• Post LASIK Power Surprise Description: Dr. David F. Chang of Los Altos, CA, performs an IOL exchange on a woman five years post-Crystalens implantation. The patient is a post-myopic LASIK patient with a very large IOL power surprise. Submitted by Dr. David F. Chang (United States) Subspecialty: Refractive Management / Intervention Level: Advanced Uploaded By: ISRS Multimedia Library