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Corneal impact of ultrasound and bevel position in phacoemulsification
Andreas Frohn1, Hans Burkhard Dick, Claus Peter Fritzen
1University Eye Hospital Tuebingen, Siegen, Germany. andreas.frohn@t-online.de
Purpose:
To investigate the amplitude of ultrasound waves that reach the cornea with the phacoemulsification tip at different angles.
Setting:
Institute for Applied Mechanics and Control Engineering, University of Siegen, Siegen, Germany.
Methods:
A model eye was constructed with an ultrasound tip (angle 45 degrees) in the typical position during the procedure and a sensor mounted in the apex of the artificial cornea. The sensor measured the incoming ultrasound waves. Thirty bursts of ultrasound energy were set at 100% power with the bevel of the tip facing up toward the cornea, and 30 bursts were set with the bevel facing down toward the lens.
Results:
There was no statistically significant difference in the measurements with the tips bevel up and bevel down.
Conclusions:
There was no significant difference in the corneal load from ultrasound waves with the phacoemulsification tip in a bevel-up or bevel-down position.