Do you have dark circles under your eyes? Try the Light Fantastic Cellular Concealing Brightening Eye Treatment ($490), launched by La Prairie this month. It promises a swift solution for that tired look. The magic component is Brightening Complex, a blend of strong vitamin C derivative, pearlescent minerals and silicone and light diffusers that give skin a luminous sheen and temporarily reduce lines and wrinkles. Festival Walk, Sogo, The Landmark.