GB2242835A - Surgical knife - Google Patents

Surgical knife Download PDF

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Publication number
GB2242835A
GB2242835A GB9021079A GB9021079A GB2242835A GB 2242835 A GB2242835 A GB 2242835A GB 9021079 A GB9021079 A GB 9021079A GB 9021079 A GB9021079 A GB 9021079A GB 2242835 A GB2242835 A GB 2242835A
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United Kingdom
Prior art keywords
base portion
knife
portion
surgical knife
surface
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Granted
Application number
GB9021079A
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GB9021079D0 (en
GB2242835B (en
Inventor
Ahmed Salih Mahmud
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Ahmed Salih Mahmud
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Priority to GB909009411A priority Critical patent/GB9009411D0/en
Application filed by Ahmed Salih Mahmud filed Critical Ahmed Salih Mahmud
Publication of GB9021079D0 publication Critical patent/GB9021079D0/en
Publication of GB2242835A publication Critical patent/GB2242835A/en
Application granted granted Critical
Publication of GB2242835B publication Critical patent/GB2242835B/en
Anticipated expiration legal-status Critical
Application status is Expired - Fee Related legal-status Critical

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F9/00Methods 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
    • A61F9/007Methods or devices for eye surgery
    • A61F9/013Instruments for compensation of ocular refraction ; Instruments for use in cornea removal, for reshaping or performing incisions in the cornea

Abstract

A surgical knife for use in cataract surgery to allow an artificial lens to be implanted in an eye has a base portion part-shaped to the curvature of the conjunctive region of an eye and part to the curvature of the cornea. The base region provides support and guidance for a blade movable relative to the base portion to form a cut in the limbal area. The base Portion has at least one vent hole in that part shaped to the curvature of the cornea thereby to assist free removal of the base portion from a part-cut cornea. <IMAGE>

Description

"SURGICAL KNIFE" This invention relates to a surgical knife and in particular to a surgical knife for use in eye surgery to treat a cataract condition.

The procedures involved in cataract surgery require that the cornea is cut in the region of the limbal line so as to facilitate access to the existing lens and for example to insert an implant lens.

Although with skill a surgeon can cut the cornea, this requires great care to avoid excessive damage to the delicate limbal region because any fine tremor of the surgeon's hand produces instability. Examination of the cut reveals invariably that it is not entirely smooth, regular or of even depth, and usually is serrated; the need to cut along a curved path at the correct angle contributes to this difficulty. The difficulty in achieving a smooth and regular cut of even depth leads to potential difficulties in ensuring a speedy healing of the wound, avoidance of scarring and of leakage of aqueous fluid. There is also the risk that stigmatism may occur.

The present invention seeks to provide an improved surgical knife and procedure for forming an incision in a cornea in which the aforedescribed difficulties are mitigated or overcome.

In accordance with one of its aspects the present invention provides a surgical knife comprising a base portion and a knife portion movable relative to the base portion, said base portion comprising a concave face for resting on the surface of the eye, retention means to facilitate retention of the base portion on the surface of an eye and guide means for guiding the knife portion to follow a non rectilinear path when the knife portion is moved relative to the base portion.

Preferably the curved face of the base portion comprises a conjunctiva (scleral) region which is shaped to conform to the curvature of a conjunctiva. Thus the curved face may be of an annular form and shaped and dimensioned to surround but not extend over a cornea.

More preferably, however, the curved face of the base portion additionally comprises a cornea region which is shaped to conform to and rest upon a cornea in use of the knife. Thus the base portion may comprise two surface regions each of concave curvature.

To facilitate subsequent removal from an eye preferably the concave surface of the base portion is provided with one or more small holes which extend through the base portion and prevent any significant vacuum effect arising when the base portion is lifted from the surface of an eye. If the base portion is of a kind which comprises a central, cornea region it is a particularly preferred that one or more small vent holes be provided in that region of the base portion.

The concave face of the conjunctiva (scleral) region may be provided with a textured, e.g. serrated surface or one or more discrete textured surface portions to assist in providing resistance to movement of the base portion over the surface of an eye when gently held against the eye.

The retention means may be in the form of a finger rest. It may comprise a pair of finger rests, typically shaped to accommodate a thumb and index finger, and middle finger respectively so that the base portion may be held gently against the surface of an eye and also be held against rotational or other movement relative to the eye surface. The or each finger rest may be in the form of an arm which extends outwards -in a direction away from the inner concave surface of the base portion.

The guide means preferably is provided on an outer surface of the base portion, being a surface opposite the inner, concave surface. The guide means may be of a circular form thereby to facilitate a rotational movement of the knife portion relative to the base portion. Alternatively it may comprise a non-rectilinear track formation which guides the knife portion. The guide means may be adapted to provide for a snap-fit or other form of retention of the knife portion against separation from the base portion, One or each of the knife and base portions may comprise non rigid material, e.g. a plastics material, to facilitate a snap-fit type of assembly of the two portions.

The base portion is to be provided with an opening through which a knife portion blade may extend. The opening may be that defined by the central opening of an annular type base portion, but if the base portion has a central, cornea region the opening may be in the form of a curved slot. Preferably the slot has a curvature which corresponds substantially with that of the limbal line of an eye. The slot preferably extends through an angle range of between 900 and 2700, an angle range of 1800 being suitable for undertaking many cataract procedures.

In the case of an opening in the form of a curved slot, the radially outer edge of the slot may correspond with the limbal line of the eye and the inner edge may be at a part of the base portion which conforms to the corneal curvature. Slot edges may be thickened to assist in guiding a knife.

The knife portion may comprise a body portion engagable with the guide means of the base portion at a surface thereof opposite the inner, concave surface. A blade associated with the knife portion may be arranged to extend or pass through the thickness of the base portion and to lie radially inwards of the inner, concave surface when in a operative position for making an incision.

The body portion may have a circular formation, e.g. at one end of a hollow cylindrical body portion, to co-operate with and be rotatable relative to a circular guide formation on a base portion.

The blade associated with the knife portion preferably is movable in a controlled manner in a substantially radial direction, i.e. a direction perpendicular to the inner, concave surface of the base portion. Depth stop means, which may be adjustable, may be provided to limit the extent to which the blade may lie inwards of the inner, concave surface and thereby limit the depth of incision in a cornea. Locking means may be provided to hold the blade in a desired position relative to the knife portion, or body thereof.The locking means may be operable to hold the blade in a retracted position, e.g. to prevent an incision being made whilst the base portion is fitted over an eye to lie centrally over the cornea and or lock the blade at a position inwards of the inner, concave surface so that a controlled depth of incision is achieved as the knife portion is moved relative to the base portion.

Preferably the blade is positioned so that it makes an incision in a plane substantially perpendicular to the surface of the eye.

Guide stops may be provided to limit the extent of relative movement of the base and knife portions. One of the portions may be provided with scale, e.g. angle markings to facilitate formation of an incision of predetermined or selected length. The knife portion may be provided with a depth scale to determine the position of the tip of the blade and or assist in positioning of one or more adjustable depth stops.

Preferably at least a substantial proportion of the surgical knife of the invention may be formed from a transparent material. The surgeon can then visually monitor the eye whilst making an incision. It is particularly preferred that a cornea region of the base portion be transparent together with regions of the knife portion that might otherwise obscure a view of the cornea region.

Particularly suitable materials for the knife, other than the cutting blade, include plastics materials. The material need not be of a kind able to withstand repeated sterilisation; the invention envisages that the knife is a disposable product intended to be used only once and then discarded.

The invention provides in accordance with another of its aspects a method of forming an incision in a cornea comprising providing a surgical knife of a kind in accordance with the present invention, ensuring that the blade of the knife portion lies radially outwards of the inner, concave surface of the knife base portion, positioning the knife base portion over the surface of an eye to lie centrally over the cornea, lowering the blade radially inwards to cause the blade to penetrate the cornea to a required depth and then moving the knife portion relative to the base portion to form an incision.

Preferably the blade is retracted to an inoperative position before the base portion is lifted from the eye surface.

Embodiments of a surgical knife in accordance with the present invention will now be described, by way of example only, with reference to the accompanying drawings in which: Figure 1 is a perspective view of the base portion of a knife in accordance with the present invention; Figure 2 is a plan view of the base portion of Figure 1; Figure 3 is a view of the underside of part of the base portion of Figure 2; Figure 4 is a vertical section on the line 4-4 of Figure 3; Figure 5 is a perspective view of a knife portion for the base portion of Figure 1; Figure 6 is a side view, part in section of a knife in accordance with a second embodiment; Figure 7 is a plan view of the knife of Figure 6; Figure 8 is a side view of a knife in accordance with a further embodiment; Figures 9 - 11 show component parts of the knife of Figure 8;; Figure 12 is a perspective view of a knife in accordance with a yet further embodiment, and Figure 13 is a vertical section on the line 13-13 of Figure 12.

A surgical knife for use in cataract surgery to make a curved incision in a cornea comprises a base portion 10 and a knife portion 11.

The base portion 10, see Figure 1 to 4, has an inner concave surface 12 for conforming to the surface of an eye. A central region 13 is for positioning over a cornea and an outer region 14 is for positioning over the surrounding conjunctiva (sclera).

The central region 13 is formed with a plurality of small holes 15 which ensure that a potentially damaging suction effect does not arise between the surface 12 and the cornea when the knife is removed. The outer region 14 of the surface 12 is formed with four uniformly circumferentially spaced regions 16 of a textured form, such as a serrated form, to resist any tendency for the base portion to slip over the surface of a conjunctiva. Similar holes 15' are provided in the conjunctiva region.

Two finger rests 17 of handle like form extend radially outwardly from the centre of the surface 14 and are diametrically opposed so as to be conveniently placed for receiving a surgeons thumb and index finger.

The base portion is provided with a semi-circular shaped slot 18 of uniform width as viewed in plan in Figure 2 so that a cutter blade may extend therethrough to lie with its end radially inwards of the concave surface 12. Angle and distance markings 19, 20 are provided adjacent the slot 18 so that a blade may be caused to move through a preselected angle or distance as described in more detail below. The slot 18 is positioned between the cornea and conjunctiva regions 13, 14 of the surface 12 so that a blade can be caused to cut a cornea without damage to the delicate limbal region of the eye between the cornea and conjunctiva.

The base portion is provided also with a pair of lip formations 21, 22 of part circular shape as viewed in plan in Figure 2 and diametrically opposed to lie substantially aligned with the finger rests 17. Each lip formation is of a substantially C-shape in vertical section as viewed in Figure 4 and is orientated so as to captively engage with an edge formation of the knife portion 11.

The knife portion 11, see Figure 5, comprises a body portion 23 of substantially cylindrical and hollow form and at a lower end 24 a concave end face 25. The end face 25 has a central part 26 which conforms to the shape of the outer convex surface of the cornea region of the base portion and an outer part 27 which conforms to the shape of part of the outer surface of the conjunctiva region of the base portion. The outer part 27 defines a retention lip 27' which can be snap-fitted into the lip formations 21, 22 of the base portion whereby the base and knife portions are held together but can be rotated relative to one another.

The body portion 23 is provided with one or more large holes 28 to ensure that the holes 15 in the base portion are vented to atmospheric pressure.

The body portion 23 additionally supports a cutter blade 29 the tip portion 30 of which is movable to extend outwards from the lower end face 25 to pass through the aforedescribed slot 18 in the base portion. An adjusting screw 31 and scale 32 carried by the body portion enable the position of the blade and thus depth of cut to be accurately controlled.

Although not-illustrated, the knife portion 11 may also be provided with limit stops to limit movement of the cutter blade. Similarly the base portion optionally may be provided with adjustable stops to limit relative rotation of the base and knife portions.

Preferably the end of the cutter blade is orientated so that when lowered to a position for forming an incision it lies substantially perpendicular to the radially inner, concave surface 12 of the base portion 11.

The cutter blade typically will be of a metallic material and not transparent. Preferably, however, a substantial part of the remainder of the knife is formed of a transparent material, such as a transparent plastics whereby the surgeon is able continually to observe the cornea whilst rotating the knife portion relative to the base portion to form in the cornea a curved incision.

A surgical knife 40 in accordance with a second embodiment is shown in Figure 6 and 7. This knife comprises a base portion 41 similar to the base portion 10 of Figures 1 to 4 except that the part-circular lip formations 21, 22 are replaced by an outer cylindrical body 42. A knife portion 43 is rotatably mounted within and guided by the outer cylindrical body 42. The outer body 42 has an upper end face 44 of a dished shape to act as a convenient rest for a surgeons index finger. This surface is provided with apertures 45 to ensure venting of holes 46 provided in the base portion.

An upper end region 47 of the outer body 42 supports control rings arranged to facilitate relative rotation of the base portion 41 and knife portion 43 and adjustment of the height of the cutter blade 48.

A modification of the embodiment of Figures 6 and 7 is shown in Figures 8 to 11. In this modification the outer body 42 is replaced by an outer body 50 having a semi-circular, circumferentially extending slot 51 between its axial ends. This slot is covered by a control ring 52 which has inwardly extending lugs 53 to engage a knife portion 54. Rotation of the ring 52 causes corresponding rotation of the knife portion 54 and associated cutter 55.

In the aforedescribed embodiments the end of the cutter blade is small such that it subtends a small angle of less than 100 about the major axis of the concave surface of the base portion. Thus make an incision which extends through an angle of, say, 1800 it is necessary to move the knife portion through at least 1700 relative to the base portion. The present invention envisages that alternatively use may be made of a larger knife, e.g. one which subtends an angle of 300 or even of more than 500; thus to form a cut which extends through 1800 the knife would not need to be rotated through more than 1500 or 1300.

The invention is not confined to constructions in which a knife portion is mounted to be rotatable relative to a base portion. It envisages that the knife portion may be of a form arranged for sliding relative to a base portion. An example of this form of embodiment is shown in Figures 12 and 13. A base portion 60 is shaped with a concave inner surface 61 for conforming to the convex surface of an eye, and the finger rests 17 are replaced by a central stem like handle 62. The base portion has a curved slot 63 for alignment close to the limbal line of an eye and the region of the slot furthest from the surface 61 is provided with a guide track 64 for a knife assembly comprised by a small cutter blade holder 65. The cutter blade holder has an adjuster wheel 66 associated therewith for depth of cut adjustment. An end portion 67 of the track is raised above the convex outer surface of the base portion to a greater extent than the remaining portion of the length of the track so that when at said end portion 67 the cutter blade 68 does not extend inwards of the concave inner surface 61. Thus with the blade at this end of the track, and preadjusted to give a desired depth of cut, the knife assembly may be carefully manoeuvred over the surface of an eye to lie in the required position without any risk of damage by the blade. The blade may then be slid along the track an appropriate distance to form an incision of the required length.

The invention envisages that the surgical knife may be manufactured in a range of sizes of concave inner surfaces thereby to fit a range of eye sizes. It envisages also that the knife may be of a disposable type such that it may be constructed of materials which are not necessarily suitable for subjecting to repeated sterilisation as would be required of a reusable knife.

It is believed that the present invention enables a surgeon to save time and to make an incision which is clean and has regular edges to assist healing and reduce the risk of scarring, stigmatism or leakage of aqueous fluids. The curvature of the incision is determined accurately by the knife, the depth is accurately controllable by the surgeon and any minor instability of the surgeon's hand will not lead to damage.

There is also the advantage that the use of a microscope becomes optional as opposed to usually being mandatory.

Additionally it is to be appreciated that the invention is simple for all practitioners to use.

Claims (18)

1. R surgical knife comprising a base portion an a knife portion movable relative to the base portion, said base portion comprising a concave face having a conjunctiva region and 2 cornea region for resting respectively on conjunctiva and cornea regions of an eye, at least one small vent hole arranged to extend through the base region, retention means to facilitate retention of the base portion on the surface of an eye and guide means of a circular form which facilitates rotational movement of the knife portion relative to the base portion. 2. 5 surgical knife comprising a base portion and a knife portion movable relative to the base portion; said base portion comprising a concave face for resting on the surface of an eye, retention means to facilitate retention of the base portion on the surface of an eye and guide means for guiding the knife portion to follow a non rectilinear path when the knife portion is moves relative to the base portion. 3. M surgical knife according to claim 2 wherein the concave face of the base portion comprises a conjunctive region shaped to conform to the curvature of a conjunctiva. 4. A surgical knife according to claim 3 wherein the concave face of the base portion comprises a cornea region shaped to conform to and rest upon a cornea. 5. m surgical knife according to any one of claims 2 to 4 wherein the concave surface of the base region is provided with at least one small hole arranged to extend through the base region and prevent any significant vacuum effect arising when the base portion is lifted from the surface of an eye. 6. A-surgical knife according to any one of claims 2 to 5 wherein the concave face of the base portion has a conjunctiva region provided with an at least partly texture surface to resist movement of the base portion over the surface of an eye. 7. a surgical knife according to any one of claims 2 to 5 wherein the 'guide means is vided on an outer surface of the base oortion. 6. 5 surgical knife according to any one of claims 2 to 7 wherein the guide means is of a circular form which facilitates C rotational movement of the knife portion relative to the base portion. 9. a surgical knife according to any one of the preceding claims wherein the guide means provides for retention of the knife portion against separation from the base portion. 10. Y surgical knife according to any one of the preceding claims wherein the base portion is provided with an opening through which the knife means extends. 11. A surgical knife according to claim 10 wherein the opening is defined by a curved slot of a curvature which corresponds substantially with that of the limbal line of an eye. 12. a surgical knife according to claim 11 wherein the slot extencs through an angle range of 90 degrees to 270 degrees. 13. n surgical knife according to any one of the preceding claims wherein the knife portion compris~ a body portion engagable with the guide means at a surface of the base portion opposite the inner, concave surface. 14. A surgical knife according to claim 13 wherein the knife portion comprises a blade arranged to extend or pass through the thickness of the base portion and lie radially inwards of the concave face when in an operative position. 15. A surgical knife according to claim 13 or claim 14 wherein the body portion has a circular formation to co-operate with and be rotatable relative to a circular guide formation on the base portion. 15. A surgical knife according to any one of claims 13 to 15 and comprising depth stop means to limit the extent to which a bla#e of the knife portion may lie radially inwards of said concave facs. 17, A surgical knife according to any one of the preceding claims an, comprising guide stows to limit the extent of relative move-..ent of the c--se and knife portions. 1. ' surgical knife according to any one of the preceding claims wherein a substantial proportion of the knife is fors from a transparent material. 19. e surgical knife according to any one of the preceding claims wherein the retention means comprises a pair of finger rests. 20. n surgical knife constructed and arranged substantially as herein before described with reference to the accompanying drains. 21. a method of forming an incision in a cornea comprising providing a surgical knife according to any one of the preceding claims, ensuring that the blade of the knife portion lies radially outwards of the inner, concave surface of the knife base portion, positioning the knife base ports over the surface of an eye to lie centrally over the cornea, lowering the blade-radially inwards to cause the blade to penetrate the cornea to the required depth and then moving the knife portion relative to the base portion to form an incision. 22. t method of forming an incision in 2 cornea substantially as herein before described with reference to the acconpanying drawings. AMENDMENTS TO THE CLAIMS HAVE BEEN FLED AS FOLLOWS.
1. A surgical knife for use in treating a cataract condition comprising a base portion and a knife portion movable relative to the base portion, said base portion comprising a concave face having a conjunctiva region and a cornea region for resting respectively on conjunctiva and cornea regions of an eye and shaped to conform substantially to the respective curvatures of said conjunctiva and cornea regions, at least one small vent hole arranged to extend through the cornea region, retention means to facilitate retention of the base portion on the surface of an eye and guide means for guiding the knife portion to follow a non rectilinear path in the limbal region when the knife portion is moved relative to the base portion.
2. A surgical knife according to claim 1 wherein a blade associated with the knife portion is movable in a controlled manner in a direction substantially perpendicular to said concave surface.
3. A surgical knife according to claim 1 or claim 2 wherein a blade associated with the knife portion is positioned so as to make an incision in a plane substantially perpendicular to the surface of an eye.
4. A surgical knife according to any one of the preceding claims wherein the the concave face of the base portion has a conjunctiva region provided with an at least partly textured surface to resist movement of the base portion over the surface of an eye.
5. A surgical knife according to any one of the preceding claims wherein the guide means is provided on an outer surface of the base portion.
6. A surgical knife according to any one of the preceding claims wherein the guide means is of a circular form which facilitates a rotational movement of the knife portion relative to the base portion.
7. A surgical knife according to any one of the preceding claims wherein the guide means provides for retention of the knife portion against separation from the base portion.
8. A surgical knife according to any one of the preceding claims wherein the base portion is provided with an opening through which the knife means extends.
9. A surgical knife according to claim B wherein the opening is defined by a curved slot of a curvature which corresponds substantially with that of the-limbal line of an eye.
10. d surgical knife according to claim 9 wherein the slot extends through an angle range of 90 degrees to 270 degrees.
11. A surgical knife according to any one of the preceding claims wherein the knife portion comprises a body portion engagable with the guide means at a surface of the base portion opposite the inner, concave surface.
12. A surgical knife according to claim 11 wherein the knife portion comprises a blade arranged to extend or pass through the thickness of the base portion and lie radially inwards of the concave face when in an operative position.
13. A surgical knife according to claim 11 or claim 12 wherein the body portion has a circular formation to co-operate with and be rotatable relative to a circular guide formation on the base portion.
14. A surgical knife according to any one of claims 11 to 13 and comprising depth stop means to limit the extent to which a blade of the knife portion may lie radially inwards of said concave face.
15. A surgical knife according to any one of the preceding claims and comprising guide stops to limit the extent of-relative movement of the base and knife portions.
16. A surgical knife according to any one of the preceding claims wherein a substantial proportion of the knife is formed from a transparent material.
17. A surgical knife according to any one of the preceding claims wherein the retention means comprises a pair of finger rests.
18. A surgical knife constructed and arranged substantially as herein before described with reference to the accompanying drawings.
GB9021079A 1990-04-26 1990-09-27 Surgical knife Expired - Fee Related GB2242835B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB909009411A GB9009411D0 (en) 1990-04-26 1990-04-26 Contact lens knife for cataract surgery

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GB9021079D0 GB9021079D0 (en) 1990-11-07
GB2242835A true GB2242835A (en) 1991-10-16
GB2242835B GB2242835B (en) 1993-12-08

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GB909009411A Pending GB9009411D0 (en) 1990-04-26 1990-04-26 Contact lens knife for cataract surgery
GB9021079A Expired - Fee Related GB2242835B (en) 1990-04-26 1990-09-27 Surgical knife

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GB909009411A Pending GB9009411D0 (en) 1990-04-26 1990-04-26 Contact lens knife for cataract surgery

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5226905A (en) * 1990-12-20 1993-07-13 Khalil Hanna Instrument for surgery of the cornea
US5250062A (en) * 1990-12-20 1993-10-05 Khalil Hanna Instrument for surgically correcting astigmatism
US5486188A (en) * 1993-11-15 1996-01-23 Smith; Alan D. Keratoscopic surgical instrument for making radial and arcuate corneal incisions
US5964776A (en) * 1997-09-24 1999-10-12 Peyman; Gholam A. Internal keratome apparatus and method for using the same to form a pocket/flap between layers of a live cornea
EP0990430A2 (en) * 1998-09-30 2000-04-05 Becton Dickinson and Company Corneal incision device
US6582445B1 (en) * 1998-03-11 2003-06-24 Visx, Incorporated Trephine for lamellar keratectomy
US6613061B1 (en) * 2000-09-08 2003-09-02 Randall J. Olson Device for transplanting a cornea on a patient's eye
US7744614B2 (en) 2005-06-15 2010-06-29 Krishna Imports, Incorporated Corneal excision or scoring device
US7780689B2 (en) 2003-04-07 2010-08-24 Technolas Perfect Vision Gmbh Bar-link drive system for a microkeratome
US8678593B2 (en) 2010-10-26 2014-03-25 Alcon Research, Ltd. Ophthalmoscopic contact lens
US20160278913A1 (en) * 2013-11-04 2016-09-29 Visioncare Ophthalmic Technologies Inc. Method and apparatus for preparation and insertion of an intraocular lens into the eye of a patient
US9603704B2 (en) 2013-03-13 2017-03-28 Acufocus, Inc. In situ adjustable optical mask

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Publication number Priority date Publication date Assignee Title
US9545303B2 (en) 2011-12-02 2017-01-17 Acufocus, Inc. Ocular mask having selective spectral transmission
US9427922B2 (en) 2013-03-14 2016-08-30 Acufocus, Inc. Process for manufacturing an intraocular lens with an embedded mask

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US4205682A (en) * 1976-09-17 1980-06-03 The University Of Melbourne Contact lens corneal cutter
EP0047190A2 (en) * 1980-09-03 1982-03-10 Laboratoire Hydron Surgical device for the accurate removal of the cornea
EP0248569A2 (en) * 1986-05-30 1987-12-09 Pfizer Hospital Products Group, Inc. Device for simultaneously forming two incisions along a path on an eye
WO1989000404A1 (en) * 1987-07-20 1989-01-26 The Cooper Companies, Inc. Corneal vacuum trephine system
US4807623A (en) * 1986-05-30 1989-02-28 David M. Lieberman Device for simultaneously forming two incisions along a path on an eye
US4815463A (en) * 1983-12-21 1989-03-28 Laboratoire Hydron Surgical apparatus for radial keratotomy

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4205682A (en) * 1976-09-17 1980-06-03 The University Of Melbourne Contact lens corneal cutter
EP0047190A2 (en) * 1980-09-03 1982-03-10 Laboratoire Hydron Surgical device for the accurate removal of the cornea
US4815463A (en) * 1983-12-21 1989-03-28 Laboratoire Hydron Surgical apparatus for radial keratotomy
EP0248569A2 (en) * 1986-05-30 1987-12-09 Pfizer Hospital Products Group, Inc. Device for simultaneously forming two incisions along a path on an eye
US4807623A (en) * 1986-05-30 1989-02-28 David M. Lieberman Device for simultaneously forming two incisions along a path on an eye
WO1989000404A1 (en) * 1987-07-20 1989-01-26 The Cooper Companies, Inc. Corneal vacuum trephine system

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5226905A (en) * 1990-12-20 1993-07-13 Khalil Hanna Instrument for surgery of the cornea
US5250062A (en) * 1990-12-20 1993-10-05 Khalil Hanna Instrument for surgically correcting astigmatism
US5486188A (en) * 1993-11-15 1996-01-23 Smith; Alan D. Keratoscopic surgical instrument for making radial and arcuate corneal incisions
US5964776A (en) * 1997-09-24 1999-10-12 Peyman; Gholam A. Internal keratome apparatus and method for using the same to form a pocket/flap between layers of a live cornea
US6582445B1 (en) * 1998-03-11 2003-06-24 Visx, Incorporated Trephine for lamellar keratectomy
EP0990430A2 (en) * 1998-09-30 2000-04-05 Becton Dickinson and Company Corneal incision device
EP0990430A3 (en) * 1998-09-30 2001-03-21 Becton Dickinson and Company Corneal incision device
US6613061B1 (en) * 2000-09-08 2003-09-02 Randall J. Olson Device for transplanting a cornea on a patient's eye
US7780689B2 (en) 2003-04-07 2010-08-24 Technolas Perfect Vision Gmbh Bar-link drive system for a microkeratome
US7744614B2 (en) 2005-06-15 2010-06-29 Krishna Imports, Incorporated Corneal excision or scoring device
US8678593B2 (en) 2010-10-26 2014-03-25 Alcon Research, Ltd. Ophthalmoscopic contact lens
US9603704B2 (en) 2013-03-13 2017-03-28 Acufocus, Inc. In situ adjustable optical mask
US20160278913A1 (en) * 2013-11-04 2016-09-29 Visioncare Ophthalmic Technologies Inc. Method and apparatus for preparation and insertion of an intraocular lens into the eye of a patient
US10201415B2 (en) * 2013-11-04 2019-02-12 Visioncare, Inc. Method and apparatus for preparation and insertion of an intraocular lens into the eye of a patient

Also Published As

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GB9021079D0 (en) 1990-11-07
GB9009411D0 (en) 1990-06-20
GB2242835B (en) 1993-12-08

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