Articles: PDF OnlyRefractive keratotomy using a footplateless knifeNevyas-Wallace, Anita M.D.* Author Information *Reprint requests to Anita Nevyas-Wallace, M.D., 2 Bala Plaza, 333 City Avenue, Bala Cynwyd, Pennsylvania 19004. The author has a proprietary interest in the Nevyas-Wallace Quantum enhancement knife. Journal of Cataract & Refractive Surgery: May 1995 - Volume 21 - Issue 3 - p 254-256 doi: 10.1016/S0886-3350(13)80128-9 Buy Metrics Abstract This article describes a diamond knife designed for safer, more precise extension of pre-existing refractive keratotomy incisions. The knife has a blade with a sharp vertical cutting edge whose progress is limited by a dull safety stop. The stop prevents extension of a wound by more than 500 µm at one time, minimizing the possibility of overextending the keratotomy incision into the optical zone. Because it requires no footplate, the knife improves visibility, allowing for more precise surgery. © Williams & Wilkins 1995. All Rights Reserved.