This book, Step by Step Reading Pentacam Topography, deals with pentacam topography. Corneal topography initially gained prominence in the sphere of refractive surgery for the main purpose of excluding potential candidates for RK or LASIK due to sub-clinical keratoconus. As technology developed, corneal topography developed into a therapeutic corneal tool when the data was used to drive topography-guided photorefractive keratectomy (PRK). In this book, the comparison made among the three most popular diagnostic devices in chapter one is of most importance; it informs the reader about the principles in general and specifically. Chapter four presents a thorough clinical approach of the refractive surgery candidate. The importance here stems from its relevance to the systematic methodology to study the case as a whole.