I am not quite sure with that but all i know is that cases related to cornea are case to case basis[individual] (Refer to medical handbook page 32). To my knowledge doctors don't prefer to operate patients with thickness less than 400 microns. and i don't think there is any such mandatory parameter set by DGCA regarding cornea thickness as one of my friend got it done and has no major issue getting through class one.
Pls refer to another pprune page for more information about risks and issues with DGCA.
http://www.pprune.org/south-asia-far...s-1-lasik.html
Handbook on Medical Assessment of Flight Crew
