Before revision: The DMEK technique involves the removal of a very thin sheet of tissue from the posterior side of a person's cornea, replacing it with the two innermost layers of corneal tissue from a donor's eyeball.
After revision: The DMEK technique involves the removal of a very thin sheet of tissue from the posterior side of a person's cornea, replacing it with the two posterior (innermost)(innermost) layers of corneal tissue from a donor's eyeball.