I agree the line should be in between both eyes. The angle of the camera is a bit off putting. The shot isn't dead straight and is a slight cut to the left so the line should not go vertically up in the picture but should be slanted to the right slightly. Thus, in between both eyes.
I measured the distance from the red vertical line to the end of the photo and based on that, it appears that the line is tilted very slightly to the left. Correct that and it centers the line over his nose.
Fran is correct, he is aligned directly through his nose, but the line Jon put in is not vertical. I used the grid function in Photoshop to make sure that the rail in front on Ronnie was truly horizontal, then I put in a yellow line that was perpendicular to the rail using the same grid.
I also overlaid a protractor image to show how far off the original line is from vertical. Looks like a lot, but it's really only 1.5º off plumb. It's amazing the human brain can detect angular deviations of less than 1º, but if we couldn't, we wouldn't even be able to play the game.
