Once cataract surgeons master phaco chop, they rarely return to the divide and conquer method because of the dramatic gains in efficiency and safety. While divide and conquer is a reliable starting point for residents, it is typically a stepping stone. The primary reason for this shift to phaco chop is the reduction in ultrasound energy and efficiency and safety of the case. Divide and conquer requires extensive sculpting of deep grooves, which keeps the ultrasound tip active near the delicate posterior capsule for long periods. In contrast, phaco chop uses mechanical force to split the nucleus, significantly lowering the cumulative dissipated energy and protecting the corneal endothelium. Furthermore, phaco chop is much more efficient. By eliminating the time-consuming grooving process, surgeons can often remove a nucleus in half the time. This efficiency reduces intraocular inflammation and surgical stress. For surgeons, the technical “pleasure” of a well-executed chop combined with superior patient outcomes makes the slower, more energy-intensive divide and conquer technique feel obsolete. If you learn phaco chop, you will ditch divide-and-conquer!
