If I go for LASIK enhancement 1 year later, will the corneal flap adherence weaken as it has to be opened again?

There are two ways to enhance after a LASIK procedure. My personal preference if enhancement needs to be done within six months, is to lift up the flap and enhance beneath the flap.

However if the LASIK enhancement is done after one year, then my preference is to do the enhancement from the surface as a LASEK procedure rather than to lift up and weaken the flap adherence.