In this book, information related to parts of Phaco machine (hardware, software), definitions and description of parameters, use of parameters for all steps of Phaco surgery, application of parameters for a different variety of cataracts in the form of charts, and some tips related to troubleshooting in machine have been introduced. The idea of making this book is that surgeons can carry it easily with them to the operation theater and refer to set the proper parameters with respect to that particular case.