Increasing evidence indicates that smaller microcoaxial phaco incisions made with 1.8- and 2.2-mm blades offer greater ocular stability than 2.8-mm incisions. This video explains how to optimize the incision size used in microcoaxial cataract surgery and describes various aspects of the procedure including active and passive wound size measurements, fluidics, and IOL implantation. A study of fluid dynamics is performed with various input parameters set in specialized software.