To grab a copy, check the link below.
What it is?
Auto Eye is a procedural generated material for the iris, done in Cycles, that will make easy to create eyes. With this product you will be able to experiment and create a wide variety of eyes quickly, you don't need to paint every eye from scratch for each new character you create.
Since Auto Eye uses procedural textures, you don't need to worry about resolution. Your eyes will hold well even for close up cameras.
More info here in the link below.