Eye color can be changed through surgery. Both Brightocular and Stroma Medical offer procedures for changing eye color, according to the company websites. While Stroma Medical is only offering color changes of brown to blue, as of November 2014, Brightocular offers an array of color changes.
Stroma Medical uses a laser that breaks down the natural pigmentation layer at the front of the iris, revealing an underlying blue eye. Stroma Medical is in the testing stages as of November 2014, according to the company website, so the permanence of the procedure is still unclear.
Brightocular changes eye color by implanting an artificial iris into the eye. The artificial iris is a thin, flexible, nontoxic prosthesis that is compatible with body tissue, according to the company website. These artificial iris implantations are used both for cosmetic and medical reasons.