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Abstract
The ideal architecture of a LASIK flap includes several critical characteristics. The flap should be ultra-thin, preferably between 90 and 120 microns thick. This flap thickness positions the lamellar separation just below Bowman’s membrane. This results in the most minimal biomechanical impact on the cornea and provides the most possible tissue depth for laser ablation following flap creation, yet still allows the patient to benefit from the quick recovery traditionally associated with LASIK. The ideal flap should also be planar in architecture. These characteristics contribute to Sub-Bowman’s, or SBK, flaps. SBK LASIK flaps can be accurately achieved with either advanced mechanical microkeratomes, such as the Bausch and Lomb Zyoptix XP, or with femtosecond lasers such as the Intralase, Ziemmer LDV, Zeiss VisuMax, or Technolas Femtec lasers. This paper examines different techniques for safely and accurately achieving SBK flaps in LASIK surgery.
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Publication
Shapiro DR: SBK With The XP Microkeratome: An Evolutionary Step for Laser Refractive Surgery? Ophthalmology Management, December 2007, 11(12), p. 33-38.
Advanced Techniques: Created Sub-Bowman’s (SBK) Flaps Using the Bausch and Lomb Zyoptix XP