The Nerd said:
F*** yeah! Do the eyes. Luke should have red eyes as he's swing his saber to chop of Vader's hand and when the closeup of Luke looking at his own hand, his eyes return to their natural color. This shows just how close Luke was to turning to the dark side.
No-one has had a hard time figuring out what was going on in Luke's head in that scene.....all without the benefit of the cheapest PT gag we got.....Sith eyes.