OPD SCAN III is a refractive surgery system brought out by NIDEK. The main features are: It is five-in-one refractive workstation for all practitioners. It has a wider measurement area and greater topography resolution with blue placido rings. It presents an overview summary for optimal clinical decisions. The product combines the features of Wavefront Aberrometer, Topographer, Auto Refractometer, Auto Keratometer, Pupillometer and Pupillographer