Surgical blades  

Calibrated Lasik blade offers unatch accuracy to help maximize the performance of your microkeratome The most critical dimension of the Lasik blade is from the front surface of the plastic Blade Holder to the cutting edge of the Blade.

This dimension is directly related to the depth of cut and is commonly referred to as the Blade Pitch  Many of the traditional Lasik Blades vary by much as +/-0.0047 in the Blade pitch dimension.

which would which would result in a range of +/-50 microns in the projected depth of cut  The clb maintains the e blade pitch so that it will translate into a range of +/-5 microns in the projected depth of cut.