Could it happen that your eye color changes after a refractive eye surgery?

No: Refractive surgery does not change iris color. Depending on the type of surgery, there can be some mild redness on the white part of the eye that resolves after a couple of days. Certain drops used for high eye pressure or glaucoma (prostaglandin analogs) can change the color of a green-brown or grey/blue-brown or yellow brown iris to a more brown color in some patients.