Blade for intrastromal radial keratotomy

Details Blade for intrastromal radial keratotomy Blade for intrastromal radial keratotomy

1995-04-24

1997-09-02

Buiz, Michael

Surgery

Instruments

Corneal cutter or guide for corneal cutter

606107, A61F 900

Patent

active

056626681

ABSTRACT:
The horizontal base of an L-shaped blade is inserted within an existing incision performed as part of a traditional radial keratotomy procedure to permit an intrastromal cut to be made to urge corneal collapse and provide myopia correction without incurring glare and central vision distortion for the patient. The base of the blade extends approximately 1 mm to a very sharp vertical edge from the vertical arm attached to a blade holder to permit up to an equivalent length intrastromal cut until the end of the arm reaches the end of the preexisting incision through Bowman's membrane and the epithelium. The height of the base and length of the cutting edge is approximately 450 microns to prevent cutting or perforation of either of Bowman's or Descemet's membranes.

REFERENCES:
patent: 5203865 (1993-04-01), Siepser
patent: 5222967 (1993-06-01), Casebeer et al.
patent: 5224950 (1993-07-01), Prywes
patent: 5376099 (1994-12-01), Ellis et al.
Article entitled "What's New in Refractive Surgery Instruments", Review of Ophthalmology (A Chilton Publication), Jun. 1995, cover page, table of contents, editor's page, and pages 60-67 (total 9 pages).

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