Ok this is the finished one.
To do this I went through different stages.
First I drew the outline for the eye in pencil on photoshop.
Then I drew over the eye with the pen tool so you could see it properly.
So now I could see were to colour in. I then got the paint brush tool and coloured it in with the simple colours you could see. I also blended some of the colour for the grey part of the eye.
I used the paint tool and found the colours I wanted to blend together. I basically painted a few line of the colours slowly becoming the other in between the two colours. then I used the smudge tool to make it look more effective.
So then finally adding the background and some more brush strokes to make it look like the final (at the top of page).





