• ISRS Course: Step-by-Step PRK and LASIK Description: Dr. Sonia H. Yoo discussed Step-by-Step PRK and LASIK at the ISRS Course: Introduction to Refractive Surgery for Residents presented at the Academy's 2012 Annual Meeting in Chicago. (Submitted by the ISRS) Subspecialty: Refractive Management / Intervention Level: Beginner Uploaded By: ISRS Multimedia Library