 The patients are being asked to participate in this study because you have had cataract surgery and have received one of the IOLs implanted: ReSTOR 4.0 D, ReSTOR 3.0 D, Crystalens, andor ReZoom. The investigator in charge of this study is Dr. Helga Sandoval. This study is being conducted at Storm Eye Institute at the Medical University of South Carolina and will involve approximately 50 volunteers. 