Originally Posted by cashewchop

You can forgo the flap option with prk, but painful and longer healing (aprox 30 days) as the outer surface is disolved away and must grow back. If you get a lasik touchup, this is sometimes the only option as the flap procedure was already done.
Eye drops are around a few weeks. Some people end up with using otc eye drops for comfort later on.
Only eye trama would cause the flap to lift..... Such as extreme chopsticks throwing competitions.....a while ago, military medical thinking said high g forces could be a problem on the "flap"