The exact etiology of myopia remains elusive. The author proposes the particle property of photon in living tissue and the photon-electron theory in living tissue, if the frequency of the photon beyond the threshold, the photon has enough energy to strike the electron away and forms a hole of a diameter in photon diameter scale in living tissue include the eye.The visual light which passes through the radiation hole in the eye cannot be refracted on the macula. Longer time of high-frequency electromagnetic radiation will cause more holes and a larger radius of holes, which lead to high myopia, this is in accordance with the investigation results that high myopic eyes have macular holes (micron scale). According to the particle property of the photon model, the eye elongated by the striking of high-frequency photons.