Abstract: Surgical blades, knives and keratotomy procedures are provided which are capable of severing deep corneal tissue in the optical zone without penetrating the surface of this zone and causing optical glare. The blades of this invention include at least one cutting edge thereon which is shorter than about 0.5 mm and which includes a projecting cutting portion and/or recessed blunt edge to permit primary or secondary incisions beneath the surface of the optical zone.
October 20, 1993
Date of Patent:
December 27, 1994
William Ellis, Kerry K. Assil, William R. Knepshield, Kristen S. Fay