I can't believe just how awesome and realistic this is! I love drawings of eyes, and I've seen so many already that it surprises me to spot a good one that impresses me. This one is magnificent. I love the iris, the details on the eyelashes. Perfect
I did a lot of practice - but tip of the day, just draw what you see. Oh, and always treat the whites of the eyes as negative shapes - draw them in first and you should draw the iris/pupil by doing that.
Oh goody, I can't wait to see it It is good to do that sort of tight photorealism sometime, or at least try to do it (in my case) because it really helps with your perception and knowledge. It's like studying for an exam--pouring over the textbooks for all the details!
Thanks, but I like your eye. If I may suggest something - you could try getting a grey across the whole eyeball, which would then take away the need for a line around the highlight. Unless that was what you wanted, of course.