In a method of transforming light, an optical film for performing the method and a display device having the optical film, an optical film includes an anisotropic film, an isotropic film, a .lamda./4 phase difference film and a .lamda./2 phase difference film. The anisotropic film having a first refractive index with respect to a first ray and a second refractive index with respect to a second ray. A refractive index of the isotropic film is substantially identical to the first refractive index. The .lamda./4 phase difference film delays wavelengths of the first and second rays by about .lamda./4. The .lamda./2 phase difference film delays the wavelength of the second ray by about .lamda./2.