This improvement originates from the temporal modulations introduced by fixational eye movements in the visual input to the retina , which emphasize the high spatial frequency harmonics of the stimulus 這種改善作用來自于凝視中視覺輸入視網(wǎng)膜時(shí)眼球運(yùn)用所引起的暫時(shí)調(diào)節(jié)作用,其著重在高空間頻率刺激。