OMG that's amazing, VERY nicely done!!! I love how the shadow in the iris almost looks like the outline of a person, so, it's almost as if you're looking at your own outline reflecting in the dragon's eye..... Scary, but awesome!
Absolutely fantastic work on the texture! I quite like the lighting as well. Next time I would suggest painting shadows over the eye, instead of having it gradient-fade-to-black, but that's just me trying to be constructive. Keep up the lovely work!