Apparently there's a medical procedure that can permanently turn your brown eyes blue.
Pioneered by Stroma Medical, the laser procedure works by eliminating the brown melanin that's present in the anterior layers of the iris.
Dr. Gregg Homer told CNN that the fundamental principle is that under every brown eye is a blue eye. He adds that there is no actual blue pigmentation in the eye.
Homer says the only difference between a brown eye and a blue eye is this very thin layer of pigment on the surface.