The OPD-Scan III helps me reach a goal of zero spherical aberration with my cataract patients. A few years ago, I studied how accurately and predictably dynamic skiascopy, the wavefront technology used measures spherical aberrations and guides IOL choice. When I chose from three different IOLs based on data from the device, postoperative spherical aberration for 40 patients was just +0.019±0.051 μm. When we can virtually eliminate spherical aberration for our cataract patients, we increase patient satisfaction. In particular, when patients have other visual problems that we can’t correct, even a relatively small change, such as reducing nighttime glare, can make a big difference in their lives.