The script builds an eyeball procedurally with geometries and shaders. Users can customize the component shapes through an UI. The whole theory is from Digital Duct Tape. I wrote this script a long time ago as an exercise when I first started to learn python language and Maya Python Programming.

• Maya
• Arnold(prioritized)/Mental Ray

• Copy eyeball.py into your maya script folder
• Run the script below, and the UI will show up.

import eyeball
eyeball.run()

• Select the eyeball controler, and click "set current" to activate editting to the eyeball.
• Adjust any attribtue and press Enter
• Render with Mental Ray