Excimer lasers deliver ultraviolet light to localized areas of the skin. This treatment uses intense, focused doses of laser light to help control areas of mild to moderate psoriasis without harming healthy skin around them. Targeted laser therapy is as effective as traditional light therapy, but it works in fewer sessions with stronger doses of light that can reach deeper into the affected skin. Handheld laser wands can also reach psoriasis in hard-to-treat areas, such as the elbows, knees, palms of the hands, soles of the feet, and scalp.