The only line added consciously is the hand. It leads the eye to the eye and thereby showing the viewers that it is in fact a figure. The shape on the right feels kind of right to be there, it really does not matter what it is. Compositional-wise , it works.
A 4" x 6" monochromatic portrait of Fear Factory's mighty frontman, Burton C. Bell. Honorably approved by the man himself. Prints for sale @ etsy.com/shop/DrawingsByLucia.