Hi Caesar, You have gotten some very nice tones and shading in this piece. I have a few small comments, if you don't mind. First the eye lids look a little short to me. I think they should extend a little more to the left into the dark shaded area. The upper eyelid could be made to look a little fuller and rounder if you but a very faint hi-lite on the center of the bulge area (remember that an eye is a globe covered with skin - the eyelids). Also, the upper eyelid (and eye brow) has some thickness and will cast a shadow underneath itself across the eyeball.
Like I said, your work is great and these are just some small details that seem to need a little attention if you want to be truly realistic. Eyes are tough to do right.
Give a man a fish and you feed him for a day - Teach a man to fish and he will sit in a boat and drink beer all day! Joe V.