A novel system for an iris of the human eye includes drying the tissue surface, applying colorant to the dried surface, and then drying the applied colorant. The system avoids tattooing, implanting, and corneal modification. Permanent results may be obtained. Colorants may be coatings or stains. Blown gas is controllably infused to maintain a constant pressure in the anterior chamber, and the blown gas is turned on and off by opening a path to the outside of the eye and closing such path, respectively.
