A new instrument for nucleus prolapse: results and surgical technique.

A new instrument for use in prolapsing a cataract nucleus into the anterior chamber during extracapsular cataract extraction is described. This instrument is a modification of the Kelman Blunt Irrigating Cystatome and the Youens Lens Manipulating Cannula. The tip is elongated, rounded, broadened, and set at an angle from the instrument shaft to enhance broad surface contact of the instrument tip with the nucleus equator. In a recent series of 100 consecutive cataract procedures it was possible to completely prolapse the nucleus into the anterior chamber in all but six cases. The surgical technique is described.