Adam Dorman made a wonderful tutorial for iris creation in Photoshop. This action automates that process. You can choose the color of the eye and other color and contrast settings.

I find this Photoshop action really useful so hopefully you will like it too.

Download for free this amazing Photoshop action that creates seals out of text or logos while letting the user determine the shape of the wax. All the layer styles remain intact so you can easily change the color of the wax seal, I hope you like it! Create a beautiful monogram logo using your initials and this awesome wax seal Photoshop action.