Um sorry one more comment to make the iris look more realistic (Since I can\'t do it myself)... (If your using photoshop that is).
1. Select the Iris area on Eye.jpg
2. Create a New Layer (Cntl+Shft+N)
3. Type D (To set colors to default)
4. Filter > Render > Clouds
5. Filter > Pixelate > Mezzotint (Leave the settings the way they are)
6. Filter > Blur > Motion Blur...
---- Angle 90
---- Distance 25
7. Image > Adjustment > Hue and Saturation...
---- Make sure color is checked
---- adjust sliders till you get the desired color.
(Note: Some tweaking will be needed to make it seamless)
*Edit*
I just checked out the new texure... your gonna need to do that process several times for each angle. Sorry
