In various embodiments, a phacoemulsification tip may include a shaft and a cutting edge portion having at least a first and second bend. The geometry of the tip may be configured to result in a lateral displacement (ux), perpendicular to the shaft during torsional vibration of the tip at frequencies between 10 kHz and 60 kHz, of less than approximately 5% to 25% (e.g., 15%) of the lateral displacement at the distal end point of the tip throughout a portion of the shaft extending from the end of a conical portion of the tip through to the first bend in the cutting edge portion of the tip. Software and/or physical modeling may be used to determine the tip geometry.在各種實施例中，一水晶體乳化術尖端可能包括一桿身及具有至少一第一與第二彎曲的切邊部分。該尖端幾何形狀可能配置以導致從該尖端之錐形部分末端延伸貫穿該尖端切邊部分中之第一彎曲的該桿身部分整個在該尖端於10kHz與60kHz之間之頻率下的扭轉振動期間垂直於該桿身之一側向位移(ux)係小於該尖端於遠端點側向位移之大概5至25%(例如，15%)。軟體及/或物理模擬可能使用以決定該尖端幾何形狀。
