Focus is off, and the hair and shodows on the right hand side detract, in my opinion. Lighting is really harsh, but it kind of works for this shot. A tighter crop on the eye and eyebrow would have done wonders.
I have a few comments.
1. I really didn't feel the light in the eye, I personally would have cloned it out and gave a lower score because of less personal appeal.
2. I am a big fan of PS but think this goes a bit overboard, at least for my tastes. The reason for this is you still see the correct color of skin within the eye brows and around the eyes.
3. I do like the cropping because it's not just an eye, this gives you something to imagine with. It gives you some structure.
I gave a 5 based on composition and meeting the challenge.
The eye is an interesting subject for photography as it does strange things with light. You have captured a beautiful brown image here. I wish it were not as central on the picture as this gives a rather static feeling to the shot.
The expression in the eye is good. I wonder if you would have been more pleased if you had focused on the lens/pupil area rather than the brow/lid. Overall, the shot is overexposed. Perhaps you did this on purpose for detail, but it might have been more powerful if you had gotten a bit closer.
Like the detail of brow and eye against the over exposed face effect. I might have cropped out the right side to focus just on the eye and brow. Nice shot...