I know this post is relatively old, so I don't know if you're still looking for critique or not, but I thought I'd throw my two cents in anyway. I think your rendering is fairly decent, especially on that right (her left) eye. I mean, holy dang. You did a good job on that eye. Beautiful rendering, the shape is there, super lifelike, a fantastic job. The biggest problem I've noticed is that the proportions are out of whack in a lot of spots. For example, the chin is too large and is slightly facing forward instead of being tilted down, and also she has a much more rounded face, whereas you've really cut it in on the right side. If I were to offer any advice it would be to continue to watch proportions, as well as doing more skull studies to make sure you have the anatomy down pat.