I want to take a small, valuable portion of your time to read this and let me say that this is just stunning. I love how you made the underneath of the upper eyelid all the way to the tear duct neon green. The eye is purple with random green splats, in which I think is very creative indeed. The light behind the eye makes it look as if the eye is hollow, and just a glass copy.
The veins add a great, WONDERFUL impact to the lighting effect to the artwork. The pupil seems a bit large if you're looking into a camera, but that's not really a problem; the amazing artwork completely distracts a vast majority of viewers. The reflection of the eyelashes into the glass looking part of the eye actually further visually proves the theory it could be a glass eye. All I have to say is that this eye is amazing, excellent job.