User blog comment:MakeShift/Two Deathstrokes?!/@comment-213.205.228.217-20131028162028/@comment-24034641-20131122012234

that's just the way it is, seeing Slade has had his right side of his face burnt, (which is the side that Slade stabbed) so therefore it's pretty much foreshadowing Slade turning into Deathstroke, or atleast a good version of him. And it was the right eye, not left I believe.