i stopped doing PRK a decade ago, because of the pain, delayed recovery, and haze/scarring risk
then i switched to LASIK, which eliminated these problems, but added risk of Keratoconus or KC
you can't do LASIK on higher prescriptions safely, because your cornea would be too thin after
so 5 years i joined the movement called Back To The Surface which is gaining steam among surgeons
now i do an Advanced Surface Ablation, which is either a LASEK or an epiLASEK
the recovery is quick, there is no pain, and there is also little to no risk of scarring
the reason is by removing the epithelium in 1 piece, rather than grinding or scraping it off
you don't crush millions of epithelial cells, which is what initiates the inflammatory cascade
with an ASA, with Vit C, MMD, oral steroids, branded PredForte, and UV protection
i am lasering a patient every week who is between -10.00 and -15.00, without any haze or scarring!
so for high prescriptions, like myopia over -8, an ASA is safer than either PRK or LASIK