Realistic eye for beginners

Thought I'd make a quick post before work. So I tried following a tutorial on realistic eyes for beginners. It was harder than I thought it would be, but I'm always up for a challenge.

Given that the idea is to achieve realism, I am happy with my effort. The eyelashes, I maybe made too abundant, and I realised this after I looked back at the tutorial. I also had a difficult time getting the eyebrow to look more natural but I think with more practise, I'll get hair strokes down better.

I've included my first drawing and then my attempts to shade, plus some different angles of the finished drawing.

My initial drawing

Final product