You get the TF-Note out, and start writing Nat's name down, while at the same time writing her appearance, and what to change about her. The first thing you change is Nat's eyesight, as you write down, "Natalie's glasses vanished, as she began to see much clearer from her perspective, as she saw everything".
That sentence writing resulted reality to come alive, as you see Natalie without her glasses, and notice her vision came back. You watch as Natalie looks at everything, and was happy that she got her original sight back. The only thing she didn't notice though, is that you were writing her changes down in the TF-Note, making it easier for her life. However, with a fixed eyesight on the top of the list, something was missing about the change you were giving Nat while sitting on the steps.