IPL treatment reduces dark circles by destroying the pigment cells that cause discoloration. It also smoothens the skin under the eye due to its high energy light waves that penetrate the skin under the eye. The light waves constrict blood vessels, which results in less prominent discoloration. IPL treatment is one of the most effective treatments for dark circles, but is an expensive one. A person will be required to sit for several sessions (each about an hour long) to achieve the desired results. The frequency of the treatment depends on the magnitude of the circles and overall health and lifestyle of the patient.