For LALs, after lock-in, when does a residual refractive shift justify corneal enhancement rather than continued observation?

I would wait at least 4 weeks. There could be some residual diffusion occurring in the LAL after the monomers have been locked. In theory, if some of the monomers were not polymerized during the lock-in, they can diffuse within the LAL. Water then follows to equilibrate, and you can get a change in ...