Scintillation can refer to: Scintillation (astronomy), atmospheric effects which influence astronomical observations Interplanetary scintillation, fluctuations of radio waves caused by the solar wind Scintillation (physics), a flash of light produced in certain materials when they absorb ionizing radiation Scintillation (radar), an apparent rapid target displacement occurring on radar displays Scintillation (medicine), a rapidly oscillating pattern of visual distortions, often associated with migraine aura Scintillation counter, a device that measures ionizing radiation Scintillating grid illusion, an image in which compounded color contrasts cause an optical illusion of visual artifacts See also Scintillate (horse), a British-trained thoroughbred racehorse