Patent ID: 8801780
Filing Date: 2014-08-12
Classification: A61B,A61F,Y10T

Abstract:
1. A method of coupling a plunger tip to a plunger of an IOL injection device, the method comprising: locating a plunger tip in alignment with the plunger; extending the plunger from an initial position towards the plunger tip to an engagement position; coupling the plunger and the plunger tip together; and retracting the plunger and plunger tip to the initial position, wherein extending the plunger from an initial position towards the plunger tip to an engagement position comprises actuating a motor of the IOL injection device to extend the plunger from the initial position to the engagement position, and the method further comprising: detecting a position of the plunger utilizing a back electromotive force (EMF) of the motor, a position of the plunger detected by the back EMF being within a range of a negative error position corresponding to a negative positional error and a positive error position corresponding to a positive positional error.