between the lower surface of the sipe slider 302 and the horizontal plane is 30 degrees, and the lower surface of the outer fixing ring 1 and the lower surface of the sipe slider 302 are spherical surfaces of the same sphere. The design ensures that the device can be tightly contacted with the eyeball, ensures the stability and the accuracy of positioning, and simultaneously has more convenient processing of the conical surface and low production cost.
And because the included angle B between the knife groove rear fixing surface 3013 and the horizontal plane is 60 degrees, the device is better attached to the cornel limbus, so that the side knife 4 is perpendicular to the cornea surface, and the depth and precision control of the operation are ensured.
And because the outer ring side surface of the outer fixing ring 1 is provided with the cutter groove adjusting opening 103, the cutter groove adjusting opening 103 is communicated with the outer ring sliding groove 102, the design can facilitate the adjustment of the width of the cutter fixing groove 303, and further facilitate the adjustment of the exposed length of the cutting edge of the side cutter 4 inserted into the cutter fixing groove 303, so that the device can more quickly and accurately position different incision depths. Meanwhile, the design of the cutter groove adjusting port 103 facilitates the maintenance and the repair of the sliding cutter groove group 3.
The invention provides a cornea astigmatism loosening auxiliary device, the lower surface of an external fixing ring of the device is an eye-simulating sphere, so that the device can be stably contacted with an eyeball, the structural design of an axial dial can accurately position an astigmatism axial position and a cornea incision starting end, a sliding knife groove component can slide and can stabilize the radian and depth of a cornea incision, and the device can ensure regular incision, round shape and fixed depth and ensure postoperative effect.
However, the foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention are intended to fall within the scope of the claims.
Claims (5)
1. A cornea astigmatism loosening auxiliary device, which is characterized in that: the outer fixed ring is provided with an outer ring sliding groove in the middle, the outer ring side surface of the outer fixed ring is provided with a knife groove adjusting port, the knife groove adjusting port is communicated with the outer ring sliding groove, and an included angle is formed between the lower surface of the outer fixed ring and a horizontal plane;
the sliding cutter groove assembly comprises a cutter groove fixing piece and a cutter groove sliding piece, wherein the cutter groove fixing piece is positioned in the outer ring sliding groove, the shape of the cutter groove fixing piece is matched with that of the outer ring sliding groove, the cutter groove fixing piece is in sliding connection with the outer ring sliding groove, the outer surfaces of the left end and the right end of the cutter groove fixing piece are respectively provided with a fixing groove, the front end of the fixing groove is provided with a cutter groove rear fixing surface, and an included angle is formed between the cutter groove rear fixing surface and a horizontal plane;
the upper surface of the knife slot sliding piece is provided with a cutter marking line, an included angle is formed between the lower surface of the knife slot sliding piece and the horizontal plane, the left end and the right end of the rear part of the knife slot sliding piece are respectively provided with a knife slot sliding strip, the knife slot sliding strips are in sliding connection with the sliding grooves, the inside of the fixed grooves is provided with adjusting screws, and the sliding positions of the knife slot sliding strips in the sliding grooves are adjusted through the adjusting screws;
the rear part of the cutter groove sliding piece is provided with a cutter groove front fixing surface which is parallel to the cutter groove rear fixing surface, the cutter groove front fixing surface, the cutter groove rear fixing surface and two cutter groove sliding strips form a cutter fixing groove, and the operating handle is fixedly connected with the outer ring side surface of the outer fixing ring;
the outer fixing ring is in a circular ring shape or a semicircular ring shape;
the lower surface of the outer fixing ring is in a spherical shape, the included angle between the tangential direction of the lower surface of the outer fixing ring and the horizontal plane is 30 degrees, the lower surface of the tool slot sliding piece is in a spherical shape, the included angle between the tangential direction of the lower surface of the tool slot sliding piece and the horizontal plane is 30 degrees, and the lower surface of the outer fixing ring and the lower surface of the tool slot sliding piece are in a spherical shape;
the width of the cutter fixing groove is 0.2+/-0.1 mm;
the width size of cutter fixed slot is 0.2mm, the upper end length of cutter fixed slot is 1.2mm, the lower extreme length of cutter fixed slot is 0.7mm, and the length of exposing of cutting edge is 0.85mm after the side cutter inserts the cutter fixed slot.
2. A corneal astigmatism debonding aid according to claim 1, wherein: the width of the axle position dial is 2+/-0.1 mm, and the diameter of the inner ring of the axle position dial is 11+/-0.5 mm.
3. A corneal astigmatism debonding aid according to claim 1, wherein: the included angle between the rear fixing surface of the cutter groove and the horizontal plane is 60 degrees.
4. A corneal astigmatism debonding aid according to claim 1, wherein: the shape of outer loop sliding tray is T shape sliding tray, the width of T shape sliding tray is 0.8 + -0.1 mm, the height of T shape sliding tray is 3 + -0.2 mm, the opening part width of T shape sliding tray is 1 + -0.1 mm.
5. A corneal astigmatism debonding aid according to any of claims 1 to 4 wherein: the cornea astigmatism loosening auxiliary device is made of titanium alloy or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111174624.1A CN113749850B (en) | 2021-10-09 | 2021-10-09 | Cornea astigmatism loosening aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111174624.1A CN113749850B (en) | 2021-10-09 | 2021-10-09 | Cornea astigmatism loosening aid |
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| Publication Number | Publication Date |
|---|---|
| CN113749850A CN113749850A (en) | 2021-12-07 |
| CN113749850B true CN113749850B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111174624.1A Active CN113749850B (en) | 2021-10-09 | 2021-10-09 | Cornea astigmatism loosening aid |
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| CN (1) | CN113749850B (en) |
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| US4205682A (en) * | 1976-09-17 | 1980-06-03 | The University Of Melbourne | Contact lens corneal cutter |
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| US5545172A (en) * | 1994-06-07 | 1996-08-13 | Malvern Technologies, Inc. | Rocking foot plate for surgical knife |
| US5595570A (en) * | 1994-12-06 | 1997-01-21 | S.C.M.D., Ltd. | Keratome with spring loaded adjustable plate, cutting length adjustment plate, method of cutting a corneal flap, and gauge-mounted bracket for adjusting plate on keratome head |
| GB201018984D0 (en) * | 2010-11-10 | 2010-12-22 | Central Manchester University Hospitals Nhs Foundation Trust | Toric axis marking tool |
| CN110801343A (en) * | 2019-11-12 | 2020-02-18 | 广东药科大学 | Corneal astigmatism correcting device |
| CN212165990U (en) * | 2020-04-01 | 2020-12-18 | 遂宁市中心医院 | Auxiliary tool and matched cutter for limbus loosening and incision |
| CN116531170A (en) * | 2023-05-23 | 2023-08-04 | 中国人民解放军陆军军医大学第一附属医院 | Cornea astigmatism positioning marking device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8231643B2 (en) * | 2008-05-13 | 2012-07-31 | Andrew Davis | Universal limbal relaxing incision guide |
| US9011470B2 (en) * | 2013-03-15 | 2015-04-21 | Richard Jonathan Mackool | Toric axis marker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4205682A (en) * | 1976-09-17 | 1980-06-03 | The University Of Melbourne | Contact lens corneal cutter |
| US4526171A (en) * | 1980-01-15 | 1985-07-02 | Schachar Ronald A | Cornea incision device |
| US5441511A (en) * | 1990-04-12 | 1995-08-15 | Hanna; Khalil | Keratotome for performing arcuate incisions |
| WO1995008955A1 (en) * | 1993-09-28 | 1995-04-06 | Feaster Fred T | Refractive surgery knife and process |
| US5545172A (en) * | 1994-06-07 | 1996-08-13 | Malvern Technologies, Inc. | Rocking foot plate for surgical knife |
| US5595570A (en) * | 1994-12-06 | 1997-01-21 | S.C.M.D., Ltd. | Keratome with spring loaded adjustable plate, cutting length adjustment plate, method of cutting a corneal flap, and gauge-mounted bracket for adjusting plate on keratome head |
| GB201018984D0 (en) * | 2010-11-10 | 2010-12-22 | Central Manchester University Hospitals Nhs Foundation Trust | Toric axis marking tool |
| CN110801343A (en) * | 2019-11-12 | 2020-02-18 | 广东药科大学 | Corneal astigmatism correcting device |
| CN212165990U (en) * | 2020-04-01 | 2020-12-18 | 遂宁市中心医院 | Auxiliary tool and matched cutter for limbus loosening and incision |
| CN116531170A (en) * | 2023-05-23 | 2023-08-04 | 中国人民解放军陆军军医大学第一附属医院 | Cornea astigmatism positioning marking device |
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| CN113749850A (en) | 2021-12-07 |
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