Nice play with light here and the monochrome makes this quite evocative! The lighting of these images is interesting but it makes me wonder what the light source is; the highlights feel dim to me so the light source would be something like a candle behind a thin green cloth screen or something like that?
Some feedback: I know the right eye can certainly appear like that light-wise. But I would still have preferred introducing some more ambient light here so as to light the right eye more, or at least show a touch of curvature to the right eye's lobe - because I can't escape the impression that the right eye socket looks empty.
Good job with this, despite having a neutral expression it does appear to have a touch of mirth to him.
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Griatch