Surgery – Instruments – Corneal cutter or guide for corneal cutter
Patent
1998-10-26
2000-03-14
Manuel, George
Surgery
Instruments
Corneal cutter or guide for corneal cutter
A61F 900
Patent
active
060367091
ABSTRACT:
An ophthalmic instrument and ophthalmic method for preventing epithelium cells from being deposited at the stroma interface during LASIK. The ophthalmic instrument has a base having a flat abutment face, two mutually concentric annular blades upstanding from the abutment face, and a cross-hair for sighting the position of the annular blades. The annular blades have a height of about 50 microns with respect to the abutment face, an inner annular blade thereof is from about 9 mm. to about 9.5 mm. in diameter, and an outer annular blade thereof is about 10.5 mm. in diameter. The ophthalmic method is performed prior to LASIK. The ophthalmic instrument is aligned over the cornea via the cross-hairs and then pressed upon the eye of a LASIK patient so that the annular blades cut into the cornea until the abutment face abuts the cornea and prevents further penetration. The depth of cut of the annular blades is such as to completely cut through the epithelium. The ophthalmic instrument is removed, leaving behind two mutually concentric annular cuts in the cornea, an epithelial ring being located therebetween. Next, an ophthalmic tool, such as for example a delicate forceps or tweezers is used to carefully grasp the epithelial ring and pull it free of the remainder of the cornea. As a result, an annular epithelial void is present on the cornea. Now, a surgeon may commence LASIK and when the flap cut is made, the blade cannot cut epithelium tissue on account of the epithelial void.
REFERENCES:
patent: 4763651 (1988-08-01), Kaufman et al.
patent: 5290301 (1994-03-01), Lieberman
Current Model of Hessburg-Barron Vacuum Trephine, Manufactured by Jedmed Instrument Co., St. Louis, Mo. 63129; Dated at Least Before Aug. 1998, Believed Much Earlier.
Old Model of Hessburg-Barron Vacuum Trephine with 2 Concentric Circular Blades. This Instrument has Been out of Manufacture for Years.
Boutros George J. E.
Jiraki Kalil M.
Keefe Peter D.
Manuel George
LandOfFree
Ophthalmic instrument and method for preparing an eye for LASIK does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ophthalmic instrument and method for preparing an eye for LASIK, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ophthalmic instrument and method for preparing an eye for LASIK will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-164705