“…Regarding the risk of appearance of secondary ecstasias, such as complications in refractive surgery in all its variants, it is widely known that it depends, in large part, on the corneal depth lost by corneal ablation (as with PRK and LASIK) and the corneal interface depth created (as with LASIK) 4,19,20 . In case of SMILE technique, there are two factors: an interface is created at a certain depth, and the stroma thickness is lost by the extraction of the stromal lenticle 6,7 . Therefore, is essential to know the corneal stroma depth where the interface is created and the thickness of the stromal lenticle extracted.…”