光线疗法
Phototherapy \Pho`to*ther"a*py\, n. (Med.) The application of light for therapeutic purposes, esp. for treating diseases of the skin. -- {Pho`to*the*rap"ic}, {Pho`to*ther`a*peu"tic}, a.
phototherapy n : the use of strong light to treat acne or hyperbilirubinemia of the newborn