Surgical knife and method for performing radial keratotomy enhan

Details Surgical knife and method for performing radial keratotomy enhan Surgical knife and method for performing radial keratotomy enhan

1993-10-12

1994-08-09

Pellegrino, Stephen C.

Surgery

Instruments

Corneal cutter or guide for corneal cutter

606167, 30357, 128898, A61B 1732

Patent

active

053362365

ABSTRACT:
A surgical knife and a method for enhancing incisions in radial keratotomy enhancement surgery on an eye having a cornea and a central optical zone, where a generally radial incision previously made in the cornea has a wall adjacent the optical zone and is to be extended centripetally toward the optical zone. The knife comprises a knife blade with an end, and the blade has a sharpened cutting edge facing in a leading direction, a recess extending inwardly from the cutting edge and from the end of the blade, and a stopping edge and a measuring edge at the recess. The stopping edge faces in the leading direction. The measuring edge has a predetermined length and extends from the cutting edge to the stopping edge. The surgical knife is inserted into a previously made incision so that the cutting edge and the stopping edge face centripetally and the end of the blade contacts a bottom portion of the incision. The knife is advanced toward the optical zone, and the incision is extended a distance no greater than the predetermined length of the measuring edge. The surgical knife is then removed from the extended incision and the uneven bottom portion of the incision is evened out.

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patent: 5203865 (1993-04-01), Siepser
patent: 5222967 (1993-06-01), Casebeer et al.

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