What you need:
Superimpose (Apple, .99)
Picture of your eye
Open superimpose, hit the top LEFT button, and load the picture of your eye as the foreground and the background
Go to 'transform' and hit the second button on the right, the button with four arrows, and hit it
Zoom ALL THE WAY OUT, then go to 'Masks'
Go to the top right settings button, hit the paintbrush button, and erase all of the picture (Ive already done this)
Go to the settings button again, this time hit the erase button, and circle around your eye (You can erase later)
Go to filters, and now you can get creative with the coloring buttons!
Once you have the desired color, go to masks, hit the fuzzy looking ball button, and blur until the eye color looks natural
Go to transform, hit the settings button, lower the transparency until desired And your done!
I DID NOT TAKE MY TIME! IF YOU TAKE YOUR TIME, THIS WILL BE BETTER THAN MINE ! THANKS