Differences between PRK and LASEK
PRK is an archaic, outdated way to perform surface ablation that Dr. Chynn used to perform, but stopped performing in 1999. PRK is always painful, takes forever to heal, requires people to miss a lot of work, and worse of all, is prone to scarring. LASEK was invented at Harvard by two of Dr. Chynn’s mentors, and preserves the safety of a non-cutting procedure, without any of the downside of delayed, painful recovery. Since he switched to LASEK, none of his patients complain about pain anymore, and most of them only have to take 2 days off of work. No surgeon on the planet actually performs both PRK and LASEK, as there is no reason to perform both the newer and outdated ways of performing a surface ablation. In reality, many doctors are really performing PRK, and then calling it LASEK (if a more informed patient asks), because they realize that they should be performing the more advanced technique.
HD vs. Standard procedure
Patients are often confused about all the terminology regarding LASIK and LASEK. Basically, the former is cutting, and the latter is non-cutting. A totally different issue is custom vs. standard. For clarity, here are all the terms that all indicate custom, meaning these terms are all synonyms: custom, wavefront, CustomVue, Hi-Def. The non-custom, non-standard type of treatment is usually referred to as “standard” (because non-custom or non-hi-def sounds bad to the customer). You should be very clear about what is the difference between these two options.