THE APPLICATION OF VACUUM AS A METHOD AND MECHANISM FOR CONTROLLING EYE CHAMBER STABILITY

摘要

The invention relates to a phacoemulsification device which allows for better vacuum control. The device comprises a control unit having a vacuum sensor and/or a flow rate sensor. The handpiece of the device is adapted to be placed in an operative relationship with an eye for a surgical procedure. Irrigation fluid can be supplied to the handpiece while applying a vacuum to the handpiece to allow aspirating the irrigation fluid from the eye through the handpiece. During fluid aspiration, a vacuum level and/or flow rate is sensed which corresponds to an occlusion of the handpiece and from the sensed vacuum level and/or flow rate, a duration of the occlusion is determined. In response to the determined duration of occlusion, at least one of the handpiece parameters is varied.