In various embodiments, a phacoemulsification cutting tip with a straight shaft and an angled portion off of the straight shaft may include a hook on the angled portion to move an axis of rotation of the cutting tip closer to alignment with an extended centerline of the shaft. The cutting tip may be configured to torsionally rotate back and forth on an axis perpendicular to centerline of the shaft (e.g., rotation around a y-axis). In some embodiments, lateral vibrations (e.g., side to side along an x-axis or z-axis perpendicular to the y-axis) that result from torsional rotation around the y-axis in a cutting tip without the hook may be reduced through use of the hook to balance the otherwise eccentrically weighted hook.在各種不同的具體例中,一個具有一直軸以及一偏離該直軸的斜向部的水晶體乳化術切割尖端可包括一在該斜向部上的鉤以帶動該切割尖端的一旋轉軸線更接近於與該軸的一延伸的中心線對齊。該切割尖端可被設置成在一條垂直於該軸的中心線的軸線上來回扭轉地旋轉(例如,繞著一y-軸線旋轉)。在一些具體例中,在一不具有鉤的切割尖端中由繞著該y-軸線扭轉旋轉所導致的側向振動(亦即,邊對邊沿著一垂直於該y-軸線的x-軸線或z-軸線)可經由使用該鉤來平衡不同的偏心加重鉤而被降低。202...切割尖端304...軸306...旋轉中心310...鉤312...角度314...距離316...延伸的軸中心線
