Schor P, Rocha E, Cheema D P, Miller D
Federal University of Sao Paulo, Paulista School of Medicine.
J Refract Surg. 1997 Jan-Feb;13(1):89-90. doi: 10.3928/1081-597X-19970101-19.
To assess the accuracy and precision of the Barron radial vacuum trephine as an instrument for corneal lamellar dissection.
We describe a practical method to calibrate individual trephines prior to lamellar corneal procedures using the calibration microscope designed for diamond knives.
We observed that one turn (360 degrees) of the trephine produced a mean blade displacement of 0.25 mm. However, individual trephines demonstrated a significant range of variability.
For highly accurate trephination, it is useful to calibrate each individual trephine using the calibration microscope.
