This text (2nd revision) was written by Erich W. Mack. An Arizona LDO, ABO-AC, NCLEC and approved technical level CE author for ABO and NCLE. With intentions of providing a much needed resource for aspiring Advanced ABO opticians. This guide is an invaluable source for learning more advanced ophthalmic optics, basic business principals, troubleshooting patient problems and solving some of the more tricky optics quandaries. This text reviews the more advanced topics seen on ABO and ABO Advanced exams. Also included are overviews on new topics such as, expanded infection types, additional optics equations, and vision therapy. For those planning on taking the advanced level ABO exam there is included a 198 question practice test and answer key. The practice questions are based on the most recent exam topics and questions.The 2nd revision corrects some editorial issues found in the original 1st edition.