Discussed here. Look at the center of the forehead, just above the area between the eyebrows. There is a reflection that shos a lighter area, and just above that is a line in the skin that goes up and to the left. Now, look at his right eye socket area. That same exact line is there, and if you look closely, everything that surrounds it is there as well.
That one still is one of the better photoshopped jobs I’ve seen.